本文首先討論了基于關(guān)鍵詞的信息檢索的基本原理，然后介紹了一種基于FPGA的硬件哈
希算法來(lái)加速信息檢索過(guò)程中的關(guān)鍵詞計(jì)數(shù)工作，最后比較了硬件實(shí)現(xiàn)和軟件實(shí)現(xiàn)完成關(guān)鍵詞計(jì)數(shù)工作所需的時(shí)間，結(jié)果表明在檢索速度方面FPGA技術(shù)優(yōu)于軟件實(shí)現(xiàn)。
關(guān)鍵詞：現(xiàn)場(chǎng)可編程門(mén)陣列；信息檢索；哈希
Abstract：This paper firstly discusses the basic principle of the keywords based information retrieval, and then introduces a hardware hashing algorithm based on FPGA (Field Programmable Gate Arrays) to accelerate the keywords counting operation in an information retrieval process. Finally it presents the comparison of the time cost to complete the keywords counting operation by the means of hardware and software implementation. The result shows that FPGA performs better than the software implementation at the aspect of retrieval speed.
Key words：FPGA；information retrieval；Hashing