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Reduction of discrete linear repetitive processes to nonsingular Roesser models via elementary operations

IFAC-PapersOnLine 2017年第1期50卷 1865-1870页

作者： Boudellioua M.S. Gałkowski K. Rogers E. Department of Mathematics and Statistics Sultan Qaboos University Muscat Oman Institute of Control and Computation Engineering University of Zielona Góra ul. Szafrana 2 Zielona Góra65-516 Poland Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom

A method based on the elementary operations algorithm (EOA) is developed that reduces a system matrix describing a discrete linear repetitive process to a 2-D nonsingular Roesser form such that all the input-output properties, including the transfer-function matrix, are preserved. Some areas for possible future use/application of the developed results will also be briefly discussed. © 2017

关键词： 2-D discrete systems 2-D non-singular Roesser form Input-output equivalence Linear repetitive processes System matrix

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Raindrop prediction based on weather condition using HMLP neural network

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AIP Conference Proceedings 2018年第1期2016卷

作者： F. R. Hashim K. A. Ahmad A. S. N. Mokhtar M. I. Abdul Rahman M. F. Md Din M. K. Awang M. M. Ibrahim 1Department of Electrical & Electronic Engineering Faculty of Engineering National Defence University of Malaysia Kuala Lumpur Malaysia 2Faculty of Electronic and Computer Engineering Universiti Teknikal Melaka Melaka Malaysia

Artificial neural networks which are inspired with the concept of the biological neurons, in widely used medical field, prediction of weather, engineering and many more. Neural networks approaches are providing a solution to help in the decision-making process for prediction of weather as well as a prediction of raindrop. The research aims to establish the suitability and capability of neural networks in order to predict the raindrop based on three parameters; pressure, humidity and temperature. These parameters will be used as input to the classifier (neural network) and classified as percentage of rain to be happen. Hybrid multilayer perceptron (HMLP) network is proven to produce the results with accuracy percentage (98.53%).

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Heart abnormality activity detection using multilayer perceptron (MLP) network

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AIP Conference Proceedings 2018年第1期2016卷

作者： J. Adnan N. G. Nik Daud S. Ahmad M. H. Mat M. T. Ishak F. R. Hashim M. M. Ibrahim 1Department of Electrical & Electronic Engineering Faculty of Engineering National Defence University of Malaysia Kuala Lumpur Malaysia 2Faculty of Electronic and Computer Engineering Universiti Teknikal Melaka Melaka Malaysia

Heart abnormality refers to the irregular electrical activity of the heart. Heart abnormality sometimes does not show any symptom and it is not sensible which may lead to sudden death due to the heart cease functioning. This paper attempts to develop a program that is capable to detect the heart abnormality activity through the implementation of Multilayer Perceptron (MLP). A certain amount of data of the heartbeat signals from electrocardiogram (ECG) will be used in this project to train the MLP network and to test the network performance. The MLP are trained by several techniques which are Backpropagation (BP), Bayesian Regularization (BR) and Levenberg-Marquardt (LM).

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Improving performance of indoor visible light communication systems with hexagonal designed LED transmitters

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AIP Conference Proceedings 2018年第1期1997卷

作者： Mahmoud Khaled Aburub Ahmetjan Bekenov 1Department of Computer Engineering Cyprus International University Nicosia TRNC Mersin 10 Turkey 2Department of Electrical and Electronic Engineering Cyprus International University Nicosia TRNC Mersin 10 Turkey

We discuss a simulation program for indoor visible light communication system with hexagonal LED array shape that will allow us to focus the luminance of optical light for the room center with neglecting of the boundary since they will be occupied by furniture. It is assumed that users will not be in those areas. We are going to model OOK, PPM and QAM modulation techniques with varied semi-angle degrees, as a result we want to prove with hexagonal shape we could make and uniform luminance in the room. MATLAB and Simulink will be used for simulation.

