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A novel hardware implementation of ids method
, Article IEICE Electronics Express ; Volume 6, Issue 23 , 2009 , Pages 1626-1630 ; 13492543 (ISSN) ; Bagheri Shouraki, S ; Khasteh, S. H ; Sharif University of Technology
2009
Abstract
ALM is an adaptive recursive algorithm which tries to express a multi-input multi-output system as a fuzzy combination of some single-input single-output systems. It uses a fuzzy curve fitting technique for behavior extraction or finding the input-output transfor-mation of each of the single-input single-output systems, which called ink drop spread (IDS). In this paper we present a new implementation of a hardware unit implementing the ink drop spread (IDS) method
Genetic ink drop spread
, Article 2008 2nd International Symposium on Intelligent Information Technology Application, IITA 2008, Shanghai, 21 December 2008 through 22 December 2008 ; Volume 2 , January , 2008 , Pages 603-607 ; 9780769534978 (ISBN) ; Shouraki, S. B ; Beigy, H ; Khasteh, H ; Enayati, E ; Sharif University of Technology
2008
Abstract
This paper describes a genetic-fuzzy system adapted to find efficient partitions on data domains for IDS (Ink Drop Spread). IDS is the engine of Active Learning Method (ALM), a methodology of soft computing. IDS extracts useful information from a system subjected to modeling. Proposed method, called GIDS (Genetic IDS), uses genetic algorithm which optimizes the parameters of membership functions that represent the partitions on data planes. Obtained Results showed that using genetic algorithm to find the partitions has better accuracy than the previous generic IDS methods. © 2008 IEEE
A learning based method for topology control in wireless sensor networks
, Article 5th International Conference on Autonomic and Autonomous Systems, ICAS 2009, Valencia, 20 April 2009 through 25 April 2009 ; 2009 , Pages 51-55 ; 9780769535845 (ISBN) ; Shouraki, S. B ; Sharif University of Technology
2009
Abstract
Topology Control (TC) is one of the most important techniques used in wireless ad hoc and sensor networks to reduce energy consumption and radio interference, The goal of this technique is to control the topology of the graph representing the communication links between network nodes with the purpose of maintaining some global graph property (e.g., connectivity), while reducing energy consumption and/or interference that are strictly related to the nodes' transmitting range. In this paper we present a new distributed learning based method to choose nodes transmitting range, in this method we run a range adjustment mechanism periodically to choose a near optimal transmitting range, we don't...
Reinforcement learning based on active learning method
, Article Proceedings - 2008 2nd International Symposium on Intelligent Information Technology Application, IITA 2008, 21 December 2008 through 22 December 2008, Shanghai ; Volume 2 , 2008 , Pages 598-602 ; 9780769534978 (ISBN) ; Bagheri Shouraki, S ; Khasteh, H ; Kiaei, A. A ; Sharif University of Technology
2008
Abstract
In this paper, a new reinforcement learning approach is proposed which is based on a powerful concept named Active Learning Method (ALM) in modeling. ALM expresses any multi-input-single-output system as a fuzzy combination of some single-input-singleoutput systems. The proposed method is an actor-critic system similar to Generalized Approximate Reasoning based Intelligent Control (GARIC) structure to adapt the ALM by delayed reinforcement signals. Our system uses Temporal Difference (TD) learning to model the behavior of useful actions of a control system. The goodness of an action is modeled on Reward-Penalty-Plane. IDS planes will be updated according to this plane. It is shown that the...
A new approach for integrated coverage and connectivity in wireless sensor networks
, Article Computer Communications ; Volume 36, Issue 1 , Volume 36, Issue 1 , 2012 , Pages 113-120 ; 01403664 (ISSN) ; Bagheri Shouraki, S ; Hajiabdorahim, N ; Dadashnialehi, E ; Sharif University of Technology
2012
Abstract
An effective approach for energy conservation in wireless sensor networks is scheduling sleep intervals for extraneous nodes while the remaining nodes stay active to provide continuous service. For the sensor network to operates successfully, the active nodes must maintain both sensing coverage and network connectivity. It has been proved before if the communication range of nodes is at least twice the sensing range, complete coverage of a convex area implies connectivity among the working set of nodes. In this paper first we consider a rectangular region A = a * b, such that Rs≤a, Rs≤b where Rs is the sensing range of node, and put a constraint on minimum allowed distance between nodes (...
