Advanced Materials Research Vols. 219-220

Abstract: CDMA system is the interference-restricted system, In the TD-SCDMA trunking system, using more than one scrambling in a cell introduces multiple access interference (MAI).This paper analyzes improving the performance of MMSE and PIC Detectors in TD-SCDMA trunking system with different level MAI. It can be seen from the simulation result, the joint detection algorithm can improve the performance of downlink for TD-SCDMA trunking system, and it also can help to keep the stability of this system.

Abstract: In order to recycle regenerative braking energy, we built the PHEV regenerative braking test platform with model design concept, based on the parallel hybrid structure. We proposed a regenerative braking control strategy under parallel braking force distribution, and established the mathematical models for main elements of the platform. In order to confirm the performance and the operational reliability of the platform, simulation models of the regenerative braking system were built in MATLAB/Simulink by combining the test data with mathematic models. We chose universal NEDC drive cycles for simulation, and the results indicated that the regenerative braking energy was effectively recycled. The structure and control strategy of regenerative braking test platform was proved to be rational.

Abstract: Springback radius is a very important factor to influence the quality of sheet metal air-bending forming. Accurate prediction of springback radius is essential for the design of air-bending tools. In this paper, a three-layer back propagation neural network (BPNN), integrated with micro genetic algorithm (MGA), is proposed to solve the problem of springback radius. A micro genetic algorithm is used for minimizing the error between the predictive value and the experimental one. Based on air-bending experiment, the prediction model of springback radius is developed by using the integrated neural network. The results show that more accurate prediction of springback radius can be obtained with the MGA-BPNN model. It can be taken as a valuable tool for air-bending forming of sheet metal.

Abstract: According to the shortcomings of higher strength labors and lower accuracy data of manual methods to collect origin destinations, methods based on mobile phone equipped vehicles to collect dynamic origin destinations are very popular for the fact of large number of users and advanced location technology of mobile phone. However, the existing methods can not meet the requirements to users for the key technologies involved are not adequately effective. Consequently, a new method for collecting dynamic origin-destinations based on mobile phone equipped vehicles is designed, in which two key technologies are researched especially. The results show that the method put forward can produce origin-destinations with higher quality, which will provide reliable decision information for traffic management.

Abstract: SaaS (Software as a Service) application mode came into being along with the expansion and convenient of the network platform, and its core lies in Multi-Tenant (multi-tenant) application. Multi-Tenant Application under the SaaS model makes software applications efficient and convenient, more importantly, tenants can greatly reduce their software development costs, hardware acquisition costs, training costs, and upgrade and maintenance costs by using the application system, which virtually eased business cost pressures and makes more focus on business development. This paper elaborates the personalized needs of tenants for Multi-Tenant Applications mainly from the three aspects: data, function, and interface. With the configuration of data, function and interface, Multi-tenant applications will become better.

Abstract: The popularity of 3G networks makes revolutionary changes occurred in M-learning, which enables us to do real-time video and audio learning and interactive video and audio learning. The article put emphasis on how to protect video and audio data transmission and the quality of M-learning.

Abstract: Distributed Material Requirements Planning is widely used in manufacture enterprise. The decentralized decisions of purchasing and warehousing can be coordinated by Distributed Decision Support Systems. Distributed Decision Support Systems can improve flexibility to make right decision instantly.

Abstract: In order to effectively implementing the organization and management of large-scale sport events, and carrying out the important role of project management during the events, by integrating the use of research methods such as system science, management science, information technology, we designed a information system for large-scale sport events based on project management. In this paper we systematically discusses the characteristics of large-scale sport events based on project management, explores the application goal of information system for large-scale sport events based on project management, and on this basis we elaborates comprehensively on the system’s functional requirements, framework, functional structure, and other major issues during the execution.

Abstract: While many past studies focus on “smart home” research, little is known about this stream of research. Begun as an effort to assess the trends and contribution on the field of “smart home”, this study surveys 465 smart home publications appearing in 194 journals from 1997 to October 2010. In this study, we define the keywords and do the inquiry to search the related articles in ISI Web of Science (WOS) database and present our findings, such as categorizations of article types, key publication venues, and the trends of publications by years. Our study showed that the amount of articles about “smart home” increased from 1997 to 2010, which indicates that smart home’s influence is on the increase. We also find that “smart home” research has attracted numbers of researchers during the fourteen years covered in this study. Researchers from America, Asia and Europe have made the most contributions to this fielding in our findings. This study offers a snapshot of the field of “smart home” and raises a number of questions for future research on related topics.

Abstract: Finite element simulation is an efficient method for studying factors affecting weld-induced residual stress distributions. In this paper, a validated three-dimensional finite element model consisting of sequentially coupled thermal and structural analyses was developed. Three possible symmetrical welding sequences, i.e. one-welder, two-welder and four-welder sequence, which were perceived to generate the least distortion in actual welding circumstances, were proposed and their influences on the residual stress fields in a thick-walled tee joint were investigated. Appropriate conclusions and recommendations regarding welding sequences are presented.