Advanced Materials Research Vols. 143-144

Abstract: To solve the problem of construction for stream cipher key generator and the problem of SSC/SSSC stream ciphers need to relay on the secret channel to transmit the key, it presents a new clock function drive by a clock-control sequence and chaotic cascade function made of multiple Logistic function , which are used to built the self-reference model and chaotic module; it design a adapt controller independent of the key generator and encrypt module, achieve controlling encryption and transmission process by multi-threaded code;it makes a key generator with transformation ranks and wheel key method of AES and S-box of Camellia, which makes the sub-key and the key generator`s internal station become a insufficient condition that does not need to depend on the secret channel, the model achieves a exponential growth in the key space and the same application scope of traditional SSC and SSSC model. The new protocol model features can be seen under the actual operation of modifying RC4 algorithm.

Abstract: The strain rate sensitivity of polypropylene syntactic foams with polymer microballoons in the relative density from 0.5 to 0.8 is studied at the nominal strain rate ranged from 10-1 to 102 s -1. Two equations of matrix materials are introduced to represent the viscoelastic properties, and another two equations are proposed with respect to the parameters of matrix materials to estimate the elastic moduli and yield stresses of polymeric syntactic foams.

Abstract: This paper mainly addresses the principle of the singularity elimination of the Stewart parallel platform. By adding appropriate redundant actuation, the rank of the Jacobian matrix of the parallel platform is always full, accordingly the singular value of the Jacobian matrix of the parallel platform is nonzero. Then the singular configuration of the parallel platform can be eliminated by adding one redundant actuation. Numerical examples are taken to illuminate the principle’s effectiveness. It is shown that not only singular configurations of the Stewart parallel platform can be eliminated, but also performances of kinematics and dynamics of the parallel platform can be greatly perfected by adding appropriate redundant actuation.

Abstract: The dynamic model of a 6-DOF wire-driven parallel manipulator is established, based on influence coefficient method for wire-driven parallel manipulator trajectory planning algorithm is proposed, the orientation parameters by Euler angles of moving platform of time first-order and second-order derivative which is not a moving platform angular velocity and angular acceleration is verified. For the moving platform position and orientation workspace trajectory planning, the kinematic characteristics of wires are discussed. The simulation results show that the tension of the wires are always greater than 0, the expressions of velocity, acceleration and tension of wires are exceptionally clear and simple. Also, the method of trajectory planning proposed is suitable for general 6-DOF wire-driven parallel manipulator.

Abstract: Take AT80C51 microcontroller as the control core, an intelligent mini car is designed and the testing result on its function is given. The system adopts the infrared remote control to realize the startup and halt, and use the ultrasonic sensors to detect obstacles on the road. As a result, it can realize three major functions, such as Infrared remote control, avoiding hitting the barrier, digital display of driving time and mileage. The whole system has simple circuit structure and high dependability. The testing result meets the functional requirements.

Abstract: In this paper a specific construction method based on the NS-2 software environment was studied to simulate the inter-car communication and constitutes. And the implementation methods of inter-car communication were described. The simulation traffic environment what we have described have good use to the research of relate technologies in the intelligent transportation systems such as inter-car etc., and have a important meaning to the simulation experiment of inter-car and algorithm.

Abstract: For improve the driving safety and the technology development of inter-vehicle communication, the communication system of supply two vehicles based on GPS, wireless LAN and embedded technology was researched and designed. The system could send/receive driving data information between two vehicles, and display the necessary information on LCD for drivers. In the paper, the process of the system been researched and designed was described. Two applications based on the system were proposed. The system was not only to achieve the desired functionality, but also made foundation for later research. It had great practical value, and very important for technologies research of vehicle safety and intelligent transportation systems.

Abstract: This article describes the working principle of search engine and classification, analyze the characteristics of intelligent search engine, according to the characteristics set up a work flow chart of the intelligent search engine, finally made how to apply intelligent search engine to digital library personalization services. With the emergence and development of the Internet search engine developed from the traditional to the intelligent search engine, as a new generation of information retrieval tools, intelligent search engine, relying on its own merits, is more and more applications to different fields..Web site survey showed that 75% of visits come from search engine referrals. How to effectively apply intelligent search engine to digital library, to build a digital library with our characteristics is a problem we face.

Abstract: As one of the key applied forms on Internet, E-commerce has been growing at a very high speed in China in recent years. Starting from the perspective that E-commerce consumers pursue low price while retailers try to decrease the cost. Data mining is a form of knowledge discovery essential for solving problems in a specific domain. Individual data sets may be gathered and studied collectively for purposes other than those for which they were originally created. Data mining is most commonly used in attempts to induce association rules from transaction data.

Abstract: In 2009, Zuhua Liao and his students induced rough sets into inclines. They put forward the concepts of upper and lower approximations of a subset in an incline, and studied some properties of and . This paper , based onthose researches ,investigated rough dual ideal in lattices, and discussed the properties of and when is a dual ideal, a prime dual ideal and a convex sublattice of .