逆計算 的英文怎麼說

中文拼音 [nìjìsuàn]
逆計算 英文
back substitution
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 算 : Ⅰ動詞1 （計算數目） calculate; reckon; compute; figure 2 （計算進去） include; count 3 （謀劃;計...
  • 計算 : 1 （求得未知數） count; compute; calculate; reckon; enumerate 2 （考慮; 籌劃） consideration; pla...
  1. The property of symmetry can also be used to save a part of the computational effort required for matrix inversion or for a solution of equations.

    對稱的特性也可用來節省矩陣求逆中或求解方程中所需要的一部分計算量。
  2. Computer drawing of some important technological data in countercurrent extraction operation of immiscible systems

    互不溶體系逆流萃取過程中的幾個重要工藝數據的計算機圖解
  3. ( 4 ) on the efficient method for the dynamical core of the new generation multi - scale forecasting model i ) we present a new multi - level sparse approximate inverse preconditnioner for the complicated 3 - d helmholtz equations in the new generation weather forecasting model. as a result, the new sparse approximate inverse preconditioned gcr and gmres algorithms are given and successfully applied in the dynamical core. numerical tests show that the new algorithms perform very efficiently, and can greatly improve the efficiency of numerical model

    對此，本文提出了一種基於逐層門限技術的近似逆矩陣稀疏模式預選方法，並構造了相應的稀疏近似逆預條件子，結合gcr演算法和g州[ r衛s演算法，首次將逐層門限稀疏近似逆預條件子應用於新一代多尺度預報模式動力內核的實際計算，數值實驗表明這里給出的方法可以大大提高數值模式的計算效率。
  4. We established geological and mathematic model for the relief of overthrust fault and earned out simulation computation after selecting factors. the result is that pressure can be released when fault is open. but ft will take a long time for the formation pressure to be relieved to normal formation pressure

    建立了逆掩斷層泄壓的地質模型和數學模型，選取參數后進行了模擬計算，結果表明逆掩斷層活動開啟釋放壓力，但要將地層壓力釋放到正常地層壓力需要時間較長，在斷裂活動時期不足以將圈閉中超壓釋放掉，這是庫車坳陷超壓能夠保存的另一主要原因。
  5. This method doesn ' t compute the moore - penrose inverse of image jacobian

    這種方法無需計算雅可比矩陣偽逆。
  6. Modeling : this thesis develops a method different from traditional techniques that begins with the cylindrical projection of a generic model and its seamless global texture map using multiresolution technique, and then automatically fit the unwrapped cylindrical projected mesh to the texture map with an improved algorithm that based on 2d morphing to specify corresponding feature points ( or lines ). finally, we propose a formula of inverse cylindrical projection to recompose the deformed mesh, and after the texture mapping a photo - realistic individual facial model is created

    採用多解析度技術構造紋理無縫拼接圖，然後把三維網格模型投影到圓柱面上並展開，根據二維圖象變形技術中特徵點匹配演算法的數學思想，將匹配公式進行改進后應用於模型網格點的適配，在作了一定假設后推導出逆向圓柱映射的計算公式，再將適配后的柱面網格映射回去，最後進行紋理映射生成真實感的特定人臉的三維模型。
  7. The best scheme was chosen after analysis and comparing and the structure was designed. at same time, the kinematics analysis was conducted, coordinate transformation matrix using d - h method was set up, and the kinematics equation direct solution and inverse solution was deduced, the velocity jacobian matrix was constructed using vector product method, and the values of displacement and velocity of some special point including the wrist point were calculated. secondly, the working space of the robot was analyzed and the axes section of practical working space was drawn

    首先，作者針對機器人的設計要求提出了多個方案，對其進行分析比較，選擇其中最優的方案進行了結構設計；同時進行了運動學分析，用d - h方法建立了坐標變換矩陣，推算了運動方程的正、逆解；用矢量積法推導了速度雅可比矩陣，並計算了包括腕點在內的一些點的位移和速度；然後藉助坐標變換矩陣進行工作空間分析，作出了實際工作空間的軸剖面。
  8. Therefore, how to ensure the simulation precision and accuracy is crucial to engineering applications. further improve the automated theory, and continually enhance the accuracy of simulated body structure is the focus of research on anti - collision simulation

