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engineering and Telecommunication (EnT-MIPT)

作者： Dam Trong Nam Gennady Yu. Gryzov Alexander V. Dvorkovich Viktor P. Dvorkovich Multimedia Systems and Technology Lab. Moscow Institute of Physics and Technology Moscow Russian Federation MIPT-School of Radio Engineering and Computer Technology Moscow Institute of Physics and Technology Moscow Russian Federation Multimedia Technology and Telecommunication Dep. Moscow Institute of Physics and Technology Moscow Russian Federation

ISBN: (纸本)9781728104331

This paper is dedicated to the research and development of quantization methods for wavelet-based video codec. Uniform, nonlinear quantization method and their potential applications for wavelet-based video codec Dirac have been investigated. The optimized quantization method for wavelet-based video codec have been proposed based on analysis of the processing results for various video types using quantization methods mentioned above. The processing results for various types of video show that the proposed method provides up to 4.2% bitrate saving for low distortion level in the intra-frame coding mode, up to 9.8% bitrate reduction for low distortion level and up to 11.2% bitrate saving for medium (acceptable) distortion level in the inter-frame coding mode compared to the uniform quantization method implemented in video codec Dirac.

关键词： Quantization (signal) Video codecs Wavelet transforms Distortion Bit rate Image coding

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High-Performance Computing (HPC) design to improve the quality of Introduction of Parallel Computing lectures

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IOP Conference Series: Materials Science and engineering 2019年第1期462卷

作者： E Alfianto A Sa'diyah F Rusydi I Puspitasari Dep. of Computer System Institut Teknologi Adhi Tama Surabaya Jl Arif Rachman Hakim 100 Surabaya Indonesia. 60111 Dep. of Marine Engineering Politeknik Perkapalan Negeri Surabaya Jl Jalan Teknik Kimia Kampus ITS-Sukolilo Surabaya Indonesia 60117 Theoretical Physics Research Group Dep. of Physics Fac. of Science and Technology Airlangga University Jl. Mulyorejo Surabaya Indonesia 60115 Dep. of the information system Fac. of Science and Technology Airlangga University Jl. Mulyorejo Surabaya Indonesia 60115

High-Performance Computing (HPC) has been created to improve the quality of Pengantar Komputasi Parallel lectures. HPC consists of two PCs with AMD Ryzen 7 processor connected by high-speed LAN. HPC is used to solve problems that students can't practice Parallel Computing because the computer used is not adequate. So it takes a machine that can used together that has many processors, so the problems encountered are resolved. The results obtained, participants can use more than four processors to solve tree problems directly.

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Classification of Hand Movements from EMG Signals using Optimized MLP

Classification of Hand Movements from EMG Signals using Opti...

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International Joint Conference on Neural Networks (IJCNN)

作者： Aron A. Martins Lima Rafael M. Araujo Fábio A. Guidotti dos Santos Victor H. Yoshizumi Fábio K. H. de Barros Danilo H. Spatti Luisa H. B. Liboni Maria E. Dajer Department of Electrical Engineering Federal University of Technology Paraná Cornélio Procópio Brazil Department of Computational Systems University of São Paulo São Carlos Brazil Dep. of Electrical and Computer Engineering Federal Institute of Education Science and Technology of São Paulo Sertãozinho Brazil

The emergence of artificial neural networks (ANNs) caused a great revolution in the knowledge area of pattern-classification and contributed to the fast development of intelligent systems. For an ANN to be effective, its topology parameters must be set up, such as learning rate, number of layers, and number of neurons. Therefore, optimization algorithms can be used to produce more efficient ANNs. In this paper, we propose a genetic algorithm (GA) to better estimate parameters of an ANN applied to the classification of the type, strength, and orientation of different hand movements from electromyography signals. Acquired data signals were first processed with the Wavelet Transform (WT) to extract the most important features. These features were presented to the optimized hybrid intelligent system (HIS) composed of ANNs and the optimization GA. Classification results are promising, presenting accuracy rates above 90% and reliability rate of 98%. These results support the use of HIS in practical applications such as smart prostheses and automatic medical evaluations.

