Two solving methods are deduced using Laplace transform: the direct solving method and the state-space method.
运用拉普拉斯变换推导出其两种求解方法：直接求解法和状态空间法。
The definition of the Segmental Linear Functions and some operational properties are given. By means of the properties, a new numerical method for direct solving variational problems is obtained.
给出了分段线性函数族的定义和有关的运算性质，利用这些性质得到直接求解变分问题的一种新的数值方法。
The direct shooting method solving finite thrust trajectory optimization is studied.
研究了求解有限推力轨迹优化问题的直接打靶方法。
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