基于GPRS的环境监测系统的设计

为了实现对环境参数的远程实时监测,设计了一种基于GPRS的无线环境监测系统.使用GPRS网络作为无线传输网络,通过TCP/IP协议进行上位机和现场机之间的无线数据传输.使用Visual Basic.NET中的SOCKET组件以及ADO.NET技术,实现了系统数据通信和后台数据库功能模块,并给出了系统测试结果.该系统具有分布范围广、自动化监控、实时数据传输、费用低廉等特点,特别适合突发性且频繁的小流量数据传输.     

基于Modbus TCP和WEB的实时监控系统设计

为了实时、便捷地了解测控现场设备运行的状况,设计了一种基于Modbus TCP和WEB的实时监控系统。该系统设计基于dsPIC30F6014单片机,实现对采集模块的控制,并通过ASP.NET创建的动态WEB浏览器和SQL强大的数据库功能完成实时监控。结果表明,该系统能快速、方便、实时地动态显示设备的各项运行指标。     

基于PHD实时数据库的电气监控系统

为了方便管理人员实时的掌握变电所电气设备的运行情况,开发了基于PHD实时数据库的电气监控系统.PHD实时数据库提供了现场的实时数据的平台,通过VB程序读取实时数据,与Flash监控图进行通讯.最终通过WEB页面向用户提供现场信息.     

基于WEB的消防设备监控系统

针对消防设备监控的具体应用,提出一种基于WEB平台的并运用数据库技术和图像处理技术的监控系统方案。本系统采用.Net技术,通过构建一个WEB服务器来对监控现场信息进行实时远程传输,并允许客户端对所监控的信息进行识别和处理。     

基于ARM9网关的智能安防监控系统

本文介绍了基于ARM9处理器的无线网关安防监控系统的设计和实现。通过连接摄像头和相应传感器得到相关信息,通过GPRS将信息和监控画面发送到监控中心,从而在远端能对各监控场所的传感器信息和相关图像进行采集、监控、分析,以便能够实时、准确、直接地了解和掌握现场的情况,并及时做出反应。     

分布式农村分散污水处理系统分析与研究

结合新农村污水布局分散、规模较小、地形条件复杂、污水不易集中收集等特点。我们采用远程监控技术,该系统由现场数据采集装置、数据传输设备、监控中心软件及监控客户端软件组成。根据分散型新农村特点,该系统的工作过程为通过现场终端数据采集传感器将采集到的各排污指标数据,通过PLC传输给GPRS-DTU,再通过GPRS-DTU接入移动GPRS网络,把数据传送到GPRS网络,利用GPRS网络和互联网的对接口把数据采集设备采集到的数据传送到互联网相对应的固定IP监控中心服务器上,监控中心服务器将数据进行存储,并通过WebService进行发布,对数据信息进行共享。同时监控中心服务器通过实时监控软件将信息实时发布,监控者即可通过连接在互联网上的数据中心服务器浏览数据进行实时监控,同时也可以通过其他监控中心发布的数据接口查看其他监控中心数据。     

GPRS技术在机场高杆灯监控系统中的应用

为实现乌鲁木齐机场分散高杆灯的综合高效管理,系统上位机通过Internet、GPRS网络及数字传输装置(DTU)与现场PLC进行通信,完成对机场照明设施的远程实时监控.GPRS安全、高速、全天候的数据无线传输特点为系统的可靠、安全运行提供了有力保障.实际应用结果表明,系统运行状态良好,满足了现场要求,为新疆民航总站对各地州分站实现实时监控积累了成功的经验.     

基于OPC和WEB的电厂监控系统

为消除电厂生产中管理网与控制网之间的信息瓶颈,开发了基于OPC和WEB分布式生产监控系统。OPC交换服务器具有支持QOS的实时信息转发、实时数据存储及网络对象管理等功能。WEB系统具有数据集成以及发布功能。在此基础上,提出了三层结构的架构方案实例,以及现场实现的关键技术。     

基于.NET的农业生产环境信息监测系统

针对农业生产环境信息化管理的需求,在Microsoft.NET平台上结合C#语言和ASP.NET技术,构建了基于.NET的农业生产环境信息监测系统.采用B/S体系结构模型,设计了系统功能与数据库,着重解析了诸如.NET组件设计、ADO.NET数据访问、Ajax动态更新页面、多媒体嵌入以及系统安全等几个关键技术.该系统通过试验分析与示范验证,具有较好的实用性、安全性和可维护性,有效实现了农业生产过程中多元环境信息的实时监测和远程共享,为农业生产管理提供了及时准确的科学依据.     

