time discretization 中文意思是什麼
time discretization
解釋
時間離散化- time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
- discretization : 離散化
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In this paper, a crank - nicolson mixed element method, a nonlinear galerkin mixed element method for the non stationary conduction - convection problems time second order accuracy fully discrete formats and a two - level mixed element method with backtracing for the stationary conduction - convection problems are presented and analyed, respectively, an error analysis are provided for the crank - nicolson method of time discretization applied to spatially discrete galerkin mixed element approximations of the nonstationary conduction - convection problems
本文分別給出了非定常的熱傳導-對流問題的crank - nicolson混合元法時間二階精度全離散格式，非線性galerkin混合元法時間二階精度全離散格式以及定常的熱傳導-對流問題回溯二重水平法。討論了時間上的crank - nicolson離散方法應用於非定常的熱傳導-對流問題的空間離散的galerkin混合元近似。 -
Compared with octree data structure, the omni - tree data structure could reduce the meshes " total numbers and get better mesh quality. this paper uses cell - centered finite volume spatial discretization and four - stage runge - kutta time - stepping scheme with some convergence acceleration techniques such as local time stepping and enthalpy damping
在流場計算中，本文採用格心格式的有限體積法用二階中心差分對歐拉方程作空間離散，用四步龍格庫塔方法作顯式時間推進。 -
In this paper, the upwind scheme and the central scheme are presented for solving 3 - d n - s equations using the cell - center finite volume spatial discretization and four - stage runge - kutta time stepping scheme, with standard convergence acceleration techniques such as local time stepping and implicit residual smoothing
在n - s方程的數值計算上，採用了中心差分格式和迎風格式，用格心格式的有限體積法進行了空間離散，用四步龍格?庫塔法作顯式時間推進，並採用了當地時間步長和隱式殘差光順等加速收斂措施。 -
By use of - perturbation method with spatial discretization, the hydraulic transient system controlled by quasilinear partial differential equation was converted to a time - continuous linear system, so that the inverse problem of hydraulic transients under limited pressure could be sol ed with the optimal control theory for time - continuous systems
採用-攝動法並經過空間離散，將由擬線性偏微分方程式控制制的有壓瞬變流系統轉化為時間連續線性系統，從而使有壓瞬變流限壓控制反問題能應用時間連續系統最優控制理論來求解。 -
The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system
本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。 -
In part i, based on the systematic review of the study history and prospect of nwt, the detailed process of a 2 - d nwt model developed independently is reported. the two key discretization methods, boundary element method ( bem ) and mixed eular - langurange ( mel ) method, are introduced in detail, and an integrated flow chart of the detailed time - domain simulation steps of nwt is presented
第一部分在回顧數值波浪水槽發展歷程、現狀及其應用前景的基礎上，重點報告本人獨立開發二維非線性數值波浪水槽模式的研究工作，其中包括構建數值波浪水槽的運行原理和具體步驟等全過程。 -
Using the approximation form of lumped mass matrix instead of the mass matrix in finite element discretization in space, backward differencing scheme in time, an implicit computational scheme is yielded, it proved the convergence estimate for this implicit scheme
對有限元離散中引起較大誤差的質量矩陣，採用了近似形式的集總質量矩陣來代替，時間項採用向後差分，得到了一個隱式的計算格式，證明了計算格式的收斂性及其收斂速度估計。 -
In rotating frame of reference, the construction method of three dimensional finite volume tvd schemes is systemically analyzed, in which implicit euler defiference is applied for time discretization
在旋轉坐標系下，發展了一種含旋轉源項的雷諾平均navier - stokes方程的三維有限體積tvd格式，時間離散採用隱式euler方法。 -
Visual programming of the bscas ( bridge structure constructional analysis system ) is realized, the mechanism of establishment and discretization of diagrammatic drawing of bridge structure has been analyzed in details with the theory of mechanics and finite element method. at the same time, theory, function and applicability of the program have also been discussed in the paper
編制了bscas大跨度橋梁結構施工分析軟體，從力學和有限單元法原理對橋梁結構計算圖式的建立和結構離散化原理做了較為詳盡的剖析，對程序的編制原理、功能以及適用范圍做了詳細的說明和討論，提出了一些自己的認識和觀點。 -
On the basis of some conclusion, we have proved that the schemes have second - order convergence accuracy for the time discretization, a two - level method for resolving the nonlinearity in finite element approximation of the stationary conduction - convection problems is presented
在某些已有結論的基礎之上，我們證明了這種格式對于時間離散上的二階精度。提出了一種解決定常的熱傳導-對流問題的有限元近似中出現的非線性問題的兩層方法。 -
In this paper, we analyzed and discussed the basic principle of the recently developed high order accuracy finite difference schemes ? eno schemes and weno schemes. based on 2nd order nnd schemes, we introduced a 3rd order wnnd scheme with jiang and shu ' s " weighted " idea and a tvd runge - kutta time discretization method
對于新近發展起來的eno格式和weno格式，本文分析並討論了其基本構造原理，並且在二階nnd格式的基礎上，利用jiang和shu的加權思想和具有tvd性質的runge - kutta時間離散方法，建立了時、空三階精度的wnnd格式。 -
Research on rough set discretization of time - series test data
時序測試數據的粗糙集離散化方法研究 -
A further study has been made about decision tree classification, bayesian network, and discretization of conntinuous attributes, at the same time many kinds of classfication algorithms have been achieved
對決策樹分類、貝葉斯網路和連續屬性的離散化問題進行了的研究，實現了多種分類演算法。 -
The main numerical method of this code is coming from scheme ( jameson, schimit and turkel ) : using cell - centered finite volume method as spatial discretization tools, and a system of ordinary differential equations for time variable is obtained, which is solved by utilizing five - step runge - kutta scheme as time marching method, introducing artificial dissipation to damp high frequency oscillations near the shock and stagnation point
本論文採用歐拉方程作為控制方程，利用中心有限體積法進行空間離散，得到對時間變量的常微分方程組，採用龍格庫塔多步法進行時間積分，加入人工粘性以消除激波和駐點附近的壓力振蕩等方法來對naca0012翼型的實際流動進行并行數值模擬。 -
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。
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