Requirements model driven adaption and evolution of Internetware

Today’s software systems need to support complex business operations and processes.The development of the web-based software systems has been pushing up the limits of traditional software engineering methodologies and technologies as they are required to be used and updated almost real-time,so that users can interact and share the same applications over the internet as needed.These applications have to adapt quickly to the diversified and dynamic changing requirements in the physical,technological,economical and social environments.As a consequence,we are expecting a major paradigm shift in software engineering to reflect such changes in computing environment in order to better address the fundamental needs of organisations in this new era.Existing software technologies,such as model driven development,business process engineering,online(re-)configuration,composition and adaptation of managerial functionalities are being repurposed to reduce the time taken for software development by reusing software codes.The ability to dynamically combine contents from numerous web sites and local resources,and the ability to instantly publish services worldwide have opened up entirely new possibilities for software development.In retrospect to the ten years applied research on Internetware,we have witnessed such a paradigm shift,which brings about many changes to the developmental experience of conventional web applications.Several related technologies,such as cloud computing,service computing,cyber-physical systems and social computing,have converged to address this emerging issue with emphasis on different aspects.In this paper,we first outline the requirements that the Internetware software paradigm should meet to excel at web application adaptation;we then propose a requirement model driven method for adaptive and evolutionary applications;and we report our experiences and case studies of applying it to an enterprise information system.Our goal is to provide high-level guidelines to researchers and practitioners to meet the challenges of building adaptive industrial-strength applications with the spectrum of processes,techniques and facilities provided within the Internetware paradigm.     

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Detecting the electrical conductivity of single walled carbon nano-tubes by a DFM detection system

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很多仿真中对开关磁阻电动机调速系统（SRD）采用电流斩波控制,该方法仿真建模简单,但难以数字化。本文针对这一问题,对SRD采用电压斩波及开关角优化综合控制,并进行仿真。在MATLAB／Simulink中,构造SRD模型,包括开关磁阻电动机本体模型、电压斩波模块、PI调节器模块等。在此基础上采用模糊控制器在线优化开通θon和关断角θoff,以减小转矩脉动。仿真结果证明了该SRD建模的合理性、有效性,为SRD电压斩波控制方式数字化提供了基础和依据,为实际SRD的设计和调试提供有效的手段和工具。     

电子束偏放输出温度漂移的自动补偿

分析了ＳＤＳ－２多功能电子束扫描系统输出温度漂移的主要因素,经过理论分析提出了一种减少温度漂移的有效方法,实验表明此方法有很好的温度漂移的自动补偿。     

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