logarithm curve 中文意思是什麼
logarithm curve
解釋
對數曲線-
The fourth chapter introduces the theory of fractional brown movement ( fbm ). the image texture of turning workpiece is analyzed using fbm model. after abstracting the texture character, the cutting tool wear status can be determined according to fractal dimension and average slope of the fitting curve of the logarithm power spectrum
第四章採用分數布朗運動（ fbm ）的基本理論，對切削工件表面紋理的圖像進行分析，提取紋理特徵參數，根據分形維數和圖像上對數功率譜的擬合曲線的平均斜率來判斷刀具的磨損狀態。 -
The security of elliptic curve cryptography ( ecc ) depends on the intractability of the elliptic curve analogue of the discrete logarithm problem. ecc has gained increasing popularity in public key cryptography, because of its computation and storage
橢圓曲線密碼是基於橢圓曲線離散對數難題的一種密碼體制，由於它在運算量和安全性方面的優勢，是目前最具有廣泛應用前景的一種公鑰密碼體制，近幾年一直是人們的研究熱點。 -
The probability of being or exceeding a given damage state of buildings by a given ground motion intensity is calculated from the spectral displacement corresponding to the intersecting point of the demand spectrum and the capacity curve, the median value of spectral displacement at which the building reaches the threshold of the damage state and the standard deviation of natural logarithm of spectral displacement of the damage state
文中，討論了非彈性需求譜的推算，將現行抗震設計規范中規定的反應譜換算得到的彈性需求按對應的譜位移折減，得到非彈性需求譜。依對應的譜位移在四個需求譜上的四個點和原點，構造了典型建築物的抗力曲線。 -
The security of elliptic curve cryptogrphy ( ecc ) is based on the difficulty of elliptic curve discrete logarithm
橢圓曲線密碼體制的安全性基於橢圓曲線離散對數問題的難解性。 -
The difficulties of elliptic curve discrete logarithm problem and safety of 3 - des encryption is analyzed in detail. this cryptographic system applies a key exchange scheme based on ecc and trusty data encryption algorithm
文章最後分析了該密碼系統的安全性，對橢圓曲線離散對數問題的難解性以及三重des加密演算法的安全性作了較詳細的分析。 -
Its security is ensured by the difficulty of elliptic curve ' s discrete logarithm problem by means of the exclusion of supersingle and anomalous elliptic curves and the adoption of a big prime ( more than 160 bits ) for the order of base - point in elliptic curve in this scheme of data encryption
加密方案中沒有使用超奇異橢圓曲線及異常橢圓曲線，橢圓曲線上基點的階為大素數（長度160比特） ，保證了橢圓曲線離散對數問題的難解性，從而最終保證了整個方案的安全性。 -
This scheme is based on the elliptic curve discrete logarithm, which is one of the mathematic puzzles. compared with other cipher systems, it has shorter length of secret key and grouping in the same security intensity
該體制是建立在橢圓曲線離散對數問題這一數學難題之上的，和其它密碼體制相比較而言在同等安全強度下具有小得多的秘鑰長度及分組長度。 -
The knapsack public key cryptosystem based on np completeness problem and the elliptic curve cryptography ( ecc ) based on discrete logarithm problem ( dlp ) are two significant ones, which plays an crucial role in the development and research of computer cryptology
基於np完全問題的背包公鑰密碼和基於離散對數問題的橢圓曲線密碼（ ecc ）是兩種著名的公鑰密碼系統，在計算機密碼學的發展和研究中具有十分重要的地位。 -
The application study of non - equal changeable angle logarithm helical curve in drawing shape of twisted blade
非等變角對數螺旋線在扭曲葉片繪型中的應用 -
For the image with random field feature, the description language is probability distribution model, and the description length equals the negative base - two logarithm of the probability of the image data ; for the region homogeneity properties of active contour, the description language is chosen as a sign gradient map, and the description length is the summation of sign gradient inside the active contour ; for the active contour regularity, the description language is smoothness, and the corresponding description length is the length of active contour curve
隨機場圖像的描述語言採用概率分佈模型，描述長度是圍道內外區域中圖像數據概率的以2為底對數的負數；活動圍道區域一致性的描述語言為有符號的梯度圖，描述長度是圍道內區域有符號梯度的總和；圍道形態的描述語言採用平滑性，描述長度正比于圍道的長度。 -
The elliptic curve digital signature algorithm ( ecdsa ) is the elliptic curve analogue of the digital signature algorithm ( dsa ). it was accepted in 1999 as an ansi standard, and was accepted in 2000 as ieee and nist standards. unlike the ordinary discrete logarithm problem and the integer factorization problem, no subexponential - time is known for the elliptic curve discrete logarithm problem. for this reason, the strength - per - key - bit is substantially greater in an algorithm that uses elliptic curves
橢圓曲線數字簽名演算法（ ecdsa ）是數字簽名演算法（ dsa ）的橢圓曲線對等。它先後成為ansi ， ieee ， nist和iso的標準，而且其它的一些組織正在考慮成為其標準。不象普通的離散對數問題和因數分解問題，橢圓曲線離散對數問題沒有已知的亞指數演算法，所以使用橢圓曲線的演算法在密鑰的位強度是足夠高的。 -
The basic principal and general structure of dry gas seal are introduced briefly, and aiming at the characteristics of logarithm spiral curve, the calculation of the pressure to the spiral groove end surface by the theory of narrow groove are given. the method of narrow groove theory and finite element method are utilized to optimize the end surface structure of the spiral groove dry gas seal. the structure of the seal is confirmed on the base of the result
簡要介紹了干氣密封的基本原理和一般結構，同時針對對數螺旋線形的特點，介紹了窄槽理論對螺旋槽端面的壓力分佈計算，利用窄槽理論和有限元方法對螺旋槽干氣密封端面結構進行了優化，並得出了優化結果，根據這一結果，確定了具體的密封結構。 -
This paper has broaden the concept of maximum likehood estimate, put forward a new concept : so called " direction maximum likehood estimate ", and has proved the isosceles hyperbolic curve relationship of parameter, under the condition of normal distribution and logarithm normal distribution
摘要在本文中將極大似然估計的定義進行了推廣，提出了方向極大似然估計的新概念，並在正態分佈、對數正態分佈下證明了兩參數、的等腰雙曲線型關系。 -
Ecc is set up on the basis of solving this mathematics difficult problem of the elliptic curve discrete logarithm problem ( ecdlp )
橢圓曲線密碼體制（ ecc ）建立在解橢圓曲線離散對數問題（ ecdlp ）這一數學難題的基礎上。 -
Research on the security of the elliptic curve discrete logarithm problem, present the conditions of keeping the security of the elliptic curve discrete logarithm problem
對橢圓曲線離散對數問題進行了研究。建立了一種便於實現的，安全的橢圓曲線密碼體制。 -
( 3 ) this thesis applies the elliptic curve cryptography over finite fields to the status authentication systems in the electronic commerce and proposes a new status authentication mechanism based on the discrete logarithm problem in the points on elliptic curves over finite fields. this new status authentication mechanism can provide increased speed and decreased key size for a given level of security
山東師范大學碩士學位論文? ?電子商務系統中的安全機制研究（ 3 ）將有限域上的橢圓曲線密碼演算法（ ecc ）應用於電子商務中的身份認證系統，提出基於有限域上橢圓曲線點群中離散對數問題的身份認證機制，僅用短的密鑰就可以達到rsa dsa演算法很長密鑰的安全強度（目前，大約224bits的ecc就可以達到2048的rsa的強度） 。
分享友人