有故障

The technology of fault diagnosis is a new intercross technical science. Since it was applied to industrial enterprises, it has brings great benefits to the social and economic development.

设备故障诊断是一门交叉工程学科，在工业企业的成功应用带来了巨大的社会和经济效益，使得设备故障诊断技术从理论研究到实际应用都有迅速的发展。

Two effective methods have been proposed finally to locate the faulty ONU using these internality resource...

文章还提出了两种可实现故障定位的方法，表明EPON完全有能力完成故障定位，进而增强系统的可靠性。

Methods to rotor of centrifugal compressor"s condition monitoring and fault diagnosis are summed up. Peak-to-peak value is an essential reference value of centrifugal compressor"s condition monitoring, which is easy to implementation in practice. On the other hand, according to fault diagnosis, power spectrum and axis obit also works. The direction of eddyis gained from full spectrum, which is vital in fault diagnosis. In a word, to make sure make an exact conclusion, different method should be put in used.

总结了离心式压缩机转子振动的监测和诊断的方法：在压缩机的状态监测的方面，峰—峰值是其主要的手段，实践证明其实现过程非常简单而且非常有效；而对于故障诊断，常用的功率谱分析和轴心轨迹都有一定的作用，全谱可以判断转子的进动方向，所以在分析过程中可以综合以上多种方法，能更加明确故障原因。

In the process of calculation ,not only the decouplable feature of symmetrical elements in the coordinate system of symmetrical components is fully utilized,but also the symmetrical parts and unsymmetrical parts are treated as separate blocks, thus the efficiency of calculation is rasied moreover.

建立用于故障分析的网络的数学模型是计算机编程计算的基础。当前在电力网络中最常用的网络参数矩阵有节点参数矩阵和支路参数矩阵。在故障分析计算中一般采用网络节点参数矩阵作为电力网络的数学模型，又主要使用节点导纳矩阵作为分析的基础。

Hence when it doesn't work normally we should make use of various examination means to diagnosis breakdown following reasonable steps so as to the repairmen can be carry out particularly.

希望通过本文，对自动变速器的性能检测与常见故障的诊断有一定的了解；对于修理人员在通过对自动变速器进行性能检测来检测故障诊断时能够起到一定的帮助。

Such failures are usually due to memory or power quality problems, of course, the system restarts there may be adverse or other CPU cooling caused by human error, which can only use step-by-step rule out the possibility of elimination.

此类故障一般是由于内存条或电源质量有问题造成，当然，系统重新启动还有可能是CPU散热不良或其他人为故障造成，对此，唯有用排除法一步一步排除。

Aim at the bad efficiency of refrigeration, the mixture of air or Freon superfluously was diagnosed as the result faulty source, consistent with the factual system.

针对制冷效果不佳的症状，仿真诊断出故障源为系统中有空气或氟利昂充液量过大的故障，与实际系统相一致。

On the basis of analyzing the law of variation of the zero order current, the zero order voltage and the zero order power in the isolated neutral system, a synthetic criteria principle of selecting the grounded fault line according to three criterias at the same time was put forward.

1中性点不接地系统零序电流的分析中性点不接地系统在发生故障时零序电流的变化最明显，因而对故障情形下零序电流的大小、相位及其功率等关系进行分析很有必要。1.1零序电流的大小关系对于NUS，其线路图见图1。图中kl和k：断开。

Analyzing the concentrations of these byproducts, which can be determinated when the electric equipment is electriferous, is an effective method to judge the internal condition of Gas Insulated Switchgear.

检测SF6 分解产物（可在设备带电状态下进行）是诊断SF6 气体绝缘设备内部运行情况的一个强有力的手段，据此可判断设备是否故障，并确定故障的具体部位，近年来已有不少成功案例。

Signed directed graphis a model to describe the propagation relationships among faults in large-scale complex systems, but it can just make qualitative inference along the consistent paths to isolate faults.

符号有向图是大规模复杂系统中故障传播关系的描述模型，但它仅能通过在相容通路上的定性推理进行故障分离，因此有着明显的局限性。

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。