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Asymmetric natural convection flow in three dimensional attic space

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AIP Conference Proceedings 2019年第1期2116卷

作者： Cui Huimin Xu Feng C. Saha Suvash Liu Qingkuan 1Department of Mathematics and Physics Shijiazhuang Tiedao University Shijiazhuang 050043 China 2School of Civil Engineering Beijing Jiaotong University Beijing 100044 China 3Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment Beijing 100044 China 4School of Mechanical and Mechatronic Engineering Faculty of Engineering and Information Technology University of Technology Sydney Ultimo NSW 2007 Australia 5Wind Engineering Research Center Structure Health Monitoring and Control Institute Shijiazhuang Tiedao University Shijiazhuang 050043 China

Natural convection in an attic space with top cooling is investigated by three dimensional numerical simulation for a wide range of Rayleigh numbers. The numerical results show the development of natural convection flow in attic space. Three stages: an initial stage, a transitional stage and a fully developed stage are involved. At higher Rayleigh numbers, the flow in the attic space is three dimensional and asymmetry with respect to geometric symmetry plane. The critical Rayleigh number for asymmetric flow is found.

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Kinetics of microwave assisted extraction of pectin from Balinese orange peel using Pseudo-homogeneous model

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AIP Conference Proceedings 2018年第1期1941卷

作者： Megawati Ria Wulansarie Merisa Bestari Faiz Susatyo Adi Waliyuddin Sammadikun 1Department of Chemical Engineering Faculty of Engineering Universitas Negeri Semarang Semarang Indonesia 50229 2School of Chemical Engineering University of New South Wales Australia 3Computer Engineering Electrical Department Universitas Indonesia

The objective of this work was to study the homogeneous kinetics of pectin extraction of Balinese orange peel conducted using Microwave Assisted Extraction (MAE). The experimental data showed that the power increases (180 to 600 W), so that the extraction yield of pectin also increases (12.2 to 30.6 % w/w). Moreover, the extraction time is longer (10, 15, and 20 min) the yield of pectin increases (8.8, 20.2, and 40.5). At time after of 20 min (25 and 30 min), the yield starts to decrease (36.6 and 22.9). This phenomena shows pectin degradation. Therefore, pectin extraction is a series reaction, i.e. extraction and degradation. The calculation result showed that pseudo series homogeneous model can quantitatively describe the extraction kinetics. The kinetic constants can be expressed by Arrhenius equation with the frequency factors of 1.58 × 105 and 2.29 × 105 1/min, while the activation energies are 64,350 and 56,571 J/mole for extraction and degradation, respectively.

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Device-to-Device Communications Enabled Multicast Scheduling with the Multi-Level Codebook in mmWave Small Cells

arXiv

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arXiv 2018年

作者： Niu, Yong Yu, Liren Li, Yong Zhong, Zhangdui Ai, Bo Chen, Sheng State Key Laboratory of Rail Traffic Control and Safety Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China Department of Electronic Engineering Tsinghua University Beijing100084 China School of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom King Abdulaziz University Jeddah21589 Saudi Arabia

With the exponential growth of mobile data, there are increasing interests to deploy small cells in millimeter wave (mmWave) bands to underlay the conventional homogeneous macrocell network as well as in exploiting device-to-device (D2D) communications to improve the efficiency of the multicast service that supports content-based mobile applications. To compensate for high propagation loss in the mmWave band, high-gain directional antennas have to be employed, while it is critical to optimize multicast service in order to improve the network performance. In this paper, an efficient multicast scheduling scheme is proposed for small cells in the mmWave band, called MD2D, where both D2D communications in close proximity and multi-level antenna codebook are utilized. Specifically, a user partition and multicast path planning algorithm is proposed to partition the users in the multicast group into subsets and to determine the transmission node for each subset, so as to achieve optimal utilization of D2D communications and multilevel antenna codebook. Then a multicast scheduling algorithm schedules the transmission for each subset. Furthermore, in order to optimize the network performance, the optimal choice of user partition thresholds is analyzed. Performance evaluation demonstrate that the MD2D achieves the best performance, in terms of network throughput and energy efficiency, compared with other existing schemes. MD2D improves the network throughput compared with the second-best scheme by about 27%. Copyright © 2018, The Authors. All rights reserved.

关键词： Scheduling algorithms

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Optimal decentralized control of large scale systems

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control Theory and Technology 2016年第4期14卷 287-313页

作者： Xiao Qi SHI Daniel E. DAVISON Raymond KWONG Edward J. DAVISON Systems Control Group Department of Electrical and Computer Engineering University of Toronto Ontario Canada MSS 3G4 Department of Electrical and Computer Engineering University of Waterloo Ontario Canada N2L 3G1

This paper presents a new optimized decentralized controller design method for solving the tracking and disturbance rejection problems for large-scale linear time-invariant systems, using only low-order decentralized controllers. To illustrate the type of results which can be obtained using the new optimized decentralized control design method, the control of a large flexible space structure is studied and compared with the standard centralized LQR-observer controller. The order of the resultant decentralized controller is much smaller than that of the standard centralized LQR-observer controller. The proposed controller also has certain fail-safe properties and, in addition, it can be five orders of magnitude more robust than the standard LQR-observer controller based on their real stability radii. The new decentralized controller design method is applied to a large flexible space structure system with 5 inputs and 5 outputs and of order 24.

