search vt. 1.搜查;檢查(身體、衣袋等);搜索,搜尋;找;尋找。 2.調(diào)查;查究;探求;追求;根究 (into)。 3.(冷風(fēng)等)到處侵入,刺透。 4.【軍事】使(火力)向縱深展開。 search sb. 搜查身體。 search a book 在一本書里查找材料。 search one's memory 竭力回憶。 The shrapnel was searching every cranny. 榴霰彈正在四散開來。 vi. 1.搜尋,搜查 (for);探求。 2.【計(jì)算機(jī)】覓數(shù),檢索。 search after [for] 尋找;尋求,追求;探求 (search after health 講究健康;保養(yǎng)。 search a house for papers 在一座房屋里搜查文件)。 search into 調(diào)查;研究;根究。 S- me! 〔美國〕我不知道。 search out 搜出;查出;探出;找出。 n. 1.搜索;搜尋;尋找。 2.探索;探求 (after for) 調(diào)查;檢查。 in search of 尋找;去找;追求;為了尋求;試圖發(fā)現(xiàn)。 make a search after (去)找;尋求;追求。
To validate the performance of the proposed scheme , the scheme is simulated with fpga , and the simulation result indicates that compared with the conventional pn acquisition schemes , the pn acquisition using auxiliary sequence and binary search can decrease the acquisition time greatly on the same condition 同時(shí),為了進(jìn)一步驗(yàn)證該同步捕獲方案的捕獲性能,文中采用fpga器件對(duì)捕獲方案進(jìn)行仿真,分析結(jié)果表明:與傳統(tǒng)的序列捕獲方案相比,基于輔助序列和二分法的同步捕獲方案可以在系統(tǒng)復(fù)雜度和性能不變的前提下,大大縮短捕獲時(shí)間,實(shí)現(xiàn)擴(kuò)頻序列的快速捕獲。
In this paper , a lot of researches and exploration are applied to studying the universality and expansibility of hardware and the arithmetic design and code optimization of software . especially , all of the following arithmetics or conceptions are worked out in the research of software design : self - adaptable compression arithmetic based on dictionary model for data collection system , similarity full binary sort tree , a optimized quick search arithmetic and an improved arithmetic of multiplication in the floating - point operation . and all of the arithmetic are designed with mcs - 51 assembly language . the quick search arithmetic , in which merits of both binary search and sequence search are used fully , are based on the specialty of preorder traversal in similarity full binary sort tree 特別在軟件設(shè)計(jì)研究中,提出了適用于數(shù)據(jù)采集系統(tǒng)的數(shù)據(jù)壓縮算法? ?基于字典模型的自適應(yīng)壓縮算法;提出了類滿二叉排序樹的定義;提出了基于類滿二叉排序樹的先序遍歷特性的最優(yōu)化快速查找算法,它充分利用了折半查找和順序查找各自的優(yōu)點(diǎn);提出了浮點(diǎn)運(yùn)算乘法的改進(jìn)算法;并在mcs - 51匯編語言層次上對(duì)所有的算法加以實(shí)現(xiàn)。
Because of the reason above , a novel pn acquisition method using auxiliary sequence and binary search is proposed . because the cross correlation between auxiliary sequence and spread sequence is linear , some search algorism can be used to estimate the phase of incoming signal quickly without increasing the complexity of system 因?yàn)檩o助序列與擴(kuò)頻序列的相關(guān)函數(shù)近似滿足線性單調(diào)性,可以利用快速搜索算法,如:二分法,對(duì)接收信號(hào)中擴(kuò)頻序列的相位進(jìn)行快速搜索,在保證系統(tǒng)復(fù)雜度不變的前提下,降低序列捕獲的時(shí)間。