Abstract: Based on the background of a high tower structure under environment random excitation, large-scale complex system parameter identification based on Polymax method is presented in this paper. Firstly,the system of testing environment excitation response signal for large tower is designed.Secondly,the obtained signal is analysed and intercepted,then the ideal signals are selectted from each experiment. Lastly, the intercepted signal is identified for some parameters based on polymax method.The obtained result shows that the former is effective.
Abstract: Image mosaic (Mosaic) for a given image sequence is the first image sequence alignment positioning, and then fusion spliced to produce a seamless, high-resolution large-scale scene images. This paper discusses the calculation model in the wavelet transform in image processing and wavelet transform image stitching. This paper presents the optimal image mosaic method based on Wavelet transform and introduces a seamless optimization algorithm based on wavelet transform and its validity through a concrete example simulation.
Abstract: The difficulty of car ABS system on the teaching analysis, design, automotive brake simulation control system based on virtual technology through Labview software and data acquisition card with the host PC, as well as control the drive circuit and the sensor circuitdesign, car braking process simulation, the composition of the ABS system, the structural and mechanical connection between the real show, but also by the ABS system failure code corresponding to the fault simulation settings for simulation training in diagnosis and exclude vehicle use and maintenance of the common failures of the ABS system. The results showed that: automotive brake hardware circuit design, simulation control system is reasonably practicable, the control strategy used by the software is correct and effective, stable and reliable system operation, automotive brake simulation system design teaching.
Abstract: To solve the optimization problem of agricultural transport vehicles’ maintenance cycle, in the premise of periodic testing and diagnosing technical condition of vehicles, based on the Weibull distribution, and use renewal function H (t), the related mathematical model is established, which optimization objective is to make the costs required for vehicle detection, diagnosis and maintenance unit run time (or mileage) the lowest. By analyzing a large number of collected samples, we confirm the running fault of a certain type agricultural transport vehicles belonging to Weibull distribution, and find the optimal solution of built model. Vehicle running tests show that the results are accurate and reliable, can guide the vehicle transport operations.
Abstract: A type of four degrees of freedom parallel robot is designed, which can make the workbench achieve the translational motion of three directions and one rotational motion. The constituent part of the robot is given. And we analyze the design principle and process of its work space. Though the CATIA simulation software, the whole movement of the robot is dynamically presented, showing the features of the various body parts and verifying the feasibility of its practical movement.
Abstract: Modular design is an effective design concept and method that adapts to fierce market competition and versatile customer requirement. Solving the key questions in applying modular design method is the important research topic of modern CAD technology. This paper studies the evaluation question of module combination program, and puts forward the evaluation model for CNC machine tool product. Analytic hierarchy process is used as the evaluation algorithm of combination program. The actual evaluation is carried out to verify the model and algorithm.
Abstract: Dam break is a serious social disaster, which causes a great deal of damage to the society and environment. In this paper, a 3D turbulence model coupled with the Volume of Fluid (VOF) method for the dam-break flood propagating is established, the loss of life resulting from dam failure is calculated by the modified Graham method, a statistical method is used for the economic loss, the main factors for social and environmental impacts are introduced, and finally the linear weighting method is carried out for comprehensive evaluation and analysis of dam-break consequences. The dam-break consequences of Dongwushi reservoir in Handan is taken as a case, the life loss, the economic loss, as well as social and environmental impacts are analyzed, and then a comprehensive evaluation of the dam-break consequences carried out.
Abstract: Systems as diverse as genetic networks or the World Wide Web are best described as networks with complex topology. A common property of many large networks is that the vertex connectivities follow a power-law distribution. This feature was found to be a consequence of three generic mechanisms: (i) networks expand continuously by the addition of new vertices, (ii) new vertex with priority selected different edges of weighted selected that connected to different vertices in the system, and (iii) by the fitness probability that a new vertices attach preferentially to sites that are already well connected. A model based on these ingredients reproduces the observed stationary scale-free distributions, which indicates that the development of large networks is governed by robust self-organizing phenomena. Experiment results show that the model is more close to the actual Internet network.
Abstract: For the problem of image quality degradation of cone-beam Computed Tomography (CBCT) based on flat panel detector (FPD), a constrained least squares iteration (CLSI) restoration method based on pre-filtering is proposed. Firstly, the original projected images are denoised with bilateral filtering algorithm. Then, the denoised projected images are restored with CLSI. Finally, the final restored images are obtained by adding the noise images, which got by subtracting the projected images before and after denoising, to the restored images. The experimental results show that the method well inhibits the noise amplification phenomenon in image restoration, and increases the edge sharpness and contrast-to-noise ratio (CNR) of the projected images and slice images. The CBCT image quality is significantly improved with this method.
Abstract: A generalized assignment problem under the special constraints is proposed, which can be solved by the ant colony algorithm (ACA). But the ACA for the problem is easy to fall in local optima because the constraints are relatively complicated. In this paper, the diversity in the results is maintained and the convergent speed is elevated by an adaptive method of updating pheromone and a mutation strategy for clearing up invalid assignment. The computer experiments demonstrate that the optimization performance is improved by the proposed algorithm, which is more suitable for the real-time application.