故障

The experimental results show that this presented model obtains better results than that of the Naive B Bayesian, the Random forest, and the NNge predietion models when the high and low severity faults and the ungraded severity fault are distinguished.

实验结果表明，与基于朴素贝叶斯的预测模型、随机预测模型和NNge预测模型相比，本文提出的预测模型对于高严重程度故障、低严重程度故障以及未划分故障严重程度的情形均获得较好的预测效果。

The fault diagnosis expert system based on diagnosis unit and rule is established.It can realize fault orientation by using multilayer mixed reasoning model.

基于诊断基元和产生式规则的专家系统，根据初始故障现象找出最底层故障基元，通过多层正反向混合推理模型，实现故障最终定位。

Impacts of varying stress on unit in low temperature, reason and harm of losing oil and slugging, and reaction to slugging for different types of compressors are analyzed. The fault cause is understood. Exact improving measures for unit and methods of faults detection are given, which solve the problem of compressor running fault in some degree.

分析了低温环境下交变应力对机组的影响、失油和液击产生的原因和危害及不同类型压缩机对液击的反应，了解了故障产生的根源，给出了改进热泵机组的具体措施及现有机组的故障检测方法，认为这样可以在很大程度上解决压缩机运行故障问题。

Hardware services: Giving advices on system configuration and hardware updating; diagnosing, pin-pointing and obviating hardware failures; repairing the repairable, giving advices on the replacement of the unrepairable; purchasing and installing new components.

硬件服务：系统配置建议；硬件升级建议；硬件故障诊断、定位、排除；可修复故障硬件的修复；不可修复故障硬件的更换建议及代购、安装。

A low frequency rolling bearing fault diagnosis method based on local projective noise reduction;2. According to characteristics of both the vibration signals and the stator currents when appering a fault in the rolling bearing of the induction motor,Park vector module signal of the three-phase current is calculated,and the envelope of vibration signals from the rolling bearing of the motor is analyzed.

根据感应电机轴承发生故障时的振动信号特性以及定子电流特性，求出三相电流的Park矢量模信号，并将其与电机滚动轴承振动信号经解调处理后的包络信号进行融合分析，可以从振动信号与电流信号的融合谱图中有效地提取轴承故障特征信息，并将其作为故障识别的依据。

The first part of this paper introduces the fault mechanism of turbo generator's vibration, as well as common on-line diagnosis methods based on fault mechanism and characteristics. Besides, it provides the pros and cons of each method.

本文首先研究汽轮发电机振动的故障机理，介绍常用的基于故障机理及故障特征的在线诊断方法，并比较各种方法的优缺点。

Accordingly, the vibration theory, vibration sources and the part vibration fault features of turbine generator units are analysed, sorted out and finalized so as to lay a solid foundation for the establishment of fault diagnosis expert knowledge bank.

本文首先论述了水轮发电机组故障诊断的重要意义，详细分析了故障诊断的研究现状及发展趋势，并对故障诊断的应用前景做了进一步分析。

Based on the fault tree of the cooling water system in asphalt gas decontaminating for carbon calciner,quantified evaluating system of reliability of cooling water system is set up by using of quantified analysis theory of fault tree.

在建立焙烧炉沥青烟气净化系统中冷却水系统故障树的基础上，运用故障树定量分析理论，建立了冷却水系统可靠性定量评价体系，对该系统发生故障的概率作出判断，从而能够及时、合理地确定冷却水系统的状况，以便及时采取应变措施，保持系统可靠运行

This paper regards the copper electrolyze anode product line under electricity-hydraulic controlling as its researching object and studies the technology on hydraulic malfunction diagnosis thoroughly, it also analyzes integrate the methods of malfunction diagnosis and the malfunction forms of hydraulic components. Basing on this knowledge, this paper designs a process surveillance system for hydraulic pump of anode product line.

本文以电液控制铜电解阳极生产线为研究对象，具体到生产线液压系统的动力来源——液压泵，对液压故障诊断技术进行了较为深入的研究，对故障诊断的方法、液压泵的故障形式进行了综合分析，在此基础上，设计了阳极生产线生产过程中液压泵的监视系统。

The paper studies fault diagnosis technology based on fruticose gas pipe network which is universal in small towns,and gives a particular description of domestic and foreign gas pipe network fault diagnosis technique based on hardware and software currently. The author uses graph theory to build up hydraulic analysis model of natural gas network and presents its solution methods. Besides, the author works out the relation between gas pipe pressure and flux in unsteady condition of fluid flow according to pressure boundary condition and differential equation group, and puts forward fault diagnosis methods and steps of the fruticose natural gas pipe network of middle pressure based on the simplification of this relation.

本文针对小城镇比较普遍的枝状天然气分配管网进行故障诊断技术研究，详细叙述了目前国内外基于硬件和软件的燃气管网故障诊断技术，利用图论理论建立了天然气管网水力分析模型并叙述了其求解方法，根据燃气管内流动的微分方程组和压力边界条件求解出非稳定流动时燃气管道压力和流量的关系，并在对此关系进行简化的基础上提出了基于中压枝状天然气管网的故障诊断方法和步骤。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。