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Automatic classification of SMD packages using neural network

Journal of Institute of control, robotics and Systems 2015年第3期21卷 276-282页

作者： Youn, Seung Geun Lee, Youn Ae Park, Tae Hyung Dept. of Control and Robot Engineering Chungbuk National University Korea Republic of

This paper proposes a SMD (surface mounting device) classification method for the PCB assembly inspection machines. The package types of SMD components should be classified to create the job program of the inspection machine. In order to reduce the creation time of job program, we developed the automatic classification algorithm for the SMD packages. We identified the chip-type packages by color and edge distribution of the images. The input images are transformed into the HSI color model, and the binarized histroms are extracted for H and S spaces. Also the edges are extracted from the binarized image, and quantized histograms are obtained for horizontal and vertical direction. The neural network is then applied to classify the package types from the histogram inputs. The experimental results are presented to verify the usefulness of the proposed method. © ICROS 2015.

关键词： Image classification

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Visual touch recognition for NUI using Voronoi-tessellation algorithm

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Transactions of the Korean Institute of Electrical Engineers 2015年第3期64卷 465-472页

作者： Kim, Sung Kwan Joo, Young Hoon Dept. of Control and Robotics Engineering Kunsan National University Korea Republic of Dept. of Control and Robot Engineering Kunsan National University Korea Republic of

This paper presents a visual touch recognition for NUKNatural User Interface) using Voronoi-tessellation algorithm. The proposed algorithms are three parts as follows: hand region extraction, hand feature point extraction, visual-touch recognition. To improve the robustness of hand region extraction, we propose RGB/HSI color model, Canny edge detection algorithm, and use of spatial frequency information. In addition, to improve the accuracy of the recognition of hand feature point extraction, we propose the use of Douglas Peucker algorithm, Also, to recognize the visual touch, we propose the use of the Voronoi-tessellation algorithm. Finally, we demonstrate the feasibility and applicability of the proposed algorithms through some experiments. Copyright © The Korean Institute of Electrical Engineers.

关键词： User interfaces

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control design and frequency analysis of an output filter in parallel interleaved converters

Control design and frequency analysis of an output filter in...

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National Proceedings Power and Energy Conference (PECon)

作者： J. L. Da Silva G. L. Dos Reis S. I. Seleme T. A. Meynard University of Toulouse Laboratory on Plasma and Conversion of Energy Toulouse France Federal University of Itajubá — Unifei Laboratory of Conversion and Control of Electric Energy Itabira MG Brazil Dept. of Electronic Engineering Federal University of Minas Gerais — UFMG MG Brazil

ISBN: (纸本)9781509025480

An important characteristic in multicell parallel voltage source converters (VSCs), besides the enhancing of the current capacity, is the possibility of decreasing the energy storage in the output filter by interleaving the pulses sent to the semiconductors. As consequences, the filter components are smaller, losses are reduced and the electrical dynamics is enhanced, i.e. the filter presents higher bandwidth. Despite the higher speed as the number of cells increases, the filter's closed loop dynamics cannot follow continuously this improvement once the sampling/switching frequency limits the controller actuation. This paper presents a review about VSC output LCL filters and describes a methodology for the current controller design followed by an analysis in the frequency domain of the system's overall dynamics as the number of cells increases.

关键词： Power harmonic filters Inductors Resonant frequency Power conversion Active filters Switching frequency

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Application of hyperspectral remote sensing technique in monitoring pine wood nomatode disease

Application of hyperspectral remote sensing technique in mon...

