Applied Mechanics and Materials Vols. 63-64

Abstract: This paper analyzes the basic principles of ant colony algorithm,Grid Resource Discovery Method is proposed based on the ant colony algorithm. Applying the domain to organize grid resource, and keeping the dynamic resource up to date by adding the domain node and updates. Using the improved ant colony algorithm to discover the inter-domain resource, avoid repeated search process, and achieve quick search of resources.

Abstract: This paper established the total error model of Anti-Radiation Missile under condition of target radiation source shutdown, which includes three dimensional passive location error model using information of azimuth and elevation angle as well as their changing rates, and gyroscope drift error model of Strap-down Inertial Navigation System. By analyzing the three dimensional passive location method to moving emitter using single stationary observer, the paper had a research to the hit probability of Anti-Radiation Missile under various flying conditions. If higher hit probability is required, the missile should increase its azimuth and elevation angle as much as possible while not to overstep its attack angle. Simulation result showed that the shutdown occasion of radiation source did much influence to the hit probability of Anti-Radiation Missile, which has great meaning to improve he bat efficiency of Anti-Radiation Missile.

Abstract: A broadband microstrip patch antenna with multi-layer substrate for fuze application is designed. The multi-layer substrate is composed of the bottom layer of Si with low electric conductivity, the middle and the top layers of Si with high electric conductivity. An air cavity is fabricated by inductively coupled plasma (ICP) etching in the middle layer of Si to reduce the effective dielectric constant of the multi-layer substrate. The multi-layer substrate microstrip patch antenna is simulated and optimized by finite element method. The simulation results show that operating at 10GHz, the bandwidth and the gain of the multi-layer substrate microstrip patch antenna are 15.5% and 6.1dB respectively, which meet the needs of the application in fuze well.

Abstract: In ensemble learning, in order to improve the performance of individual classifiers and the diversity of classifiers, from the classifiers generation and combination, this paper proposes a kind of combination feature division and diversity measure of multi-classifier selective ensemble algorithm. The algorithm firstly applied bagging method to create some feature subsets, Secondly using principal component analysis of feature extraction method on each feature subsets, then select classifiers with high-classification accuracy; finally before classifier combination we use classifier diversity measure method select diversity classifiers. Experimental results prove that classification accuracy of the algorithm is obviously higher than popular bagging algorithm.

Abstract: Grid security is one of the core issues of grid computing, and the authorization issue of grid security is a hot topic of current research. This paper describes three sequence patterns of the authorization, and focuses on the architecture of push sequence model and application example-Community Authorization Service (CAS). It analyzes and compares the push sequence pattern and pull sequence pattern. Authorization mechanism based on push sequence pattern solves the scalability issue of GSI quite well in some extent and improves the flexibility of the system.

Abstract: The cold fusion at room temperature is used to repair the shaft of automatic transmission. In the experiment, the low-carbon steel, the high-carbon steel and 65Mn steel were selected as restorative materials. The microstructures of shaft repaired with different materials were observed by the scanning electric microscope (SEM) after the shafts were repaired. The results show that the microstructure of shaft which was repaired by the high-carbon steel and 65Mn steel is martensite that has high hardness and better wear resistance. The interface of the matrix and filled material is metallurgic combine. The cold fusion can improve the surface properties of the matrix when the suitable material is selected as restorative material.

Abstract: Feature recognition is the key technology in establishing auto body panel CAPP system. Hole features and draw boss features has been classified according to their forming and function properties in this paper. Recognition algorithms have been developed for hole feature and drawing boss feature, which can also distinguish two dimensional hole and three dimensional hole, and differentiate circle hole and non circle hole automatically. The algorithms can also recognize the drawing bosses and judge whether the boss has holes. Furthermore, the algorithms can give out the parameters of hole and drawing boss recognized, such as radius of circle hole, minimum radius of curvature of shaped hole’ boundaries, the parameters of hole in the drawing boss, the edges’ ID of the hole and the surfaces’ ID of the boss.

Abstract: Embedded systems are the most popular computer application systems. Their applications have changed life of people in the world. They can be found anywhere, and almost can be used in every field. But few people know the concept of an embedded system. In this paper, the concept and definition of embedded systems are discussed and analyzed. A considered concept of embedded system should include several factors, computer core, to build in, managed object and relevant software, despite to issue a consistent definition is difficult.

Abstract: Forecasting the weather diseases is a complex process with strong uncertainty. In order to improve the forecast accuracy, the paper proposed a sort of forecast model for weather diseases based on the artificial neural network. By means of ANN, lots of sample data could be trained so as to optimize the connecting weighting value of ANN, finally the forecast effect of weather diseases has been intuitively verified by experiment simulation. The factor resulted in weather diseases could be the following weather parameters, such as temperature of a day, relative humidity, air pressure, wind speed and so on. The paper takes respiratory disease treatment records as an example, the simulation result points out that it is consistent between the change trend of being sick and the actual situation. The study result shows that the model is reasonable and feasible, and could forecast weather disease more effectively.

Abstract: A proprioceptive mechanism of vehicle driving simulator is proposed to realize pitch, roll and vibration action of vehicle driving simulator based on application foundation of proprioceptive mechanism. The proposed mechanism has very simple structure and a brief description of this mechanism is given. The proposed proprioceptive mechanism is established based on CATIA V5 platform by using the virtual prototyping technology. The CATIA V5 motion simulation model is used to simulate the proposed proprioceptive mechanism by setting the parameters of source motion input and motion interference and motion characteristic is analyzed to provide design basis. The kinematics simulation results show that the designed proprioceptive mechanism for vehicle driving simulator can realize the design requirements and complete the proprioceptive actions.