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 order to reduce the switching loss and turn-off voltage spikes, opened current spikes, soft-switching technology has made great progress in application of switching power supply technology. Zero voltage switching (ZVS) can improve the efficiency of switching power supply and realize the high frequency switch power supply. The method based on the ZVS boost step-up converter circuit is proposed....
With the rapid growth of web services, more and more users elect to hide their information settings. While this practice protects users' privacy, it also creates highly sparse dataset, which in turn causes cold start problems in Recommender Systems (RS) and leads to poor prediction results. Contextual-aware recommender system (CARS) has been recognized as an efficient solution to address either a...
Cognitive radio networks (CRNs) are expected to improve spectrum utilization significantly by allowing secondary users (SUs) to opportunistically access the licensed spectrum of primary users (PUs). In a CRN scenario consisting of multiple heterogeneously integrated CRNs, the SUs with multiple interfaces may have to conduct spectrum handoff to target subchannels. Jointly considering the interruption...
Hierarchical strategy is widely used in route planning algorithms to improve the computing efficiency. Hierarchical and Partitioned A-star (HPA) algorithm and Highway Hierarchies (HHs) algorithm are two famous algorithms that use the strategy. When use route planning service, both computing efficiency and planning rationality are concerned. Some improvement was taken to make the HAP algorithm more...
When switched reluctance generator (SRG) is operating below its rated speed, the back electromotive force (EMF) may be lower than the excitation voltage, as a result, the phase current will not increase at the generation stage which would reduce the machine utilization coefficient and conversion efficiency of the system. To solve this problem, a variable generation voltage converter is presented in...
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.