variational 中文意思是什麼

variational 解釋
變化的
  1. Four - dimensional variational assimilation of aws precipitation data

    用四維變分法同化自動站降水資料
  2. Connexion of first integrals with particular solution to the variational equations for birkhoffian systems

    系統的第一積分與其變分方程特解的聯系
  3. Firstly, second harmonic component ratio and dead angles of two phase inrush ' s dispersion in three - phase transformes are acted as input variable. secondly, the method applies improved algorithm based on the original algorithm of multi - layer forward back propagation network, that is to say, adding last variational effect of weight value and bias value to this time and making use of variable learning rate. at the same time, this method also adopts dynamic form in the number of hidden floor node

    首先，文中將三相變壓器兩相涌流差流的二次諧波含量比和間斷角作為網路的輸入變量；其次，利用對原有bp網路訓練演算法基礎上的改進型演算法（即在計算本次權值和閾值的變化時增加上一次權值和閾值變化的影響以及採用變學習率，與此同時隱含層神經元個數採用動態形式） ，通過樣本訓練使網路結構模型達到最優。
  4. All kinds of variational principles are educed under a uniform framework

    在統一的構架下，導出了各種變分原理。
  5. The finite element method does not exhaust the possibilities for variational methods.

    有限單元法不能排除變分法。
  6. Under general geological study of exploratory development of coalbed gas and underground gasification of coal bed in eastern depression of liaohe basin, authors apply the basic principle of coal geology and the data of vitrinite reflectance and technical analysis of coal to ascertain that coal classification are dominantely the lignite, long - flame coal and gas coal of coal - bearing upper section of third member of shahejie formation, and then dissertate the variational regularity between coal rank and buried depth in vertical and otherness of vertical limit of coal rank in different coal - rich regions

    摘要運用煤田地質學基本理論和煤的鏡質組反射率值及工業分析等有關數據，確定了遼河盆地東部凹陷古近系沙三段含煤亞段的煤種主要為褐煤、長焰煤和氣煤；進而闡述了該煤段垂向上煤級與埋深的變化規律性、不同賦煤區各煤級垂向界限的差異性。
  7. First, we reformulate the kkt systems of the constrained optimization problem and the symmetric variational inequality prpoblem into equivalent nonsrnooth equations by using the so called ncp functions

    本文研究求解約束最優化問題和對稱變分不等式kkt系統的bfgs演算法。首先利用ncp函數將問題的kkt系統轉化為等價的非光滑方程組。
  8. Variational analysis of dispersion characteristics in disk - loaded waveguide slow - wave structures

    盤荷波導慢波結構色散特性的變分分析
  9. On the basis of complet ' : ly analyses about dual - m ( ) de phase shiftcrs, the finite - element formulation derives the variational principle for non - se1fadjoint electromagnetic problems which is microwave propagaticn in a aniso1ropic media loaded waveguide. then, the variatonal problem is approximated by a matrix eigenvalue problem

    在此基礎上，詳細討論了利用有限元分析法這一強有力的工具來分析波導中填充各向異性介質的問題，導出了基於變分原理的泛函和有限元方程。
  10. Many scientists and mechanists, such as euler, prager, green, ericksen, hill, truesdell, eringen, made great contribution in this field and developed a general theoretical system. however, there still remain a lot that should be further investigated. this thesis discusses the linear theory of field of elastic solids subjected to additional deformation, and the corresponding virtual work equations and the displacement - based variational principle

    本文第一章述評了由euler開創的，經prager 、 green 、 ericksen 、 hill 、 truesdell和eringen等學者發展並成功應用的附加變形或運動的思想，作為后續各章的基礎。
  11. Secondly meteorologic datum assimilation history and major ways are introduced. especially four - dimensional variational assimilation is emphasized

    接著介紹了氣象資料同化的發展歷史及主要方法，並重點強調了四維變分同化理論。
  12. Based on the generalized variational principle of the modificatory variables and substituent shearing strain field interpolation of the bending theory of the mindilin plate, this paper brings up the nine - node mixed plate bending element and adopts the sap2000 ? a large - scale finite element analysis programs. by the examples, we find the precision of the method is satisfying

    在對轉換層厚板進行局部有限元分析時，本文提出了基於mindlin中厚板彎曲理論的修正的二類變量廣義變分原理和替代剪應變場插值方法的九節點厚薄板通用的板彎曲單元，並採用了sap2000有限元程序。
  13. The variational parameter multiplying each coordinate is called a scale factor.

    每個坐標所乘的變分參數叫定標因子。
  14. Variational analysis on therm - elastical stresses of plane strain problem of thermal barrier coating structure in laser radiate

    激光輻照熱障塗層中平面應變問題的熱彈性變分分析
  15. Problems of unconstrained optimization and variational inequality

    變分不等式問題與無約束最優化問題
  16. Optimal design with three variables is then done to the elbow - bar mechanism of the mp1040b moulding machine by utilizing the method of punishing function for constraint problems and variational scale for unconstraint problems. the optimal target function is the maxium of gradient in one work travel for the moulding plank of the elbow - bar mechanism. the result shows that the maximal gradient of moulding plank in one motion period declines by 25. 7 after optimization, and the angular acceleration of the bottom moulding plank decreases greatly

    動力學分析中，各構件的質量和轉動慣量是通過pro / engineer軟體，先建立各個構件幾何模型而求得；然後，利用解決約束問題的罰函數法和處理無約束問題的變尺度法對mp1040b型模切機肘桿機構進行三個設計變量的優化設計，優化目標函數為肘桿機構的下模切板在一個工作行程中達到的最大傾斜程度；通過優化設計，模切機肘桿機構的下模切板在一個工作行程中的最大傾斜程度降低了25 . 7 ，其角加速度明顯減小，提高了模切機動力學性能。
  17. However, in existing global newton ' s methods a linearized variational inequality subproblem has to be solved at each iteration, whose computational cost is equivalent with a qp problem, and the local fast convergence is usually established theoretically incompletely

    通過應用fiseher一burmeister非線性互補問題函數， h . qi和l . qi在17 ]中對以前的qp一free演算法做了有效的改進，使得迭代矩陣的一致非奇異性得到保證。
  18. Since the variational method is useful for determining characteristic quantities such as resonant frequency and impedance, it is mainly used in this thesis

    變分法在確定諸如諧振頻率和阻抗等特徵量方面非常有效，因而本文主要採用了變分法。
  19. The result shows that the compressive strength of concrete under natural variational low temperatural curing is higher than the compressive strength of concrete under permanent low temperatural curing and the pore porosity under natural variational low temperatural curing is less than the compressive strength of concrete under permanent low temperatural curing ; the compactibility of concrete is good with fa ( < 15 % ) and sf ( < 8 % )

    結果當摻合料摻量相同時，自然變低溫（ - 15 ~ 5 ）養護條件下混凝土抗壓強度高於恆低溫（ - 10 ）養護條件下混凝土抗壓強度，孔隙率要低於恆低溫（ - 10 ）養護條件下混凝土的孔隙率;當單摻粉煤灰時摻量低於15 % 、單摻硅灰時摻量低於8 % ，低溫混凝土的密實性較好。
  20. Results show that the aspects are obviously improved in the requires of functional qualities, computational accuracy, convengence and computational speed of algorithms. by this, the new technique of variational data assimilation maybe has wilder application in practice

    所得結論表明，與傳統的四維變分同化方法相比，本文提出的方法在函數性態要求、計算精度、演算法收斂性和計算速度方面有了明顯改善，使得變分同化技術有可能更廣泛地應用於實際業務。
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