142 results on '"Chen Rong"'
Search Results
2. Study of Forecasting and Estimation Methodology of Oilfield Development Cost Based on Machine Learning
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Chen Rong, He Yuanyuan, Yi Chenggao, Shi Mingyu, and Wang Jianjun
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Estimation ,Artificial neural network ,business.industry ,Computer science ,General Chemical Engineering ,Energy Engineering and Power Technology ,General Chemistry ,Machine learning ,computer.software_genre ,Random forest ,Technical support ,Fuel Technology ,Development (topology) ,Ranking ,Feature (machine learning) ,Artificial intelligence ,Gradient boosting ,business ,computer - Abstract
Due to the oil price fluctuations in recent decades, international and national oil companies have developed programs of strategically oriented development and assets optimization. Many companies have also promptly promoted opportunities for oilfield joint ventures. Therefore, a fast and accurate assessment methodology of oilfield assets, including planning and costs assessment, is expected to be proposed. Oilfield development cost assessment can be dynamically affected by a number of factors, including oilfield internal indexes and macroeconomic indexes. Based on a machine learning algorithm and combining mathematical and statistical methodology, the Microsoft Azure machine learning studio has been used for modeling the oilfield development cost. The proposed method has adopted three algorithms: a neural network, a boosted decision tree, and a decision forest. Results showed that the boosted decision tree and decision forest algorithms can achieve PFI ranking with stable training results. The results of the machine training model have been analyzed, and they showed that the permutation feature importance (PFI) model can provide reasonable scientific and technical support for oil companies and help to attain more effective and accurate estimation and prediction of oilfield assets.
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- 2021
3. Automatic Background Construction and Object Detection Based on Roadside LiDAR
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Zhenyao Zhang, Xiang Wang, Jianying Zheng, Hao Xu, Chen Rong, and Fan Xueliang
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050210 logistics & transportation ,Pixel ,Computer science ,business.industry ,Mechanical Engineering ,05 social sciences ,Frame (networking) ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Point cloud ,Object detection ,Computer Science Applications ,Azimuth ,Digital image ,Lidar ,0502 economics and business ,Automotive Engineering ,Computer vision ,Artificial intelligence ,business ,Time complexity - Abstract
High-resolution micro traffic data are important to traffic safety and efficiency analysis. In this study, a roadside LiDAR sensor is used to collect 3D point clouds of surrounding objects. An automatic background construction and object detection method is proposed on the basis of the operation principle of the LiDAR sensor. In the algorithm, the discrete horizontal and vertical angular values can be considered as coordinates of pixels in digital images, and the farthest and mean distance of each azimuth are used to construct the background dataset. Then, vehicle and pedestrian points are extracted on the basis of the distance difference of each point with the same angular value between the target frame dataset and the background dataset. A density-based spatial clustering method is employed to group points into clusters and identify vehicles and pedestrians automatically. Finally, the performance of the algorithm is tested for roadside LiDAR data preprocessing under different traffic conditions. Our algorithm can perform well with high accuracy. Experimental results demonstrate that our algorithm can achieve a larger detection range and exhibit lower time complexity in comparison with a previously proposed algorithm.
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- 2020
4. A Nomogram for Prediction of Postoperative Pneumonia Risk in Elderly Hip Fracture Patients
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Tao Xu, Yongzeng Feng, Zili He, Yi-Min Weng, Jian Xiao, Chen-Rong Ke, Guangheng Xiang, and Xiaoyu Dong
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medicine.medical_specialty ,Hip fracture ,Receiver operating characteristic ,business.industry ,030503 health policy & services ,Health Policy ,Public Health, Environmental and Occupational Health ,Area under the curve ,Perioperative ,Postoperative pneumonia ,Nomogram ,medicine.disease ,03 medical and health sciences ,Pneumonia ,0302 clinical medicine ,Internal medicine ,Medicine ,030212 general & internal medicine ,0305 other medical science ,business ,Body mass index - Abstract
Purpose Pneumonia is one of the common complications of hip fracture. This study aimed to evaluate the risk factors and apply a nomogram to predict postoperative pneumonia in elderly hip fracture patients. Materials and Methods From August 2014 to October 2019, 1113 hip fracture patients who were older than 65 years and underwent surgical treatment in our hospital were subjects of this study. Univariate and multivariate Cox analyses were used to identify independent risk factors. A predictive nomogram model was built, and the discrimination and calibration were determined by receiver operating characteristic and calibration plot. Results A total of 166 patients developed pneumonia after operation (14.91%, pneumonia group) while the remaining 947 patients did not (85.09%, non-pneumonia group). According to the results, body mass index (OR, 0.76, 95% CI, 0.70 to 0.84, P
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- 2020
5. Autopsy of COVID-19 patients in China
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Bian, Xiu-Wu, Yao, Xiao-Hong, Ping, Yi-Fang, Yu, Shicang, Shi, Yu, Luo, Tao, He, Zhi-Cheng, Tang, Rui, Chen, Cong, Fu, Wen-Juan, Zhang, Hongyan, Zhang, Hua-Rong, Xiang, Dong-Fang, Li, Qing-Rui, Huang, Xuequan, Li, Tingyuan, Zhao, Pengnan, Wang, Chaofu, Fei, Xiaochun, Cai, Jun, Zhao, Lei, Zhang, Heng, Liu, Zhenghua, Liu, Liang, Wang, Guoping, Nie, Xiu, Zhou, Yiwu, Ren, Liang, Liu, Qian, Wang, Yi, Ao, Qilin, Wang, Xi, Duan, Yaqi, Li, Jiansha, Xiong, Jin, Xu, Sanpeng, Zhang, Jie, Huang, Sizhe, Yang, Ming, Huang, Bo, Li, Xiang, Peng, Lixu, Xi, Pan, Hua, Xiong, Su, Hua, Wangcheng, Sihua, Yu, Cheng, Wu, Haibo, Li, Heng, Ren, Yong, Chen, Xinwei, Liang, Liwei, Zhang, Zongxing, Chen, Rong, Deng, Fei, Qu, Guoqiang, Wang, Rongshuai, Wang, Yunyun, Zhou, Xiaowei, Wang, Fusheng, and Zhao, Jingmin
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2019-20 coronavirus outbreak ,Pediatrics ,medicine.medical_specialty ,Multidisciplinary ,Coronavirus disease 2019 (COVID-19) ,AcademicSubjects/SCI00010 ,business.industry ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,MEDLINE ,COVID-19 ,Autopsy ,Chinese academy of sciences ,Minimally invasive autopsy ,Pathology ,Medicine ,AcademicSubjects/MED00010 ,business ,China ,Perspectives - Abstract
Distribution of SARS-CoV-2 virus and pathological features of multiple organs in COVID-19 patients remains unclear, which interferes with the improvement of COVID-19 diagnosis and treatment. In this article, we summarize the pathological findings obtained from systematic autopsy (37 cases) and percutaneous multiple organ biopsy (“minimally invasive autopsy”, 54 cases). These findings should shed light on better understanding of the progression of COVID-19 infection and the means of more effective intervention.
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- 2020
6. Failure analysis of R-regions of CFRP hat-shaped structure under pull-off load
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Jiang Yong, Li Pengnan, Chen Rong, Li Changping, Li Shujian, Tae Jo Ko, and Niu Qiulin
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0209 industrial biotechnology ,Materials science ,business.industry ,Mechanical Engineering ,Failure mechanism ,02 engineering and technology ,Structural engineering ,Pull-off ,Finite element method ,Force analysis ,020303 mechanical engineering & transports ,020901 industrial engineering & automation ,0203 mechanical engineering ,Mechanics of Materials ,Bearing capacity ,business - Abstract
As a kind of typical structure, the hat-shaped structure (HSS) is widely used in carbon fiber reinforced plastics (CFRP) aircraft parts. In this work, a scheme of filling fillers and adding reinforcing plies in R-regions was proposed to strengthen the R-regions of HSS. Moreover, the force analysis of R-region with or without strengthening in R-region under pull-off load was presented. A finite element model was developed to study the failure behavior of R-regions. A series of HSS samples were fabricated by co-curing process. The pull-off tests of HSS were conducted to validate the model, and the failure mechanism of R-regions was further studied by characterizing the macro-micro structure of R-regions in HSS under pull-off load. Results showed that the structural bearing capacity of HSS can be improved by strengthening in R-regions. After strengthening in R-regions, the pull-off load was borne by multiple interfaces, and the interlaminar interface pull-off strength can increase by 38.8 %.
