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Search Results: 1 - 10 of 104299 matches for " Mingwang Zhang "
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Determinants of IT Innovation Diffusion from Dynamic Perspective—Review and Prospects  [PDF]
Mingwang Lei
Technology and Investment (TI) , 2016, DOI: 10.4236/ti.2016.71001
Abstract: The research on information technology (IT) innovation at organizational level has gained plentiful and substantial achievements; existing research in this field presents the pattern of perspective diversification. This paper first introduces the concept of IT innovation and innovation diffusion, and then reviews five dynamic perspectives on the study of the influence factors of IT innovation diffusion, which are organizational learning, social contagion, management fashion, organizing vision and computerization movement. Suggestions and expectations are presented at the end of this paper.
Genetic Diversity and Population Structure of Tibetan Pig Inferred from Mitochondrial DNA Sequence Analysis
Mingwang Zhang,Mingzhou Li,Long Jin,Yan Li,Xuewei Li
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.3984.3990
Abstract: Tibetan pig is an endangered plateau type pig breed which distributed mainly in Qinghai-Tibetan Plateau. In present study, researchers analyzed 218 prior published partial mitochondrial D-loop sequences (415 bp) by using phylogenetic, network, mismatch distribution and Analysis of Molecular Variance (AMOVA) analysis to clarify the population differentiation and explore the relationships among populations from different geographical locations of Tibetan pigs. The results revealed a total of 43 haplotypes in 218 samples from seven Tibetan pig populations in which only one common Haplotype (H1) was shared by the seven populations. Haplotype diversity was high (0.889) whereas nucleotide diversity among all individuals was low (0.00534). It is notable that Hezuo Tibetan pigs have 19 unique haplotypes in total 24 haplotypes of 53 individuals with the highest nucleotide diversity (0.00765). Bayesian tree and median joining network procedures carried out on the data showed that seven Tibetan pig haplotypes were essentially indistinguishable except some unique haplotypes from Hezuo. The AMOVA analysis indicated that the genetic variation mainly occurred within populations (85.41%) but variance among populations was only 14.59%. The unimodal mismatch distribution of haplotypes, together with significant negative values of Fu s FS and negative values of Tajima s D suggest that a recent population expansion of Tibetan pig has been occurred in Diqing, Hezuo and total population.
Effect of Pleistocene Climatic Oscillations on the Phylogeography and Demography of Red Knobby Newt (Tylototriton shanjing) from Southwestern China
Guohua Yu, Mingwang Zhang, Dingqi Rao, Junxing Yang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0056066
Abstract: Factors that determine the genetic structure of species in southwestern China remain largely unknown. In this study, phylogeography and demography of Tylototriton shanjing was investigated from a mitochondrial perspective to address the role of the Quaternary ice ages in shaping phylogeographic history and genetic diversity of Yunnan. A total of 146 individuals from 19 populations across the entire range of the species were collected. We detected four maternal phylogenetic lineages corresponding to four population groups, and found that major glaciation events during the Pleistocene have triggered the intra-specific divergence. Coalescent simulations indicated that the populations retreated to different refugia located in southern Yunnan, northwestern Yunnan, the border region of western Yunnan with Myanmar, and middle-western Yunnan, respectively, during previous glacial periods in the Pleistocene, and these four refugia were not retained during the Last Glacial Maximum. Population expansions occurred during the last inter-glaciation, during which ice core and pollen data indicated that the temperature and precipitation gradually increased, and declines of population sizes started after the beginning of the Last Glacial Maximum when the climate became cooler and dryer. The paleo-drainage system had no contribution to the current genetic structure and the rivers were not dispersal barriers for this salamander.

