In this article, we describe the two new commands cngcode and cnaddress, which can be used to link Chinese addresses to locations defined by their longitudes and latitudes through Baidu Map API v3.0 ( http://api.map.baidu.com ), an online map and navigation system widely used in China. cngcode transfers Chinese addresses to locations, whereas cnaddress does the opposite. These two commands make it easier with Stata to deal with addresses and locations in China.
A caching model is proposed to accelerate the I/O speed between disks and FPGA devices in the conditions of reconfigurable computing. Especially the speed of FPGA processing is much larger than the RAID reading rate. The accelerating strategy is based on LRU-MRU replacement, adding physical address factors at the same time. In the case of twocache application mode, the accelerating strategy, according to the characteristics of FPGA application, can accelerate 5% comparing with the traditional LRU-MRU algorithm. Through the quantitative analysis of this algorithm, we propose the cache optimization model of small file to improve disk read rate for FPGA computation.Keywords-cache replacement algorithm; physical address; LRU-MRU; RAID FPGA I.
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