次橢圓性 的英文怎麼說

中文拼音 [cìtuǒyuánxìng]
次橢圓性 英文
hypoellipticity
  • 次 : Ⅰ名詞1 （次序; 等第） order; sequence 2 [書面語] （出外遠行時停留的處所） stopping place on a jou...
  • 橢 : Ⅰ形容詞（卵形） oval-shapedⅡ名詞[書面語] （長圓形的容器） elliptic vessel
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 橢圓 : [數學] oval; oval shaped; ellipse; ellipsoid橢圓規 ellipsograph; [圖] elliptic trammel; 橢圓軌道 ...
  1. For a class of quadratic finite element diseretization systems of an elliptic boundary problem with jump coefficients under the unstructured quadrilateral grids, we are concerned with two kinds of quadratic lagrangian finite element equations, by analyzing the relationship between the linear finite element and quadratic finite element basis functions, a hew amg method is designed

    摘要針對一類帶間斷系數的橢圓邊值問題，在非結構四邊形剖分下，討論了兩種二次拉格朗日有限元方程的代數多重網格法，通過利用雙線性元和二次元基函數之間的表示關系，給出了一種新的網格粗化演算法和構造提升運算元的代數途徑。
  2. 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 。
  3. In this paper, the design of a practical sort of high performance biquadrates elliptic active band - pass filters is emphasized, and then the design techniques and how to calculate the resistors and capacitances, how to make computer simulation and tolerance analysis with computer are described in detail

    摘要本文我們重點介紹了一種實用的雙二次型高性能橢圓函數有源帶通濾波器的設計方法，詳細介紹了該濾波器的設計步驟及阻容元件的參數計算，並對設計出的電路用計算機進行模擬模擬和容差分析。
  4. With the concavity and integrability of sublinear terms near zero, the symmetry results for a class of sublinear elliptic equations are given by making use of the moving - plane method

    本文利用次線性項在零點附近的凹性和可積性，用移動平面法給出了一類次線性橢圓方程正解的對稱性
  5. Then, the chaser ' s two orbit roots are selected as variable and visualizing the simulation by contour plot. this part of research draws the conclusion the same as the first part when the target ' s orbit is circular orbit, while the selected two variable can be wildly changed if the target ' s orbit is elliptical orbit. next, wait time before orbit maneuver is simulated

    其次，利用可視化的等值線圖研究了追蹤器軌道兩個參數為變量的情況下大范圍軌道機動問題，分析表明對圓軌道目標器交會機動時，追蹤器軌道根數不宜與目標器軌道根數相差過大，而對橢圓軌道目標器交會機動時，追蹤器軌道根數可選范圍較大，機動策略和方法富於彈性。
  6. The rare saturday morning meeting in the oval office was originally planned as a courtesy call, a chance for president musharraf to congratulate president bush on his re - election

    星期六早上在橢圓形辦公室進行的罕見的會晤原本只是一次禮節性拜訪，讓穆沙拉夫有機會恭喜布希總統獲得連任。
  7. 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 。
  8. The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks, detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack, a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading. the distributions of tz are minutely studied in the forward section of the cracks. strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions

    全文主要研究內容和學術貢獻如下: 1 .針對一般三維裂紋端部場應力約束準確解析的困難，對均勻拉伸載荷作用下各向同性彈性板中穿透厚度中心直裂紋、半橢圓表面裂紋和1 / 4橢圓角裂紋進行了大量詳細的全場應力三維有限元分析，首次全面分析了非穿透裂紋端部場三維影響區范圍，給出了不同形狀三維裂紋前沿離面應力約束因子tz的數值解，並結合k場平面解給出了非穿透裂紋端部應力場k - tz雙參數描述。
  9. The primary advantage that elliptic curve systems have over systems based on the multiplicative group of a finite field ( and also over systems based on the intractability of integer factorization ) is the absence of a subexponential - time algorithm ( such as those of index calculus type ) that could find discrete logs in these groups

    與基於有限域的乘法群系統（及基於整數分解的難解性之上的系統）相比，橢圓曲線系統的優勢在於，迄今為止還沒找到這類群上離散對數的次指數時間演算法（如微積分類）
  10. 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。
  11. In chapter 6, we study existence of the weak solutions for a class of the nonlinear dirichlet problems on h " and estimates of the eigenvalues about the subelliptic operators on heisenberg group

    最後，我們在heisenberg群上研究幾類半線性次橢圓方程的弱解存在性問題和幾類次橢圓運算元的特徵估計問題。
  12. In this thesis, the basic problem of network security, some correlative protocols and cryptology are discussed at first, math theory in point is also studied. especially, a sort of new matrix method of solving quadratic equation over gf ( 2m ) is given, which is the key of selecting random point over elliptic curves. no better solution has been found in related literature in the world. compared with ieee p1363 ' s method, it is easy to implement the software and obtain high efficiency, etc. then the basic operation of elliptic curve is debated and the steps of finding secure curve and basis point over gf ( 2m ) are presented. moreover, the encryption and decryption schemes of the ecc are designed and the security problem of ecc is also considered. in the end, ecc by koblitz curves are implemented

