426 results on '"JIAO JIANG"'
Search Results
202. Research on impact of team conflict upon employee satisfaction in geographically distributed software development team
- Author
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Zong-yu Wang, Ji-jiao Jiang, and Ming Yin
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Team composition ,Knowledge management ,business.industry ,Process (engineering) ,05 social sciences ,Applied psychology ,Team effectiveness ,Cognition ,Electronic mail ,Task (project management) ,0502 economics and business ,050211 marketing ,Emotional conflict ,Job satisfaction ,business ,Psychology ,050203 business & management - Abstract
To find the relation between conflict and employee satisfaction in geographically distributed software development (GDD) team, study the characters of GDD team and put forward four types of team conflict: emotional conflict, task conflict, cognitive conflict, and process conflict. Besides, bring in team interaction as an influencing factor of team conflict. Then come up with hypotheses about the impact of team conflict on employee satisfaction. And use collected data to carry out regression analyze. The results show that emotional, task and cognitive conflict all have significant influence on employee satisfaction, instead of process conflict. And emotional conflict and task conflict can change with team interaction. The results can provide some help with handling conflict more efficient and improving the employee satisfaction in GDD team.
- Published
- 2017
203. Research on the Industry Integration of Culture Industry and Tourism in Shannxi Area
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Yan-Mei Zhang, Chang Liu, Yan-Chao Kang, and Ji-Jiao Jiang
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Engineering ,Index (economics) ,business.industry ,Economic geography ,business ,Constructive ,Culture industry ,Tourism - Abstract
This paper first states the characteristics of culture industry and tourism industry then establish the evaluation index for evaluating the development level of these two industries. Take the Shannxi area as an example, we analyze the development level of culture industry and tourism industry and the integration of the two in 11 cities in 2010-2014. The results show that the development level of culture industry and tourism industry in Shannxi area is increasing year by year, but the whole development level of two kinds of industry is low, and the difference of the two kinds of industry integration in different places is great. Moreover, the coupling degree in urban is generally in the verge of disorder and barely imbalance. Based on this, the paper suggests some constructive proposals to promote industrial development.
- Published
- 2017
204. Division of Area of Fixation Interest for Real Vehicle Driving Tests
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Tangyi Guo, Xue-jiao Jiang, Qian Xu, and Fei Shao
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Engineering ,Article Subject ,General Mathematics ,02 engineering and technology ,0502 economics and business ,0202 electrical engineering, electronic engineering, information engineering ,Computer vision ,Mean-shift ,Cluster analysis ,Simulation ,050210 logistics & transportation ,Eye tracking on the ISS ,business.industry ,lcsh:Mathematics ,05 social sciences ,General Engineering ,Division (mathematics) ,lcsh:QA1-939 ,Geographic coordinate conversion ,lcsh:TA1-2040 ,Fixation (visual) ,Eye tracking ,Affinity propagation ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,lcsh:Engineering (General). Civil engineering (General) - Abstract
The area of interest (AOI) reflects the degree of attention of a driver while driving. The division of AOI is visual characteristic analysis required in both real vehicle tests and simulated driving scenarios. Some key eye tracking parameters and their transformations can only be obtained after the division of AOI. In this study, 9 experienced and 7 novice drivers participated in real vehicle driving tests. They were asked to drive along a freeway section and a highway section, wearing the Dikablis eye tracking device. On average, 8132 fixation points for each driver were extracted. After coordinate conversion, the MSAP (Mean Shift Affinity Propagation) method is proposed to classify the distribution of fixation points into a circle type and a rectangle type. Experienced drivers’ fixation behavior falls into the circle type, in which fixation points are concentrated. Novice drivers’ fixation points, which are decentralized, are illustrated in the rectangle type. In the clustering algorithm, the damping coefficient λ determines the algorithm convergence, and the deviation parameter p mainly affects the number of clusters, where larger p values generate more clusters. This study not only provides the cluster type and cluster counts, but also presents the borderlines for each cluster. The findings provide significant contribution to eye tracking research.
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- 2017
- Full Text
- View/download PDF
205. Electrical activation of hydrogen peroxide for organic contaminant degradation using an improved gas diffusion cathode
- Author
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Xue Sun, Haijian Luo, Chaolin Li, and Jiao Jiang
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chemistry.chemical_compound ,chemistry ,law ,Inorganic chemistry ,Phenol ,Gaseous diffusion ,Degradation (geology) ,Hydrogen peroxide ,Cathode ,law.invention - Published
- 2017
206. Atmospheric PBDEs at rural and urban sites in central China from 2010 to 2013: Residual levels, potential sources and human exposure
- Author
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Wen-Jing Wu, Chen Yang, Ze-Lin Bai, Qi-Shuang He, Fu-Liu Xu, Ning Qin, Wen-Xiu Liu, Bin Yang, Yu-Jiao Jiang, Xiang-Zhen Kong, Wei He, and Qing-Mei Wang
- Subjects
Rural Population ,Pollution ,China ,endocrine system ,Urban Population ,Health, Toxicology and Mutagenesis ,media_common.quotation_subject ,Central china ,Toxicology ,Human health ,Polybrominated diphenyl ethers ,Air Pollution ,Halogenated Diphenyl Ethers ,Humans ,reproductive and urinary physiology ,media_common ,Inhalation exposure ,Air Pollutants ,Inhalation Exposure ,Atmosphere ,General Medicine ,Particulates ,humanities ,Lakes ,Human exposure ,Environmental chemistry ,Environmental science ,Particulate Matter ,Seasons ,Rural area ,Environmental Monitoring - Abstract
Atmospheric polybrominated diphenyl ethers (PBDEs) were monitored monthly from 2010 to 2013 at rural and urban sites near a large shallow Chinese lake (Lake Chaohu). The urban areas had higher air PBDEs than the rural areas because of endogenic pollution. The highest and lowest concentrations of Σ13BDEs were observed in the winter and in the summer, respectively. A weak temperature dependence and significant positive correlations between certain PBDE congeners and the PM10 (p
- Published
- 2014
207. Delay-induced Bogdanov–Takens bifurcation in a Leslie–Gower predator–prey model with nonmonotonic functional response
- Author
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Yongli Song and Jiao Jiang
- Subjects
Numerical Analysis ,Mathematics::Dynamical Systems ,Applied Mathematics ,Mathematical analysis ,Saddle-node bifurcation ,Heteroclinic bifurcation ,Bifurcation diagram ,Biological applications of bifurcation theory ,Nonlinear Sciences::Chaotic Dynamics ,Transcritical bifurcation ,Modeling and Simulation ,Homoclinic bifurcation ,Bogdanov–Takens bifurcation ,Infinite-period bifurcation ,Nonlinear Sciences::Pattern Formation and Solitons ,Mathematics - Abstract
This work is concerned with the dynamics of a Leslie–Gower predator–prey model with nonmonotonic functional response near the Bogdanov–Takens bifurcation point. By analyzing the characteristic equation associated with the nonhyperbolic equilibrium, the critical value of the delay inducing the Bogdanov–Takens bifurcation is obtained. In this case, the dynamics near this nonhyperbolic equilibrium can be reduced to the study of the dynamics of the corresponding normal form restricted to the associated two-dimensional center manifold. The bifurcation diagram near the Bogdanov–Takens bifurcation point is drawn according to the obtained normal form. We show that the change of delay can result in heteroclinic orbit, homoclinic orbit and unstable limit cycle.
- Published
- 2014
208. Modeling the multimedia fate dynamics of γ-hexachlorocyclohexane in a large Chinese lake
- Author
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Ning Qin, Wei He, Qing-Mei Wang, Xiang-Zhen Kong, Hui-Ling Ouyang, Fu-Liu Xu, Chen Yang, Qi-Shuang He, Bin Yang, and Yu-Jiao Jiang
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Ecology ,Advection ,Monte Carlo method ,General Decision Sciences ,Sediment ,Markov chain Monte Carlo ,Soil science ,Seasonality ,medicine.disease ,symbols.namesake ,symbols ,medicine ,Environmental science ,Fugacity ,Sensitivity (control systems) ,Ecology, Evolution, Behavior and Systematics ,Uncertainty analysis - Abstract
Long-term annual dynamics from 1984 to 2020 (simulation #1) and seasonal variation from May 2010 to February 2011 (simulation #2) of γ-hexachlorocyclohexane (γ-HCH) in various environmental media in Lake Chaohu, China were simulated with an already developed fugacity-based level IV Quantitative Water Air Sediment Interaction (QWASI) model (Kong et al., 2012). The model was modified, as a fish sub-phase was included. Also the emission flux was added to study the impact of the lindane prohibition in simulation #1. Sensitivity analysis was conducted for both static and dynamic parameters, while in uncertainty analysis, both basic Monte Carlo and Bayesian Markov Chain Monte Carlo (MCMC) methods were undertaken for simulation #2 and the results were compared. Simulated data were consistent with the observations in simulation #1. Seasonal patterns in various media were also successfully modeled in simulation #2 and factors leading to this seasonality were discussed. Atmospheric advection input was the main source. In simulation #2, approximately 36 kilogram (kg) of γ-HCH in Lake Chaohu was removed per year. In addition, 31 kg of γ-HCH was added to Lake Chaohu by air–water interface fluxes, and 13 kg of γ-HCH was added to the sediment by water–sediment interface. Sensitivity of static and dynamic parameters was discussed. Uncertainty analysis by the basic Monte Carlo method for simulation #1 showed that the dispersion for each media was less than two orders of magnitude. Higher dispersions in fish and two sub-phases of the sediment were attributed to a larger variation in the relevant parameters. The MCMC method for simulation #2 eliminated 77% of the model true uncertainty in water ascertained by basic Monte Carlo method and significant elimination in other phases can be speculated. It is suggested that rather than calibrating the model, the main function of the MCMC for fugacity model should be to avoid overestimating uncertainty in model prediction.
