velocity of entry

First, proper way of GPS positioning are selected according to the high dynamic flight characters of re-entry spacecrafts, such as high distance from the earth, high velocity and far awy from the launching point.

本文首先根据再入航天器飞行高度高、速度快、飞行距离远等特点，对GPS定位方式进行选择。

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The velocity distributing, variation of extension rate, shear rate and the natural convergence angle of the fluid were analyzed under different initial entry pressure.

分析了在不同口模压力（P）下入口区速度分布、延伸应变速率、剪切应变速率以及流体自然收敛角的变化。

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At the same time, gate entry velocity and gate dimension have great influence on the mold filling process, and high quality metal castings could be obtained through proper setting of these parameters.

同时，内浇道充型速度和内浇道尺寸对压铸件充填过程影响很大，合理的设置可以减少涡流和卷气，得到高质量的压铸件。

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Numerical simulation for flue gas velocity field at the entry section of SCR reaction tower

SCR反应塔入口段烟气速度场的数值模拟

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By analyzing the simulated results we can conclude that temperature logging can distinguish water entry zones from non-water entry zones through hot-water injection for short periods of time, enlarging water injection velocity, selecting reasonable shut-in time.

并对模拟的结果进行分析，从中可以得出：短期热注、提高注水速率、选择合适的关井时间等可以提高温度测井对注入剖面的识别能力；

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