The theories of the sample integral and the cross - mutuality for the sinusoidal signal phase difference estimation are analyzed, and the digital simulation experiment is carried out.
对正弦信号相位差估计的取样积分和互相关两种方法的理论进行了分析，并进行了数字仿真实验。
The equipment used to test valve's lagging is designed, and piezo-pump with integral valves as sample is tested.
设计了阀振动滞后性测试装置，以整体开启阀压电泵为模型作了测试。
The Radon transform of the projection is calculated in the filtered process of exact reconstruction, Siddon and Simpson integral are used to sample the pixels to get the projection.
在精确重建滤波过程中，需要计算投影数据的雷当变换，本文采用普通累加法和辛普森直线积分法来完成对象素网格的采样。
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