numerical boundary condition 中文意思是什麼
numerical boundary condition
解釋
數值邊界條件-
Three mathematical models are presented to express the characteristics based on the systematical analysis of mechanical, hydraulic and fluid dynamic characteristics during three transient process, and numerical calculation methods are carried out to the three mathematical models. with the rigid water hummer theory and hydraulic characteristics, this paper has improved the boundary condition equation at pump during the suspending period, and drew a simplified mathematical model
針對大型低揚程泵站過渡過程的具體特點，利用剛性水錘理論，對事故停泵時泵處的邊界條件方程進行改進，並結合泵裝置水力特性，得出大型低揚程泵站停泵過渡過程簡易計算方法的數學模型；針對具體數學模型編製程序進行計算求解。 -
The numerical method based on the coupling of the finite difference method in time domain with the discrete fast fourier transform is applied to calculate the first four eigenfrequencies and eigenfunctions of the six - cavity with open boundary. the absorbing boundary condition for tem wave is tested numerically, and it is applied to writing the code. the cold testing of the cavity is done and the results are good agreement with the numerical results
計算x波段六腔開放腔前四個模式的場分佈;根據第二章公式分別計算x波段六腔開放腔前四個模式的電子負載電導並總結了這四種工作模式渡越效應的規律，基於這種小信號理論分析了x波段渡越輻射振蕩器，得到了工作模式及可能產生的模式競爭。 -
Based upon the forward simulation principle of ground penetrating radar, this article analyzes the realization method of the half grid spacing and the half time increment in difference format, at the same time analyzed the produce of the numerical frequency dispersion, then deduced the ideal frequency dispersion relationship and the super absorbing boundary condition
摘要本文從地質雷達正演原理著手，分析了差分格式中半空間步長與半時間步長的實現方法，同時通過分析數值頻散的產生，進而推導出了理想頻散關系和超吸收邊界條件。 -
Abstract : this paper discusses high order numerical model of non - linear boundary equation. by using integral technique, the boundary condition problem is turned into a form initial condition problem. we construct 4 order numerical formula. the convergence theory is given and proved. the examples show that our method has fast convergence speed and less numerical time
文摘:討論非線性邊值問題的一種高精度計算模型.利用積分值將邊值問題轉化為形式初值問題，構造了一類四階精度的計算格式，證明了收斂性.通過算例表明該方法收斂速度高，計算量小 -
Through the choice of combustion controlling equation, the close of equation group and the decision of boundary condition, it completely introduces the numerical simulation theory with flame combustion on the heating furnace for carrying crude oil
通過燃燒控制方程的選用、方程組的封閉以及邊界條件的確定，系統介紹了原油輸運加熱爐煤氣有焰燃燒數值模擬的理論基礎。 -
In numerical computation aspect, by implying new computational geometric field, computation error caused by boundary condition was decreased
在數值計算方面，本文採用了新的計算域，減小了由於邊界條件造成的計算誤差。 -
The flexible retaining structure is another important retaining structure in soft soil. the integrated numerical analysis of this retaining structure ( including the methods and theory of calculating active earth pressure under sorts of conditions as well as the calculating method of horizontal stiffness coefficient of bracing structure and the method of deciding boundary condition etc. ) was gived. the effect of all parameters on the characteristics of retaining structure was discussed using methods of sensitivity - analysis
本文針對目前常用的彈性支點法，給出了完整的數值分析方法，包括各種條件下的墻後土壓力的計算方法和原理、支撐系統（或錨拉系統）水平剛度系數的計算、邊界條件的確定方法等，並以此為基礎採用靈敏度系數分析方法討論了各參數對圍護結構形態的影響，指出土體側向基床比例系數是影響圍護結構變形的最主要的參數。 -
