基于随机振动的离散分析理论，推导出白噪声激励下结构动力响应的递推公式。
Based on discrete random vibration theory, recurrence formulas are developed to calculate the dynamic response of structures under white noise excitations.
设计主要有两个部分的内容：液压轴向柱塞泵的噪声分析和结构的改进。
The content of paper includes two parts: the noise analysis of hydraulic axial piston pump and improved design of structure.
通过对混频器噪声机理的分析，在原有的结构上增加了电流注入模块。
A double-balanced Gilbert structure with current injection is used according to the analysis of mixer noise and gain.
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