关键词： Electromyography Artificial neural networks Topology Genetic algorithms Wrist Transforms Network topology

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Wavelet-Based Video Coding: Modem Implementations and Prospects of Coding Efficiency Increase 4

Wavelet-Based Video Coding: Modem Implementations and Prospe...

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4th International Conference on engineering and Telecommunication, En and T 2017

作者： Bystrov, Kirill S. Gryzov, Gennady Yu. Dvorkovich, Alexander V. Dvorkovich, Viktor P. Multimedia Systems and Technology Lab. Moscow Institute of Physics and Technology Moscow Russia Fiztech-School of Radio Engineering and Computer Technology Moscow Institute of Physics and Technology Moscow Russia Multimedia Technology and Telecommunication Dep. Moscow Institute of Physics and Technology Moscow Russia

ISBN: (纸本)9781538645475

Discrete wavelet transform (DWT) have found a practical use in multiple applications of digital signal processing including image compression. Despite a set of advantages, DWT is still weakly used in modern video compression technique and systems. Here an observation of DWT usage prospects is presented for video coding in terms of multichannel wavelet video codec implementation. © 2017 IEEE.

关键词： Discrete wavelet transforms

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A new statistical detector for CT-based multiplicative image watermarking using the t location-scale distribution

A new statistical detector for CT-based multiplicative image...

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Conference on Information and Knowledge technology

作者： Sadegh Etemad Maryam Amirmazlaghani Dep. of Computer Engineering and Info. Technology Amirkabir University of Technology Tehran Iran

In this study, a new statistical multiplicative watermark detector in contourlet domain is presented. The contourlet coefficients of images are highly non-Gaussian and a proper distribution to model the statistics of the contourlet coefficients is a heavy-tail Probability Distribution Function (PDF). In this study, a multiplicative watermarking scheme is proposed in the contourlet domain using t location-scale distribution (tLS). Afterward, we used the likelihood ratio decision rule and tLS distribution to design an optimal multiplicative watermark detector. The detector showed higher efficiency than other watermarking schemes in the literature, based on the experimental results, and its robustness against different attacks was verified.

关键词： Watermarking Detectors Transforms Additives Airplanes Boats Copyright protection

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Electric energy production in a wind farm - the statistical analysis of measurement results using the time series

Electric energy production in a wind farm - the statistical ...

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Progress in Applied Electrical engineering (PAEE)

作者： Wiesława Malska Damian Mazur Dep. of Power Electronics Rzeszow University of Technology Rzeszow Poland Dep. of Electrical and Computer Engineering Fundamentals Rzeszow University of Technology Rzeszow Poland

The paper presents an analysis of the results of electric energy production in a wind farm. A statistical analysis of the measurement results were performed using the STATISTICA program. The article presents time series on the forecast of electric energy production and actually sold electric energy produced in a wind farm. The analysis was based on data coming from a real wind farm - located in Subcarpathion region.

关键词： Production Wind farms Time series analysis Wind forecasting Renewable energy sources Forecasting Power system stability

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A user's intention detection method for smart walker

A user's intention detection method for smart walker

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International Conference on Awareness Science and technology (iCAST)

作者： Wen-Chang Cheng Yan-Zhi Wu Dep. of Computer Science and Information Engineering Chaoyang University of Technology Taichung Taiwan

To assist home care for the elderly, we've finished a smart walker in previous study, with the features including destination track navigation, obstacle detection, self-positioning, follow-up, and wireless inductive charging. In this study, we further finish the user's intention detection function on the smart walker to control the smart walker. We install 3 pressure sensors on both sides of smart walker handles respectively to extract the user's force application, which are taken as input signal. Through AdaBoost classifier, it finishes input signal recognition and controls of the smart walker moving forward/backward directly. The user doesn't need to press the switch or click on the panel, but apply force on the handle directly, which makes the operation easier. The experiment validates that the accuracy can achieve higher than 98%, which can simplify the operation effectively and achieve the practical purpose.

