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International Conference on intelligent Control and Information Processing (ICICIP)

作者： Wanbo Yu Chunjian Chi Xiaopeng Wei Xuesong Yang Laboratory of Advanced Design and Intelligent Computing Ministry of Education Dalian University Dalian Liaoning China Dalian University Dalian CN

In order to protect image effectively, presented an image encryption algorithm based on wavelet function and four-dimension chaotic system. The algorithm firstly uses Wavelet function chaotic maps to scramble the image pixel location, and then use four-dimension chaotic system disturbs image pixel value. Experimental results show that the algorithm has a good properties that Shannon proposes confusion and diffusion. At the same time, It can resist a strong attack with the large key space, encryption image pixel values has a random uniform distribution and adjacent pixels value has zero correlation. These results show that the proposed scheme has good security characteristics.

关键词： Encryption Pixel Chaos Correlation Algorithm design and analysis Signal processing algorithms

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design of active control law for aeroelastic system based on proper orthogonal decomposition reduced order model

Design of active control law for aeroelastic system based on...

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作者： Gang, Chen Li, Yueming Hu, Patrick MOE Key Laboratory for Strength and Vibration College of Aerospace Xi'an Jiaotong University Xi'an 710049 China Advanced Dynamics Inc. Lexington KY 40511 China Department of Aerospace Engineering Department of Science Computing and Structure Design

ISBN: (纸本)9781600867422

Currently the highest accurate method for complex aeroelastic system is CFD/CSD coupled numerical simulation. But it is also the least efficient method .So it can't be directly used to design the active control law for aeroelastic system. In order to solve the problem, A reduced order model (ROM) based on time-domain proper orthogonal decomposition (POD) was investigated in this paper. Because the order of time-domain POD/ROM is much higher than frequency-domain POD/ROM, the POD-BT/ROM was developed by introducing the balanced truncation method in control theory. And then the lower order aeroservoelastic model based on POD-BT/ROM was build. The detail of the construction of time-domain POD/ROM and the design of active control law was demonstrated by AGARD 445.6 wing. The numerical results show that the POD/ROM nearly has the same accuracy as the CFD/CSD coupled method and improves the computation efficiency about 1-2 order of magnitude. It's a high efficient and accurate active control law design tool for aeroelastic system.

关键词： Control theory

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An Image Encryption Algorithm Based on DNA Self-Assembly Technology

An Image Encryption Algorithm Based on DNA Self-Assembly Tec...

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2010 IEEE International Conference on intelligent computing and intelligent Systems(2010 IEEE 智能计算与智能系统国际会议 ICIS 2010)

作者： Shihua Zhou Qiang Zhang Xiaopeng Wei School of Mechanical Engineering Dalian University of Technology Dalian P.R.China Key Laboratory of Key Laboratory of Advanced Design and Intelligent Computing (Dalian University)Ministry of Education School of Mechanical Engineering Dalian University of Technology Dalian P.R.China Key Laboratory of

DNA self-assembly that is fast developed in the fields of DNA computing and nano technology has become the focus of scientific fields. DNA self-assembly is a method that uses the characteristics of base-pair to form polyhedron or super molecular structure. This is a complex progress from disordered to ***, from simple to complicated. This paper mainly introduces that the DNA self-assembly technology is applied into the image encryption. In this paper, we proposed a complete design scheme of DNA tiles that is suitable for the image encryption. The DNA tiles mainly include five types, namely DNA tiles of the plaintext, DNA tiles of the encryption, DNA tiles of the cipertext, DNA tiles of the key and DNA tiles of the decryption. Through a simulate example, the effect of the image encryption algorithm is shown.

