The features of shock wave can be analyzed qualitatively in the velocity plane for a special perturbed gravitation which is used to simulate the self-gravitation of interstellar gas.
对一种特定的扰动引力场模拟气体自引力，可以在速度平面上定性分析激波解的特性。
The system error and random error are analyzed and the experimental results which prove the system has the merits of self-operated measuring, timesaving run duration, high precision are given.
对测量系统进行的误差分析及试验结果证明整个测量装置具有可自动测量、测量时间短和测量精度高的优点。
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