離解方程 的英文怎麼說
中文拼音 [líjiěfāngchéng]
離解方程
英文
dissociation equation-
As for the k production in high energy hics, we firstly study k + production. the results show that the kaon flow is sensitive to both the kaon - nucleon sigma term ( s and the equation of state of nuclear matter. the collective flows of both nucleons and k + mesons need a " soft " eos with compressibility k ? 00 - 300 mev, and 2 = 200 - 400 mev seems suitable to explain the measured k + flow
研究表明k ~ +集體流在相對論重離子碰撞中對核態方程和k - n標量吸引項( _ ( kn ) )都是敏感的,計算結果表明核子和k ~ +介子的橫向集體流都需要壓縮系數在k 200 - 300mev范圍內較軟的核態方程,而大約為200 - 400mev的_ ( kn )值對解釋k ~ +流產生是合適的。Lagrange multiplicator method is introduced in the numerical computation to release the constraint. galerkin method based on the variation principle is used to solve differential and integral equations
Galerkin方法是基於變分原理基礎上的一種把微分方程或積分方程轉化為等價的變分方程,通過離散變分方程求原方程數值解的方法。In this paper, the crank - nicolson type finite difference method is applied to the benjamin - bona - mahony equation. we obtain the existence and uniqueness of the numerical solutions
在這篇文章中,使用crank - nicolson有限差分方法來離散benjamin - bona - mahony方程,得到其數值解的存在性和唯一性。In addition, in order to solve the differencing equations, feasible project is presented to deal with the first and second boundary conditions. finally, jacobi interation method is selected for the solution of the equation systems
為了實現內點離散方程組的封閉,本文就第一、二類邊界條件在計算時的處理和邊界外虛擬點的外插法求值,給出了可行的解決方案。In the discrete process the mostly used method, the control volume method, is used. in the study of gas - particle flows numerical simulation, the gemchip arithmetic is often adopted. but it cannot be used directly in the investigation of clean room because of the low volume occupancy ( its volume fraction orde r is 10 - 10 below )
採用控制體積法對氣粒多相流的控制方程進行離散,在gemchip演算法基礎上,由於室內懸浮顆粒的體積分數數量級在10 ~ ( - 10 )以下,無法直接求解,在研究中通過直接求解顆粒數密度,不直接求解顆粒的體積分數對離散方程進行了求解。A discretization equation is derived by using a finite volume method in three - dimensional cylindrical polar coordinate system. algebraic equations are solved by iteration with a line - by - line method that is a combination of tdma in axial and radial directions, ctdma in tangential direction and adi method in three directions. the pressure and velocity coupling are solved with the simple algorithm
在三維圓柱坐標下,利用有限體積法推導離散方程;在軸向與徑向用三對角矩陣法( tdma ) ,在周向採用循環三對角矩陣法( ctdma ) ,採用交替方向亞鬆弛疊代法( adi )求解方程;推導同位網格下的壓力修正方程,用simple演算法處理速度與壓力的耦合;為加速收斂,採用適當的鬆弛因子。Using the numerical computation method to simulate the pure air flowing in the plasma generator and using zero dimension theory and continuous medium hypothesis to establish the mathematical model of the plasma generator and applying the curvilinear coordinate to disperse the space of the plasma generator, applying simplec method to solve the set of discredited equations
應用數值計算的方法模擬了等離子發生器內部的純空氣流動,應用零維理論分析模型和連續介質假設建立了描述等離子發生器內部流動和傳熱的數學模型;採用貼體坐標系對等離子發生器的流場空間進行空間離散;採用simplec演算法來求解離散方程,獲得流場的數值解。In the first algorithm, a solution to transcendental equations is converted into a solution to roots of a monic polynomial, and the latter can be fulfilled easily by using functions roots or solve in matlab. in the second algorithm, taking advantage of the property that the distance between solves in a circular domain and the center of the circle is less than that of solves out
方法一:將對超越方程的求解轉化為對首一多項式的根的求解,然後利用matlab的roots或solve函數進行求解;方法二:利用圓形區域內超越方程的解與圓心的距離小於區域外的解與圓心的距離和fsolve函數求解方程時優先搜索離初值最近的解的特點,將圓心坐標值作為fsolve函數求解的初值,先求解出包含指定區域的圓形區域內的解,再從中找出指定區域內的解。Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives are estimated using a least - square curve fit on local clouds of points. the paper gives discrete form for euler equations on base of gridless method, and adopts five steps runge - kutta scheme for time - marching. the numerical results have been obtained for the 2 - d flows over airfoils or multi - element airfoils using the method presented
