Research On The Key Issues Of Instant Construction Service Supply Chain In Electronic Commerce Service Platform

With the fantastic developmment of information and network communication technology and global expansion of service economy form, electronic commerce is gradually developing into electronic commerce service industry, and showing the new features of ubiquity, virtuality,individuation and sociality etc. The strong growth of service economy is an important sign of the development of modern science and technology and industry progress. It is an important strength to promote the development of electronic commerce service industry. It is sure to bring about profound transformation to social modes of production, consumption and trade. These changes will gradually dim the service industry and manufacturing industry. The traditional supply chain management has broken through the boundary of the manufacturing industry, extending to the downstream services.In2004, the American professor Lisa M Ellram published her article"Understanding and Managing Service Supply Chain", putting forward the concept of service supply chain for the first time, thus starting the services supply chain research. The current service supply chain research mainly focuses on the industrial application areas of logistics, tourism, property services etc. Because service supply chain is still a new field of study, there isn't a unified definition yet so far. But as far as its essence and goal are concerned, service supply chain is service oriented, it integrates service providers, integration providers and customer. With the effective integration and synergy of all the service resources of the supply chain, maximizing the customer whole utility and personalized satisfaction. As to the structure, the basic structure of the supply chain is function service providers----service integration providers----customer mode. Service integration providers intrgrates many services of function service providers and then provide the service products to the customers as a whole. Different from the manufactured products, the service products can influence the customers. They are invisible, inseparable, heterogeneity, perishable and labor intensive. Therefore, generally speaking, the services supply chain has the following characteristics:(1) service supply chain puts more emphasis on the dynamic, collaboration and individuation. It constructs immediately based on personal demand of customers and revokes after the service;(2) services forming service supply chain tend to have the regional distributivity;(3) services forming service supply chain have the characteristics of time asynchronism. Service implementation is composed of Online and Offline.(4) the service quality evaluation index and measurement is an important means to ensure the service quality of the supply chain (5) the implementation, control and failure handling in the service supply chain are vital to the successful completion of the supply chain.The above characteristics determines that in the informationization environment, instant construction of service supply chain for personalized needs are new chanllenges for the current software theory, technology and method, concerning mode change of service supply chain, application of modern information technology and method innovation. While its core is to structure the users'personalized demand actuation service process in order to realize the dynamic service resources integration and synergy.The main problems are that there is no systemic theoretical research on the problems of personalized service supply chain mode and its construction, no full consideration of the service features of the service supply chain and flow characteristics of service supply chain itself. The services forming service supply chain are distributed in the Internet. How to organize them effectively by negotiation and manage them on the electronic commerce service supply chain platform, thus used by service supply chain construction. How to evaluate and measure the service quality in the service supply chain, thus designing multiple target and global optimization service combination model and optimization algorithm based on users'personalized requirements. It lacks of effective monitoring and fault-tolerant processing mechanism in the process of service supply chain implementation etc. However, the internal logical consistency of the calculation idea and service supply chain value orientation gives an opportunity for the immediate construction of service supply chain.Taking the immediate construction of the service supply chain as the goal, the article has studied the main problems. The main work and contribution summarized as follows:1. Put forward an organization method of service resources based on domain orientation and hierarchical service network HSN, thus greatly improving the efficiency of service selection and service composition in the process of the service supply chain instant construction and giving support for the flow implementation monitoring and fault-tolerant processing.The paper puts forward a service infrastructure for the effective management of the Internet Web Service resources which can form service supply chain--hierarchical service network model, setting up virtual service and virtual service groups by sampling and marking the service description to probe into the relationship between services and to set up suggestive mechanism between virtual service and actual service. It defines the functions of virtual service layer, virtual service interface and registration service in the hierarchical service network model in detail and gives a formalized description. The hierarchical service network model is able to shield the heterogeneity and distributivity of network resources. It is benificial to provide a unified access mechanism for users. On the basis of the deep analysis of the semantic relations between services in the domain oriented service supply chain, nine intrastratal relationships and one interstratified relationship are defined with semantic definitions. Combining semantic Web and information classification technology, it presents a service classifying and marking method based on semantic similarity. It also puts forward