橢圓度比 的英文怎麼說
中文拼音 [tuǒyuándùbǐ]
橢圓度比
英文
ellipticity ratio-
The various colours significant of various degrees of vitality white, yellow, crimson, vermilion, cinnabar : their degrees of brilliancy : their magnitudes revealed up to and including the 7th : their positions : the waggoner s star : walsingham way : the chariot of david : the annular cinctures of saturn : the condensation of spiral nebulae into suns : the interdependent gyrations of double suns : the independent synchronous discoveries of galileo, simon marius, piazzi, le verrier, herschel, galle : the systematisations attempted by bode and kepler of cubes of distances and squares of times of revolution : the almost infinite compressibility of hirsute comets and their vast elliptical egressive and reentrant orbits from perihelion to aphelion : the sidereal origin of meteoric stones : the libyan floods on mars about the period of the birth of the younger astroscopist : the annual recurrence of meteoric showers about the period of the feast of s. lawrence martyr, 10 august : the monthly recurrence known as the new moon with the old moon in her arms : the posited influence of celestial on human bodies : the appearance of a star 1st magnitude of exceeding brilliancy dominating by night and day a new luminous sun generated by the collision and amalgamation in incandescence of two nonluminous exsuns about the period of the birth of william shakespeare over delta in the recumbent neversetting constellation of cassiopeia and of a star 2nd magnitude of similar origin but lesser brilliancy which had appeared in and disappeared from the constellation of the corona septentrionalis about the period of the birth of leopold bloom and of other stars of presumably similar origin which had effectively or presumably appeared in and disappeared from the constellation of andromeda about the period of the birth of stephen dedalus, and in and from the constellation of auriga some years after the birth and death of rudolph bloom, junior, and in and from other constellations some years before or after the birth or death of other persons : the attendant phenomena of eclipses, solar and lunar, from immersion to emersion, abatement of wind, transit of shadow, taciturnity of winged creatures, emergence of nocturnal or crepuscular animals, persistence of infernal light, obscurity of terrestrial waters, pallor of human beings
顯示出不同程度之生命力的繽紛色彩白淺黃深紅朱紅銀朱諸星之亮度一直包括到七等星以等級標志的諸星之大小諸星的位置御夫座沃爾辛厄姆路172大衛的戰車173土星光環螺旋星雲凝固后形成有衛星的恆星群兩重大陽相互依存的旋轉運動伽利略西蒙馬里烏斯174皮亞175勒威耶赫歇耳加勒176等人各自獨立地同時所做的發現波得和開普勒所嘗試的距離的立方與回轉次數的平方的體系化177多毛的眾彗星178那幾殆無限的被壓縮性,以及自近日點至遠日點那廣漠的遠心的重返大氣層的橢圓軌道隕石的恆星之起源年紀較輕的天體觀測者誕生的那個時期火星上所出現的「暗波」現象179每年在聖勞倫斯節殉教者,八月十日前後降落的隕石雨每月都發生的所謂「新月抱舊月」現象180關于天體對人體的影響的假定威廉莎士比亞出生的時期,在斜倚卻永不沒落的仙后座那三角形上端,一顆不分晝夜散發著極亮光彩的星辰一等星出現了181這是兩個無光死滅了的太陽因相撞並汞合為白熱體而形成的燦爛的新太陽大約在利奧波德布盧姆出生時,出現在七星花冠星座里而後又消失了的一顆同一起源亮度卻稍遜的星宿二等星182還有約於斯蒂芬迪達勒斯出生時,出現在仙女座中之後又消失,小魯道爾夫布盧姆出生與夭折數年後出現于御夫座后又消失,以及另外一些人出生或去世前前後後出現在許許多多其他星座中而又消失了的假定是同一起源的實際存在或假定存在的星斗183 。They not only inherit the advantages of bezier curves and b - spline curves, also can be used to represent straight lines precisely and some remarkable transcendental curves precisely, such as circular arc, ellipse, cardioids and twisted pair line etc. especially, the uniform t - b - spline curve of three degrees is smoother than b - spline curve and c - b - spline curve of the same order
