弱微分 的英文怎麼說

中文拼音 [ruòwéifēn]
弱微分 英文
weak derivative
  • 弱 : Ⅰ形容詞1 （氣力小; 勢力差） weak; feeble 2 （年幼） young 3 （差; 不如） inferior 4 （接在分數或...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  1. Analysis on trace elements in serum of amblyopia children

    弱視兒童血清微量元素的檢測分析
  2. We use fuzzy mathematical morphology to remove noise and dust which can lower noise successfully and also make up a loss of intensity caused by fluorescence blench. to acquire the target region, we purpose automatic gridding method based on image segmentation for image with irregular spots, it ' s segmentation through threshold. this method is presented simply and fast

    在網格定位中，本文針對信號點不規則的晶元圖像提出了基於圖像分割的自動定位方法? ?閾值分割，該方法簡單快速，但對于光密度分佈不均勻的信號點，可能會去掉部分微弱信號，降低了計算的準確性。
  3. Firstly, in order to treat the local weakened effect of the crack on the shaft, the equivalent line - spring model is built. then the constitutive equations are derived and the flexibility model of the rotating shaft is discussed. based on the lagrange equations, the non - linear dimensionless differential equations of the single rotor system with the disk and crack located at an arbitrary position of the shaft are obtained

    首先為處理裂紋對軸的局部削弱作用，提出了等效線彈簧模型，推導了線彈簧彈性本構關系，獲得了裂紋轉動軸的柔度模型，然後，應用lagrange方程建立了盤和裂紋處于軸任意位置的無量綱的單盤轉子系統的非線性運動控制微分方程。
  4. In this article, we give sufficient conditions for the existence of solutions to the vectorial hamilton - jacobi equations with dirichlet boundary condition : obtaining, in addition, an application to the theory of existence of minimizers for a class of non - convex variational problems

    本文給出了一類依賴于自變量和未知函數的梯度的向量情況隱式偏微分方程的dirichlet問題的弱解的存在性的充分條件，並將該結果應用到一類非擬凸變分問題中去。
  5. The present thesis employs the cone theory, monotone iterative technique, the conical expansion and compression principle, the method of upper and lower solutions, the monch theory of fixed point, and so on, to investigate the existence of solutions of sevral differential equations. the obtained results are either new or intrinsically generalize and improve the previous relevant ones under weaker conditions

    本文利用錐理論、單調迭代技術、錐拉伸壓縮不動點原理、上下解方法、不等式迭代技術、 m （ ? ） nch不動點理論等，研究了幾類微分方程解的情況所得結果或是新的，或是採用新方法在更弱條件下推廣和改進以前的結果
  6. We have investigated transport properties of electrons in magnetic quantum structures under an applied constant electric field. the transmission coefficient and current density have been calculated for electron tunneling through structures consisting of identical magnetic barriers and magnetic wells and structures consisting of unidentical magnetic barriers and magnetic wells. it is shown that the transmission coefficient of electrons in a wider nonresonance energy region is enhanced under an applied electric field. the resonance is suppressed for electron tunneling through double - barrier magnetic ( dbm ) structures arranged with identical magnetic barriers and magnetic wells. incomplete resonance at zero bias is changed to complete resonance at proper bias for electron tunneling through dbm structures arranged with different magnetic barriers and magnetic wells. the results also indicate that there exist negative conductivity and noticeable size effect in dbm structures

    對磁量子結構中電子在外加恆定電場下的輸運性質進行了研究.分別計算了電子隧穿相同磁壘磁阱和不同磁壘磁阱構成的兩種磁量子結構的傳輸概率和電流密度.計算結果表明，在相當寬廣的非共振電子入射能區，外加電場下電子的傳輸概率比無電場時增加.對于電子隧穿相同磁壘磁阱構成的雙磁壘結構，共振減弱；對于電子隧穿不同磁壘磁阱構成的雙磁壘結構，無電場作用時的非完全共振在適當的偏置電壓下轉化為完全共振，這時的電子可實現理想的共振隧穿.研究同時表明，磁量子結構中存在著顯著的量子尺寸效應和負微分電導
  7. As the applications of mixed monotone operators theory, some classes of equations are considered. some initial value problems and boundary value problems for mixed monotone nonlinear impulsive integro - differential equations and nonlinear elliptic equations are discussed. some known results are generalized under weak conditions. and initial value problems and periodic boundary value problems for mixed monotone nonlinear impulsive evolution equations are discussed by mixed monotone operators theory with considering the main properties of operator semigroup. the sufficient and necessary conditions for existence and uniqueness of their solution and coupled solution are obtained

    作為混合單調運算元理論的應用，本章討論了非線性混合單調脈沖積微分方程和混合單調非線性橢圓方程方面的一些問題，不同程度地削弱了原有的條件，推廣了已知的結果；還利用錐理論並結合運算元半群的性質及其主要特徵討論了非線性脈沖發展方程初值問題、周期邊值問題，給出了混合單調非線性脈沖發展方程的耦合周期解以及存在唯一解的充要條件。
  8. A important result is the one - orde r expression of ar ( p ) yt = dyt - 1 + e, from paralleling a high - order differential equation transformation into a one - order differential equation system, the one - order expression exposes that the ar ( p ) is only a certain more - multivariable power series process and, if a process is described as an ar ( p ), the sufficient and necessary condition is the spectrum norm a of the coefficient matrix d less than one. simplification of ar ( p ) not only brings about orthogonal f ( h ) but also provides global foretelling formula

