碼字首 的英文怎麼說
中文拼音 [mǎzìshǒu]
碼字首
英文
prefix of code word-
The structure of this paper goes like this, the first chapter introduce the development of e - b / l in practice and in laws. and draw a conclution that the electrification of the b / l is a history tide. in the second chapter, on the basic of reseach the security trap in e - b / l running, 1 conclude six security elements of, e - b / l : the liability of the system, the authenticity of dealers ' identity. the integrity and secrecy of electronic data, and the validity and evidence effectiveness of electronic data. from the third chapter to the eighth, 1 reseach these elements one by one. the third chapter introduce the establishment of the e - b / l security system, and some related laws the fourth chapter introduce the certification authority of e - b / l. in the fifth chapter, 1 introduce the encrypt of electronic information and some countries ' control on use / import / export crytography. the sixth chapter introduce the concept and principle of digital signature, and reseach some related legal issues. the seventh chapter reseach the legal demand of validity, then come to a conclution that to establish a independent electronic information system is necessary. in the eighth chapter, 1 reseach some countries " regulation on the evidence effectiveness of electronic data
第二章在分析電子提單運作中的安全隱患的基礎上，歸納出其六大安全要素，即系統的可靠性、交易者身份的真實性、數據電訊的機密性和完整性、數據電訊的合法有效性以及交易者行為的不可抵賴性。第三章到第八章分別對這六大要素進行分析：第三章介紹了電子提單網路安全體系的建立以及系統安全保護法規，第四章則介紹了電子提單的安全認證機構，第五章介紹了信息加密技術以及各國立法對密碼技術的進出口及使用的控制，第六章介紹了數字簽名的概念及原理，並以bolero為例介紹了數字簽名的技術方式，對有關法律問題作了論述；第七章首先論述了電子提單對有效性的法律需求，然後結合國內法和國際規則的規定論證了數據電訊制度產生的必然性；第八章通過對各國立法對電子證據的法律效力的規定，論述了對電子交易至關重要的數據電訊的不可抵賴性。Firstly introduced the basic theory and method with which the analog signal can be convert to digital form, including sampling theory and course, quantification and quantification error, coding, beside those we discussed some applications of sampling technology, the reason of frequency mixture and the method to eliminate it chapter 4 introduced analog mux - switch, for the reason of simpleness we only introduce it briefly
從第3章開始，對數據採集的基本理論進行討論，首先介紹了模擬信號數字化處理中的基本理論、方法，包括采樣過程、采樣定理、量化與量化誤差、編碼，還討論了幾種采樣技術的應用、頻率混淆產生的原因及消除措施。第4章，介紹了模擬多路開關。An article of headgear since ascertained to belong to the much respected clerk of the crown and peace mr george fottrell and a silk umbrella with gold handle with the engraved initials, coat of arms and house number of the erudite and worshipful chairman of quarter sessions sir frederick falkiner, recorder of dublin, have been discovered by search parties in remote parts of the island, respectively, the former on the third basaltic ridge of the giant s causeway, the latter embedded to the extent of one foot three inches in the sandy beach of holeopen bay near the old head of kinsale
搜查隊在本島的偏僻地區發現了一頂帽子，已查明系屬于那位備受尊重的法庭書記喬治弗特里爾640先生還有一把綢面雨傘金柄上鐫刻著都柏林市記錄法官641博學可敬的季審法院院長弗雷德里克福基納爵士姓名的首字盾形紋章以及住宅號碼。也就是說，前者位於巨人堤道642第三玄武巖埂上後者埋在古老的金塞爾海岬643附近霍爾奧彭灣的沙灘深達一英尺三英寸的地方。At first the merits and implementation of the digital pulse compression subsystem are introduced in this paper. then the characteristics of phase coded signals are discussed and the two classic binary phase codes ? ? barker code and m - sequence are dealt with in details in the following
文中首先綜述了數字脈沖壓縮的優點及其實現方法，接著討論了相位編碼信號的特點，並詳細分析了巴克碼和m序列這兩類典型的二相碼信號。The walls of his office at the top of the main building in dublin ' s international financial services centre - the city ' s answer to canary wharf - are lined with cherry wood while his shirt sleeves are held together with personalised cuff - links in the shape of his double - d initials
他的辦公室位於都柏林國際金融服務中心（此地區可與倫敦的新金融區金絲雀碼頭相提並論）主樓的頂層，墻上鋪有櫻桃木，他的襯衫袖子也用袖口鏈扣別在?起，而鏈扣的形狀正是`其名字的首字母雙d 。Based on the ( 3, 1, 5 ) convolution code in digital trunking system, this paper first studied the decoding depth of the convolution code and fund out the right decoding depth for digital trunking system, then proposed a modified viterbi decoding algorithm
