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In this paper, an effective filter in RFID data process is proposed. In the progress of updating barcode system to RFID system, many commercial systems need the RFID middleware transmitting the processed data of one commercial operation to the application business logic layer in one time automatically. In this way, the modification or change of some current commercial systems will be little, and cost...
The benefit of multi-version file system is high reliability. File versioning can be used for file-oriented recovery from deletion and limiting exposure to data losses during file system failure. The problem is that accesses to versions in the distant past may be prohibitively expensive. We adopt the hierarchical architecture in version space to reduce the time spent on search; We present a new structure...
The satellite “Tance 1” of the “Double-Star Program” is the first truly scientific experimentation satellite of China. Its orbit is the farthest so far launched in China, with a geocentric apogee reaching 78 thousand kilometers. The tracking of “Tance 1” and of more distant space targets, such as the lunar exploration craft, can be realized with the VLBI technique of radio astronomy. In order to test...
Today more and more WWW applications ask for basically non-stop services around the clock. Finding a good highly available scheme for a cluster web server becomes very important. Web server clusters with different data replica distribution pattern have different data availability level. Therefore our research focuses on data replica distribution pattern. After making theoretical analysis on data replica...
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