Advanced Materials Research Vol. 978

Abstract: This paper presents an improved RFID anti-collision algorithm, which is on the basis of the bit-locking backoff anti-collision algorithm. A method of sending 2 bits length collision information,is used in the recognition process.The reader determines whether the quadtree strategy is adopted according to the collision information of the “00”,“01”,“10”,“11”, effectively reducing the null operations. The proposed algorithm is analyzed carefully in account, transmission delay and throughput of the system. Simulation results show that the improved algorithm have better performance compared with the same class of anti-collision algorithm, which is more suitable for multi-tab environment.

Abstract: Aiming at different sub-grid models of large eddy simulation, numerical simulation of aerodynamic noise caused by rearview mirror was conducted by the large eddy simulation. Compared with experimental data, the results of four sub-grid models on rearview mirror simulation have the difference respectively. Studies have shown that simulation result using the Dynamic Stress Smagorinsky-Lilly model is closest to the experimental data, and the other three models have larger error. Using the Dynamic Stress Smagorinsky-Lilly model in large eddy simulation for predicting aerodynamic noise of rearview mirror is effective and feasible, which can be used as reference for subsequent rearview mirror wind noise prediction.

Abstract: After entering the 21st century, with tourism booming in China, tourism management issues also emerged, especially in the Information technology, the study of tourism management systems is increasing in recent years. This paper designed applied-information technology in travel management system based on J2EE, tourism management business processes, and functional requirements in-depth study. Ultimately, the overall architecture and detailed structure of a complete branch of tourism management systems are designed and detailed study of the functions of its various modules.

Abstract: The rapid development of technology and information provides learners with a better learning environment with advanced means,which causes a big change in learners’ learning style and an impact on their learning outcome. This paper aims to explore the effect of electronic materials with information system on learners’ learning style, especially learners’ autonomous learning. Results from a 16-week experiment and an interview show that well-designed electronic materials do exert great influences on learners’ learning style, which can not only boost learners’ independent learning but also the learning effect.

Abstract: Electronic commerce recommendation system can effectively retain customers, effective means to improve the electronic commerce system sales. This paper first analyzes the E-commerce recommender system based on ontology, and applies it to the clothing e-commerce website customer relationship management and personalized commodity recommendation; semantic structure through ontology has to commodity recommendation. The paper presents design and implementation of E-commerce recommendation system based on ontology technology so as to effectively improve customer satisfaction.

Abstract: Wireless sensor networks with node calculation ability is weak, node power (battery provides) Limited, routing algorithm of wireless sensor networks should be the energy saving and simple algorithm. Ant colony algorithm shows good search results in the discrete solution space. This paper improves the ant colony optimization algorithm. The paper presents analysis of routing protocols for wireless sensor networks based on improved ant colony optimization algorithm, and the simulation results verify the effectiveness of the improved algorithm.

Abstract: The prediction problem of water according to the characteristics of campus, the general steps combined with neural network modeling method, BP neural network was selected as a basis for modeling. In this paper, the monitoring system GPRS technology and campus water supply network are combined, and the establishment of a burst pipe fault analysis model. The paper presents application of BP neural network and GPRS in design of supply water management information system in campus. Experimental results show that the proposed method has high efficiency.

Abstract: Smart grids have a close relationship to advanced sensing technology and communication technology and also have provided a new application platform for wireless sensor networks. From wireless sensor networks research development and characteristics, combined with current status of wireless sensor networks applications in power system, this paper describes its key technologies of wireless sensor networks, then analyze applications and data analysis of the wireless sensor network in the smart grids.

Abstract: Based on the Bluetooth specification and profiles, this paper discussed the concept of 3-in-1 phone and the design and realization of two versions of Bluetooth PSTN gateway and audio terminal developed by the authors. First, this paper illustrates the characteristics and innovation of PC version of Bluetooth protocol stack developed by us, which includes the design and realization of Virtual Operating System (VOS) and such methods as bytes sequence and bytes alignment shield, and discusses the development of equipments. Then, the design and realization of embedded PSTN gateway and audio terminal are discussed, the realization of embedded software and PSTN gateway that supports multi-terminals are emphasized. Finally, the application prospects of PSTN gateway and audio terminal are introduced.

Abstract: This paper uses the real options approach to conduct research on the coal resources development investment decision by literature studies, the combination of theoretical research and practical research. It has carried on the systematic overall retrospect to the domestic and international research results about real option. It introduces and analyzes the real option theory on the basis of analyzing and appraising to the traditional investment methods systematically in detail. This paper has studied the value of the investment project again with the real option theory. It sums up the application area, step and analyzing frame of real option theory, and analyzes the insufficiency of the traditional investment decision on the basis of comparing with traditional coal resource investment decision, and proposes some improvement suggestions.