由国际自动控制联合会(IFAC)主办,中国自动化学会协办,清华大学承办的第6届IFAC Symposium on Fault Detection,Supervision and Safety of Technical Processes会议已获IFAC批准,会议定于2006年8月30日至9月1日在北京召开。
作者:彭涛; 赵帅; 但汉兵; 玉华雄 期刊:《中南大学学报·社会科学版》 2017年第11期
The open-circuit fault of the power switches in shunt active power filter (SAPF) would exacerbate the harmonic pollution of power grid, and degrade the reliability of the devices and system. A fault diagnosis method is proposed based on reference model and an over-modulation strategy under hardware fault tolerance for SAPF. First, a mathematic model is established for SAPF. Second,the residuals ...
Fault, defeat, falling, flaw, shortcoming,这组词(n.)都指人或物在某方面有缺陷,不够完善,以faulI和defeat为常用。
作者:Hui; Yang; Yongshen; Liang; Qiuyan; Yao; Shaoyong; Guo; Ao; Yu; Jie; Zhang 期刊:《中国通信》 2019年第06期
Software defined optical networking(SDON)is a critical technology for the next generation network with the advantages of programmable control and etc.As one of the key issues of SDON,the security of control plane has also received extensive attention,especially in certain network scenarios with high security requirement.Due to the existence of vulnerabilities and heavy overhead,the existing fire...
作者:ZHANG; Xiang; YE; Xiuwei; LV; Jinshui; SUN; Jinlong; WANG; Xiaona 期刊:《中国海洋大学学报·自然科学版》 2018年第01期
The Pearl River Estuary area,located in the middle part of the southern China coastal seismic belt,has long been considered a potential source of strong earthquakes above magnitude 7.0.To scientifically assess the potential strong earthquake risk in this area,a three-dimensional artificial seismic sounding experiment,consisting of a receiving array and seabed seismograph,was performed to reveal ...
作者:WAN; Kuiyuan; SUN; Jinlong; XU; Huilong; XIE; Xiaoling; XIA; Shaohong; ZHANG; Xiang; CAO; Jinghe; ZHAO; Fang; FAN; Chaoyan 期刊:《中国海洋大学学报·自然科学版》 2018年第01期
A cluster of earthquakes occurred in the Taiwan Shoal region on the outer rise of the Manila Trench.Although most were of small to medium magnitudes,one strong earthquake occurred on September 16,1994.Several previous studies have provided important information to progress our understanding of this single earthquake.However,little is currently known about the earthquake cluster,and it is necessa...
作者:LINAi-ruing 期刊:《地球科学进展》 2004年第03期
Field investigations allow to constrain the co-seismic surface rupture zone of ~400 km with a strike-slip up to 16.3 m associated with the 2001 Mw 7.8 Central Kunlun earthquake that occurred along the western segment of the Kunlun fault, northern Tibet. The co-seismic rupture structures are almost duplicated on the pre-existing fault traces of the Kunlun fault. The deformational characteristics...
作者:LINAi-ruing 期刊:《地球科学进展》 2004年第03期
Field investigations allow to constrain the co-seismic surface rupture zone of ~400 km with a strike-slip up to 16.3 m associated with the 2001 Mw 7.8 Central Kunlun earthquake that occurred along the western segment of the Kunlun fault, northern Tibet. The co-seismic rupture structures are almost duplicated on the pre-existing fault traces of the Kunlun fault. The deformational characteristics...
该文给出了CRH3型动车组制动及供风系统常见故障处理流程,以期对从事该型动车组制动系统教学和研究人员能有所帮助和指导,同时也可作为随车机械师处理制动系统故障的参考资料。
EPKS系统即过程知识系统,是一个规模可变的,带有基于各种知识驱动的应用,整合业务与制造智能化的平台;作为世界首套,百万吨级的煤直接液化的工艺流程;选用霍尼韦尔公司EPKS系统作为工业控制系统,是明智之举;可是在项目实施中,通讯符合核对,网络机构设计科学性,20英寸4:3显示器的停产,微软公司Windows XP停止服务等因素,给我们的工控系统的安全性,稳定性,造成一种威胁!
作者:Wang; Lei; Wang; Fengtao; Ma; Xiaojiang 期刊:《仪器仪表学报》 2006年第Z1期
To diagnose the reciprocating mechanical fault. We utilized local wave time-frequency approach. Firstly,we gave the principle. Secondly, the application of local wave time-frequency was given. Finally, we discussed its virtue in reciprocating mechanical fault diagnosis.
凌特公司推出的4通道电源排序器和监察器LTC2928可对电源接通和关断的顺序进行灵活配置、监视电源并诊断电源故障。该器件用简单的引脚配置方法实现排序,无需固件,它还允许4个电源按照8种时间位置任意组合形成的顺序排序,而且时间位置之间的延迟是可配置的。排序开始、监视、排序结束等每一个阶段都可有特有的比较器门限。比较器输出编码成4个数字输出,用于诊断故障类型(排序、欠压、外部控制器或外部故障)和失效通道。过压...
作者: 期刊:《武汉理工大学学报》 2006年第S2期
The ability to detect a new fault class can be a useful feature for an intelligent fault classification and diagnosis system.We adopt two novelty detection methods,the support vector data description (SVDD) and the Parzen density estimation, to represent known fault class samples,and to detect new fault class samples.The experiments on real multi-class bearing fault data show that the SVDD can g...
作者: 期刊:《武汉理工大学学报》 2006年第S2期
Traditional fault diagnosis systems of rolling mills mostly use single machine monitoring net,which leads the re- al-time data running only in the enterprise locally and can not monitor and manage the high-speed wire rolling mills between units, workshops and factories concentratedly.A new-type structure of remote diagnosis system for high-speed wire rolling mills is pre- sented in this paper.Th...
作者: 期刊:《武汉理工大学学报》 2006年第S2期
The component of gear vibration signal is very complex,when a localized tooth defect such as a tooth crack is pre- sent,the engagement of the cracked tooth will induce an impulsive change with comparatively low energy to the gear mesh signal and the background noise.This paper presents a new comprehensive demodulation method which combined with amplitude envelop demodulation and phase demodulati...
作者: 期刊:《武汉理工大学学报》 2006年第S3期
The early impulse fault diagnosis of the gearbox in rolling mills is often difficult and labour intensive because the gearbox of that high speed machine is multi-shafting transmission system,in which many gearsets and rolling bears work together at the same time and there are much complex frequency structure and various disturb.A new time-frequency method based on the wavelet packets technique w...
作者:Hong-chun; QU; Yuan-qiang; HUANG 期刊:《机床与液压》 2015年第18期
In order to improve the accuracy rate of aero-engne gas-path fault diagnosis based on BP neural network,this research uses the genetic algorithm to optimize the initial weights and thresholds of BP neural networkin their solution space, retrains the results by gradient descent algorithm and uses the optimized network to testifythe fault samples. The result shows that GA-BP network has a higher p...