基于.NET的可编程直流电源监控系统的设计与实现

为满足可编程直流电源在自动化生产线、无人值守的工业现场的使用需求,设计一种基于.NET技术,使用C#语言开发的监控系统。监控系统有本地监控和远程监控两种工作模式,具有自适应连接直流电源、监控直流电源输出、设置直流电源参数、超限报警、数据记录与波形显示等功能,为直流电源的实时监视和智能控制提供了极大方便。     

Local path planning using a new artificial potential function composition and its analytical design guidelines

This paper presents a new framework for path planning based on artificial potential functions (APFs). In this scheme, the APFs for path planning have a multiplicative and additive composition between APFs for goal destination and APFs for obstacle avoidance, unlike conventional composition where the APF for obstacle avoidance is added to the APF for goal destination. In particular, this paper presents a set of analytical guidelines for designing potential functions to avoid local minima for a number of representative scenarios based on the proposed framework for path planning. Specifically the following cases are addressed: (i) a non-reachable goal problem (a case in which the potential of the goal is overwhelmed by the potential of an obstacle), (ii) an obstacle collision problem (a case in which the potential of the obstacle is overwhelmed by the potential of the goal) and (iii) a narrow passage problem (a case in which the potential of the goal is overwhelmed by the potential of two obstacles). The example results for each case show that the proposed scheme can effectively construct a path-planning system with the capability of reaching a goal and avoiding obstacles despite possible local minima.     

Compact disc standards: an introductory overview

The success of the compact disc (CD) as a storage medium for digital audio has, over the last ten years, resulted in a number of initiatives to use the CD for other applications as well, e.g., as read-only memory for computers, as a storage medium for audio-visual material for multimedia applications, and as a storage medium for photographs. Each of these applications poses additional requirements on how the corresponding information is stored and retrieved, resulting in a range of different CD standards. The functional specifications of these standards are each given a specific color for ease of reference: the Red Book for CD-DA, the Yellow Book for CD-ROM, the Green Book for CD-I, etc. This paper aims at giving an overview of the various CD standards by explaining what is specified in each of the colored books and by indicating how they relate to one another.     

A systemic approach to integrated E-maintenance of large engineering plants

Large engineering plants (LEPs) have certain unique features that necessitate a maintenance strategy that is a combination of both time and condition based maintenance. Although this requirement is appreciated to varying degrees by asset owners, applied research leading to a systematic development of such a maintenance strategy is the need of the day. Such a strategy should also adopt a wholesome ``systemic' approach so that the realization of the overall objectives of maintenance is maximized. E-maintenance has several potential benefits for large engineering plants. In this paper, a three pronged strategy is suggested for the successful implementation of e-maintenance for LEPs. Firstly, an integrated condition and time based maintenance framework is proposed for LEPs. Secondly, reference is drawn to models for condition and time based maintenance at systemic levels. As a part of the ab initio development of a condition monitoring system for a LEP, one of the characteristics of the condition monitoring system, namely, predictability, is discussed in detail as a sample for a systemic study. Thirdly, emphasis is laid on the information and expertise available in the domain of plant design, operation and maintenance and the same is tapped for incorporation in maintenance decision making.     

LIY: learn-it-yourself software interfaces

An increasing number of people are becoming users of unfamiliar software. They can be genuinely "new" computer users or part of a growing group who are transferring skills and knowledge from a familiar product such as a word processor to a functionally similar, but different, unfamiliar one. The problem for users in this position is that they do not have access to training courses to teach them how to use such software and are usually forced to rely on text-based documentation. LIY is a method for producing computer-based tutorials to teach the user ofasoftware product.This paper describes how LIY is, in turn, (1) a method for application system design which recognizes the need for tutorial design (a task analysis and user interface specification provide information structures that are passed to the tutorial designer); (2) a support environment for the tutorial designer (in addition to prompting for courseware for nodes in the task analysis, LIY provides a ready-made rule base for constraining the degree of learner control available while the tutorial is in use. The designer is able to tailor this rule base for a specific tutorial); and (3) a tutorial delivery environment (the tutorial adapts to individual learners and offers a degree of learner control).     