本文以數字集群中所用的（ 3 ， 1 ， 5 ）卷積碼為基礎，首先對卷積碼的解碼深度進行了研究，得出適合數字集群系統的解碼深度，然後提出了一種卷積碼的viterbi譯碼的改進演算法。In the beginning, the dissertation gives an overview of digital video system and an introduction of the format of mpeg - 2 transport stream, mpeg - 2 physical interface and frame structure of ds3 stream
文章首先介紹了關于數字電視系統的一些基本概念， mpeg - 2傳送流格式和mpeg - 2的物理介面，以及ds3碼流的幀結構。Firstly, we generalize and analyze the advantages and present research of elliptic curve cryptography ; secondly, we study the basic theory of the ecc ; thirdly, we illustrate the safety of the ecc and discuss the elliptic curve key agreement scheme, elliptic curve encryption scheme and elliptic curve digital signature algorithm ; fourthly, we study fast algorithms of the multiplication and inversion multiplication of the element of in the underlying finite field f2m whose characteristic is two represented by the two basis of optimal normal basis and polynomial basis. we make improvements to the fast algorithm of the polynomial basis multiplication by hankerson and base on the experiments, we describe the properties and compare the advantages of the multiplication and inversion multiplication of the elements in f2m field under optimal normal bases and polynomial basis. results concluding from the study car be used as references in the realization of the elliptic curve cryptosystem ; fifthly, we overview the current fast algorithm of point multiplication, improve the fix base point comb algorithm, advance the speed of the whole system and remark the advantages and disadvantages of the popular algorithms based upon the experimental datas ; sixthly we realize the algorithm library of elliptic curve cryptography based on the f2m. only change slightly in our algorithm library can we realize the ecdh, eces, ecdsa based onf2m of anysize ; seventhly, we realize the ecc on two secure elliptic curves, including ecdh, eces, ecdsa
本文首先介紹並分析了橢圓曲線密碼體制的優點及研究現狀；其次研究了橢圓曲線密碼體制的基本理論；第三，分析了橢圓曲線密碼的安全性並介紹了密鑰共享，加密，數字簽名等橢圓曲線密碼體制；第四，深入研究了特徵為2的有限域f _ 2m中的元素在多項式基和最優正規基表示下的乘法運算和乘法逆運算的快速演算法，並對hankerson等人提出的多項式基下的乘法運算的快速演算法作了改進，而且在實驗的基礎上不僅分析研究了f _ 2m域中元素在多項式基和最優正規基表示下的乘法和乘法逆運算的性能，還對這兩種基表示下的f _ 2m域中元素運算效率的優劣作了比較和研究，所得的結論可供在實現橢圓曲線密碼體制時參考；第五，研究了目前流行的計算橢圓曲線標量乘法的快速演算法，同時改進了固定基點梳形法，提高了整個系統的速度，並在實驗的基礎上分析研究了流行演算法的優劣；第六，實現了基於f _ 2m的橢圓曲線密碼體制的演算法庫，在我們的演算法庫中只需稍微改變便能實現基於任意尺寸的f _ 2m上的ecdh ， eces ， ecdsa等橢圓曲線密碼體制；第七，實現了兩條安全橢圓曲線上的橢圓曲線密碼體制，包括ecdh ， eces ， ecdsa 。Input the first 6 numbers of the group representatives hkid or passport number in the field below excluding the letter and the number in the brackets, for example, 123456 should be keyed in if the hkid number is a123456 ; 3
請代表于以下位置，輸入身份證或護照號碼首6個位數字不包括英文字母及括號內號碼，例如身份證號碼為a123456 7 ，則應輸入123456The main content is design of digital man - machine interface system, a speed regulating system of good stabilization and dynamic performance ; software for appraising the performance of wire feeder. the first, a digital man - machine interface system using at89s8252 singlechip is designed. the system uses sd7218a keyboard / display chip with serial bus interface
首先，人機交互系統選用at89s8252為核心控制晶元，選用具有串列總線介面的sd7218a鍵盤/顯示晶元完成了數字化人機交互系統軟、硬體設計;採用rs - 485總線實現主控系統和人機交互系統的數據交互;系統採用數字編碼器和鍵盤配合的方式實現焊接參數的選擇和設定，同時還具有最優參數存儲、調用等功能。Each pair of stamp sheetlet and banknote is printed with the same prefix and serial number ( i. e. the starting serial number for tourism series no. 1 is 1, for tourism series no. 2 is 2 and so on ), which is of high collection value
六張鈔票的字頭和號碼分別與郵票小型張上的編號相同，並配成一對（說明：旅遊系列第一號的號碼是以『 1 』開首，旅遊系列第二號的號碼以『 2 』開首，如此類推） ，極具珍藏價值。Firstly, based on conventional vq, a fast algorithm named equal - sum block - extending nearest neighbor search ( ebnns ) is presented, which not only can achieve the reconstructed image of full search algorithm but also can greatly reduce both the codeword search ratio and chip area. in order to improve coding efficiency, a new algorithm called correlation - inheritance coding is proposed, which is embedded in conventional vq system to improve compression ratio by re - encoding the indexes