- Published
- 2014
209. The seasonal and spatial variations of phytoplankton community and their correlation with environmental factors in a large eutrophic Chinese lake (Lake Chaohu)
- Author
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Qing-Mei Wang, Ning Qin, Qi-Shuang He, Wen-Xiu Liu, Fu-Liu Xu, Hui-Ling Ouyang, Chen Yang, Bin Yang, Yu-Jiao Jiang, Xiang-Zhen Kong, and Wei He
- Subjects
Ecology ,biology ,Anabaena circinalis ,General Decision Sciences ,Chlorophyta ,biology.organism_classification ,Canonical correspondence analysis ,Microcystis ,Environmental chemistry ,Phytoplankton ,Environmental science ,Water quality ,Eutrophication ,Ecology, Evolution, Behavior and Systematics ,Total suspended solids - Abstract
The seasonal and spatial variations of phytoplankton community and their correlation with environmental factors, as well as the applicability of phytoplankton to serve as biological water quality indicator in Lake Chaohu are investigated in the present study. 97 phytoplankton species were identified, in which 35.1% of Cyanophyta and 37.1% of Chlorophyta. In terms of the community composition at the annual average level and the spatial distribution, Cyanophyta was absolutely dominant (more than 99.4% of the total). The main dominant species in Lake Chaohu were Microcystis viridis, Microcystis flos-aquae, and Anabaena circinalis, all belonging to Cyanophyta. The average phytoplankton cell density of the dominant species showed substantial seasonal differences. In Lake Chaohu, the M. flos-aquae was dominant in spring and summer; while the M. viridis and the A. circinalis were dominant in autumn and in winter, respectively. The canonical correspondence analysis (CCA) showed that the water temperature (T), oxidation reduction potential (ORP), dissolved oxygen (DO) and orthophosphate (PO43−-P) were the environmental factors having the greatest influence on the phytoplankton community composition in Lake Chaohu, whereas T, ORP, total suspended solids (TSS) and total nitrogen (TN) were the most important environmental factors in the inflow and outflow rivers. The average species number of phytoplankton was lowest, and the average cell density of phytoplankton was highest in summer, which corresponded to the worst water quality, as indicated by physical and chemical indicators, TSS, DO, chemical oxygen demand (COD) and total phosphorus (TP); while, in winter, the average species number of phytoplankton was largest, and the average cell density of phytoplankton was lowest, which corresponded to the best water quality, as indicated by TSS, DO, COD and TP. This implied that the species number and cell density of phytoplankton could serve as biological water quality indicators, which would give overall descriptions of water quality by combining with the physical and chemical indicators.
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- 2014
210. Water quality benchmarking (WQB) and priority control screening (PCS) of persistent toxic substances (PTSs) in China: Necessity, method and a case study
- Author
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Fu-Liu Xu, Ning Qin, Qi-Shuang He, Wen-Jing Wu, Xiang-Zhen Kong, Yu-Jiao Jiang, Wei He, Bin Yang, Qing-Mei Wang, Chen Yang, and Wen-Xiu Liu
- Subjects
Pollution ,China ,Environmental Engineering ,Aquatic ecosystem ,media_common.quotation_subject ,Environmental engineering ,Benchmarking ,Pesticide ,Environmental protection ,Water Quality ,Water Pollution, Chemical ,Water environment ,Environmental Chemistry ,Environmental science ,Predicted no-effect concentration ,Water quality ,Waste Management and Disposal ,Water Pollutants, Chemical ,Environmental Monitoring ,media_common - Abstract
The priority control screening (PCS) and water quality benchmarking (WQB) of toxic chemicals in water are key steps to ensure the safety of drinking water and aquatic ecosystem that is the crucial goal of water environment management. Owing to the different levels of social-economic development in different countries and regions, the PCS and WQB of toxic chemicals must be determined in accordance with their specific water environment situations. However, in China, the PCS and WQB of toxic chemicals in water were mainly introduced from the other countries. A method for the PCS and WQB of toxic chemicals in water based on the ecological risks was proposed, and a platform named Bayesian Matbugs Calculator (BMC) was developed. As a case study, the WQB and PCS of sixty-nine PTSs based their ecological risks were performed on the basis of one-year monthly monitoring in Lake Chaohu. The results showed that the current national water quality criteria (WQC) would underestimate the toxicological risk to organisms in this aquatic ecosystem. It appears necessary to develop new WQC for the protection of aquatic organisms in Lake Chaohu. Four grades of priority control chemicals (PCCs) in Lake Chaohu were proposed. The highest priority was assigned to organonitrogen-phosphorus pesticides, including parathion, dichlorvos, malathion, omethoate, and di-n-butyl phthalate. However, the national “blacklist” of toxic compounds only covered 7 of 20 PCCs, indicating that the other 13 PCCs would not be controlled efficiently. Because the pollution pattern of PTSs in various water bodies might be quite different, we appealed to the governments to screen the regional PPC lists or develop a more comprehensive national list for aquatic ecosystem protection in China.
- Published
- 2014
211. Web Data Source Selection Technologies
- Author
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Guo Qiong Liao, Xi Ping Liu, Chang Xuan Wan, De Xi Liu, Teng Jiao Jiang, and Song Deng
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Web analytics ,Web standards ,medicine.medical_specialty ,Information retrieval ,business.industry ,Computer science ,computer.software_genre ,medicine ,Relevance (information retrieval) ,business ,Web intelligence ,computer ,Web modeling ,Software ,Data Web ,Selection (genetic algorithm) ,Data integration - Abstract
In Web data integration,selecting data from a Web data source collection such that the specific query intents are satisfied while the number of accesses to data sources is minimized and the quality of returned results are guaranteed is a popular topic.In this paper,using the researches and practices in recent ten years as the background,the study focuses on the evolution and presents research in the area of Web data source selection and classifies Web data source selection methods.In addition,the paper discusses the research motivations,methods and results of relevance-based data source selection and quality-based data source selection.Moreover,the paper introduces the correlation research results and analyzes their destinations,key techniques,merits and demerits.Finally,some directions for future research are put forward.
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- 2014
212. Bifurcation Analysis and Spatiotemporal Patterns of Nonlinear Oscillations in a Ring Lattice of Identical Neurons with Delayed Coupling
- Author
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Yongli Song and Jiao Jiang
- Subjects
Computer Science::Machine Learning ,Hopf bifurcation ,Article Subject ,lcsh:Mathematics ,Applied Mathematics ,Mathematical analysis ,Saddle-node bifurcation ,lcsh:QA1-939 ,Bifurcation diagram ,Computer Science::Digital Libraries ,Biological applications of bifurcation theory ,Nonlinear Sciences::Chaotic Dynamics ,Statistics::Machine Learning ,symbols.namesake ,Pitchfork bifurcation ,Transcritical bifurcation ,Bifurcation theory ,Computer Science::Mathematical Software ,symbols ,Nonlinear Oscillations ,Nonlinear Sciences::Pattern Formation and Solitons ,Analysis ,Mathematics - Abstract
We investigate the dynamics of a delayed neural network model consisting ofnidentical neurons. We first analyze stability of the zero solution and then study the effect of time delay on the dynamics of the system. We also investigate the steady state bifurcations and their stability. The direction and stability of the Hopf bifurcation and the pitchfork bifurcation are analyzed by using the derived normal forms on center manifolds. Then, the spatiotemporal patterns of bifurcating periodic solutions are investigated by using the symmetric bifurcation theory, Lie group theory andS1-equivariant degree theory. Finally, two neural network models with four or seven neurons are used to verify our theoretical results.
