Research on Independent Product Development for Concurrent Collaborative Environment & Supporting Technologies

This article deals with the research on the features and collaborative process of independent development of key automobile parts. It generally employed concurrent engineering theory and technologies of Internet & Intranet, computer aided design (CAD), computer aided manufacturing (CAM) and product data management (PDM). Field knowledge on independent development of key automobile parts was concluded and a set of concurrent collaborative environment and key enabling supporting technologies that face the independent development of automobile body panel dies were also built up. Meanwhile it introduced the secondary development methods of knowledge based engineering (KBE) to implement the knowledge transformation of designing and manufacturing experiences for an enterprise. The results was applied for the development & production of one of this enterprise's new automobile styles and work well.     

Dynamic Data Exchange for Collaborative Design Based on Internet

The dynamic data exchange is the key to the realization of the collaborative design based on Internet. The features of data for collaborative design based on Internet are analyzed. The data transformation, the data transmission and the data transaction of collaborative design based on Internet are researched. The system configuration and organization mode of dynamic data exchange for collaborative design Internet-based are developed, in which, STEP serves as the product data exchange standard, and ORACLE is the kernel database of the system, so that each of the CAD systems can synchronously access the ORACLE database, share and exchange the design information. The STEP-ORACLE serves as the organizing mode of dynamic data exchange for the collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data between the different platforms and CAD systems.     

Collaborative Work Team Grouping Strategy in Networked Virtual Enterprise

Grouping a virtual enterprise is a key technique of agile manufacturing formation.By analyzing the elements of the enterprise's resource and requirements and making use of the concept of rescouce index and the mothed of fuzzy judgement, the model of enterprise's resource is presented. The communication structure of collaborative work team is built by using the network infrastructure of COBRA .Also, team grouping process of collaborative work is discussed.Considering the enterprise's resource demands, the strategy of selecting partners based on the optimzation of enterprises's resource is proposed.     

A New Distributed Computing Platform-Jini and Its Application

With the development of network technology distributed computing has become more and more prevalent. Only that kind of distributed platforms which have the attributes of platform independence, dynamic, robustness, security and convenience are what users need. This article mainly discusses a distributed computing platform based on Java Technology--Jini, introduces its advantages compared to traditional distributed systems.Its basic principles and key concepts, system structures, programming patterns and protocols, the services it provides and service procedures are also proposed. In the end a introduction of its application on digital home net is given.     

Communication Platform Based CORBA and java in Collaborative Design

The present status and problem for collaborative design are analyzed. A communication system structure based CORBA principle and the Java distributed programming technology is developed. The capability of CORBA and Java supplying is compensated each other in this structure system. The integration of CORBA and Java is proved to be a more effective designing platform for distributed collaborative design in the area developing WWW-based applications. Highly efficient safe communication is realized for collaborative design.     

Opening Architecture of Collaborative Design Grid and Its Key Techniques

OGSA, as a universal grid computing frame, has resolved a good many problems in the CSCD, and provides a new solution for the network-based collaborative design. This paper studied the main problems in application of the grid technology to network-based collaborative design system by the OGSA based the WSRF, which is used as the basic platform of collaborative design grid. The meaning of the collaborative design grid is explained, and then the opening architecture of collaborative design grid design process on the condition of eoll is presented based on the function analysis in detail. Meanwhile, the collaborative aborative design grid is explained, and the key technologies of the collaborative design grid are analyzed deeply. The results provide a solution and groundwork for the more research on the collaborative design grid and its implementation.     

Network Security Monitor

Illegal traffics on network can be actively detected by network security monitor An advanced system is given which can capture network data stream and intercept malicious attack, so as to alarm or take response action in real-time. The system is composed by sniffer, monitor control center, remote management unit,etc. Attack activities under surveillance can be distinguished by two methods,which are rule based method and statistics based method. Intrusion recognition by sniffer is the key technology of the system. In addition, dilemma between real-time data stream and high inquiry speed, as well as dynamic addition of attack rules contributes to the main concern of system design. Backdoor of The system can be self detected, while intelligent analysis and bi-directional surveillance ability has also been implemented. With all these advance features, the system is presented not only as a strong assistant to traditional network security products, but also an important tool for counter-fighting with rampant network intrusion nowadays.     

Web System Development Model Based on Access Security MVC

In order to reduce the inconvenience of maintainability and reusability of web application system based on MVC, which is brought by the code of access security and coupling tightly with other modules, A web system development model based on access security MVC is put forward. The main framework and running process are provided and the key techniques of this model are researched. The model is applied to the practical development of the network distribution management system.     

Intrusion Detection Technology in Ad Hoc Network

With the rapid development of wireless network and mobile computing,the security of network becomes more important.As one of wireless mobile network,mobile Ad hoc network has new vulnerabilities that do not exist in a fixed wired network,and is susceptible to attacks.This paper introduces some methods which used in intrusion detection system and provides a new model of system based on multi-layer integrated distributed technology,especially recommend the protocol analyzing method in this system.     

Multi-server Technology for Internet-based Collaborative Design

A distributed Client/Multi-Server system is developed, in which the multi-server system controlled the collaborative clients by the mechanism of collision arbitration. This is made to avoid collaborative clients to become completely dependent on the single server and to improve the stabilization and reliability of the server system. A mathematic model of multi-server system based on queuing theory is presented. The solution of mathematic model is analyzed, which includes the average utilization frequency of servers, the length of queuing and waiting time. The theory system, which is intuitionistie and convenient, is redounded to reflecting the dynamic data change of the system, reasonably organizing the system and optimizing the design methodology of the multi-server system.     

