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Search Results: 1 - 10 of 78579 matches for " Yanyan Chen "
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Cross-National Analysis on Sensitivity to Environmental Quality and Its Change in East Asia  [PDF]
Yanyan Chen, Yuejun Zheng
Advances in Applied Sociology (AASoci) , 2015, DOI: 10.4236/aasoci.2015.56018
Abstract: This paper aims to compare people’s sensitivity to environmental change in China, Japan and South Korea across spatial and temporal dimensions by analysing the data derived from a cross-national survey. Based on the analytical results derived from 3907 samples, the consistency of people’s environmental sensitivity on the temporal dimension and the gap on the spatial dimension are clarified. The analysis on the temporal dimension indicates that people are inclined to hold a consistent evaluation toward environmental change, while the analysis on the spatial dimension of environmental sensitivity indicates that people are more sensitive to the deterioration of global rather than domestic environmental change. Data analysis also indicates that Japanese and South Koreans are pessimistic regarding the change of the environment while the Chinese are optimistic. In addition, the attributive features of individuals who are more sensitive to the environmental change are clarified within each country, and the results show that under different social backgrounds, the influence of demographic factors is somewhat dissimilar.
Analyzing Pedestrian Fatality Risk in Accidents at Mid-Blocks  [PDF]
Yanyan Chen, Jiajie Ma, Ning Chen
Journal of Transportation Technologies (JTTs) , 2019, DOI: 10.4236/jtts.2019.92011
Abstract: Objective: Pedestrian safety is considered as one of the greatest concerns, especially for developing countries. In the year of 2015, about 48% pedestrian accidents with 56% fatalities occurred at mid-blocks in Beijing. Since the high frequency and fatality risk, this study focused on pedestrian accidents taking place at mid-blocks and aimed at identifying significant factors. Methods: Based on total 10,948 crash records, a binary logit model was established to explore the impact of various factors on the probability of pedestrian’s death. Furthermore, first-degree interaction effects were introduced into the basic model. The Hosmer-Lemeshow goodness-of-fit test was used to assess the model performance. Odds ratio was calculated for categorical variables to compare significant accident conditions with the conference level. Variables within consideration in this study included weather, area type, road type, speed limit, pedestrian location, lighting condition, vehicle type, pedestrian gender and pedestrian age. Results: The calibration results of the model show that the increased fatality chances of an accident at mid-blocks are associated with normal weather, rural area, two-way divided road, crossing elsewhere in carriageway, darkness (especially for no street lighting), light vehicle, large vehicle and male pedestrian. With road speed limit increasing by 10 km/h, the probability of death accordingly increases by 46%. Older victims have higher chances of being killed in a crash. Moreover, three interaction effects are found significant: rural area and two-way divided, rural area and crossing elsewhere as well as speed limit and pedestrian age. Conclusions: This study has analyzed police accident data and identified factors significant to the death probability of pedestrians in accidents occurred at mid-blocks. Recommendations and improving measures were proposed correspondingly. Behaviors of different road users at mid-blocks should be taken into account in the future research.
A Study on the Process Oriented Evaluation System of Undergraduate Training Programs for Innovation and Entrepreneurship  [PDF]
Yanyan Sheng, Qiushan Yu, Liyou Chen
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.715225
Abstract: The current evaluation system of College Students’ innovation and entrepreneurship training program is not conducive to the healthy development of the training project, such as heavy project, light process and fuzzy evaluation subject. In order to improve the implementation of the training program, process oriented evaluation system should be established, concluding indicators selected from initiation process, operation process and final process, and weights are calculated by Delphi method. Process management and classified criterion to finish process are suggested to improve the effectiveness of College Students’ innovation and entrepreneurship training program.
Early Warning Information Releasing System Based on Adaptive Grouping
Suting Chen,Zhang Yanyan
Information Technology Journal , 2011,
Abstract: A design scheme of message transmission in business information channel of DAB (Digital Audio Broadcasting) transmitter was presented based on the structure of DAB information channel. According to the demand of diversity, real-time and intelligence for transmitting message by DAB, an adaptive packet mode of transport mechanism is put forward to release various text messages (weather warning information, traffic information, etc.) through DAB transmitting system aimed at MOT (Multimedia Object Transfer) protocol. Through the method of adaptive grouping, flexibility and capacity utilization of sub-channels in DAB transmission system are improved greatly. Thus, it is convenient for transfer various early warning information efficiently. The encoding scheme based on adaptive grouping has been achieved through DAB system at present.
