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
探究城市洪灾韧性与生态服务价值之间耦合协调关系,对城市防洪与生态文明建设具有重要意义。研究以吉林省松花江流域为例,基于“压力-状态-响应”模型(Pressure-State-Response,PSR)结合客观权重赋权法(Criteria Importance Though Inte...探究城市洪灾韧性与生态服务价值之间耦合协调关系,对城市防洪与生态文明建设具有重要意义。研究以吉林省松花江流域为例,基于“压力-状态-响应”模型(Pressure-State-Response,PSR)结合客观权重赋权法(Criteria Importance Though Intercrieria Correlation,CRITIC)-熵权法组合权重计算吉林省松花江流域城市洪灾韧性并探究其时空分布;采用生态系统服务和权衡综合评估(Integrated Valuation of Ecosystem Services and Trade-offs,InVEST)模型分析生态系统服务中水土保持量与水源涵养量,并在县区尺度上对其进行冷热点分析及变化趋势分析;通过耦合协调度模型对城市洪灾韧性与两种生态系统服务之间的关系进行探究。研究结果显示:2010—2022年吉林省松花江流域城市洪涝韧性呈西低东高的分布特征,整体韧性由一般提升为较高水平;生态系统服务空间异质性显著,热点区域分布于植被覆盖度较高的东部与南部,冷点区域分布于西部与北部,研究区中部生态系统服务下降,南部及西北部生态系统服务提升;城市洪灾韧性与生态系统服务耦合协调性一般,其中城市洪灾韧性与水土保持量耦合协调性轻微失调,与水源涵养量初级协调,且均有继续下降的风险,生态系统服务的下降已开始制约城市洪灾韧性的提高,需及时采取措施。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.
文摘探究城市洪灾韧性与生态服务价值之间耦合协调关系,对城市防洪与生态文明建设具有重要意义。研究以吉林省松花江流域为例,基于“压力-状态-响应”模型(Pressure-State-Response,PSR)结合客观权重赋权法(Criteria Importance Though Intercrieria Correlation,CRITIC)-熵权法组合权重计算吉林省松花江流域城市洪灾韧性并探究其时空分布;采用生态系统服务和权衡综合评估(Integrated Valuation of Ecosystem Services and Trade-offs,InVEST)模型分析生态系统服务中水土保持量与水源涵养量,并在县区尺度上对其进行冷热点分析及变化趋势分析;通过耦合协调度模型对城市洪灾韧性与两种生态系统服务之间的关系进行探究。研究结果显示:2010—2022年吉林省松花江流域城市洪涝韧性呈西低东高的分布特征,整体韧性由一般提升为较高水平;生态系统服务空间异质性显著,热点区域分布于植被覆盖度较高的东部与南部,冷点区域分布于西部与北部,研究区中部生态系统服务下降,南部及西北部生态系统服务提升;城市洪灾韧性与生态系统服务耦合协调性一般,其中城市洪灾韧性与水土保持量耦合协调性轻微失调,与水源涵养量初级协调,且均有继续下降的风险,生态系统服务的下降已开始制约城市洪灾韧性的提高,需及时采取措施。