关键词： Pressure sensors Training Error analysis Senior citizens Force Elevators

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Wavelet transform based technique for text image localization

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Karbala International Journal of Modern Science 2016年第2期2卷 138-144页

作者： Ali, Suhad A. Hashim, Ashwaq T. Babylon University Science College for Women Computer Science Dep. Babylon Iraq Technology University Control and Systems Engineering Dep. Baghdad Iraq

In this paper, a robust technique based on discrete wavelet transform, edge detection, and morphology operation for scene text detection is proposed. There are several stages in the proposed method. In the first stage, a single wavelet decomposition LH, HL and HH subbands are applied for detecting edges in original scene text image. The projection technique is applied in the second stage to preliminary detect text and non-text pixels. In third stage, 4-connected components are applied, and then area geometric feature is used as threshold to remove non-text region. At last stage, morphological operations are applied to connect isolated text components and to remove non-text regions. The proposed method is applied on a various images such as images of low contrast, complex background images and images of different fonts and size of text. The experimental results show that the proposed method can detect regions of the text perfectly. © 2016 The Authors

关键词： Connected components DWT Image projection Morphological operator

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Application of Typical Meteorological Years for Sizing Building Integrated PV Systems under Zero Load Rejections

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Energy Procedia 2017年 105卷 881-887页

作者： K.A. Kavadias D. Zafirakis A.G. Paliatsos Soft Energy Applications and Environmental Protection Laboratory Mechanical Engineering Dep. Piraeus University of Applied Sciences P.O. Box 41046 Athens 12201 Greece Lab of Environmental Technology Electronic Computer Systems Engineering Dep. Piraeus University of Applied Sciences P.O. Box 41046 Athens 12201 Greece

Autonomous photovoltaic systems have already been proved as one of the most reliable ways to handle the electrification requirements of remote consumers in isolated areas. The technology improvement in the field of building integrated photovoltaic systems, along with the governmental financial incentives for boosting the corresponding energy sector, have increased the interest of installing small scale photovoltaic systems not only in remote dwellings but also in grid-connected households. The penetration of photovoltaic systems in densely populated areas has made people even more familiar with them and therefore people with environmental consciousness are more likely to adopt the specific technology. In this context, the present work aims in highlighting the capabilities of building integrated photovoltaic systems along with battery storage devices in covering the electrical needs of a typical dwelling using real electricity demand and meteorological data based on Typical Meteorological Year time series. The system is simulated on an hourly basis by using an integrated numerical code that has been developed by the Soft Energy Applications & Environmental Protection Laboratory of the Mechanical engineering dep.. of Piraeus University of Applied Sciences in Greece. The proposed solution guarantees zero load rejections under different solar potential schemes investigating also the possibilities of minimizing the storage system capacity.

关键词： RES power PV systems BIPV Building integrated photovoltaic systems

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Joining of non-weldable AA7075 and weldable AA6082 aluminium alloy sheets by Friction Stir Welding

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IOP Conference Series: Materials Science and engineering 2018年第1期448卷

作者： Zsolt Kovács Ferenc Hareancz John von Neumann University GAMF Faculty of Engineering and Computer Science Dep. of Vehicle Technology Kecskemét H-6000 Hungary

In this work, an attempt has been made to join the AA6082-T651 and AA7075-T651 aluminium alloys by friction stir welding (FSW). The FSW is a solid-state joining process which primarily used on aluminium because the metal is not melted during the process so the base material can not soften. For the welding were using cylindrical pin tool, marble table to avoid the harmful heat conduction, two rotation rate of 500 and1000 rpm and different traverse speeds of 15, 20, 25 and 30 mm/min to weld butt joints. The aim of present study were to experimentally explore the dissimilar bounds. For evaluations, hardness testing were using to create hardness profiles across the joint in through thickness direction and optical microscope to classify the microstructures and crystallographic textures of base materials (BM). Based on the results obtained it can be stated that the FSW suitable for AA7075 and AA6082 welding by further optimization of the process parameters.

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