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The simulation results demonstrate that an optimal reentry trajectory which satisfies the constraint conditions can be generated in 10 seconds and verifies the validity, robustness and feasibility of the algorithm.

仿真结果表明，这样处理只需10 s左右的时间便能产生一条满足约束条件的再入优化轨迹，验证了模型处理和算法的有效性、鲁棒性和可行性。

For the problem of an investor's position to be closed within a fixed period of time, there exists an optimal trade trajectory, which is decided by the investor's risk-aversion coefficient.

对于给定数量和限定期限的资产变现问题，投资者的风险偏好系数决定了其选择的交易路径是唯一的。

The optimal climbing trajectory is obtained by keeping the lift control at optimal lift-to-drag ratio.

爬升轨迹则是以控制变数维持在最佳升阻比状态下爬升。

Simulation results indicate that genetic algorithm can solve this problem and find the global optimal value efficiently ,and it's insensitive to the initial guess. The optimal reentry trajectory can meet the requirements of attitude, heat flux and velocity.

仿真结果表明提出的方法能够较快地搜索到全局最优解，对初始猜测值不敏感，能够方便用于RLV的再入轨迹方案选择和优化设计。

He probability of low altitude penetration can be highly improved by the TF/TA optimal trajectory planning.

F/TA最优轨迹规划技术可以在很大程度上提高突防飞行器的突防概率，是实现飞行器低空突防飞行的关键技术。

In this paper,it has studied the method of dealing with changing parameter.It is derived for the optimal flight trajectory calculation model from minimum theory.A simple calculation method is applied in calculating differential equations of two points boundary value question.

针对变参数的处理方法进行了研究，给出了计算时间最短水平机动运动的数学模型，并提出了一种简单适用的两点边值问题数值计算方法。

A parametric approach is proposed for the optimal trajectory tracking control problem of space rendezvous by using the eigenstructure assignment and the model reference method of linear systems.

基于线性系统的特征结构配置和模型参考方法，提出了一种空间最优交会轨迹跟踪控制的参数化方法。

Symmetric code ; genetic algorithms ; partial genetic inheritance ; robot optimal control ; trajectory planning

对称编码；基因算法；部分基因继承；机器人优化控制；路径规划

Keywords horizontal well;optimal design;trajectory control;technical measure;drilling fluid

超深水平井；优化设计；轨迹控制；技术措施；钻井液

For preventing the control system from system uncertainties and external perturbations the robust sliding mode controller is designed to guarantee the system to trace the optimal trajectory.

在实施非线性控制中，本文首次将δ算子及其在频域上对应的〓变换引入到汽车电子控制领域。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。