查询词典 fault detect

In real flight, multiple sensors of aircraft engine control system may fault at a time. In order to solve this problem, a revised multiple-failure-hypothesis based testing is investigated. This approach uses multiple Kalman filters, and each of Kalman filter is designed based on a specific hypothesis for detecting specific sensors fault, and then uses WSSR (Weighted Sum of Squared Residual) to deal with Kalman filter residuals, and residual signals are compared with threshold in order to make fault detection decisions. The simulation results show that the proposed method can be used to detect multiple sensors soft failures fast and accurately.

一般认为两个以上传感器同时发生故障的概率较小，但实际上不能排除其发生的可能性；提出了一种改进的多重故障假设方法来解决航空发动机控制系统多传感器同时发生软故障的问题，这一方法采用一组卡尔曼滤波器，每个滤波器对应一个被检测传感器的故障模态；采用残差加权二乘方处理滤波残差并与门限值作比较来判断是否发生故障；仿真结果表明，所提出的方法能有效解决多传感器软故障的检测与隔离问题。

This intormation is combined in the structure of a Bayesian Graph so as to identify unknown or unpredictable faults. The final experiment results show the intelligent agent can detect network abnormal behavior before a fault actually occurs. Event correlation algorithm for network fault real-time isolation and handle uses object-oriented model method for critical network device and a novel coding scheme, even if in the case of lost alarm and wrong one, it also can identify the fault origin and automatically adapts to changes to network topology to ensure seemless scalability to large and complex network environment. Its performance greatly presides over traditional rule-based event management system.

对学习获得的信息经由贝叶斯图加以组合，从而签别未知的或不可预见的故障，实验结果表明智能监测代理系统能够在故障发生以前检测网络异常行为；用于网络故障问题实时隔离和处理的事件关联算法使用面向对象的针对的网络关键设备的建模方法和新型编码技术，即使在丢失报警和错误报警的情况下，亦能精确地标识故障源，并能自动适应网络拓扑的改变，从而保证无缝地伸缩到专用大型和复杂网络环境中，其性能大大优于传统的基于规则识别的事件关联系统。

In this project, we have tackled the robust fault detection and diagnosis problem for affine nonlinear sampled-data systems based on nonlinear H∞ filtering theory,and focused on the design of robust fault dtetction filter. The main contribution of this project is that we (1)present design methods of robust fault estimator for nonlinear discrete-time systems based on least square estimation and linear matrix inequality;(2)improve the bounded real lemma of systems with finite discrete jumps;(3)develop the robust fault detection filters for affine nonlinear sampled-data systems with parameter uncertainties based on the improved bounded real lemma.

本项目以提高故障的正确检测率为目的，以非线性H∞滤波理论为基础，对不确定仿射非线性采样系统的鲁棒故障检测与诊断问题进行了研究，重点研究了不确定仿射非线性采样系统的鲁棒故障检测滤波器设计问题，取得了一些新的成果，主要成果有：(1)基于最小二乘估计和线性矩阵不等式，给出了非线性离散系统的鲁棒故障估计器设计方法；(2)改进了有限跳跃点系统的有界实引理；（3）基于改进的有界实引理，给出了不确定仿射非线性采样系统的鲁棒故障检测滤波器的设计方法。

Normal Fault Flash Animation 正向断层Flash动画 thrust fault - a dip-slip fault in which the upper block, above the fault plane, moves up and over the lower block.

冲断层 -断层平面上面的岩体向上运动并压住下面的岩体的一种倾滑断层。

These are melancholy days; for there is always a certain amount of night even in this madness, there is suicide in this duel, and those words which are intended to be insults-- beggars, canaille, ochlocracy, populace--exhibit, alas! Rather the fault of those who reign than the fault of those who suffer; rather the fault of the privileged than the fault of the disinherited.

那是一些阴惨的日子，因为即使是在那种暴乱中，总还有一定程度的法律，在那种决斗中还有着自杀的性质；并且，不幸的是，从穷棒子、乱民、暴民、群氓这些带谩骂意味的字眼中，人们体验到的往往是统治阶层的错误而不是受苦受难者的错误；是特权阶层的错误，而不是一无所有者的错误。

Examples show that SVI can identify the fault when there is no collinearity between fault sensors and can not identify the fault when there is collinearity between fault sensors.

实例表明，对于非共线性的传感器，SVI指数能较好地识别故障，但是当故障传感器与非故障传感器存在共线性时，SVI指数就无能为力了。

Along the fault we may recognize at least eight fault scarps or steep fault slopes whose heights are 0.33-0.62 m, 4.3-5.2 m, 6.8-8.3 m, 10-11.8 m,～16 m, 20-28 m, 45-50 m and 65-80 m respectively, as well as river terraces, diluvial fans and spring sinter platforms that may largely correspond with these fault scarps.

沿断层至少可以识别出高度分别为0.33～0.62m、4.3～5.2m、6.8～8.3m、10～11.8m、约16m、20～28m、45～50m和65～80m的8套断层崖或断层陡坎，以及与各级断层崖大致对应的河流阶地、洪积扇和泉华台地。

By using the steepest descent rule, the estimated second-truncated Volterra kernel parameters can be obtained after the object function converged. Based on the above results, the geometric assignment of kernel parameter vector corresponding to particular fault or normal operation, which is lies in a fixed and fault-specified direction in the parameter space, was used to fault diagnosis and Fault Isolation.

第四章针对起动发电机系统在起动过程具有较强的非线性特性，利用非线性volterra建模后获取的核参数向量来表征起动发电机的正常工作及各种故障模型，而核参数求值过程中快速收敛，有利于实现故障的快速、准确诊断与故障类型分离。

We also propose the structure of intelligent sensor system for collecting the pre-fault sign, the pick-up and analyzing method to the pre-fault sign. Give the structure of intelligent fault-tolerant computer system that based on fault prediction.

研究了软件容错的方法，特别是单版本复指软件对瞬时硬件故障有良好的容错特性，文中提出了实现单版本复执软件的实用方法，并给出了分块复执软件实现的条件。

The main study in the paper is as follows: Firstly, discussing the purpose of carrying on hydropower units fault diagnosis, then, introduce state of the art and classical method in the field of fault diagnosis in hydroelectric sets. The mechanism, major failure and failure symptom of hydropower units, three methods that can identify unit's vibration fault. With the key technology of monitoring on hydropower sets together with the viberation signal-disposed and fault feature-extracted are analysised.

本文主要进行了以下工作：从水电厂实际出发，阐述了开展水电机组故障诊断研究的重要意义与目的，简要介绍了国内外水电机组故障诊断技术发展现状以及目前应用于故障诊断领域的常用方法，系统地分析归纳了水电机组振动的机理、主要故障及其故障征兆、识别水电机组振动故障原因的三种方法，以及水电机组监测的关键技术和故障特征提取技术。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。