工业变电站监控软件及其管理组态模块设计

针对工业变电站监控系统做了较详细的分析,针对其特点设计规划了工业变电站监控组态软件系统的总体结构方案,采用VC++作为主要开发手段,对该监控软件系统进行了整体的研究.对监控软件管理组态模块分别进行了分析和介绍.管理组态模块是将对各个模块进行组织和管理,通过一个公共类进行联接,利用主画面作为程序入口,将各个功能衔接.主程序初始化时,调入动态链接文件.管理组态模块由工程管理、安全管理、系统参数组态管理、人员档案管理等的子模块组成,作为重要的管理人机接口,具有高效、直观的特点.     

基于SolidWorks平台的零件级二次开发

为了使国外的商品化三维CAD软件更好地适应国内不同企业的具体使用要求,设计人员往往要对其软件系统进行标准化和本土化的二次开发.CAD系统的二次开发是指由熟悉产品设计和掌握计算机应用技术的人员共同开发出的针对企业特殊功能要求的CAD应用软件.     

人工智能软件系统的非功能属性及其质量保障方法综述

随着神经网络等技术的快速发展,人工智能被越来越多地应用到安全关键或任务关键系统中,例如汽车自动驾驶系统、疾病诊断系统和恶意软件检测系统等.由于缺乏对人工智能软件系统全面和深入的了解,导致系统时常发生严重错误.人工智能软件系统的功能属性和非功能属性被提出以加强对人工智能软件系统的充分认识和质量保障.经调研,有大量研究者致力于功能属性的研究,但人们越来越关注于人工智能软件系统的非功能属性.为此,专注于人工智能软件系统的非功能属性,调研了138篇相关领域的论文,从属性定义、属性必要性、属性示例和常见质量保障方法几个方面对目前已有的研究工作进行系统的梳理和详细的总结,同时重新定义和分析了非功能属性之间的关系并介绍了人工智能软件系统研究中可以用到的开源工具.最后,展望了人工智能软件系统非功能属性的未来研究方向和挑战,以期为该领域的研究人员提供参考.     

油气储罐火灾爆炸风险模拟评估方法研究及软件系统开发

油气储罐由于固有的火灾和爆炸危险性,一旦发生泄漏会导致火灾和爆炸事故的发生,因此研究油气储罐的风险评估方法对于预防和控制事故的发生具有十分重要的意义.随着计算机技术的发展,运用计算机模拟技术模拟危险化学品储罐事故后果,以及对环境的危害过程成为可能.针对油气储罐的火灾爆炸特性,在对现有各种火灾爆炸损伤模型总结分析的基础上,对几种常见事故选择和确定了其模拟数学模型,并开发了火灾爆炸事故评估的软件系统,详细介绍软件系统的功能和组成框架.软件系统由储罐危险源识别系统、火灾爆炸分析评估系统、油气储罐事故预防和控制训练系统和数据库系统组成.该系统可以对事故后果包括危险区域、人员伤害范围、经济损失等进行量化计算和分级,通过对模拟结果的分析与比较可以得剑火灾爆炸事故的等级,软件系统可以完成风险评估,从而大大提高了评估的效率和科学性.     

基于调节函数的一类三角结构非线性系统的自适应滑模控制

针对一类三角结构的非线性系统,基于状态参考自适应控制算法和滑模控制技术,研究了其在非匹配未知参数和不确定性干扰下的跟踪控制问题,提出了自适应滑模控制策略,实现了不确定非线性系统的鲁棒输出跟踪.与一般自适应控制相比,允许系统存在非参数化的不确定性和未知扰动,增强了控制系统鲁棒性.仿真算例证明了理论研究成果的正确性和可行性.     

面向非确定性的软件质量保障方法与技术专题前言

随着互联网、物联网、云计算等新计算平台、新应用模式及智能化等新软件模式的广泛运用,软件系统内外各种来源的非确定性不断增强.从软件系统内部的不确定性来看,并发程序是一类典型的非确定性软件系统.并发程序由于其随机性高的特点,容易导致并发缺陷且难以调试.从软件系统外部的不确定性来看,软件所处的网络环境和所服务的用户需求变得更...     

