zero detection中文什么意思

例句与用法

1. the cross-zero detection of wavelet transform could detect the gradation image sudden change information, at the same time it could be express the characteristic information the original map ( namely image function plants " jump point " )
   小波过零检测可以很好的检测到灰度图像的突变信息,同时可以很好的表示出原图像灰度跳变(即图像函数种的“拐点”)的特征信息。
2. based on mono-pulse radar system and the analysis of terrain echoes, a geometrical model of air to ground ranging is constituted . by using the signals received from the sum and difference channels of terrain follow radar, a group of the expressions for terrain echoes are educed and characteristics of these echoes are obtained . according to the characteristics of the echoes, the theory and method of pass zero detection of difference channel and its applications are discussed in detail
   针对一维单脉冲雷达体制，分析了地形目标回波特性；建立了地形跟随雷达空地测距的几何关系；利用雷达收发信号，导出了地形跟随雷达和差接收通道的回波信号表达式，进行了波形仿真，得到了地形跟随雷达的地面散射产生回波在时域中的特性；根据和差回波特性，阐述了差信号过零点检测测距的原理和方法及工程实践中的应用，并给出了真实雷达对外辐射试验的结果，验证了文中的仿真。
3. in this paper, the real-time detecting method for harmonic current need only that the constructed voltage system be in step with the real voltage system ( which can be obtained by cross-zero detection to voltage waveform ), meanwhile, we have testified in concerned chapter that the phase is not important for the constructed voltage system
   本文所提出的谐波电流实时检测方法，其前提只是要求构造系统与原有电压系统同步(这可以通过对电压波形的过零检测来实现)，而对于构造系统的相位却没有严格的要求，本文并在相应位置给予了其证明。