为了解决具有异形内轮廓的冲压件翻边工序中易产生裂纹等缺陷，分析了异形内轮廓翻边成形时周向应变分散效应。
In order to solve the lack of flaw when flanging the part with freeform internal profile, the circumferential strain dispersion effect has been analyzed in flanging the profile.
由于单周控制单元中的积分器需采用模拟电路实现，模拟电路积分时间常数易受电路参数的变化而变化。
But one cycle controller is usually realized by analog circuit and the parameter is easy to vary with the environment, so the integration time constant will vary at the same time.
周在 密苏里州 的圣露易斯 的华盛顿医科大学中组织了一个小组以老鼠为原料进行研究。
A team led by Zhou Fang Chen at Washington University School of Medicine in Saint Louis Missouri made the discovery in mice.
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