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Cooperation and Competition Strategy Analysis of Decision-Making Units Based on Efficiency Game

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Journal of Systems Science and Systems Engineering 2020年第2期29卷 235-248页

作者： li cao Zhanxin Ma Muren School of Mathematics Science Inner Mongolia UniversityHohhot 010021China College of Computer and Information Inner Mongolia Medical UniversityHohhot 010051China School of Economics and Management Inner Mongolia UniversityHohhot 010021China Key Laboratory of Rail Transit Beijing Jiaotong UniversityBeijing 100044China School of Economics and Management Inner Mongolia University of TechnologyHohhot 010110 China

Data envelopment analysis(DEA)method based on game theory effectively ranks the decisionmaking units(DMUs)by the view of cooperation or *** DEA method based on partial ordered set theory depicts the relationships among ***,these methods are unable to reveal the complex cooperation and competition relationships among *** this paper,an optimal model for DMU group game strategy is proposed based on the generalized DEA method and game *** to this model,we can effectively depict the efficiency change of ***,the effect of various game relationships on individual and the union of DMUs can be *** is of positive significance for decision makers to find partners and moderate the cooperation and competition situation of their ***,the cooperation and competition relationships of 9 express enterprises in a certain area in China are analyzed by using the method proposed in this paper.

关键词： Generalized DEA game theory cross efficiency cooperation and competition

Effects of Perfectly Correlated and Anti-Correlated Noise in a Logistic Growth Model

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Communications in Theoretical Physics 2011年第3期55卷 462-464页

作者： ZHANG li cao li College of Biomedical Engineering South-Central University for Nationalities Wuhan 430074 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

The logistic growth model with correlated additive and multiplicative Gaussian white noise is used to anedyze tumor cell population. The effects of perfectly correlated and anti-correlated noise on the stationary properties of tumor cell population are studied. As in both cases the diffusion coefficient has zero point in real number field, some special features of the system are arisen. It is found that in cause tumor cell extinction. In the perfectly anti-correlated tumor cell population exhibit two extrema. both cases, the increase of the multiplicative noise intensity case, the stationary probability distribution as a function of

关键词： logistic growth model perfectly correlated noise perfectly anti-correlated noise

The Effects of Metal Ions and Secondary ligands on the Formation of Structures Resulted from Flexible Building Blocks

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Chinese Journal of Structural Chemistry 2005年第12期24卷 1462-1467页

作者： li Feng li Tao-Hai cao Rong State Key Laboratory of Structural Chemistr3 Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fujian Fuzhou 350002 China

Two coordination polymers have been synthesized from cpg/4,4＇-bipy/metal ions reaction system, [Zn（cpg）（4,4＇-bipy）0.5（H2O）]·H2O 1 and [Cd（cpg）（4,4＇-bipy）0.5（H2O）2]·H2O 2. X- ray analyses show that different coordination geometries of zinc and cadmium ions lead to similar ladder structures （tetra-for zinc ion and hexa- for cadmium ion）, in which all the flexible cpg molecules exist as single conformations of anti-form.

关键词： hydrothermal synthesis flexible ligand prediction

Dimensional Results for Cartesian Products of Homogeneous Moran Sets

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Acta Mathematicae Applicatae Sinica 2012年第4期28卷 673-680页

作者： li cao Xing-Gang HE School of Mathematics and Statistics Wuhan University College of Mathematics and Statistics Central China Normal University

M（J, {ms ＊ ns}, {Cs}） be the collection of Cartesian products of two homogenous Moran sets with the same ratios {cs} Where J = [0, 1] × [0, 1]. Then the maximal and minimal values of the Hausdorff dimensions for t... 详细信息

关键词： Homogeneous Moran sets Cartesian product Hausdorff dimension

An electrochemical method for evaluating the resistance to cathodic disbondment of anti-corrosion coatings on buried pipelines

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Journal of University of Science and Technology Beijing 2007年第5期14卷 414-419页

作者： Chan li Bei cao Yinshun Wu Materials Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

Methods for evaluating the resistance to cathodic disbondment （RCD） of anti-corrosion coatings on buried pipelines were reviewed. It is obvious that these traditional cathodic disbondment tests （CDT） have some disadvantages and the evaluated results are only simple figures and always rely on the subjective experience of the operator. A new electrochemical method for evaluating the RCD of coatings, that is, the potentiostatic evaluation method （PEM）, was developed and studied. During potentiostatic anodic polarization testing, the changes of stable polarization current of specimens before and after cathodic disbonding （CD） were measured, and the degree of cathodic disbondment of the coating was quantitatively evaluated, among which the equivalent cathodic disbonded distance AD was suggested as a parameter for evaluating the RCD. A series of testing parameters of the PEM were determined in these experiments.