    基於一步成形逆有限元方法可以對車身結構件的成形厚度和塑性應變進行預示，改進這一方法，並應用於車身結構件碰撞計算模擬中。
  9. In this dissertation, we firstly prove that any dirichlet problem is indeed equal to a voltages problem of networks. we give five solutions to dirichlet problem in two dimensions ; among these five solutions, we prove that the iteration solution and the solution of relaxations are exponential convergence, then we estimate their respective convergence rates ; secondly, we discuss random walks on general networks, prove that there is an one to one correspondence between networks and reversible ergodic markov chains ; thirdly, we give probabilistic interpretation of voltages for general networks : when a unit voltage is applied between a and b, making va = 1 and vb = 0, the voltage vx at any point x represents the probability that a walker starting from x will return to a before reaching b ; furthermore, we study the relationship between effective resistance and escape probability : starting at a, the probability that the walk reaches b before returning to a is the ratio of the effective conductance and the total conductance

    本文證明了任何邊值的dirichlet問題都可轉化為求解電路電壓的問題：給出了計算平面格點上dirichlet問題的5種方法：證明了迭代法和松馳法都是指數收斂的，並分別給出收斂速度的估計；討論了一般電路上的隨機徘徊，驗證了電路與可逆的遍歷markov鏈是一一對應的；給出了電路電壓的概率解釋：當把1伏電壓加於a ， b兩端，使得v _ a = 1 ， v _ b = 0時，則x點的電壓v _ x表示對應的markov鏈中，從x出發，到達b之前到達a的概率；進一步地，給出了逃離概率與有效電阻之間的關系：從a出發，在到達b之前到達a的概率為有效傳導率與通過a的總傳導率之比。
  10. Firstly. operation principle of induction heating is introduced and the actuality of the power supply for induction heating is summarized. then, the scheme of structure of the power supply is established : uncontrolled rectifier and buck chopper constitute dc circuit. in this part, operation principle of a kind of soft switching buck chopper is presented mainly and the conclusion that the power semiconductor devices operate in soft switching is also illustrated by analysing the operation principle of all stages ; series resonant inverter is selected as inverter circuit via comparing the advantage and shortcoming of parallel resonant and series resonant. moreover. the work principle of series resonant inverter is analysed and the calculating method of the best dead time is put forward as well

    文中首先介紹了感應加熱電源的工作原理並綜述了國內外的研究現狀。接下來分析並制定了電源主電路的構成方案：在對比幾種功率調節方式的基礎上選擇了不控整流加斬波調壓作為直流部分。在這部分里，重點研究了一種軟開關buck變換器，通過分析各階段的工作原理說明了開關器件如何工作在軟開關狀態；對于逆變器部分，在比較了串、並聯逆變器優缺點的基礎上選擇了串聯諧振逆變器，並詳細分析了串聯逆變器的工作原理，提出了最佳死區的計算方法。
  11. The rule of loads and settlement is concluded from numbers of settlement observation points ’ data. and in actual construction, this rule could be used to prevent immediate settlement under the accelerated load, and also, the serious result of the soil destruction could be avoided. at last, a proper method of settlement computing is derived from the identified rules, which can be used to guide the practical construction work, of course, meeting the compulsory standards of the settlement control well

    採用逆作法施工，現實地解決了樁、土與筏板接觸面的變形協調關系;通過對樁、土受荷過程的實際測試，得出了樁、土分擔荷載比例和變化過程，從而為樁、土的荷載計算提供實際依據;從設置的大量沉降觀測點中所得到的沉降資料，得出荷載、沉降變化規律，從而指導在實際施工中，防止加載過快而導致速沉，避免由此帶來的土體破壞的嚴重後果;通過沉降規律分析，得出了適用於軟土地區的樁基沉降計算方法，用於指導實際施工，以滿足沉降控制的強制性標準。
  12. The property shows that the maximal solution is well - conditioned. two new iteration methods for finding the maximal solution are proposed. of these two methods, one is a linearly convergent iteration without matrix inversion, and one is related to newton s method and quadratically convergent

