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.
Wind power is a challenge for active operation of distribution networks because of its stochastic nature. In this paper, a two-stage stochastic-programming-based optimal power flow model is proposed for the short-term operation (e.g., 1 h ahead) of distribution networks with wind power. In this model, the wind power is dispatched in the first stage, and then, in the second stage, not only the additional...
In this letter, a new band-notched ultra wideband (UWB) antenna based on electromagnetic band gap (EBG) technology has been designed and analyzed. The EBG structure is applied in a UWB antenna to create a stop band and it is located between the microstrip feedline and the ground plane. EBG characteristics, such as the reflection phase and the transmission coefficient S21, are studied. At the end of...
Some countries in the world have different the degree of fires every year, it caused the serious damage to the ecological environment, not only losing huge resources, but wasting a lot of manpower and material resources. A new approach to forecast fire information is presented in this paper, which will provide efficient theoretical support and technical guidance.
Ecological Security Assessment is a new field in Sustainable Development study. In order to curb the deterioration of the ecological environment, we should conduct timely researches on the comprehensive evaluation of ecological security, which is recognized as the most powerful method to protect the regional economy effectively. Based on the sequence data of 1987, 2000 and 2005, the study takes Hebei...
This paper investigates how to establish a performance evaluation system mainly based on the knowledge contribution of the staff in the knowledge management information platform of project management enterprise. First, the necessity of creating knowledge-based enterprise was analyzed and many existing problems about how to value contribution to the knowledge of the staff were discussed in the current...
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.