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- spectral shift zero crossing 频移过零点法
- The display system "looks" for the zero crossing of the sync pulse. 终端显示系统将识别这个同步脉冲的过零跳变。
- This spectral shift permits laser light to selectively excite molecules containing one isotope while leaving the molecules containing the other isotope undisturbed. 这种谱线位移使我们能够利用激光有选择地激发含有某一同位素的分子，而含有其他同位素的分子则完全不受扰动。
- This paper deals with the influence of turbulence on the spectral shift of the Gaussian Schell-model (GSM) beam, which is taken as a typical example of partially coherent light. 以高斯谢尔模型(GSM)光束作为部分相干光的典型例子,研究湍流对高斯谢尔模型光束光谱移动的影响。
- wildcard show 复活赛
- The BEMF zero crossing comparators are disabled during open-loop sped-up until the target velocity is reached. 反电动势的过零检测开始是没有被使能的，直到电机转子的速度达到了一定的速度。
- LFMCW radar nonlinear residual frequency errors zero crossing detection periodogram. 标 签 LFMCW雷达 非线性剩余频差 过零检测 周期图.
- Wavelet transform zero crossing detection method can be used for the coding and recognition of human iris. 使用小波变换过零检测算法可实现人眼虹膜图像的编码和识别。
- Discrete-Time Hilbert transformer (12) isolates the only the positive spectral peaks, thus yielding a VAC signal that affords greater control over zero crossings. 一离散时间希尔伯特变换器(12)仅分离正的频谱峰值，由此产生一VAC信号，该信号对过零点提供良好的控制。
- It is shown that the spectral shift takes place, which depends on the position of the field point, spatial correlation length and the temporal coherence length, as GSMP beams propagate in free space. 结果表明，部分空间和部分光谱相干高斯-谢尔模型脉冲光束在自由空间传输中发生了光谱移动，光谱移动与场点位置、空间相关长度和时间相干长度有关。
- May include some or all of the following: SAG and Peak detections, Peak level recording, Line Period measurement and Zero Crossing Detection. 可能包括下列功能中的部分功能或者全部功能:SAG及峰值检测,峰值记录,周期测量及过零检测。
- And it searches much further for the unvoiced frame according to the ZCR(zero crossing rate),which is differ from unvoiced frame to background frame. 根据背景音和静音过零率的不同,进一步搜索符合要求的静音帧;
- When the target velocity is reached, the BEMF zero crossing comparators are enabled before leaving the open-loop speed-up subroutine. 到这时，反电动势过零比较电路才开始工作直到电机启动结束。
- The conventional back-EMF zero crossing method was restricted by hardware and control method,and to improve the detecting circuit reduce the influence. 常规反电势过零检测电路由于受到硬件及控制方法的影响,过零点信息不够准确而且有较大的滞后,通过对检测电路的改进来减小这种影响。
- SSCR spectral shift control reactor 谱移控制反应堆
- With Brushless DC(BLDC) motor to control special MCU, and ?the technology of zero crossing of back-electromotive force (BEMF),it achieves the control of BLDC's sensorless. 采用专用的无刷直流电机控制单片机，应用反电动势过零检测技术,实现无刷直流电机无位置传感器的控制。
- The zero crossing signal of the true phase back EMF can be directly obtained from the motor terminal voltage by properly choosing the PWM and switch control strategy. 该方法不需要引出电机中性点,通过选择PWM和导通控制策略,就能直接从电机端电压获得反电势过零点信号。
- SUONAN Jia-le,GE Yao-zhong,WANG Ding-an,et al.A new frequency measurement algorithm uninfluenced by zero crossing of voltage[J].Proceedings of the EPSA,1996,8(4): 19-21. [1]索南加乐;葛耀中;王定安;等.;一种不受电压过零点影响的新型频率测量方法[J]
- Spectral Shift of Partially Coherent Spatial Soliton 部分相干空间孤子的频移
- The performances and characteristiss of the zero crossing digital demodulation is ana lysed through the comparison of various ways of Fsk signal digital demodulation. And ideal conclusion is reached. 对各种频移键控信号的数字解调方法进行了研究和比较，并重点分析了零交点数字解调法的性能特征，最后得出了一个最佳结论.