关键词： image encryption DNA serf-assembly technology DNA tiles

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3D mesh segmentation based on boundary strength

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Ruan Jian Xue Bao/Journal of Software 2010年第SUPPL. 1期21卷 183-193页

作者： Sun, Xiao-Peng Ji, Yan-Jie Wei, Xiao-Peng Department of Computer and Information Technology Liaoning Normal University Dalian 116029 China School of Mechanical and Engineering Dalian University of Technology Dalian 116024 China Key Laboratory of Advanced Design and Intelligent Computing Dalian University Dalian 116622 China

In this paper, we present a novel and fast algorithm for 3D meshes segmentation based on the geometric information of boundary. Firstly, according to the topological relationship of original mesh faces, we construct the dual graph, and set the weight of vertex and edge on the basis of geometric information of mesh faces. Using the k-way multilevel cutting method, we segment the dual graph quickly to obtain the pre-segmentation and initial boundary for each patch. Then we define the boundary strength function and the feature boundary of each patch, to construct a deformation contour on the patch's boundary. By minimizing the energy of the deformation contour, the initial boundary is driven to approach the feature boundary. Finally, the original mesh is segmented into several meaningful patches in accordance with the minimal rule. The experiment results suggest that our algorithm is efficient and effective, and is applicable to a variety of triangular mesh models with prominent shape features. © by Institute of Software, the Chinese Academy of Sciences.

关键词： Deformation

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The distributed maximum power point tracking method and application in the PV grid-connected generation

The distributed maximum power point tracking method and appl...

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International Conference on intelligent System design and Engineering Application (ISDEA)

作者： Zhao, Tingting Ju, Zhenhe Wang, Hongjiang Wei, Xiaopeng Li, Xiaoxiao Shi, Zhang School of Management Dalian University of Technology Dalian China New Energy Center Shenyang Institute of Engineering Shenyang China Department of Information and Engineering Shenyang Institute of Engineering Shenyang China Key Laboratory of Advanced Design and Intelligent Computing Ministry of Education Dalian University Dalian China Department of Study Liaoning Solar Energy R and D Co. Ltd. Shenyang China Institute of Systems Engineering Northeastern University Shenyang China

ISBN: (纸本)9780769542126

In the system of the PV grid-connected generation, because of the dispersion of the PV panel, difference of the sun radiation condition and the shadow of a part of the PV panel, they will cause the serious loss of energy for the parallel PV panel. In order to overcoming energy loss and raise the efficiency of the PV system, a new maximum power point tracking method called distributed variable step duty ratio perturb method is put forward. The distributed MPPT method overcomes the shortcomings to generate electricity quantity to descend because of the dispersion of the PV panel. The variable step duty ratio perturbing method speed quickly and is more suitable for this kind of distributed generation system. The hardware adopts DC/DC electric circuit to regulate PWM duty ratio. The software adopts TMS320-2812. An example is given to show that this method is able to realize distributed MPPT. In addition, the calculation speed of the approach is quick, accuracy of the approach is better, and the system has a high stability. © 2010 IEEE.

关键词： Maximum power point trackers

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Creative design of solar energy portable lamp based on product gene and intuition models

Creative design of solar energy portable lamp based on produ...

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IEEE International Conference on Industrial Engineering and Engineering Management

作者： Ting-ting Zhao Zhen-he Ju Xiao-peng Wei Xiao-xiao Li Department of Information Engineering Shenyang Institute of Engineering Shenyang China Key Laboratory of Advanced Design and Intelligent Computing Ministry of education Dalian University of Technology Dalian China Liaoning Solar Energy Research and Development Company Limited Shenyang China

Intuition process is a very essential in the product creative design stage. A new creative design approach is put forward based on product gene and intuition models. The product gene model and its sequential gene manipulation are established. The intuition process reflects that the thinking of human brain produces qualitative change. An approach of intuition simulation is used by Hebb learning law, Hopfield neural networks and crossover and mutation. The calculating models and the calculating formulas for the creative design are put forward. Finally, this essay offers us the applied examples for creative design of solar energy portable lamp. The better results are obtained in the creative design.

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Multi-objective optimization conceptual design of solar energy product based on hybrid genetic algorithm

Multi-objective optimization conceptual design of solar ener...