- Published
- 2014
213. Hourly Variations and Potential Sources of Airborne Trace Elements in PM10 in Four Representative Regions of Southeastern China
- Author
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Dao-Zhu Hua, Hua-Jun Ye, Kai Yang, Shui-He Shi, Li-Li Niu, Xue-Jiao Jiang, and Dan Li
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Pollution ,Meteorology ,media_common.quotation_subject ,Trace element ,Particulates ,Atmospheric sciences ,Latitude ,Aerosol ,Industrial park ,Environmental Chemistry ,Environmental science ,China ,Global biodiversity ,media_common - Abstract
Aerosol pollution episodes have frequently occurred in China in recent years, and the airborne trace elements in particulate matter have been a cause for concern worldwide because of their impacts on human health. However, there is limited information on the hourly variations of airborne trace elements. This paper describes a detailed investigation conducted in March 2013 on the hourly variations and potential sources of airborne trace elements. Trace elements in particles with aerodynamic diameters less than 10 μm (PM_(10)) were monitored on-line in four representative regions with similar latitudes in southeastern China. Our results showed that the number of species of elements in PM_(10) detected at urban sites and an industrial park was greater than that at a rural site, due to the influences of human activities. The hourly variation patterns of trace elements indicated that their concentrations were stable during the day at the rural site, whereas a visible "double peak" of Pb and Cu was observed in the tourist city and a "single morning peak" of Pb and As was seen in the industrial city. These variations indicated the abundant traffic in the tourist city, and strong industrial emissions in the industrial city. However, the single morning peak and the slight double peak patterns of the trace elements were both found at the industrial park, indicating a combined source of industry and traffic. The results from the source identification also indicated that the sources of airborne elements were mainly industrial emissions at industrial sites, whereas the elements in the tourist city might primarily result from traffic. The correlations between PM_(10) concentrations and trace element concentrations were also studied. The results revealed that PM_(10) correlated better with elements originating from natural sources (e.g., K, Ca, Fe) than with those from anthropogenic sources (e.g., Pb, Zn, Cu). Our results provide a scientific basis for pollution control strategies at these sites.
- Published
- 2014
214. Development of a Surrogate Conflict Indicator for Freeway Exits Using Trajectory Data
- Author
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Tangyi Guo, Fan Wei, and Xue-jiao Jiang
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Time frame ,Computer science ,Trajectory ,Process (computing) ,Rare events ,Point (geometry) ,Crash ,Variation (game tree) ,Crash data ,Data mining ,computer.software_genre ,computer ,Simulation - Abstract
Crash occurrences are random rare events which are difficult to detect and reconstruct. Evaluating traffic safety using crash surrogate measures instead of historical crash data is attracting more and more attention. The trajectory, a continuous function of a vehicle’s temporal-spatial kinestate, is capable of depicting the process of crash potentials by means of theoretical analysis or simulation. The trajectory provides easy access to accurate calculation of the commonly used safety surrogate indicators like TTC and PET, which are difficult to obtain in practice. TTC and PET are the time differences between two vehicles during a quasi accident process. Compared with the situation in the final conflicting point, two vehicles may encounter a smaller distance or a bigger speed variation while approaching the conflict point. TTC and PET are deficient in describing abreast driving, or distinguishing the severity levels for approximately equal TTC (PET) cases. To remedy these shortcomings, this paper proposes a surrogate indicator Kj, the ratio of conflicting distance divided by relative speed. And an exponential model is developed to predict the conflict probability. Kj and the conflict probability are both time frame based, illustrating the changing process at each time frame during a conflict phase. The indicator Kj and conflict probability make it easier to describe the conflict mechanism and distinguish the levels of conflict severity.
- Published
- 2016
215. The impact of stakeholder's personal relationships on geographically distributed software development speed
- Author
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jiao, Jiang Ji, primary, Cong, Zhou, additional, and Ming, Yin, additional
- Published
- 2018
- Full Text
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216. Expression of the interleukin 17 in cortical tubers of the tuberous sclerosis complex
- Author
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Jiao-Jiang He, Song Li, Hui Yang, Kefu Wu, Chun-Qing Zhang, Hai-Feng Shu, Mei-Hua Yang, Shi-Yong Liu, and Qing Yin
- Subjects
Male ,Cortical tubers ,Pathology ,medicine.medical_specialty ,Inflammatory cytokine ,Immunology ,Clinical Neurology ,Biology ,Tuberous sclerosis ,Tuberous Sclerosis ,Interleukin 17 ,medicine ,Humans ,Immunology and Allergy ,Child ,Cerebral Cortex ,Receptors, Interleukin-17 ,Epilepsy ,Innate immune system ,Microglia ,Interleukin-17 ,fungi ,Infant ,food and beverages ,Acquired immune system ,medicine.disease ,Tuberous sclerosis protein ,medicine.anatomical_structure ,Neurology ,Tuberous sclerosis complex ,Child, Preschool ,Female ,Neurology (clinical) ,Immunostaining - Abstract
The role of interleukin 17 (IL-17) to epilepsy-associated cortical tubers of tuberous sclerosis complex (TSC) is unknown. We investigated the expression patterns of the IL-17 and IL-17 receptor (IL-17R) in cortical tubers of TSC compared with normal control cortex (CTX). We found that IL-17 and IL-17R were clearly upregulated in cortical tubers at the protein levels. Immunostaining indicated that IL-17 was specifically distributed in the innate immunity cells (DNs, GCs, astrocytes, and microglia) and adaptive immunity cells (T-lymphocytes) as well as the endothelial cells of blood vessels. The overexpression and distribution patterns of IL-17 may be involved in the epileptogenicity of cortical tubers in TSC.
- Published
- 2013
217. Remote Access and Control System Based on Infrared Communication Technology
- Author
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Xiu Jiao Jiang
- Subjects
Data flow diagram ,Engineering ,business.industry ,Control system ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,General Medicine ,business ,Infrared communication ,Communications protocol ,Telecommunications ,World science ,Coding (social sciences) - Abstract
With the development of world science and technology, people's quality of life and living standard is also improving gradually, so the technology of remote access and control system will be born. The household appliances are carried out the remote access based on infrared communication technology, to construct the infrared communication coding protocol procedures, it can pass through the procedures to achieve the related functions of various electrical appliances with the organic coordination, in order to remote access for the household appliances. At the same time through the timing function of the infrared communication technology, it can be form a complete access and the control system, and can be the formation of the received infrared communication and emission flow diagram, in order to achieve the largest household appliance function and use, effectively guide people better infrared communication technology to be widely and effectively used.
- Published
- 2013
218. Apparent digestibility of proteins, amino acids and phosphorus of seven feed ingredients for bluntnose black bream
- Author
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Xue-jiao Jiang, Jingjing Wang, Dan-ni Liang, Guang-zhen Jiang, and Wen-bin Liu
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chemistry.chemical_classification ,Fishery ,biology ,Chemistry ,Phosphorus ,chemistry.chemical_element ,Food science ,Management, Monitoring, Policy and Law ,Aquatic Science ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics ,Black bream ,Amino acid - Published
- 2013
219. A concise, protection-free and divergent approach for the enantioselective syntheses of two pheromonal epoxide components of the fall webworm moth and other species
- Author
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Yu Du, Jian-Feng Zheng, Zhi-Gang Wang, Li-Jiao Jiang, Yuan-Ping Ruan, and Pei-Qiang Huang
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Olefins -- Chemical properties ,Olefins -- Structure ,Epoxy compounds -- Chemical properties ,Epoxy compounds -- Structure ,Pheromones -- Structure ,Pheromones -- Chemical properties ,Biological sciences ,Chemistry - Abstract
Modified Sharpless asymmetric epoxidation is used for achieving sequential coupling reactions, and a divergent strategy, the protection-free syntheses of two main pheromonal components found in the fall webworm moth, Hyphantria cunea, and other species. The overall yields and the ee values of the final products are discussed.
- Published
- 2010
220. Human gait recognition based on Discrete Cosine Transform and Linear Discriminant Analysis
- Author
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Zhonghang He, Zheyi Fan, Shuqin Weng, Zhiwen Liu, and Jiao Jiang
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business.industry ,Speech recognition ,Feature extraction ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Pattern recognition ,02 engineering and technology ,Linear discriminant analysis ,Automation ,ComputingMethodologies_PATTERNRECOGNITION ,Gait (human) ,Discriminant ,020204 information systems ,Frequency domain ,0202 electrical engineering, electronic engineering, information engineering ,Discrete cosine transform ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,Energy (signal processing) ,Mathematics - Abstract
To improve the accuracy of gait recognition by fully utilizing gait information, a human gait recognition algorithm based on the Discrete Cosine Transform (DCT) and the Linear Discriminant Analysis (LDA) is proposed in this paper. First, frequency-domain features are extracted from the Gait Energy Image (GEI) by DCT, which can effectively distinguish different frequency components of human gait. Then, these frequency features are further mapped into the optimal discriminant vectors space by LDA, which can enhance the discrimination and reduce dimensions of features. Finally, the identity recognition is implemented according to the shortest similarity distance. Experiments on the database provided by Chinese Academy of Sciences (Institute of Automation) demonstrate that the proposed feature extraction strategy has the highest recognition rate among the compared methods.
