最优策略

To overcome the premature of simple genetic algorithm, the calculating efficiency of SGA is improved by the following two ways; Firstly, in order to ensure convergence of algorithm and reduce influence factor of convergence, elitist selection and adapted crossover and mutation operator are adopted. Secondly, because this study deals with finding minimize volume of structure, to quicken convergence of this problem, in line with mechanics criterion the paper carry out mutation to some genes in chromosome according to variations of internal force. This will let algorithms to search answer with our hoping directions.

针对基本遗传算法存在早熟的问题，本文主要从两个方面进行了改进，首先为了保证算法的收敛和减少影响算法收敛因素，采用了最优保护策略和自适应的交叉和变异算子；其次，由于本文研究内容涉及求结构最小体积问题，为了加快此类问题的收敛速度，本文结合结构优化中的力学准则，对个体染色体中的某一段基因按照内力变化进行变异操作，使得算法按一定方向进行搜索最优解。

We analyze especially the equilibrium rules of optimal strategy and its conditions and make a comparative static analysis to the influence of parameters to optimal thresholds after educing investment value function and optimal investment threshold.

在导出企业投资价值函数和最优投资临界值的基础上，着重分析了企业最优投资策略均衡规则及各均衡存在的条件，并就各参数对企业最优投资临界值的影响进行比较静态分析，得出了一些有意义的结论，同时给出了经济解释。

Based on the principle of optimality,the search problem is then transformed to an equivalent problem of deterministic distributed parameters system,represented by a second order PDE.

采用分析的方法来研究随机运动目标的最优搜索问题，并将原问题转化为由一个二阶偏微分方程所表示的确定性分布参数系统的等价问题，推导出随机运动目标的最优搜索问题的HJB方程，并证明了该方程的解即是所寻求的最优搜索策略。

In this paper,an optimum trajectory from perilune to lunar surface is derived in terms of Pontryagin's maximum principle,which is an open-loop way.Then,an optimal nonlinear control law based on an fuzzy neural network is presented,on the basis of the optimum trajectory,due to the nonlinear mapping function of the fuzzy neural network,which is a closed-loop way.

本文根据终端着陆条件和性能指标，以由Pontryagin's极大值原理得出从近月点到月球表面的最优着陆轨迹为基础，给出一种基于模糊神经网络的非线性最优控制策略，使被控系统能够通过模糊神经网络的非线性映射能力实现某种最优的闭环制导控制。

Basically,an optimal nonlinear control law based on an artificial neural network is presented,on the basis of the optimum trajectory from perilune to lunar surface in terms of Pontryagin's maximum principle according to the terminal boundary conditions and performance index.

其主要内容是，根据终端着陆条件和性能指标，以由庞氏极大值原理得出从近月点到月面的最优着陆轨迹为基础，给出一种基于人工神经元网络的非线性最优控制策略，使被控系统能通过神经网络对非线性的映射能力实现某种最优的非线性控制。

This paper concerns the problem of how to purchase the reinsurance in order to make the insurer and the reinsurer's total risk least under the standard deviation calculation principle.

本文在标准差保费计算原理下，同时从原保险人与再保险人双方的角度出发，考虑能使得双方风险波动达到最小的再保险策略，并且得出使得再保险双方的共同风险达到最小的最优再保险策略。

By combinatory counting process to enumerate data of work condition of each generators, thus makes sure the searching and solver in optimal condition.3. Set up the power equilibrium equation and flow equilibrium equation according to the slack variable. It is not necessary to adjust the optimization any more and guarantee the optimal precision of the solution.4. Digitalize the composite characteristic curve, such as the digital input and accurate extraction of data during the performing.The above mentioned is an expanding for optimal performing of hydropower station in theory. It has good engineering applicability.

在水轮机专业领域和水电站运行领域主要成果是：(1)用人工智能的方法解决了水电站机组间负荷动态最优调度问题，且用数学方法严格证明了解的最优性；(2)用组合计数对并联机组的每个组合工况进行无遗漏枚举，从而保证搜索策略的作用范围和解的最优性；(3)利用松弛变量建立了功率平衡方程和流量平衡方程，使优化结果不再需要二次调节，保证了解的优化精度；(4)综合特性曲线的数字化，包括曲线的数字化输入和在程序运行过程中对曲线信息的精确提取。

Taking the overconfidence as an important cognitive bias into the consideration of classical optimal consumption and investment problem,an optimal consumption and investment model is set up with incomplete information.Then,an optimal consumption and investment strategy is given by use of stochastic dynamic programming theory.

将行为金融理论中过度自信这一重要的认知偏差纳入经典的最优消费投资问题中考虑，建立了部分信息下的最优消费投资决策模型，并运用随机动态规划原理得到了最优消费投资策略。

The optimal control problem was formulated as an undiscounted semi Markov decision process that maximizes the system throughput. Numerical examples of an actual FMS are presented, showing the optimal work routing policies when the system is reconfigured into two different config...

该系统最优控制问题被规划为无限期间系统平均输出为最大的准马尔科夫决策过程，并以实际的柔性制造系统为例，通过计算，给出系统重组后不同构成时的最优工件运送策略，使系统在运行过程中可获得最佳性能。

The algorithm firstly uses some robust techniques to construct an inliers set of matching points. Then it takes the epipolar distance as the optimal criterion and search optimal subset in the inliers set under the greedy strategy. Finally, the fundamental matrix is calculated with the optimal subset.

利用各种鲁棒技术获得内点集，以点到极线的距离作为最优量度标准，采用贪心策略在内点集中寻找最优子集，并利用最优子集来计算基本矩阵。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。