the construction and maintenance methods of hierarchical service network in node joining, deleting, modifying and managing of service groups. In order to perceive the Web service resources state in time and manage the hierarchical service network effectively, on the basis of the above study, the paper defines hierarchical service network system structure oriented on domain application, solving the problems in the service supply chain instant construction. The above research findings are an important basis for the follow-up efficient service discovery, dynamic service combination and the service supply chain flow implementation and monitoring. It plays a vital role in the improvement of Web service resources'discovery, access efficiency, dynamic perception of Web service resources state and dynamic adjustment.2. Put forward the dynamic service selection method on the basis of multidimensional QoS constraints, and gives a full consideration of the users' preferences and service quality attribute weight factors in the design of the QoS measurement model and can better satisfy the personalized requirements of the service choices of the service supply chain construction.According to the domain characteristics of service supply chain, use service time, cost, reliability, availability, reputation and security as attribute index in the QoS measurement model. In order to reduce the computational complexity and make the Web service QoS index value dynamically adapting to all factor changes, use mathematical expectation and variance index for QoS processing. According to this, the paper puts forward a service choice model based on level service network, improved MMKP(Multi-choice, Multi-dimension0-1Knapsack Problem) knapsack problems. In order to solve the problem----the service quality evaluation standard is conflicting, it defines the service quality evaluation model, gives specific service quality evaluation utility adjustment function, and gives a full consideration of users'preferences to the service quality attributes and the significance of attribute weight index etc. Simulation experiments show that MMQC_KP algorithm is superior to that before improvement in terms of time consumption and success rate of combination.3. Put forward a dynamic service composition method on the basis of two stages of hierarchical task network, HTN Planning. With the level service network effectively limiting the size of the search field, and using the pruning search method according to the users'preference constraints, thus better improving the planning efficiency and satisfaction of service supply chain users. The article has studied a mechanism of converting users'personalized needs into executable service supply chain process, putting forward dynamic service combination method based on the two stages of HTN planning. On the basis of the classical HTN planning theory, this paper puts forward a service planning model suitable for service supply chain instant construction, gives a detailed formalized defination and description for planning domain, task, method, state, restriction and satisfiability etc. It also puts forward task decomposition method and planning algorithm based on the model, converting users'preferences requirements into restriction parameter to constrict planning process, in the concrete performance of planning algorithm, get rid of the branches which fail to meet the requirements with pruning function, thus better improving the performance efficiency of planning algorithm. In allusion to the instant construction of service supply chain, the basic process and goal of the dynamic service combination of the two stages are defined. The users'demand information based on the needs of XSRL description is modeled. As to the function match problem, this paper proposes service function algorithm of serching in the hierarchical service network based on the relationships of exact, plugin, subsume and intersection and gives HTNDSC according to HTN planning. The experimental results show that, for solving service supply chain construction problems, HTNDSC algorithm based on hierarchical service network has better performance than OWL-S Matcher algorithm etc in service matching efficiency and running time.4. Put forward the process monitoring framework of service oriented supply chain dynamic process implementation. With a full analysis of the service supply chain and process characteristics, service implementation process is divided into Online (computing equipment implementation process) and Offline (non-computing equipment implementation process). Based on this, the paper gives the definition of fault-tolerantce strategy in the service supply chain process, putting forward service supply chian fault-tolerant method based on the service time, service state and users'constraints.In terms of the implementation process monitoring in the service supply chain flow, this paper proposes a dynamic implementation process monitoring framework in the service supply chain flow, defines all function elements in the frame, describes the detailed internal structure and work mechanism of fault handler. It also defines the conversion process and perception method of the service states. As to the fault tolerance problems in service supply chain process, a deep research on failure handling mechanism in the service supply chain is done. On the basis of the service operation in the failure handling, it defines three service relationships in favor of failure handling----commutation relation, dependency relation and alternative relation, putting forward some basic failure handling strategies as ignorance, retry, alternative, compensation, manual intervention and halt etc. According to the characteristics of the service supply chain process, the basic process structure is divided into three types-sequence structure, branch structure and assemble structure. And from this standpoint, it presents a failure handling based on the service time, service condition and users' constraints service supply chain failure handling method.The research work has preferably solved the key problems of the instant constructioin process in the services supply chain. Simulation experiments has proved that the given algorithms have a better time efficiency.