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You W.Z.,Shanghai Publishing and Printing College
Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015 | Year: 2015

With the rapid development of Internet, information explosively grows at a geometric rate. How to retrieve useful information from the vast amounts of multimedia information resources is a hot research topic. A multi-feature-based image retrieval system on the condition of extracted multi-feature has been carried out. PCA method was used for dimensionality reduction. Relevance feedback technique is used to get the connection of system and users, and adjust the values of the features according to the feedback of users, to raise the accuracy of image retrieval and satisfy the users' need. The experiment shows that the proposed algorithm has better retrieval performance. © 2015 IEEE. Source


Hu Y.,Shanghai Publishing and Printing College
Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015 | Year: 2015

Mechanical parts defect detection is an important problem in machinery manufacturing. Therefore, in this paper, we propose a novel mechanical parts defect detection method based on computer vision technology. Firstly, structure of the proposed mechanical parts defect detection system is described, which is made up of five modules: 1) Image collecting, 2) Image processing, 3) Image analyzing, 4) Image understanding, 5) Industrial control. Secondly, the SVM based mechanical parts defect detection, in which the parameters are optimized by the quantum behaved particle swarm optimization algorithm. Thirdly, to testify the effectiveness of the proposed algorithm, the MV-1300UM industrial digital camera is used to collect mechanical part images, and experimental results demonstrate that the proposed method can achieve high recognition rate. © 2015 IEEE. Source


Peng X.,Shanghai Publishing and Printing College
Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015 | Year: 2015

In this paper, we focus on the problem of massive data retrieval, which is of great importance in data management and searching. To enhance the effectiveness of massive data retrieval, we introduce the Top-k query technology in this work. Top-k denotes to the method which only returns the top K most important objects according to a given ranking function. To tackle the limitations of the existing Top-k query, we proposed a modified Top-k query algorithm. In this algorithm, we select the data elements which have higher ranking scores on each attribute, and then run a threshold controlling scheme on these data elements. Finally, to make performance evaluation, we collect a dataset from US census dataset. Experimental results demonstrate that compared with PDG method, our algorithm can achieve better performance both in retrieval effectiveness and retrieval accuracy. © 2015 IEEE. Source


The synthesis procedure and dopant are crucial to the electrical conductivity, thermal stability, and solubility properties of polyaniline (PANI). In this paper, high-performance PANI was synthesized by means of chemical oxidative polymerization using anionic spherical polyelectrolyte brushes (ASPB) as dopant. The bonding structure, crystallographic structure, morphology, and thermal stability of the conductive nanocomposite were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermo-gravimetric analysis (TGA) respectively. Meanwhile, investigation on the electrical conductivity suggested that the room-temperature electrical conductivity of PANI doped with ASPB (PANI/ASPB) was 19.3 S/cm, which was higher than that of PANI (7.0 S/cm), PANI doped with poly(sodium-p-styrenesulfonate) (PSS) (PANI/PSS) (14.6 S/cm), PANI doped with SiO2 (PANI/SiO2) (18.2S/cm), and PANI doped with canonic spherical polyelectrolyte brushes (CSPB) (PANI/CSPB) (8.0 S/cm). Meanwhile, the addition of ASPB improved the thermal stability and solubility properties of PANI. ASPB played the role of template. Conductive mechanism of PANI/ASPB nanocomposite can be explained by the theoretical models of three-dimensional variable range-hopping (3D VRH). © 2015 by the author; licensee MDPI, Basel, Switzerland. Source


Dai Z.,Shanghai Publishing and Printing College
Shanghai Ligong Daxue Xuebao/Journal of University of Shanghai for Science and Technology | Year: 2015

The convergence side is a standard to distinguish 2D images from 3D images and is a key element for the viewing comfort of 3D images. Analyzing the relationship between the convergence side and viewing comfort makes the foundation of the study. The influence of convergence side on viewing comfort was analyzed from the aspects of convergence side camera parameters, visual language expression in image creation and viewing condition of 3D images. The relevance between convergence side and perception depth, parallax distance, objective lens spacing etc. was obtained. On these bases, the rules and methods for adjusting convergence side parameters in the processes of shooting, non-linear editing and showing were summed up. Through experiments, the valid data range for convergence side parameters adjustment was obtained. The results provide necessary basis for creating 3D video works with viewing comfort. ©, 2015, Shanghai Institute of Mechanical Engineering. All right reserved. Source

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