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Search Results: 1 - 10 of 127263 matches for " Yongmei Li "
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Further Generalization of Some Double Integral Inequalities and Applications
Wenjun Liu, Chuncheng Li and Yongmei Hao
Abstract: . Further generalization or improvement of some double integral inequalities are obtained. Applications in numerical integration are also given.
An applied research on remote sensing classification in the Loess Plateau

LIU Yongmei,TANG Guoan,LI Tianwen,

地理学报 , 2003,
Abstract: Due to complex terrain of the Loess Plateau, the classification accuracy is unsatisfactory when a single supervised classification is used in the remote sensing investigation of the sloping field. Taking the loess hill and gully area of northern Shaanxi Province as a test area, a research was conducted to extract sloping field and other land use categories by applying an integrated classification. Based on an integration of supervised classification and unsupervised classification, sampling method is remarkably improved. The results show that the classification accuracy is satisfactory by the method and is of critical significance in obtaining up-to-date information of the sloping field, which should be helpful in the state key project of converting farmland to forest and grassland on slope land in this area. This research sought to improve the application accuracy of image classification in complex terrain areas.
Eukaryotic Promoter Predication Based on Principal Component Analysis
Xiaomeng Li,Yongmei Liu,Hong Yan
Lecture Notes in Engineering and Computer Science , 2008,
Further Generalization of Some Double Integral Inequalities and Applications
Wenjun Liu,Chuncheng Li,Yongmei Hao
Abstract: Further generalization or improvement of some double integral inequalities are obtained. Applications in numerical integration are also given.
A Quasi-Newton Population Migration Algorithm for Solving Systems of Nonlinear Equations
Hongxia Liu,Yongquan Zhou,Yongmei Li
Journal of Computers , 2011, DOI: 10.4304/jcp.6.1.36-42
Abstract: In this paper, the problem on solving nonlinear equations is transformed into that of function optimization. A new Quasi-Newton Population Migration Algorithm (QPMA) is proposed via combination of population migration algorithm and Quasi-Newton method. The algorithm has the advantages of the Population Migration Algorithm (PMA) such as region search in a certain extent and avoid getting into the local optimum and the Quasi-Newton method such as Quasi-Newton’s local strong searching. Finally, the numerical experiments result show that this algorithm can find the rapid and effective interval solution and the probability of success is higher.
An iRGD Based Strategy to Study Electrochemically the Species Inside a Cell
Limin Ning,Xiaoxi Li,Xiaorong Ding,Yongmei Yin,Genxi Li
International Journal of Molecular Sciences , 2012, DOI: 10.3390/ijms130810424
Abstract: This paper reports a method for electrical communication between the inner part of cells and an electrode with the help of iRGD peptide. Due to the enhancement of the cell penetration caused by iRGD peptide, DNA molecules, previously modified on a gold electrode surface, can be easily transfected into the cells. At the same time, doxorubicin, an anticancer drug, can also be transfected into cells with high penetration. Consequently, doxorubicin binds to DNA chains through electrostatic interaction, and the redox reaction is transferred out of the cell across the cell membrane. As a result, this work may provide a novel way to get information from inside of cells.
