Applied Mechanics and Materials Vol. 389

Abstract: For the purpose to realize information collection, collation, transfer, tracking and execution required by Hunan Urban Construction College to carry out the function of scientific research and management, and through the re-definition of the workflow process definition, we combine the modeling technology of Petri net and the workflow technology to design the amendment of the workflow process and the storage mechanism. Also we design the data structure of the workflow engine, hoping to make breakthrough on both thoughts and measures for the realization of the research management & information system.

Abstract: In order to guarantee the operation safety, maintenance and servicing to the EMU often need to stop high voltage power supply, and switch to the ground power supply. This paper proposes a ground power information system of EMU, in this system, industrial field bus is composed of the single-phase power box, socket box and gateway, it is connected to the centralized control cabinet and the self-diagnostic terminal through the hub that constitute the information network, to realize the free transfer and exchange of data, and the centralized information management and control of the whole system, has a good promotion prospects.

Abstract: In this paper, according to the characteristics of nonlinear equations. A Novel Firefly Algorithm was used to solve the systems of nonlinear equations, the algorithm was experimented and the experimental results show that the new algorithm to be successful in locating multiple solutions and better accuracy. Simulations and results indicate that the novel firefly algorithm has better feasibility and validity for continuous space optimization and discrete space optimization.

Abstract: Configuration and algorithm of BP neural network and characteristics of MATLAB programming language are introduced in this article. Establishing BP neural network becomes easy with relevant functions of design, training and simulation of neural network provided by neural network tool kit of MATLAB. Users can call relevant programs according to their own requirements without being bothered about writing huge amount of algorithm programs. This paper discusses the methods and procedure of designing BP neural network with MATLAB neural network tool kit in detail. Optimization of combustion characteristic of Mg/PTFE fuel-rich pyrotechnical propellant was taken as an example to verify the feasibility of the approach.

Abstract: Traditional medical image enhancement method has some disadvantages. They can not significantly improve the medical image edge, texture and detailed information. Besides the enhancement effect is susceptible to interference noise information. This paper proposed enhancement algorithms combining bidimensional empirical mode decomposition and the wavelet edge enhancement method. The first step is using the method of bidimensional empirical mode decomposition to process medical image, achieve image information with different frequency. And then our method using wavelet transform to enhance different frequency image edge, texture information. Through the comparison of proposed method with the existing method, it has been verified the proposed method has a better effect in the detail enhancement of medical images.

Abstract: ECG machine, currently on the market are generally not a function of the T-wave alternans detection analysis. Studies have shown that T-wave alternans can accurately predict sudden cardiac death, higher predictive accuracy in the case of combination of left ventricular ejection fraction (Left Ventricular Ejection Fraction, LVEF). This paper presents the design of function modules of T-wave alternans software based on the QT environment. Focus on the data processing module of the software, such as the QRS wave detection, T wave detection, the matrix of the T-wave extraction, T-wave alternans detection.

Abstract: A new calibration method for camera interior orientation parameters is proposed using the known spatial coordinates and the corresponding single photo. Firstly, principle point coordinates, principle distance and exterior orientation parameters are solved by the direct linear method without consideration of distortion parameters. Then, accurate interior and exterior orientation parameters are refined through the process of nonlinear optimization, during which the distance of spatial point to corresponding ray are minimized. Distortion factors of radial distortion, tangential distortion, affine distortion and non-orthogonal distortion are taken into consideration. This paper uses Levenberg-Marquardt optimization method to avoid inaccurate initial parameters influence upon the process of convergence.

Abstract: Based on fractal theory and WZ model of gas discharge, The spacial temporal behavior in discharge process from Thundercloud to Ground was simulated efficiently. Moreover, we discussed the probability index and the field intensity of the discharge path and their influence on the fractal dimension and the discharge path., and pointed out that the research should focus on the relation between the probability index and the fractal dimension.

Abstract: In order to the integrated design of the geometric parameters and drawing the pulley parts, based on R & D platform of the VBA with the CAD software, hence after analyzing the selection belt type, determine the reference diameter of the belt pulley, choosing length and the amount of the belt, and designing and drawing the pulley parts, in which include the drawing the tooth of v belt pulley, chamfers and grooves, keyway, hatches, and part dimension, etc. Conventional belt drive system is successfully developed. The design results show that the program is running smoothly, the result is correct with the friendly interface, it can provide a convenient tool to rapidly design of project for the belt drive system.

Abstract: This work resolves a real problem of assembling the hold-on component unit with the main product item by closing the riveting operation integrated in the manufacturing process. The finalized component will be used for assembling the newest model power switch in production of this corporation. In this diploma work some possible variants will be provided. The workable solution of the best one will be suggested as a final mechanical problem resolution with detailed description of construction description, component selection and skeleton program design to build a special purpose machinery.