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- 2020
7. A stochasticlocation privacy protection scheme for edge computing
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Mohammed Al-Dhelaan, Mznah A. Rodhaan, Yuan Tian, Najla Al-Nabhan, Chen Rong Huang, Biao Song, and Abdullah Al-Dhelaan
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Scheme (programming language) ,Service (systems architecture) ,Computer science ,location privacy ,Cloaking ,02 engineering and technology ,Boom ,edge computing ,0502 economics and business ,QA1-939 ,0202 electrical engineering, electronic engineering, information engineering ,Edge computing ,computer.programming_language ,business.industry ,Applied Mathematics ,05 social sciences ,General Medicine ,location-based service ,Computational Mathematics ,Modeling and Simulation ,Information leakage ,Location-based service ,020201 artificial intelligence & image processing ,General Agricultural and Biological Sciences ,business ,Mobile device ,computer ,TP248.13-248.65 ,Mathematics ,050203 business & management ,Biotechnology ,Computer network - Abstract
Location-based Service has become the fastest growing activity related service that people use in their daily life due to the boom of location-aware mobile devices. In edge computing along with the benefits brought by LBS, privacy preservation becomes a more challenging issue because of the nature of the paradigm, in which peers may cooperate with each other to collect and analyze user's location data. To avoid potential information leakage and usage, user's exact location should not be exposed to the edge node. In this paper, we propose a stochastic location privacy protection scheme for edge computing, in which the geographical distribution of surrounding users is obtained by analyzing proposed long-term density map and short-term density map. The cloaking scheme transfers user's exact location to a cloaked location to satisfy predefined probability of having k-users in that area. Our scheme does not reveal any exact location information, thus it is practicable for the real scenario when edge computing is honest but curious. Extensive experimental results are conducted to verify the efficiency and effectiveness of our method. By varying the privacy protection requirements, the corresponding performance have been examined and discussed.
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- 2020
8. Characteristics of the excess pore water pressure of the marine liquefied stratum of suction bucket foundations under seismic load
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Yucong Han, Hao Dongxue, Chen Rong, Luo Haotian, and Wu Ke
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Pore water pressure ,Suction ,business.industry ,Seismic loading ,Fossil fuel ,Foundation (engineering) ,Liquefaction ,Geotechnical engineering ,Bearing capacity ,business ,Geology ,Seabed - Abstract
Offshore oil and gas resources are major sources of future global oil and gas increments. Suction bucket foundations are a new type of foundation that is widely used for offshore oil and gas exploitation platforms. Such platforms are often subjected to dynamic loads caused by storms, waves, or earthquakes, which cause the instability and liquefaction of seabed sand layer foundations. These loads jeopardize the safe operation of offshore oil and gas platforms. For this reason, the cyclic elastoplastic constitutive model is adopted in the ocean liquefaction stratum, in consideration of the foundation liquefaction and large deformation effects. To study the changes in the excess pore water pressure of the suction bucket foundation in different ocean liquefaction formation thicknesses under the action of seismic loads.
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- 2021
9. The First Occurrence of Angioedema After Discontinuation of Angiotensin-Converting Enzyme Inhibitor
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Aleesha Kainat, Noor Ul Ain, Chen Rong Phang, and Bhawna Agarwal
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Angioedema ,biology ,business.industry ,angioedema ,General Engineering ,facial angioedema ,Angiotensin-converting enzyme ,Pharmacology ,Discontinuation ,Allergy/Immunology ,angiotensin-converting enzyme inhibitors ,Otolaryngology ,immune system diseases ,drug-related side effects and adverse reactions ,Internal Medicine ,biology.protein ,Medicine ,bradykinin mediated angioedema ,medicine.symptom ,skin and connective tissue diseases ,business - Abstract
Angioedema is one of the dreaded side effects of angiotensin-converting enzyme (ACE) inhibitors. It has been well established in the literature and the timing of onset is variable from months to years after initiation of therapy. Patients remain at risk of recurrence of angioedema even after discontinuation of the drug if they developed it once while on the drug. While only recurrences of ACE inhibitor-induced angioedema are described in the literature, our patient did not develop angioedema while being on the drug and had the first occurrence of angioedema one month after the medication was discontinued. We argue that since our patient did report an ACE inhibitor-related dry cough, this case emphasizes the strength of the relation between the two common side effects of the ACE inhibitors. This favors that among the risk factors that predispose individuals to develop angioedema, ACE inhibitor-associated cough is a major one. Although the mechanism of ACE inhibitor-related cough is poorly understood, bradykinin seems to be the common culprit mediator for these two side effects. Hence, clinicians need to be aware of this potential threat and be cautioned when they witness an ACE inhibitor-related cough.
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- 2021
10. Topology Optimization of Hard-Coating Thin Plate for Maximizing Modal Loss Factors
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Haitao Luo, Jia Fu, Chen Rong, and Siwei Guo
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Frequency response ,Materials science ,damping ,business.industry ,thin-walled structure ,Topology optimization ,Surfaces and Interfaces ,Structural engineering ,engineering.material ,sensitivity ,Engineering (General). Civil engineering (General) ,hard coating ,Finite element method ,Surfaces, Coatings and Films ,Vibration ,Modal ,Coating ,Composite plate ,modal loss factors ,Materials Chemistry ,engineering ,TA1-2040 ,business ,Reduction (mathematics) ,topology optimization - Abstract
At present, hard coating structures are widely studied as a new passive damping method. Generally, the hard coating material is completely covered on the surface of the thin-walled structure, but the local coverage cannot only achieve better vibration reduction effect, but also save the material and processing costs. In this paper, a topology optimization method for hard coated composite plates is proposed to maximize the modal loss factors. The finite element dynamic model of hard coating composite plate is established. The topology optimization model is established with the energy ratio of hard coating layer to base layer as the objective function and the amount of damping material as the constraint condition. The sensitivity expression of the objective function to the design variables is derived, and the iteration of the design variables is realized by the Method of Moving Asymptote (MMA). Several numerical examples are provided to demonstrate that this method can obtain the optimal layout of damping materials for hard coating composite plates. The results show that the damping materials are mainly distributed in the area where the stored modal strain energy is large, which is consistent with the traditional design method. Finally, based on the numerical results, the experimental study of local hard coating composites plate is carried out. The results show that the topology optimization method can significantly reduce the frequency response amplitude while reducing the amount of damping materials, which shows the feasibility and effectiveness of the method.
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- 2021
11. Integrated Position and Attitude Adaptive Stabilization of Service Spacecraft for the Detumbling of Space Debris via Eddy Brake
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Tong Kewei, Chen Rong, Feng Zhang, Yan Ning, Wang Xiaoding, and Li Yang
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Lyapunov function ,Adaptive control ,Spacecraft ,business.industry ,Computer science ,Nonlinear control ,Attitude control ,symbols.namesake ,Control theory ,Position (vector) ,Backstepping ,Brake ,symbols ,business - Abstract
This paper deals with the integrated position and attitude adaptive control problem during the de-tumbling of space debris via eddy brake. To do so, a nonlinear coupled translation and rotation dynamics with electromagnetic effect is firstly formulated. The unknown system parameters are then analyzed and the regressor matrices are derived as well. In what follows, a nonlinear integrated position and attitude control scheme is proposed by adaptive backstepping technique to ensure a concurrent position and attitude stabilization. The closed-loop stability analysis is given in the Lyapunov framework. At last, numerical simulation verifies the effect of the proposed nonlinear control scheme.
