SYNTHESIS OF GUIDED CHAIN DRIVE MECHANISM WITH LINKAGE

ＳＹＮＴＨＥＳＩＳＯＦＧＵＩＤＥＤＣＨＡＩＮＤＲＩＶＥＭＥＣＨＡＮＩＳＭＷＩＴＨＬＩＮＫＡＧＥＳｈａｎＢａｏｚｈｏｎｇＷｕＫｅｙｏｎｇＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈａｎｉｃｓＷａｎｇＹｉｘｉｎｇＣｈｅｎＥｎ...     

ANALYSIS OF FAILURE MECHANISM IN MULTIPLE DISC WET BRAKES

ＡＮＡＬＹＳＩＳＯＦＦＡＩＬＵＲＥＭＥＣＨＡＮＩＳＭＩＮＭＵＬＴＩＰＬＥＤＩＳＣＷＥＴＢＲＡＫＥＳ①ＳｕｎＤｏｎｇｙｅＱｉｎＤａｔｏｎｇＹａｎｇＹａｌｉａｎ（ＣｈｏｎｇｑｉｎｇＵｎｉｖｅｒｓｉｔｙ）ＷａｎｇＹｕｘｉｎｇ（ＳｈａｎｄｏｎｇＩｎｓｔｉｔｕ...     

机器人化柔性自动坐标测量系统的研究

本文建立了由ＣＡＤ技术、计算机视觉技术和计算机辅助检测规划（ＣＡＩＰ）技术与数控坐标测量机（ＣＮＣ－ＣＭＭ）集成形成的机器人化柔性自动坐标测量系统（ＲＦＡＣＭＳ）。ＲＦＡＣＭＳ将计算机视觉和ＣＡＩＰ引入ＣＮＣ－ＣＭＭ,极大地提高了ＣＮＣ－ＣＭＭ的柔性化和自动化程度;利用ＣＡＤ数据库中的工件信息,是ＲＦＡＣＭＳ集成到柔性制造系统（ＦＭＳ）或计算机集成制造系统（ＣＩＭＳ）的基础。文中给出了ＲＦＡＣＭＳ     

DISCUSSING ON SOLID ABRASIVE LAPPING PATH

ＤＩＳＣＵＳＳＩＮＧＯＮＳＯＬＩＤＡＢＲＡＳＩＶＥＬＡＰＰＩＮＧＰＡＴＨＹａｎｇＪｉａｎｄｏｎｇ，ＷｅｎＸｕｅｈｅｎｇＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈａｎｉｃｓＺｈｕＹａｎｑｉｕ，ＷａｎｇＬｉｊｉａｎｇＪｉｌ...     

OPTIMAL CONTROL PRINCIPLE OF PROFILE ERRORS FOR MACHINING OF CYLINDER CAM

ＯＰＴＩＭＡＬＣＯＮＴＲＯＬＰＲＩＮＣＩＰＬＥＯＦＰＲＯＦＩＬＥＥＲＲＯＲＳＦＯＲＭＡＣＨＩＮＩＮＧＯＦＣＹＬＩＮＤＥＲＣＡＭＺｈａｎｇＹｉｔｏｎｇ，Ｌｕｌｉｎｇ，ＹｉｎＭｉｎｇｆｕ，ＹａｎｓｈａｎＵｎｉｖｅｒｓｉｔｙＳｈａｎｄｏｎｇＥｎｇｉｎｅｅｒ...     

NEW MECHANISM OF LIMITED-SLIP DIFFERENTIAL

ＮＥＷＭＥＣＨＡＮＩＳＭＯＦＬＩＭＩＴＥＤ－ＳＬＩＰＤＩＦＦＥＲＥＮＴＩＡＬ￥ＺｈａｎｇＳｈｅｍｉｎ；ＬｕｏＨｏｎｇｔｉａｎ（Ｘｉ＇ａｎＪｉａｏｔｏｎｇＵｎｉｖｅｒｓｉｔｙ）Ａｂｓｔｒａｃｔ：Ａｃｃｏｒｄｉｎｇｔｏｐｒｏｐｅｒｔｙｒｅｑｕｉｒｅｍｅｎ...     

RESEARCH ON BEHAVIORS OF ELECTRORHEOLOGICAL FLUID-BASED SEMIACTIVE ROBOT FINGERTIPS

ＲＥＳＥＡＲＣＨＯＮＢＥＨＡＶＩＯＲＳＯＦＥＬＥＣＴＲＯＲＨＥＯＬＯＧＩＣＡＬＦＬＵＩＤＢＡＳＥＤＳＥＭＩＡＣＴＩＶＥＲＯＢＯＴＦＩＮＧＥＲＴＩＰＳ①ＹｕｅＨｏｎｇＬｉＴｉｅｊｕｎＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｒｉｎｇ,Ｈ...     

测量准确度与测量仪器准确度

国际标准化组织（ＩＳＯ）、国际电工委员会（ＩＥＣ）、国际法制计量组织（ＯＩＭＬ）、国际计量局（ＢＩＰＭ）、国际纯物理和应用物理联合会（ＩＵＰＡＰ）、国际纯化学和应用化学联合会（ＩＵＰＡＣ）以及国际临床化学联合会（ＩＦＣＣ）７个国际组织于１９９３年修订了《国际通用计量学基本术语》（ＩｎｔｅｒｎａｔｉｏｎａｌＶｏｃａｂｄｎｙｏｆ　Ｂａｓｉｃａｎｄ　ＧｅｎｅｒａｌＴｅｒｍｓｉｎＭｅｔｒｏｌｏｇｙ）（以下简称《ＶＩＭ》）。我国国家质量技术监督局于１９９８年９月发布ＴＪＪＦ１００１－１９９８《通用计量术语…     

同位素稀释质谱用子化学计量溯源性的探索与研究

自从六十年代国际上实现了物理量量值的溯源,由此为化学计量的溯源提供了物理基础与实践经验。由子化学测量及化学成份量的多样性与复杂性,目前实现化学计量溯源还面临着一些理论与实践问题。建立国际化学成份量的溯源体系（该体系包括组织严密的机构和网络,传递有效的基、标准物质和可靠的分析方法。）实现化学成份量的溯源是摆在世界各国科学工作者面前有待研究开拓解决的跨世纪课题。１９９３年国际计量委员会（ＣＩＰＭ）化学计量工作组（ＷＧｏｎＭｅｔｒｏｌｏｇｙｉｎＣｈｅｍｉｓｔｒｙ）首先组织了同位素稀释质谱（ＩＤＭＳ）国…     

OPTIMAL DYNAMIC LOAD DISTRIBUTION OF MULTIPLE COOPERATING ROBOT MANIPULATORS

ＯＰＴＩＭＡＬＤＹＮＡＭＩＣＬＯＡＤＤＩＳＴＲＩＢＵＴＩＯＮＯＦＭＵＬＴＩＰＬＥＣＯＯＰＥＲＡＴＩＮＧＲＯＢＯＴＭＡＮＩＰＵＬＡＴＯＲＳ￥ＺｈａｏＹｏｎｇｓｈｅｎｇ；ＨｕａｎｇＺｈｅｎ；ＧａｏＦｅｎｇ（ＹａｎｓｈａｎＵｎｉｖｅｒｓｉｔｙ）Ａｂｓｔｒａ...     

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.     

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....     

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。     

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.