项目管理中任务时间进度不确定性可视化

项目管理中对任务时间进度不确定性的处理是至关重要的.针对现有项目管理软件不能直观地展现项目任务时间进度不确定性和人员协作的问题,提出使用不确定性字形结合时间线法表示任务时间进度不确定性的可视化方法.首先总结项目任务进度不确定性特点,对影响项目进度的不确定性因素进行详细定义,建立项目进度不确定性模型;然后使用时间线法可视化项目整体流程,设计不确定性可视化字形隐喻任务时间进度不确定性,并为用户提供多种交互手段和多个视图帮助探索分析项目任务进度不确定性和人员协作情况,根据用户的色彩感知偏好提供多种配色方案.以软件开发项目管理为例,在Program Line可视化系统中验证了文中方法的有效性和实用性.     

面向微服务架构的软件系统韧性增强技术研究

软件系统韧性是系统在面对被动故障和主动攻击等挑战时提供和维持可接受的服务水平的能力,被认为是未来互联网的基本设计属性.面对现有补丁式防御手段存在的缺陷,如何增强软件系统的韧性能力引起了安全领域研究人员的广泛关注.结合软件系统微服务化的发展趋势,对微服务架构下软件系统韧性增强技术的研究现状进行了归纳分析,从冗余及多样性、...     

Hadoop在人员定位软件系统中的应用研究

针对现有人员定位系统难以满足大型煤矿大数据量访问需求的问题,提出将Hadoop应用于人员定位软件系统中,利用并行计算模型MapReduce和非关系型数据库HBase实现人员定位数据的并行化访问。Hadoop的应用显著提升了人员定位软件系统的数据处理性能、实时性和可扩展性。     

关联 Lurie 控制大系统的参数绝对稳定性

针对一类具有不确定性参数和参考输入的关联 Lurie 大系统, 研究其参数绝对稳定性的问题, 即同时考虑参数变化引起的平衡点的改变及其稳定性的问题. 首先, 基于分散状态反馈, 研究了当不确定性参数变化和参考输入改变时, 关联 Lurie 大系统参数稳定性存在条件和参数稳定区域. 其次, 给出了在该参数稳定区域中基于矩阵不等式条件的关联大系统稳定性存在的线性矩阵不等式 (LMI) 条件. 最后, 研究了多胞型关联 Lurie 大系统参数绝对稳定性存在的充分条件和求解算法. 仿真例子说明了方法的有效性.     

Cyber-physical systems security: Limitations,issues and future trends

Typically, Cyber-Physical Systems (CPS) involve various interconnected systems, which can monitor and manipulate real objects and processes. They are closely related to Internet of Things (IoT) systems, except that CPS focuses on the interaction between physical, networking and computation processes. Their integration with IoT led to a new CPS aspect, the Internet of Cyber-Physical Things (IoCPT). The fast and significant evolution of CPS affects various aspects in people’s way of life and enables a wider range of services and applications including e-Health, smart homes, e-Commerce, etc. However, interconnecting the cyber and physical worlds gives rise to new dangerous security challenges. Consequently, CPS security has attracted the attention of both researchers and industries. This paper surveys the main aspects of CPS and the corresponding applications, technologies, and standards. Moreover, CPS security vulnerabilities, threats and attacks are reviewed, while the key issues and challenges are identified. Additionally, the existing security measures are presented and analyzed while identifying their main limitations. Finally, several suggestions and recommendations are proposed benefiting from the lessons learned throughout this comprehensive review.     

信息物理融合系统(CPS)研究综述

信息物理融合系统(Cyber-Physical Systcms, CPS)是将计算资源与物理资源紧密结合与协调的产物,它将改变人类与物理世界的交互方式。作为物联网的演进,CPS已经引起了国内外相关科研机构、政府部门和社会的广泛关注。介绍和阐述了CPS的定义、系统结构和特性,重点研究和讨论了CPS的理论技术体系、对计算机科学领域带来的重大挑战以及研究现状,最后展望了CPS的研究动向。     

基于参数区间不确定性分析的无人机辅助物联网鲁棒优化

无人机辅助物联网技术被广泛应用于灾害应急通信中,但物联网设备的通信中存在多种不确定因素。针对位置参数区间存在不确定性的问题,提出了无人机辅助物联网通信的鲁棒优化方法。使用椭球不确定集对地面物联网设备位置参数区间不确定性进行描述,建立了包含不确定性的物联网设备通信鲁棒优化模型,并对模型进行了求解。为提高模型求解的准确性,提出一个有关位置参数区间不确定和椭球误差域之间的相关分析方法,分析了两类不确定因素对物联网设备通信模型的影响程度。以地面物联网设备最优部署和通信最小功率为目的,设计了仿真实验。结果表明,在不确定因素存在时,所提优化模型能有效实现地面物联网设备间的最优部署和通信功率最小化。     

Uncertainty-Wise Cyber-Physical System test modeling

Software and Systems Modeling - It is important that a Cyber-Physical System (CPS) with uncertainty in its behavior caused by its unpredictable operating environment, to ensure its reliable...     

