3 results about "Data filtering" patented technology

The invention provides an electronic tag data filtering method used for a radio frequency identification middleware. The middleware sequentially filters according to the source, type, coding range, behavior type and entity attribute of an electronic tag. The method comprehensively considers the attribute, behavior information and EPC network information of the tag, greatly reduces the redundant data and realizes the efficient screening of data.

The embodiment of the invention relates to the field of data processing, and discloses a data filtering method, a cache information recording method and a related device. In a part of embodiments of the invention, the data filtering method is applied to a cache server, a first matrix is arranged in the cache server, the numerical value of an element, corresponding to cache information of the cacheserver, in the first matrix is a preset value. The method comprises the following steps: obtaining a failure instruction, Wherein the failure instruction indicates to delete the first cache information; Determining an element corresponding to the first cache information in the first matrix according to a corresponding relation between the cache information and the elements in the first matrix; And determining whether to execute a failure instruction according to the numerical value of the element corresponding to the first cache information in the first matrix. In the implementation, the frequency of executing the failure instruction indicating to delete the cache information which is not stored by the cache server by the cache server can be reduced, and the pressure of processing the failure instruction by the cache server is reduced.

The invention discloses a high-precision coming vehicle and running vehicle detection system. The system comprises two laser range finders, a data receiving module, a front-end processing module and astate conversion module which are arranged along the traveling direction of a train; the data receiving module is connected with the two laser range finders respectively, associates the received distance data with the IDs of the laser range finders and the real-time timestamps respectively, and stores qualified data as an original data packet through data verification; the front-end processing module performs data filtering on the received original data packet, and judges whether the corresponding laser range finder is shielded or not according to the distance data, and adds records to form adata packet I; and the state conversion module converts the current system state among idleness, pre-triggering, triggering and post-triggering according to the data in the data packet I in combination with the current system state. The high-precision coming vehicle and running vehicle detection system can effectively eliminate the situations of backing, parking and the like, accurately and efficiently complete the collection of coming vehicle and running vehicle signals, and can provide accurate coming vehicle and running vehicle signals for a test system.