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- 2021
12. The efficacy of Schroth exercises combined with the Chêneau brace for the treatment of adolescent idiopathic scoliosis: a retrospective controlled study
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Ruibo Zhu, Jian Xiao, Wei Wang, Chen-Rong Ke, Guangkui Yan, Chenghuang Mao, Yu-An Li, Xiao-Li Huang, Xianhong Yi, Tianlong Pan, Mingqiao Fang, Guangheng Xiang, and Zongyi Wu
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musculoskeletal diseases ,medicine.medical_specialty ,Adolescent ,Idiopathic scoliosis ,Scoliosis ,Function score ,Quality of life ,medicine ,Deformity ,Humans ,Kyphosis ,Balance (ability) ,Retrospective Studies ,Cobb angle ,business.industry ,Rehabilitation ,musculoskeletal system ,equipment and supplies ,medicine.disease ,humanities ,Brace ,Treatment Outcome ,Physical therapy ,Quality of Life ,medicine.symptom ,business ,human activities - Abstract
PURPOSE We aimed to determine the global effects of the Cheneau brace combined with Schroth exercises on adolescent idiopathic scoliosis (AIS). METHODS We analyzed 192 patients with AIS who underwent the Cheneau brace treatment alone or combined with Schroth best practice (SBP) from June 2013 to October 2019. There were 138 patients in the Brace group and 54 patients in the Brace + SBP group. Radiographs were obtained at various treatment durations. Answers to the health-related quality of life (HRQoL) questionnaire were recorded before the intervention and at the time of treatment wean. RESULTS The Cobb angle (-3.55°; p
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- 2021
13. Intravenous Thrombolysis in Acute Ischemic Stroke After Idarucizumab Reversal of Dabigatran Effect: Analysis of the Cases From Taiwan
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Yi-Heng Li, Ping Chen Chou, Yu Song Shih, Hsi Ming Chen, Cheng Yang Hsieh, Lu An Chen, Yi Te Tsai, Chen-Wen Fang, Po Lin Chen, Jung Tze Yeh, Chien Ming Lu, Mu Chien Sun, Chih Lin Chen, and Chen Rong Tsao
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Male ,Time Factors ,medicine.medical_treatment ,Taiwan ,Antibodies, Monoclonal, Humanized ,Asymptomatic ,Antithrombins ,Drug Administration Schedule ,Dabigatran ,03 medical and health sciences ,0302 clinical medicine ,Fibrinolytic Agents ,Risk Factors ,Atrial Fibrillation ,medicine ,Humans ,Thrombolytic Therapy ,cardiovascular diseases ,Infusions, Intravenous ,Blood Coagulation ,Stroke ,Aged ,Cerebral Hemorrhage ,Retrospective Studies ,Intracerebral hemorrhage ,medicine.diagnostic_test ,business.industry ,Rehabilitation ,Atrial fibrillation ,Idarucizumab ,Thrombolysis ,Middle Aged ,medicine.disease ,Treatment Outcome ,Tissue Plasminogen Activator ,Anesthesia ,Feasibility Studies ,Female ,Surgery ,Neurology (clinical) ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,030217 neurology & neurosurgery ,medicine.drug ,Partial thromboplastin time - Abstract
Background: Asians with atrial fibrillation carry a higher risk of ischemic stroke than non-Asians even under treatment of nonvitamin K antagonist oral anticoagulants. The purpose of the study was to observe the feasibility of intravenous thrombolytic therapy after administering a reversal agent, idarucizumab, in dabigatran-treated patients with acute ischemic stroke in Taiwan. Methods: Dabigatran-treated patients with acute ischemic stroke who received intravenous recombinant tissue plasminogen activator (rt-PA) after idarucizumab reversal were enrolled in the retrospective nationwide study. The clinical data, treatment course, and outcomes were recorded. Stroke severity was evaluated using the National Institutes of Health Stroke Scale (NIHSS) score. Any intracerebral hemorrhage (ICH) after rt-PA was detected by neuroimaging studies. Results: Ten dabigatran-treated patients (6 men, mean age 71.10 ± 7.96 years) with acute ischemic stroke were included. Before stroke, the mean CHA2DS2-VASc score was 4.50 ± 1.57 and 8 patients (80%) received dabigatran 110 mg twice daily. All patients were treated with 5 g idarucizumab, following which the activated partial thromboplastin time normalized. Intravenous rt-PA (mean dose .78 mg/kg) was initiated a mean time of 11.11 minutes after idarucizumab infusion. The NIHSS score improved significantly after thrombolysis (16.0 ± 6.67 at admission to 9.38 ± 4.75 at discharge, P = .016). ICH developed in 3 patients (30%). Two of them were asymptomatic and 1 patient suffered from symptomatic ICH leading to mortality. Conclusion: Our data reconfirmed the feasibility of intravenous rt-PA for Asian stroke patients after reversal of dabigatran effect with idarucizumab.
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- 2019
14. Neuroprotective Effect of Dichloromethane Extraction From Piper nigrum L. and Piper longum L. on Permanent Focal Cerebral Ischemia Injury in Rats
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Yuanbin Zhang, Yiwei Zhang, Lin Dong, Tingting Li, Bing Wang, Xueyan Fu, Chen Rong, and Shiyao Hua
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Male ,H&E stain ,Motor Activity ,Pharmacology ,Receptors, N-Methyl-D-Aspartate ,Neuroprotection ,Rats, Sprague-Dawley ,03 medical and health sciences ,symbols.namesake ,chemistry.chemical_compound ,0302 clinical medicine ,Calmodulin ,Western blot ,medicine ,Animals ,Phosphorylation ,Neurons ,Methylene Chloride ,Piper ,Behavior, Animal ,medicine.diagnostic_test ,biology ,Plant Extracts ,business.industry ,Rehabilitation ,Brain ,Infarction, Middle Cerebral Artery ,Synapsins ,biology.organism_classification ,Staining ,Disease Models, Animal ,Neuroprotective Agents ,nervous system ,chemistry ,Piperine ,Solvents ,alpha-Synuclein ,Nissl body ,symbols ,Immunohistochemistry ,Surgery ,Neurology (clinical) ,Calcium-Calmodulin-Dependent Protein Kinase Type 2 ,Piper nigrum ,Cardiology and Cardiovascular Medicine ,business ,Disks Large Homolog 4 Protein ,030217 neurology & neurosurgery - Abstract
Background Piper nigrum L. and Piper longum L. consist a classic formula in traditional Chinese Hui medicine and are widely used in treatment of stroke. To examine the therapeutic effect of neuron injury after apoplexy, we used a permanent middle cerebral artery occlusion model in rats to investigate the effects of dichloromethane fraction (DF) of Piper nigrum L. and Piper longum L. Materials and Methods After subjecting the rats to permanent middle cerebral artery occlusion, DF (100 and 200 mg/kg) were administered for 14 days. Neurological deficits and the degree of cerebral tissue injury was detected by 2,3,5-Triphenyltetrazolium Chloride Staining Hematoxylin and eosin staining and Nissl staining. Postsynaptic density protein 95 (PSD-95), synapsin-I (syn-I), and α-synuclein (α-syn) were stained by immunohistochemistry. PSD-95, Ca2+/calmodulin (CaM)-dependent protein kinase II (CaMK II), phosphorylated CaMK II (p-CaMK II), CaM, N-methyl D-aspartate receptor subtype 2B (NR2B) expression were detected by Western blot. Meanwhile, phytochemical profile of DF was determined through ultrahigh-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS). Results DF alleviated neurological deficits and markedly prevented ischemia-induced cellular damage. Immunohistochemical micrographs revealed that PSD-95 and syn-I proteins increased, and α-syn presented reduced expression in brain samples from the sham group. Western blot analyses revealed that the model group exhibited a noticeable reduction in PSD-95, p-CaMK II, CaM, and NR2B. The DF-treated model group exhibited increased PSD-95, p-CaMK II, CaM, and NR2B. UPLC-Q-TOF/MS analysis revealed eight main components of DF, of which piperine accounted for the largest proportion.
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- 2019
15. An Integrated Care Platform System (C3-Cloud) for Care Planning, Decision Support, and Empowerment of Patients With Multimorbidity: Protocol for a Technology Trial
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von Tottleben, Malte, Grinyer, Katie, Arfa, Ali, Traore, Lamine, Verdoy, Dolores, Lim Choi Keung, Sarah N., Larranaga, Igor, Jaulent, Marie-Christine, De Manuel Keenoy, Esteban, Lilja, Mikael, Beach, Marie, Marguerie, Christopher, Yuksel, Mustafa, Erturkmen, Gokce Banu Laleci, Klein, Gunnar O., Lindman, Pontus, Mar, Javier, Kalra, Dipak, Arvanitis, Theodoros N., Leprovost, Damien, Assele-Kama, Ariane, Dusenne, Mikael, Tsopra, Rosy, Sadou, Eric, Lamas, Eugénia, Toubiana, Laurent, Stroetmann, Veli, Vogt, Jess, Hammerschmidt, Reinhard, Schmidtmann, Daniel, Sherman, Marie, Eriksson, Anna, Gärd, Karin, Zhao, Lei, Despotou, George, Sarıgül, Bünyamin, Teoman, Alper, de Blas, Antonio, González, Nicolás, Fullaondo, Ane, Goode, Phil, Ekestubbe, Goran, Allwell-Brown, Eneimi, Fendukly, Mattias, Palacio, Manuel, Chen, Rong, Vander Stichele, Robert, Thienpont, Geert, Empirica ( Empirica Gesellschaft fuer Kommunikations und Technologieforschung MBH), Laboratoire d'Informatique Médicale et Ingénierie des Connaissances en e-Santé (LIMICS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Université Sorbonne Paris Nord, Kronikgune Institute for Health Services Research, University of Warwick [Coventry], Osakidetza-Basque Health Service, Umeå University, South Warwickshire University NHS Foundation Trust, Software Research Development and Consultancy Cooperation, Örebro University, Medixine [Espoo], Universiteit Gent = Ghent University (UGENT), Health data- and model- driven Knowledge Acquisition (HeKA), Inria de Paris, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche des Cordeliers (CRC (UMR_S_1138 / U1138)), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Université Paris Cité (UPCité)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Université Paris Cité (UPCité), Centre de Recherche des Cordeliers (CRC (UMR_S_1138 / U1138)), Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO), The C3-Cloud project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement number 689181., European Project: 689181,H2020,H2020-PHC-2015-single-stage,C3-Cloud(2016), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Université Paris Cité (UPCité)-École pratique des hautes études (EPHE), TSOPRA, Rosy, and A Federated Collaborative Care Cure Cloud Architecture for Addressing the Needs of Multi-morbidity and Managing Poly-pharmacy - C3-Cloud - - H20202016-05-01 - 2020-04-30 - 689181 - VALID