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International Symposium on Optoelectronic Technology and Application 2016(OTA 2016)——Conf.9 Hyperspectral Remote Sensing Applications

作者： Lin Qin Jing Jiang Xianchang Yang Daiyan Ke Hongqun Li Xianghong Wang Dingyi Wang The Research Center for ecological environment monitoring and disaster control of the Three Gorges Reservoir Yangtze Normal University The School of electronic and Information Engineering Yangtze Normal University College of science Xian Jiaotong University Physics Dept. Univ.of New Brunswick

The pine wilt disease is a devastating disease of pine trees, native to North America. In china, the first discoveries of the pine wilt disease on 1982 at Dr. Sun Yat-sen’s Mausoleum in Nanjing. It oc

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Design of knee-pelvis joint in the biped robot for shock reduction and gravity compensation

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Transactions of the Korean Institute of Electrical Engineers 2015年第1期64卷 136-142页

作者： Kim, Young-Min Kim, Yong-Tae Dept. of Electrical Electronic and Control Engineering Hankyong National Univerity Korea Republic of

In the paper, a design method of knee and pelvis joint in the biped robot is proposed for shock absorption and gravity compensation. Similarly to the human's body, the knee joints-of the biped robot support most body weight and get a shock from the landing motion of the foot on the floor. The torque of joint motor is also increased sharply to keep the balance of the robot. Knee and pelvis joints with the spring are designed to compensate the gravity force and reduce the contact shock of the robot. To verify the efficiency of the proposed design method, we develope a biped robot with the joint mechanism using springs. At first, we experiment with the developed robot on the static motions such as the bent-knee posture both without load and with load on the flat ground, and the balance posture on the incline plane. The current of knee joint is measured to analyze the impact force and energy consumption of the joint motors. Also, we observe the motor current of knee and pelvis joints for the walking motion of the biped robot. The current responses of joint motors show that the proposed method has an effect on shock reduction and gravity compensation, and improve the energy efficiency of walking motions for the biped robot. Copyright © The Korean Institute of Electrical Engineers.

关键词： Energy utilization

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International Conference on Computational Intelligence and Communication Networks

作者： Miaojie Sang Zhonghua Sun Kebin Jia Dept. of Electronic Information and Control Engineering Beijing University of Technology

ISBN: (纸本)9781509000777

With the popularity of Internet video, video retrieval applications become more and more widespread. The effect of the traditional retrieval optimization algorithms cannot meet the needs of users. To improve rearrangement semantic rationality of video search results, this paper introduces the video annotation to mark based on the video content objectively. At the same time, the use of words semantic knowledge tree is important. Use the video annotation text and search terms in order to quantify the performance of the similarity. And combine video title and related text information to get the final video reranking sequence. In this paper, the validity was validated by experimental method, this paper also add video test on network video. Experimental results show that the performance of the method of reranking is improved.

关键词： Semantic similarity Visual reranking Content based rerangking Video annotation Content based video search

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Studies on the long-distance ignition circuit for HID lamps

Studies on the long-distance ignition circuit for HID lamps

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International Conference on Power electronics (ICPE)

作者： Woo-Cheol Lee Tae-Hun Kim Dept. of Electrical Electronic and Control Engineering Hankyong National University Korea

ISBN: (纸本)9781479988006

The electronic ballast for high-intensity discharge (HID) lamps needs a high-ignition voltage produced by a high voltage pulse igniter. However, in the case of a street lamp, the distance from the lamp to the ballast makes it difficult for a conventional pulsed high-voltage igniter to turn on the HID lamps because the ignition voltage is reduced. Therefore, research must be carried out on a resonant ignition to turn on the HID lamps. In this paper, topology and an algorithm for a resonant ignition are compared and verified. First, when a transformer is used in a resonant ignition, the method for reducing the load of the igniter is compared and proposed. Second, the parasitic capacitance, which affects the resonant frequency, is increased depending the length of the cable. The ignition voltage can be increased drastically under the resonant ignition through a frequency sweep. A method for reducing the voltage of the igniter is proposed and analyzed.

关键词： Clamps Ignition High intensity discharge lamps Resonant frequency Capacitors Coils RLC circuits

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An Efficient Method of Shadow Elimination Based on Image Region Information in HSV Color Space

An Efficient Method of Shadow Elimination Based on Image Reg...

