考查了线性组合方程的解在特征角面顶点的值，并给出了柯西问题解对初值的必要条件。
The value of solution for the linear equation at the conic point is derived, and the necessary condition satisfied by the Cauchy's problem solution is given.
在此基础上，运用地层基准面原理，建立扶杨油层的等时地层格架，研究其河流-三角洲层序发育特征及其演化过程。
Based on these, the isochronal stratigraphic framework of Fuyang reservoir is established, and the fluvial-delta sequence feature and evolution process are studied in this paper.
当物体离壁面很近时，出现排斥现象，水动力系数随攻角的变化呈非线性特征。
While for small clearance, there appear repulsion phenomena, and the variation of coefficients with attack Angle is nonlinear.
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