Applied Mechanics and Materials Vols. 385-386

Abstract: The classical Montgomery ladder algorithm (MPL) is an effective way to improve the operational efficiency of elliptic curve cryptography. First, an improved MPL is proposed by loop unrolling, and then the Montgomery elliptic curve encryption and decryption process is realized using data parallel and task parallel. The experimental results show that the ratio of acceleration parallel processing efficiency can reach 70%, and the method can effectively improve the speed of elliptic curve encryption algorithm.

Abstract: An efficient identity-based (or ID-based) multi-signature (IBMS) scheme from RSA is proposed based on a variation of the Fiat-Shamir signature scheme. The proposed scheme with fixed signature length has a much more efficient signing procedure. Each user can sign a different message; subsequently a set of signatures can be turned into a multi-signature via an aggregation process which may be executed by any entity. Also the multi-signature verification time of modulo exponentiations required is the same as that of a single signature. And the proposed scheme can be proved to be secure against attacks from the adaptive given identity attack, chosen message attack and multi-signer collusion attack.

Abstract: The equipment system of systems (ESoS) construction risk analysis is great significance to enhance decision-making and management level of information technology ESoS construction. The concept of "entropy" in the information engineering is using to calculate the entropy, and the entropy weight is used to fix subjective weight, after that Combining ideal point method to evaluate and select the schemes, the best decision of ESoS construction is get. The model is of impersonality and in reason, which provided a simple and practical method for construction risk evaluation of electronic information ESoS.

Abstract: Traditional workflow engine is lack of flexibility when applied to product design process, therefore this paper designs a flexible workflow engine based on B/S architecture. Firstly, this paper analyzes the product design process and its flexibility need, then analyzes and designs the framework of the flexible workflow engine. In the framework of the engine, dynamic modifier module is an important part to realize the flexibility. Secondly, this paper illustrates the operation process of flexible workflow engine with a product design case to verify its applicability and effectiveness.

Abstract: In order to meet the development of economic globalization, a gearbox manufacturers need to optimize the production management through using digital factory technology to improve their market competitiveness. According a transmission production line industry characteristics and business processes, the digital factory information systems integrate ERP, MES and ANDON system making the real-time information flow. The system has been actually run in the company, passed technical appraisal and meet the design requirements.

Abstract: According to the characteristics of manufacturing execution system and transmission manufacturing industry (MES) demand, the MES software architecture based on OPC Technology, establishment of real-time visualization of the gearbox assembly process based on workflow, real-time production process tracking, real-time and interactive technology of PLC framework. The system can meet the requirements of mixed production line, guiding device, realize the flexible production. The development of MES system has been applied in a transmission line and stable operation.

Abstract: According to the characteristics of the discrete manufacture enterprise, analyze the existing problems in modern enterprise of production process , Develop a digital factory integrated information system which is suitable for manufacturing enterprise , Put forward the necessity of PDM/MRP/ERP for manufacturing enterprises , MES system is analyzed emphatically in the digital factory integrated information system which is of great importance and indispensability, Digital factory integrated information system adopts modular development technology, And have applied in some manufacturing enterprise.

Abstract: The layout of parts is vital for a prototype, its rationality can be analyzed by generating maintenance path of removable parts. Based on the coordinate-oriented algorithm, a path-planning method for removable parts in a prototype was presented. Firstly, The entire product environment was classified into two parts of the free space and limited space. Secondly, software about maintenance path generation was produced. Lastly, the feasibility of the algorithm and software was confirmed by application in a prototype.

Abstract: At present, because of the extensive production management and backward information management, the coal mine enterprises require a shift to intensive management. The establishment operation management of digital system of coal enterprises can help the enterprise to realize the digital management, improve the market competition ability, promote the enterprise strategic management ability. The realization of this system can help to solve the main problems such as the difficulties of business process management and summary, unable to effectively control the business process, lack of process and cooperation difficult, difficult of business analysis. Therefore the establishment of operation management of digital system of coal enterprises becomes a pressing matter of the moment.

Abstract: Based on resource allocation problems, the article explored the upgrade informatization investment theories and methods of bi-level programming method. It is used to construct resource allocation model of informatization promotion investment, in order to provide useful reference for the informatization investment research in the future.