- Published
- 2016
221. Elements analysis of Shaanxi's cultural tourism products based on the perspective of the whole industry chain
- Author
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Chang Liu, Yan-Mei Zhang, Yan-Chao Kang, and Ji-Jiao Jiang
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Commerce ,Geography ,Perspective (graphical) ,Economic geography ,Chain (unit) ,Cultural tourism - Published
- 2016
222. The Agricultural Industrialization of China’s Heilongjiang Province
- Author
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Jiao Jiang
- Subjects
Industrialisation ,business.industry ,Agriculture ,media_common.quotation_subject ,Production model ,Food processing ,Production (economics) ,Quality (business) ,Business ,Agricultural productivity ,China ,Agricultural economics ,media_common - Abstract
This paper refers to the fundamental distinguishing characteristics of agriculture in Heilongjiang Province, and analyses the current state of agricultural industrialization including: the regionalization of agricultural production centered on food production; the development trends which emphasize such matters as the quality of commodities; processing capacity; the cultivation of brand-name goods; and production models. In addition it raises problem points which should be paid attention to for the development of agricultural industrialized production.
- Published
- 2016
223. Apparent digestibility of eight unconventional feed ingredients for Megalobrama amblycephala
- Author
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Xue-jiao Jiang, Kang-le Lu, Wen-bin Liu, Dan-ni Liang, and Wei Xia
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biology ,Food science ,Management, Monitoring, Policy and Law ,Aquatic Science ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics ,Megalobrama - Published
- 2012
224. Development and Application of Continuous Atmospheric Heavy Metals Monitoring System Based on X-Ray Fluorescence
- Author
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Hua Jun Ye, Xin Feng Liao, Xue Jiao Jiang, Sheng Liang Guo, Xia Sheng Chen, and Lin Yao
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Weather condition ,Chemistry ,Continuous monitoring ,General Engineering ,Analytical chemistry ,Mineralogy ,X-ray fluorescence ,Monitoring system ,Heavy metals - Abstract
This paper presents a continuous atmospheric heavy metals monitoring system (AMMS-100) for heavy metals analysis based on X-ray fluorescence (XRF) technology. The AMMS-100 is used to collect the sample automatically with filters and then measure the concentrations of heavy metals by XRF. The accuracy of AMMS-100 for heavy metals analysis has been verified by the standard method. The relative errors, such as Pb and Fe, are lower than 10%. Moreover, the AMMS-100 can be used for long-term continuous monitoring the atmospheric heavy metals under different weather condition. The AMMS-100 described herein presents a continuous system for accurate analysis of atmospheric heavy metals with long-term stability.
- Published
- 2012
225. Effects of Working Pressure on the Microstructure and Properties of ZnO Thin Films Prepared by DC Magnetron Sputtering
- Author
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Fei Gao, Mei Xia Li, Li Yun Zheng, Rui Jiao Jiang, and Xiaoyan Liu
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Diffraction ,Photoluminescence ,Materials science ,genetic structures ,business.industry ,General Engineering ,Electron ,Sputter deposition ,Microstructure ,medicine.disease_cause ,eye diseases ,Optics ,medicine ,Optoelectronics ,Thin film ,business ,Single crystal ,Ultraviolet - Abstract
ZnO thin films were prepared by DC magnetron sputtering. The effects working pressures on the microstructure, optical properties and the photoluminescent properties were studied. The results show that ZnO thin films were successfully prepared with preferred orientation growth, showing structure of single crystal. The transmission of all the ZnO thin films kept above 85%. With increasing the working pressure, the surface of ZnO thin film became coarse, the intensity of X-ray diffraction peak decreased and the transmission of the film decreased and then increased. The intensity of the two photoluminescence peak of ZnO thin films one ultraviolet peak at 400 nm and one blue peak at 466 nm increased with increasing the working pressure. The ultraviolet peak was originated from the transition emission of the electrons from the conduction band to the valence band while the blue peak was originated from the defects in ZnO thin films.
- Published
- 2012
226. Studies on the Microstructure and Properties of TiO2/(Ag) Thin Films
- Author
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Xiaoyan Liu, Mei Xia Li, Li Yun Zheng, Fei Gao, and Rui Jiao Jiang
- Subjects
Diffraction ,Anatase ,Materials science ,Chemical engineering ,Phase (matter) ,Doping ,General Engineering ,Photocatalysis ,Nanotechnology ,Thin film ,Sputter deposition ,Microstructure - Abstract
TiO2/(Ag) thin films were prepared by DC magnetron sputtering. The effects of Ag-doping on the microstructure and properties were compared studied by atomic force microscopy (AFM), X-ray diffraction (XRD), UV-Vis spectra and photocatalysis tesing, respectively. The results show that when doped with Ag, the surface of TiO2 thin film was improved and the growth of anatase phase was promoted. The absoption properties of Ag-doped TiO2 thin film was enhanced dramatically compared with that of TiO2 thin film. And the photocatalysis properties of Ag-doped TiO2 thin film was increased twice as well.
- Published
- 2012
227. Effectiveness of Combining Plasma Exchange With Continuous Hemodiafiltration on Acute Fatty Liver of Pregnancy Complicated by Multiple Organ Dysfunction
- Author
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Hong-sheng Ren, Juan Zeng, Jin-jiao Jiang, Hai-Yan Zhou, Mei Meng, Ji-cheng Zhang, Chunting Wang, Wenying Zhu, and Yu-feng Chu
- Subjects
medicine.medical_specialty ,Pregnancy ,business.industry ,Septic shock ,Organ dysfunction ,Encephalopathy ,Biomedical Engineering ,Medicine (miscellaneous) ,Bioengineering ,General Medicine ,medicine.disease ,Intensive care unit ,Acute fatty liver of pregnancy ,Surgery ,law.invention ,Biomaterials ,law ,Anesthesia ,Coagulopathy ,medicine ,medicine.symptom ,business ,Rare disease - Abstract
Acute fatty liver of pregnancy (AFLP) is a rare disease of progressive hepatic insufficiency and secondary systemic complications that induce significant maternal risk. The application of combining plasma exchange (PE) and continuous hemodiafiltration (CHDF) is a novel concept for patients with AFLP. Since 2002, we have utilized the combination of PE with CHDF as adjunctive medical therapy for 11 AFLP patients with multiple organ dysfunction. Before PE and CHDF initiation, four patients had signs and symptoms of encephalopathy, four required ventilatory support, and all 11 were developing liver failure, significant renal compromise, and coagulopathy. PE combined with CHDF for patients was initiated a mean of 2 days postpartum (range, days 0-3). Daily or every other day PE combined with CHDF was undertaken on two to eight occasions for each of the 11 patients. Ten patients responded with composite clinical and laboratory improvement and were discharged to the ward, then cured and discharged from hospital; one patient died of septic shock. Average duration of hospitalization was 17 days (range, days 9-38) from time of admission to discharge; the average duration of intensive care unit was 10 days (range, days 4-23). No significant PE- and CHDF-related complications occurred. These results indicate that combing PE and CHDF in a series-parallel circuit is an effective and safe treatment for patients with severe AFLP. This finding may have important implications for the development of an effective treatment for patients with AFLP suffering multiple organ dysfunction.
- Published
- 2012
228. Microstructure and Properties of TiO2 Thin Films Doped with Ni
- Author
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Li Yun Zheng, Fei Gao, Mei Xia Li, Xiaoyan Liu, and Rui Jiao Jiang
- Subjects
Anatase ,Materials science ,Absorption edge ,Chemical engineering ,Sputtering ,Doping ,General Engineering ,Photocatalysis ,Nanotechnology ,Thin film ,Sputter deposition ,Microstructure - Abstract
TiO2 and Ni-doped TiO2 thin films were prepared by DC magnetron sputtering. The effects of Ni-doping on the microstructure and properties were studied by atomic force microscopy (AFM), X-ray diffraction (XRD), UV-Vis spectra and photocatalysis tesing, respectively. The results show that TiO2 thin films were successfully prepared with smooth surface. When doped with Ni, the surface of TiO2 thin film was improved and the growth of anatase phase was also promoted. With increasing the sputtering power of Ni, the absorption edge wavelegth red shifted and the photocatalysis property of TiO2 thin films was increased and then decreased
- Published
- 2012
229. Limit Cycle Bifurcations in a Class of Cubic System near a Nilpotent Center
- Author
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Jiao Jiang
- Subjects
Discrete mathematics ,Hopf bifurcation ,Pure mathematics ,General Medicine ,Center (group theory) ,Cubic crystal system ,Hamiltonian system ,Nilpotent ,symbols.namesake ,Bifurcation theory ,Limit cycle ,symbols ,Limit (mathematics) ,Mathematics - Abstract
In this paper we deal with a cubic near-Hamiltonian system whose unperturbed system is a simple cubic Hamiltonian system having a nilpotent center. We prove that the system can have 5 limit cycles by using bifurcation theory.
