Search

Your search keyword '"WANG Jin-hai"' showing total 212 results
Start Over Author "WANG Jin-hai"
212 results on '"WANG Jin-hai"'

1. Influence of scanning strategy on printing quality and properties of selective laser melted 18Ni300 maraging steel

Author

ZHANG Jia-qi, WANG Min-jie, LIU Jian-ye, NIU Liu-hui, and WANG Jin-hai

Subjects
selective laser melting, scanning strategy, 18ni300 maraging steel, printing quality, partition scan, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

In order to study the influence of scanning strategy on the printing quality and properties of the formed parts,unidirectional scanning along one axis (X-scan),unidirectional scanning with 90° rotation in each layer (XY-scan),strip partition scanning strategy with direction changes in each layer (S-scan), checkerboard partition scanning strategy with direction changes in each layer (C-scan) were chosen to print 18Ni300 maraging steel by selective laser melting (SLM) process.The effects of different scanning strategies on the surface morphology, relative density,microstructure and mechanical properties of printed parts were studied systematically. The anisotropy of tensile properties of different scanning strategies in different forming directions was analyzed. The results show that the print quality and properties of the partition scanning strategies are better than that of X scanning strategy and XY scanning strategy. The reason is that during the printing process, the partition scanning strategy can divide each layer of laser scanning into multiple areas for printing, which improves the condensing rate for each layer. Compared with X scanning strategy and XY scanning strategy, the scanning direction of the partition scanning strategy changes periodically, which not only helps to fill the bulge and lap gap of the upper layer, but also reduces the heat accumulation and improves the performance of the sample.

Published
2020
Full Text
View/download PDF

2. Remote Update System of ARM Software Based on TFTP

Author

LI Jun and WANG Jin-hai

Subjects
embedded micro-controller, arm, remote update, ethernet, tftp, bootloader, nor flash programming, Mining engineering. Metallurgy, TN1-997
Abstract

In order to resolve problems of maintenance and upgrade of embedded products in unattended area,a design scheme of remote update system of ARM software based on TFTP protocol was proposed.The system is mainly composed of LPC2290 micro-controller,DM9000E network card chip,SST39VF1601 NOR FLASH and MT45W4MW16 RAM.It can remotely update application software of ARM micro-controller without operating system by use of bootloader technology and TFTP protocol of Ethernet.The testing result showed that the system can ensure correct transmission and storage of data,and reduce difficulty of upgrade and maintenance of ARM embedded system software greatly.

Published
2010

5. Synergistic Effects of Matrix Biophysical Properties on Gastric Cancer Cell Behavior via Integrin‐Mediated Cell‐ECM Interactions

Author

Xiao, Cailan, primary, Xie, Ning, additional, Shu, Qiuai, additional, Liang, Xiru, additional, Wang, Ziwei, additional, Wu, Jian, additional, Shi, Nianyuan, additional, Huang, Xindi, additional, Wei, Zhong‐Cao, additional, Gao, Xiaoliang, additional, Liu, Hao, additional, Wu, Kaichun, additional, Xu, Jingyuan, additional, Wang, Jin‐Hai, additional, Liu, Na, additional, and Xu, Feng, additional

Published
2024
Full Text
View/download PDF

8. Progression of Gastrointestinal Injury During Antiplatelet Therapy After Percutaneous Coronary Intervention

Author

He, Chen, primary, Li, Yi, additional, Jiang, Xi, additional, Jiang, Meng-Ni, additional, Zhao, Xian-Xian, additional, Ma, Shu-Ren, additional, Bao, Dan, additional, Qiu, Miao-Han, additional, Deng, Jie, additional, Wang, Jin-Hai, additional, Qu, Peng, additional, Jiang, Chun-Meng, additional, Jia, Shao-Bin, additional, Yang, Shao-Qi, additional, Ru, Lei-Sheng, additional, Feng, Jia, additional, Gao, Wei, additional, Huang, Yong-Hui, additional, Tao, Ling, additional, Han, Ying, additional, Yang, Kan, additional, Wang, Xiao-Yan, additional, Zhang, Wen-Juan, additional, Wang, Bang-Mao, additional, Li, Yue, additional, Yang, You-Lin, additional, Li, Jun-Xia, additional, Sheng, Jian-Qiu, additional, Ma, Yi-Tong, additional, Cui, Min, additional, Ma, Si-Cong, additional, Wang, Xiao-Zeng, additional, Li, Zhao-Shen, additional, Liao, Zhuan, additional, Han, Ya-Ling, additional, and Stone, Gregg W., additional

