基于综合监控系统数据的城市地铁3D运维平台应用研究

通过对综合监控系统(ISCS)与BIM技术相结合的研究及对福州地铁1号线综合监控系统数据进行转换处理,为3D运维平台提供数据支撑;初步实现了地铁运营数据的再利用,并应用于地铁运营管理;同时给地铁资产可视化管理、应急指挥决策提供了便利条件。     

轨道交通综合监控系统用户与权限管理功能的设计与实现

针对城市轨道交通综合监控系统(简称ISCS)用户与权限管理的需求,基于对综合监控系统的用户画像分析,提出一种基于"用户-用户组-权限"的用户与权限设计方法,通过对综合监控用户画像、综合监控权限、用户及权限管理等进行分析,介绍了主要功能的实现机制。模型设计简洁易懂,具有易实现和高可靠的优点,对轨道交通及其他类似工程有一定的借鉴意义。     

地铁智慧车站的应用

近年来,各地地铁建设步伐加快,地铁开通运营线路越来越多,而地铁车站涵盖系统繁多,车站管理人员要同时关注多个系统运行状况,极易出现失误.智慧车站以ISCS为基础,与车站的其他专业系统互联,采集各系统信息,通过计算机网络技术、大数据采集及分析、智慧运维、物联网等技术,实现对全站大部分重要设备的集中监控展示.智慧车站可提供一键开关站、智慧安检、物资管理、全景感知等功能.智慧车站的建设可以极大地减少地铁运营成本,提高工作效率.     

基于城轨云的城市轨道交通综合监控系统维修管理子系统设计

综合监控系统是根据轨道交通线路特点和技术发展情况量身定制的大型综合自动化项目,使用综合监控系统能够实现城市轨道交通信息互通、资源共享,并提升城市轨道交通运营的自动化水平以及安全性、可靠性、响应性,达到减员增效的目的。基于城市轨道交通综合监控系统维修管理模式,介绍了综合监控系统维修管理子系统的硬件构成、软件构成、功能实现以及主要流程,希望能为相关研究提供参考。     

福州地铁1号线综合监控系统分段开通实施方案

近年来轨道交通发展越来越迅速,在施工过程中分段、分期开通的需求越来越普遍,地铁线路分段开通必然会对既有线路运营造成影响。综合监控系统集成和互联子系统较多,在分段、分期开通过程中接口调试、系统联调、网络和系统贯通问题日趋突出,通过分析地铁综合监控系统分段开通难点和重点,结合现场施工、网络结构、系统平台给出了详细的方案,并对贯通过程中的问题提出了优化方案和措施,为其他线路的建设提供参考和借鉴。     

贵阳轨道交通1号线BAS组网方案的分析

介绍了利用单环以太网组网方案的环境与设备监控系统(BAS)在贵阳轨道交通1号线的应用,分析此种BAS系统结构、设备组成、组网方案与综合监控系统(ISCS)接口处理方案等系统相关特性;并且通过对不同组网方案的特性比较,对后续地铁BAS的设计具有一定的参考价值。     

城市轨道交通综合监控系统数据库部署及服务器配置方案研究

城市轨道交通项目中综合监控系统的建设,依据线路特点、技术发展水平、运营管理技术水平及需求,在数据库部署及服务器配置方面有不同的方案实践,各方案均有其不同的侧重点及优缺点,对各方案进行归纳和总结,为综合监控系统的工程设计提供设计思路和方法。同时提出了基于服务器虚拟化技术的服务器配置方案,为云计算在城市轨道交通综合监控系统中的应用提出了新的思路。     

深圳地铁三号线综合监控系统的特点

简单介绍深圳地铁三号线综合监控项目的内容,综合监控系统的意义,系统中群组监控、后备线控车站、集中维护的管理平台、分布式软件架构、模块化软件设计、联动等多种控制方式和多系统信息共享等特点,并根据项目特点及运营信息化需求,简述综合监控系统的发展趋势。     

城市轨道交通线网级视频监控系统方案的研究与实现

如今国内城市轨道建设如火如荼,大部分城市地铁线路的建设及运营状态已从单一线路到线网化阶段。然而,各大城市轨道交通视频监控系统在线网建设初级阶段,基本各线路独立建设,线路之间视频监控系统少有做到互联互通。在旧线运营与新线建设同期进行的模式下,如何规划线网级视频监控系统方案,为便利实现旧线及后期新线互联互通已迫在眉睫。以视频监控系统为研究对象,以实际工程案例为载体,提出了线网级视频监控系统的方案。     

浅谈综合监控系统的智能化应用及发展前景

当前城市轨道交通正处于大规模高速发展时期,综合监控系统广泛应用于城市轨道交通行业,它集成了多个自动化专业子系统,并在集成平台支持下对各专业进行统一监控,实现各专业系统的信息共享及系统之间的联动控制功能,提高了城市轨道交通运营效率,为实现城市轨道交通现代化运营管理提供了信息化基础。现就轨道交通综合监控系统的智能优化和发展前景作简要阐述。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.