| With the arising of Internet economy, the EC (Electronic Business) development continuously demands for Electronic Business talents with high quantity and quality. Apparently universities have responsibility for cultivating EC professional personnel to satisfy the demand.As EC teaching includes many practice processes, it is necessary to construct good experiment environment. The students not only should understand EC principles and methods, but also can apply the knowledge they learned to design the project in every phases of EC. Universities must equip computer networks and EC simulation systems that fit for teaching and practice for their EC major.In order to meet the needs of EC development and teaching, after investigation and research, we put forward a plan of developing an EC simulation system. By the aid of the system, on one hand students can experience the whole process of the EC, including B2C Internet shop, C2C online auction and B2B electronic market, and understand the role that the bank, the CA certificate and the materials distributing center play; and meanwhile students can build their own B2C sites and manage them in the system, on the other hand, teacher can evaluate student's web site, and manage the system. This thesis is based on my work of researching and developing on the project.This paper researches on the flow and technology in the EC, analyzes some famous EC systems in the whole world. Then, considering the latest EC development, and according to EC teaching plan and practice requirement, we design an EC simulation system that integrates net bank, CA center, materials distributing center, B2C Internet shop, B2B electronic broke store, C2C auction center and lab management. Finally, EC theory, structure and realization technology are also discussed.In the paper, we study synthetically operation characteristics of information flow, commercial flow, capital flow and trading flow in the EC system, and insist on two important principle: practice and opening when building the simulation system.When constructing the system, two key technologies are adopted. The first one is three-tiers structure technology under DNA (Distributed Internet Application Architecture), which consists of data service tier, business logic tier and presentation tier. The second one is thecomponent technology. It makes the system expandable.In the e-Commerce sites design process, I carefully study on several design patterns PloP organization and EuroPloP organization offered lately, such as web shop patterns which are divided into patterns for navigational views, patterns for building interfaces and patterns for infrastructure, web shop management patterns which consist of analysis pattern for inventories and analysis patterns for the order and shipment of a product, and online auction management patterns. Then I give the design on simulation Internet store FlyBridge and C2C auction e-Bridge. I study e-Commerce Agent patterns and XML-based patterns, propose to combine the two technologies to realize the simulation B2B e-broker.I study how to build e-Commerce sites based on .NET framework with DataSet and business components, and give an application of Internet shop.The first chapter of the thesis is a summary, which states current state of EC simulation software in our country, and gives the motivation of research. Chapter 2 puts forward a design architecture of simulation system based on DNA three-tie architecture that includes overall design, application design and function design. Chapter 3 carefully analyzes variety of design patterns of Internet store PloP organization and EuroPloP organization offered, and gives a schema of simulate Internet store FlyBridge. Besides, the chapter also carefully studies the three-ties architecture of DNA and discusses how to deploy expandable and robust e-Commerce sites based on .NET architecture. Finally, a realization of Internet shop for simulation is described. Chapter 4 gives a design of C2C online auction e-Bridge. Chapter 5 discusses E-Commerce Agen...
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