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In this paper, we study a modified Leslie-Gower predator-prey model with Holling II type functional response and harvesting terms. By means of the generalized continuation theorem, sufficient conditions for the existence of at least two positive periodic solutions of the model are established.
To investigate the regulation of Ets family transcription factors Ets1 and Ets2 on the development of mouse testis and elucidate the effects of Ets1 and Ets2 on self-renewal and differentiation of spermatogonial stem cells. Mouse testis tissues were collected from specific developmental stages including the postnatal days 1, 5, 10, 15, 20, 25, 30, 35, 40, 50 and 70; busulfan peritoneal injection was...
Chongqing is not only the unique municipality in western China, but also an important economic growth pole and the economic center of Yangtze River. The empirical analysis from 2001 to 2008 shows the value and trends of Environmental and economic benefits, environmental and economic co-ordination degree, comprehensive assessment index of coordinated development showed a steady growth year by year...
This paper takes Hubei Unicom Wuhan Branch as research object.Then customer satisfaction evaluation model and the corresponding evaluation index system of HUWB (short for Hubei Unicom Wuhan Branch) are constructed according to the characteristic of mobile communication industry by designing specific questionnaire and investigation, chooses AHP method to define the weight of each index, and uses the...
Freight traffic flow, triggered by Container logistics park district, has brought significant effect to urban traffic. The article faces the problem of predicting freight traffic flow in constructing container logistics park district during the planning period, and analyzes the influence factors of freight traffic flow in container logistics park district, both internal factors and external factors...
Currently, the reverse logistics of electronic and electrical equipment industry in China is still in its initial stage. Two of the most important factors caused the present situation: one is the difficulty of controlling the massive recovery data and the other is the lack of effective information support for management decision-making. Thus, businesses in this area cry out for a data analysis center...
Industry cluster has been proven to be an effective pattern of regional development in theory and in practice. The agricultural industry cluster plays a positive role in some aspects such as promoting the development of regional economic, improving the overall agricultural productivity and enhancing the competitive advantage of agricultural products. In this study, Hubei Province as the research object,...
This paper uses non-linear programming optimal power flow algorithm with slack constraint to analyze reactive power real-time optimization problems in actual grid. And considering the effect of control action sequence on the optimal control effect, the control strategies of the reactive power real-time optimization control system are improved. The control action sequences in normal and failure circumstance...
Chinese hotel industry is meeting the challenge from international hotel group. A large quantity of remarkable talents is needed. So what standards should be adopted to train hotel employee, was the focus of every hotel. This article contributes to the literature on the study of training needs in hotel human resource management. It reports on an exploratory study of the work of a sample of hotel sales...
With a tremendous growth of online auction researches over the last several years, more and more scholars want to know what factors make individual bidders pay more or less for the same item in online auctions. Following the idea of e-commerce which considers traditional market and e-market as two separate markets, most of the researches focus on the factors of e-market. However, a customer exists...
This paper analyzes the effects of energy price shock from a general equilibrium standpoint. We develop a dynamic stochastic general equilibrium (DSGE) model for the China economy. The model explicitly includes energy in the technology used by domestic firms. By using the quarterly data of 1996-2005 in China, we argue the model is an ideal framework for Chinese energy problem analysis. With the model...
Innovation is the key feature of cluster and the lifeblood of cluster evolution. Synergy and spillover not only promote clusters access to external economy, but also breed clusters with the innovative inert. This makes cluster lose innovation vitality, and in the long term, may lead to technology dependence and technical sluggishness, which ultimately lead to a recession. This paper applies the modularization...
Faced with the evolution of the economic environment, some environmental factors which were easily mastered by enterprises are disintegrating, and the business environment of enterprises are transforming from relatively steady statistic one to more and more complex dynamic one. Today crises have become practically the norm in an environment that is both unstable and unpredictable. Crises have thus...
Logistics has close relation with the development of industries and enterprises, and different logistics development strategies should be planed and implemented for different kinds of industries and enterprises at different developing stage which is a dynamic evolvement process. With the model of industry growth analysis and autoregressive distributed lag (ADL) model, the conclusion is drawn that...
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