首先，在普通矢量量化基礎上提出了等和值塊擴展最近鄰快速碼字搜索演算法（ ebnns ） ，該演算法在圖像畫質達到窮盡搜索演算法的前提下，大大降低了碼字搜索率和硬體實現面積；為了提高編碼效率，在相關性編碼方面，提出了相關繼承編碼演算法，對普通矢量量化后的編碼索引進行無損重編碼。First, it introduces the corresponding knowledge, technical roadmap of trunking system, and digital trunking system signaling. second, it presents the encoding, decoding, modulation, demodulation parts and several signaling functions of mdc1200 signaling system. in addition, it analyzes some signaling data packet formats
本文首先對集群通信的相關知識、發展趨勢以及集群通信數字信令進行了介紹，接著對mdc1200信令的編碼、解碼過程，調制、解調方式以及各種信令功能的信令數據格式進行了詳細地分析。This master ’ s degree thesis firstly introduces and discusses the principle of ofdm and the merged blue print for digital terrestrial television broadcasting in china, then proposes a scheme for the test platform of narrowband ldpc decoding efficiency based on fpga. this scheme includes techniques such as time - domain synchronization using pn and power estimation using pilots
本論文首先介紹並討論了數字電視傳輸標準tds - ofdm的實現原理，對其中的一些關鍵問題做了詳細的分析，在此基礎上提出了一種基於fpga的窄帶ldpc解碼-誤碼測試平臺設計方案，即利用時域pn頭同步及頻域導頻進行功率估計的fpga設計。And pays emphasis on analyzing the system structure and system flow, the core techniques, the channel characteristic and parameters of dvb - t system. the system adopts some core techniques such as cofdm, a lot of tps ( transmission parameter signalling ) insert and guard interval, and so on. so it can withstand high - level ( up to odb ), long delay static and dynamic multipath distortion
論文首先描述了數字電視地面廣播的需求條件，技術難點和目前存在的問題，並重點分析了dvb - t系統結構流程，核心技術及系統通道特性和參數，該系統採用了cofdm （編碼正交頻分多路復用） ，大量導頻信號插入和保護間隔技術等核心技術，使之能抵抗高電平（ 0db ） ，長延時的靜態和動態多徑失真，有利於數字和模擬電視的混合傳輸，它的多載波調制模式功能和性能在移動和便攜接收、同頻網等方面具有獨特的優勢。Dvn s set top box ( stb ) is well recognized in china for its quality and extensive usage. a nationwide survey report conducted by the academy of broadcasting science, sarft of china in 2002 ranked it the most widely adopted stb by tv operators in the country. in 2004, dvn received the " best set top box " award in the first digital tv public survey, as well as a " top quality brand " honour in the stb category in the first china consumer products quality survey
根據中國廣播科學研究院二零零二年的《有線數字電視機頂盒技術經濟分析研究報告》 ，天地數碼的柏視通機頂盒為各地運營商選用率最高的終端產品品牌；產品於二零零四年在首屆《數字電視公眾評選》中榮獲最佳機項盒，並於首屆《中國市場產品質量滿意度調查》中榮獲機項盒市場的品質信譽第一品牌。Dvn s stb is well recognized in china for its quality and extensive usage. a nationwide survey report conducted by the academy of broadcasting science, sarft of china in 2002 ranked it the most widely adopted stb by tv operators in the country. in 2004, dvn received the " best set top box " award in the first digital tv public survey, as well as a " top quality brand " honour in the stb category in the first china consumer products quality survey
根據中國廣播科學研究院二零零二年的《有線數字電視機頂盒技術經濟分析研究報告》 ，天地數碼的柏視通機頂盒為各地運營商選用率最高的終端產品品牌；產品於二零零四年在首屆《數字電視公眾評選》中榮獲最佳機項盒，並於首屆《中國市場產品質量滿意度調查》中榮獲機項盒市場的品質信譽第一品牌。In the fec part, rs ( reed - solomon ) code and interleave are chosen as the basic elements of the error correction system at first ; then the coding parameter and data structure are determined based on the results of matlab simulation ; at last, hdl modules are implemented in fpga using verilog hdl, test results and simulation diagrams are presented as well. in the designing process, the proper division of the modules and the cooperation between modules need a lot of consideration, and the top - down method is adopted to solve these questions
在前向糾錯的設計部分，文章首先根據系統的誤比特率要求選擇了rs （ reed - solomon ）碼和交織器作為前向糾錯部分的基本構架，再根據matlab的模擬結果得到了具體的編解碼參數和碼字結構，最後在fpga中用硬體描述語言veriloghdl實現了各個編解碼模塊，並給出了測試數據、實現結果及時序模擬波形圖。First, the thesis introduces the correlation properties of complete complementary codes and compares with other traditional sequences. then the code generation principle is described, together with the software implementation
論文首先介紹了完全互補碼的相關特性及與其它擴頻序列的比較，闡述了完全互補碼的產生原理，並完成了碼字生成軟體。The algebraic decoding algorithms are researched, and such as the common algorithm for the codes whose error correction ability is low, and the iterative algorithm for those whose error correction ability is great. programs are implemented for ( 27, 9 ) rs and ( 54, 18 ) rs
首先本文討論了rs碼的代數譯碼演算法，包括糾錯能力比較小的一般譯碼演算法和適用於糾錯能力強的迭代譯碼演算法，並針對兩種特定碼字rs （ 27 ， 9 ）和rs （ 54 ， 18 ）進行了具體編程實現。分享友人