Key Engineering Materials Vols. 460-461

Abstract: The verifier-based key exchange protocol for three parties deals with the authenticated key agreement process between two clients with the help of a trusted server who have to store their verifiers in the server for authentication. Recently, Liu et al. proposed a key exchange protocol for three-party based on verifier authentication and claimed that their protocol could resist many familiar attacks. Unfortunately, we find out that the proposed protocol is insecure against off-line guessing attack and impersonation attack. In this paper, we conduct a detailed analysis on the flaws of Liu et al.’s protocol. In addition, a new protocol is presented with security analysis.

Abstract: Many studies reported that servers become aging after running a long time and the efficiency of server cluster system will degrade. This paper mainly focuses on modeling and analysis of dynamic load balance strategy adding software aging parameter into dynamic load balance strategy. Adding software aging into load balance strategy is proposed for the first time in this paper. A software aging algorithm based on robust locally weighted regression (Loess) is deployed to estimate aging trend and the threshold point used to compute software aging parameter. Experiments verify the effectiveness of the algorithm presented in this paper. The conclusions drawn from this paper will greatly benefit the application of software rejuvenation technique into load balance strategy, that is, it makes it easy to determine when to perform software rejuvenation in a server before it reaches the downtime. The results for the cluster system show that performance of the cluster can be effectively improved.

Abstract: With a wide range of applications of free-form surfaces, the inspection of them is becoming critical, though it is difficult. A model inspection method for products with free-form surfaces is proposed in this paper, and the key process is described in detail including data import, data matching, and error comparison. The inspection results are not only displayed with color cloud map, but also the error values of the specific points can be displayed explicitly in the table. The experiment results by applying the method to a car lamp show that the proposed method is efficient and it can provide a reference to modifying the product for designer.

Abstract: A continuous non-stationary load spectrum of wheel loader transmission was obtained from field testing by a special test system, including time-history of torque, speed, oil pressure and gears. During the data processing, each work cycle was divided into six steps: no-load forward, shoveling, heavy-load back, heavy-load forward, unloading and no-load back with considering the characteristic of gears, torque and oil pressure signals. Discretization, Butterworth filter and the singularity rejecting were adopted to analyze the load data of each step, from which the non-stationary random signals were translated into the pure stationary load signals. The time-history load testing method and data processing of random load spectrum of transmission was presented.

Abstract: Since the 90s of last century, learning organization as a new organizational mode is highly prized by the management scholars all over the world. It is considered as a new trend and an ideal mode of the global organizational management in the knowledge economy era. In consideration of learning organizations with attributes of complex system, the theory of complex adaptive system provides a possible route on methodology for the study of its organizational change. This paper starts from the view of complex adaptive system theory, analyzes the initiative, adaptability of the learning organization and its interaction with the environment. It assumes that with the constant change of the performance parameters, functions and attributes of the organization, the entire organization mode and the structure will also change. Furthermore by constructing a complex adaptive model of learning organization, this paper elaborates the organizational change process, and extracts the information communication, organizational mood, leadership style and organizational knowledge as the impact indicators. The conclusion of this research has some significance as reference for those who try to improve the level of the adaptability of organizations in the various changing environment.

Abstract: Today the industry cluster in developing countries comes to the bottleneck which is “big but not strong” because of excessive reliance on cost competition and lack of innovation ability. Therefore, industry cluster in space does not mean the economic competitive, the innovation network is the source of competitive advantage in the cluster. Gradually, how to promote the innovation network of industry cluster in developing countries becomes an urgent problem to explore and solve. In this paper, we review the knowledge network in the industry cluster and the weighted complex network, analyze the mechanism of cluster innovation, and at last give the tactics in order to create continuous momentum for the cluster innovation. The conclusion of this paper has some significance as reference for those policy-makers who try to improve industry cluster innovation.

Abstract: Micro-electromechanical systems is called MEMS for short, it is the product of mutual integration for the micro-electronics and micro-mechanics, which covers mechanical, electrical, physical, biological and other modern technology. MEMS packaging is a key technology that has been developed based on electronic package technology. In order to strengthen the development of packaging process of MEMS, in particular, which are low cost, materials and packaging technology and has an ideal effect. The characteristics of MEMS packaging technology based on MEMS technologies are introduced, and the future development tendency and application of MEMS device packaging are previewed in this dissertation.

Abstract: Based on emerging issues and new trends in the production safety work, This paper will reveals the characteristics of production safety accidents and laws, and explores the monitoring method of safe production run, and provides better basis of decision making for the safe production conditions can be effectively controlled.

Abstract: Taking some developed countries as comparative objects, the paper analyzed problems in the development of Chinese logistics industry, from development course, management level, techniques and equipments, service level, managerial system and mechanism, legal environment, and talents aspects. Referring the developed logistics mode of developed countries, the paper gives some advices to the future of Chinese logistics industry and logistics enterprise, including advices in terms of macrocosmic aspects and microcosmic aspects. The constant improvement of market mechanism, sustained growth of social economy, continuous perfection of laws, rules and regulations, and wide application of modern science and technology has created beneficial conditions for logistics development. As for logistics enterprises, it is extremely crucial for them to comprehensively consider various factors, and establish the logistics mode truly suitable for themselves. Therefore, the research on the countermeasures for the development of Chinese logistics enterprises has important theoretical and practical significances on promoting the scientific and healthy development of Chinese logistics industry.

Abstract: In recent years, Chinese travel companies have been following the tide of adopting e-business service. However, the development of e-business in the travel industry shall be in line with the times and occasions and travel companies shall take their actual situations into consideration. The paper carefully analyzes the strengths and weaknesses of developing e-business in Chinese tourism industry and thus put forward relevant countermeasures and trains of thought.