Applied Mechanics and Materials Vols. 58-60

Abstract: Based on demand uncertainty, the paper studies inventory management decision of two competing supply chains from the perspective of customer service. The paper mainly discusses two different inventory strategies, which are widely used, that is, consignment stock and VMI, and analyzes the optimal policies under three competitive scenarios, which consist of using consignment stock in both supply chains (CC mode), using VMI in both supply chains (DD mode), and using consignment stock in one supply chain but VMI another (VC mode). The paper compares equilibrium inventory level and profit of supply chain in different competitive modes, and concludes that both supply chains use VMI is equilibrium, which means that when manufacturers have right to choose inventory management policy, they prefer VMI. But it isn’t paradoxical with the phenomenon that consignment stock is common in reality, because manufacturers are forced to use consignment by retailer’s channel power.

Abstract: In order to solve the problem of interactive communication between virtual reality development platform Virtools and serial port peripherals, the software development framework of Virtools, modular development technology and serial communication technology based on Windows were studied. A serial communication modular was developed that extended the development of Virtools in serial data communication. Finally, the availability of the modular was tested with the serial testing tools.

Abstract: Information technology greatly facilitates our lives, and at the same time, people are able to invade personal privacy more easily than never before with the aid of recent technological advances. Reasons for this are discussed. Different protection models to meet the challenge are compared and a proper and improved one is proposed.

Abstract: According to environment characteristic of airport terminal, a simple and feasible global localization method of terminal service robot based on PTZ vision is presented. Terminal signs are searched intermittently along “S” trajectory and zoomed by PTZ camera. To sight them accurately, the PTZ vision behavior based on fuzzy logic controller is designed. Then the signs will be identified based on SIFT features, and the global location of the robot can be finally gotten according to their location information and geometric pattern. The validity and practicability of this method are confirmed by actual robot experiments.

Abstract: Aviation safety information is the foundation of implementing safety operation, risk control, safety performance monitor, safety decision to the airport. This paper firstly expounds the background and significance to the system; then it analyzes the present research situation at home and abroad and discusses the whole system processing flow; finally it puts forward the system architecture and primary function design. The system construction is helpful to improving the scientificity and systematicity of airport safety management, perfecting the long effect mechanism which driven by safety information and taken risk management as core, continually increasing airport safety management level.

Abstract: Focused ion beam (FIB) system is a powerful microfabrication tool which uses electronic lenses to focus the ion beam even up to nanometer level. The FIB technology has become one of the most necessary failure analysis and failure mechanism study tools for microelectronic device in the past several years. Bonding failure is one of the most common failure mechanisms for microelectronic devices. But because of the invisibility of the bonding interface, it is difficult to analyze this kind of failure. The paper introduced the basic principles of FIB technology. And two cases for microelectronic devices bonding failure were analyzed successfully by FIB technology in this paper.

Abstract: To meet large-scale and time-sensitive needs of navigation Satellite enhance information distribution network in Global Position System(GPS)/Beidou and other systems [1], use small-world network model of complex network to study the topology. Small-world model has a large clustering coefficient and smaller average shortest path length so it can meet performance requirements better. Use Python language to product WS model, and simulate the important parameter-the average shortest path length. Use Dijkstra parallel algorithm and sparse matrix storage method to simulate under the use of X10 parallel language. Analyze the relationship between average shortest path length and random reconnection probability. Additionally, simulate in parallel MPI library and compare the two.

Abstract: Statechart has been utilized as a visual formalism for the modeling of complex systems. It illuminates the features on describing properties of causality, concurrency and synchronization. In this paper, we try to describe a behavioral logical operations language by using Statecharts. The logical operation is a data structure that is used to represent by a Boolean function. This paper used them to analyze the models which are modeled by using Statecharts. Their formalism provides a concept of propositional logic for presenting control strategy. Finally, an example of level crossing traffic control systems is examined successfully.

Abstract: This paper proposes an improved scheme of FHMIPv6 (Fast Handover for Hierarchical Mobile IPv6). Using buffer tables to store the information of CoA (Care of Address) and tunnel between MN (Mobile Node) and MAP (Mobile Anchor Point), when MN returns to PAR (Previous Access Router) in a certain period of time, the system would directly use the information in the related buffer records to complete the handover and skip the steps of configuring CoA and establishing tunnel, so MN can rapidly connect to the access router, thus reducing the handover latency.

Abstract: Three-dimensional imaging lidar can offer the range information and CCD camera can offer the color information of the target. These two information can strongly supplement each other, the fusion of them is becoming a research hot point. The major problem of fusing lidar data and camera data is the coordinate calibration between them. In consideration of the traits of lidar and camera, a new planar object calibration method was proposed, which solves extrinsic matrix using the normal of planar objects. The rotation matrix and transfer vector are solved separately, which can simplify the calibration process and highly improve the calibration precision. The improved extrinsic calibration method was applied on texture mapping and reverse mapping, which show that our algorithm can gives good results.