numerical operator 中文意思是什麼

numerical operator 解釋
數字運算元
  • numerical : adj 數字的;數值的;用數字表示的。 (a) numerical order 號數。 a numerical statement 統計。 the ...
  • operator : n 1 操作者,機務員;司機,駕駛員;【軍事】電話兵;【電話】接線員,話務員(=telephone operator)...
  1. The algorithm analysis and numerical tests have shown that the algorithm proposed in this paper is stable and highly effective, which provides a new useful tool for solving the operator equations of the first kind

    文中還對實施演算法的若干技術問題進行了討論。數值實驗結果表明本文提出的演算法是穩定高效的,為第一類運算元方程的求解提供了一個新的有效工具。
  2. At first, based on the simple genetic algorithm, an improved ga which adopts a combination of emigration policy and adaptive operator is presented. results of numerical optimization show that the improved ga is effective on preventing premature problem

    本文在基本遺傳演算法的基礎上首先研究了浮點編碼遺傳演算法在數值優化中的應用,通過引進「移民策略」和自適應運算元相結合的方法,改進了基本遺傳演算法在後期進化緩慢的問題,極大地減少了早熟性收斂的現象。
  3. _ _ _ _ uncertain factors of macroscale inversion analysis of displacements are summed up. associated inversion model containing non - deterministic factors is proposed, i. e. " deterministic inversion of differential equation + systematic optimization technique = non - deterministic inversion ". the systematic optimization technique includes direct operator optimization, direct numerical analysis optimization, measurement design optimization, measured data processing, in - ersion algorithm optimization, and inverse operator regularization, etc. when this associated inversion technique is used in displacements back analysis, uncertain factors can be processed quantitatively

    歸納了宏觀尺度位移反演分析的不確定性因素,提出了容納不確定性因素的位移反演分析的聯合反演模式,即「微分方程確定性反演+系統性優化技術=非確定性反演」的模式,並具體論述了聯合反演模式的系統性優化技術,包括正演運算元的優化、正演數值分析的優化、測量設計優化、觀測數據處理、反演演算法優化、反演運算元處理等六個優化方法。
  4. In term of analyzing and summarizing the existing achievement, propose an advanced and practical wavefield extrapolation operator and arithmetic of forward modeling and migration, which obtain numerical simulation and analysis completely and systemically and exploited new field of fractured reservoir seismic wavefield numerical simulation and applicationin in frequency - wavenumber domain

    在總結、分析前人研究成果的基礎上,提出了具有前瞻性和實用性的波場延拓運算元與正演、偏移演算法,較系統全面地進行了數值計算與分析,開辟了頻率?波數域縫洞儲層地震波場數值模擬與應用的新領域。
  5. Comprehensively discuss the issues in application, adaptive condition and performance, propose a fast arithmetic of forward modeling and depth migration in common shot gathers with one - way acoustic wave equation based on vrselrf, and verify the arithmetic by numerical simulation. concisely discuss the cause of the creation of evanescence and the problem of lateral amplitude discontinuity result from it. fourthly, use the reflectivity model, computed to describe the fracture model, with the formula of computation reflectivity based on elastic - acoustic approximation, and the wavelet model computed by the method, wavelet creation with fourier transform, we proposed, in conjunction with vrselrf wavefield extrapolation operator

    第三,將頻率波數域穩定的變參考慢度rytov近似廣義屏波場延拓運算元( vrselrf )應用於疊前與疊后正演模擬、疊前與疊后深度偏移,對演算法應用中應注意的問題、適用范圍、性能等作了較為全面的論述;提出了基於vrselrf的單程聲波方程共炮記錄正演模擬和深度偏移快速演算法,並通過數值模擬試驗對演算法進行了驗證;簡要地討論了倏逝波的產生原因及其帶來的橫向振幅不連續性問題。
  6. The paper concentrates on seismic wave - field forward modeling and migration for the fractured reservoir. it researches the wavefield extrapolation operator for lateral variation of velocity, design four theoretical models and seven practical models with fracture and cavity. base on the progenitor, in the frequency - wavenumber domain with the pspi wavefield extrapolation operator and arithmetic of forward modeling and migration that applied lateral variation of velocity which is strong, the paper obtains the result of numerical simulation and the wavefield characteristic by the way of the forward modeling and depth migration of poststack seismic wavefield

