It is well known that the maximum principle is an important approach to study optimal control problems.
众所周知，最大值原理是研究最优控制问题的一个重要方法。
The optimal control problems for the stationary river wave model are analyzed.
研究平稳静态河道水波模型的最优控制问题。
Up to now the singular optimal control problems in the thrust synergetic orbital transfer have not been completely solved.
特别是由推力协同变轨所导致的奇异最优控制问题到目前尚没有完全解决。
Finally in the third part, we study the optimal control problems for the variational inequality with delays in the highest order spatial derivatives.
第三部分讨论最高阶偏导数项具有时滞的变分不等式的最优控制问题。
Some of the optimal control problems can be solved more quickly and efficiently with the algorithm if only the control variable's values at the knots are given.
通过仅假设出节点处的控制变量值，使该算法在求解最优控制问题时更方便，收敛更快。
As numerical examples we treat state constrained optimal control problems for elliptic differential equations. We also compare the established results with existing methods.
以其作数值例子，我们处理椭圆微分方程中的状态约束最优控制问题，并对既定结果与现行方法进比较。
The study results show that some constrained optimal control problems can be solved efficiently with the improved algorithm, including some singular optimal control problems.
结果表明，改进算法能较好地求解一类受约束最优控制问题，对奇异最优控制问题也能较好求解。
The paper also sets up a classification of time-optimal control problems of general linear time-invariant systems, and discusses the possible methods of solving the problems.
文末，对一般线性定常系统的时间最优控制问题进行了分类，并讨论了求解方法。
The optimization methods for launch trajectory of low earth orbit are discussed, and the optimal control problems are converted into parameter optimization problems by multiple parameterized methods.
确定了近地轨道的发射轨道优化设计方法 ，采用多重参数化法将轨迹最优控制问题转化为参数优化问题。
The optimization methods for launch trajectory of low earth orbit are discussed, and the optimal control problems are converted into parameter optimization problems by multiple parameterized methods.
确定了近地轨道的发射轨道优化设计方法 ，采用多重参数化法将轨迹最优控制问题转化为参数优化问题。
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