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clinical decision support ,renal failure ,Decision support system ,guidelines reconciliation ,Computer science ,[SDV]Life Sciences [q-bio] ,Social Sciences ,heart failure ,Cloud computing ,clinical ,Personalized care plans ,Acceptability ,Diabetes mellitus type 2 ,Medicine and Health Sciences ,Evaluation ,Empowerment ,media_common ,evaluation ,Depression ,Clinical decision support ,General Medicine ,Predictive modeling ,[SDV] Life Sciences [q-bio] ,usability ,depression ,Preprint ,predictive modeling ,Hälso- och sjukvårdsorganisation, hälsopolitik och hälsoekonomi ,diabetes mellitus type 2 ,Renal failure ,Technology and Engineering ,decision support ,multimorbidity ,media_common.quotation_subject ,Usability ,Trial protocol ,Heart failure ,[INFO] Computer Science [cs] ,QA76 ,Cost-benefit evaluation ,acceptability ,Multi morbidity ,[INFO]Computer Science [cs] ,Operations management ,polypharmacy ,business.industry ,personalized care plans ,Multimorbidity ,Health Care Service and Management, Health Policy and Services and Health Economy ,R1 ,Integrated care ,Polypharmacy ,cost-benefit evaluation ,business ,Guidelines reconciliation - Abstract
Background There is an increasing need to organize the care around the patient and not the disease, while considering the complex realities of multiple physical and psychosocial conditions, and polypharmacy. Integrated patient-centered care delivery platforms have been developed for both patients and clinicians. These platforms could provide a promising way to achieve a collaborative environment that improves the provision of integrated care for patients via enhanced information and communication technology solutions for semiautomated clinical decision support. Objective The Collaborative Care and Cure Cloud project (C3-Cloud) has developed 2 collaborative computer platforms for patients and members of the multidisciplinary team (MDT) and deployed these in 3 different European settings. The objective of this study is to pilot test the platforms and evaluate their impact on patients with 2 or more chronic conditions (diabetes mellitus type 2, heart failure, kidney failure, depression), their informal caregivers, health care professionals, and, to some extent, health care systems. Methods This paper describes the protocol for conducting an evaluation of user experience, acceptability, and usefulness of the platforms. For this, 2 “testing and evaluation” phases have been defined, involving multiple qualitative methods (focus groups and surveys) and advanced impact modeling (predictive modeling and cost-benefit analysis). Patients and health care professionals were identified and recruited from 3 partnering regions in Spain, Sweden, and the United Kingdom via electronic health record screening. Results The technology trial in this 4-year funded project (2016-2020) concluded in April 2020. The pilot technology trial for evaluation phases 3 and 4 was launched in November 2019 and carried out until April 2020. Data collection for these phases is completed with promising results on platform acceptance and socioeconomic impact. We believe that the phased, iterative approach taken is useful as it involves relevant stakeholders at crucial stages in the platform development and allows for a sound user acceptance assessment of the final product. Conclusions Patients with multiple chronic conditions often experience shortcomings in the care they receive. It is hoped that personalized care plan platforms for patients and collaboration platforms for members of MDTs can help tackle the specific challenges of clinical guideline reconciliation for patients with multimorbidity and improve the management of polypharmacy. The initial evaluative phases have indicated promising results of platform usability. Results of phases 3 and 4 were methodologically useful, yet limited due to the COVID-19 pandemic. Trial Registration ClinicalTrials.gov NCT03834207; https://clinicaltrials.gov/ct2/show/NCT03834207 International Registered Report Identifier (IRRID) RR1-10.2196/21994
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- 2022
16. A nomogram for predicting reduction loss risk after locking plate fixation for proximal humeral fractures
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Chen-rong Ke, Ji-Qi Wang, Bing-Jie Jiang, and You-Ming Zhao
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Multivariate statistics ,medicine.medical_specialty ,Humeral Fractures ,Multivariate analysis ,Calcar ,business.industry ,medicine.medical_treatment ,Univariate ,Perioperative ,Nomogram ,Surgery ,Fracture Fixation, Internal ,Nomograms ,Locking plate fixation ,medicine ,Shoulder Fractures ,General Earth and Planetary Sciences ,Humans ,business ,Bone Plates ,Reduction (orthopedic surgery) ,General Environmental Science ,Retrospective Studies - Abstract
Purpose The purpose of our study was to determine the risk factors for reduction loss in patients with proximal humeral fractures after locking plate fixation and establish a nomogram prediction model. Methods We retrospectively analyzed the clinical data of proximal humeral fractures patients who had been surgically treated for locking plate in our institution from January 2016 to December 2018. Perioperative information was obtained through the electronic medial record system, univariate and multivariate analyzes were performed to determine the risk factors of reduction loss, and a nomogram model was constructed to predict the risk of reduction loss. The predictive performance and consistency of the model were evaluated by the consistency coefficient (C-index) and the calibration curve, respectively. Results 115 patients were finally enrolled in our study. Multivariate analysis results showed that age, fracture classification, medial comminution, and calcar screw status were independent risk factors for reduction loss. The accuracy of the contour map for predicting transfusion risk was 0.944. Conclusion We found a correlation between reduction loss and age, fracture classification, medial comminution, and calcar screw status after locking plate fixation for proximal humeral fractures patients. Our nomogram is helpful for clinicians to identify high-risk patients, early intervention and reduce the incidence of reduction loss.
- Published
- 2021
17. Research on Rural Financial Innovation Model Based on 'Internet +'
- Author
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Chen Rong Qun, Li Yan, and Dou Ting Ting
- Subjects
Financial innovation ,business.industry ,The Internet ,Marketing ,business - Published
- 2021
18. Histogram-based Self-adaptive Segmented Linear Method of Grayscale Transformation for Infrared Images
- Author
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Gu Xuanxuan and Chen Rong
- Subjects
Infrared ,Computer science ,business.industry ,media_common.quotation_subject ,Image segmentation ,Temperature measurement ,Grayscale ,Computer Science::Graphics ,Transformation (function) ,Computer Science::Computer Vision and Pattern Recognition ,Histogram ,Computer Science::Multimedia ,Contrast (vision) ,Computer vision ,Artificial intelligence ,Noise (video) ,business ,media_common - Abstract
In view of the high noise and contrast of the images of infrared temperature measurement in the environment of high temperature, high dust and high air flow, this paper proposes a linear method of grayscale transformation with the statistical method of grayscale histogram and according to the principle of "the display of narrow space areas by the grayscales of infrared images", so as to find out two wave valleys with the maximum grayscale area from the perspectives of high and low grayscales respectively, and use them as segmented transformation points to stretch and suppress different grayscale ranges of infrared images. As shown by the experimental results, in the high-noise environment, the enhancement effect of infrared images is obvious, the grayscales are uniform, the image details can be maintained desirably, and the computational efficiency of the algorithm is high.
- Published
- 2020
19. Real-Time S-T Analysis Method Based on Speaker Recognition
- Author
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Chen Rong, Gui-lin Liu, and Zeng-zhao Chen
- Subjects
Classroom teaching ,Class (computer programming) ,Computer science ,business.industry ,Theoretical research ,Speaker recognition ,computer.software_genre ,ComputingMilieux_COMPUTERSANDEDUCATION ,Identity (object-oriented programming) ,Artificial intelligence ,business ,Curriculum ,computer ,Analysis method ,Natural language processing - Abstract
With the continuous deepening of curriculum reform, teaching evaluation has become an important part of investigating the effectiveness of classroom teaching. This study improved the original S-T analysis method with speaker recognition technology that tracks the speaker's identity in class speech in real time. Combining the theoretical research of information technology-driven intelligent evaluation of classroom teaching, 6 lessons were selected as samples, and the original S-T analysis method and real-time S-T method were used for comparative study, which verified the effectiveness of the proposed real-time S-T analysis method.
- Published
- 2020
20. Research on Artificial Intelligence Assisted Teacher Developmental Evaluation from the Perspective of Reflective Practice
- Author
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Li Hao, Liu Yangjun, and Chen Rong
- Subjects
Action (philosophy) ,business.industry ,Process (engineering) ,Computer science ,Reflective practice ,Professional development ,ComputingMilieux_COMPUTERSANDEDUCATION ,Information technology ,Context (language use) ,Artificial intelligence ,Informatization ,business ,Reflection (computer graphics) - Abstract
With the gradual integration of information technology and education and teaching, the innovative application of education informatization has brought new opportunities for teacher evaluation and professional development. The article integrates “recognition in action” and “reflection in practice” with artificial intelligence technology, and establishes a new framework for teacher development evaluation based on teaching reflection, and integrates process diagnosis and reflective practice supported by intelligent technology into the teaching evaluation link. It solves the longstanding practical problems of “conflict between evaluation and feedback” and “disconnection between feedback and development” in the past teaching evaluation, so as to provide theory and application reference for the implementation of teacher development evaluation in the context of wisdom education.