    本文圍繞縫洞儲層地震波場正演與偏移問題,研究了適用於橫向變速波場延拓運算元,建立了四個理論的縫洞模型和七個實際的縫洞模型,在總結、分析前人的研究成果的基礎上,利用適合橫向速度劇烈變化的相移加插值的波場延拓運算元,在頻率?波數域對上述的地質模型進行正演、偏移處理,最後得到了縫洞儲層地震波場的一些特徵。
  7. Firstly, in the reproducing kernel space, the spline function is discussed and its equivalent relations are gived ; we prove that the 2 - th differential operator interpolation spline function in the space can be expressed not only by the reproducing kernels but also by polygonal functions. so it is easy to prove its best approximation properties in theory and is convenient for numerical calculation in applications, too

    首先,在再生核空間中討論樣條函數,給出其等價性條件;證明了空間中的一個二階微分運算元插值樣條既可由再生核函數表示又可由折線函數表示,這不僅在理論上便於獲得此種插值樣條函數的最佳逼近性質,而且在應用上也便於數值計算。
  8. Influencing factors of buried pipeline ’ s damage and numerical modeling are investigated. complex site conditions, fault and fluid - pipe coupling are considered. considering soil - pipe interaction, boolean operator is used to merge site and pipe, and site - pipe physics contact is solved through soil - pipe friction

    考慮到場地和管道間的相互作用,在adina三維有限元建模過程中,應用布爾操作實現場地與管道間的幾何融合,並通過管土摩擦解決場地與管道間的物理接觸問題。
  9. When the author sets up the mathematics model with describing the process of two - dimensional debris flow, he develops the continuity equation by the law of conservation of mass and establishes the momentum equations by the law of conservation of momentum. the author makes full use of the advanced computer technologies, establishes the finite difference equation of numerical simulation by the differential operator fission method, and writes programs for computers which contact friendly with the other programs. the parameters are directly input on the keyboard

    在泥石流堆積數值模擬方面,作者以前人工作成果為基礎,在建立數學模型時,根據質量守恆原理,推導建立了泥石流連續性方程,根據動量守恆原理,推導建立了泥石流運動方程;在數值解法上,充分利用高速發展的計算機技術,採用運算元分裂法建立數學模型的差分格式,開放式編製程序,人機對話方式設置參數,計算機程序具有通用性、可擴展性和易維護性。
  10. The hydraulic hitch is the common means that the operator be joined with the prime motor in farm machine. the paper made the hitch ? vector equation and found the solutions by newton iteration method through the strong numerical calculation function of computer. so the analytical solution insteaded the graphic method, the design accuracy and efficiency were acceptable

    本研究推導了懸掛機構的矢量方程,並藉助于計算機強大的數值計算功能,用牛頓迭代法解決了解矢量方程的問題,從而用解析法取代了圖解法設計此類機構,提高了設計精度和效率。
  11. On three - dimensional numerical solution of incompressible viscous flow by osfem abstract an algorithm for solution of three - dimensional navier - stokes equations for incompressible viscous flow is developed. a decoupled algorithm based on the operator - splitting technique is applied

    由於三維粘性流動的復雜性,例如流動邊界的選取、控制條件的給定以及混合運算元方程高精度數值解法等,都值得探討和研究。
  12. The subject is related and has applications to many different branches of pure and applied science such as operator theory, functional analysis, c " - algebras, banach algebras, matrix norms, inequalities, numerical analysis, perturbation theory, matrix polynomials, systems theory, quantum physics, etc. in recent years, the quadratic numerical range, one of the most important generalizations of the numerical range, was put forward in the course of people studying the spectral theory of the block operator matrix to the need of the development of some branches mentioned above

    對它們的研究涉及到了基礎數學及應用數學許多不同的分支,諸如運算元理論,泛函分析, c ~ * -代數, banach代數,矩陣范數,不等式,數值分析,擾動性理論,矩陣多項式,系統論,量子物理等等,並且在這些分支上面得到了廣泛的應用。近年來,為了上述某些數學分支發展的需要,人們在研究分塊運算元矩陣譜理論的過程中引入了數值域的一個重要推廣:二次數值域。
  13. To study the realizition of the delta operator, we simulated and obtained a series of figures using matlab. from these figrues it can be seen that the delta form has clearly superior numerical properties ralative to the shift form

    對于delta運算元的實現問題,本文通過一個例子用matlab語言進行編程,仿出一系列圖形,通過比較可以得出delta運算元相對于移位運算元有較好的數字特性。
  14. Finally, by means of time evolution operator and numerical calculations, the time evolution of the atomic population, the atomic dipole squeezing, the time evolution of the squeezing and coherence properties of the light in the system of the two identical two - level entangled atoms interacting with the coherent optical field have been studied