- Published
- 2012
230. Residues, Distributions, Sources, and Ecological Risks of OCPs in the Water from Lake Chaohu, China
- Author
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Fu-Liu Xu, Ning Qin, Qing-Mei Wang, Yu-Jiao Jiang, Xiang-Zhen Kong, Chen Yang, Qi-Shuang He, Wei He, Wen-Xiu Liu, Wen-Jing Wu, Bin Yang, and Hui-Ling Ouyang
- Subjects
Pollution ,China ,Article Subject ,Heptachlor ,media_common.quotation_subject ,lcsh:Medicine ,lcsh:Technology ,General Biochemistry, Genetics and Molecular Biology ,DDT ,chemistry.chemical_compound ,Spatio-Temporal Analysis ,Environmental monitoring ,Endrin ,Hydrocarbons, Chlorinated ,Water Pollution, Chemical ,Aldrin ,Pesticides ,lcsh:Science ,General Environmental Science ,media_common ,Pesticide residue ,lcsh:T ,Ecology ,lcsh:R ,Pesticide Residues ,General Medicine ,Pesticide ,Lakes ,chemistry ,Environmental chemistry ,Environmental science ,lcsh:Q ,Lindane ,Water Pollutants, Chemical ,Research Article ,Environmental Monitoring - Abstract
The levels of 18 organochlorine pesticides (OCPs) in the water from Lake Chaohu were measured by a solid phase extraction-gas chromatography-mass spectrometer detector. The spatial and temporal distribution, possible sources, and potential ecological risks of the OCPs were analyzed. The annual mean concentration for the OCPs in Lake Chaohu was 6.99 ng/L. Aldrin, HCHs, and DDTs accounted for large proportions of the OCPs. The spatial pollution followed the order of Central Lakes > Western Lakes > Eastern Lakes and water area. The sources of the HCHs were mainly from the historical usage of lindane. DDTs were degraded under aerobic conditions, and the main sources were from the use of technical DDTs. The ecological risks of 5 OCPs were assessed by the species sensitivity distribution (SSD) method in the order of heptachlor > γ-HCH > p,p′-DDT > aldrin > endrin. The combining risks of all sampling sites were MS > JC > ZM > TX, and those of different species were crustaceans > fish > insects and spiders. Overall, the ecological risks of OCP contaminants on aquatic animals were very low.
- Published
- 2012
231. Effect of probiotics on the incidence of ventilator-associated pneumonia in critically ill patients: a randomized controlled multicenter trial
- Author
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Jin-jiao Jiang, Fu-Shen Zhang, Hong-sheng Ren, Juan Zeng, Shi-Fu Wang, Mei Meng, Chunting Wang, Quan-Sheng Du, Feng Qi, Shuang Ma, Chun-Hua Li, Min Si, Lu-Yi Liu, Yu-feng Chu, Yuan-Zhong Li, Yun Li, Shu-Liu Zhang, Song Cui, He-Ling Zhao, Yan Qu, Zhao-Tao Tian, Yuping Wang, Min Ding, Hui Tian, Tie-Jun Wu, Ji-cheng Zhang, and Zhuang Ma
- Subjects
Adult ,Male ,medicine.medical_specialty ,Pediatrics ,Time Factors ,medicine.medical_treatment ,Critical Illness ,Stomach Diseases ,Oropharynx ,Critical Care and Intensive Care Medicine ,Enterococcus faecalis ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Internal medicine ,Multicenter trial ,Medicine ,Humans ,Mechanical ventilation ,biology ,business.industry ,Stomach ,Incidence (epidemiology) ,Probiotics ,Ventilator-associated pneumonia ,Pneumonia, Ventilator-Associated ,030208 emergency & critical care medicine ,Bacterial Infections ,Middle Aged ,medicine.disease ,biology.organism_classification ,Antimicrobial ,Respiration, Artificial ,Pneumonia ,Intensive Care Units ,medicine.anatomical_structure ,030228 respiratory system ,Female ,business ,Bacillus subtilis - Abstract
To evaluate the potential preventive effect of probiotics on ventilator-associated pneumonia (VAP). This was an open-label, randomized, controlled multicenter trial involving 235 critically ill adult patients who were expected to receive mechanical ventilation for ≥48 h. The patients were randomized to receive (1) a probiotics capsule containing live Bacillus subtilis and Enterococcus faecalis (Medilac-S) 0.5 g three times daily through a nasogastric feeding tube plus standard preventive strategies or (2) standard preventive strategies alone, for a maximum of 14 days. The development of VAP was evaluated daily, and throat swabs and gastric aspirate were cultured at baseline and once or twice weekly thereafter. The incidence of microbiologically confirmed VAP in the probiotics group was significantly lower than that in the control patients (36.4 vs. 50.4 %, respectively; P = 0.031). The mean time to develop VAP was significantly longer in the probiotics group than in the control group (10.4 vs. 7.5 days, respectively; P = 0.022). The proportion of patients with acquisition of gastric colonization of potentially pathogenic microorganisms (PPMOs) was lower in the probiotics group (24 %) than the control group (44 %) (P = 0.004). However, the proportion of patients with eradication PPMO colonization on both sites of the oropharynx and stomach were not significantly different between the two groups. The administration of probiotics did not result in any improvement in the incidence of clinically suspected VAP, antimicrobial consumption, duration of mechanical ventilation, mortality and length of hospital stay. Therapy with the probiotic bacteria B. Subtilis and E. faecalis are an effective and safe means for preventing VAP and the acquisition of PPMO colonization in the stomach.
- Published
- 2015
232. A homology sound-based algorithm for speech signal interference
- Author
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Hou-jin Chen, Zhan-song Zhang, Yi-jiao Jiang, and Ju-peng Li
- Subjects
Interference (communication) ,Computer Science::Sound ,Noise (signal processing) ,Computer science ,Speech recognition ,Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing) ,White noise ,Cache ,Homology (mathematics) ,Speech processing ,Signal ,Algorithm ,Randomness - Abstract
Aiming at secure analog speech communication, a homology sound-based algorithm for speech signal interference is proposed in this paper. We first split speech signal into phonetic fragments by a short-term energy method and establish an interference noise cache library with the phonetic fragments. Then we implement the homology sound interference by mixing the randomly selected interferential fragments and the original speech in real time. The computer simulation results indicated that the interference produced by this algorithm has advantages of real time, randomness, and high correlation with the original signal, comparing with the traditional noise interference methods such as white noise interference. After further studies, the proposed algorithm may be readily used in secure speech communication.
- Published
- 2015
233. Elevated Expression of VEGF-C and Its Receptors, VEGFR-2 and VEGFR-3, in Patients with Mesial Temporal Lobe Epilepsy
- Author
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Chun-Qing Zhang, Wei Guo, Song Li, Qing Yin, Yu-Jia Wei, Hui Yang, Shi-Yong Liu, Xin Chen, Fei-Ji Sun, and Jiao-Jiang He
- Subjects
0301 basic medicine ,Adult ,Male ,Pathology ,medicine.medical_specialty ,Adolescent ,Vascular Endothelial Growth Factor C ,Hippocampus ,Neocortex ,Biology ,Epileptogenesis ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,medicine ,Humans ,Receptor ,Neurons ,Kinase insert domain receptor ,General Medicine ,Vascular Endothelial Growth Factor Receptor-3 ,Vascular Endothelial Growth Factor Receptor-2 ,nervous system diseases ,030104 developmental biology ,medicine.anatomical_structure ,Real-time polymerase chain reaction ,Vascular endothelial growth factor C ,Epilepsy, Temporal Lobe ,Astrocytes ,Case-Control Studies ,embryonic structures ,Immunohistochemistry ,Female ,030217 neurology & neurosurgery - Abstract
Mesial temporal lobe epilepsy (MTLE) is a frequent form of focal intractable epilepsy in adults. We previously reported overexpression of vascular endothelial growth factor C (VEGF-C) and its receptors, VEGFR-2 and VEGFR-3, in epilepsy-associated tuberous sclerosis complex. To identify whether VEGF-C and its receptors are involved in epileptogenesis of MTLE, we investigated the levels and expression pattern of VEGF-C and its receptors in temporal neocortex and hippocampus (HPC) from 28 patients with MTLE and ten control (CTX) subjects. Real-time quantitative polymerase chain reaction and Western blotting results revealed upregulated mRNA and immunoreactive protein levels of VEGF-C, VEGFR-2, and VEGFR-3 in the MTLE group compared to the control groups. Immunohistochemistry and double-labeled immunofluorescence showed that VEGF-C was highly expressed in neurons and astrocytes, including reactive astrocytes and vascular endothelial cells, VEGFR-2 was expressed at a high level in reactive astrocytes and vascular endothelial cells, but not in neurons, whereas VEGFR-3 was only overexpressed in reactive astrocytes. Taken together, these findings suggest that VEGF-C and its receptors, VEGFR-2 and VEGFR-3, may contribute to the epileptogenesis of MTLE.