关键词： buried pipeline anti-corrosion coating resistance to cathodic disbondment (RCD) potentiostatic evaluation method(PEM) fusion bonded epoxy (FBE) three-layer polyethylene (3PE)

Determining the Cosmic Equation of State from Gravitational Lensing

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Chinese Physics Letters 1999年第12期16卷 934-936页

作者： ZHU Zong-hong cao li Beijing Astronomical Observatory Chinese Academy of SciencesBeijing 100012 National Astronomical Observatories Chinese Academy of SciencesBeijing 100012

An independent method is proposed to determine the equation of state, ωx ≡ px/ρx, for the dark energy component in the universe. This method is based on gravitational lensing statistics. An analytically simple expression for the optical depth of gravitational lensing in general Friedmann-Robertson- Walker cosmologies with dark energy component is derived. It is shown that for a flat universe the optical depth depends sensitively on the redshift to the source zs and the equation of state ωx which makes the method proposed here efficient and robust.

关键词： gravitational universe source

Evaluation of Population Structure, Genetic Diversity and Origin of Northeast Asia Weedy Rice Based on Simple Sequence Repeat Markers

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Rice science 2015年第4期22卷 180-188页

作者： li Mao-bai WANG Hui cao li-ming Shanghai Academy of Agricultural Sciences Seed Management Station of Shanghai

Weedy rice exerts a severe impact on rice production by competing for sunlight, water and nutrients. This study assayed the population structure, genetic diversity and origin of Northeast Asia weedy rice by using 48 simple sequence repeat markers. The results showed that weedy rice in Northeast Asia had a high genetic diversity, with Shannon＇s diversity index （I） of 0.748 and the heterozygosity （He） of 0.434. In each regional population, I value varied widely. The widest range of I （0.228-0.489） was observed in the weedy rice of Eastern China, which was larger than that of Northeast China and Korea （0.168-0.270）. The F-statistics of regional populations （Fis, Fit and Fst） also showed higher values in the weedy rice of Eastern China than those of Northeast China and Korea All weedy rice accessions were grouped into two clusters in the unweighted pair group method with arithmetic mean cluster analysis dendrogram, namely Eastern China branch and Northeastern China plus Korea branch. There was significant differentiation in genetic characteristics in weedy rice of northeastern and eastern Asia, especially in Eastern China.

关键词： weedy rice simple sequence repeat genetic diversity population structure weed control

Effecfs of Cross-Correlation Between Real Noise in Transient Process of Single-Mode and Imaginary Parts of Colored Pump Laser

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Communications in Theoretical Physics 2006年第4X期46卷 651-655页

作者： ZHANG li cao li WU Da-Jin College of Electronics and Information Engineering South-Central University for Nationalities Wuhan 430074 China State Key Laboratory of Laser Technology Huazhong University of Science and Technology Wuhan 430074 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China

A two-dimensional single-mode laser model with cross-correlation between the real and imaginary parts of the colored quadric pump noise is investigated. A novel laser amplitude Langevin equation is obtained, in which the cross-correlation λp between the real and imaginary parts of the pump noise appears. The mean, variance, and skewness of first-passage-time are calculated. It is shown that the mean, variance, and skewness of first-passage-time are strongly affected by λp.

关键词： single-mode laser colored quadratic pumps noise cross-correlation between the real and imaginary parts Of pump noise

China's meat and grain imports during 2000–2012 and beyond: A comparative perspective

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Journal of Integrative Agriculture 2015年第6期14卷 1101-1114页

作者： YU Wu-sheng cao li-juan Department of Food and Resource Economics University of Copenhagen College of Economics and Management Nanjing Agricultural University China Center for Food Security Research Nanjing Agricultural Universtiy

This paper provides a review on China＇s meat trade for the 2000–2012 period and discusses its future development, with reference to China＇s grain trade. With marginal decreases in meat exports and slight increases in their imports, China＇s net imports of major meat products（including pork, beef, mutton and poultry but excluding meat offal） were just below 1 million tons in 2012, dwarfed by China＇s net imports of grains which reached 66.7 million tons in the same year. This slow growth in meat trade seems to contradict earlier expectations on increasing meat demand and imports, based upon projected shifts in consumption patterns driven by rapid per capita income growth. Several plausible explanations of this paradoxical trade pattern are offered, including mass imports of feed grains, persistent（but shrinking） gaps between Chinese and international meat prices, tariff barriers, and non-tariff measures. In the near future China may not be able to maintain such a lower profile on the world meat markets, as per capita income is projected to continue to rise and domestic production cost advantages erode due to rising labor costs. A model-based projection exercise indicates that under plausible assumptions China＇s meat imports may rise sharply by 2030.

关键词： imports and beyond tariff prices capita income excluding earlier projection quota