关键词： Decentralized control multivariable control PID control robustness optimization large-scale systems flexiblestructures

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Filter optimization and artifacts estimation for orthogonal frequency division multiplexing with multi line transmission in ultrasound imaging

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Proceedings of Meetings on Acoustics 2019年第1期39卷

作者： Yue Song Alessandro Ramalli Enrico Boni Libertario Demi 1Department of Information Engineering and Computer Science University of Trento Trento Alto Adige 38123 ITALY songyue19960927@*** libertario.demi@unitn.it 2KU Leuven Leuven Flanders 3000 BELGIUM alessandro.ramalli@kuleuven.be 3University of Florence Florence Tuscany 50100 ITALY enrico.boni@unifi.it

Multi line transmission (MLT) and orthogonal frequency division multiplexing (OFDM) are two types of approaches which have been individually applied to increase the ultrasound data acquisition rate. Only recently these two techniques have been combined in the search for an additional improvement of the data-acquisition rate. While MLT essentially relies on beams spatial-separations in order to maintain a low interbeam cross- talk and form multiple image-lines simultaneously, OFDM mitigates interbeam cross-talk by assigning to each beam a fraction of the transducer bandwidth. However, generating multiple beams during the transmission phase deteriorates image quality. In particular, imaging artifacts are generated as a consequence of interbeam cross-talk. In this work, results from a filter optimization study are reported and discussed. Data as obtained from wire targets have been analysed to asses the impact of filter type, order and bandwidth on key imaging features, i.e. axial resolution, interbeam cross-talk and artifacts area. The ULA-OP 256 system equipped with a 2.4 MHz phased array was employed to collect the data.

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Ergodicity-breaking reveals time optimal economic behavior in humans

arXiv

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arXiv 2019年

作者： Meder, David Rabe, Finn Morville, Tobias Madsen, Kristoffer H. Koudahl, Magnus T. Dolan, Ray J. Siebner, Hartwig R. Hulme, Oliver J. Danish Research Centre for Magnetic Resonance Centre for Functional and Diagnostic Imaging and Research Copenhagen University Hospital Hvidovre Kettegard Allé 30 Hvidovre2650 Denmark Neural Control of Movement Lab ETH Zurich Winterthurerstrasse 190 Building Y36 Zurich8057 Switzerland Department of Applied Mathematics and Computer Science Technical University of Denmark Kongens Lyngby2800 Denmark Department of Electrical Engineering Eindhoven University of Technology Eindhoven6500 MB Netherlands Max Planck UCL Centre for Computational Psychiatry and Ageing Research 10-12 Russell Square LondonWC1B5EH United Kingdom Department of Neurology Copenhagen University Hospital Bispebjerg Bispebjerg Bakke 23 Copenhagen2400 Denmark Institute for Clinical Medicine Faculty of Medical and Health Sciences University of Copenhagen Blegdamsvej 9 Copenhagen2100 Denmark

Ergodicity describes an equivalence between the expectation value and the time average of observables. Applied to human behaviour, ergodic theory reveals how individuals should tolerate risk in different environments. To optimise wealth over time, agents should adapt their utility function according to the dynamical setting they face. Linear utility is optimal for additive dynamics, whereas logarithmic utility is optimal for multiplicative dynamics. Whether humans approximate time optimal behavior across different dynamics is unknown. Here we compare the effects of additive versus multiplicative gamble dynamics on risky choice. We show that utility functions are modulated by gamble dynamics in ways not explained by prevailing economic theory. Instead, as predicted by time optimality, risk aversion increases under multiplicative dynamics, distributing close to the values that maximise the time average growth of wealth. We suggest that our findings motivate a need for explicitly grounding theories of decision-making on ergodic considerations. Copyright © 2019, The Authors. All rights reserved.

关键词： Dynamics

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