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International Conference on Computer design and Applications (ICCDA)

作者： Tingting Zhao Zhenhe Ju Xiaopeng Wei Shi Zhang Shuaijie Wang Xiaoxiao Li School of Management Dalian University of Technology Dalian China Key Laboratory of Advanced Design and Intelligent Computing Ministry of Education Dalian University Dalian China New Energy Center Shenyang Institute of Engineering Shenyang China Institute of Systems Engineering College of Information Science and Engineering Northeastern University Shenyang China Department of study Liaoning Solar Energy R and D Company Limited Shenyang China

ISBN: (纸本)9781424471645;9781424471638

For research on conceptual design of the complex product, it is necessary that a reliable theory is found to decide if the design structure is suit for custom requirement. The correlation matrixes among requirements, functions and structures are proposed. A block diagonal matrix of correlation matrix between functions and structures is given. The mathematical models of multi-object optimization structure design are provided, and then calculated by the hybrid genetic algorithm. An example for solar energy automobile is given to show that this method is able to realize optimization structure design fitting for the requirements. In addition, the approaches can provide good Pareto optimization solutions.

关键词： design optimization Algorithm design and analysis Solar energy Genetic algorithms Genetic engineering design engineering Power engineering and energy Mathematics Pareto optimization Reliability engineering

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View-dependent fast real-time generating algorithm for large-scale terrain

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Procedia Earth and Planetary Science 2009年第1期1卷 1147-1151页

作者： Jin, Hai-liang Lu, Xiao-ping Liu, Hui-jie Key Laboratory of Mine Spatial Information Technologies State Bureau of Surveying and Mapping Henan Polytechnic University Jiaozuo 454000 China Key Laboratory of Advanced Design and Intelligent Computing Dalian University Dalian 116622 China

In order to eliminate the popping effect of switching among levels of detail and to increase the frame rates with high image quality during the fly-through of large-scale terrain, this paper put forward a new bottom-up modeling strategy, which constructed simplified terrain triangle mesh globally and updated mesh nodes dynamically. Employed hybrid culling technique based on blocks and triangle faces and simplified computing method for screen-space errors to select appropriate terrain nodes rapidly. Then updated the Delaunay terrain mesh by adding nodes, deleting nodes and modifying locally. At the same time achieved self-adaptive control for screen-space error tolerance during the terrain fly-through. Results of simulation experiments demonstrate that the algorithm eliminates popping effect effectively, and has a higher frame rate compared with other algorithms. So it is particularly suitable for close-distance fly-through simulation of large-scale terrain. © 2009.

关键词： Landforms Image quality Visualization Bottom up modeling computing methods Delaunay Error tolerance Frame rate High image quality Large scale terrain Levels of detail Mesh nodes Other algorithms Real time visualization Self adaptive control Simulation experiments Terrain meshes Triangle mesh View dependent

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Research on visualization techniques in data mining

Research on visualization techniques in data mining

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2009 International Conference on Computational Intelligence and Software Engineering, CiSE 2009

作者： Jin, Hailiang Liu, Huijie Key Laboratory of Mine Spatial Information Technologies of State Bureau of Surveying and Mapping Henan Polytechnic University Jiaozuo China Key Laboratory of Advanced Design and Intelligent Computing Dalian University Dalian China

ISBN: (纸本)9781424445073

Visual data mining can help in dealing with the flood of information. The advantage of visual data exploration is that the user is directly involved in the data mining process, through analysis the results of the information visualization, user can integrate the specialist knowledge with the data mining algorithm. This paper summarizes current visualization methods applied in data mining. Current applications about visual data mining technique are analyzed combining with some national advanced data mining tools. Trends are clarified based on the task and object of visual data mining. ©2009 IEEE.

关键词： Data mining

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Terrain visualization and application based on 3D GIS

Terrain visualization and application based on 3D GIS

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1st International Conference on Information Science and Engineering, ICISE2009

作者： Jin, Hailiang Liu, Huijie Key Laboratory of Mine Spatial Information Technologies State Bureau of Surveying and Mapping Henan Polytechnic University Jiaozuo China Key Laboratory of Advanced Design and Intelligent Computing Dalian University Dalian China

ISBN: (纸本)9780769538877

GIS has the function of powerful spatial data process and 3D visualization analysis. In this paper, by using available remote sensing image, DEM data for experiment, we realize 3D terrain visualization and terrain analysis, the technology of how to display huge volume of digital elevation model(DEM)data is introduced, and spatial analysis is studied based on the terrain created using DEM. In the end, the paper introduces the process of the implementation in brief. ©2009 IEEE.

关键词： Data visualization

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