Constructing organization network for community-oriented collaborative product design

Community-oriented collaborative design is an emergent form of collaborative product development, in which the range of collaborative partners extends to wide area community members. It is difficult to construct the organization network because the accurate features of the wide area community members are hard to access. Aiming at this problem, an organization network constructing method based on bidding mechanism is proposed. First, the bidding process based on contract net with confirmation protocol (CNCP) is presented. Then, considering the false profit declared by the bidders, a multiple rounds bidding process combined with genetic algorithm (GA) is used to get the best sub-projects allocation scheme, in which the total payment of sub-projects is minimal and the project due time is satisfied. A case analysis shows that the method can eliminate the false profit declared by the bidders and provides an operable way to construct network organization for community-oriented collaborative design.     

Application of improved genetic algorithm to locating and sizing of distributed generation

A Prüfer-coded genetic algorithm based on the decimal number of nodes is proposed and it is used to solve collaborative optimization planning of access solution of distributed generation(DG)and structure of distribution network.Using graph theory to generate theoretically feasible topology structureand the access nodes and the installed capacity of distributed generation are coded by the Prüfer number.The coding method makes the distribution network operation structure and the access solution of DG combine into the evolution problem of the same chromosomal gene.The length of the chromosome coding of this method is shorter than binary encoding.This solution takes full advantage of the Prüfer-coded to improve computational efficiency and convergence rateand makes some restrictions and improvements in some key parts of the algorithm to solve the problem illegal solution.Finallyfeasibility and superiority of the algorithm is validated by a case study.     

Research and Application Development Pattern Based of a Collaborative Product on Service-on-Demand Mode

According to the instant demand coming from the collaborative product development of small and medium manufacturing enterprises, this paper brings out a kind of a collaborative product development service-on-demand mode based on web-service, and a framework for this service-on-demand mode are also given. According to these, this research sets up a web based collaborative product development service platform, analyzes the function structure, service flow and the main implement techniques. The service pattern and the platform have already applied to collaborative product development in small and medium manufacturing enterprises and have helped to increase technique innovation, reduce the total time and cost in development process.     

Dynamic data exchange based on STEP-OODB for network-supported collaborative design

This paper analyzes the features of data for network-supported collaborative design, researches the data transformation, the data transmission and the data transaction of collaborative design. The system configuration and organization mode of dynamic data exchange for network-supported collaborative design are developed, in which, STEP serves as the product data exchange standard, what's more, Object-Oriented Database (OODB) is the kernel database of the system, so that each of the CAD systems can synchronously access the OODB, share and exchange the design information. The STEP-OODB serves as the organizing mode of dynamic data exchange for the network-supported collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data among the cross-platforms and CAD systems.     

Design of Manufacturing System for Business

In the new environment, product development is the core of product innovation and quickly responsive to the market for the enterprises. The speed and effectiveness of development is the key factor to the success of product development. The design for business is the key technique in achieving the effectiveness of product development. And manufacturing system is the bridge between business and products. The design method of facing business is discussed, and the design flow and content of manufacturing system supporting facing business are pointed out. At the same time, the author also sets forth the construction definition, the construction design and the detailed design of the manufacturing system. So the design flow of manufacturing system facing business is established.     

Method for Dynamic Tasks Allocation in Automatic Shop Based-on the Idea of AM

A distributed scheduling method in a networked manufacturing enviroment is given. A allocation algorithm for dynamic tasks in distributed systems based on LAN information in factories is introduced. The design goal is to obtain some better comprehensive targets, such as cost price, load balance, waiting time and efficient of systems.     

Multi-mode Running Architecture of Networked Manufacturing Platform and Its Implementation Technology

Adopting organizational mode of networked manufacturing platform is an effective way of improving enterprise's condition to implement networked manufacturing. This kind of mode can make the architecture of enterprise collaborative work change from complex network architecture to a simple linear architecture. Based on the organizational mode, a Multi-mode running architecture of networked manufacturing platform was proposed in this paper. The Multi-mode can make networked manufacturing platform to fit different requirement of enterprises and industry. Integrated technology and related standardization technology were studied on the basis of this Multi-mode architecture. It can constitute the technology and implementation basis for the networked manufacturing platform's running.     

Main Frame of Contemporary Integrated Manufacture System

Based on the success of CIM philosophy applied in manufacturing industries for reference, the author, analyses the character of modern furniture's produce and management, etc., and set out from real need of modern furniture manufacture to establish the architecture of contemporary integrated furniture manufacture system. The key technologies such as methods and viewpoints of contemporary integrated furniture manufacture system are discussed. Finally, the stream of material is reviewed as core and ERP, FEC is included in contemporary integrated furniture manufacture system based on web distributed database is put forward. The work is a helpful investigation to CIMS and gives a beneficial idea to implement CIMS in furniture industry.     

Realtime Collaborative Design System Based on AutoCAD

It is hard to realize the Realtime Collaborative Design due to the limitation of network bandwidth and some other reasons over Internet. A Realtime Collaborative Design System is constructed with complete distribution construction and concentrated distribution construction. Based on the research of outcome of the research group, the dynamic data format is modified and optimized, it reduces the load of network in collaborative design to meet the requirement of realtime and enhances the capacity of rapid response and stability of the system.