此外由於它們還具有三角函數的優點,故既可以精確表示直線段、二次多項式曲線段又可以精確表示圓弧、橢圓弧等二次曲線以及心臟線、雙紐線等超越曲線。特別地, 3次均勻t - b樣條曲線曲面比同階均勻b樣條( c - b樣條)曲線曲面具有更高的光滑度。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 。In this paper, the drive theory of the large ratio friction transmission is studied ; a new type elliptical cam wave generator is designed ; the large ratio friction transmission prototype is designed and manufactured ; based on the ansys finite element method software, structure of the elliptical cam is analyzed ; precision index of the manufactured large ratio friction transmission prototype, such as transmission accuracy, least step, stability of the least step, load capacity is measured by the absolute rotary encoder. by analyzing the measurement data and research content, it is think that the new elliptical cam wave generator could overcome a good many problems brought by processing errors, facilitate size precision adjustments, input moment can be achieved in the form of a pure force couple importing ; through this study, " the large ratio friction transmission prototype " could apply in practical engineering basically
本文研究了大速比摩擦傳動的傳動理論;設計了新型橢圓凸輪波發生器,設計製作了大速比摩擦傳動樣機;用軟體ansys對所設計的橢圓凸輪結構進行了有限元分析;用19位絕對式編碼器測試了大速比摩擦傳動機構的傳動精度、最小步距、最小步距的穩定性以及帶負載能力等各項精度指標;對測量數據和研究內容進行了歸納和整理,認為新型橢圓凸輪波發生器克服了加工誤差帶來的諸多問題,新型橢圓凸輪波發生器可以進行尺寸精度調整,能夠達到輸入力矩以純力偶的形式輸入;通過本項研究,基本可以使「大速比摩擦傳動機構」在工程中得以應用。Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上,以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型,通過攝動方法和有限體積法,首次對各種截面(圓截面、橢圓截面、環形截面、矩形截面)旋轉曲線管道內充分發展流動的流動結構和傳熱特性(包括耦合對流傳熱特性)以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析,詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響,獲得了若干創新性成果。Finally, we propose the third mirror scheme to reflect atomic by using a blue - detuned semi - flattened - gaussian beam ( sfgb )
顯然,採用半束蘭失諧橢圓高斯光束作為原子反射鏡,在相同的反射鏡面積下,可比sgb反射鏡反射更高法向速度的入射原子束。The results indicated that ( 1 ) " longxianhuosuan " presented more regular and more densely - arranged epidermal cells in its scapes than " gailiangsuan " ; ( 2 ) " longxianhuosuan " showed a lower stomata number but a larger stomatal aperture in its scape surface than " gailiangsuan " ; its scapes had a great number of secretory cells, which had a larger size and appeared earlier ; its scapes presented a smaller number of vascular bundles with smaller diameters ( 3 ) " longxianhuosuan " had polygonal cells in its scape pith with their intercellular space occupying a small proportion while " gailiangsuan " showed elliptical cells in its scape pith with their intercellular space occupying a high proportion
結果表明: ( 1 ) 「隴縣火蒜」比「改良蒜」蒜薹的表皮細胞形狀規則,排列緻密;角質層較薄; ( 2 ) 「隴縣火蒜」比「改良蒜」蒜薹表面的氣孔數量少,但開張度大;分泌細胞出現早、體積大、數量多;維管束數量少、直徑小; ( 3 ) 「隴縣火蒜」蒜薹髓細胞衛多邊形,髓細胞間隙率小,而「改良蒜」蒜薹的髓細胞呈橢圓形,髓細胞間隙率大。We select a common feature in the image - edge of the object as our research content and from this point we spread our work including the contrast enhancing technologies, using mathematical morphology to restrain noises in image, extracting of the geometric primitives, dwt in edge detection and the border thinning and tracing technologies
我們重點針對圖像物體的最直觀特徵?邊緣進行研究,以此為出發點,研究了包括水下圖像對比度增強,利用同態學進行水下圖像噪聲去除,直線和橢圓基元的提取,利用小波變換進行邊緣提取以及基於多邊形近似原則的邊緣追蹤技術在內的各種演算法。Study proves that the accuracy of the underground control measures is much more important than the accuracy of the surface control network, and the basic principle applies to the vertical breakthrough
通過計算它們的相關誤差橢圓確定貫通點的貫通誤差結果證明,地下控制網的精度比地面控制網的精度更為重要。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。For example, digital signature, identity distinguish are both the new technology and application derived from the cryptography. ecc is the one of the known public crypto methods that provide the best strength - per - bit. with the deeper application of ic card in the field of finance and telecom, the ecc crypto system will not only upgrade the application level of ic card, but also open up more application fields
