出故障的

When the grid suffers a short circuit fault, the relays in the grid, which have cooperate relation, find the element that the fault locates in, and insulate this element from the grid rapidly.

当电网发生短路故障时，安装于系统各个元件上的有着相互配合关系的保护装置判别出发生故障的元件，并迅速将故障元件从系统中隔离出来，使得系统剩余部分能正常运行。

In simulation, the parameter perturbation of non-linear systems, amplifier troubles and servo stagnant trouble of system was studied, As a result, this method can diagnosis fault effectively.

仿真中以非线性系统的参数摄动时和伺服系统中的阀放大器故障和伺服阀卡滞型故障进行了研究，结果表明这种方法能有效的诊断出故障。

The wavelet packet analysis applied in fault diagnosis system is studied in this thesis. Using simulation fault data, uncalm and time difference vibration signal of sodium pump are decomposed on different levels and frequencies.

对小波包分析应用于故障诊断进行了研究，利用仿真出来的故障数据，将快堆钠泵非平稳时变振动信号分解到不同层次和不同频带上，有效地提取出反映钠泵不同故障的特征向量，在识别中得到了满意的结果。

The wavelet packet analysis applied in fault diagnosis system is studied in this thesis. Using simulation fault data, uncalm and time difference vibration signal of sodium pump are decomposed on different levels and frequencies. To picked-up the eigenvectors reflecting different fault of sodium pump with availability, simulation results have shown its satisfaction in the identification.

对小波包分析应用于故障诊断进行了研究，利用仿真出来的故障数据，将快堆钠泵非平稳时变振动信号分解到不同层次和不同频带上，有效地提取出反映钠泵不同故障的特征向量，在识别中得到了满意的结果。

According to analyzing the characteristic of the logic of "and" and "or" gates, this paper derives a conversion rule between the logic of fault tree and the step function. Using this conversion, we can convert fault tree to step function which is easy to calculate by programming in the computer.

通过对故障树中逻辑"与"门和"或"门的特点进行分析，推导出故障树逻辑关系与阶跃函数之间的转换规则，利用该规则可将故障树转化为便于编程求解的函数表达式。

By the theoretical analysis of the subminiature breakdown of full flow during the test of the variable pump of constant voltage,we can find the reason of the breakdown and take measure to fix it.

通过对恒压式变量泵在试验中出现全流量超小故障的理论分析，找出了故障原因，并有针对性地采取了排除措施，即(1)减小弹簧刚度，(2)弹簧材料改为高温稳定性较好的材料，并经48小时加载荷压缩处理，(3)在试验中严格控制零流量压力公差，使故障有效排除，从而从根本上解决了生产中的疑难问题。

The accident of a tube of a high alcohol hydrogenation reactor in chemical plant was analyzed,and the reason of the accident and design a new structure of the reactor tube was found out The usage in a chemical plant shows that the design of the new structure is vali

对化工厂原有高压醇加氢反应管经常出现的故障进行了分析，找出引起故障的原因，设计出一种新型的高压醇加氢反应管，经化工厂使用，证明这种新型的高压醇加氢反应管是可行

The damage analysis of cracked turbine disk in the rocket engine is described. From a series of analyses, the causes of failure were reasoned through calculation and experiments, fatigue analyses which include stimulating vibration test and fatigue strength calculation were emphasized.

针对某火箭发动机涡轮盘在热试车中出现的裂纹故障，进行全面的分析，准确定位故障类型，以试验和计算分析给出合理的故障原因，重点是在疲劳分析方面所做的工作，包括振动模拟试验、疲劳强度计算，并根据疲劳强度分析结果提出改进方案。

A feasible method for location of multipoint earthing faults of transformer iron-core based on infrared thermal imaging is developed and proved in this paper, the temperature feature of kinds of material faults is summarized during the imitating test of locating faults.

首次提出并验证了采用红外热成像技术定位变压器铁心多点接地故障的方法及其可行性，通过对变压器铁心多点接地故障的模拟试验，总结出在定位过程中不同故障物质的温度特征。

The behaviors of traveling wave protection, du/dt protection, line low-voltage protection and line differential current protection are proposed which can illustrate the fault process clearly.

通过读取故障的原始录波数据，详细分析了这次故障的特征，给出了行波保护、电压突变量保护、线路低电压保护和线路差动保护的动作行为，使这次故障过程得到比较清楚的解释。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。