- Published
- 2015
234. The Toronto General Hospital Transitional Pain Service: development and implementation of a multidisciplinary program to prevent chronic postsurgical pain
- Author
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Paul Ritvo, Karen McRae, Kirsten Wentlandt, Bansi R Shah, Sheldon Lyn, David R. Grant, Rita Katznelzon, Kayla McMillan, Salima S.J. Ladak, Ralph W. Gilbert, Tahir Janmohamed, Aliza Weinrib, Marc de Perrot, Stefan O.P. Hofer, Gerald O'Leary, Jiao Jiang, Sean P. Cleary, Hance Clarke, Qing Li, Duminda N. Wijeysundera, Diana Tamir, Samantha R. Fashler, Vivek Rao, Joel Katz, Graham Roche-Nagle, and Daniel Santa Mina
- Subjects
medicine.medical_specialty ,chronic postsurgical pain ,Acceptance and commitment therapy ,Intervention (counseling) ,Health care ,Medicine ,Journal of Pain Research ,Depression (differential diagnoses) ,lcsh:R5-920 ,transition to chronic pain ,opioid use ,business.industry ,Chronic pain ,multidisciplinary treatment ,Perioperative ,medicine.disease ,Transitional Pain Service ,3. Good health ,Anesthesiology and Pain Medicine ,Physical therapy ,Anxiety ,Pain catastrophizing ,medicine.symptom ,lcsh:Medicine (General) ,business ,Perspectives - Abstract
Joel Katz,1–3 Aliza Weinrib,1,2 Samantha R Fashler,2 Rita Katznelzon,1,3 Bansi R Shah,1 Salima SJ Ladak,1 Jiao Jiang,1 Qing Li,1 Kayla McMillan,1 Daniel Santa Mina,5,6 Kirsten Wentlandt,7 Karen McRae,1,3 Diana Tamir,1,3 Sheldon Lyn,1,3 Marc de Perrot,8 Vivek Rao,9 David Grant,10 Graham Roche-Nagle,11 Sean P Cleary,12 Stefan OP Hofer,13 Ralph Gilbert,14 Duminda Wijeysundera,1,3 Paul Ritvo,15 Tahir Janmohamed,16 Gerald O’Leary,1,3 Hance Clarke1,3 1Department of Anesthesia and Pain Management, Toronto General Hospital, University Health Network, University of Toronto, 2Department of Psychology, York University, 3Department of Anesthesia, University of Toronto, 4Palliative Care, University Health Network, University of Toronto, 5Princess Margaret Cancer Centre, University Health Network, University of Toronto, 6Faculty of Kinesiology and Physical Education, University of Toronto, 7Department of Family and Community Medicine, University of Toronto, 8Division of Thoracic Surgery, Toronto General Hospital, 9Division of Cardiovascular Surgery, Toronto General Hospital, 10Multiorgan Transplant Program, Toronto General Hospital, 11Division of Vascular Surgery, Toronto General Hospital, 12Division of General Surgery, Toronto General Hospital, 13Division of Plastic Surgery, Toronto General Hospital, 14Division of Otolaryngology – Head and Neck Surgery, Toronto General Hospital, 15Department of Kinesiology and Health Science, York University, 16ManagingLife, Toronto, ON, CanadaAbstract: Chronic postsurgical pain (CPSP), an often unanticipated result of necessary and even life-saving procedures, develops in 5–10% of patients one-year after major surgery. Substantial advances have been made in identifying patients at elevated risk of developing CPSP based on perioperative pain, opioid use, and negative affect, including depression, anxiety, pain catastrophizing, and posttraumatic stress disorder-like symptoms. The Transitional Pain Service (TPS) at Toronto General Hospital (TGH) is the first to comprehensively address the problem of CPSP at three stages: 1) preoperatively, 2) postoperatively in hospital, and 3) postoperatively in an outpatient setting for up to 6 months after surgery. Patients at high risk for CPSP are identified early and offered coordinated and comprehensive care by the multidisciplinary team consisting of pain physicians, advanced practice nurses, psychologists, and physiotherapists. Access to expert intervention through the Transitional Pain Service bypasses typically long wait times for surgical patients to be referred and seen in chronic pain clinics. This affords the opportunity to impact patients' pain trajectories, preventing the transition from acute to chronic pain, and reducing suffering, disability, and health care costs. In this report, we describe the workings of the Transitional Pain Service at Toronto General Hospital, including the clinical algorithm used to identify patients, and clinical services offered to patients as they transition through the stages of surgical recovery. We describe the role of the psychological treatment, which draws on innovations in Acceptance and Commitment Therapy that allow for brief and effective behavioral interventions to be applied transdiagnostically and preventatively. Finally, we describe our vision for future growth. Keywords: Transitional Pain Service, chronic postsurgical pain, transition to chronic pain, opioid use, multidisciplinary treatment
- Published
- 2015
235. Preparation and Optical Properties of Poly[3,4-Bis-(1,3-Dioxane-2-Ylethyl)] Thiophene
- Author
-
Yu Jiao Jiang, Yong Hong Wang, Fei Chen, Hong Lei Mao, Rong Li, and Guo Lun Zhong
- Subjects
chemistry.chemical_classification ,Photoluminescence ,Materials science ,General Engineering ,Polymer ,Photochemistry ,Steric repulsion ,chemistry.chemical_compound ,Precursor polymer ,chemistry ,Polymer chemistry ,Thiophene ,Polar effect ,Fourier transform infrared spectroscopy ,Absorption (chemistry) - Abstract
A new polythiophene derivative, poly[3,4-bis-(1,3-dioxane-2-ylethyl) thiophene] (PBDT) with two 1,3-dioxane groups was synthesized via two-step strategy. Firstly, a precursor polymer poly(3,4-dibromothiophene) (PDBrT) was prepared, and secondly the bromo-atoms were substituted by 1,3-dioxan-2-ylethyl groups to get the target polymer. The later reaction was monitored by FTIR spectroscopy. Molecular weights of PBDT were measured by GPC. In addition, the optical absorption and photoluminescence (PL) of PBDT and PDBrT were investigated and demonstrated that the maximum emission wavelength of PBDT was red-shifted about 80 nm in comparison with that of PDBrT, which was due to the effects of electron withdrawing and steric repulsion between two 1,3-dioxane-2-ylethyl groups.
- Published
- 2011
236. Preparation and Optical Properties of CdS/PVK Nanocomposites Based on CdS Nanorod Arrays
- Author
-
Guo Lun Zhong, Yu Jiao Jiang, and Fei Chen
- Subjects
Conductive polymer ,Nanocomposite ,Materials science ,Photoluminescence ,Carbazole ,business.industry ,Scanning electron microscope ,General Engineering ,chemistry.chemical_compound ,Semiconductor ,chemistry ,Optoelectronics ,Quantum efficiency ,Nanorod ,business - Abstract
Well-defined CdS nanorod arrays were pepared via a facile one-step hydrothermal approach and Poly (N-vinyl carbazole) (PVK)/CdS nanocomposites were fabricated by spin-coating chloroform solution of PVK on the surface of CdS film. A variety of techniques including scanning electron microscopy (SEM), optical absorption and photoluminescence (PL) were employed to investigate the surface morphology and optical properties of PVK/CdS nanocomposites. Photoluminescence efficiency of nanocomposites decreases compared to pure PVK and CdS nanorod arrays due to quenching through high photocharge generation quantum efficiency and high charge transport between inorganic semiconductor and conducting polymer.
- Published
- 2011
237. Synthesis and Luminescent Properties of Novel Polythiophene Derivatives with 1,3-Dioxane Group
- Author
-
Guo Lun Zhong, Fei Chen, Yu Jiao Jiang, Rong Li, Yong Hong Wang, and Hong Lei Mao
- Subjects
chemistry.chemical_classification ,Materials science ,Photoluminescence ,Mechanical Engineering ,Polymer ,Condensed Matter Physics ,Photochemistry ,chemistry.chemical_compound ,chemistry ,Polymerization ,Mechanics of Materials ,Polymer chemistry ,Side chain ,Thiophene ,Proton NMR ,Polythiophene ,General Materials Science ,Thermal stability - Abstract
Two novel polythiophenes with 1,3-dioxane group in the side chain named poly[3-(1,3-dioxane-2-ylethyl)thiophene] (PDT) and poly[3-(1,3-dioxane-2-ylethyl)-4-methyl- thiophene] (PDMT) were synthesized via oxidative polymerization firstly to form their precursor polymers and substitution secondly to obtain the target polymers in this paper. The chemical structures, molecular weights, thermal properties of the polymers were characterized by 1H NMR, FT-IR, GPC, and TGA respectively, indicating that both polymers had high molecular weight and good thermal stability. Meanwhile, the optical absorption and photoluminescence (PL) of both polymers were investigated and the results showed that the maximum absorption and emission wavelengths of PDMT were blue-shifted than that of PDT due to its methyl-substitution at 4-position in thiophene.