Published
2023
Full Text
View/download PDF

12. High-fat diet aggravates colitis via mesenteric adipose tissue derived exosome metastasis-associated lung adenocarcinoma transcript 1

Author

Chen, Dong, primary, Lu, Miao-Miao, additional, Wang, Jin-Hai, additional, Ren, Yue, additional, Xu, Ling-Ling, additional, Cheng, Wei-Xin, additional, Wang, Sai-Sai, additional, Li, Xiao-Lin, additional, Cheng, Xiao-Fei, additional, Gao, Jian-Guo, additional, Kalyani, Farhin Shaheed, additional, and Jin, Xi, additional

Published
2022
Full Text
View/download PDF

15. An Effective Method for Distinguishing Sleep Apnea and Hypopnea Based on ECG Signals

Author

Xiaoyun Zhao, Siyu Ji, Yao Wang, Tianshun Yang, Xiaohong Wang, Wang Jin-hai, and Huiquan Wang

Subjects
medicine.medical_specialty, General Computer Science, Central apnea, 02 engineering and technology, Electroencephalography, multi-scale entropy, 03 medical and health sciences, QRS complex, 0302 clinical medicine, Internal medicine, 0202 electrical engineering, electronic engineering, information engineering, Medicine, General Materials Science, hypopnea, Sleep Stages, medicine.diagnostic_test, business.industry, Sleep apnea, General Engineering, Apnea, Heart rate variability analysis, medicine.disease, TK1-9971, respiratory tract diseases, Cardiology, 020201 artificial intelligence & image processing, Electrical engineering. Electronics. Nuclear engineering, medicine.symptom, complexity, business, Hypopnea, Electrocardiography, 030217 neurology & neurosurgery
Abstract

Good sleep quality is essential to our life and work. The two major challenges in evaluating sleep quality are the scoring of sleep stages and sleep apnea detection. In addition to sleep apnea, hypopnea is also a respiratory event that occurs at an equal or even higher frequency compared to that of apnea. However, the two phenomena are not only different in terms of physical manifestation, there are also significant differences in the methods and means of clinical treatment. Therefore, in this study we propose an effective algorithm to distinguish between hypopnea and apnea events. We consider two aspects of feature extraction. On the one hand, from the original time-domain waveform of electrocardiogram signals, we extract the time difference sequence between the appearance of the R-R wave in two adjacent QRS waves (RR intervals) and explore the way they change when apnea and hypopnea event occur. On the other hand, considering that the degree of sequence disorder caused by hypopnea and apnea events is different, multi-scale entropy and complexity are chosen as the features that describe this change. The results obtained using the proposed algorithm show that the classification between hypopnea events and any type of apnea events all reach an accuracy rate greater than 90%. For obstructive apnea events, which occur most frequently among the three different types of apneas, the classification accuracy, sensitivity, specificity and F1-score were 91.78%, 92.21%, 91.30%, 92.20%, respectively. The classification results between central apnea events and hypopnea events reached an accuracy of 93.18%, sensitivity of 95.00%, specificity of 91.67% and F1-score of 92.68%. At the same time, the algorithm achieved an accuracy of 92.59%, sensitivity of 90.38%, specificity of 94.64% and F1-score of 92.16% when classifying mixed apnea and hypopnea events. In the classification of normal breathing, hypopnea events and apnea events, the total accuracy rate achieved was 91.92%, with that for normal breathing reaching 93.62%, for hypopnea events reaching 90.39%, and 91.91% for apnea events, with a Kappa coefficient of 0.99. The algorithm proposed in this study constitutes an efficient and convenient approach for apnea and hypopnea event detection and classification.

