In this paper, a dynamic fault model is proposed to predict yarn end breakage in the spinning procedure through investigation of fault characteristics. In view of the principle that uniformity bad in raw material caus...In this paper, a dynamic fault model is proposed to predict yarn end breakage in the spinning procedure through investigation of fault characteristics. In view of the principle that uniformity bad in raw material causes instable yarn formation, the investigation focuses on the fault characteristic existing in the dynamic tension. Analyzing the dynamic spinning system, the phenomenon of over random shock in a spinning triangle is discovered to be the main physical event prior to yarn end breakage. The fault characteristic is further confirmed by dynamic tests and signal processing, and can be used to make an approach to predicting yarn end breakage. A relative energy feature is defined for evaluating the tendency of yarn end breakage, and its effectiveness is verified by on-line monitoring tests in the laboratory. The research results show that the proposed dynamic fault model has not only an advantage in indicating the presence of fault characteristics, but also great potentials in quantitating fault in on-line spinning monitoring.展开更多
于2010年5月、7月、8月和10月对桑沟湾筏式养鲍区的沉积环境进行现场调查,采用挪威海洋研究所建立的鱼类养殖环境监测系统模型(Modelling-Ongrowing fish farms-Monitoring,MOM system),应用MOM-B着重对鲍养殖区的沉积环境状况进行监测...于2010年5月、7月、8月和10月对桑沟湾筏式养鲍区的沉积环境进行现场调查,采用挪威海洋研究所建立的鱼类养殖环境监测系统模型(Modelling-Ongrowing fish farms-Monitoring,MOM system),应用MOM-B着重对鲍养殖区的沉积环境状况进行监测和评价,由生物、化学和感官指标组组成。生物指标组的结果显示,各站位都有大型底栖动物,鲍养殖区处于1,2或者3等级。根据化学指标组(pH值和氧化还原电位Eh)和感官指标组(颜色、气味、气泡、粘稠度等)的监测结果进行了进一步的评价,结果显示,各站位的pH>7.0,为弱碱性,沉积物都无气泡产生,无臭味或硫化氢气味。鲍养殖区的沉积环境状况整体良好,5月和7月为1级,8月和10月为2级。虽然鲍养殖区目前的沉积环境状况较好,但需要注意的是8月和10月Eh<0,沉积环境已经处于还原状态,可能与鲍养殖压力有关。展开更多
通信网络是输电线路在线监测系统的重要组成部分,关系到监测数据的完整性和安全性。由于现行通信网络在实际监测中的数据通信效果并不理想,吞吐量较低且丢包率较高,通信网络性能存在一定缺陷。为解决这一问题,文章提出基于5G的输电线路...通信网络是输电线路在线监测系统的重要组成部分,关系到监测数据的完整性和安全性。由于现行通信网络在实际监测中的数据通信效果并不理想,吞吐量较低且丢包率较高,通信网络性能存在一定缺陷。为解决这一问题,文章提出基于5G的输电线路在线监测通信网络设计。利用5G技术来设计输电线路在线监测的通信网络模型和信道,同时基于开放式系统互连(Open System Interconnect,OSI)参考模型来设计通信网络协议,从而完成基于5G的输电线路在线监测通信网络的整体设计。经实验验证,所设计的通信网络吞吐性能良好,丢包率在1%以下,输电线路在线监测通信效果良好。展开更多
The creation of a suitable wide area monitoring system(WAMS) is widely recognized as an essential aspect of delivering a power system that will be secure,efficient and sustainable for the foreseeable future. In Great ...The creation of a suitable wide area monitoring system(WAMS) is widely recognized as an essential aspect of delivering a power system that will be secure,efficient and sustainable for the foreseeable future. In Great Britain(GB), the deployment of the first WAMS to monitor the entire power system in real time was the responsibility of the visualization of real time system dynamics using enhanced monitoring(VISOR) project. The core scope of the VISOR project is to deploy this WAMS and demonstrate how WAMS applications can in the near term provide system operators and planners with clear, actionable information. This paper presents the wider scope of the VISOR project and the GB wide WAMS that has been deployed. Furthermore, the paper describes some of the WAMS applications that have been deployed and provides examples of the measurement device performance issues that have been encountered during the project.展开更多
文摘In this paper, a dynamic fault model is proposed to predict yarn end breakage in the spinning procedure through investigation of fault characteristics. In view of the principle that uniformity bad in raw material causes instable yarn formation, the investigation focuses on the fault characteristic existing in the dynamic tension. Analyzing the dynamic spinning system, the phenomenon of over random shock in a spinning triangle is discovered to be the main physical event prior to yarn end breakage. The fault characteristic is further confirmed by dynamic tests and signal processing, and can be used to make an approach to predicting yarn end breakage. A relative energy feature is defined for evaluating the tendency of yarn end breakage, and its effectiveness is verified by on-line monitoring tests in the laboratory. The research results show that the proposed dynamic fault model has not only an advantage in indicating the presence of fault characteristics, but also great potentials in quantitating fault in on-line spinning monitoring.
文摘于2010年5月、7月、8月和10月对桑沟湾筏式养鲍区的沉积环境进行现场调查,采用挪威海洋研究所建立的鱼类养殖环境监测系统模型(Modelling-Ongrowing fish farms-Monitoring,MOM system),应用MOM-B着重对鲍养殖区的沉积环境状况进行监测和评价,由生物、化学和感官指标组组成。生物指标组的结果显示,各站位都有大型底栖动物,鲍养殖区处于1,2或者3等级。根据化学指标组(pH值和氧化还原电位Eh)和感官指标组(颜色、气味、气泡、粘稠度等)的监测结果进行了进一步的评价,结果显示,各站位的pH>7.0,为弱碱性,沉积物都无气泡产生,无臭味或硫化氢气味。鲍养殖区的沉积环境状况整体良好,5月和7月为1级,8月和10月为2级。虽然鲍养殖区目前的沉积环境状况较好,但需要注意的是8月和10月Eh<0,沉积环境已经处于还原状态,可能与鲍养殖压力有关。
文摘通信网络是输电线路在线监测系统的重要组成部分,关系到监测数据的完整性和安全性。由于现行通信网络在实际监测中的数据通信效果并不理想,吞吐量较低且丢包率较高,通信网络性能存在一定缺陷。为解决这一问题,文章提出基于5G的输电线路在线监测通信网络设计。利用5G技术来设计输电线路在线监测的通信网络模型和信道,同时基于开放式系统互连(Open System Interconnect,OSI)参考模型来设计通信网络协议,从而完成基于5G的输电线路在线监测通信网络的整体设计。经实验验证,所设计的通信网络吞吐性能良好,丢包率在1%以下,输电线路在线监测通信效果良好。
基金supported by the GB Network Innovation Competition(NIC)
文摘The creation of a suitable wide area monitoring system(WAMS) is widely recognized as an essential aspect of delivering a power system that will be secure,efficient and sustainable for the foreseeable future. In Great Britain(GB), the deployment of the first WAMS to monitor the entire power system in real time was the responsibility of the visualization of real time system dynamics using enhanced monitoring(VISOR) project. The core scope of the VISOR project is to deploy this WAMS and demonstrate how WAMS applications can in the near term provide system operators and planners with clear, actionable information. This paper presents the wider scope of the VISOR project and the GB wide WAMS that has been deployed. Furthermore, the paper describes some of the WAMS applications that have been deployed and provides examples of the measurement device performance issues that have been encountered during the project.
