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The International Conference on Informatics and Systems (INFOS)

作者： Tahani Mahmoud Allam Alsayed Abdelhameed Sallam Hatem M. Abdullkader Computer and Automatic Control Department Faculty of Engineering Tanta University Tanta Egypt Information System Department Faculty of Computers and Information Menofia University Menofia Egypt

N-grams are a building block in natural language processing and information retrieval. It is a sequence of a string data like contiguous words or other tokens in text documents. In this work, we study how N-gram can be computed efficiently using a MapReduce for distributed data processing and a distributed database named Hbase This technique is applied to construct the training and testing processes using Hadoop MapReduce framework and Hbase. We proposed to focus on the time cost and storage size of the model and exploring different structures of Hbase table. By constructing and comparing a different table structures on training 100 million words for unigram, bigram and trigram models we suggest a table based on half ngram structure is a more suitable choice for distributed language model. The results of this work can be applied in the cloud computing and other large scale distributed language processing areas.

关键词： Computational modeling Training Smoothing methods Context Testing Informatics Distributed computing

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New Kinematic Notation and automatic Generation of Symbolic Dynamics Equations for Space Robots 33

New Kinematic Notation and Automatic Generation of Symbolic ...

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第三十三届中国控制会议

作者： ZHANG Hui JIA Yingmin DU Junping ZHANG Jun The Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and TechnologyBeijing University of Posts and Telecommunications School of Electronic and Information Engineering Beihang University (BUAA)

ISBN: (纸本)9781479947249

To verify and evaluate the performance of a space robot controller,kinematics and dynamics of the system have to be formed beforehand for computer *** paper is devoted to develop a new kinematic notation for space robots and to come up with an open source of Matlab subroutines for the propose of obtaining the proper dynamics equations of space robots in symbolic forms *** the new kinematic notation,we will present the general form and two special *** is then demonstrated through an example the advantages such as flexible assignment of frames on space robots,being able to describe multi-DOF joint and achieve a consistent description for multi-arm space *** the second part,we adopt the Lagrangian Formulation for forming the procedures to automatically generate the dynamics equations of space robots in symbolic *** example is then provided to demonstrate the effectiveness of closed-loop simulation adopting the obtained symbolic equations.

关键词： Space Robots,Kinematics,Dynamics,Symbolic Dynamics Equations,Lagrangian

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Exponential Stability and Stabilization of nD Systems

Exponential Stability and Stabilization of nD Systems

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IEEE Annual Conference on Decision and control

作者： Pavel Pakshin Julia Emelianova Krzysztof Galkowski Eric Rogers Arzamas Polytechnic Institute of R.E. Alekseev Nizhny Novgorod State Technical University 19 Kalinina Street Arzamas 607227 Russia Institute of Control and Computation Engineering University of Zielona Gora ul. Podgorna 50 65-246 Zielona Gora Poland Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ UK

ISBN: (纸本)9781479978878

The paper considers nonlinear nD discrete and continuous systems described by a state-space model of the Roesser form where the property of exponential stability is characterized by use of a vector Lyapunov function. The property of exponential dissipativity is defined and a particular case of this property, termed exponential passivity, is used, together with a vector storage function, to develop a new method for output based control law design. An example of a system with nonlinear actuator dynamics is given to demonstrate the application effectiveness of the new results.

关键词： Stability analysis State-space methods control theory Lyapunov methods Mathematical model Laser stability

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Network design for distributed consensus estimation over heterogeneous sensor networks 19

Network design for distributed consensus estimation over het...

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19th IFAC World Congress on International Federation of automatic control, IFAC 2014

作者： Yang, Wen Shi, Ling Yuan, Ye Wang, Xiaofan Shi, Hongbo Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai200237 China Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong Hong Kong Department of Engineering University of Cambridge United Kingdom Department of Automation Shanghai Jiao Tong University Shanghai200240 China

ISBN: (纸本)9783902823625

This paper considers distributed estimation over heterogeneous sensor networks. We propose a distributed estimation strategy based on PageRank algorithm, where the link weight depends on the edge estimation covariances. We prove that the proposed estimator obtains better estimates than one typical estimator under identical initial conditions. Motivated by the advantage of the sensors with high accuracy locating at important positions, we propose an optimal sensor deployment strategy to arrange locations for sensors in a given physical network. Numerical examples are provided to demonstrate the effectiveness of the proposed estimator, showing a better performance under the optimal sensor deployment. © IFAC.

