With the evolution of application system, there are t wo different system architectures. One is the traditional application system suc h as MIS and Business Software. Along with its extension, the traditional applic a...With the evolution of application system, there are t wo different system architectures. One is the traditional application system suc h as MIS and Business Software. Along with its extension, the traditional applic ation system transforms from file-based structure to C/S and then CSS model. At the same time, following the prevalence of Internet/Intranet, Web application s ystem based on browser comes into being. In early time, Web application only pro vided functions of looking over or querying static data on browser. But with the development of Internet/Intranet widely, it’s expected that more and more trad itional applications can be performed on browser, or even E-Business trades and other complicated application systems such as MIS, ERP and CRM and so on. In or der to satisfy both traditional application and Web application, reduce the cost of developing system repeatedly, increase the repeated use of application syste m and take advantage of the functions of OOA/OOD sufficiently, a new distributed architecture structure (system solution based on repeated components) comes for th. In this article, this distributed architecture structure will be discuss ed in detail. Firstly, the evolution of traditional application system and Web application sys tem will be talked over, especially the advantages and disadvantages of these tw o architectures. Secondly, the distributed architecture (system solution based o n repeated components) will be described particular. Several prevalent technolog y of component, such as COM+, CORBA and EJB, will also be illustrate d in this part. Thirdly, the practice of the technology of repeated component wi ll be discussed by analysing and designing the management system of Science & Te chnology Articles. Lastly, the latest distributed techonlogy of E-business(Web service based on xml/soap) will be discussed. In the end, Based on summing-up o f the distributed technology of E-Business, the future distributed tenchnology of E-Business will be expected.展开更多
生物质能-碳捕集与封存(Bioenergy with Carbon Capture and Storage,BECCS)是一种应对气候变化的重要负排放技术。然而,目前学者对于该技术的可持续性应用仍存在争议。能值分析是一种能有效评估系统可持续性的量化方法,能够对系统的资...生物质能-碳捕集与封存(Bioenergy with Carbon Capture and Storage,BECCS)是一种应对气候变化的重要负排放技术。然而,目前学者对于该技术的可持续性应用仍存在争议。能值分析是一种能有效评估系统可持续性的量化方法,能够对系统的资源效率、环境影响和经济效益进行综合考量,进而全面反映系统的可持续发展水平。对8种典型的生物质发电系统,即有/无碳捕集与封存(Carbon Capture and Storage,CCS)的生物质直燃发电、生物质掺烧发电、生物质整体气化循环发电以及2种新型BECCS展开能值分析,选取能值产出率、环境负载率、可持续性指数等典型能值指标和碳排放指标对系统展开对比评价。结果显示,生物质发电系统的CO_(2)净排放量远低于煤基发电系统,耦合CCS后可实现负排放效益;生物质发电系统具有较低的环境负载率(ELR<2)和较高的可持续性指数(ESI<5.5),综合效益表现较优,长期可持续。此外,系统可持续性还与国家政策和生物质供应有关。敏感性分析表明,制定合适的激励政策,合理规划电厂选址以确保稳定充足的生物质供给,是提高系统可持续性的重要途径。展开更多
文摘With the evolution of application system, there are t wo different system architectures. One is the traditional application system suc h as MIS and Business Software. Along with its extension, the traditional applic ation system transforms from file-based structure to C/S and then CSS model. At the same time, following the prevalence of Internet/Intranet, Web application s ystem based on browser comes into being. In early time, Web application only pro vided functions of looking over or querying static data on browser. But with the development of Internet/Intranet widely, it’s expected that more and more trad itional applications can be performed on browser, or even E-Business trades and other complicated application systems such as MIS, ERP and CRM and so on. In or der to satisfy both traditional application and Web application, reduce the cost of developing system repeatedly, increase the repeated use of application syste m and take advantage of the functions of OOA/OOD sufficiently, a new distributed architecture structure (system solution based on repeated components) comes for th. In this article, this distributed architecture structure will be discuss ed in detail. Firstly, the evolution of traditional application system and Web application sys tem will be talked over, especially the advantages and disadvantages of these tw o architectures. Secondly, the distributed architecture (system solution based o n repeated components) will be described particular. Several prevalent technolog y of component, such as COM+, CORBA and EJB, will also be illustrate d in this part. Thirdly, the practice of the technology of repeated component wi ll be discussed by analysing and designing the management system of Science & Te chnology Articles. Lastly, the latest distributed techonlogy of E-business(Web service based on xml/soap) will be discussed. In the end, Based on summing-up o f the distributed technology of E-Business, the future distributed tenchnology of E-Business will be expected.
文摘生物质能-碳捕集与封存(Bioenergy with Carbon Capture and Storage,BECCS)是一种应对气候变化的重要负排放技术。然而,目前学者对于该技术的可持续性应用仍存在争议。能值分析是一种能有效评估系统可持续性的量化方法,能够对系统的资源效率、环境影响和经济效益进行综合考量,进而全面反映系统的可持续发展水平。对8种典型的生物质发电系统,即有/无碳捕集与封存(Carbon Capture and Storage,CCS)的生物质直燃发电、生物质掺烧发电、生物质整体气化循环发电以及2种新型BECCS展开能值分析,选取能值产出率、环境负载率、可持续性指数等典型能值指标和碳排放指标对系统展开对比评价。结果显示,生物质发电系统的CO_(2)净排放量远低于煤基发电系统,耦合CCS后可实现负排放效益;生物质发电系统具有较低的环境负载率(ELR<2)和较高的可持续性指数(ESI<5.5),综合效益表现较优,长期可持续。此外,系统可持续性还与国家政策和生物质供应有关。敏感性分析表明,制定合适的激励政策,合理规划电厂选址以确保稳定充足的生物质供给,是提高系统可持续性的重要途径。