Relationship of Post-Stroke Aphasic Types with Sex, Age and Stroke Types  [PDF]
Jingfan Yao, Zaizhu Han, Yanli Song, Lei Li, Yun Zhou, Weikang Chen, Yongmei Deng, Yongjun Wang, Yumei Zhang
World Journal of Neuroscience (WJNS) , 2015, DOI: 10.4236/wjns.2015.51004
Abstract: Aim: To explore what is the relationship of the types of post-stroke aphasia with sex, age and stroke types. Methods: Retrospective analysis was administrated on data of 421 patients with acute stroke. Western battery aphasia was used to measure aphasiac type and aphasia quotient (AQ) score. The patients were divided into three age groups: young, middle-aged and elderly. The stroke types were classified into cerebral infraction (CI) and intracerebral hemorrhage (ICH). Results: All subjects were right-handed, which males and females accounted for 69.60% and 30.40%, respectively. There were 116 cases of Broca’s aphasia (85 males), 35 cases of Wernicke’s aphasia (20 males), 15 cases of conductive aphasia (10 males), 63 cases of transcortical motor aphasia (50 males), 11 cases of transcortical sensory aphasia (8 males), 27 cases of transcortical combined aphasia (13 males), 73 cases of anomic aphasia (47 males) and 81 cases of global aphasia (60 males). Male patients (69.60%) have a significantly higher morbidity of aphasia than that of females (30.40%) after stroke (χ2 = 11.57
Exhaust emission characteristics of diesel and biodiesel  [PDF]
Yongmei Zhang, Hongjun You
Advances in Biological Chemistry (ABC) , 2011, DOI: 10.4236/abc.2011.13014
Abstract: The performances of diesel contrasted with that of biodiesel, such as HC and CO and NOx and fume and particles discharge, are studied on. The contents of HC, CO, NOx and flue gas are measured by Japan 163 Gas Chromatograph, USA 48 CO Analyser, Japan MEXA-7200H and FBY-201 flue gas analyzer, respectively. The experimental results shows HC dis-charge of biodiesel B20 decreases with the increase of rate of revolution; NOx discharge of biodiesel B5 and biodiesel B20 increase with the increase of torque; NOx discharge increases with the increase of adding biodiesel at the same torque; Flue gas discharge of biodiesel B5 and biodiesel B20 firstly increase and then decrease with the increase of torque; Particle discharge decreases with the increase of the amount of biodiesel.
Modeling and Solution of Economic Dispatch Problem for GTCC Units  [PDF]
Yongmei Wang, Hua Xiao
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B058
Abstract: Economic dispatch problem lies at the kernel among different issues in GTCC units’ operation, which is about minimizing the fuel consumption for a period of operation so as to accomplish optimal load dispatch among units. This paper has analyzed the load dispatch model of gas turbine combined-cycle (GTCC) units and utilizes a quantum genetic algorithm to optimize the solution of the model. The performance of gas turbine combined-cycle units varies with many factors and this directly leads to variation of model parameters. To solve the dispatch problem, variable constraints are adopted to correct the parameters influenced by ambient conditions. In the simulation, comparison of dispatch models for GTCC units considering and not considering the influence of ambient conditions indicates that it is necessary to adopt variable constraints for the dispatch model of GTCC units. To optimize the solution of the model, a Quantum Genetic Algorithm is used considering its advantages in searching performance. QGA combines the quantum theory with evolutionary theory of genetic algorithm. It is a new kind of intelligence algorithm which has been successfully employed in optimization problems. Utilizing quantum code, quantum gate and so on, QGA shows flexibility, high convergent rate, and global optimal capacity and so on. Simulations were performed by building up models and optimizing the solutions of the models by QGA. QGA shows better effect than equal micro incremental method used in the previous literature. The operational economy is proved by the results obtained by QGA. It can be concluded that QGA is quite effective in optimizing economic dispatch problem of GTCC units.
Empirical Research on Relationship of Caddies’ Reward Satisfaction, Organizational Commitment and Turnover Intention  [PDF]
Xu Yongmei, Jiang Jiankai
Chinese Studies (ChnStd) , 2015, DOI: 10.4236/chnstd.2015.42009
Abstract: Based on the situation of turnover of golf caddies, we study the relationship of caddies’ reward satisfaction, organizational commitment, and turnover intention in Shenzhen, China. The research shows that 1) caddies’ gender, education, grade, and years of working make a significant difference in turnover intention; 2) caddies’ reward satisfaction has a significant positive impact on organizational commitment, caddies’ reward satisfaction, organizational commitment has a significant negative impact on turnover intention, and affective commitment and continuance commitment have a significant negative impact on turnover intention; 3) caddies’ organizational commitment tends to mediate between the relationship of reward satisfaction and turnover intention. This paper also proposes some recommendations to improve caddies’ reward satisfaction, organizational commitment, and reduce the turnover intention for golf club managers.
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