Development Outlook of Numerical Calculation of Muzzle Flowfield and Prospect Search 膛口流场数值计算的发展概况和展望
The numerical experiment shows that the algorithm is better than the traditional pattern search method in the aspect of calculating quantity. 通过数值实验与传统模矢法相比,计算量明显减少。
Further, the main directions between two tooth surfaces on every edge contact point, that is, the possible contact point pairs, are found by a numerical search method. 又通过齿面搜索确定了两齿面间的相对主曲率方向,即载荷下的可能接触方向和可能接触点;
Continuous Hopfield neural network is different from the traditional optimum calculation algorithm and the numerical iterative search algorithm. It provides a more efficient method to implement the optimum algorithm. 连续型Hopfield神经网络不同于传统优化计算和数值迭代搜索算法的基本思想,它为快速实现优化算法提供了新的途径。
Numerical examples illustrate that the present method possesses both good capability to search global optima and rigid convergence speed in comparison with that of the chaos optimization method. 算例表明,当混沌搜索的次数达到一定数量时,混合优化方法可以保证算法收敛到全局最优解,且计算效率比混沌优化方法有很大提高。
After detailed discussion on the rationale and procedure of the MLE approach, an efficient numerical wind vector search algorithm is presented in this paper, according to the general distribution of objective function. 该文对最大似然估计的风场反演方法的基本原理和具体过程进行探讨,根据其目标函数的一般分布特征,提出一种较为高效的数值风矢量搜索算法。
Numerical simulations show that the search variables should be selected as less as possible in virtue of a priori information on the antenna under test and near-field measurements. 数值模拟表明,应利用有关天线和近场测量的先验信息,选取尽量少的搜索变量。
Numerical results show that the new algorithm is really superior to the determinant search method. 数值结果表明,新算法的确比行列式查找法优越。
Some details in numerical experiment are also presented, such as how to carry out one dimension search, how to set some initial values and how to adjust homotopy parameter. 介绍了在数值试验中一些细节处理,包括如何进行一维搜索,在试验中一些初值的设定,以及同伦参数的调节问题。
Given multiple restrictions of workspace, the shape and volume of workspace are gained through method of boundary numerical search. 在分析了影响并联机器人工作空间的约束前提下,通过边界数值搜索的方法,得到了工作空间的形状及其大小。
For the convenience of explaining the advantage of genetic algorithm, we compared the results of numerical optimization and traveling salesman using genetic algorithm with the ones using local search strategy and simulated annealing. 为了便于说明遗传算法的优越性,分别将对数值优化和旅行商问题的计算结果与用局域搜索法和模拟退火得出的优化结果进行比较。
By using its numerical value search mechanism, the opti-mum solution can be obtained without the derivative calculation of goal function. 该方法无需求解目标函数的导数,利用数值搜索优化机制,可较好地获得最优解。
Numerical Solution of Direct Kinematic Problems for Parallel Manipulators Based on Interval Dividing Search Algorithms 基于区间对分搜索法的并联机构位置正解问题求解
The numerical experimental results show that NSGA-II with the neighborhood search can outperform NSGA-II applied to multi-objective 0-1 knapsack problems. 数值实验表明,引入邻域搜索机制的NSGA-II算法在求解多目标0-1背包问题时表现出更好的性能。
The illustrative numerical example shows that the fuzzy optimum design of structures using the Bound Search Method is very convenient and is also beneficial for saving materials. 实例计算表明,使用限界搜索法进行结构模糊优化设计非常简便,且能获得节省材料的效益。
Since the numerical derivative represents the search direction of optimization process, it's the key information for optimization. 而在优化计算过程中,导数是至关重要的信息,因为它代表了寻优过程的搜索方向。
Without any exhaustive numerical search, the ERQ can increase the spectral efficiency with the optimal continuous rate and power adaptation. 不需要大量计算,ERQ可以通过最佳连续码率和功率适应提高频谱效率。
Numerical simulation is conducted through analysis of the influences of the times of coarse search, the length of chaotic time series and the initial value of conductivity on the convergence of the algorithm. 就混沌序列长度、粗搜索次数和待估导水系数初值取值范围等因素对算法收敛性的影响,进行了数值实验。
Comparison of Numerical Optimization Performance between Genetic Algorithm and Local Search Strategy 遗传算法与局域搜索法对数值优化性能之比较
Several classical test functions are carried on the two improved algorithms. Theoretical analysis and numerical experiments indicate that the algorithms keep a good diversity throughout the search, have a good searching ability in various multiple hump functions, and are less dependent as well. 使用经典的测试函数对两种算法进行实验测试,数值实验表明,算法很好地维持了种群多样性,对问题的依赖性较弱,对于各类多峰函数具有较强的搜索能力。
The comparison between the 2-order perturbation solutions and numerical optimum solutions by gradient search are demonstrated too, which prove that the 2-order perturbation solutions are stable enough. 2. 本研究还比较了二阶摄动解与梯度寻优得到的数值最优解之间的差别,证明二阶摄动解具有较高的稳定性。
In the ordinary circumstances, we first draw support from two numerical methods, namely hybrid intelligent algorithm or finite search method to obtain a series of study samples, then carries on again through the artificial neural networks approaches superiorly, obtains optimal control of the system. 一般情况下,我们先是借助两种数值方法,即混合智能算法或有限搜索的办法得到一系列学习样本,然后再通过人工神经网络进行最优逼近,以获得系统最优控制。
Cipher text data in the inquiries, the character data using two-phase query algorithm; numerical data for the B~+ tree-based query algorithm, and compared to the traditional search algorithms, both to improve the efficiency of search algorithms have improved. 在密文数据的查询方面,对于字符型数据采用两阶段查询算法;对于数值型数据采用基于B~+树的查询算法,与传统的查询算法相比,以上两种改进的查询算法的效率都有所提高。
Preliminary numerical results show that the proposed method with weak Wolfe line search is very promising. 数值实验结果表明该公式与弱Wolfe线搜索结合所得的算法非常具有潜力。
Numerical experiments show that the differential evolution with this strategy can balance well between the global search and the faster convergence. ( 4) A fit parameter setting usually improves greatly the performance of differential evolution. 数值试验表明基于该策略的差分进化算法能很好平衡全局搜索和加速收敛之间的矛盾。(4)合适的参数赋值常会大大改善差分进化算法的求解性能,但是如何赋值并非易事。
The numerical experiments show that all these operations improve the local search ability and the optimization speed. 数值实验表明这些操作确实提高了算法的局部搜索能力和寻优速度。
Performance of the three algorithms is evaluate and compared with each other by simulation tests. The results of numerical experiment show that Scatter Search Algorithm charactered by evolution search has good performance and is more suitable for solving such kind of optimization problems. 4. 论文通过数值实验对各种算法的优化性能进行评估和比较,实验数据表明,具有进化搜索特性的伞布搜索算法对问题具有良好的优化效果,适用于该类优化问题的求解。
Numerical results show that two dimensional search algorithm is feasible and effectiveness. 数值试验结果表明,子空间搜索算法是可行有效的。