Compared with other general cfd software, the numerical modeling software of combustion process improved by the author of this paper has following features : ( 1 ) it can adjust the corresponding parameters and manipulating methods according to furnace architecture, operational parameters and fuels etc. ; ( 2 ) it can arrange the nodes of grid flexibly and also make special calculation to certain nodes, which cannot be accomplished by the general commercial software ; ( 3 ) in the boundary ( water - cooled wall ) condition processing, the third boundary condition is selected for the temperature calculating, linking the combustion process inside the furnace with the flow and heat exchange of water inside the water - cooled wall, so the heat absorbing and the influence of the water - cooled wall to combustion process and heat transfer of furnace are explicitly explained
與其它通用的cfd軟體相比，經論文作者所改進的燃燒過程數值模擬軟體的特點在於： （ 1 ）能夠結合爐子結構、運行參數及燃料等，調整模型中相應的參數及處理方法； （ 2 ）可以靈活的安排網格節點，對某些節點進行特殊處理； （ 3 ）在邊界（水冷壁）條件的處理上，溫度選用了第三類邊界條件，把爐內燃燒過程和水冷壁內工質的流動和換熱聯系了起來，使得水冷壁內的吸熱情況對爐內的燃燒和結渣的影響充分體現出來。 -
In the paper, on the basis of expounding the importance of similarity theory in the numerical simulation of tectonic stress field, it is pointed out that, only by making the numerical model be similar to the geological prototype in material, combination pattern, boundary condition, loading mode and cracking criterion, etc., may the simulation result be real
摘要論述了在構造應力場模擬中相似性原理的重要性，指出地質原形與數值模型在材料、組合形式、邊界條件、受力方式和破裂準則等方面必須相似，模擬的結果才具有真實性。 -
The simulation methods and content about the mesh generation, the boundary condition of rotating wheels and moving ground of single car, and about the steady study on the two car running in row and overtaking process has shown the calculation results reliability and the numerical simulation methods feasibility. based on the comparison and analysis of mesh strategy, the descartes mesh strategy and the tetrahedron + prism mesh strategy are chosen. the continuous unsteady overtaking process of the vehicles, traveling with constant but unequal speed is replaced by a finite numerber of steps ; in each the relative position of both vehicles changes
最後利用滑動交接面技術和動網格技術進行了瞬態的轎車超過某國產大型運輸車的數值模擬研究，在此之前國內外對此項技術均未有系統的研究和可借鑒的結論，以側向間距0 . 5倍轎車車寬為典型，用定性和定量兩種方法對比分析了超車過程中的轎車和運輸車與其單車情況及前文穩態模擬的異同，並將六種側向間距的瞬態結果與單車情況和穩態模擬結果進行了對比分析。 -
In this paper, deconvolution and linearized inversion of receiver function are improved ; multi - channel deconvolution and wavelet inversion are developed for receiver function. the elastic wave motion equation is applied in the simulation and migration of receiver function in lateral inhomogeneous media, multi - grid algorithm is introduced in numerical modeling of elastic wave motion equation, and phase - delay boundary condition is also provided to absorb boundary reflection
在此基礎上，重點研究和發展了橫向非均勻介質中，基於波動方程的數值模擬與偏移成像方法，首次將多重網格演算法引入到彈性波方程的數值模擬和接收函數的偏移成像，還發展了一種延遲邊界方法，以消除人為邊界反射的影響。 -
In order to study the characteristics of the stepped spillway overflow comprehensively and seek for the measure to increase the energy dissipation of the stepped spillway at large unit discharge, the method of turbulence numerical simulation and model test are used to study the stepped spillway overflow. in view of the curved free water surface, complicated boundary condition and turbulence flow, it very difficult to simulate the stepped spillway overflow
為了對階梯溢流壩面流場特性進行全面的研究，同時探求在大單寬流量下提高階梯溢流壩消能率的措施，本文採用紊流數值模擬與實驗相結合，數值計算為主、實驗為輔的研究方法對階梯溢流壩面流場進行了較系統深入的研究。 -
Numerical solution of the singularly perturbed problem with nonlocal boundary condition
具有非局部邊界的奇異攝動問題的數值解 -
