zero-crossing的例句大全

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.

the algorithm of measuring zero-crossings can better draw the characteristic parameters ofthe pulse signal.

提出了过零点检测算法，提取了脉搏信号的特征值。

The new methods can rapidly and efficiently obtain the informations of a real sinusoidal signal's phase on time domain or frequency domain by zero-crossings or FFT transforming. The modified methods can extend the threshold SNR of frequency estimation, and it is easily implemented.

新的修改算法利用零交越或FFT变换，能快速有效地在时域或频域上得到实正弦信号的相位信息，改善了频率估计的SNR阈值，且便于工程实现。

TSC trigger circuit was designed, including the zero-crossing detection circuit and thyristor trigger circuit. And contactor was combined with the thyristor switch used in TSC.

设计了TSC触发电路，其中包括过零检测电路与晶闸管触发电路，并将接触器与晶闸管组合成复合开关应用在电容器投切中。

After the pretreatment on the speech signal, adopt a algorithm according to short time average amplitude and zero-crossing rate which raised the applicability for different type words.

论文首先对语音信号进行预处理，然后采用一种基于短时平均幅度和短时平均过零率的手段进行断点检测，提高了算法对于不同类型词语的适用性。

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。

Comparison the advantages and disadvantages of the cutting-edge timing, the zero-crossing timing and constant fraction timing discriminator.

在比较了前沿定时、过零定时和恒比定时技术的优缺点后，详细分析了恒比定时技术的性能，提出了设计方案。

MCU get timing reference by zero-crossing detection. It compare the current speed feedback with the object feedback, and control the conduction phase and time using PWM mode to realize the stable speed-regulating of AC PG-motor.

单片机通过过零检测获取计时基准，比较当前转速反馈与目标反馈，采用脉宽调制PWM方式来控制三端双向可控硅开关器件的导通相位角及导通时间，实现交流PG电机的平稳调速。

Abstract: Zero-crossing edge detection method was analyzed.

文摘: 讨论二阶导数过零边缘检测方法.

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.

the application of zero-crossings of laser speckle for real-time monitoring of velocity of lymph flow.

散斑跨零点法在实时监测淋巴流速中的应用。

Furthermore, to improve the power factor, a novel design can considerably minimum THD of the AC input current by increasing the switch-on time near the zero-crossings of the line voltage.

另外芯片内部还特别加入了一个优化电路，可以增大功率开关管在交流输入电压过零时的导通时间，优化输入交流电流的THD，进一步改善功率因数。

By constructing special digital signal sequences, the relation of the number of levels of zero-crossing points and the M value of MPSK signal was analyzed, and the phenomenon that different phase difference modes correspond to different levels of zero-crossing points was discussed in detail.

通过构造特殊的数字序列，分析了小波系数过零点分层数与MPSK信号的电平数M的对应关系，详细讨论了MPSK信号不同的相位跳变模式与过零点层次性的内在联系。

The slope standard error and correlation coefficient of zero-crossing linear fitting

过原点直线拟合的斜率标准差与相关系数

In this paper, multi-parameters ( short-time energy, short-time zero-crossing rate and autocorrelation function values) combination has been adopted to judge the unvoiced/ voiced of speech signal. Then circular average magnitude difference function has been used to calculate pitch.

采用基于多参数组合方法（短时能量、短时过零率、自相关函数值）进行语音信号清浊音判别，利用循环平均幅度差函数进行基音周期计算。

AC control is a normal application for triacs and SCRs because the turnoff time is decreased when the device is switched off during a zero-crossing.

由于器件在过零时被关断会降低关断时间，所以双向晶闸管和SCR通常用于交流控制。

Research on Method of Iris Recognition Based on Zero-Crossing Detection

基于过零点检测的虹膜识别算法研究

To overcome the false result with piecewise constant regions produced by the binary zero-crossing decision process, a hyperbolic tangent function is used to substitute the symbol function, governing softly the varieties of gray levels of pixels beside the zero-crossing of edges.

为了克服二值的零交叉决策过程导致的虚假的分片常数图像，利用双曲正切函数代替符号函数，柔和地控制边缘的零交叉点两侧像素的灰度值变化。

in the other, we use the particular attributes of zero-crossings as constraint in coarse matching, which can improve the matching speed.

另一方面，使用过零点的特有属性作为粗匹配的匹配约束，可以提高匹配速度。

image edge detection using wavelet-transform based on locating zero-crossings

基于过零检测的子波变换图像边缘检测