Research on the Drunk Driving Traffic Accidents Based on Logistic Regression Model  [PDF]
Shaohua Wang, Yanyan Chen, Jianling Huang, Yuyang Zhou, Yao Lu
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.811039
Abstract: Most of the current studies on drunk driving accidents focus on law making and public education. However, especially in China, there is less statistical analysis on the severity of drunk driving accidents between driving under the influence of alcohol (DUI) and driving while intoxicated (DWI). 3368 drunk driving related crashes were collected from the blood-alcohol test report in a city of China at 2012 and 2013. After data pre-processing, Chi-square tests were used to analyze the association between different variables and the type of drunk driving. The logistic regression model is conducted to estimate the effect of the variables under DUI and DWI. The results show that Hour of the day, Driver’s age, Driver’s casualties and Accident area have significant correlation with drunk driving. There was a slightly decrease by 0.995 per year with age and a slightly increase by 1.014 with time in the possibility of DWI. DWI is more likely to cause death in traffic accidents (OR = 1.316) than DUI. Driver’s deaths (OR = 2.346) is more likely to happen than the injuries (OR = 1.910) under DWI cases. These findings show that more attention should be paid to strengthen controls on the DWI. It also can provide important basis for accident prevent, traffic law enforcement and traffic management.
The impact of academic stress on medical students attending college in the Inner Mongolia Area of China  [PDF]
Jie Chen, Yanyan Wu, He Yi, Zhijun Li, Yuki Eshita, Peng Qin, Lifu Chen, Juan Sun
Open Journal of Preventive Medicine (OJPM) , 2013, DOI: 10.4236/ojpm.2013.32019
Abstract:

The aim of this study was to examine whether student characteristics affect the risk of health conditions, and explore whether the degree of academic stress affects the level of distress. We surveyed medical students in the Inner Mongolia Medical College China using a questionnaire. A logistic regression analysis was used to ascertain factors associated with distress. The Wilcoxon Mann-Whitney test was used to determine the relationship between distress and different academic stress levels. Of the 6044 students completing questionnaires, 47.5% self-reported distressing body symptoms induced by academic stress. Chi square tests showed statistically significant associations between distress and gender, academic stress, and residence; feeling academic stress caused a more than 1.5 times risk of distress. Gender and academic stress were significantly associated with distress in non-conditional binary logistic regression models. Compared with male students, female students was more likely to feel distress. The Wilcoxon Mann-Whitney test also showed that the distress rate increased with academic stress and a dose-response relationship between the distress rate and stress level was found. The present study indicates that it is important to reduce academic stress and manage it in order that better outcomes be achieved in regard to distress, especially in females.

Parameterized Local Reduction of Decision Systems
Degang Chen,Yanyan Yang,Xiao Zhang
Journal of Applied Mathematics , 2012, DOI: 10.1155/2012/857590
Abstract: One important and valuable topic in rough sets is attribute reduction of a decision system. The existing attribute reductions are designed to just keep confidence of every certain rule as they cannot identify key conditional attributes explicitly for special decision rules. In this paper, we develop the concept of -local reduction in order to offer a minimal description for special -possible decision rules. The approach of discernibility matrix is employed to investigate the structure of a -local reduction and compute all -local reductions. An example of medical diagnosis is employed to illustrate our idea of the -local reduction. Finally, numerical experiments are performed to show that our method proposed in this paper is feasible and valid.
4′-Chloro-3′,5′-dimethoxyacetanilide
Huiyu Li,Yanyan Zhu,Zhonghua Chen
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809013166
Abstract: The title compound, C10H12ClNO3, crystallizes with four independent molecules in the asymmetric unit which are linked by intermolecular N—H...O hydrogen bonds.
Research on the CORBA Implementation Mechanism of a New Industrialized PL-ISEE
Jianli Dong,Ningguo SHI,Yanyan CHEN
Journal of Software , 2012, DOI: 10.4304/jsw.7.5.1171-1176
Abstract: Borrowing the automation production and management system of modern manufacturing industry production line, a new industrialized PL-ISEE (product line based integrated software engineering environment) architecture was proposed by us in the reference [6]. This kind of new architecture model is a hiberarchy double development environment model with the product line core assets as the software components bus. The upper part on the bus is the software product line development environment to achieve the assembly line production of software products; under the bus is a traditional software development environment to achieve the development of core asset component source program and related documents. For this new PL-ISEE model, its implementation framework and mechanisms as well as methods based on the CORBA are further proposed and studied in this paper. Such the implementation of the new PL-ISEE and own developing abilities are similar to the assembly line and management system of modern manufacturing industry, and it will be an ideal production environment of computer software industry and pattern of software engineering in the future.
Forecasting Cohesionless Soil Highway Slope Displacement Using Modular Neural Network
Yanyan Chen,Shuwei Wang,Ning Chen,Xueqin Long
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/504574
Abstract:
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