This thesis contributed to the comprehensive study of the finite - difference time - domain ( fdtd ) method and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies. the work includes mainly three parts : the study on the performance of pml absorbing boundary condition applied to pseudo low frequency electromagnetic problems ; the validation of the fdtd method with pml absorbing boundary conditions and the corresponding computer software based on the numerical study of the electromagnetic field of an electric dipole antenna, and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies ; the development of an improved alternating direction implicit finite - difference time - domain method
在綜合前人工作基礎上，本文對時域有限差分（ fdtd ）法及其在開關電源輻射電磁場數值計算中的應用進行了系統的分析和研究，其核心內容包括：偽低頻電磁場數值計算中pml吸收邊界條件性能的研究；基於基準問題?電偶極子天線三維輻射電磁場，驗證了本文構造的基於pml吸收邊界條件的三維fdtd法及其計算軟體，並應用於高頻開關電源輻射電磁場的數值分析；提出了一種改進的交替方向隱格式時域有限差分法。 -
The mathematics model, physics model and geometrical model for numerical simulation about microbus temperature field is built based on the microbus " s thermal translating and substance translating theory. the method for building geometrical model and boundary condition is put forward. the numerical simulation for microbus sc6350 is accomplished with the computational fluid dynamics ( cfd ) software of star ? d
結合微型麵包車的傳熱與傳質機理以及sc6350車型，建立了溫度場模擬的數學模型、物理模型和幾何模型。捉出了合理的微型麵包車溫度場模擬計算的建模方法和溫度場模擬計算的邊界條件。並採用計算流體力學（ cfd ）軟體star - cd對微型麵包車sc6350進行了多種工況的模擬計算。 -
We solve the differential equation by means of the numerical analysis with the boundary condition and repeat the work about the transmittance of van doom with jones matrix method
結合液晶光學中的瓊斯矩陣方法（ jonesmatrixmethod ）重復了vandoorn等人對透射式液晶顯示的研究工作。 -
Then the pro ? models have been input into pro ? m, an automatic mesh generating software, to create the mesh system for numerical simulation. after defining some proper boundary condition, the flow analysis have been performed through the use of star ? d, a powerful cfd software. with some careful analysis of the simulation results and comparison of the two models, some guiding principles for the design optimization of the compressor inlet turning tubes have been concluded
論文主要工作包括：通過對壓氣機進氣彎管幾何形狀的深入分析，利用三維建模軟體pro / e生成其三維幾何模型；利用網格自動生成工具pro - am ，根據pro / e生成的三維幾何模型生成了數值模擬所用的計算網格；對壓氣機進氣彎管內部流動進行了詳細的氣動計算，對原進氣彎管與新型進氣彎管的計算結果做了對比分析，對其結構的優化設計提出了指導原則。 -
A numerical method, based on single temperature sensor, constant heat flux assumed and arbitrary number future time steps, was employed to determine the heat flux during rapid cooling on high temperature surface with multiply immersed impinging water jets the finite volume discretization method and treatment of boundary condition were presented
摘要基於單點測溫、常熱流假設，任意未來時間步長的導熱反問題演算法求解浸沒水射流冷卻過程的熱流密度；採用有限容積法離散方程，附加源項法處理邊界條件。 -
First, the difference equation, numerical stability condition, boundary condition, power sources settings and some improved speedup techniques of the finite - difference time - domain yee computational method were introduced briefly in which with the multi - time step method and the frequency - dependent finite - difference time - domain ( ( fd ) 2td ) method emphasized
首先，本文簡單介紹了建立電磁模型中所需採用的時域有限差分yee演算法的差分方程、穩定性條件、邊界條件、激勵波源設置等的基本原理和一些用於加速fdtd演算法的改進方法。其中，詳述了多時間步長（ mts ）方法和頻率相關時域有限差分（ （ fd ） ~ 2td ）方法。 -
Another contribution in this paper is that a novel absorbing boundary condition based on the one - way wave equations has been proposed. it is more effective both in theoretical analyses and numerical simulations when compared to other widely used boundary conditions such as second order mur abc ' s
本文的在應用對時域有限差分法的同時，也對其吸收邊界條件進行初步研究，提出了一種新的局域吸收邊界條件，並通過計算機模擬證明了這種邊界條件的有效性。
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