At paraxial approximation the maximum of the matching function is increasing with increased divergence Angle. For different brightness of pumping light, the optimum value of the Angle is obtained.
发现在旁轴近似下，匹配函数的最大值随泵浦光发散角的增大而增大，在考虑到像散的影响后，得到泵浦光发散角的参考值。
This program can be treated as an optimum program, that is to find the optimum value of a cost function.
基元抽取问题可以归结为优化问题，即寻找代价函数的全局最小值。
Control variables, production of various products, are optimized to gain the optimum value of objective function, that is maximizing profit or minimizing cost in a refinery.
为使目标函数即炼厂的利润最大或是成本最小，对控制变量为各产品的产量进行优化生产。
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