    論文的第三部分工作是採用時間演化算符和數值計算方法,研究了兩全同二能級糾纏原子與相干態光場相互作用過程中,原子布居、原子偶極壓縮、光場的二階相干和光場壓縮性質的時間演化特性。
  15. In this paper a numerical method for equations of transport and biodegradation in the fractured media is discussed. because the equations consist of terms related to advection, diffusion, biochemical as well as the term of exchange betwen the fracture and the porous media, it is very difficult to find their solution. in order to find more efficient method for solving these equations, several numerical methods for the equations without biochemical terms are discussed first. the numerical results show that the cubic spline method can be used to solve advection flow dominated problem which often occurred in the fractured media. then, the equation with both advection - diffusion term and biochemical term are discussed. the splitting - operator is used to decouple the advection and diffusion terms with biochemical term in the equations. the way to determine the smaller time step for solving fast biochemical terms is introduced through comparing the order of characteristic time of biochemical term with that advection ( diffusion ) term. numerical simulation results show that good agreement between analytical solution and experiment result is attained

    本文討論了含裂隙介質地下水污染物輸運與生物降解非線性方程組數值求解方法.方程含有對流項、擴散項、生長、死亡、吸附、解吸、趨化和孔隙與裂隙介質界面間的交換項的非線性偶合,使演算法十分困難.本文討論了無生化過程時的幾種求解方法,數值結果表明:用三次迎風插值法對常見的對流項占優勢,且場變量有較大梯度的問題較適用.在討論有生化反應過程時,利用對流項與生化反應項的特徵時間量級估算,給出了求生化過程作用子步的時間步長估算辦法.用上述方法所得到的模擬結果與解析解、無化學反應和有化學反應的實測值對比,吻合很好
  16. Abstract : we conduct a theoretical study on the properties of a bound polaron in a quantum well under an electric field using linear combination operator and unitary transformation methods, which are valid in the whole range of electron - lo phonon coupling. the changing relations between the ground - state energy of the bound polaron in the quantum well and the coulomb bound potential, the electric field strength, and the well width are derived. the numerical results show that the ground - state energy increases with the increase of the electric field strength and the coulomb bound potential and decreases as the well width increases

    文摘:採用線性組合算符及幺正變換方法研究了電場對量子阱弱耦合束縛極化子的性質的影響.推導出量子阱中束縛極化子的基態能量和庫侖束縛勢、電場和阱寬的變化關系.數值計算結果表明,基態能量因電場和庫侖束縛勢的不同而不同,隨電場和庫侖束縛勢的增大而增大,隨阱寬的增大而迅速減小
  17. This thesis is to present and analyze one class of regularized multi - grid algorithms ( rmga ) for solving operator equations of the first kind. the rmga employs tikhonov ' s regularization to solve the corase grids equations with a new choicing parameter ' s posteriori - method for improving the numerical stability, and adopts a new smoothing strategy to correct the solutions on the fine grids for preserving the high efficiency of mgm. meanwhile, some key technical problems in the process of implementation of rmga are disscussed

    本文將提出一類適合第一類運算元方程的正則化的多重網格演算法,它結合一種新的正則參數選取準則,應用tikhonov正則化來求解粗網格方程保證了求解的穩定性;而在將解向細網格延拓時使用了一種新的光順處理策略。
  18. The algorithm problem of solving the nonlinear operator equations f ( x ) = 0 in banach space has been one of the most interesting problems for many numerical scientists for a long time. at present time one of efficient algorithms to solve this problem is the iterative method. the king - werner method is a efficient one for solving the nonlinear equations

    求解banach空間中非線性方程組演算法問題,一直是數值工作者感興趣的問題之一,迭代法是求解次類方程的一個重要演算法同,解非線形方程組f ( x ) = 0的king - werner迭代法是一個計算效率較高的演算法。
  19. An extended ad tool xadmat, which is derived from admat, the operator - overloading ad tool in matlab, is developed to realize both numerical and symbolical ad. xadmat is successfully applied to an alkylation process optimization problem

    開發了能同時實現數值自動微分和符號自動微分的擴展的自動微分工具- - xadmat ,並將其成功地應用在一個典型的過程系統優化問題中。
  20. Nonlinear operator theorem is now a focus in nonlinear theorem. the study of the ergodic theory for semitopologocal semigroups of nonlinear operators began in the middle of 1970 ' s. it got great development because it was widely used in many problems, such as the numerical solution of differentiable equation, the existence theory of positive solution, contral theory and optimization

    非線性運算元理論是非線性理論中的熱門話題,它的研究始於上世紀七十年代中期,由於它被廣泛的應用於微分方程的數值解、正解的存在性理論、控制論以及最優化等問題中,因而得到了很大的發展。
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