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International Conference on Computational Intelligence and Communication Networks (CICN)

作者： Xiangyu Wang Kebin Jia Zhonghua Sun Dept. of Electronic Information and Control Engineering Beijing University of Technology Beijing China

In recent years, people have paid more attention to the shadow detection of moving target in video surveillance system. The shadow will directly affect the accuracy of moving target recognition, and do adverse effects on the subsequent processing such as target segmentation, target extraction and target tracking. So shadow elimination is an important part of intelligent video surveillance system. The paper proposes an efficient method of shadow elimination based on HSV color space and image region information. The proposed method uses the shadow elimination algorithm based on HSV color space to obtain the shadow regions to be dealt with. Then combining with the image region information, it judges whether the four boundary points of the moving target are shadow points. Eliminate the connected regions which shadow points exist from outer to inner along the shadow direction. It can avoid the regions whose color features are close to shadow inside the target object to be mistakenly eliminated. The experimental results show that the proposed method significantly improves the quality of shadow elimination.

关键词： Computational intelligence Communication networks

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Evidence Theory Based Self-Interference Suppression for Two-Way Full-Duplex MIMO Relays

Evidence Theory Based Self-Interference Suppression for Two-...

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International Conference on Computer and Information Technology (CIT)

作者： Yi Yang Yanhua Sun Enchang Sun Yanhua Zhang Dept. of Electronic Information and Control Engineering Beijing University of Technology Beijing China

In this paper, a novel self-interference (SI) suppression scheme based on Dempster-Shafer (D-S) evidence theory is proposed to cancel self-interference in two-way full-duplex (FD) MIMO relay. D-S evidence theory can appropriately characterize uncertainty and make full use of multiple evidence source information by Dempster's combination rule to obtain reliable decisions. Instead of traditional spatial-domain suppression schemes, the proposed DS-Sum and Difference(SAD)-PNC scheme adopts D-S evidence theory to detect the sum and difference signal for two source nodes considering the SI cancellation in obtaining basic probability assignment (BPA) function in the multiple access (MA) phase. For comparison, Log-Likelihood-Ratio (LLR) combining technique is extended for FD mode with SI suppression considered in soft information computation for network-coded symbol. In the broadcast (BC) phase, antenna selection scheme is adopted to achieve full transmit diversity gain. Simulation results reveal that the proposed DS-SAD-PNC scheme obtains better end-to-end average bit error rate (BER) performance compared with extended MIMO-LLR-PNC and traditional spatial-domain suppression schemes like ZF and MMSE with a little complexity increased.

关键词： Relays Interference cancellation MIMO Bit error rate Receiving antennas High definition video Uncertainty

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Facial Expression Recognition under Partial Occlusion Based on Gabor Filter and Gray-Level Cooccurrence Matrix

Facial Expression Recognition under Partial Occlusion Based ...

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International Conference on Computational Intelligence and Communication Networks (CICN)

作者： Rui Li Pengyu Liu Kebin Jia Qiang Wu Dept. of Electronic Information and Control Engineering Beijing University of Technology Beijing China

ISBN: (纸本)9781509000777

This paper presents a novel facial expression recognition approach in the presence of partial occlusion using Gabor filters and gray-level co-occurrence matrix (GLCM). At first, we design an algorithm to extract the block Gabor feature statistics according to the spatial distribution of the face organ. Then, GLCM is firstly introduced into expression recognition field to make up for the deficiency of block Gabor feature, in which the association between pixels is absent. Finally, the block Gabor feature statistics is linear superimposed with the texture feature extracted by GLCM, after Gaussian normalization there generates a set of low-dimensional feature vectors for expression feature representation. The experimental results on JAFFE and RaFD show the high robustness and better recognition rates of the proposed novel approach under different types of occlusion.

关键词： Feature extraction Face recognition Gabor filters Face Databases Robustness

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