zero-crossing

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。

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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。

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We used the AEQ method based on zero-crossing rate to control acoustic feed-back. 4.

用基于过零率的AEQ方法进行声反馈控制。

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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.

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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。

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Binaural Sound Localization Based on Detection of Multi-band Zero-crossing Points

基于分频过零点探测的双耳声源定位

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The algorithm is robust about noise, rotation and so on. And it has strong security and uniqueness. ( 2) Based on the perceptual hashing of the speech ZCR ( zero-crossing rate) and speech centroid, a speech content authentication algorithm is proposed.

算法对旋转、噪声是鲁棒的，同时也具有较强的安全性与唯一性。（2）根据语音过零率及质心特征，设计了一种基于感知哈希的语音内容认证算法。

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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

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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.

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The stability against playback speed modification of ZCR ( zero-crossing rate) of audio signal is confirmed by theoretical analysis and experiments.

分析并通过实验验证了音频信号的过零率对回放速度修改这种去同步攻击的稳定性。

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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。

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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。

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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

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Abstract: Zero-crossing edge detection method was analyzed.

文摘: 讨论二阶导数过零边缘检测方法.

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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。

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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.

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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。

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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。

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Based on traditional attenuation factor method, the short-term energy and the short-term zero crossing rate of the speech signal is used to dynamically revise the mixing factor in the proposed method.

该算法在传统的混音衰减因子法的基础上，采用短时能量及短时过零率对混音的衰减因子进行动态修正。

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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。

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