故障信号

A method is proposed by separating ambient noise signal and withdrawing the early-time multi-breakdowns of diesel engine based on natural gradient algorithm in the case that the number of vibration sources is unknown.

提出一种在振动源个数未知的情况下，采用自然梯度算法分离环境噪声信号的同时提取柴油机早期多故障的方法。

The valve motion, the work process of the cylinder and the change of the pressure in the valve chamber are related by "pressure inspire", and the corresponding mathematical model is set up.

考虑某些实际应用中直接测取往复压缩机气缸压力的不便，提出采用阀腔脉动压力替代气缸压力，未作为热力参数法的主要故障诊断信号的新思路，并通过&压力激发&将阀片运动规律、气缸工作过程和陶腔压力变化互相联系起来，建立相应的数学模型。

My turn signal flasher relay had gone faulty during the last short ride, and was now stuck "on."

轮到我信号闪光继电器故障已在过去坐车，现在卡&上。&

Though measuring the acceleration of pump shell and analysis the signal, to realize fault diagnosis.

通过对柱塞泵壳体振动的监测及信号分析处理，实现该泵的故障诊断。

The demodulated resonance technique combined with spectrum analysis and fuzzy-closest-principle were developed and applied to the fault diagnosis of bearings in drilling pump.

在钻井生产现场，由于工作条件恶劣及振源多，背景噪声强烈，因而用理论计算所得到的故障特征频率与实测信号经一般频谱分析后得到的响应信息缺乏一一对应关系。

Aformula which describes the transient process from beginning traveling waveto steadytraveling wave was deduced and the concept of initial traveling wave stagefirst was defined and its duration was given. It leads to a conclusion that reflectionfactor is a time dependent function, and variation range and reflection factor atdifferent stage were presented .Based on unified traveling wave theory andtransmission line model of reflective terminal with energy storage element , powerpolarity of initial traveling wave was analysed with both physical and mathematicalmethod.

通过理论推导得出从初始行波到稳态行波过渡过程的数学公式，统一了不同阶段的故障分量信号；定义了初始行波的概念，并指出了其持续时间的影响因素，针对末端含有储能元件系统，从物理和数学两方面剖析了初始行波的功率极性；通过分析提出反射系数是时变函数，给出了在不同暂态阶段行波反射系数的变化范围。

It is to protect the valve and make the safe use of the device, is also a valve failure signal device.

它是保护减压阀并使之安全使用的装置，也是减压阀出现故障的信号装置。

It is to protect the valve and make the safe use of the device, is also alve Balance Valves failure signal device.

它是保护减压阀并使之安全使用的装置，也是减压阀出现故障的信号装置。

The hardware design project and principle are presented in detail, including the sensor and the single-chip microcomputer select, the signal processing circuit, the real-time clock circuit, the alarm circuit, the wireless receiving and transmitting circuit, the extension of FLASH memorizer, the key-board circuit and USB interface circuit, etc. As the counterpart, the software function modules are presented as well, including the main program of transmitter and receiver, the data acquisition and processing module, the display function module, the key function module, the three-level alarm on fault parameters module, the fault parameters memorizing and inquiring module and the wireless transmitting and receiving module, etc.

论文详细介绍了系统的硬件设计方案及其工作原理，包括传感器的选择、单片机的选择、信号调理电路、实时时钟电路、报警电路、FLASH存储器、无线发射与接收电路、键盘电路和USB接口电路等；同时详细介绍了软件设计方案及具体实现方法，包括发射机主程序、接收机主程序、数据采集与处理模块、键盘处理模块、故障数据存储与查询模块、显示功能模块、报警模块、无线发射与接收模块等。

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。