數字比率表 的英文怎麼說

中文拼音 [shǔzìbǐlǜbiǎo]
數字比率表 英文
digital ratiometer
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 字 : Ⅰ名詞1 （文字） character; word 2 （字音） pronunciation 3 （字體） form of a written or printed ...
  • 比 : Ⅰ動詞1 （比較; 較量高下、 長短、距離、好壞等） compare; compete; contrast; match; emulate 2 （比...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 表 : Ⅰ名詞1 （外面;外表） outside; surface; external 2 （中表親戚） the relationship between the child...
  • 數字 : 1. （表示數目的文字; 表示數目的符號） figure; digit; numeral; character; numeric character 2. （數量） quantity; amount
  • 比率 : ratio; proportion; rate比率計 ratio meter
  1. Finally, with the optimized chaos sequences, the results of software simulation on vhf - rc indicates that ds - ss outbalances the bpsk system without spread spectrum due to ber and the ds - ss with kent sequence is better than the one with golden sequence in some extend

    最後本文對數字混沌序列進行了優選，在超短波中繼通道模型上的模擬結果表明混沌直擴通信相比于非擴頻的bpsk通信在誤碼率方面明顯較低；相對于線性擴頻碼（ gold序列） ，同樣誤碼率較低。
  2. 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 。
  3. In the last, test and optimization of dvb - c modulator system are addressed. methods of test and some items which should be paid attention of digital carrier level and rate of carrier to noise 、 relationship between ber and c / n 、 mer ( modulator error rate ) are given, some test results got by analyzer are all up to dvb - c test standard

    給出了數字載波電平與載噪比（ c / n ） 、誤碼率（ ber ）與載噪比（ c / n ）關系、調制誤碼率（ mer ）測試的方法與測試注意事項，通過分析儀等分析得到結果包括列表和圖示，達到了dvb - c規定的各項指標。
  4. The result of a great deal of experiment shows that the digital control method proposed in this paper is better than the analog one widely used at present. the stability of optical output power and spectrum including temperature stability and long time stability is advanced in great degree

    經過大量的實驗表明：與傳統的模擬控制方法相比，本文設計的數字控制方法能夠顯著的提高sld光源的出纖光功率和光譜的穩定性（包括溫度穩定性和時間穩定性） 。
  5. Based on the analysis, we bring up a new way of thinking, after considering the characteristics of the dds design in software radio system platform. we adopt the rom compression technique of dds special chip and other optimizing methods in the design. we still bring up a new modified method, of which the compression ratio is 139. 6 : 1

    在此理論分析基礎上，針對在軟體無線電平臺中的直接數字頻率合成設計特點，對dds專用晶元進行分析后提出新思路，將dds專用晶元中所使用的幅度表壓縮技術用於軟體無線電平臺中的dds設計，同時採用其它輔助方法進行了優化設計，並提出一種新的改進方法，將壓縮比提高到139 . 6 ： 1 ，很好的改進了軟體無線電平臺中直接數字頻率合成的雜散抑制性能。
  6. Through testing on the running efficiency of the software, and comparing it to the world famous software pgp we get the result that this software has obvious advantage in encryption, decryption, digital signature and signature verification

    通過對本軟體的運行效率進行測試，與國際上流行的pgp軟體比較，數據表明本軟體在加密、脫密、數字簽名、簽名驗證等方面的性能均優于pgp 。
  7. We made an improvement in overcoming the defects in speech signal adaptive delta modulation ( abbr. adm ), such as slope overloading and grain noise. in this method, numerical sliding average filtering was used for filtering decoding speech signal. experiments and analyses indicate that the method makes waveforms in good agreement between the decoding of adm and the original pulse coding modulation ( abbr. pcm ) signal, and considerably improves, the playback speech quality in naturalness, legibility and under standability

    針對語音信號自適應增量調制（ adm ）方式中斜率過載和顆粒噪聲缺點，提出了一種改進方法，它利用滑動平均方法對解碼后的信號進行數字濾波.試驗和分析表明，該方法使解碼后的信號波形與原脈沖編碼調制（ pcm ）波形具有很好的一致性，使再生語音質量在自然度、清晰度和可懂度方面比改進前均有較大提高
  8. Essential requirements for terminal equipment intended for connection to unstructured digital leased circuits of the public telecommunications network using a ccitt recommendation g. 703 interface at a rate of 2048 kbit s with a 75 unbalanced presentation

