computational efficiency meaning in English
计算效率
Examples
- But the former is nonlinear combining optimal problem and the latter is nonlinear planning optimal problem . so it ' s prone to result in " combination exploration " and lower computational efficiency simply combining the above two means to carry on the coordination optimism of distribution network ' s reactive power
但一个是非线性组合优化问题，一个是非线性规划优化问题，因此用传统方法将这两者结合进行配电网络无功综合优化，容易产生“组合爆炸” ，而且计算效率低。 - Abstract : in this paper , we propose an improved lagrangian relaxation algorithm to solve job - shop scheduling problems . besides the addition of augmented objective , we expand the search scope of near - optimal solutions and improve the computational efficiency greatly by restricting the solution scope of sub - problems and modifying the search method of dual problem . at the same time , we develop a genetic algorithm combining with the lr ( lagrangian relaxation ) method . using the numerous useful solutions we get in the lagrangian relaxation as the original genes , we can improve the solution further . test results show that these methods achieve satisfied outcome for job - shop problems . they can also be applyed to other programming problems with constraints
文摘:针对车间调度问题，提出了一种改进的拉氏松弛算法.在增加辅助目标函数的基础上，通过对子问题的限制和搜索策略的改变，使拉氏算法的计算量减少，近优解的搜索能力有很大改善.本文还提出了一种基因优化算法，充分利用拉氏算法得到的多个近优解，进一步优化结果.仿真结果表明对车间调度问题得到了较好的结果.本方法也可用于其它有约束的规划问题 - The explicit method is widely used for its simpleness and little memory consumed with local time step and variable coefficients implicit residual smooth to accelerate the convergence procedure . according to yoon and jameson ' s ideas , an efficient implicit lu - sgs algorithm is carefully constructed by combing the advantages of lu factorization and symmetric - gauss - seidel technique in such a way to make use the l and u operators scalar diagonal matrices , thus the numeric algorithm requires only scalar inversion . the computational efficiency is greatly improved with this scheme
显式方法具有简单，消耗内存小等优点，并采用当地时间步长、变系数隐式残值光顺等加速收敛措施，在定常流动的模拟中得到了广泛的应用;根据yoon和jameson提出的简化正、负矩阵分裂，构造的l 、 u算子只需进行标量对角阵求逆，极大提高了流场数值求解过程的计算效率;采用newton类型的伪时间子迭代技术使时间推进精度提高至二阶。 - Through the research in this thesis , following conclusion can be drew : on the condition of nearly incompressible limit , the n - s equations can be recovered by the lb method ' s models with 2 - order numerical precision ; computational efficiency in simulating flow fields can be improved effectively by perfection of the lb method ' s theory ; development of parallel computation can contribute to the simulation of large - scale flow field with complex geometry
通过本文的研究，可得出如下结论： lb方法的模型在接近不可压缩的条件下能够以二阶精度逼近n - s方程； lb方法理论的完善能够有效地提高流场模拟的计算效率；并行计算的发展有利于lb方法模拟大尺度的复杂流场。 - This method is proved to be an accurate solution of random vibration equation , in which all cross - correlation items , either between earthquake inputs or between participant modes are involved naturally . compared to conventional method , the computational efficiency of the developed method is much higher
此法计算结果自动包含了振型间及各输入分量间的相关项，理论上是随机振动方程的精确解法，且与传统方法相比可大大减少计算量，非常适合分析大型网壳这种自振频率密集结构的随机地震响应。