本文考虑到二阶非线性项，建立起更加精密的系统模型，推导出利用状态变分计算终端干扰偏差的公式。
In this paper we consider second order nonlinear terms, set up more precise dynamic system's model and derive the computation formula of terminal perturbation deviation by state variation.
内蒙古黄河流域水土保持工程水文设计模型把水土保持工程设计中水文计算复杂繁琐的过程变的十分简捷。
The hydrologic frequency design model made the complex hydrologic computation easier in the design of soil and water conservation works in Inner Mongolian Yellow River watershed.
本文从大气的运动方程出发，利用实测的台风气压场资料和变分调整的方法，计算了进入渤海的台风风场，模拟了台风的不对称结构。
Starting from the motion equations and accepting the technique of numerical variational adjustment, this paper sets up a new model to calculate the typhoon wind field in the Bohai Sea.
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