一种卷缆控制阀组的设计

为解决某电牵引车卷缆液压系统安装空间狭小、调节和维护不方便的问题,在已有卷缆阀和卷缆调节阀组的基础上,设计了卷缆控制阀组。实际使用表明该阀组能够满足卷缆液压系统的要求,具有集成度高,便于调节维护的特点。     

隧道悬臂掘进机卷缆系统的优化设计

针对在工业性试验中出现放缆不畅、卷缆装置底板损坏的问题，分析了故障原因，基于螺纹插装阀和电磁换向阀技术，设计了一种悬臂掘进机自动收放缆的卷缆系统，并进行了卷缆系统参数计算及优化。实际生产应用结果表明：摆线马达启动扭矩压差1 MPa、减速机减速比改为20、取消背压溢流阀，卷缆系统可以安全可靠的进行收放缆工作；增加卷缆装置安装底板数量及螺栓防松，完全实现可靠的无人化自动卷缆。为研发隧道悬臂掘进机卷缆系统提供一定的理论依据及实践支持。     

悬索桥主缆紧缆机的研究与开发

本文主要介绍了一种轻便型紧缆机的结构形式,工作原理以及该紧缆机在研究开发中的一些注意事项。     

平行四主缆悬索桥跨缆起重机设计

针对某主跨超2 000米级悬索桥平行四主缆设计方案，通过对跨缆起重机进行功能需求分析和多种设计方案对比分析，提出了一种适应四主缆受力特点的新型跨缆起重机以实现加劲梁吊装。起重机采用自适应左右幅并置双主缆架设误差的承载结构、跨越并行索夹的行走机构、对称于主缆的提升系统、轻量化主桁架等设计。同时阐述了动力系统及集成控制系统原理设计，可为类似悬索桥建设提供借鉴。     

有关ADSS光缆施工探索

ADSS自承式电力特种光缆天生具有的各项优势使得它在电力系统各级通信主干网和支线网络中得到了大规模的应用。因此，本文重点分析了当前ADSS光缆在施工前、施工中的一系列内容，从而为今后其他ADSS光缆的施工奠定了坚实的基础，最终促进了我国电力通信行业的长远发展。     

大型储缆筐结构设计及圆周应力分析方法研究

在海洋油气开发工程项目中，大型储缆筐是装载柔性管缆的重要装备，其多为固定式结构，安装在工程船舶上，但一些船舶自身配备的储缆筐装载能力不足，需要加装临时储缆筐，以满足项目需求。文中针对某一工程船开展了大型储缆筐的结构设计研究。基于理论分析及SACS有限元软件，提出了一种圆周应力分析方法，计算分析了多层圆周分布荷载，按照规范校核了内外护栏的结构强度，并优化了储缆筐的结构设计，最终形成了一套大型储缆筐结构设计方法，为同类型储缆筐的结构设计提供指导。     

门座起重机交替吊运作业中储缆桶的研制

介绍了门座起重机交替吊运煤炭与集装箱作业新工艺中储缆桶的研制与应用,阐述了集装箱作业模式和煤炭作业模式,给出了储缆桶电缆系统的组成及各部分连接。     

工频感应电炉水电缆交换器的改造

介绍重型铸造厂工频感应电炉水电缆交换器改造及应用，解决交换器经常损坏这一难题。     

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.