Applied Mechanics and Materials Vols. 155-156

Abstract: Currently Computer Supported Cooperative Work (CSCW) has become an important area of research in computer science. The main purpose of CSCW system is to support people interact cooperation, and collaborative awareness between users must be the basis for multi-user collaborative work, and each user's behavior or the operation of the shared object should be immediately perceived by other users. Therefore, collaborative awareness is one of the key issues to be resolved in CSCW system. In this paper, collaborative awareness models are the object of study, and we discussed the collaborative awareness models respectively based on space, role and event, and a lot of critical theories and techniques about them. The analysis of existing theory helped us to further understand various collaborative awareness models, to study the development trend of them, and establish the appropriate framework for collaborative awareness.

Abstract: Making quality control in the design stage can greatly improve product's robustness and save costs. The whole system function variance model and the sensitivity index model are established combined with axiomatic design and then making comparative evaluation to them combined with information axiom. A fundamental model of describing relationships among function and structural characteristics, design parameters and uncontrollable factors in non-linear systems which based on Taylor expansion is proposed. And then the relation between robust design, information axiom and the concept of information is expounded. The solution to information amounts can be used as the evaluation index to the result of robust design. Finally, combined with coating head example show that the method can optimize design parameters reasonably, reduce design time and cost effectively under the premise of meeting product performance.

Abstract: Heat conduction in anisotropic materials has important applications in science and engineering. In this paper the virtual boundary element method (VBEM) is applied to solve these problems. Due to the fact of a virtual boundary outside the real boundary, the VBEM does not need to treat the singular boundary integrals, and thus, is more accurate and convenient than the traditional one. Numerical examples are presented, to demonstrate the efficiency and accuracy of this method.

Abstract: To make the word similarity calculated results more reasonable and accurate, a new word similarity algorithm is proposed. It uses HowNet primitive hierarchical tree structure, and calculates the two primitives’ distance with the method computing WordNet node distance which considers the tree depth, density, path and connecting intensity, etc. Moreover, algorithm also improves the method that distance into similarity. Finally, this algorithm is compared with related algorithms through experiment. The results show that the proposed algorithm effectively improves the precision and accuracy of word similarity calculation.

Abstract: A time-dependent particle code has been developed to simulate the motion and changing regularity of particles in multi-beam traveling wave tube. Magnetic focusing and interaction models of multi-beam traveling tube were established, and static magnetic field was calculated. The process of bunching particles by periodic permanent magnetic focusing system and beam-wave interaction was also simulated. The results show that particle simulation can really reflect the motion of particles in multi-beam traveling wave tube, which can provide some references for particle study of traveling wave tube.

Abstract: Based on the study of SAE J1980-2008 and FMVSS 208, MADYMO7.1 is used to establish a Multi-body and FE model for two OOP children, and the statistic test is implemented to verify the accuracy of the model. The airbag parameters impacting OOP children greatly and their ranges are selected to determine the objective function. With the Latin Hypercube Sampling method, the Kring approximate model is constructed, and multi-island genetic algorithm is used in subsequently parameters optimization. The results show that the proposed optimization method can provide effective protection for 6-year-old OOP children.

Abstract: The single point login and unified the identity authentication of the existing schemes of further research, realize the campus network based on single point login and unified SAML(Security Assertion Markup Language)identity authentication system. Digital campus requirements before the application of various independent integration system, so first must undertake unity identity authentication, such, users in the visit of the campus network resources and application system, just log on a campus network, can be achieved in the user rights within the entire network roaming and avoid a repeat of the user login and information redundancy.

Abstract: To study one of the problems that Romania number theorist F. Smarandache has proposed and to generalize it. For any positive integer let denotes the natural sequence where each number is repeated times. Based on the general term formula, the asymptotic properties of this sequence and some hybrid functions are studied using the elementary method, the asymptotic formulae are obtained ,thus enriching the study and application of this sequence.

Abstract: In this paper we present a supporting roller producing steel tube AS/RS (Automated Storage & Retrieval Systems) system based on the finite element analyzing of shelf structure and logistics optimizing of system layout. The cantilever beam structure of steel tube AS/RS shelf is different from normal type and the strength of shelf is one key point in design. Based on the data of raw/residual steel tubes, we first set the dimension and type of the shelf and beams, and then the finite element analysis is used in single beam design and whole shelf structure strength analysis. Based on the characteristics of steel tube manufacture and the requirements of processes connection, one U type production line is given. The practical application indicates that the mechanical strength, logistics efficiency and flexibility of the AS/RS system we designed accord the needs of manufacture.

Abstract: This paper studies the extended Hofer norm of hamiltonian homeomorphisms on the symplectic quotient by a compact Lie group.The hamiltonian property is proved for the maps under the symplectic reduction, and the relation between the hamiltonian homeomorphism’s extended Hofer norm and the induced one is also shown in the new sense