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14th Conference on Computational Linguistics and Speech Processing, ROCLING 2001

作者： Mei, Xiao-Dan Sun, Sheng-He Pan, Jeng-Shyang Chen, Tsong-Yi Dept. of Automatic Test Measurement and Control Harbin Institute of Technology China Dept. of Electronic Engineering National Kaohsiung University of Applied Sciences Taiwan

In this paper, the tabu search algorithm is employed to train Hidden Markov Model (HMM) to search out the optimal parameter structure of HMM for automatic speech recognition. The proposed TS-HMM training provided a mechanism that allows the searching process to escape from the local optimum and obtain a near global optimum. Experimental results show that the TS-HMM training has a higher probability to find the optimal model parameters than the traditional algorithms. © 2001 Proceedings of the 14th Conference on Computational Linguistics and Speech Processing, ROCLING 2001. All rights reserved.

关键词： Global optimum Hidden Markov Model Speech recognition Tabu search

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An efficient BTC image compression algorithm with visual patterns

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Journal of Harbin Institute of Technology(New Series) 2000年第3期7卷 62-65页

作者：陆哲明潘正祥孙圣和 LU Zhe-ming (Dept. of Automatic Test and Control Harbin Institute of Technology Harbin 150001 China) SUN Sheng-he (Dept. of Electronic Engineering Kaohsiung Institute of Technology Taiwan)

Discusses block truncation coding (BTC) a simple and fast image compression technique suitable for real time image transmission with high channel error resisting capability and good reconstructed image quality, and its main drawback of high bit rate of 2 bits/pixel for a 256 gray image for the purpose of reducing the bit rate, and introduces a simple look up table method for coding the higher mean and the lower mean of a block, and a set of 24 visual patterns used to encode 4×4 bit plane of the high detail block and proposes a new algorithm, when needs only 19 bits to encode 4×4 high detail block and 12 bits to encode the 4×4 low detail block.

关键词： Block truncation coding visual patterns image compression

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Realization of High-Speed and Big-Capability Data Recorder

Realization of High-Speed and Big-Capability Data Recorder

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2013 IEEE 11th International Conference on Electronic Measurement & Instruments

作者： Deng Libao Zhao Haoran Yang Yi Dept. of Automatic Test and Control Harbin Institute of Technology School of Information Science and Engineering Harbin Institute of Technology at Weihai The Second Artillery Representation Office in Harbin

ISBN: (纸本)9781479907571

Data-recording device for aircraft requires high-speed, high-capacity and non-volatile storage. In the paper, we provide a good solution for high-speed large-capacity data logger. We use FPGA as controller, SDRAM as high-speed data buffer, CF card as a non-volatile data memory and USB2.0 as Communication interface to design a dual-channel data logger. The test results show that the recorder sampling rate is 120MSa/s, single-channel data store rate is 38MB/s, the total capacity is 64GB, and data upload rate is up to 30MB/s. Therefore it meets the expectations.

关键词： FPGA, CF card, SDRAM, USB2.0

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Digital Image Watermarking Method Based on Vector Quantization with Labeled Codewords

Digital Image Watermarking Method Based on Vector Quantizati...

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作者： Lu, Zhe-Ming Xing, Wen Xu, Dian-Guo Sun, Sheng-He Dept. of Automatic Test and Control Harbin Institute of Technology Harbin 150001 China Department of Electrical Engineering Harbin Institute of Technology Harbin China

This Letter presents a novel VQ-based digital image watermarking method. By modifying the conventional GLA algorithm, a codeword-labeled codebook is first generated. Each input image block is then reconstructed by the nearest codeword whose label is equal to the watermark bit. The watermark extraction can be performed blindly. Simulation results show that the proposed method is robust to JPEG compression, vector quantization (VQ) compression and some spatial-domain processing operations.

关键词： Digital watermarking

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An efficient distributed navigation algorithm for mobile robot

An efficient distributed navigation algorithm for mobile rob...

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7th International Symposium on Instrumentation and control Technology: Measurement Theory and Systems and Aeronautical Equipment

作者： Yang, Xiuping Liu, Songyan Liu, Zhen School of Electronic Engineering Heilongjiang University 150080 Harbin China Dept. of Automatic Test and Control Harbin Institute of Technology 150001 Harbin China

ISBN: (纸本)9780819473622

An efficient distributed algorithm for mobile nodes of wireless sensor network (WSN) is proposed. A smart mobile robot is designed as the special node of WSN, and the nodes of WSN are deployed in the environment as signposts for the robot to follow. We use the RSSI value between the robot and other static nodes as the input of the navigation control system. The mobile robot state and navigation space are denoted by the RSSI potential field. Navigation directions are computed by using fuzzy logic method. To reduce the communication expense, each node within one hop communication range of robot is a distributed navigation unites. Then the fuzzy logic control centre will collect the control outputs from every beacon nodes and calculate the final outputs for mobile robot based on data fusion. The experimental results confirm that the navigation system based on WSN successfully achieved their assigned tasks.

关键词： Mobile robots

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The Quasi-Distributed Strain Monitoring System Based on Optical Fiber Grating in Large Structure

The Quasi-Distributed Strain Monitoring System Based on Opti...