- Published
- 2020
21. Nomograms Predict Overall Survival and Cancer-Specific Survival in Patients with Fibrosarcoma: A SEER-Based Study
- Author
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Yi-Min Weng, Jian Xiao, Guangheng Xiang, Yu-An Li, Chen-Rong Ke, Sipin Zhu, Mingqiao Fang, Lei Xu, and Zhu Juanjuan
- Subjects
0301 basic medicine ,Oncology ,medicine.medical_specialty ,Multivariate statistics ,Multivariate analysis ,Article Subject ,business.industry ,Univariate ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Cancer ,Nomogram ,medicine.disease ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Internal medicine ,Epidemiology ,medicine ,Overall survival ,business ,Fibrosarcoma ,RC254-282 ,Research Article - Abstract
Purpose. Due to the rarity, it is difficult to predict the survival of patients with fibrosarcoma. This study aimed to apply a nomogram to predict survival outcomes in patients with fibrosarcoma.Methods. A total of 2235 patients with diagnoses of fibrosarcoma were registered in the Surveillance, Epidemiology, and End Results database, of whom 663 patients were eventually enrolled. Univariate and multivariate Cox analyses were used to identify independent prognostic factors. Nomograms were constructed to predict 3-year and 5‐year overall survival and cancer‐specific survival of patients with fibrosarcoma.Results. In univariate and multivariate analyses of OS, age, sex, race, tumor stage, pathologic grade, use of surgery, and tumor size were identified as independent prognostic factors. Age, sex, tumor stage, pathologic grade, use of surgery, and tumor size were significantly associated with CSS. These characteristics were further included to establish the nomogram for predicting 3-year and 5-year OS and CSS. For the internal validation of the nomogram predictions of OS and CSS, theC-indices were 0.784 and 0.801.Conclusion. We developed the nomograms that estimated 3-year and 5-year OS and CSS. These nomograms not only have good discrimination performance and calibration but also provide patients with better clinical benefits.
- Published
- 2020
- Full Text
- View/download PDF
22. Research of Demand Response Method for Diversified Users Based on The Real-Time Electricity Price
- Author
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Chen Rong, Jiang Sifan, Shen Kaicheng, Zhang Zhanlong, and Tang Qian
- Subjects
Demand response ,Consumption (economics) ,business.industry ,Computer science ,Distributed generation ,Photovoltaic system ,Benchmark (computing) ,Autoregressive integrated moving average ,Electricity ,Environmental economics ,business ,Renewable energy - Abstract
In this paper, the diversified users’ demand response method based on the real-time electricity price is studied, considering the diversified demand side subject, including photovoltaic users and distributed energy storage users. For ordinary users, photovoltaic users and distributed energy storage users, etc., according to the operating characteristics, the users’ loads or electrical equipment are classified and modeled. And through the seasonal ARIMA model, real-time electricity price and photovoltaic power of the future are forecasted, providing reference for the optimization of user demand response. At the same time, considering reducing electric charge as the objective function of the user. Thus, a demand response model adapted to multiple subjects and diversified users based on real-time electricity price is established. By solving the demand response model, and proposing a benchmark electricity consumption scheme for comparison, the validity of the demand response model in promoting the consumption of renewable energy and improving the user benefits is verified.
- Published
- 2019
23. Intelligent community stratification optimization scheduling strategy based on demand-responsive energy cells
- Author
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Chen Rong, Zhang Zhanlong, Wu Juewei, and Yu Jie
- Subjects
Smart community ,Operations research ,business.industry ,Energy management ,Computer science ,Total cost ,On demand ,The Internet ,business ,Economic benefits ,Scheduling (computing) - Abstract
In the context of the energy Internet, research on regional energy management is of great significance. Focusing on this topic, this paper proposes a model of demand-responsive(DR)energy cells, and establishes a hierarchical optimization scheduling model. The upper layer takes the total cost of the smart community as the objective function, and the lower layer, considering the DR management, takes the lowest comprehensive cost of each energy cells as the objective function. This study is aimed at presenting a two-layer optimization model for the smart community based on the DR energy cell. In this paper, the optimization strategy of maximizing economic benefits is obtained through the iteration of the upper and lower models. The model can improve the economics of the smart community.
- Published
- 2019
24. First cases and risk factors of super yeast Candida auris infection or colonization from Shenyang, China
- Author
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Shitong Cheng, Chen Rong, Hua Nian, Fushun Li, Hong Shang, Sufei Tian, and Yunzhuo Chu
- Subjects
Male ,0301 basic medicine ,China ,medicine.medical_specialty ,Antifungal Agents ,Epidemiology ,030106 microbiology ,Immunology ,Microbial Sensitivity Tests ,Drug resistance ,Urinary Catheters ,Communicable Diseases, Emerging ,Microbiology ,Article ,03 medical and health sciences ,Risk Factors ,Drug Resistance, Multiple, Fungal ,Virology ,Internal medicine ,Drug Discovery ,Prevalence ,medicine ,Humans ,Colonization ,Risk factor ,Candida albicans ,Phylogeny ,Aged ,Candida ,Retrospective Studies ,Aged, 80 and over ,biology ,business.industry ,Candidiasis ,Sputum ,Retrospective cohort study ,General Medicine ,Middle Aged ,biology.organism_classification ,Control subjects ,Diarrhea ,Infectious Diseases ,Candida auris ,Female ,Parasitology ,medicine.symptom ,business - Abstract
For the first time, we identified 15 cases of Candida auris in Shenyang, China, and then performed a risk factor assessment for these patients compared with 30 control subjects who were hospitalized in the same ward during the same period of time as the infected patients. We found that diarrhea, gastrointestinal decompression, infection, or colonization with other Candida isolates (especially Candida albicans) and tetracycline antibiotics were all risk factors for C. auris infection or colonization. Diarrhea and tetracycline antibiotics were independent risk factors. We suggest clinicians pay special attention to the emergence of multidrug-resistant C. auris infections or colonization.
- Published
- 2018
25. Roadside Magnetic Sensor System for Vehicle Detection in Urban Environments
- Author
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Hao Xu, Chen Rong, Wang Qing, Jianying Zheng, and Bin Xu
- Subjects
050210 logistics & transportation ,Engineering ,business.industry ,Mechanical Engineering ,010401 analytical chemistry ,05 social sciences ,Detector ,Real-time computing ,Video camera ,01 natural sciences ,0104 chemical sciences ,Computer Science Applications ,law.invention ,Key distribution in wireless sensor networks ,law ,Sensor node ,0502 economics and business ,Automotive Engineering ,Wireless ,business ,Communications protocol ,Intelligent transportation system ,Wireless sensor network ,Simulation - Abstract
Intelligent Transportation Systems (ITS) are widely researched to improve the traffic situation. In ITS, vehicle detection system plays a significant role. At present, vehicle detection is often conducted by inductive loops, which are very expensive and inconvenient to install and maintain. Video camera is another frequently used detector, but it needs high computing power. In order to solve these problems, this paper focuses on the development of a roadside magnetic sensor system for vehicle detection. The device is installed at the side of the road and measures traffic in the adjacent lane (the closest lane to the sensor node). The data are transmitted by the IEEE 802.15.4 communication protocol. A novel adapted threshold state machine algorithm is proposed to detect vehicles. Since false judgments created by large vehicles passing in the nonadjacent lane (the lane next to the closest lane to the sensor node) are frequent in urban environments, a novel feature extracted by fusion of three magnetic sensor signals are proposed to reduce this error. The developed magnetic sensor system is wireless, compact, and cost-effective. The experimental results show that the proposed system achieves high accuracy and is viable in urban environments.
- Published
- 2018
26. Construction and practice of automation and informatization in the outpatient dispensary
- Author
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Chen Rong, Bao Jian'an, LiJun Yao, and BaoChen Gu
- Subjects
Pharmacology ,Dispensary ,Engineering ,business.industry ,Drug Discovery ,Pharmaceutical Science ,Operations management ,Informatization ,business ,Automation - Published
- 2017
27. Degradation behavior and degradation mechanism of bridged-grain polycrystalline silicon thin film transistors under AC gate bias stress
- Author
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陈荣盛 Chen Rong-sheng, 郭海成 Kwok Hoi-sing, 张猛 Zhang Meng, 王文 Wong Man, 夏之荷 Xia Zhi-he, and 周玮 Zhou Wei
- Subjects
Materials science ,business.industry ,engineering.material ,Bias stress ,Electronic, Optical and Magnetic Materials ,Polycrystalline silicon ,Thin-film transistor ,Signal Processing ,engineering ,Optoelectronics ,Degradation (geology) ,business ,Instrumentation ,Mechanism (sociology) - Published
- 2017
28. Research on Impedance Model of Intelligent Drill String Based on the Average Transformation Theory
- Author
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Hu Ze, Ge Liang, Xie Xiaohui, Chen Rong, and Gu Sanchun
- Subjects
Engineering ,Environmental Engineering ,business.industry ,Drill pipe ,Transfer function ,Signal ,Drill string ,Analog signal ,Transmission (telecommunications) ,Transmission line ,Electronic engineering ,Environmental Chemistry ,Digital signal ,business ,Waste Management and Disposal - Abstract
Cable transmission has its intrinsic advantages and it is the development tendency of intelligent drilling among all kinds of signal transmission. According to the structure characteristics of the intelligent drill string, this paper analyzes the transmission line distribution parameters of intelligent drill string combined with average transmission theory; transfer matrixes of single drill pipe, drill pipe joint and that of cascaded transmission line between them are all calculated by the transmission line transfer function; impedance model of intelligent drill string communication channel model are built according to that transfer matrix based on the two-port network, then this model is simulated by experiment and the result is analyzed; curve of error rate is got and the influence of different signal-noise ratio, different transmission rate and different transmission distance on signal transmission performance are analyzed. This model simplifies the calculation, and the frequency characteristics and attenuation characteristics of transmission line are obtained under the analog signal and the digital signal, then the average transmission signal characteristics of intelligent drill string is analyzed by intuitive squiggle. Maybe this paper could provide some theoretical guidance for intelligent drill string.