    文章首先討論了網路安全基本問題、網路安全協議和密碼學；對相關數學理論進行了研究，特別是給出了一種新的求解gf （ 2 ~ m ）上二次方程的矩陣法，而它是選取橢圓曲線上的隨機點的關鍵步驟，和ieeep1363的方法相比，它有易於軟體實現、效率高等優點，在國內外相關文獻上還未見到更好的求解方法；接著討論了橢圓曲線的基本運算，進而給出了在gf （ 2 ~ m ）上選取安全曲線及基點的步驟；文章還設計了橢圓曲線加密系統的加解密方案，討論了橢圓曲線系統的安全性問題。最後文章就koblitz曲線加密系統進行了軟體實現。
  13. In this article, we study the implemetation of fpga for elliptic curve digital signature algorithm. based on number thesis 、 abstract algebra and complex thesis ， integrated information theory 、 cryptography and some specific relevant algorithm ， we ascertain the implementation of ecdsa for hardware project ： according to the design idea of hiberarchy and modularization, we adopt very high speed ic hardware description language ( vhdl ) as design input and simulate the design in every level and every model for the correct of the fundamental design. after finish the top design, we perform the whole simulation. then ， we carry out the timing simulation after the logic synthes and layout

    本文從實際應用出發，研究了橢圓曲線數字簽名演算法的fpga的實現：以基本的數論理論、抽象代數和復雜度理論為依據，結合信息論、密碼學的一些知識以及一些具體的相關演算法，確定了ecdsa的硬體實現方案：按照層次化、模塊化的設計思想，採用硬體描述語言vhdl作為設計輸入進行ecdsa的硬體設計；在每個設計層次和每個模塊都進行了模擬驗證，得以保證底層設計的正確性。在確保每個模塊的設計正確后，完成對電路的頂層設計，進行總體的模擬。
  14. The existence of solution for some degenerate elliptic equation with critical exponents

    群上具有臨界指數的次橢圓方程解的存在性
  15. Chapter5 : the recently developed method of hyperbolic tangent function expansion is extended and new function transformation is applied to construct some new solitary solutions of kdv equation and klein - gordon equation and the jacobi elliptic function expansion method, which is advanced in 2001, and the extended method of doubly jacobi function expansion are used to construct the exact solutions of a kind of nonlinear evolution equations

    第五章對近年來發展起來的雙曲正切函數展開法加以改進，採用新的變換函數，得到了kdv方程和非線性klein - gordon方程的一些新的孤立波解。其次，分別採用2001年提出的jacobi橢圓函數展開法和本文由此擴展而來的雙橢圓函數展開法，求解了一大類非線性發展方程，得到了一系列新的周期解。
  16. By using the solutions of a new auxiliary elliptic equation, a direct algebraic method is proposed to construct the exact solutions of some nonlinear evolution equations. the main difference between this method and previous auxiliary elliptic equation methods is that the balance order becomes smaller after using the new auxiliary elliptic equation. therefore, the derived algebraic equations are greatly simplified. meanwhile, the obtained new solutions contain more parameters to be chosen. for some special cases, they give the previous known solutions. it is shown that some new exact periodic solutions of some nonlinear evolution equations are explicitly obtained with the aid of symbolic computation

    利用一個新的輔助橢圓方程將求解非線性發展方程精確解的問題轉化為一個代數方程組進行求解，與已有的輔助橢圓方程法的主要不同是，應用這一新的輔助橢圓方程后降低了平衡次數，減少了所得的代數方程組的個數和方程的項數，從而大大地簡化了代數方程組的求解.同時，由於輔助橢圓方程的解中包含了更多的可選參數，從而給出了非線性發展方程的更多形式的解.作為應用，藉助于計算機的符號計算，求得了一些非線性發展方程的新的精確周期解
  17. Advances in cryptology - asiacrypt 2001, lecture notes in computer science 2248, gold coast, australia, 2001, pp. 351 - 368. 15 huang x, susilo w, mu y. breaking and repairing trapdoor - free group signature schemes from asiacrypt 2004

    分析標明他們的方案一共需要13次橢圓曲線上的pairing運算，由於pairing的運算代價非常大，所以他們的方案失去了原有方案的高效性，並不是一個有效的方案。
  18. Luxury meets fresh and bold style with the motorola pebl colors. stretching the boundaries of traditional design, the colorful pebl boasts a unique oval shape, distinctive vertical external display, innovative one - handed opening hinge design and tactile soft - touch finish

    將華麗感糅合新鮮感與創意，成就了motorola pebl colors ，突破傳統設計至另一層次，彩色pebl將獨特的橢圓造型別具個性的垂直顯示設計一推揭蓋式設計及堅實的觸感，再次重新演繹！
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