噪声载荷是一种高频、宽带随机载荷，在低循环疲劳寿命预测中被广泛采用的时域计数法很难直接利用。
Sonic loading is a high frequency, broadband random process. Basic cycle counting methods, which are prevalently used in time domain, are difficult to be applied.
测量断面的平均计数、噪声、冷区对比度及剖面曲线。
The mean counts, noise, contrast and profile curves of the slices were measured.
二者的区别在于显微光子计数成像系统是噪声受限系统。
The difference of two systems is that the microscopic photon counting image system is a noise limited system.
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