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.
The problem of efficiently finding top-k frequent items has attracted much attention in recent yeras. Storage constraints in the processing node and intrinsic evloving feature of the data streams are two main challenges. In this paper, we propose a method to tackle these two challenges based on space-saving and gossip-based algorithms respectively. Our method is implemented on SAMOA, a scalable advanced...
To satisfy the requirements and resolve the existing problems of the relay protection of the distribution system under high distributed generation (DG) penetration level, a regional longitudinal comparison scheme is introduced in this paper. The composition and algorithm of fault directional relay are also discussed. Simulations based on PSCAD show that the fault detection algorithm is correct and...
This paper analyses three existing methods of WSN data storage. Based on disadvantage of data-centric storage(DCS), the shortest path first of DCS(SPF-DCS) is present. Compared to DCS, the advantage of this method is that home node finds only one node as its own replica node. SPF-DCS can reduce communication between home node and other nodes, decrease the power consumption of node and prolong lifetime...
Infrasound is ideally suited to provide essential information of these earthquakes without any invasive measures. This necessitates automatic processing of the data as the captured phenomena need to be sortedbefore further analysis can be undertaken. Extracting the physical characters of different signals by signal processing such as Fourier Transform and Wavelets Transform are generally employed...
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.