A Hot Event Influence Scope Assessment Method in Cyber-Physical Space For Big Data Application

The increase of scale and complexity of Internet big data presents unprecedented opportunities on Cyber-Physical Systems (CPS). The incompleteness and incredibility of Internet big data are challenging issues for confirming the event influence scope. To solve the above problem, we propose CyberPhysical Space Event Model (CPSEM) to analyze event influence in multi-viewer, which maps real data into Cyber Space (CS) and Physical Space (PS). In addition, we propose Event Influence Scope Detection Algorithm (EISDA) to detect the scope of a hot event in Cyber Space and Physical Space.     

Meta-inventory

In an Industry 4.0 Factory, physical entities such as humans, machines and materials are digitized into digital twins (DT) with smart IoT (Internet of Things) devices resulting in Cyber-Physical Production Systems (CPPS). Real-time data analytics builds up traceability and visibility, not only in the physical domain but also cyber space. This paper adds a new concept of cyber-physical inventory or simply meta-inventory to Industry 4.0 CPPS. In addition to physical items, their digital twins are considered as part of production inventory. Traceability and visibility enabled by digital twin can significantly reduce complexity and uncertainties (e.g. lead times and variability) while achieving resilience in case of major disturbances. The CPPS factory hedges the risks through meta-inventory without incurring cost for holding inventory digitally. After reflecting upon the developments of production inventory management corresponding to the evolutionary history of manufacturing systems to Industry 4.0, the paper presents the meta-inventory paradigm within a simple Industry 4.0 compliant supply chain. The factory, the supplier, and the transport implement a VMI (vendor-managed inventory) strategy. Two well-known basic EOQ (Economic Order Quantity) and EPQ (Economic Production Quantity or production Lot Sizing) problems are extended to demonstrate and quantify the impacts of using meta-inventory on the supply chain and the member enterprise. The analyses allow us to unfold key perspectives in more complex production and supply chain systems for further research.     

A limit to the capability of feedback

Feedback is ubiquitous and is a basic concept in the area of control, where it is used primarily for reducing internal or external uncertainties, or both. In this note, we will study the capability of feedback in dealing with both internal and external uncertainties for a class of pth order nonlinear autoregressive control systems. The size of the uncertainty is described by the Lipschitz constant (say L) of the uncertain nonlinear function in consideration. It is shown that if p and L satisfy a certain inequality, then there exists no globally stabilizing feedback for the corresponding class of uncertain systems, and thus finding a quantitative limit to the capability of the feedback mechanism in dealing with structural uncertainties     

In-process machine vision monitoring of tool wear for Cyber-Physical Production Systems

The monitoring of tool wear in machining process is becoming a crucial element in the modern production systems to predict the tool lifespan, and consequently the ideal point to replace it, still remains a challenge up to now. On the other hand, Cyber-Physical Systems (CPSs) have attracted researchers in many areas, especially in manufacturing, and they are playing a key role in the integration of heterogeneous software and hardware components. In this paper, an in-process machine vision monitoring of tool wear is integrated into a production system based on the CPS approach. Thereby, a methodology of four phases is proposed, whose goal basically is to raise the requirements, validate the integration, develop the decentralized architecture and finally prove the efficiency, robustness, and capabilities that only cyber-physical systems can bring to a production system. The feasibility and effectiveness of the proposed monitoring system for in-process tool wear is validated in a CNC drilling machining process.     

物联网技术在公安工作中的应用研究

物联网被认为是继计算机、互联网与移动通信之后的世界信息产业的下一步发展方向。同时,随着物联网技术在中国的发展,物联网在现实中不断转变成不同行业的相关应用,人们也在通过物联网技术来不断提高自身的生活质量和水平。公安机关可以利用物联网技术实现监管的智能化,特别是在处理反恐和突发事件、智能安防、公共场所人群安全防范等众多方面都有很大的发展空间。文章分析了物联网概念及特点,论述了物联网在中国的典型应用,最后提出物联网技术在公安机关各项工作中的应用初探。     

物联网体系及相关技术研究

当前物联网的定义、内在原理、体系结构和系统模型等方面还存在许多值得探讨的问题,为此,通过解析物联网的基本概念和特征,提出了物联网体系架构的感知层、网络层及应用层的三层架构,归纳了物联网涉及的射频识别、传感器、网络通信和云计算等关键技术,讨论了物联网在对象识别,跟踪及控制方面的具体应用。