我亲眼目睹有人发布有关微积分和三角法的恒等式难题，并迅速得到别人的解答。
I've seen people post Calculus and Trigonometry equations and get them solved fairly quickly!
在组合模型的权重系数求解中，首先对目标函数和等式约束使用拉格朗日乘子法来求解权重系数。
To calculate the weight coefficients of the combination model firstly the Lagrangian multiplier method is applied to object function and equality constrains.
平差参数间存在等式约束的情形下，一般采用广义逆法。
If adjustment parameters are in equality constraint, generalized inversion method will be adopted.
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