故障信号

The pattern spectrum entropy and the barycenter scale location of the spectrum curve were used to input data to the support vector machine to identify different types of signals.The experimental...

通过对实验数据的分析表明，形态学分析与支持向量机相结合的方法为轴承故障信号的分析、识别和分类提供了新的思路。

The characteristic of higher-order cumulant is insensitive to Gaussian colored noise.

对故障信号进行傅立叶变换是我们常用的非参数化功率谱估计方法。

The most important thing in using CWT is to select proper wavelet base.

本文运用连续小波变换来提取往复机械故障信号的特征信息。

The analysis and distinguishment methods are proposed for the power system fault signal with wavelet transformation fast algorithm.

介绍了小波变换的基本原理，采用小波变换快速算法对电力系统中故障信号进行分析、判断。

At the same time, the simplified calculation method, all round dead state configuration, universal over-modulation principle and fast output block technology of fault PWM signals have been put forward.

提出了简化的开关时间计算方法、完善的死区设置、通用的超调制原则以及故障信号高速闭锁的实现方法。

It is necessary to apply new theory and technique to raise the level of fault signal processing.

为了提高故障信号的处理水平，引入新的理论及技术成果是十分必要的。

This procedure is used on the wavelet transform fault signal analysis and processing procedures.

此程序是关于小波变换用于故障信号分析和处理的程序。

Majority of traditional methods are based on the steady fault signal that is small and the affect is not satisfied.

传统的选线方法一般都是基于幅值比较小的稳态故障信号分量，选线效果不好。

Using the signals magnifying and waves sieving technology, this device can distinguish the a...

利用信号放大和滤波技术实现故障信号的识别。

Adopt one kind of design plan that PLC controls in the protection the main body of a book has been introduced succeeding an electricity in electric system, that capital is designed time is that the KV circuit imports 10 mainly , change into 380 V voltage grades, before the PLC front and back add front to passage and the queen to passage, change before to passage middle course electric current , voltage a train of, the wave filtering the general is exchanged changing waking up with a start for direct-current, the entering carrying out comparison and switch amounts again , controlling conducting entering PLC, by PLC, The malfunction signal is shown out by lamp light or the alarm signal.

本文介绍了在电力系统继电保护中采用PLC控制的一种设计方案，本次设计主要是将10KV线路输入，转化为380V电压等级，在PLC前后加入前向通道和后向通道，在前向通道中经过一系列的电流、电压转换，将交流转换为直流，进行滤波，再进行比较和开关量的输入，传入PLC，通过PLC的控制，将故障信号通过灯光或者报警信号表现出来。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。