人工气候室专家系统的多传感器管理

人工气候室参数自动测试和智能化信息处理是实现人工气候室现代化管理的重要手段，介绍了人工气候室专家系统的基本组成，提出了专家系统的多传感器管理问题，论述了该系统的多传感器管理目标、管理内容和管理功能，为系统的数据融合与控制决策奠定了基础。     

基于CAN总线的人工气候室自动测试专家系统

人工气候室参数自动测试和智能化信息处理是实现人工气候室现代化管理的重要手段,本文介绍了基于CAN总线的人工气候室自动测试专家系统的基本组成,讨论了系统的工作原理与特点、硬件结构和软件流程.实际应用表明,这种自动测试专家系统能够实时检测植物生长的各种状态参数,因而具有广泛的应用前景.     

基于CAN总线的人工气候室自动测试专家系统的串行通信

人工气候室参数自动测试和智能化信息处理是实现人工气候室现代化管理的重要手段，介绍了基于CAN总线的人工气候室自动测试专家系统的基本组成，讨论了VB的MSCOMM通信控件，详细说明了系统的CAN总线的通信方式和通信特点以及通信软件设计方法。     

基于PLC和MCGS的人工气候室调控系统设计

本文的人工气候室调控系统是以PLC为核心,辅以I/O设备组成的检测系统,加上MCGS实时监测画面。该检测系统具有数据采集、数据处理、数据输入和输出的功能。该系统可以调控温度、湿度、光照强度、以及CO2浓度等参数,实现了人工气候室的自动化控制,使气候室中的各种参数达到人们预期的效果,为人工气候室的进一步推广与应用提供了更加完善的技术。     

人工气候室的温度控制策略研究

针对人工气候室温度控制中的大滞后、惯性、不确定性等问题,研究了它的控制策略,并应用新型的免疫控制器,实现了人工气候室的温度调节,解决了人工气候室的大滞后、惯性、不确定性等问题,使得人工气候室温度控制的过渡过程,实现了较小的超调和较快的响应速度.     

人工气候室自动测试专家系统主站软件可靠性设计

人工气候室参数自动测试和智能化信息处理是实现人工气候室现代化管理的重要手段．系统主站软件可靠性设计是系统设计的关键技术．论述了主站软件可靠性设计的必要性，提出了主站软件的可靠性设计原则。介绍了主站软件可靠性设计的方法．     

人工干旱环境气候室的研制

干旱是影响植物生长发育最主要的逆境因子,但由于气候因素的复杂性和不可重现性,使得在自然环境下定量研究气候要素对植物的效应及植物对干旱环境的适应相当困难。所以,人工模拟自然气候环境就成为一种理想的科研技术手段。本文介绍的人工干旱环境气候室以模拟西北干旱半干旱地区植物生理生态科学研究的需要选定技术指标,通过对国内外各类型气候室技术方案和设备的调研比较,综合集成自动控制、传感器和测量、计算机和网络通讯等先进的理论和技术,自主研制和消化吸收相结合,并经过科研实验的检测,研制出了可模拟温度、湿度、光照和CO2浓度4个主要环境因素的科研型高精度人工干旱环境气候室。其测控精度已经在运行实践中得到检验,为西北干旱半干旱地区植物生理生态领域的科学研究提供了先进的科研条件。     

人工气候室智能测试专家系统的设计与实现

提出了人工气候室测试的疏失误差别除和数据挖掘方法,在此基础上设计的人工气候室智能测试专家系统、具有稳定性好、灵敏度高、响应速度快、使用寿命长等特点。系统具有广泛的应用前景。     

人工气候室智能监控系统设计

针对人工气候室这样一个复杂非线性系统．应用电子计算机技术．网络通信技术，采用控制理论的研究成果．设计出一套能很好地控制温度、湿度，光照度等主要气候参数的智能监控系统。实际运行效果表明该系统工作可靠性高，操作方便．稳态精度高。     

室内园艺环境控制系统

1.序自然环境中所从事的农业生产,其产量和质量等都受到季节及气候的影响。鉴于这一点,近来通过园艺室的人工环境控制使农作物达到了稳定生产。过去,大多采用单功能控制设备的园艺室。通过研究植物活体,控制和管理温度、湿度、CO_2浓度,加快了植物的栽培。富士电机应用计测技术、传感器技术、电     

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.