- Published
- 2010
238. Design of a multiband near-infrared sky brightness monitor using an InSb detector
- Author
-
Qingfeng Zhu, Qi-Jie Tang, Hai-jiao Jiang, Jie Chen, Feng-xin Jiang, Shu-cheng Dong, Peng Jiang, Zhi-yue Wang, Yi-hao Zhang, Jin-ting Chen, Hong-fei Zhang, Tuo Ji, and Jian Wang
- Subjects
Infrared astronomy ,010308 nuclear & particles physics ,Infrared ,media_common.quotation_subject ,Detector ,Near-infrared spectroscopy ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,law.invention ,Telescope ,Observatory ,Sky brightness ,law ,Sky ,0103 physical sciences ,Environmental science ,Astrophysics::Earth and Planetary Astrophysics ,010303 astronomy & astrophysics ,Instrumentation ,Astrophysics::Galaxy Astrophysics ,Remote sensing ,media_common - Abstract
Infrared sky background level is an important parameter of infrared astronomy observations from the ground, particularly for a candidate site of an infrared capable observatory since low background level is required for such a site. The Chinese astronomical community is looking for a suitable site for a future 12 m telescope, which is designed for working in both optical and infrared wavelengths. However, none of the proposed sites has been tested for infrared observations. Nevertheless, infrared sky background measurements are also important during the design of infrared observing instruments. Based on the requirement, in order to supplement the current site survey data and guide the design of future infrared instruments, a multiband near-infrared sky brightness monitor (MNISBM) based on an InSb sensor is designed in this paper. The MNISBM consists of an optical system, mechanical structure and control system, detector and cooler, high gain readout electronics, and operational software. It is completed and tested in the laboratory. The results show that the sensitivity of the MNISBM meets the requirements of the measurement of near-infrared sky background level of several well-known astronomical infrared observing sites.
- Published
- 2018
239. Structure preserving clustering-object tracking via subgroup motion pattern segmentation
- Author
-
Zhiwen Liu, Yixuan Zhu, Zheyi Fan, Shuqin Weng, and Jiao Jiang
- Subjects
Similarity (geometry) ,business.industry ,Computer science ,General Engineering ,Motion detection ,02 engineering and technology ,Image segmentation ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Motion (physics) ,010309 optics ,Robustness (computer science) ,Video tracking ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Segmentation ,Computer vision ,Artificial intelligence ,business ,Cluster analysis - Abstract
Tracking clustering objects with similar appearances simultaneously in collective scenes is a challenging task in the field of collective motion analysis. Recent work on clustering-object tracking often suffers from poor tracking accuracy and terrible real-time performance due to the neglect or the misjudgment of the motion differences among objects. To address this problem, we propose a subgroup motion pattern segmentation framework based on a multilayer clustering structure and establish spatial constraints only among objects in the same subgroup, which entails having consistent motion direction and close spatial position. In addition, the subgroup segmentation results are updated dynamically because crowd motion patterns are changeable and affected by objects’ destinations and scene structures. The spatial structure information combined with the appearance similarity information is used in the structure preserving object tracking framework to track objects. Extensive experiments conducted on several datasets containing multiple real-world crowd scenes validate the accuracy and the robustness of the presented algorithm for tracking objects in collective scenes.
- Published
- 2018
240. Bis-Lewis acids-catalyzed highly diastereoselective one-pot reductive dehydroxylation of chiral N,O-acetals
- Author
-
Jian-Liang Ye, Pei-Qiang Huang, Jian-Feng Zheng, Bo Teng, and Li-Jiao Jiang
- Subjects
Bicyclic molecule ,Organic Chemistry ,Acetal ,Enantioselective synthesis ,Biochemistry ,Medicinal chemistry ,Catalysis ,chemistry.chemical_compound ,Acid catalysis ,chemistry ,Drug Discovery ,Lactam ,Organic chemistry ,Organic synthesis ,Lewis acids and bases - Abstract
NSFC [20832005, 20602028]; Innovative Research Team in Science & Technology (University) in Fujian Province
- Published
- 2010
241. Small-amplitude limit cycles of some Liénard-type systems
- Author
-
Jiao Jiang and Maoan Han
- Subjects
Hopf bifurcation ,Liénard equation ,Applied Mathematics ,Mathematical analysis ,Type (model theory) ,Small amplitude ,Infimum and supremum ,symbols.namesake ,Limit cycle ,symbols ,Applied mathematics ,Limit (mathematics) ,Analysis ,Bifurcation ,Mathematics - Abstract
As we know, the Lienard system and its generalized forms are classical and important models of nonlinear oscillators, and have been widely studied by mathematicians and scientists. The main problem considered by most people is the number of limit cycles. In this paper, we investigate two kinds of Lienard systems and obtain the maximal number (i.e. the least upper bound) of limit cycles appearing in Hopf bifurcations by applying some known bifurcation theorems with technical analysis.
- Published
- 2009
242. LIMIT CYCLES FOR A CLASS OF QUINTIC NEAR-HAMILTONIAN SYSTEMS NEAR A NILPOTENT CENTER
- Author
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Maoan Han, Jizhou Zhang, and Jiao Jiang
- Subjects
Hopf bifurcation ,Pure mathematics ,Applied Mathematics ,Mathematical analysis ,Center (group theory) ,Quintic function ,Hamiltonian system ,symbols.namesake ,Nilpotent ,Modeling and Simulation ,Limit cycle ,symbols ,Homoclinic bifurcation ,Limit (mathematics) ,Engineering (miscellaneous) ,Mathematics - Abstract
In this paper we deal with a centrally symmetric quintic near-Hamiltonian system whose unperturbed system is a simple cubic Hamiltonian system having a nilpotent center. We prove that the system can have ten limit cycles by using a homoclinic bifurcation method based on stability-change.
- Published
- 2009
243. A Flexible Approach to Methyl (5S)-5-Alkyltetramate Derivatives
- Author
-
Jian-Liang Ye, Pei-Qiang Huang, Li-Jiao Jiang, Jian-Feng Zheng, and Hong-Qiao Lan
- Subjects
Chemistry ,Organic Chemistry ,Synthon ,Enantioselective synthesis ,Cationic polymerization ,Organic chemistry ,Regioselectivity ,Grignard reagent ,Alkylation - Abstract
Regioselective Grignard reagent additions to 3-methoxymaleimidesand subsequent diastereoselective reductive dehydroxylation of theresulting N, O-acetalswere studied. On the basis of these studies, a flexible and highlyregio- and diastereoselective approach to methyl 5-alkyltetramatederivatives was disclosed. The method is the first direct and flexibleasymmetric cationic synthon-based approach, and allows for the synthesisof various methyl (5 S)-5-alkyltetramatederivatives that are otherwise inaccessible by the commonly usedmethods based on α-amino acids.
- Published
- 2009
244. LIMIT CYCLE BIFURCATIONS IN NEAR-HAMILTONIAN SYSTEMS BY PERTURBING A NILPOTENT CENTER
- Author
-
Huaiping Zhu, Maoan Han, and Jiao Jiang
- Subjects
Hopf bifurcation ,Period-doubling bifurcation ,Applied Mathematics ,Mathematical analysis ,Saddle-node bifurcation ,Bifurcation diagram ,symbols.namesake ,Pitchfork bifurcation ,Transcritical bifurcation ,Bifurcation theory ,Modeling and Simulation ,symbols ,Infinite-period bifurcation ,Engineering (miscellaneous) ,Mathematics - Abstract
As we know, Hopf bifurcation is an important part of bifurcation theory of dynamical systems. Almost all known works are concerned with the bifurcation and number of limit cycles near a nondegenerate focus or center. In the present paper, we study a general near-Hamiltonian system on the plane whose unperturbed system has a nilpotent center. We obtain an expansion for the first order Melnikov function near the center together with a computing method for the first coefficients. Using these coefficients, we obtain a new bifurcation theorem concerning the limit cycle bifurcation near the nilpotent center. An interesting application example & a cubic system having five limit cycles & is also presented.
