Applied Mechanics and Materials Vols. 263-266

Abstract: Virtual garment design and flexible fabric simulation are the major research focuses in the field of computer graphics. The two-dimension contour design and triangular meshes generation of garments are the basis of 3D virtual garment stitching and dynamic simulation. In the development environment of VC++ and OpenGL, in this paper three kinds of design methods are used to obtain the 2D contour of garments. Based on the regular grid method, the coordinate perturbation technique and the improved Delaunay triangulation method are used to realize the triangular meshes generation of the 2D garment. In order to improve the efficiency and readability of the algorithm, the standard template library technology is also adopted. The experimental results show that this method can achieve the requirement of the real-time simulation.

Abstract: This paper presents a time Petri net model with the optimizing mechanism based on ant colony systems that addresses the problem of schedule optimization. The choice rules and pheromone update rules of artificial ants are embedded into the evolution rules of a time Petri net, so the modeling and scheduling analysis of real systems can be integrated into the same model. Compared with the approaches based on the heuristic search and genetic algorithms, our method efficiently unifies the modeling and analysis of schedule problems based on a time Petri net.

Abstract: In order to solve the syntax problem of service retrieval based on keywords, we present an Ontology-based solution for service registration and retrieval in this paper. Firstly we analyze the semantics of home service from different facets, and extract relative concepts of service to construct three domain ontologies including function ontology, content ontology and device ontology. Then, a model based on these domain ontologies has been presented. Finally the process from registration to retrieval is given in detail.

Abstract: This paper is to study the common architecture of the software development and compare the software system architecture-selection criteria. Meanwhile, this paper offers appropriate software architecture solution according to the features of data information management of the software testing organization.

Abstract: In the establishment of a virtual training system for clay pigeon system, collision detection of clay target and grapeshot plays an important role. To achieve the desired simulation effect, Vega、Creator、Visual C++ are used as development platform to model grapeshot and clay target to simulate their flight path and then the combination of classical AABB and Los technique in Vega software are applied to test the collision effect.

Abstract: Due to the poor database performance situation on Android operating system, put forward a methods of database access performance optimization. The paper first analyze the Android database access principle, architecture of SQLite and Berkeley DB, and methods of Berkeley DB in concurrent access, then put forward a method of porting Berkeley DB to Android to replace SQLite to enhance the database access performance. Finally a series of practical benchmark results shows that the porting brings performance improvement effect.

Abstract: Through analyzing the unique requirements of military command and control software and the characteristics of wireless message transmission, this paper studies a new message transmission mechanism based on wireless narrow band transmission, bring forward the proposal of improving wireless message transmission efficiency through improving the message queue transmission mechanism of the software, and verifies it in the new software version. The results show that new transmission technology greatly improves large-scale network transmission effect.

Abstract: We structured simulation model of supply safety storage by using system dynamic (SD), made computer trends simulation. Based on the result, we tentatively calculated supply safety storage.

Abstract: The research in accordance with the “description - synthesize” methodology to describe ASIP model is put forward. The executable specification described by the ADL drives the entire design process, and will be synthesized for HDL (Hardware Description Language) logic in EDA software framework to generate automatic design tools.

Abstract: Mining (classify or clustering) retrieval results to serve relevance feedback mechanism of search engine is an important solution to improve effectiveness of retrieval. Unlike plain text documents, since the XML documents are semi-structured data, for XML retrieval results classification, consider exploiting structure features of XML documents, such as tag paths and edges etc. We propose to use Support Vector Machine (SVM) classifier to classify XML retrieval results exploiting both their content and structure features. We implemented the classification method on XML retrieval results based on the IEEE SC corpus. Compared with k-nearest neighbor classification (KNN) on the same dataset in our application, SVM perform better. The experiment results have also shown that the use of structure features, especially tag paths and edges, can improve the classification performance significantly.