- Published
- 2017
29. Identify High-Impact Bug Reports by Combining the Data Reduction and Imbalanced Learning Strategies
- Author
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Hui Li, Siwen Wang, Tingting Li, Shikai Guo, Chen Rong, Wei Miaomiao, and Chen Guo
- Subjects
Computer science ,media_common.quotation_subject ,Feature selection ,02 engineering and technology ,Machine learning ,computer.software_genre ,lcsh:Technology ,lcsh:Chemistry ,feature selection ,class imbalance ,0202 electrical engineering, electronic engineering, information engineering ,General Materials Science ,Quality (business) ,Software system ,Instance selection ,Set (psychology) ,Instrumentation ,lcsh:QH301-705.5 ,media_common ,Fluid Flow and Transfer Processes ,Class (computer programming) ,instance selection ,business.industry ,lcsh:T ,Process Chemistry and Technology ,General Engineering ,020207 software engineering ,Automation ,lcsh:QC1-999 ,Computer Science Applications ,lcsh:Biology (General) ,lcsh:QD1-999 ,lcsh:TA1-2040 ,020201 artificial intelligence & image processing ,high-impact bug reports ,Artificial intelligence ,business ,lcsh:Engineering (General). Civil engineering (General) ,computer ,lcsh:Physics ,Data reduction - Abstract
As software systems become increasingly large, the logic becomes more complex, resulting in a large number of bug reports being submitted to the bug repository daily. Due to tight schedules and limited human resources, developers may not have enough time to inspect all the bugs. Thus, they often concentrate on the bugs that have large impacts. However, there are two main challenges limiting the automation technology that would help developers to become aware of high-impact bug reports early, namely, low quality and class distribution imbalance. To address these two challenges, we propose an approach to identify high-impact bug reports that combines the data reduction and imbalanced learning strategies. In the data reduction phase, we combine feature selection with the instance selection method to build a small-scale and high-quality set of bug reports by removing the bug reports and words that are redundant or noninformative, in the imbalanced learning strategies phase, we handle the imbalanced distributions of bug reports through four imbalanced learning strategies. We experimentally verified that the method of combining the data reduction and imbalanced learning strategies could effectively identify high-impact bug reports.
- Published
- 2019
- Full Text
- View/download PDF
30. Knockout of MicroRNA-155 Ameliorates the Th17/Th9 Immune Response and Promotes Wound Healing
- Author
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Hong-Fei Zhu, Yong Zhu, and Chen-Rong Wang
- Subjects
Male ,Inflammation ,Biochemistry ,Mice ,Immune system ,Fibrosis ,microRNA ,Genetics ,medicine ,Animals ,Immune homeostasis ,Mice, Knockout ,Wound Healing ,integumentary system ,business.industry ,Gene Expression Profiling ,Histology ,Cell Differentiation ,T-Lymphocytes, Helper-Inducer ,medicine.disease ,In vitro ,Up-Regulation ,Disease Models, Animal ,MicroRNAs ,Cancer research ,Cytokines ,Th17 Cells ,medicine.symptom ,Wound healing ,business - Abstract
MiRNAs are integral for maintaining immune homeostasis and self-tolerance. In this study, qPCR analyses were performed to determine which miRNAs play an important role in wound healing. Next, an experiment in a model of wound healing was performed, and histology, mRNA expression and T-cell subpopulations in wound tissue were analyzed. The accelerated experiments were performed by local injection of either rIL-17A and/or rIL-9 after wound healing. In vitro, the differentiation of Th17/Th9 in miR-155+/+ or miR-155-/- mice was investigated, and the target genes of miR155 were analyzed. From our findings, miR-155-/- in mice promoted wound healing and weakened T cell-mediated inflammation, especially in IL-17/IL-9, and less severe skin fibrosis developed in the mice. rIL-17A and/or rIL-9 could exacerbate inflammatory injury and delay wound healing. We also demonstrated that miR-155-/- led to a defect in the differentiation of Th17/Th9 in vitro, and this effect of IL-17/IL-9 might be related to the expression of C-maf, which is a target gene of miR155. MiR-155 regulated IL-17/IL-9-related inflammation in wound healing and might be a potential therapeutic target to attenuate the inflammatory response in wound tissue and promote the closure of wound injuries.
- Published
- 2019
31. Effects of alfalfa (Medicago sativa L.) degradation on herbage distribution and diversity in the semi-arid Loess Plateau
- Author
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陈荣 Chen Rong, 张洋东 Zhang Yangdong, 李广 Li Guang, 王子婷 Wang Ziting, 张继强 Zhang Jiqiang, 柴春山 Chai Chunshan, and 杨磊 Yang Lei
- Subjects
Ecology ,Agronomy ,business.industry ,Distribution (economics) ,Degradation (geology) ,Loess plateau ,Medicago sativa ,Biology ,business ,Arid ,Ecology, Evolution, Behavior and Systematics - Published
- 2019
32. Flocculation Effect Detection of Chemical Wastewater Based on Image Processing
- Author
-
Tang Jia Li and Huang Chen Rong
- Subjects
0106 biological sciences ,Flocculation ,010304 chemical physics ,Automatic control ,business.industry ,Computer science ,Scale (chemistry) ,Process (computing) ,Image processing ,01 natural sciences ,Fractal dimension ,Image (mathematics) ,010608 biotechnology ,0103 physical sciences ,Process engineering ,business ,SIMPLE algorithm - Abstract
With the image correction technology, a deep study and analysis was performed on the mutual relationships among a series of key parameters, including the coagulant dosage and the equivalent diameter, fractal dimension and concentration characteristics of the flocculation image, in the correction process of the chemical wastewater. Considering the actual operation environment and the real-time requirements of automatic dosing control, the Retinex algorithm was adopted in this article to solve the problems of uneven light distribution occurring in the process of experiment. In addition, another algorithm, the simple algorithm, was also applied to the calculation in the link of image correction, so as to shrink the program scale. According to the simulation results, it was indicated that the simulation operation was of relatively good practicability in the practical automatic control.
- Published
- 2018
33. 基于像素编码的大F数高分辨成像技术研究
- Author
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Liu Zhaohui, Chen Rong-li, Zhou Liang, Shan Qiusha, and Hao Wei
- Subjects
Pixel ,Computer science ,business.industry ,Computer vision ,Artificial intelligence ,Electrical and Electronic Engineering ,business ,High resolution imaging ,Atomic and Molecular Physics, and Optics ,Coding (social sciences) - Published
- 2021
34. Periodic nanostructures fabricated on GaAs surface by UV pulsed laser interference
- Author
-
Zhenwu Shi, Changsi Peng, Wei Zhang, Dayun Huo, Chen Rong, and Xiaoxiang Guo
- Subjects
Surface (mathematics) ,Materials science ,Oxide ,General Physics and Astronomy ,02 engineering and technology ,Substrate (electronics) ,01 natural sciences ,Condensed Matter::Materials Science ,chemistry.chemical_compound ,Optics ,Interference (communication) ,0103 physical sciences ,Wafer ,010302 applied physics ,business.industry ,Surfaces and Interfaces ,General Chemistry ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Periodic nanostructures ,Surfaces, Coatings and Films ,chemistry ,Optoelectronics ,Heat equation ,0210 nano-technology ,business ,Layer (electronics) - Abstract
In this paper, periodic nanostructures were fabricated on GaAs wafers by four-beam UV pulsed laser interference patterning. Significant different results were observed on epi-ready and homo-epitaxial GaAs substrate surfaces, which suggests GaAs oxide layer has an important effect on pulsed laser irradiation process. In the case of two-pulse patterning, a noticeable morphology transformation induced by the second pulse was observed on homo-epitaxial GaAs substrate. Based on photo-thermal mode, temperature distribution on sample surface as a function of time and position was calculated by solving the heat diffusion equations.
- Published
- 2016
35. GIS vibration fault simulation experiment and analysis
- Author
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Li Zhang, Qu Bin, Li Guohao, Ruiqin Geng, Zhiyong Gan, He Jin, and Chen Rong
- Subjects
Vibration ,History ,business.industry ,Structural engineering ,Fault (power engineering) ,business ,Geology ,Computer Science Applications ,Education - Abstract
In order to provide some theoretical and technical basis for the vibration test and analysis of GIS, this paper introduces two vibration fault simulation experiments of GIS. One is the simulation experiment of spike discharge, the other is the simulation experiment of flange bolt loosening. It includes both discharge fault and mechanical fault. The experiment shows that the vibration signal can reflect the discharge fault and mechanical fault well, and show different characteristics, which is very instructive for the field application of GIS vibration test.