本文首先對無粘euler方程進行無網格離散,並運用顯式runge - kutta格式推進求解,成功地數值模擬了二維單段和多段翼型的繞流;在此成功的基礎上通過在euler方程的右端加入粘性項,使求解方程變為層流navier ? stokes方程,得到了翼型繞流,數值結果顯示出粘性的影響。Non - oscillatory and non - free - parameters dissipative ( nnd ) finite difference scheme ( a total variation diminishing scheme ) with second order accuracy was adopted to solve the fluid dynamic equations, a finite rate chemical reaction model was developed to calculate ingredient producing rate, and an adi over relaxation iteration technique was used to solve the electromagnetic discretized equations
採用二階精度nnd格式求解流體力學方程組,採用有限速率化學反應模型計算組分生成率,採用交替方向隱式( adi )超鬆弛迭代法求解電磁場離散方程。The control equation consist of completely coupled deformation equation, seepage equation, conduction and convection equation of heat, which describe the reservoir non - liner performance. 2, present the detailed strategy and methods to solve this mathematics model, the basic strategy as follows : regard the deformation equation ? seepage equation conduction and convection equation of heat as separate system, and solve the equation by coupling and iterative method ; disperse the control equation in the geometry field by the finite element method ( galerkin ), and in the time field by the finite difference method : programme the computer program on this task ; when the solving, take the combinative measures of the thick and thin mesh ; successfully carry out the numerical simulation in vast 3d heat extraction system of hdr
2 、提出了高溫巖體地熱開發的固、流、熱多場耦合數學模型的數值解法,其基本的求解策略是:將固體變形,流體滲流與溫度場方程看成獨立的子系統,耦合迭代求解;利用有限元離散( galerkin )方法將控制方程在幾何域上離散,並用差分法得到時間域上的離散方程,並在此基礎上,編制了相應的計算機源程序;有限元求解中,為減小邊界效應的影響,在計算中採取粗細網格結合的方法,順利地實現了高溫巖體地熱開發三維巨系統的數值模擬。E ) applying the inter - phase slip algorithm ipsa method to solve the set of discretized equations
對燃燒室擴壓段的計算區域離散採用了貼體坐標系; e採用了ipsa演算法來求解離散方程。This paper adopt the ~ model of standard turbulence, apply staggered grid and finite volume approach discrete equation analysis
本文採用標準湍流K模型,應用交錯網格和有限容積法離散方程求解。In order to implement efg method through computer program, the discrete equation from the variational principle ( weak form ) and the numerical implementation are described
再次,論述了無網格伽遼金方法的位移近似函數和權函數,給出了變分方程及離散方程,以及數值求解的實現。The discrete equation was deduced by control volume integral method, and realized by numerical method
用控制容積積分法導出了離散方程,並用數值方法進行了求解。For solving the corresponding discretization equation, there are few re - sults on the construction of efficient solvers. most existing results only presented the related error estimate for a concrete problem discretized by covolume methods. in this paper, hierarchical basis method, domain decomposition method and precondtioned gmres method are constructed
並且大部分已有研究結果均集中於給出對某一具體問題用有限體積法離散后的誤差估計,而對于如何高效求解其離散方程,這一無論從理論上講,還是從實際應用角度出發都具有重要意義和巨大實用價值的問題,目前這方面的研究結果還很少。Differential method is used for the discretion of time zone, and a direct solution method and an incremental solution method are given out for the solution of the non - linear system equation
求解方程時,在時間域上採用差分法進行離散,給出了求解系統方程的直接法和增量法。In order to save time and reduce computational complexity in geometric calibration, a new idea is introduced, a new method on basis of it is presented. the image distortions are decomposed into nominal distortions, caused by nominal scan mirror and spacecraft motion, and seven perturbations, caused by deviations from the nominal motion. the paper analyzes each perturbation, build up a new equation to solve line of sight
為了快速地進行幾何校正,引進了一種新的思路,並加以改進,將圖像上的扭曲分解為標稱掃描鏡和衛星運動引起的和七個偏離標稱運動的微擾量引起的兩個部分,引進了一種用偏導求視線的簡便方法,詳細分析了各個微擾量造成的影響,建立了新的視線求解方程。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。The thesis is divided into two parts. in the first part of the thesis, we discuss the solution of the discrete linear systems of the equations by the generalized minimal residual ( gmres ) method
本文分為兩部分,第一部主要考慮在給定參數(包括積分節點的選擇和核函數的逼近方法)的情況下,如何應用廣義極小剩餘法( gmres )求解離散方程組。分享友人