    作者用高階微分方程化一階微分方程組的方法，獲得多元弱平穩序列p階自回歸模型的一步滑動平均表達式，證明了ar （ p ）的是一個更高維的冪級數的線性過程，從而，說明了ar （ p ）關于序列依概率成立的充要條件是：該模型更高維的冪級數的線性過程的表達式中系數矩陣d的譜范數1 。
  9. In efgm, in order to get a numerical solution for a partial differential equation, the shape function is constructed by moving least squares ( mls ), the control equation is derived from the weak form of variational equation and essential boundary conditions are imposed by penalty function method

    它採用移動最小二乘法構造形函數，從能量泛函的弱變分形式中得到控制方程，並用罰函數法施加本質邊界條件，從而得到偏微分方程的數值解。
  10. Irrigation water requirement per time = ( soil water irrigation maximum - soil water irrigation minimum ) ? scheming wetted soil layer depth. irrigation cycle and irrigation times were decided by soil water irrigation maximum, minimum and consumption velocity

    灌水周期和灌水次數由灌溉飽和點與補償點及土壤水分消耗速率決定，表現為強耗水期灌水周期短，灌水次數多，其後依次按中、弱、微耗水期灌水周期增長，灌水次數減少。
  11. Existence, uniqueness and continuous dependence of c0 solutions for an iterative functional equation related to invariant curves of functional differential equations with piecewise constant arguments are given under weaker conditions than that known results of c1 solutions. symmetry is also considered so that some obtained results are generalized to rn

    本章首先討論了與逐段常時滯泛函微分方程不變曲線有關的一類迭代函數方程的連續解的存在唯一性和連續依賴性，不但弱化了已有結果的c ~ 1光滑性的條件，還討論了連續解的對稱性，並根據對稱性將一些結果推進到高維。
  12. Perturbation solution of the weak - nonlinear partial differential equation with - function

    函數的弱非線性偏微分方程的攝動解
  13. The topological convergence of the cone weak subdifferential of set - valued mapping sequence

    集值映射序列的錐弱次微分的拓樸收斂性
  14. Stochastic differential equations ; comparison theorem ; weak convergence

    隨機微分方程比較定理弱收斂
  15. The between the most strong part of the signal and weak part electricity is even and bad. to device, the dynamic scope mean this device to handle the ability to look after both sidesing of strong or weak signal

    信號最強的部分與最微弱部分之間的電平差。對器材來說，動態范圍表示這件器材對強弱信號的兼顧處理能力。
  16. The quasi - weak convergence in c [ a, b ] is studied and applied to the boundary - value problems in the nonlinear ordinary differential equations without the assumption of the continuity, compactness and convexity

    摘要研究了連續函數空間中凹（凸）函數列的擬弱收斂性，並應用於沒有連續性緊性和凹凸性假定的二階常微分方程的邊值問題。
  17. Unlike traditional differential geometrical method, the robust adaptive neural net - based control emphasizes on the theory and application of intelligence control in nonlinear system that is weighed by robust performance index. the problem of robust reliability and stability in a kind of weak nonlinear system is first proposed in the dissertation, and then it deeply analyses and discusses the problem of how to design track controller in strong nonlinear system with uncertainties and external disturbance on the premise of guaranteeing the whole system ' s robust performance index. the distributed 3d flight simulation platform is mainly used to validate real - time program and evaluate the efficiency of advanced flight control laws, therefore, some theories and techniques related to the platform are also introduced

    基於神經網路的魯棒自適應控制研究和分散式三維飛行模擬平臺的構建是本論文研究的兩個主要內容，與傳統微分幾何方法不同的是，基於神經網路的魯棒自適應控制側重於智能控制方法在以魯棒性為性能指標的非線性系統中的理論和應用研究，論文以一類弱非線性系統的魯棒可靠鎮定問題為引線，逐步深入地分析和探討了在保證整個被控系統魯棒性能指標的前提下，對于幾類具有不確定性和外部擾動的強非線性系統跟蹤控制器的設計問題；分散式三維飛行模擬平臺主要用於先進飛行控制律的實時程序驗證和效能評估之用，因此關于平臺的一些開發原理和技術方法也在文中給出了介紹。
  18. Abstract : in this paper, the authors study the initial value problems of a class of weakly nonlinear differential equation. the first and the second order approximate solutions are obtained. their accuracies are high and the more the approximate order is high, the more the accuracy is high. if the regular perturbation method is used to solve the same problems, then, when the independent variable is big, so is the error of the solution

    文摘:用插值攝動法1研究一類弱非線性常微分方程的初值問題，得到了一級及二級近似解.解的精度很高，並逐級提高.如果用正則攝動法求解此類問題，則當自變量較大時，誤差很大
  19. The investigation of nonlinear oscillation is very important for the nonlinear science. many methods have been advanced to study weakly nonlinear system, including multiple scale method, kbm method, averaging method, and so on

    非線性振動理論是非線性科學的一個重要研究內容，對於弱非線性常微分方程式控制制的動力系統已經有了許多求近似解的方法，如多尺度法、 kbm法、平均法等等。
  20. This paper study the character and application of the solution of bsde, the main results include : for the second kind of bsde, the existence and uniqueness of the solution under non - lipschitz condition, comparison theorem and stability are established, under weaker condition, the existence of the minimal and maximal solution is proved and the application in stochastic control and utility function is given ; for the first kind of bsde, under weaker condition, the existence of minimal and maximal solution. stability, comparison theorem and application to utility function are proved

    本文研究倒向隨機微分方程解的性質及其應用，主要結果有：針對第二類方程，討論了在非lipschitz條件下倒向隨機微分方程解的存在唯一性，比較定理及穩定性等，在更弱條件下，得到了倒向隨機微分方程的最大解和最小解的存在性，在此基礎之上，給出了在隨機控制及效用函數方面的應用；針對第一類方程，同樣在較弱條件下，證明了方程最大、最小解的存在性、穩定性、比較定理及其在效用函數的應用。
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