- Published
- 2008
245. Growth inhibition and gene induction in human hepatocellular carcinoma cell exposed to sodium 4-phenylbutanoate
- Author
-
Jin-jiao Jiang, Chengyong Qin, Ji-cheng Zhang, Chang-jun Jin, Hong-sheng Ren, Chunting Wang, Jun-Mei Jiang, Dong-Qing Yu, and Mei Meng
- Subjects
Cyclin-Dependent Kinase Inhibitor p21 ,medicine.medical_specialty ,Carcinoma, Hepatocellular ,Cell cycle checkpoint ,Cellular differentiation ,Blotting, Western ,Antineoplastic Agents ,Biology ,chemistry.chemical_compound ,Cell Line, Tumor ,Internal medicine ,medicine ,Humans ,Enzyme Inhibitors ,Cell Proliferation ,Cell growth ,Liver cell ,Cell Cycle ,Liver Neoplasms ,General Medicine ,Cell cycle ,Cadherins ,Phenylbutyrates ,Molecular biology ,HDAC4 ,Histone Deacetylase Inhibitors ,Endocrinology ,chemistry ,Cell culture ,Growth inhibition - Abstract
Background Sodium 4-phenylbutanoate (NaPB) can induce cellular differentiation and cell cycle arrest. However, its potential anticancer properties in hepatocellular carcinoma and influence on normal liver cell are still unclear. We observed the effects of NaPB on growth inhibition, including differentiation and phase growth arrest in normal liver cell line L-02 and hepatocellular carcinoma cell line Bel-7402. Furthermore, we investigated its mechanism in Bel-7402. Methods Hepatocellular carcinoma cells Bel-7402 and normal liver cell line L-02 were treated with NaPB at different concentrations. Light microscopy was used to find morphological change in cells. Cell cycle was detected by flow cytometry. Expression of acetylating histone H4 and of histones deacetylase 4 (HDAC4) were determined by Western blot. The expression of P21 WAF1/CIP1 and E-cadherin were observed through immunocytochemistry. Results NaPB treatment led to time dependent growth inhibition in hepatocellular carcinoma cells Bel-7402. NaPB treatment caused a significant decline in the fraction of S phase cells and a significant increase in G 0 /G 1 cells. NaPB increased the expression of P21 WAF1/CIP1 and E-cadherin in Bel-7402 and significantly decreased the level of HDAC4 in Bel-7402. NaPB significantly improved the level of acetylating histone H4. The normal liver cell line L-02 showed no distinct changes under treatment with NaPB. Conclusions NaPB inhibited the growth of hepatocellular carcinoma cells Bel-7402 and induced partial differentiation through enhancing the acetylating histones. In Bel-7402, the expressions of P21 WAF1/CIP1 and E-cadherin may be related to level of acetylating histones and inhibition of cellular growth. NaPB showed no significant effect on normal liver cells.
- Published
- 2008
246. Melnikov function and limit cycle bifurcation from a nilpotent center
- Author
-
Jiao Jiang and Maoan Han
- Subjects
Hopf bifurcation ,Mathematics(all) ,Nilpotent center ,Melnikov function ,General Mathematics ,Mathematical analysis ,Topology ,First order ,Hamiltonian system ,Nilpotent ,symbols.namesake ,Limit cycle ,symbols ,Near-Hamiltonian system ,Hamiltonian (quantum mechanics) ,Bifurcation ,Melnikov method ,Mathematics - Abstract
We investigate a general near-Hamiltonian system on the plane whose unperturbed system has a nilpotent center. Our main purpose is to give an algorithm for calculating the first coefficients of the expansion of the first order Melnikov function. We also give an application by using the method and obtain the number of limit cycles of a cubic system.
- Published
- 2008
247. LIMIT CYCLES IN TWO TYPES OF SYMMETRIC LIÉNARD SYSTEMS
- Author
-
Stephen Lynch, Jiao Jiang, Maoan Han, and Pei Yu
- Subjects
Nonlinear oscillators ,Singularity ,Liénard equation ,Symmetric polynomial ,Applied Mathematics ,Modeling and Simulation ,Limit cycle ,Mathematical analysis ,Limit (mathematics) ,Engineering (miscellaneous) ,Mathematics - Abstract
Liénard systems and their generalized forms are classical and important models of nonlinear oscillators, and have been widely studied by mathematicians and scientists. The main problem considered is the maximal number of limit cycles that the system can have. In this paper, two types of symmetric polynomial Liénard systems are investigated and the maximal number of limit cycles bifurcating from Hopf singularity is obtained. A global result is also presented.
- Published
- 2007
248. [Sewage sludge conditioning by bioleaching combined with Fenton-like oxidation]
- Author
-
Chang-geng, Liu, Pan-yue, Zhang, Jiao-jiao, Jiang, Cheng-hua, Zeng, Yi, Huang, and Guo-yin, Xu
- Subjects
Sewage ,Hydrogen Peroxide ,Oxidation-Reduction ,Waste Disposal, Fluid ,Filtration - Abstract
Bioleaching combined with Fenton-like oxidation was used to condition sewage sludge. The results showed that it took approximately 1 d to decrease pH from 6.9 to 2.5 by bioleaching, with fixed sulfur power and FeSO4 x 7H2O dosages of 3 g x L(-1) and 8 g x L(-1), respectively. After bioleaching, the volatile solids(VS) reduction was 13.4%, and the specific resistance to filtration(SRF) dropped from 3.1 x 10(9)s2 x g(-1) to 1.5 x 10(9)s2 x g(-1) with a reduction of 51.6%, but the bioleached sludge was still difficult to be dewatered. The bioleached sludge was further oxidized by Fenton-like oxidation. The results indicated that the optimal H2O2 dosage and reaction time were 3.3 g x L(-1) and 60 min, respectively. Under the optimal conditions, VS reduction was 30.8%, SRF was declined to 1.9 x 10(8) s2 x g(-1) with a reduction of 93.9%, and the moisture of sludge cake was 76.9%. After treated by bioleaching combined with Fenton-like oxidation, the dewaterability and stability of sewage sludge were significantly improved. Besides, the combined technology was more efficient in conditioning sewage sludge than single Fenton-like oxidation.
- Published
- 2015
249. Research Development of the Traditional and Flexible Shed-holes
- Author
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Yunfei Luo, Jianrong Yang, Jiao Jiang, and Yitang Zhou
- Subjects
Engineering ,business.industry ,Forensic engineering ,Research development ,Impact ,Reinforced concrete ,business ,Construction engineering - Abstract
Rock-fall impact is the main threat to the roads and bridges. The research background, methodology and literature review are introduced respectively on rock-fall impact to traditional reinforced concrete shed-hole and flexible steel shed-hole. The impact force transmission mechanism is brought into focus. It combines with the advantages and disadvantages. And the development trends in the future is discussed.
- Published
- 2015
250. Toxic Effects of Ethyl Cinnamate on the Photosynthesis and Physiological Characteristics of Chlorella vulgaris Based on Chlorophyll Fluorescence and Flow Cytometry Analysis
- Author
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Wei He, Yu-Jiao Jiang, Yang Jiao, Hui-Ling Ouyang, Xiang-Zhen Kong, Fu-Liu Xu, Wen-Xiu Liu, and Bin Yang
- Subjects
Chlorophyll ,Chlorophyll a ,Article Subject ,Chlorella vulgaris ,lcsh:Medicine ,Photosynthesis ,Esterase ,lcsh:Technology ,Fluorescence ,General Biochemistry, Genetics and Molecular Biology ,chemistry.chemical_compound ,Biomass ,lcsh:Science ,Chlorophyll fluorescence ,General Environmental Science ,EC50 ,lcsh:T ,lcsh:R ,Esterases ,General Medicine ,Ethyl cinnamate ,chemistry ,Biochemistry ,Cinnamates ,lcsh:Q ,Research Article ,Nuclear chemistry - Abstract
The toxic effects of ethyl cinnamate on the photosynthetic and physiological characteristics ofChlorella vulgariswere studied based on chlorophyll fluorescence and flow cytometry analysis. Parameters, including biomass,Fv/Fm(maximal photochemical efficiency of PSII), ФPSII(actual photochemical efficiency of PSII in the light), FDA, and PI staining fluorescence, were measured. The results showed the following: (1) The inhibition on biomass increased as the exposure concentration increased. 1 mg/L ethyl cinnamate was sufficient to reduce the total biomass ofC. vulgaris. The 48-h and 72-h EC50 values were 2.07 mg/L (1.94–2.20) and 1.89 mg/L (1.82–1.97). (2) After 24 h of exposure to 2–4 mg/L ethyl cinnamate, the photosynthesis ofC. vulgarisalmost ceased, manifesting in ФPSIIbeing close to zero. After 72 h of exposure to 4 mg/L ethyl cinnamate, theFv/FmofC. vulgarisdropped to zero. (3) Ethyl cinnamate also affected the cellular physiology ofC. vulgaris, but these effects resulted in the inhibition of cell yield rather than cell death. Exposure to ethyl cinnamate resulted in decreased esterase activities inC. vulgaris, increased average cell size, and altered intensities of chlorophyll a fluorescence. Overall, esterase activity was the most sensitive variable.
- Published
- 2015
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