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。
Firstly, a new zero-crossing detection method with software comparing with hardware is designed.
设计了一种新的软硬件相结合的方法去检测反电动势过零点。
This paper discusses an all digital phase-locked loop with a zero-crossing detector and a loop filter.
本文讨论的全数字锁相环包括过零检测器和环路滤波器。
The reason is that soonest at the next current zero-crossing the firing pulse of thyristors can be reset.
通常的短路故障电流会大大高于这个倍数，而软启动器的晶闸管本身是没有短路分断能力的。
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 trigger of SCR is a common problem in the practical application of SCR, especially in three-phrase systems.
在可控硅的实际应用中，经常会遇到可控硅过零触发问题，尤其在三相系统中，这种应用更为常见。
A new edge tracking algorithm based on zero-crossing edge detection technique is applied in the process of threshold computing.
在阈值计算过程中，还用到一种基于过零点边缘检测技术的边缘追踪算法。
This thesis illustrates the theory in how interleaving technology solves the problem of input current zero-crossing distortion.
本文对交错技术解决输入电流过零畸变的原理进行了说明。
The principle of the pitch detection and to increase the accuracy of pitch detection by using "Zero-crossing, detection. signal sep…"
文章还对其基频检测机理和采用“过零检测，信号分离”技术提高基频量测精度作了较详细的论述。
Due to DC arc extinguishing current has no natural zero-crossing point, so, DC arc can only been extinguished by forced zero-crossing-over.
由于直流熄弧电流不存在自然的过零点，因此必须强制过零才能熄灭直流电弧。
Then it makes use of the crossing points of the zero-crossing fingerprint graph of the curvature to establish the corresponding binary tree.
并利用其曲率函数的零交叉指纹图的交汇点建立相应的二元树。
The involved parameters are short-time amplitude and energy, lst-and2nd-order zero-crossing rate, autocorrelation function and pitch period.
所使用的参数是：信号的短时幅度与能量、一阶和二阶过零率、自相关函数及基音周期等。
Zero-crossing detector is capable of predicting the shape changes of power spectrum so as to find the newly emerged moving sound sources in ambient noise.
过零检测器可以通过预报功率谱形状的变化来发现环境噪声中新出现的运动声源，研究了过零检测器的检测性能。
The proposed system can improve which improving the reliability of communication by zero-crossing spread spectrum technology and active watchdog technology.
该系统采用过零点扩频通信方案大大提高了通信成功率，使用主动式看门狗电路提高系统的电磁兼容性。
Result Pulse signal of 20 healthy women and 20 pregnant women were examined by statistic analysis of the time-domain characteristic point zero-crossing position.
结果通过对20例健康人和20例孕妇脉象时域特征点过零点位置的统计及其变化快慢的计算，分析结果正好与实际相吻合。
The filter processes input discrete sampling signal to recover continuous signal and suppress harmonic noise, and the zero-crossing frequency measuring method is improved.
该滤波器通过处理输入离散采样信号获得连续信号并抑制谐波噪声，改进了过零测频方法。
Based on switch function model of TCSC and MATLAB, the digital simulation method in researching zero-crossing point characteristic of the capacitor voltage is put forward.
该文基于TCSC的开关函数模型并借助MATLAB仿真工具，提出了研究电容电压过零点特性的数字仿真方法。
The stability of the welding arc depends mainly on the voltage and the gas ionization when current zero-crossing as well as the electron emission ability of the electrode.
其电弧稳定与否，主要取决于电流过零瞬间的电弧空间电离度、 电极发射电子能力及再引燃电压的上升速度。
If a voltage change requires that a different tap be selected, the new tap is electronically switched in precisely at the zero-crossing, to avoid distorting the AC waveform.
如果电压变化需要选择不同的自来水，新的电子开关水龙头恰恰是在零交叉，以避免扭曲的交流波形。
Based on the B-Spline theory, this paper present a new kind of multi-scale wavelet transform. The feature of a signal can be extracted in its maximum module or zero-crossing.
本文基于数学样条理论提出了一种新的多尺度小波变换，通过其模极值或零交叉可以有效地提取信号的特征。
This thesis analyzes the zero-crossing distortion, and points out that the major causes are the inductor and the phase displacement between the input current and the input voltage.
本文对产生输入电流过零畸变的各种原因进行了定量分析，指出电感和输入电流与输入电压间的相位差是影响高频输入下输入电流过零畸变严重的根本原因。
In the denoising and preprocessing for seismic inversion, a zero-crossing filter is developed based on wavelet analysis to remove surface waves from the multi-component seismic data.
针对地震反演预处理的地震降噪问题，本文结合小波分析设计了一种过零点滤波器，对多分量地震资料进行了面波剔除研究。
They include signal sampling circuit, man-machine interface circuit and control circuit, main chip interface circuit, zero-crossing triggering circuit, and communication circuit, etc.
它们包括信号采样电路、人机接口电路、主控芯片接口电路、过零触发电路及通讯电路等。
The paper introduces the definition of wavelet transform and its properties. Especially the philosophy for zero-crossing wavelet and how it can be used in seismic prospecting are presented.
介绍了小波变换的定义及小波变换的性质，特别介绍了零通小波的理论及其如何在地震勘探资料处理中的应用。
One kind of sensorless control system for brushless DC motor based on DSP was introduced and the principle of back-EMF zero-crossing detection and realization method was discussed in detail.
介绍了反电动势过零位置检测的原理及实现方法，并采用了数字式转速、电流双闭环控制。
Through adding a zero-crossing comparator and optimizing the inverter switching logic, this method which is based on the traditional two-state hysteresis control can achieve three-state outputs.
该方法是在传统的两态滞环控制的基础上，增加过零比较器，通过优化逆变器的开关逻辑，从而实现滞环控制下并网逆变器的三态输出。
The zero-crossing of the wavelet transform of the normal person pulse-wave is found out as a fact that its the wavelet transform coefficients correspond strictly to its time field characteristic.
分析了正常的人脉搏信号的小波域特征，发现脉搏信号的时域特点严格对应于其小波变换的过零点。
In this paper, combined with the idea of Laser Speckle Velocimetry (LSV), experiments are carried out to measure the velocities of nano-particles in directional nanofluids with Zero-Crossing Method.
本文结合激光散斑测速技术（LSV），应用激光散斑过零法对定向流动的纳米流体中纳米粒子的运动状态进行了理论分析及实验研究。
In this paper, combined with the idea of Laser Speckle Velocimetry (LSV), experiments are carried out to measure the velocities of nano-particles in directional nanofluids with Zero-Crossing Method.
本文结合激光散斑测速技术（LSV），应用激光散斑过零法对定向流动的纳米流体中纳米粒子的运动状态进行了理论分析及实验研究。
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