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International Conference in Energy and Sustainability in Small Developing Economies (ES2DE)

作者： Alena Košťálová Pedro M. S. Carvalho Marek Kubalčík Dep. of Computer and Communication Systems Tomas Bata University in Zlin Czech Republic Electrical Engineering and Computer Dep. Instituto Superior Tecnico Lisbon Portugal Department of Process Control Tomas Bata University in Zlin Czech Republic

The demand on distribution network reconfiguration abilities is increasing. This paper proposes a Finite State Automaton model of a distribution network that deals with topologically safe reconfiguration. Autonomous operation of distribution networks can be designed, analysed and implemented in day-to-day operation with the aid of these automata: through supervisory control. Two approaches to supervisor design are proposed. One for the normal operating mode and the other for the contingency mode. Simple and comprehensive examples illustrate the approaches.

关键词： Switches Automata Power cables Substations Electronic mail Power system reliability

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Recent architectural developments for reducing power consumption and increasing performance

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Recent Patents on computer science 2016年第1期9卷 89-98页

作者： Ozkul, Tarik Tuffaha, Mohammed A. Elhiny, Lamees Computer Science and Engineering Dep. American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates

Background: Power consumption has become one of the most serious obstacles ahead of performance increase. Due to increased power consumption, increasing number of transistors does not seem to be viable anymore. We are being forced to consider other ways of increasing performance without increasing power consumption. To find solution to the problem, the power consumption issue is being looked at more and more carefully at architectural level. Methods: Recent publications and patent databases are reviewed to find extraordinary and innovative architectural techniques developed for reducing power consumption and increasing performance. Results: In most of the cases the focus was specifically on memory area because of the studies that indicated that memory is the biggest power consumer in a typical processor system. The focus of the most methods was also on the cache memory part of the processor system since cache memory is a part that is used with every instruction execution. Any reduction in power cost of the cache memory results in sizable power reduction. Among the methods suggested were techniques of linking cache memory cells to reduce number of operations, reducing size of the cache memory by using multiple small cache memories activated one at a time. Conclusion: Based on the study it can be concluded that future innovative developments to reduce power consumption should concentrate on: a) Main memory part: to reduce the power consumption of main memory by turning on/off unused blocks of memory without effecting performance, b) Cache memory part: use of cache memory efficiently without decreasing performance, c) Efficient multiprocessing architectures. By integrating above mentioned methods to multiprocessors it may be possible to reduce the power consumption further. © 2016 Bentham science Publishers.

关键词： Cache memory

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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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A new predictive approach to variables selection through Genetic Algorithm and Fuzzy Adaptive Resonance Theory Using medical diagnosis as a case

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Procedia computer science 2017年 109卷 448-457页

作者： Choukri Djellali Mehdi Adda Mathematics Computer Science and Engineering Dep. University of Quebec At Rimouski 300 Allée des Ursulines Rimouski QC G5L 3A1 Canada

Variables selection is challenging task due mainly to huge search space. This study addresses the increasingly encountered chal- lenge of variables selection. It addresses the application of machine learning techniques to the problem of variables selection. We detailed the various models of the variables selection and examined the basic steps that are used to select the cost-effective predictors. We also walked through the initial settings and all variables selection stages, including architecture configuration, strat- egy generation, learning, model induction, and scoring. Results from this study show that the cost and generalization were seen to improve significantly in terms of computing time and recognition accuracy when the proposed system is applied for medical diagnosis. Good comparisons with an experimental study demonstrate the multidisciplinary applications of our approach.

关键词： Data Mining Pattern Recognition Machine Learning Clustering Variables Selection Genetic Algorithm

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A new scalable aggregation scheme for fuzzy clustering taking unstructured textual resources as a case 16

A new scalable aggregation scheme for fuzzy clustering takin...

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20th International Database engineering and Applications Symposium, IDEAS 2016

作者： Djellali, Choukri Adda, Mehdi Mathematics Computer Science and Engineering Dep. University of Quebec at Rimouski Rimouski Canada

ISBN: (纸本)9781450341189

The performance of clustering is a crucial challenge, especially for pattern recognition. The models aggregation has a positive impact on the efficiency of Data clustering. This technique is used to obtain more cluttered decision boundaries by aggregating the resulting clustering models. In this paper, we study an aggregation scheme to improve the stability and accuracy of clustering, which allows to find a reliable and robust clustering model. We demonstrate the advantages of our aggregation method by running Fuzzy C-Means (FCM) clustering on Reuters-21578 corpus. Experimental studies showed that our scheme optimized the bias-variance on the selected model and achieved enhanced clustering for unstructured textual resources. © ACM 2016.

