计算稳定性 meaning in Chinese
computational stability
Examples
- It shows that for some difference equations , we ' d better adopt the expansion equations in the process of the heuristic method being applied to these difference equations
结果表明，对于部分有限差分方程，在用启示性方法分析其计算稳定性的过程中最好采用从差分方程推导来的展开式以期得到较合理的结果。 - In the numerical simulation of hypersonic chemical nonequilibrium flows , species density may become negative at the beginning of calculation , chemical stiffness is the main reason that affects the calculation ' s stability and convergence
摘要高超声速三维化学非平衡绕流流场的数值模拟中，在计算初期容易发生组元密度出现负值的非物理现象，另外源项的刚性是影响计算稳定性和收敛速度的主要原因。 - And reliability and accuracy of inversion results would be enhanced obviously . on the other hand , wavelet threshold optimization method for digital data processing and quantized monotonic denoising method for non - digital data processing are established . and multiscale denoising function and computation stability of these two methods are compared with each other
反演数据多尺度处理的数值试验说明，量化单调消噪方法不仅适合于非数字式数据的处理，也适合于数字式数据的处理，而且能大幅度降低数据的噪声，提高反演结果的可靠性与准确度，且具有较强的适应性和计算稳定性。 - Important missing aspects are : turbulent flow , numerical discretization techniques specially the relevant and difficult topic of numerical treatment of advection and related numerical methods of solution , variable property fluids , boundary layers , stability , etc . rather , it focuses on more primitive and fundamental issues of numerical treatment of advective equation and proper formulation of initial boundary value ( ib vp ) . numerical problems associated with advective dominated transport include spurious oscillation , numerical dispersion , peak clipping , and grid oriention . however , the key of numerical solution of three - dimensional advective problem is searching for a high - precision interpolating function , which can keep the computational stability and low damping
3 、针对三维纯对流方程提出了实用的拟协调单元模式，并与线性插值模式和协调单元模式比较后表明，在物理量大梯度变化的情况下，线性插值模式会产生较大的数值阻尼，导致解的失真；协调单元模式具有极高的计算精度和良好的计算稳定性，还可较好地克服数值阻尼，但由于计及物理量的二阶导数项，计算工作量大，边界条件给定尚存在一定的困难；而拟协调单元模式不仅具有协调单元模式计算精度高的优点，还避免了物理量的二阶导数项，可大大地减少计算工作量。 - The formulation for the error analysis of acoustic radiation problem calculated by the boundary point method ( bpm ) is put forward ; the physical explanation of the boundary point analysis of the acoustic radiation problem is given ; the influence of the particular solution on the calculation stability of the bpm is studied ; the etthanced volume source boundary point method ( evsbpm ) is presented ; a test for the effectiveness of the evsbpm is carried out on the aspects of its calculation precision , calculation speed , calculation stability , adaptation to the geometric shape of vibrating body as well as its ability to overcome the non - uniqueness problem through various examples with different boundary shapes and different boundary value distributions
第三章导出了边界点方法分析振动声辐射问题的误差估计理论公式，揭示了边界点方法分析振动声辐射问题的物理本质；研究了特解场的局部特性对边界点方法的数值稳定性的影响；改进了现有的特解场构造方法，提出了改进体积源边界点方法；通过诸多不同边界曲面和不同边界量分布的声辐射算例，从计算精度、计算速度、计算稳定性、对振动体表面几何形状的适应性以及克服解的非唯一性等方面，对改进体积源边界点方法的有效性进行了考证。