基于GPRS技术的仓库监控系统

文中介绍了一种采用GPRS无线网络和Internet网络结合仓库自动控制技术的监控管理系统。该系统具有良好的扩展性,可实现分级监控。在仓库自动检测点和监控中心站之间利用GPRS无线网络,实现了多个监控、移动监控。     

坦克车载蓄电池智能监控与维护系统设计

针对车载电池存在的自放电现象,影响车辆整体工作性能问题,研制一种车载蓄电池智能监控与维护系统,实现对车载蓄电池进行自动检测、远程监控和智能维护,从而提高装备的完好性能。     

基于GPRS技术的药品仓库监控系统

介绍一种采用现有GPRS无线网络和Internet网络结合无人仓库自动控制技术的监控管理系统。系统具有良好的扩展性,可实现分级监控。在仓库自动检测点和监控中心站之间利用GPRS无线网络,实现了多个监控、移动监控。相较于其他相关的网络检测技术,系统配置灵活多变的特点可广泛应用于无人职守或条件较差的场所,其经济性和易实现性是具有工程应用的潜力。应用实例的试验说明了系统的有效性。     

采煤机异常检测及预警管理系统的研究

针对采煤机在高尘、高湿、高冲击载荷作用下工作出现异常情况的问题,分析一种采煤机运行状态自动监控、异常工况自动检测、自动报警的综合管理系统。该系统利用模糊监控原理,对采煤机运行过程中的关键参数进行检测和对比,对采煤机运行状态进行实时监测。根据实际应用表明,该异常检测及预警管理系统具有稳定性高、可靠性好的优点,提升了采煤机井下综采作业的稳定性。     

工业无线通信技术第六章基于无线通信技术的温室自动化监控系统

文章介绍了一种先进的温室自动化监控系统，该系统应用无线传感器网络技术和以太网技术对温室中各环境因素进行自动检测、信息处理与实时控制。还介绍了系统的组成和功能，详细描述了系统的软硬件平台，最后总结了该监控系统的特点。     

PLC在钢球表面检测系统中的应用

开发了一套基于PLC的钢球表面自动检测系统,详细阐述了该系统的工作原理,并设计了PLC控制系统。该系统结构合理,工作安全可靠,能够实现无人监控操作。     

基于PIC16F877的飞机迎、侧角自动检测系统

基于单片机PICl6F877设计成功了某型飞机的迎、侧角自动检测系统。文章讲解了检测系统的设计思想和基本工作原理,给出了控制系统的基本硬件电路图。系统能够与PC机进行通信,实现远程监控和检测。     

顺南天然气站自动计量系统设计与实现

针对顺南天然气输配站输气管线计量技术落后的状况，采用MCGS组态软件对各管线进行体积流量算法和补偿，设计脚本程序，开发了对计量点分散计量和集中查询与管理的监控系统，实现了对现场输配情况的自动检测和自动计量，生成报表，提高计量精度，便于天然气产、供、销的运行管理，提高了天然气的利用率。     

广深高速公路视频交通事件自动检测系统研究

详细介绍了广深高速公路视频交通事件自动检测系统(AID)的结构原理和系统组成。通过Citilog事件自动检测系统在高速公路的应用,在现有监控系统的基础上实现了各种功能,并分析了事件自动检测系统所具有的各种优势,以及在高速公路实际应用中取得的良好效果。该系统对于实现高速公路交通事件的自动检测具有重要的实际意义。     

S7-400H及wincc监控系统在沙特延布3000T海水淡化厂应用

以沙特延布水泥厂海水淡化项目为例,从监控系统配置选择、架构搭建、上位机组态等方面进行阐述,开发了一套基于CPU及通讯双冗余的自动化监控系统。该自动化监控系统可对海水淡化工艺设备自动控制、系统运行相关仪表参数自动检测、故障报警处理,具有高自动化、高可靠性,满足用户生产及工艺控制需求。     

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.     

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....     

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。     

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.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.