Zhang Mingwang Huang Chongchao,

计算数学 , 2004,
Abstract: In this paper, a new interior point algorithm-high-order affine scaling for a class of nonmonotonic linear complementary problems is developed . On the basis of idea of primal-dual affine scaling method for linear programming , the search direction of our algorithm is obtained by a linear system of equation at each step . We show that, by appropriately choosing the step size, the algorithm has polynomial time complexity. We also give the numberical results of the algorithm for two test problems.
Numerical Realization of the Continuous-Time ELS Identification for Continuous Systems with Correlative Disturbances

Zhao Mingwang,

自动化学报 , 1997,
Abstract: Firstly,the continuous time ELS identificaiton method for stochastic continuous systems with correlative disturbances are reviewed.Then two numerical realization methods for the ELS method and their simulation results are given based on the numerical integral,and Euler method and Runge Kutta method for ordinary differential equations.
Simultaneous Stabilizatin in Kharitonov Space for Linear Systems With Same Orders

Zhao Mingwang,

自动化学报 , 1997,
Abstract: According to Kharitonov theorem, an expected characteristic polynomial of the close loop systems is given and the simultaneous stabilization problem of linear systems with same order is transformed into solving problem of a set of inequalities. And then a linear programing method for the inequalities is studied and third kinds of solutions of the problem and their properties are discussed. Examples demonstrate the effectiveness of the stabilization method.
Numerical Methods for Fault-Tolerance Control Against Sensor Faults

Zhao Mingwang,

自动化学报 , 1998,
Abstract: For the fault-tolerance control against sensor faults in linear state feedback systems, sufficient and necessary conditions that make the closed--loop systems stable are proposed based on the fractionization method of the stable polynomials. Then, a designing method of the fault-tolerance state feedback law is presented via the numerical solutions to the nonlinear equations. Finally, based on the nonlinear optimization technique, another designing method of the fault-tolerance state feedback law for pole placement of the closedloop systems is proposed. Computer simulation examples show the effectiveness of these fault -tolerance control methods.

ZHAO Mingwang,

软件学报 , 1997,
Abstract: Through embedding a Newtonian operator into the genetic algorithm and defining a proper fitness and a numerical structure, a hybrid computational-intelligent algorithm for the global solution of the nonlinear least-squares problem, combined the advances of both of the genetic algorithm and the Newtonian algorithm, is got with the faster convergence and the greater probability for the global solution. The numerical results show that the method is distinctly superior to the genetic algorithm and the Newtonian algorithm.
Modeling and Accomplishment of Loading-and-Unloading Equipment Optimum Allocation System at Bulk Terminal
Xueping Wang,Lei Wu,Mingwang Dong
International Journal of Computer Network and Information Security , 2011,
Abstract: The configuration of port’s loading-and-unloading equipment is an optimization problem, which endeavors to put limited handling equipment to each operating line to achieve the maximum overall production efficiency. We set up the T-stage decision-making model of loading-and-unloading line equipment configuration by using the method of Multi-stage Decision, and design the algorithm of the mathematical model. Research results in this paper lay the foundation for the development of loading-and-unloading equipment configuration system, and provide scientific basis for the decision of type selection and rational quantity of loading-and-unloading equipment.
Mitochondrial DNA Evidence Indicates the Local Origin of Domestic Pigs in the Upstream Region of the Yangtze River
Long Jin, Mingwang Zhang, Jideng Ma, Jie Zhang, Chaowei Zhou, Yingkai Liu, Tao Wang, An-an Jiang, Lei Chen, Jinyong Wang, Zhongrong Jiang, Li Zhu, Surong Shuai, Ruiqiang Li, Mingzhou Li, Xuewei Li
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051649
Abstract: Previous studies have indicated two main domestic pig dispersal routes in East Asia: one is from the Mekong region, through the upstream region of the Yangtze River (URYZ) to the middle and upstream regions of the Yellow River, the other is from the middle and downstream regions of the Yangtze River to the downstream region of the Yellow River, and then to northeast China. The URYZ was regarded as a passageway of the former dispersal route; however, this assumption remains to be further investigated. We therefore analyzed the hypervariable segements of mitochondrial DNA from 513 individual pigs mainly from Sichuan and the Tibet highlands and 1,394 publicly available sequences from domestic pigs and wild boars across Asia. From the phylogenetic tree, most of the samples fell into a mixed group that was difficult to distinguish by breed or geography. The total network analysis showed that the URYZ pigs possessed a dominant position in haplogroup A and domestic pigs shared the same core haplotype with the local wild boars, suggesting that pigs in group A were most likely derived from the URYZ pool. In addition, a region-wise network analysis determined that URYZ contains 42 haplotypes of which 22 are unique indicating the high diversity in this region. In conclusion, our findings confirmed that pigs from the URYZ were domesticated in situ.
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