The relations between spectrum densities of system output responses and frequency were obtained by assuming input functions to be ergodic and stable stochastic processes.
假设输入函数为各态历经的平稳随机过程，得出各输出响应的谱密度与频率的关系。
Saddlepoint approximations are powerful tools for obtaining accurate expressions for densities and distribution functions.
鞍点逼近法是一个非常有效的逼近工具，它可以获得密度函数和分布函数的逼近函数。
The single particle level densities, calculated with the local density approximation and Fermi gas model respectively, are used to obtain the partition functions.
利用费米气体模型和区域密度近似分别计算单粒子能级密度，通过单粒子能级密度求得中等质量碎片（IMF）的内部配分函数。
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