If need ssr control signal output or scr zero - crossing trigger pulse output please explain while ordering 输出或可控硅s c r过零触发脉冲输出，订货时请注明。
The relationship between the scales at zero - cross areas and the mode of phase difference is developed Mpsk信号的特征提取和分类一直是通信领域关注的焦点也是一个难点。
The traditional methods of edge detection are based on one - order derivative ' s maximum , or two - order derivative ' s zero - crossing 传统的边缘检测基于一阶导数极大值或二阶导数零交叉的定义。
This paper presents a solution for phase measurement using numeric zero - crossing and tms320lf2407 16 - bit fixed - point digital signal processor 相位计采用数字信号处理技术，可以有效地实现相位差的高精度测量。
As to the software , it realized feature extraction and target identification from the seismic signals of representative moving targets using the zero - crossing method in time domain 软件采用时域上的过零算法对典型地面运动目标(如车辆、人员)的地震动信号进行特征提取，目标识别。
In view of theproperties of infrared thermal images , narrow - range zero - crossing edge detection method was applied to detect the edges of welding flaws and good results were obtained 针对红外热图象的灰度特性，提出了窄范围二阶导数过零边缘检测用于焊接缺陷的边缘提取，获得了较好的效果。
( 3 ) study the segmentation and recognition of audio frequency signal . audio signal can be divided into segments based on zero - crossing rate . ( 4 ) a audio recognition arithmetic based on mfcc is proposed 音频信号的处理作为项目的一部分,根据要求实现了对单一音频信号的识别,用vc6 . 0来实现。
The multiresolution zero - crossing of binary wavelet transform are used as matching primitives . the algorithm uses a coarse - to - fine matching strategy and strict constraints 在匹配过程中采用由粗到精的层次匹配策略和严格的匹配约束，减小了对应点搜索范围，并从局部和整体2个角度来解决歧义匹配的问题。
Mostly , traditional arithmetic of image edge detection distill edge using gradient maximum or zero - crossing which base on gray discontinuousness on edge . they are affected easily by noise 传统的边缘检测算子大都是基于边缘的灰度不连续性利用梯度局部最大值或二阶导数过零点来检测边缘，容易受噪声干扰。
( 2 ) study the character of audio signal . analyze the zero - crossing rate and mfcc . a mean mel coefficients is proposed , it can be used to recognized different audio signal 通过对mfcc系数进行分析,均值mfcc系数作为音频特征,采用动态时间规整识别算法,能够对单一音频进行识别,对已有数据源进行测试,有较高的识别率。