- Published
- 2020
36. Economic analysis of thermal power units operating under unconventional conditions
- Author
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Di Cui, Chen Rong, Dong Fang, Ziyang Liu, Wang Shunjiang, and Ge Weichun
- Subjects
History ,Wind power ,Power station ,business.industry ,Scheduling (production processes) ,Thermal power station ,Energy consumption ,Automotive engineering ,Computer Science Applications ,Education ,Nameplate capacity ,Photovoltaics ,Peaking power plant ,Environmental science ,business - Abstract
In the case of deep peak shaving of thermal power units, it can absorb more photovoltaics and wind power, and also reduce the efficiency of thermal power plants and increase the environmental cost of society. This paper analyses the thermal power units under unconventional conditions from several influencing factors. The economics of operation, and innovative consideration of the current on-grid price and the latest government peaking subsidy factor. Firstly, according to the operating state and energy consumption characteristics of thermal power units, the peaking process is divided into conventional peaking, no oil depth adjustment and oil injection depth peaking, and the main factors affecting the deep peaking capacity of thermal power plants are analysed. The peaking energy cost model of thermal power units at different stages, and the actual power plant as the research object, the simulation results under different scheduling strategies are given. The results show that it is the most economical to increase the peaking depth of the unit to 54% of the rated capacity. The research results will provide a reference for better consumption of new energy.
- Published
- 2020
37. Engineering Character Recognition Algorithm and Application Based on BP Neural Network
- Author
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Chen Rong and Yu Luqian
- Subjects
Artificial neural network ,business.industry ,Computer science ,Noise reduction ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,020206 networking & telecommunications ,02 engineering and technology ,Software ,0202 electrical engineering, electronic engineering, information engineering ,Preprocessor ,Dilation (morphology) ,020201 artificial intelligence & image processing ,Segmentation ,Zoom ,business ,Algorithm ,Character recognition - Abstract
Character recognition algorithm can directly affect the accuracy and speed of character recognition. This algorithm uses BP neural network to train samples, preserve neural network weights, and recognize photographed images. The software algorithm integrates image-processing and neural network modules. Image-processing modules include pre-treatment processes, such as, binaryzation, denoising, dilation, erosion, rotation and character segmentation and extraction of images collected by cameras. Neural network modules include network training, identification, display, saving, loading, and other modules, such as image preprocessing and recognition. A prototype of online engineering character recognition system has been developed. Test results indicate that the duration of a single picture is approximately 100 ms, and the detection time displayed by the interface includes the zooming time of display interface that is approximately 200 ms.
- Published
- 2018
38. Study on the optical system of LED taxiway centreline light
- Author
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Yuyan Man, Xiaoli Zhou, Yan Wei, Zhengzheng Meng, Zhang Chi, Chen Rong, and Wei Jufang
- Subjects
Engineering ,Power consumption ,business.industry ,law ,Forensic engineering ,Structural reliability ,Electrical and Electronic Engineering ,business ,Automotive engineering ,Diode ,Light-emitting diode ,law.invention - Abstract
Light emitting diodes (LEDs) are very suitable candidates for using in airfield lighting due to the high efficiency, long lifetime and good monochromaticity. In this paper, an optical system is designed for LED taxiway centreline light, a combined modelling and experiment is carried out to show the designed system can meet the performance requirements of taxiway centreline light. This system has several advantages, compared with traditional light sources, such as structural reliability, long lifetime and low power consumption.
- Published
- 2015
39. Cushioning and Energy Absorbing Property of Combined Aluminum Honeycomb
- Author
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Chen Rong, Yuliang Lin, Zhifeng Zhang, Fang-Yun Lu, Xuejun Wen, and Yan Li
- Subjects
Insert (composites) ,Materials science ,business.industry ,Cushioning ,chemistry.chemical_element ,Structural engineering ,Condensed Matter Physics ,Buffer (optical fiber) ,Stress (mechanics) ,Honeycomb structure ,chemistry ,Aluminium ,Honeycomb ,Cylinder ,General Materials Science ,Composite material ,business - Abstract
Aluminum honeycomb is a good energy-absorption material because of its high strength and low density. To estimate the buffering and energy absorbing capacity of aluminum honeycomb, we designed and tested a cylindrical cushioning structure with two types of aluminum honeycomb. In the experiments, the out-of-plane crushing behavior of aluminum honeycombs was investigated on three types of samples including single honeycomb sample, stacked samples with two honeycombs, and three honeycombs at a fixed quasi-static loading condition. The results show that the energy-absorbing capacity of combined honeycomb sample is slightly better than that of the single honeycomb sample with the same total thickness in the concerned range. However, the collapse stress will significantly increase when two specimens with approximately the same thickness insert into each other completely, which should be avoided in the cushioning design. The design of combined honeycomb consisted of three stacked honeycombs can obtain a relatively smooth stress state, which is beneficial to protect the cylinder. As a result, one can draw a conclusion that combined honeycomb buffer consisted of multi-layered honeycomb samples should be given priority in the optimization design of aluminum honeycomb buffer.
- Published
- 2015
40. The effect of (1 1 0) strain on the energy band structure and optical properties of the simple orthorhombic Ca2P0.25Si0.75 bulk
- Author
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Yao Juan, Cen Wei-Fu, Fan Meng-Hui, Wang Zhengwei, Chen Rong, and Yang Yinye
- Subjects
Materials science ,Strain (chemistry) ,business.industry ,Band gap ,Mechanical Engineering ,Metals and Alloys ,Analytical chemistry ,Photoelectric effect ,Metal ,Crystallography ,Semiconductor ,Mechanics of Materials ,visual_art ,Materials Chemistry ,visual_art.visual_art_medium ,First principle ,Orthorhombic crystal system ,business ,Electronic band structure - Abstract
The energy band structure and optical properties of the (1 1 0) strain Ca 2 P 0.25 Si 0.75 have been calculated by the first-principle pseudo-potential method. The results show that the simple orthorhombic Ca 2 P 0.25 Si 0.75 bulk is a direct semiconductor and the band gap value increased with increasing of strain in the range of 100–104%, but it is decreased with increasing of strain in the range of 104–120% and 88–100%. Simple orthorhombic Ca 2 P 0.25 Si 0.75 bulk is turned to metal with exceeding of the compressive strain 88%. The optical properties have a significant changed by straining. So straining is a useful method for modulating the photoelectric transmission property of the simple orthorhombic Ca 2 P 0.25 Si 0.75 bulk.
- Published
- 2015
41. Water reuse system in Xi'an Municipality of China
- Author
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Chen Rong, Yanzheng Liu, and Xiaochang C. Wang
- Subjects
Engineering ,business.industry ,Environmental engineering ,Water supply ,Filtration and Separation ,Reuse ,Metropolitan area ,Reclaimed water ,Water scarcity ,Agriculture ,Urban planning ,Urbanization ,Water resource management ,business ,Water Science and Technology - Abstract
A water reuse system was formulated for the Xi'an International Metropolitan Urban Planning Project, with the aim of mitigating water stress in the central city of Xi'an, China in 2020. The main reuse purposes of the reclaimed water were agriculture, industry, municipal, ecological, and indoor uses. A wastewater reuse potential capacity of 427.2 × 106 m3/yr was deduced by analyzing the water demand for the different reuse purposes. This reuse capacity makes significant contribution to increasing the total urban water supply capacity and mitigating the water shortage problems imposed by the process of urbanization. A supply scheme for the reclaimed water was configured, which comprised the reclaimed water sources, water supply service areas, and the main reuse purposes. As a result, a wastewater treatment plants (WWTPs)-centered reclaimed water supply system was formed, and the main reuse purposes of the 15 WWTPs and their service districts were defined. Through an economic analysis, the feasibility and benefits of the water reuse system were ascertained. Overall, this study provided the theoretical basis and implementation strategies for a system configuration of water reuse in Xi'an City and also contributed to solving the water-deficiency problems associated with the rapidly developing urban areas in China.
