Advanced Materials Research Vols. 694-697

Abstract: Two secure, high-efficient and feasible e-cash schemes are proposed in this thesis based on elliptic curve by using blind signature system, the schemes are completed by three protocols, namely, withdrawal protocol, payment protocol and deposit protocol. The two schemes make advantage of blind parameter, namely, after cash is received by Bank, cash is also hardly connected with the signature at some times. They are simple and easily realized. The elliptic curve cryptographic algorithm is adopted in the scheme, the length of the private key is short, and its efficiency and strength is significantly higher than e-cash scheme based on RSA signature proposed by D.Chaum. There is no effective solution to the elliptic curve discrete logarithm problem (ECDLP), therefore, the schemes are safe.

Abstract: Taking the patent literature in the field of the 3G mobile communication in Derwent Innovation Index (DII) as the research object, this paper utilizes CiteSpace and Σ index to conduct analysis on key technologies of technical evolution in the 3G mobile communication system. Then, the key technologies from 1994 to 2009 are separated into four periods. Next, interpretations are formulated to study these key technologies represented by Derwent manual codes. Finally, this paper illustrates the key technologies and their main evolutional paths in different periods.

Abstract: In order to reduce the pressure of test resource in whole machine tests of construction machinery and provide more efficient service of test and analysis, a whole machine test service platform was designed and applied. Firstly whole machine tests of construction machinery were analyzed. Secondly whole machine test service of construction machinery was analyzed. Thirdly the architecture, function structure and database were designed. Then the application steps of the system were discussed. Feasibility and effectiveness of the system were verified by a case of enterprise application.

Abstract: To save manufacturing resources in cloud manufacturing environment, a manufacturing resource deployment evaluation system in construction machinery was designed and applied. At first evaluation indexes of manufacturing resource deployment were analyzed. Then the architecture and function structure were designed, and the database were analyzed. And some technologies adopted in the system were introduced to ensure security, stability, and interoperability of the information. Feasibility and effectiveness of the system were verified by a enterprise application case.

Abstract: Management system of workshop resources is one of the subsystems of Manufacturing Execution System (MES).The design of management system of workshop resources is based on its function model.In this paper the functional requirements of management system of workshop resources are analyzed and its IDEF0 function model is presented,which provide a basis for the development of management system software.

Abstract: Complex woodworking curve saw plays an important role in wood processing. In order to provide a preliminary test and verification tools for curve saw processing technology, a research on complicated curve saw movement and cutting simulation based on virtual environment was conducted. Firstly, constructed the mathematical model of all movement axis, solved the motion law of between dicing saw and work piece by matrix arithmetic. To obtain a better graphics effect in cutting process, a dynamic mesh model based on self adaptive quad-tree was put forward. Finally the simulation system was achieved in the platform Microsoft Visual Studio 2010 and OpenGL which has a good effect and can meet the validation requirements of curve saw.

Abstract: The structural character of breech mechanism is studied and analyzed in order that the virtual prototype model is the best. By the CAD software Pro/Engineer the XX breech mechanism virtual prototype is built. At first, the 3D modeling of the XX Breech Mechanism is generated with the parametric design and virtual assembling, and experiment platform of virtual prototype including all kinds of conditions is set up. At last, the quantitative analysis is performed on the above experiment platform, the experiment resulting is accord with specification data by and large, which validates that the designed breech mechanism virtual prototype is proper and appropriate.

Abstract: Portal Crane with its large parts is inconvenient to achieve physical prototype assembly in design process because of its large span and high precision space assembly needs. Considering virtual assembly system can provide designers with specific modules library, person interactive experience and reliable assembly simulation, this paper modularized the MQ4025 Portal crane based on analysis of assembly needs, and accomplished corresponding modules modeling by Solidworks, developed a virtual assembly platform by Virtools, realized collision simulation between components and parts by Collision Detection Building Blocks in Virtools, performed a virtual assembly experiment on the platform. Result shows that the platform completes Portal Crane assembly in a shorter time than physical prototype assembly, and it completes the assembly simulation faster than other CAD software by invoking compositive modules library of Portal crane.

Abstract: The author presents an approach to assist furniture engineers in generating multi-mode 3D exploded view automatically under the environment of AutoCAD platform. Based on the secondary development of AutoCAD with Visual LISP programming language, the approach proposed in this paper can allow users to generate 3D exploded view interactively, either centring on a fundamental part or just exploding the target parts. The automated procedure for generation of multi-mode 3D exploded view is explained and applied with a wooden armchair taken as example, obtaining feasible solutions.

Abstract: In the paper, the main research topic is product data exchange of each heterogeneous systems in the process of collaborative design and manufacturing under the condition of mass customization.Based on the research for existing technology of product model information sharing and conversion,put forward the solution to combine STEP with XML,completed product data transfer and exchange among web-based cooperation enterprises. Also,it was researched how to express EXPRESS data model to XML, as well as its application in the network environment, the function of converting STEP Part21 physical file to XML file was realized.