关键词： Fuzzy clustering

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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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General Quantized Innovation Kalman Filter for Stochastic Uncertain systems with Random Packet Dropouts

General Quantized Innovation Kalman Filter for Stochastic Un...

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Youth Academic Conference of Chinese Association of Automation

作者： Huai min Li Qiang Ling School of Computer and Information Engineering Fuyang Normal University Fuyang 236037 China Dep. of Automation University of Science and Technology of China Hefei 230027 China

ISBN: (纸本)9781538629024

Due to of the bandwidth constraint, sensors may only be able to transmit a finite number of bits to save the energy, and the measurement data may have to be quantized before transmission especially in wireless sensor networks (WSNs). This paper studies the problem of the general quantized innovation filtering with random packet dropouts for linear stochastic uncertain systems. The multiplicative uncertainty of system parameters is first converted into additive noises. Then under the Gaussian assumption on the predicted density, the Lloyd-Max quantizer, a general quantized innovation filter with random packet dropouts in the linear minimum mean square error (LMMSE) sense is derived based on the projection theory and Bayes Rule. Furthermore a sufficient condition is provided, under which a general quantized innovation filter with random packet dropouts can be reduced into a standard Kalman filter. An example is simulated to illustrate the effectiveness and correctness of the designed filter.

关键词： General Quantized Innovation Filter Stochastic Uncertain System Packet Dropouts

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Interventional dep.ndency graphs: An approach for discovering influence structure

Interventional dependency graphs: An approach for discoverin...

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2016 IEEE International Symposium on Information Theory, ISIT 2016

作者： Etesami, Jalal Kiyavash, Negar Dep. of Industrial and Enterprise Systems Eng. Coordinated Science Lab. UIUC UrbanaIL61801 United States Dep. of Industrial and Enterprise Systems Eng. Dep. of Electrical and Computer Eng. Coordinated Science Lab. UIUC UrbanaIL61801 United States

ISBN: (纸本)9781509018062

In this paper, we introduce a new type of graphical model, interventional dep.ndency graphs, to encode interactions among processes. These type of graphical models are defined using a measure that captures the influence relationships based on the principle of intervention. Principle of intervention discovers an influence relationship by making assignment to certain variables while fixing other variables to see how these changes influence statistics of variables of interest. Furthermore, we derive some properties of the dynamics that can be inferred from these graphs and establish the relationship between this new graphical model and the directed information graphs used for causal inference. © 2016 IEEE.

关键词： Graphic methods

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Performance characterization of image feature detectors in relation to the scene content utilizing a large image database

arXiv

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arXiv 2017年

作者： Ferrarini, Bruno Ehsan, Shoaib Leonardis, Ales Rehman, Naveed Ur McDonald-Maier, Klaus D. University of Essex School of Computer Science and Electronic Engineering ColchesterCO4 3SQ United Kingdom Dep. of Electrical Engineering COMSATS Institute of Information Technology Islamabad Pakistan School of Computer Science University of Birmingham Birmingham United Kingdom

Selecting the most suitable local invariant feature detector for a particular application has rendered the task of evaluating feature detectors a critical issue in vision research. Although the literature offers a variety of comparison works focusing on performance evaluation of image feature detectors under several types of image transformations, the influence of the scene content on the performance of local feature detectors has received little attention so far. This paper aims to bridge this gap with a new framework for determining the type of scenes which maximize and minimize the performance of detectors in terms of repeatability rate. The results are presented for several state-of-the-art feature detectors that have been obtained using a large image database of 20482 images under JPEG compression, uniform light and blur changes with 539 different scenes captured from real-world scenarios. These results provide new insights into the behavior of feature detectors. Copyright © 2017, The Authors. All rights reserved.

关键词： Feature extraction

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Distribution of load change in industrial demand: A DOE approach

Distribution of load change in industrial demand: A DOE appr...

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Innovative Smart Grid Technologies (ISGT)

作者： Mostafa G. Varzaneh Rupy Sawhney Hesam Shams Ailin Asadinejad Dep. of Industrial and Systems Engineering Dep. of Electrical Engineering and Computer Science University of Tennessee-Knoxville

ISBN: (纸本)9781509051687

Estimating distribution of load change in response to demand management programs has been targeted in many researches, mostly based on economical and business sale-price models. In this paper a bottom-up analysis approach will be considered. As the first step consumer's decision making process has been approximated using mathematical modeling. In this step a novel optimization model for production scheduling will be introduced which takes into account different energy consumption states. In the second step a design of experiment (DOE) model will be developed base on different energy and production factors. In the third step, two new distributions will be introduced based on a variable selected in DOE analysis. The proposed distributions can be obtained based on significant variables and be utilized in market analysis and more specifically, in stochastic analysis.

关键词： Production Energy consumption Mathematical model Biological system modeling Elasticity Load modeling

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