    這2種方法，一種是線性收斂的，其優點是迭代過程不需要求矩陣的逆另一種是二次收斂的，數值試驗的結果表明該方法在計算速度和精度方面都明顯地優于現有的其他幾種迭代方法。
  13. The results show that all solution can determinately exist, which avoids the complicated discussion to singular solution educed from d - h transformation method

    結果表明，各關節的運動學逆解唯一，計算簡單，運算量小，特別是對于具有多冗餘度的機器人，此法能夠避免奇異解的討論，提高計算效率。
  14. 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 。
  15. With the experiment part, the errors of sk - 21 nc machine tool have been measured, and a serial of data is gotten which lead to the error discrimination. ( 3 ) based on the kinematical theory of mbs, the calculation methods for the ideal center envelop curve of grinding wheel on cam grinding, the practical cutter track, inverse contour of cam, ideal nc instructions, precision nc instructions, the inner / outer normal and the fitting criterion of curve have been all discussed in detail in this paper

    （ 3 ）通過精密加工的約束條件方程，探討理想刀具路線、逆變數控指令與實際刀具軌跡之間的映射關系，解決誤差補償技術提高加工精度的核心問題? ?當要求數控磨床的砂輪中心準確到達給定的理想點時，精密數控指令值究竟該是多少，如何能夠通過計算，獲得這樣的數控指令值，給出經修正的數控指令計算方法。
  16. This thesis chiefly analyzes the problem of exchanging heat quantity and the methods of the improvement of cooling tower in power station, compares and analyses the advantages and disadvantages of it. this thesis will discuss how to prevent natural - draft counter - flow wet cooling tower from freezing in winter, and compute the areas of draught deflectors

    本文針對自然通風逆流式冷卻塔冬季運行時的防凍處理，及預防結冰所應採取的措施進行研究和計算，提出以增加或減少擋風板的高度來控制出塔水溫的方法，並對其進行計算分析。
  17. This thesis will put forward a new design project that aimed at discussing the packing sets of natural - draft counter - flow dry cooling tower, which is the research and application of the spray nozzle. the content mainly includes the experimental study of the application of the jnx - 01 spray nozzle in cooling tower, as well as the heating calculation

    本文將針對自然通風逆流濕冷式冷卻塔中影響效率較大的淋水裝置提出設計改進方案，即旋轉式噴濺裝置的研究與應用，內容主要包括jnx - 01型節能旋轉式噴濺裝置及旋轉濺水碟式噴頭在冷卻塔上應用情況的試驗研究及熱力計算。
  18. Now the two issues we are confronted with are : first, a reasonable regularization technique is required to overcome the ill - posedness of the problem ; second, we are required to develop a computational efficient technique to reduce the complexity of the solving, which in turn promotes the implementation of the solving algorithm

    目前，逆問題研究中需要解決的關鍵問題是： 1對逆問題中的病態現象，給出一種合理的正則化方法； 2減少逆問題求解所需的計算量，增強求解演算法的可實施性。
  19. This is due to the following two facts : the ill - posedness induced by the incompleteness of the observation data can make the solving much more difficult ; in addition, the observation system involved multiple sensors are required to compensate the inaccuracy of the observation equipment, which will inevitably make the cost of the computation prohibitively expensive

    這是因為，一方面，由觀測數據的不完全性等因素導致的病態現象往往會給逆問題的求解帶來很大困難；另一方面，由於觀測設備自身性能和觀測環境等因素的限制，要獲得更高的估計精度往往需要用多個傳感器對目標進行觀測，這必將給求解逆問題帶來由於計算量過大而難以實現的困難。
  20. The recursive algorithms of restricted, increased, decreased mode are deduced without the calculation of the inversion

    分別導出了rkrls和rsvm演算法在限定、增長和縮減記憶模式下的遞推公式，均無需進行求逆計算。
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