基于“蓝牙”通信的便携式物流信息采集器

针对阻碍现代物流发展的物流信息采集问题，充分利用二维条码的性能优点和蓝牙技术的独特优势，综合运用二维条码技术、蓝牙技术、数字成像技术、微控制器技术、闪速存储器技术、液晶显示技术和触摸屏技术，设计并开发了适应现代物流运行需要的便携式物流信息采集器。有效地解决了物流信息的采集问题，实现了一种无纸化的便携式物流信息采集方法。     

提供快速、高效的二维条码识别方案

条码在PCB的生产中具有不可替代的作用，而二维条码因为其更小的体积和更好的容错性能正越来越多的被应用于PCB的识别和追溯中。而Lector620（图1）作为SIcK公司最新开发的新一代二维条码阅读器，以其卓越的性能为电子行业PCB二维条码识别提供非常完美的解决方案。     

电子邮票与邮政协同式生产集成平台设计

为实现现代邮政行业的物流信息化，首次提出了面向物流信息化的电子邮票系统，对基于电子邮票的邮政协同式生产集成平台进行了设计，包括电子邮票系统总体技术框架、系统集成框架、系统运行模式和基于电子邮票的邮政协同式生产集成平台框架；就如何建立基于二维条形码技术的电子邮票物流信息化模型、基于新型密码算法的电子邮票网络销售模型、能实现自动称重计费的软件秤模型和物流配送优化调度层次模型等系统关键技术进行了分析。基于电子邮票的邮政协同式生产集成平台顺应了邮政企业信息化战略，有助于物流信息化和邮政物流全网协同式生产的实现，为其提高服务能力、参与电子商务物流配送等提供了条件和技术保障。     

消息

日前,深圳市人民代表大会与政治协商会议如期举行。同往届不同的是本届会议采用了基于中国矽感CM二维条码的两会身份信息系统。此次两会使用的是深圳矽感科技有限公司独立研发的条码与展会登记系统。无论是二维条码的码制,还是二维条码的识读设备,整个系统从研发到生产都是由矽感科技独自完成的,是不折不扣的中国技术。在以往会议登记系统中,使用的是美     

基于Reed-Solomon码的Data Matrix条码纠错研究

为了研究Data Matrix条码的纠错能力,首先介绍了Data Matrix条码的特点和Reed-Solomon码的基本概念;接着研究了Reed-Solomon码在DataMatrix二维条码中的应用,重点分析了Data Matrix二维条码中Reed-Solomon编、解码的基本原理与步骤,并用C语言实现它的编、解码算法;最后对Reed—Solomon码的纠错能力进行了测试。实验结果表明,Data Matrix二维条码采用Reed—Solomon码作为纠错码,可以有效地排除干扰并进行纠错。     

条码应用技术讲座

本讲座共分四讲，以条码技术在数据采集系统中所涉及到的一些技术问题为主，并以机械工业自动化、汽车制造业和仓储物流管理等几个条码技术的主要应用领域为例，将条码应用技术介绍给读者。     

条码应用技术讲座

本讲座共分四讲，以条码技术在数据采集系统中所涉及到的一些技术问题为主，并以机械工业自动化、汽车制造业和仓储物流管理等几个条码技术的主要应用领域为例，将条码应用技术介绍给读者。     

二维条码识别算法研究

本文以应用最广泛的PDF417二维条码为例,在对条码符号结构及编码原理研究的基础上,探讨完成二维条形码识别的软件算法实现。整个识别算法由图像预处理、图像校正和译码三部分组成。实验结果验证该方法有效,软件识别系统性能稳定,为二维条码的识别提供了一条有效的途径。     

实现物流作业工序的最佳化

物流作业的两个核心点，一是作业精准，二是遵守货物配送的时间。坐落在德国Guetersloh的Arvato股份公司相信，通过该公司实施的解决方案能够使物流作业的这两个核心点实现最佳化：该方案是基于图像加工处理的条码识读器。该公司使用的两台Dataman500型条码读器使用Hotbars条码识读软件，可使物流包裹可靠迅速的抵达目的地。     

实现物流作业工序的最佳化

物流作业的两个核心点，一是作业精准，二是遵守货物配送的时间。坐落在德国Guetersloh的Arvato股份公司相信，通过该公司实施的解决方案能够使物流作业的这两个核心点实现最佳化：该方案是基于图像加工处理的条码识读器。该公司使用的两台Dataman 500型条码识读器使用Hotbars条码识读软件，可使物流包裹可靠迅速地抵达目的地。     

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.     

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.