MARVIN: A Web-Based System for Representing,Retrieving, and Visualizing Analogies

Analogies are essential in human cognition, reasoning, learning, communication, and problem solving. They can have a profound and broad effect on how we view and understand our world. In this paper we discuss the design, implementation, and evaluation of MARVIN (Markup for Analogy Representation and Visualization for the InterNet), a Web-based system for representing, retrieving, and visualizing human-conceived analogies that provides a medium and a common language for analogy practitioners to share their analogies. We developed a compact XML content model for analogy expressions for use in Web-based environments, and show that the model is capable of representing a wide range of human-conceived analogies. We demonstrate, using XSLT, several example methods for visualizing analogy expressions that use our model. We demonstrate methods for storing and retrieving such expressions and for ranking the retrieved expressions. We designed and implemented MARVIN to demonstrate these methods. A formative evaluation of the MARVIN system found that its visualization and retrieval capabilities are of value to analogy authors and end users. A performance test showed that MARVIN's analogy retrieval is scalable to large analogy archives.     

Project evaluation method using non-formatted text information based on multi-granular linguistic labels

We propose a novel project evaluation method for non-formatted Chinese text evaluation information. First, the non-formatted Chinese text evaluation information is determined and expressed using extensible markup language and a hypertext preprocessor. Then, the evaluation problem is transformed into a multiple-criteria decision-analysis problem based on multi-granular linguistic labels, including a comprehensive evaluation score for alternatives and an evaluation criteria point score for incomplete items. Next, we propose a weighting model for the criteria based on the minimal difference between the comprehensive evaluation score and the evaluation criterion point score of decision-makers. We establish an estimation model for incomplete evaluation items with the minimal evidence distance of Dempster–Shafer theory using maximal group consistency. In addition, we calculate a weighting for the decision-makers using the similarity of the group. Finally, we present a score modification method for alternatives based on weights of the criteria and the decision-maker. We use a soft science project evaluation and selection to illustrate the application process and feasibility of the proposed method.     

Database design with user-definable modelling concepts

Modelling is an integral part of engineering processes. Consequently, database design for engineering applications should take into account the modelling concepts used by engineers. On the other hand, these applications exhibit a wide diversity of modelling concepts. Rather than consolidating these into one single semantic data model one should aim for correspondingly specialized semantic models. This paper takes a constructive approach to developing such specialized models by proposing an Extensible Semantic Model (ESM) as the basis for declaring specialized semantic data models. The paper introduces a computerized environment for database design based on an ESM, and discusses the consequences of the ESM for a number of design tools: the need for a formal definition of the notion of modelling concept in order to have reliable and precise foundation for the extensions, declarative techniques for quickly introducing graphical representations for new concepts and for using them during schema design, conceptual-level test data generation for a designer-oriented evaluation of designs, and optimization techniques to control the wide latitude in mapping a conceptual schema to a logical schema. First experiences seem to point to considerable productivity gains during database design.     

A formal framework for connective stability of highly decentralized cooperative negotiations

Multiagent cooperative negotiation is a promising technique for modeling and controlling complex systems. Effective and flexible cooperative negotiations are especially useful for open complex systems characterized by high decentralization (which implies a low amount of exchanged information) and by dynamic connection and disconnection of agents. Applications include ad hoc network management, vehicle formation, and physiological model combination. To obtain an effective control action, the stability of the negotiation, namely the guarantee that an agreement will be eventually reached, is of paramount importance. However, the techniques usually employed for assessing the stability of a negotiation can be hardly applied in open scenarios. In this paper, whose nature is mainly theoretical, we make a first attempt towards engineering stable cooperative negotiations proposing a framework for their analysis and design. Specifically, we present a formal protocol for cooperative negotiations between a number of agents and we propose a criterion for negotiation stability based on the concept of connective stability. This is a form of stability that accounts for the effects of structural changes on the composition of a system and that appears very suitable for multiagent cooperative negotiations. To show its possible uses, we apply our framework for connective stability to some negotiations taken from literature.     

Reusing Primitive and Acquired Motion Knowledge for Gait Generation of a Six-legged Robot Using Genetic Programming

There has been growing interest in motion planning problems for mobile robots. In this field, the main research is to generate a motion for a specific robot and task without previously acquired motions. However it is too wasteful not to use hard-earned acquired motions for other tasks. Here, we focus on a mechanism of reusing acquired motion knowledge and study a motion planning system able to generate and reuse motion knowledge. In this paper, we adopt a tree-based representation for expressing knowledge of motion, and propose a hierarchical knowledge for realizing a reuse mechanism. We construct a motion planning system using hierarchical knowledge as motion knowledge and using genetic programming as a learning method. We apply a proposed method for the gait generation task of a six-legged locomotion robot and show its availability with computer simulation.