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马赫数
流体力学中表征流体可压缩程度的一个重要的无量纲参数,记为,定义为流场中某点的速度同该点的当地声速之比,即,它是以奥地利科学家E.马赫的姓氏命名。
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party newspaper system
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parvocellular part
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Parzen window
Parzen window method
Parzen窗方法
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