The second theorem defines the Equivalent Magnetic Charge and the Moment of Current Density.

第二个定理定义了“等效磁荷”与‘电流密度矩’。

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In chapter two, wave motion equation, sound energy, sound energy flux density, sound intensity and its scaling method and the theorem of two-microphone sound intensity have been introduced.

第二章介绍波动方程、声能、声能流密度、声强及度量方法、双传声器互谱声强测量原理。

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With new Central Limit Theorem, convert the uniform random number's probability density using probability density Converter, then add all generated random Numbers.

对于改进型中心极限定理法，用概率密度转换器对均匀分布的随机数做密度转换，然后再累加产生正态分布的随机数。

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