- Published
- 2015
42. Zoom tracking for big magnification surveillance
- Author
-
Lin Zhong, Huang Chen-rong, and Lu A-li
- Subjects
business.industry ,Computer science ,Magnification ,Computer vision ,Artificial intelligence ,Zoom ,Tracking (particle physics) ,business ,Atomic and Molecular Physics, and Optics - Published
- 2015
43. Advances and Researches in Idiopathic Nephrotic Syndrome Biomarkers
- Author
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Li Wenyan, Chen Rong, Wang Yuanyuan, and Gao Jian
- Subjects
Urogynecology ,Menopause ,Pediatrics ,medicine.medical_specialty ,business.industry ,Medicine ,Maternal health ,General Medicine ,Prenatal care ,business ,medicine.disease ,Idiopathic Nephrotic Syndrome ,Mental health - Published
- 2017
44. PepperHub, an Informatics Hub for the Chili Pepper Research Community
- Author
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Lijun Ou, Huadong Li, Zhou Shudong, Dai Xiongze, Feng Liu, Bo Ouyang, Bozhi Yang, Ma Yanqing, Minglei Liu, Chen Wenchao, Zhang Zhuqing, Chen Rong, Feng Li, Yang Sha, Li Xuefeng, Huiyang Yu, Shengyu Feng, Zou Xuexiao, Minmin Liu, Yingtian Deng, Zheng Jingyuan, Ruimin Wei, and Shuang He
- Subjects
0106 biological sciences ,0301 basic medicine ,Internet ,business.industry ,Chili pepper ,MEDLINE ,Library science ,Computational Biology ,Plant Science ,Biology ,01 natural sciences ,03 medical and health sciences ,030104 developmental biology ,Informatics ,Research community ,Botany ,The Internet ,Capsaicin ,business ,Capsicum ,Molecular Biology ,010606 plant biology & botany - Published
- 2017
45. Wort composition and its impact on the flavour-active higher alcohol and ester formation of beer - a review
- Author
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Liu Jia, Peng Chen, Hou Xiaoping, Chen Lu, He Yang, Zhao Yuxiang, Wan Xiujuan, Dong Jianjun, Chen Rong, and Yin Hua
- Subjects
biology ,business.industry ,Flavour ,food and beverages ,Alcohol ,biology.organism_classification ,Yeast ,chemistry.chemical_compound ,chemistry ,Brewing ,Fermentation ,Composition (visual arts) ,Food science ,business ,Aroma ,Food Science - Abstract
The most significant factors influencing beer quality are the variety of aroma flavours that stem from a complex system of interactions between many hundreds of compounds. With increasing demand for flavour control and enhanced productivity, the presence of consistent and balanced amounts of higher alcohols and esters are critical aspects of process control. Extensive research has focused on the formation of flavour compounds by the brewing yeast and the factors that influence their synthesis. Fermenting wort is a complex medium from which the brewing yeast utilizes nutrients for living and growth and to where it places its metabolic by-products. Thus, changes in wort composition will greatly influence final beer aroma. The current paper reviews up-to-date knowledge on the contribution of wort composition to the flavour quality of the final product, in particular higher alcohols and esters. Different wort constituents involved in the biosynthesis of these aromatic substances, and which therefore require control during brewery fermentations, are reviewed. Copyright © 2014 The Institute of Brewing & Distilling
- Published
- 2014
46. Industrial Robot Kinematics Parameter Identification
- Author
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Chen Rong Liu, Yong Gui Zhang, and Peng Liu
- Subjects
Robot kinematics ,Engineering ,Inverse kinematics ,Robot calibration ,business.industry ,General Engineering ,Kinematics ,law.invention ,Computer Science::Robotics ,Industrial robot ,Kinematics equations ,law ,Control theory ,Robot ,Cartesian coordinate system ,business - Abstract
For an industrial robots with unknown parameters, on the basis of preliminary measurement and data of the Cartesian and joints coordinates which are shown on the FlexPendant, the kinematic parameters is identified by using genetic algorithms and accurate kinematics modeling of the robot is established. Experimental data could prove the validity of this method.
- Published
- 2014
47. Finite element analysis of a bone healing model: 1-year follow-up after internal fixation surgery for femoral fracture
- Author
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Yan Ya-Bo, Zhao Min, Du Cheng-Fei, Zhou Jiang-Jun, Lei Wei, Yu Wei-Tao, Zhu Zhi-Yu, Chen Rong-Jian, and Lv Ren-Fa
- Subjects
Femur fracture ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Finite element analysis ,General Medicine ,Bone healing ,Femoral fracture ,medicine.disease ,law.invention ,Surgery ,Intramedullary rod ,Fixation (surgical) ,law ,Intramedullary pin ,medicine ,Internal fixation ,von Mises yield criterion ,Femur ,Original Article ,Biomechanics ,business ,Bone healing model - Abstract
Objective: Finite element analysis was used to compare preoperative and postoperative stress distribution of a bone healing model of femur fracture, to identify whether broken ends of fractured bone would break or not after fixation dislodgement one year after intramedullary nailing. Method s: Using fast, personalized imaging, bone healing models of femur fracture were constructed based on data from multi-slice spiral computed tomography using Mimics, Geomagic Studio, and Abaqus software packages. The intramedullary pin was removed by Boolean operations before fixation was dislodged. Loads were applied on each model to simulate a person standing on one leg. The von Mises stress distribution, maximum stress, and its location was observed. Results : According to 10 kinds of display groups based on material assignment, the nodes of maximum and minimum von Mises stress were the same before and after dislodgement, and all nodes of maximum von Mises stress were outside the fracture line. The maximum von Mises stress node was situated at the bottom quarter of the femur. The von Mises stress distribution was identical before and after surgery. Conclusion : Fast, personalized model establishment can simulate fixation dislodgement before operation, and personalized finite element analysis was performed to successfully predict whether nail dislodgement would disrupt femur fracture or not.
- Published
- 2014
48. Ethnopharmacology, phytochemistry, and pharmacology of Cornus officinalis Sieb. et Zucc
- Author
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Lin Dong, Qinghan Gao, Yiwei Zhang, Lei Yin, Huang Jun, Xueyan Fu, Chen Rong, Dingbo Lin, and Hongfeng Quan
- Subjects
0301 basic medicine ,food.ingredient ,medicine.risk_factor ,Phytochemistry ,Astringent ,Traditional Chinese medicine ,Pharmacology ,03 medical and health sciences ,0302 clinical medicine ,food ,Cornus ,Drug Discovery ,medicine ,Animals ,Humans ,Hypoglycemic Agents ,biology ,business.industry ,Cornus officinalis ,biology.organism_classification ,Spermatorrhea ,030104 developmental biology ,Phytochemical ,030220 oncology & carcinogenesis ,Herb ,Officinalis ,Ethnopharmacology ,business ,Drugs, Chinese Herbal - Abstract
Ethnopharmacological relevance Cornus officinalis (Cornaceae), known in Chinese as “Shanzhuyu,” is a frequently used traditional Chinese medicine. It tastes sour and is astringent and slightly warm in nature. Its fruits have long been used to treat kidney deficiency, high blood pressure, waist and knee pain, dizziness, tinnitus, impotence, spermatorrhea, menorrhagia, and other diseases in China. The main distribution areas are Shanxi and Gansu. Aim of the study This review focused on the ethnopharmacological uses of the herb. We also focus on the phytochemical, pharmacological, and toxicological studies on C. officinalis. The recent analytical methods developed for the quality control of the herb’s constituents are also reviewed. Additionally, future trends and prospects in the study of this herb are proposed. Materials and methods Information on C. officinalis was gathered by searching the internet (PubMed, ScienceDirect, Wiley, ACS, CNKI, Scifinder, Web of Science, Google Scholar, and Baidu Scholar) and libraries. Results This review compiled the ethnopharmacological uses, including the classic prescriptions and historical applications. Approximately 300 chemical compounds have been isolated and identified from C. officinalis. The major active components of the plant are organic acids and iridoids, among which morroniside and loganin have been extensively investigated. The fruit of the plant has been used in treating many diseases in traditional medicine. Scientific studies indicated the herb’s wide range of pharmacological activities, such as hepatic and renal protection, antidiabetes activity, cardioprotection, antioxidation, neuroprotection, antitumor activity, anti-inflammation, analgesic effects, antiaging activity, antiamnesia, antiosteoporosis, and immunoregulation. The analytical methods developed for the quantitative and qualitative determination of various compounds in the herb were further reviewed. Conclusions In this paper, we reviewed various studies conducted on C. officinalis, especially in areas of its ethnopharmacological use, as well as on its phytochemistry, pharmacology, and modern analytical methods used. Some of the herb’s ethnomedical indications have been confirmed by the herb’s pharmacological effects, such as its hepatic and renal protection and the antidiabetic effects. In particular, the crude extract and its chemical composition have exerted good therapeutic effect in diabetic treatment. C. officinalis entails additional attention on its pharmacological effects and drug development to expand its effective use clinically. Many advanced technologies are used for quality testing, but the detection component is exceedingly scarce for synthetically evaluating the quality of C. officinalis herbs. Thus, further research is necessary to investigate the quality control and toxicology of the plant, to further elucidate its clinical use, and to control herbal quality.
- Published
- 2016
49. Theoretical investigation on heat-electricity decoupling technology of low-pressure steam turbine renovation for CHPs
- Author
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Li Guohao, Chen Rong, Li Zhang, Liansheng Zhou, Shan Wang, Zhang Yu, Hu Qingbo, and Wang Kun
- Subjects
Computer science ,business.industry ,Steam turbine ,Nuclear engineering ,Electricity ,business ,Decoupling (electronics) - Published
- 2019
50. Research on Rapid Interactive Top-Level Design Support Environment for Complex System of Systems
- Author
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Chen Rong
- Subjects
Engineering ,Emulation ,business.industry ,General Engineering ,Complex system ,Cloud computing ,Level design ,Visualization ,Systems engineering ,Design process ,Engineering design process ,business ,Software engineering ,System integration testing - Abstract
The Safety City of the Internet of Things (SCIOT) is a kind of multi-level, multi-service, polymorphic and multi-mechanism complex system of systems. The SCIOT system is so complex that the risk of system development is high. Thus, it is necessary to take measures to reduce the risk. This paper proposed a Rapid Interactive top-level Design & Demonstration Environment (RID2E) for the risk reducing of this kind of complex system of systems. RID2E adopts a feedback-based top-level design method which divided the design process into six sub-processes consisting of top-level design, rapid prototype development, system integration test, system simulation & emulation, visualization demonstration and sequential feedback. RID2E provided a platform that can achieve cooperative top-level design, full dimensions simulation &emulation, interactive demonstration, systematization display and sequential feedback for SCIOT system. As a typical design process, an emergency command and control system was constructed quickly and effectively based on the RID2E and it proves the method is feasible.
- Published
- 2013
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