    使用ccitt g . 703推薦標準規定的介面在75歐姆不對稱表示的2048 k比特每秒掃描率與公共通信網非結構數字出租電路終端設備相連接的基本要求
  9. Essential requirements for terminal equipment intended for connection to unstructured digital leased circuits of the public telecommunications network using a ccitt recommendation g. 703 interface at a rate of 34368 kbit s with a 75 unbalanced presentation

    使用ccitt g . 703推薦標準規定的介面在75歐姆不對稱表示的34368 k比特秒掃描率與公共通信網非結構數字出租電路終端設備相連接的基本要求
  10. Figures from the bank of mozambique show that the value of the metical against the us dollar has fallen from 26 500 at the beginning of november to 29 000 on november 17 despite having recovered since then

    莫三比克銀行的數字表明，梅蒂爾卡兌美元的匯率已經從11月初的26500降到11月17日的29000 . 11月17日後逐漸恢復。
  11. Fs henry tang registered the sharpest rises, as his support rating surged 4. 8 marks after the budget speech, while his support rate climbed 11 percentage points, both figures being his record high

    當中以財政司司長唐英年的升勢最凌厲，支持度比發表預算案前急升4 . 8分，支持率則急升11個百分比，兩者都是唐英年民望數字的歷史高點。
  12. Scanned document image becomes a main fundamental representation of information in office documents and digital libraries etc. in this paper, author presents a document image processing scheme, and mainly studies several key techniques in implementation

    掃描文檔圖像已經成為電子政務中辦公文檔、數字圖書館中圖書資料等媒體信息的主要表現形式，如何對其進行高比率壓縮已成一個迫切需要研究的問題。
  13. " in 2005, the cadaveric organ from deceased person donation rate in hong kong was 4. 2 per million population which lags behind other developed countries. the corresponding figures were 10. 7 in the united kingdom, 21. 4 in the united states of america and 35. 1 in spain, " she said

    她表示：在2005年，香港的遺體器官捐贈比率為每一百萬人有4 . 2宗，遠比其他已發展國家為低，英國的相關數字為10 . 7美國為21 . 4及西班牙為35 . 1 。
  14. In section 4. 2 we analyze its main idea and algorithm in detail, two relevant theorems included ; section 4. 3 provides plenty instances so to explain its nonlinear dimension reduction ability, section 4. 4 propose a combined method that integrates the advantage of various methods. in section 4. 5 we analyze some significant problems in lle, including the locality of manifold representation, the choice of the neighborhood, the intrinsic dimension estimation and the parametric representation of mapping. in section 4. 6 we design an algorithm for estimating the intrinsic dimension in the base of locally linear approximation and discuss the choice of its parameters

    第四章是本文的重點內容，研究一種全新的非線性降維方法? ?局部線性嵌入方法，對它的思想和演算法進行了詳細的分析，給出演算法兩個相關定理的證明；第三節對比主成分分析，通過實例說明局部線性嵌入方法的非線性降維特徵；第四節在此基礎上提出了旨在結合兩者優勢的組合降維方法；第五節提出了局部線性嵌入方法中存在的若干關鍵性問題，包括流形的局部性、鄰點的選擇、本徵維數的估計和降維映射的表示，第六節基於局部線性近似的思想提出了一種本徵維數的估計方法，設計了實用演算法，結合實例對演算法中參數的選取進行了討論；最後一節提出了一種基於局部線性重構的圖形分類和識別方法，將其應用於手寫體數字的圖像分類識別實驗，實驗得到的分類準確率達96 . 67 。
  15. For the 32 phase states, within the frequency band of 60mhz 10mhz, the insertion loss of the phase shifter is lower than 2. 3db, the imbalance of scope is lower than 0. 3db, the phase error is better than 3. 3 degree, the input / output vswr is lower than 1. 7. physical dimension is 40mmx30mmx20mm

    實測結果表明:中頻寬帶五位數字移相器在60mhz 10mhz頻率范圍內， 32個相位狀態的插入損耗都低於2 . 3db ，幅度不平衡小於0 . 3db ，相位誤差小於3 . 3度，輸入和輸出電壓駐波比都小於1 . 7 。
  16. With this method, the compressed bit - streams, which are encoded by dct - based encoding algorithm, can be processed directly to locate the character - regions in the images, just a very small amount of decoding is required so, the amount of data which want to process is smaller, the processing speed is faster and the demand of computer memory is less

    文獻中將此模型用在以dct為編碼基礎壓縮數據上，效果較好。本文將其演算法中的能量定義利用塊間的信息重新定義，並且採用自適應動態閾值對原演算法進行改進。對比實驗結果表明，改進的方法對圖像字元定位比原方法準確率更高，漏檢情況有一定程度的降低，取得了較好的效果。
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