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作者： Yang, Xianhui Zhang, Qiuhua Sun, Sheng-He Dept. Automatic Test and Control Harbin Institute of Technology Harbin 150001 China Dept. of Astronautic Engineering Harbin Institute of Technology Harbin 150001 China

The quasi-distributed strain monitoring system based on optical fiber grating in large structure was presented. The dual sensitivity problem to temperature and strain was solved using the system. The method enables to... 详细信息

关键词： Fiber Bragg gratings

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Attitude estimation algorithms using low cost IMU

International Journal of Control and Automation

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International Journal of control and Automation 2015年第11期8卷 113-126页

作者： Quoc, Dung Duong Sun, Jinwei Le, Van Nhu Dept. of Automatic test and control Harbin Institute of Technology Harbin China Research center for Space Optics Engineering Harbin Institute of Technology China Le Qui Don Technical University Cau Giay Ha Noi Viet Nam

Attitude estimation has a wide range of applications including aerial (UAVs for example), underwater (ROVs for instance), navigation systems, robotics, games, augmented reality system, industrial and so on. Extensive research over decades in this field resulted in a number of powerful estimators;complex like Kalman based algorithms as well as simple such as complementary filters & the kinds. For applications where computational simplicity is of prime concern, complementary filters have proven efficiency. This paper presents a comparative study of computationally simple algorithms naming Explicit Complementary Filter (ECF) and Gradient Descent based Complementary Filter (GDCF) along with computationally demanding extended Kalman filter-a de-facto standard for attitude estimation so far, regarding attitude estimation based on MEMS IMU. An alternative would be the variants of complementary filter;sufficiently efficient and simple scheme to avoid computational *** of these estimators is evaluated for Euler angle estimation using both simulated data from Matlab and experimental data from MPU6050 IMU. The assessment is based on the root mean square error computation for these algorithms. Moreover, the algorithms adjustable parameters were exploited for a range of values in the hunt for perfection. © 2015 SERSC.

关键词： Data fusion

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Digital watermarking for volume data based on 3D-DWT and 3D-DCT 09

Digital watermarking for volume data based on 3D-DWT and 3D-...

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2nd International Conference on Interaction Sciences: Information Technology, Culture and Human, ICIS 2009

作者： Liu, Wang Zhao, Chunhui Information and Communication Engineering College Harbin Engineering University Harbin Heilongjiang 150001 China Dept. of Automatic Test and Control Harbin Institute of Technology Harbin Heilongjiang 150001 China

ISBN: (纸本)9781605587103

With the rapid development of computer multimedia, how to protect digital products from being copied, pirated and juggled has been an urgent issue in the information security field. Digital watermarking is a new method to solve the referred problems. This paper proposes a gray-level digital watermarking algorithm for volume data based on three-dimension discrete wavelet transform (3D-DWT), three-dimension discrete cosine transform (3D-DCT) and spread-spectrum communication techniques. The embedded watermark is not only invisible but also resistant to the common attacks such as cropping, adding noise, and filtering. The validity of proposed algorithm has been confirmed with experiments. Copyright © 2009 ACM.

关键词： Discrete cosine transforms

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A reconstruction algorithm with iterative reconstruction-reprojection and an FIR filter

A reconstruction algorithm with iterative reconstruction-rep...

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Information Optics and Photonics Technology

作者： Wan, Xiong He, Xingdao Zou, Wendong Chen, Xuegang Cai, Minggang Dept. of Test and Control Engineering Nanchang Institute of Aeronautical Technology Nanchang 330034 China Institute of Automation of Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

Some approaches, which include iterative reconstruction-reprojection (IRR), projection space iteration reconstruction-reprojection (PSIRR) and other interpolation methods, have already been proposed for the reconstruction of fields including opaque objects. In the IRR, the interpolation operation is performed in the object space during backprojection-reprojection. The errors associated with the interpolation degrade the reconstructed image and may cause divergence unless a large number of rays and views are adopted. In the research of optical test, the testing views are often limited;therefore, the results are usually poor when using the IRR to reconstruct the fields including opaque objects. To improve the reconstruction precision in this case, a new approach is proposed, which is based on the discrete IRR algorithm and the finite impulse response (FIR) lowpass filer (DIRRLF). This filer is used to process the reprojection data between the iterative reconstruction and the reprojection stages. Different window functions and bandwidths are adopted for the lowpass filter. The compared reconstruction results of discrete IRR algorithm and DIRRLF algorithm for an asymmetrical single-peak simulation field including a circle round opaque object are studied with the numerical simulation of computer. The results show that this algorithm has higher reconstruction precision than the discrete IRR algorithm and has a potential application of reconstructing real three-dimensional fields including opaque objects.

关键词： Algorithms

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A Tree-structured Codebook Partitioning Technique for VQ-based Image Watermarking

A Tree-structured Codebook Partitioning Technique for VQ-bas...

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作者： Bao, Yong Lu, Zhe-Ming Xu, Dian-Guo Dept. of Automatic Test and Control Harbin Institute of Technology Harbin China Department of Electrical Engineering Harbin Institute of Technology Harbin China

We propose a pairwise codebook partitioning technique for robust watermarking based on vector quantization. We group codewords in pairs by similarity. One is labeled '0' and the other labeled '1'. For each image block, we first find the pair that owns the nearest codeword. The watermark is then embedded by selecting from the pair the codeword whose label equals the corresponding watermark bit. The extraction process can be performed blindly. Simulation results show that the proposed method can survive JPEG compression, high-quality VQ compression and some common signal processing operations.

关键词： Digital watermarking

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