关键词： Sensor networks

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Stability of Stochastic Repetitive Processes

Stability of Stochastic Repetitive Processes

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IEEE Annual Conference on Decision and control

作者： Pavel Pakshin Julia Emelianova Mikhail Emelianov Krzysztof Galkowski Eric Rogers Arzamas Polytechnic Institute of R.E. Alekseev Nizhny Novgorod State Technical University 19 Kalinina Street Arzamas 607227 Russia Institute of Control and Computation Engineering University of Zielona Gora ul. Podgorna 50 65-246 Zielona Gora Poland Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ UK

ISBN: (纸本)9781479978878

The paper considers nonlinear discrete and differential stochastic repetitive processes using the state-space model setting. These processes are a particular case of 2D systems that have their origins in the modeling of physical processes. Using a vector Lyapunov function method sufficient conditions for stability in the mean square are obtained in the stochastic setting, where the vast majority of the currently known results are for deterministic dynamics. Based on these results the property of stochastic dissipativity in the second moment is introduced and then a particular case of this property, termed exponential passivity in the second moment, is used, together with a vector storage function, to develop a new method for output feedback based control law design. An example of a system with nonlinear actuator dynamics and state-dependent noise is given to demonstrate effectiveness of the new results.

关键词： mean square second moment Stochastic Repetitive Sufficient conditions State space models Output feedback control law Physical Processes origins

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Family Competition Pheromone Genetic Algorithm for Comparative Genome Assembly

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Journal of Electronic science and Technology 2014年第4期12卷 405-409页

作者： Chien-Hao Su Chien-Shun Chiou Jung-Che Kuo Pei-Jen Wang Cheng-Yan Kao Hsueh-Ting Chu the Biodiversity Research Center Academia Sinica the Center for Research Diagnostics and Vaccine Development Centers for Disease Control the Department of Computer Science and Information Engineering National Taiwan University the Department of Computer Science and Information Engineering Asia University

Genome assembly is a prerequisite step for analyzing next generation sequencing data and also far from being solved. Many assembly tools have been proposed and used extensively. Majority of them aim to assemble sequencing reads into contigs; however, we focus on the assembly of contigs into scaffolds in this paper. This is called scaffolding, which estimates the relative order of the contigs as well as the size of the gaps between these contigs. Pheromone trail-based genetic algorithm （PGA） was previously proposed and had decent performance according to their paper. From our previous study, we found that family competition mechanism in genetic algorithm is able to further improve the results. Therefore, we propose family competition pheromone genetic algorithm （FCPGA） and demonstrate the improvement over PGA.

关键词： Genetic algorithm genome typing,next generation sequencing.

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Distributed Adaptive Two-stage Kalman Filter for Target Tracking in the Presence of Unknown Dynamic Bias 33

Distributed Adaptive Two-stage Kalman Filter for Target Trac...

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第三十三届中国控制会议

作者： ZHANG Cui JIA Yingmin DU Junping ZHANG Jun The Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and TechnologyBeijing University of Posts and Telecommunications School of Electronic and Information Engineering Beihang University (BUAA)

ISBN: (纸本)9781479947249

This paper is concerned with the problem of tracking target with multiple sensors in the presence of unknown dynamic bias. A suboptimal adaptive two-stage Kalman filter(ATKF) is designed with two reduce-order filters to estimate the target state and the dynamic bias in parallel when the bias model information is incomplete. Moreover, a distributed adaptive two-stage Kalman filter(DATKF) is developed for multi-sensor system based on the ATKF. The effectiveness of the ATKF and the DATKF are illustrated by the Monte Carlo simulation results.

关键词： Dynamic Bias,Adaptive Two-stage Kalman Filter,Distributed Fusion,Multi-sensor System

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Average Consensus in the Presence of Dynamically Changing Directed Topologies and Time Delays

Average Consensus in the Presence of Dynamically Changing Di...

