The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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.
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...
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...
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...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.