Published
2021
Full Text
View/download PDF

26. An enzyme switch employing direct electrochemical communication between horseradish peroxidase and a poly(aniline) film

Author

Bartlett, Philip N., Birkin, Peter R., Wang, Jin Hai, Palmisano, Francesco, and Benedetto, Giuseppe de

Subjects
Enzymes -- Analysis, Electrochemical analysis -- Methods, Peroxidase -- Analysis, Electrodes -- Usage, Hydrogen peroxide -- Analysis, Switches -- Usage, Chemistry
Abstract

An enzyme switch, or microelectrochemical enzyme transistor, responsive to hydrogen peroxide was made by connecting two carbon band electrodes ([approximately]10 [[micro]meter] wide, 4.5 mm long separated by a 20-[[micro]meter] gap) with an anodically grown film of poly(aniline). Horseradish peroxidase (EC 1.11.1.7) was either adsorbed onto the poly(aniline) film or immobilized in an insulating poly(1,2-diaminobenzene) polymer grown electrochemically on top of the poly(aniline) film to complete the device. In the completed device, the conductivity of the poly(aniline) film changes from conducting (between - 0.05 and + 0.3 V vs SCE at pH 5) to insulating (> +0.3 V vs SCE at pH 5) on addition of hydrogen peroxide. The change in conductivity is brought about by oxidation of the poly(aniline) film by direct electrochemical communication between the enzyme and the conducting polymer. This was confirmed by measuring the potential of the poly(aniline) film during switching of the conductivity in the presence of hydrogen peroxide. The devices can be reused by rereducing the poly(aniline) electrochemically to a potential below +0.3 V vs SCE. A blind test showed that the device can be used to determine unknown concentrations of [H.sub.2][O.sub.2] in solution and that, when used with hydrogen peroxide concentrations below 0.5 mmol [dm.sup.-3], the same device maybe reused several times. The possible development of devices of this type for use in applications requiring the measurement of low levels of hydrogen peroxide or horseradish peroxidase is discussed.

Published
1998

37. Image reconstruction in respiratory monitoring based on the anatomical information for magnetic detection electrical impedance tomography

Author

Li Guang-xu, Yin Jian-li, Wang Jin-hai, Feng Yan-bo, Wang Huiquan, and Chen Rui-juan

Subjects
Materials science, business.industry, Acoustics, 0206 medical engineering, 030208 emergency & critical care medicine, 02 engineering and technology, Iterative reconstruction, Respiratory monitoring, 020601 biomedical engineering, Intensity (physics), Electromagnetic induction, Magnetic field, 03 medical and health sciences, 0302 clinical medicine, Computer vision, Tomography, Artificial intelligence, business, human activities, Electrical impedance, Electrical impedance tomography
Abstract

In order to improve the resolution of electrical impedance tomography, magnetic detection electrical impedance tomography is proposed to monitor human respiration noninvasively with high resolution. By injecting certain current with low frequency into the imaging object, the distribution of magnetic flux density around the object is calculated by finite element method and Biot-Savart's law. Aiming at the forward problem of magnetic detection electrical impedance tomography we calculated the electric potential and current density distribution inside the physical model based on the anatomical information of the human lung, which are obtained by threshold segmentation, morphological operation and seed filling from real CT data of human lungs, and we get magnetic induction intensity outside the object when exhaling and inhaling according to Biot-Savart's law, then different distribution images are obtained. The results show that the magnetic induction intensity when inhaling is 8.875% greater than that when exhaling. By simulation results, we can better understand the difference of magnetic induction intensity value surrounding the lung when exhaling and inhaling due to the change of lung volume and electrical conductivity distribution, laying the foundation for the image reconstruction and clinical disease detection.

Published
2016
Full Text
View/download PDF

45. Tumor-associated autoantibodies are useful biomarkers in immunodiagnosis of α-fetoprotein-negative hepatocellular carcinoma

Author

Wang, Ting, primary, Liu, Mei, additional, Zheng, Su-Jun, additional, Bian, Dan-Dan, additional, Zhang, Jin-Yan, additional, Yao, Jia, additional, Zheng, Qing-Fen, additional, Shi, A-Meng, additional, Li, Wen-Han, additional, Li, Lu, additional, Chen, Yu, additional, Wang, Jin-Hai, additional, Duan, Zhong-Ping, additional, and Dong, Lei, additional

Published
2017
Full Text
View/download PDF

48. Intelligent Home System Based on WIFI

Author

Wang Jin-hai and Zhang Yu-han

Subjects
business.industry, law, Computer science, Power consumption, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Control (management), Network structure, General Packet Radio Service, business, Remote control, Computer network, Electronic circuit, law.invention
Abstract

In this paper, we have designed an Intelligent Home System Based on WIFI. We use IEEE802.11/WIFI standards and the GPRS network to manage the family internal network. We mainly talk about the network structure, the design of nodes and remote control of GPRS network. The system which is less peripheral circuits, small power consumption, easy to control and low cost, can be widely used in ordinary households.

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results