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IEEE Annual Conference on Decision and control

作者： Themistoklis Charalambous Christoforos N. Hadjicostis Automatic Control Lab Electrical Engineering Department and ACCESS Linnaeus Center Royal Institute of Technology (KTH) Stockholm Sweden Department of Electrical and Computer Engineering at the University of Cyprus Nicosia Cyprus

ISBN: (纸本)9781467360890

We have recently proposed a robustified ratio consensus algorithm which achieves asymptotic convergence to the global average in a distributed fashion in static strongly connected digraphs, despite the possible presence of bounded but otherwise arbitrary delays. In this work, we propose a protocol which reaches asymptotic convergence to the global average in a distributed fashion under possible changes in the underlying interconnection topology (e.g., due to component mobility), as well as time-varying delays that might affect transmissions at different times. More specifically, we extend our previous work to also account for the case where, in addition to arbitrary but bounded delays, we may have time varying communication links. The proposed protocol requires that each component has knowledge of the number of its outgoing links, perhaps with some bounded delay, and that the digraphs formed by the switching communication topologies over a finite time window are jointly strongly connected.

关键词： directed graphs time varying Time windows Arbitrary Bounded delay presences

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High dielectric material dependence of carbon nanotube field effect transistor considering non-ballistic conduction

High dielectric material dependence of carbon nanotube field...

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作者： Rouf, Nirjhor Tahmidur Deep, Ashfaqul Haq Hassan, Rusafa Binte Khan, Sabbir Ahmed Hasan, Mahmudul Mominuzzaman, Sharif Mohammad Control and Applications Research Centre BRAC University Dhaka1212 Bangladesh Department of Electrical and Electronic Engineering BRAC University Dhaka1212 Bangladesh BRACU Robotics Research Lab School of Engineering and Computer Science BRAC University Dhaka1212 Bangladesh Department of Electrical and Electronic Engineering Bangladesh University of Engineering and Technology Dhaka1000 Bangladesh

As a result of this reported research, a simulation model to analyse the behaviour of carbon nanotube field effect transistors (CNTFETs) under non-ballistic conditions is explained and the effect of gate dielectric on the performance of CNTFETs has been explored in detail. For the first time, a thorough study of the combined non-ballistic effect on the performance of CNTFETs has been conducted and the output of the device has been analysed. It has been observed that a gate material with a high dielectric constant leads to higher on-state current and higher on and off state current ratio. In addition, the transconductance, total capacitance, charging energy, subthreshold swing (S), drain-induced barrier lowering (DIBL) and gain with respect to the dielectric constant have been observed and analysed. Transconductance and total capacitance increases by a significant amount, while charging energy and S decrease as the dielectric value increases. The DIBL and gain vary slightly as a higher value dielectric material is used as a gate. Furthermore, the results of this study have been plotted against previously reported ballistic outputs to provide a better perception of the deviation from ideal behaviour. At the same time, the outcomes of this analysis have been compared against some reported experimental values. © The Institution of engineering and Technology 2014.

关键词： Ballistics

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Embedding of Nonlinear Systems in a Linear Parameter-Varying Representation

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IFAC Proceedings Volumes 2014年第3期47卷 6907-6913页

作者： Hossam S. Abbas Roland Tóth Mihály Petreczky Nader Meskin Javad Mohammadpour Department of Electrical Engineering College of Engineering Qatar University PO Box 2713 Doha Qatar Electrical Engineering Department Faculty of Engineering Assiut University Assiut Egypt Control Systems Group Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands Department of Computer Science and Automatic Control Ecole des Mines de Douai 59508 Douai France Intelligent Control Systems Lab College of Engineering The University of Georgia Athens GA 30602 USA

This paper introduces a systematic approach to synthesize linear parameter-varying (LPV) representations of nonlinear (NL) systems which are originally defined by control affine state-space representations. The conversion approach results in LPV state-space representations in the observable canonical form. Based on the relative degree concept of NL systems, the states of a given NL representation are transformed to new coordinates that provide its normal form. In the SISO case, all nonlinearities of the original system are embedded in one NL function which is factorized to construct the LPV form. An algorithms is proposed for this purpose. The resulting transformation yields an LPV model where the scheduling parameter depends on the derivatives of the inputs and outputs of the system. In addition, if the states of the NL model can be measured or estimated, then the procedure can be modified to provide LPV models scheduled by these states. Examples are included for illustration.

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