Zero crossing
交零───Zero crossing
Traditionally, the method of bar code recognition is based on zero crossing of the second derivative.───传统的条码识别方法是通过二阶导数零交叉来定位条码边界.
Advanced compound switching technology can realize zero - crossing switching and ensure no inrush current during switching.───先进的复合开关技术,实现过零投切,保障投切过程无涌流.
Then by considering the factors of time gate, energy, phase and zero crossing point, etc.───在此基础上,综合考虑时窗 、 相位 、 能量和过零点等多种因素,成功地切除了初至波.
Abstract: Zero - crossing edge detection method was analyzed.───文摘: 讨论二阶导数过零边缘检测方法.
The design is more robust to noise interference compared with that using the zero crossing method.───与采用过零检测方案的数字接收机相比,本设计具有更强的抗干扰能力.
Short - time average energy, short - time average zero - crossing rate and short - time energy - zero - product are introduced.───介绍了 短时 平均能量法 、 短时 平均过零率法和 短时 能零积法三种语音端点检测法.
Zero - crossing detecting approach is used to detect the phasor of generators.───我们采用了过零检测来测量发电机的功角.
A zero - crossing derivative spectrophotometry method is established for the determination of ofloxacin in ofloxacin glucose injection.───用零交导数分光光度法测定氧氟沙星葡萄糖注射液中氧氟沙星的含量.
Furthermore, the control units have zero crossing triggering circuit and adopt a novel structure of SCR in parallel with contactor to solve the problem of on-state power loss in SCR.
Based on zero crossing representation of wavelet transform of this radial function and matching procedure, a new algorithm to identify orbits of shaft centerline is proposed.
Two technologies, spectral channelization and spectral analysis with zero crossing that could be both applied to multi-signals, are also introduced.
Bar code recognition is a matter of edge detection, which has long been done through the maximum value of the first derivative or zero crossing of the second derivative.
The display system "looks" for the zero crossing of the sync pulse.