优策略

The result presents that auction stage holds optimal WDP for the procurer. The suppliers also have incentive compatible bidding strategies.

基本结论是，拍卖阶段存在最优获胜者确定方案和相应的激励相容投标策略。

To the condition of deviation from side path when vehicles are turning and braking, according to the deviation distance, the control strategies and control algorithms of vehicle braking stability by two control methods, yaw moment and active steering, are determined. The fuzzy controller are designed whose outputs can be adjusted online according to the variation of slip rate and dynamic proportionality factor. The simulation results prove that the method of fuzzy control which is based on the yaw meoment and front wheel active steering can improve vehicle braking stability and ability of path tracking.

针对汽车在转弯制动时出现的侧向路径偏离状况，根据偏离量大小，利用横摆力矩和主动转向两种控制模式分别进行汽车制动稳定性控制，确立了两种控制模式下的控制策略和控制算法，设计了模糊控制器，根据轮胎最优滑移率变化状况，对模糊输出变量论域的大小按照动态比例系数进行实时在线调整，仿真实验验证了所提出的基于横摆力矩和前轮主动转向的模糊控制方法能提高汽车制动稳定性和路径跟踪能力。

In chapter five, combined with the queuing theory and Markov process, the supply chain stochastic model is established, and the steady balanceable distribution is solved. The supply chain items are given and the different parameters'impact to these items and whole cost are analyzed. The optimal inventory control strategy is given at last.

第五章将排队论、马尔可夫过程与供应链模型相结合，建立了供应链随机库存模型，求解了平稳分布，给出了供应链指标，并分析了不同参数对指标和整体成本的影响，提出了最优的库存控制策略。

Here we study the optimal proportional reinsurance and dividend pay out of an insurance company.

本文将讨论保险公司的最优再保险和分红策略。

For the optimal quantities, we study the impact of the parameters, such as the per unit purchase cost, the per unit sales price, the per unit salvage value, and the variation of demands, and get

最后，我们通过大量的算例对最优采购量的基本性质和比较分析的结论进行验证，并分析各参数对采用替代策略效果的影响。

Five ways on comparing covariance matrix are applied to the Shanghai 50 Indexes Stock Exchange, which are sample covariance matrix, scalar matrix, two-parameter covariance matrix, single index matrix, constant correlation matrix. We adopt principal components method and Markowitz portfolio method to measure stock market risk using VaR, getting the effect of measuring market risk. The result shows that sample covariance matrix and two-parameter covariance matrix could measure market risk more effectively.

本文以上证50指数数据为样本，采用样本协方差矩阵、数量矩阵、两参数模型矩阵、单指数模型矩阵、常量相关矩阵作为与股票相关的协方差矩阵，结合投资策略选择的主成分方法和Markowitz最优投资组合方法，计算VaR以度量市场风险，并比较了五种协方差矩阵度量市场风险的效果，结果表明，在主成分方法中，样本协方差矩阵和两参数矩阵方法能有效的度量市场风险。

The results exhibit three-fund separation theorem which include the riskless asset, revised market portfolio and benchmark portfolio.

结果表明：最优投资策略由无风险资产，修正的市场组合及"基准组合"构成，可视为三基金定理。

The core of optimized DFD strategy is coefficient matrix which is calculated by complex- shape method in optimization theory.

使用约束优化方法中的复合形法计算得到系数矩阵，作为最优驱动力分配控制策略的核心。

The optimal harvesting policy of the single specie was studied with age distribution when two stages were harvested respectively.

利用最优捕获策略的理论，研究一个具有年龄结构的单种群模型，获得了其幼年种群和成年种群捕获的优化理论。

In this paper the stochastic dynamic programming is used to derive the optimal task control strategy of the automata, and a simulation method and some programs are proposed to simulate the running of the KMC.

采用随机动态规划的方法求取自动机的最优控制策略，并给出知识化制造单元运行的仿真方法和程序。

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％。