When optimizing synchro update of the quaternion, the quaternion differential equation is calculated by using minimum parametric method.

采用最小参数法求解四元数微分方程，优化了四元数实时更新算法。

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Based on the minimum potential theory of energy method, adopting Eular equation, the governing differential equations of curved beam were established.

基于能量法中的最小势能原理，结合欧拉方程建立了构件变形后的中性平衡微分方程。

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Using this method, minimum pollutant gas concentration formula is got by differential absorption lidar and Raman lidar, their comparison with ones in some literatures is made and shortage in...

把此方法应用到激光雷达中来，得出了差分吸收激光雷达和拉曼雷达探测污染气体最小浓度估算公式，并把它们与已有的估算公式进行了比较，指出了原有估算公式的不足。

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