1) discretization lattice
离散格
1.
Heuristic algorithm for discretization lattice searching;
离散格的一种启发式搜索算法
2.
This paper reviews the concept of discretization lattice composed by discretization schemes,proposes the concept of ordered partition of universe U,and discusses a special kind of discretization schemes named closed discretization schemes.
给出对象域U的有序划分对应的闭离散化方案获取算法CDA,分析闭离散化方案与对象域U的有序划分之间的关系,证明了闭离散化方案在离散格到划分格的映射f下能保持交并运算。
2) discretization scheme
离散格式
1.
To study the influence of discretization schemes on the simulation results,the Second Order Upwind scheme,the QUICK scheme and the MUSCL scheme were applied to the numerical simulation of swirling turbulent flow outside the horizontal drilling nozzle.
针对石油工业中径向水平井钻进技术的需要,采用RNGk-ε模型,应用二阶上风格式、QUICK格式和MUSCL格式对带有螺旋导叶的径向水平井锥形喷嘴外湍流旋流流动进行了模拟研究,以此来评价离散格式对湍流旋流流动数值模拟结果的影响。
2.
The discretization scheme given by Perona and Malik is the approximation of the Perona-Malik Model.
Perona和Malik给出的离散格式是原Perona-Malik模型的近似模型的离散形式。
3.
The outflow fields of a simplified fastback car were studied with numerical methods of different turbulence models and diflerent discretization schemes with the CFD code STARCD.
以简化的直背式轿车模型为研究对象,以商用计算流体力学软件STAR-CD为工具,应用不同的湍流模型和离散格式对轿车外流场进行了数值模拟,通过与试验结果的对比,研究了湍流模型和离散格式对直背式轿车外流场数值计算精度的影响,同时对SIMPLE算法及其两种修正方法PISO和SIMPISO算法的计算精度进行了比较。
3) discrete grid
离散网格
1.
In recent years,a number of data structures for global geo-referenced data sets have been proposed based on regular,multi-resolution partitions of polyhedra and spherical discrete grid is the most promising of such systems.
球面离散网格模型是管理海量数据的有效途径,如何构建球面网格是这类模型的基础问题。
4) discretization schemes
离散格式
1.
The results show that all sorts of spatial discretization schemes have a good discrimination of shock wave,however.
通过模拟双锥外形高超音速绕流,对各种计算流体力学空间离散格式的性能进行分析。
5) discrete schemes
离散格式
1.
Influence of discrete schemes on accuracy of radiative heat transfer by the finite volume method;
离散格式对辐射换热有限体积法精度的影响
2.
From comprehensive viewpoints of computational mathematics,physics mechanism and computational experiences,the evaluation and review have been made on some valuable discrete schemes for practical engineering to draw valuable hints to light future CFD study.
从计算数学、物理力学分析和计算经验相结合的观点分析一些对于工程计算有价值的离散格式,梳理出脉络,从改进和创新的观点评述了当代计算流体力学的若干问题。
6) discrete scheme
离散格式
1.
Symmetry of discrete schemes for 2-D transport equation;
二维输运方程离散格式的对称性
2.
Firstly, the "symmetry" property of the two-dimensional discrete schemes and the prior estimates of the three-dimensional discrete solutions have been studied in theory.
针对高维中子输运方程的数值模拟,基于在应用中提出的问题和未来发展的需求,本文研究了二维离散格式的“对称性”问题,并对三维差分方程作了离散解的先验估计以及并行和加速收敛算法的设计、应用,得到了若干具有理论和实际意义的成果。
3.
Section two gives the notations , lemmas and discrete schemes of the system of parabolic equations.
第二节给出所研究的具有初边值条件的一维抛物型方程组及其离散格式。
补充资料:离散时间周期序列的离散傅里叶级数表示
(1)
式中χ((n))N为一离散时间周期序列,其周期为N点,即
式中r为任意整数。X((k))N为频域周期序列,其周期亦为N点,即X(k)=X(k+lN),式中l为任意整数。
从式(1)可导出已知X((k))N求χ((n))N的关系
(2)
式(1)和式(2)称为离散傅里叶级数对。
当离散时间周期序列整体向左移位m时,移位后的序列为χ((n+m))N,如果χ((n))N的离散傅里叶级数(DFS)表示为,则χ((n+m))N的DFS表示为
式中χ((n))N为一离散时间周期序列,其周期为N点,即
式中r为任意整数。X((k))N为频域周期序列,其周期亦为N点,即X(k)=X(k+lN),式中l为任意整数。
从式(1)可导出已知X((k))N求χ((n))N的关系
(2)
式(1)和式(2)称为离散傅里叶级数对。
当离散时间周期序列整体向左移位m时,移位后的序列为χ((n+m))N,如果χ((n))N的离散傅里叶级数(DFS)表示为,则χ((n+m))N的DFS表示为
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参考词条