基于Java的Jess功能函数扩展方法

对于Jess语言中没有的功能函数,提出通过Java实现Jess的Userfunction接口来创建,进而达到扩展Jess语言功能函数的目的。该文从Jess提供的Userfunction接口入手,分析了Jess函数调用语句与Userfunction接口方法 call参数之间的内在联系,抽取转换Jess函数的参数到Java环境中并进行处理,最终将处理结果转换并返回到Jess中。此方法被应用到基于RCM的压缩机检修策略的决策研究开发中。     

Java 在测试系统接口中的应用

Java的平台无关性等特点,使其适于开发测试系统接口软件。分析了Java的特点,用Java提供的类库,设计了一种基于Java的简单测试系统,实现接口功能。验证了在测试系统接口中应用Java的可行性。     

使用C++完成OPC客户端与DCS数据交换的研究与应用

介绍使用Visual C++.net利用OPC规范完成与艾默生Ovation DCS服务器数据交换的步骤,完成了数据交换类的各项功能函数,实现了上位机与DCS之间的同步数据采集与写入。提供的代码具备很强的通用性,可以很好地复用至其他的现场设备接口编码。     

基于信号命令的IVI信号驱动技术研究

提出了基于信号命令的仪器可互换解决方案,定义了信号驱动器的接口规范,按照上述规范实现了基于信号命令的仪器驱动器,实际使用表明该信号驱动器具有很强的扩展能力和仪器可互换性.     

基于MTK平台的叶绿素检测仪开发

利用华禹旋风001MTK手机开发模块作为主控设备实现叶绿素仪的硬件开发.MTK手机平台采用Nucleus嵌入式实时操作系统,集成了ARM处理器、GPRS Modem等,并且还提供了总线扩展接口,比如并口、串口等.本文通过JNI实现Java 控制硬件,在MTK的Java平台下使用低级UI(User Interface)编写仪器的配套程序,实现了对硬件的控制、数据和图像的采集、数据的存储和浏览等功能.MTK平台的高度集成性和稳定性为开发工作创造了一个高效、稳定的平台.基于MTK平台的拍照功能,在获取植物叶片SPAD值的同时,还可拍摄对应的叶片或植株的照片,从而有助于对作物的形态参数、氮素营养成分及病虫害信息进行综合对比分析.     

基于Jess的构件化机床故障诊断专家系统的设计与实现

本文针对专家系统开发方面存在的不足,利用专家系统工具Jess(Java expert system shell)进行核心推理模块的开发,并使用Java语言进行专家系统整体网络框架的构建和系统构件化的实现,成功地开发出了具有可扩展性、替换性的数控机床故障诊断专家系统.     

AutoCAD图形输出为位图命令的改进

AutoCAD的Export命令在将图形文档输出为位图格式时,只能将整个文档窗口保存为位图文件,利用W indowsAPI函数、AutoCAD事件驱动消息和V isual Basic语言对其进行了功能改进和扩展,可以根据用户的参数选择来存储整个图形文档窗口的图形或指定区域的图形。     

基于WinCE流接口模型的设备驱动设计

为提高嵌入式系统的适应性,根据WinCE．NET下流接口驱动模型结构、流接口驱动加载机制特点,借助WinCE．NET下USB设备驱动框架,设计出USB软驱驱动程序,并给出USB软驱的格式化实现方法和完整步骤。此驱动程序已成功应用在基于ARM9的嵌入式区域水质监测站系统,从而扩展了系统的功能,并为其他外设驱动设计与实现提供参考。     

基于事物特性表的标准件库建立

提出基于事物特性表的标准件库建立。采用数据库查询技术,参数化绘图技术及扩展实体数数据功能完成。人机界面友好,可实现数据库浏览,预览标准件图形仅输入标准件的公称尺寸绘制标准件。该标准件库不但实现标准件库的标准化且易于扩充,而且利用扩展实体数据功能为标准件加载信息,从而能够实现装配设计中对标准件的整体识别。     

基于CATIA的杠杆加载系统参数化设计方法

为了在CATIA上创建杠杆加载系统组件库,实现根据连接关系自动生成杠杆加载系统及相关调整功能,在研究组件库创建、调用过程的基础上,提出基于CAA技术的组件参数化建模方法,使用RADE技术开发了相应可视化建模软件.应用实例表明,软件界面友好,操作简单,只需输入杠杆布置基本参数和数据文件,即可完成杠杆加载系统的参数化建模,实现了杠杆加载系统参数化设计与方案展示.     

基于Jess的HVAC温度控制仿真系统

针对HVAC的温度控制,设计HVAC温度控制仿真模型,在Eclipse软件平台上,运用Jess和Java语言,搭建温度控制仿真系统,编写基于规则的逻辑推理控制算法,实现HVAC楼层温度的仿真控制。具体仿真实验测试结果表明,该仿真系统的运行是正确和高效的,对HVAC实际温度控制系统的开发有一定的参考价值。     

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...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.