橢圓曲線密碼體制( ellipticcurvecryptosystem ? ecc )是目前已知的所有公鑰密碼體制中能夠提供最高比特強度( strength - per - bit )的一種公鑰加密體制,而智能卡已廣泛用於金融、電信等領域,利用橢圓曲線密碼體制不僅將大大提高智能卡的應用水平而且還將大大拓寬智能卡的應用領域。A static and a transient analysis of an embedded crack in a long elastic strip are carried out. the results are approximate to the ones that existed. and the effects of the factors including the crack configuration, the crack depth, the strip length and the strip thickness on the transient response are discussed
對含內埋橢圓裂紋的板條進行了靜態和瞬態分析,得到的結果與已有的解吻合良好,對影響瞬態響應的因素如裂紋形狀、裂紋深度、板條長度、板條厚度做了分析比較。In the fourth chapter, a fourth - order chebyshev low - pass filter employs new low voltage, highly linear, wide inputting range transconductor is proposed, then we presents a new circuit to tune gm value of transconductor accurately, which employs a new switched - capacitor circuit to change the bias current of transconductor, a third order elliptical function low - pass filter with accurate tunable frequency has been designed using transconductor that is not only with voltage common - mode negative feedback, but also with varying bias - triode transistors which can improve the linearity of this circuit
第四章:提出了一種新的低電壓、高線性度、寬輸入范圍跨導,並由此設計實現了四階切比雪夫( chebyshev )低通濾波器,接著提出了一種寬輸入范圍且具有電壓共模負反饋的全差分跨導,並採用一種新的開關電容電路實現跨導值gm精確可調,從而可以設計得到高性能具有精確截止頻率的跨導-電容三階橢圓函數濾波器。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。This is a contradiction to save a gradually longer key in a limit room. we proposed a solution to combine the elliptic curve cryptosystem and digital - image - hiding, the advantage of ecc ’ s shorter key at the same security level will solve the problem in some extent, at the same time make the transfer of document secure and also cryptic
通過對現有商務文檔安全傳輸策略的研究和對比后,本文提出將橢圓曲線密碼體制與圖像隱藏結合,利用ecc在相同安全強度下密鑰長度短的特點在一定程度上解決這一矛盾,同時達到安全性和隱蔽性的結合,能在一定程度上解決第三方的攻擊。According to fiberglass - reinforced composite material, the propagation modes of lamb wave before and after damage ' s generation is analyzed. ellipse technique is applied to determine damage location. three time delay estimation methods are compared
針對復合材料板,分析了lamb波在結構損傷前後的傳播速度;採用了橢圓技術來確定損傷位置;比較了三種不同的時延估計方法的損傷定位效果。Elliptic curve cryptography ( ecc ) was proposed independently in 1985 by victor miller and neal koblitz. it is a cryptography with the highest security intensity of each bit up until now
橢圓曲線密碼體制( ecc )最早是在1985年分別由v . s . miller和nealkoblitz獨立提出的,它是迄今為止每比特具有最高安全強度的密碼體制。The highest safety strength of private key per bit in the public - key cryptography systems is the elliptic curve cryptography at present. under similar secure conditions, the ecc has the advantages such as : less computation amounts, shorter length of private key, smaller storing and bandwidth. moreover, it has been declared as standard documents adopted by many international standard institutions and regarded as the most universally used public key system
橢圓曲線密碼體制是目前公鑰體制中每比特密鑰安全強度最高的一種密碼體制,在相同安全強度條件下,橢圓曲線密碼體制具有較短的密鑰長度,較少的計算量、存儲量、帶寬等優點,而且橢圓曲線密碼體制已經被許多國際標準化機構作為標準化文件向全球頒布,被認為是下一代最通用的公鑰密碼系統。In this study, the effect of rotating elliptical inner cylinder on the instability of flow field, the relationship between azimuthal wave speed and the angular speed of inner cylinder, and the so - called ' hysteresis ' will also be investigated experimentally
本文主要目的除了藉由實驗比較橢圓與圓形截面內柱兩種系統加速過程中不穩定發生時機、流場流況的差異外;對于所謂的遲滯現象于兩系統中的發生過程亦將探討,此外內柱幾何形狀所造成高階不穩定於圓周方向的波形相速度變化,也是本文的探討重點。The implementation result indicates that the elliptic curves with 192 bit we choosen have stronger security intensity and faster speed than rsa with 1024 bit
實現結果表明,我們選取的192bit橢圓曲線具有比1024bitrsa演算法更高的安全強度和更快的運算速度。分享友人