Communication protocol evolution by natural selection
, Article CIMCA 2006: International Conference on Computational Intelligence for Modelling, Control and Automation, Jointly with IAWTIC 2006: International Conference on Intelligent Agents Web Technologies and International Commerce, Sydney, NSW, 28 November 2006 through 1 December 2006 ; 2006 ; 0769527310 (ISBN); 9780769527314 (ISBN) ; Shouraki, S. B ; Halavati, R ; Lesani, M ; Sharif University of Technology
IEEE Computer Society
2006
Abstract
One of the most important issues discussed in multi-agent systems, is communication between agents. Usually, a predefined communication protocol is used, but predefining a protocol between agents causes some problems; for example it is possible that agents recognize a subject that is not defined in their protocol so they can't express anything about it. In this paper we propose a new method for evolution of a communication protocol between intelligent agents by using natural selection mechanism. Experimental results will be discussed in detail. © 2006 IEEE
Evolution of a communication protocol between a group of intelligent agents
, Article 2006 World Automation Congress, WAC'06, Budapest, 24 June 2006 through 26 June 2006 ; 2006 ; 1889335339 (ISBN); 9781889335339 (ISBN) ; Shouraki, S. B ; Halavati, R ; Khameneh, E ; Sharif University of Technology
IEEE Computer Society
2006
Abstract
One of the most important issues that be discussed in multi-agent systems, is the communication between agents. In existing applications usually a communication protocol defined between agents. But defining a protocol between agents cause some problems; for example it is possible that agents recognize a subject, but because it is not defined in their protocol, they can't express any thing about that. In this paper we propose a new method for evolution of a communication protocol between intelligent agents, after that the experimental results will be discussed and at the end of the paper future works and conclusion. Copyright - World Automation Congress (WAC) 2006
A new sufficient condition for 1-coverage to imply connectivity
, Article 3rd International Conference on Digital Information Management, ICDIM 2008, London, 13 November 2008 through 16 November 2008 ; January , 2008 , Pages 495-499 ; 9781424429172 (ISBN) ; Bagheri Shouraki, S ; Kiaei, A. A ; Sharif University of Technology
2008
Abstract
An effective approach for energy conservation in wireless sensor networks is scheduling sleep intervals for extraneous nodes while the remaining nodes stay active to provide continuous service. For the sensor network to operate successfully the active nodes must maintain both sensing coverage and network connectivity, It proved before if the communication range of nodes is at least twice the sensing range, complete coverage of a convex area implies connectivity among the working set of nodes. In this paper we consider a rectangular region A =a *b , such that Rs ≤ a, Rs ≤ b where Rs is the sensing range of nodes. and put a constraint on minimum allowed distance between nodes( Rs ). according...
A new approach to sonar based indoor mapping localization
, Article DETC2005: ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Long Beach, CA, 24 September 2005 through 28 September 2005 ; Volume 7 B , 2005 , Pages 891-901 ; 0791847446 (ISBN); 9780791847442 (ISBN) ; Kobravi, K ; Safyallah, H ; Moeeni, M ; Khatami, Y ; Khasteh, H ; Sharif University of Technology
American Society of Mechanical Engineers
2005
Abstract
Vehicle localization and environment mapping are the most essential parts of the robot navigation in unknown environments. Since the problem of localization in indoor environments is directly related to the problem of online map generation, in this paper a new and efficient algorithm for simultaneous localization and map generation is proposed and novel results for real environments are achieved. This new algorithm interprets and validates the raw sonar measurements in first step, and applies them to the environment map in the next step. There are various adjustable parameters which make the algorithm flexible for different sonar types. This algorithm is efficient and is robust to sonar...
Distributed Learning in Wireless Sensor Networks
, Ph.D. Dissertation Sharif University of Technology ; Bagheri Shouraki, Saeed (Supervisor)
Abstract
Wireless Sensor Networks (WSNs) attracted lots of researchers in recent years, these sensors are small and have limited computational resources and are not expensive in comparision with conventional sensors. These sensors can sense, measure, gathering information from environment and send them to user, they are typically characterized by limited communication capabilities due to tight energy and bandwidth constraints. As a result, WSNs have inspired a resurgence in research on decentralized algorithms, structure of these networks are variable and dynamic, sensors may deleted from the network or added to the network, so using models which don’t require precies specifications of environment is...
Trajectory following of a micro motion stage based on closed-loop FEM simulation
, Article ASME International Mechanical Engineering Congress and Exposition, IMECE 2007, Seattle, WA, 11 November 2007 through 15 November 2007 ; Volume 11 PART A , 2008 , Pages 155-158 ; 079184305X (ISBN); 9780791843055 (ISBN) ; Mahboobi, S. H ; Pirouzpanah, S ; Esteki, H ; Sarkar, S ; Sharif University of Technology
2008
Abstract
Micro motion stages are one of the essential components in field of micro robotics and ultra fine positioning systems. This research presents the optimum design of a 3-DOF micro motion stage and its position control using FEM simulation. This stage to be studied uses a 3 RRR flexure hinge base compliant mechanism driven by three piezoelectric stack actuators to provide micro scale planar motion. First of all parametric modeling of the stage will be fulfilled in ANSYS environment utilizing a commercial piezostack and different types of flexure hinges. Hence the Jacobian matrix will be achieved for each case. The optimum selection of the hinge form will be achieved upon results of the previous...
Ricci-based chaos analysis for roto-translatory motion of a Kelvin-type gyrostat satellite
, Article Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics ; Vol. 228, issue. 1 , 2014 , pp. 34-46 ; ISSN: 14644193 ; Sadati, S. H ; Salarieh, H ; Sharif University of Technology
2014
Abstract
The chaotic dynamics of roto-translatory motion of a triaxial Kelvin-type gyrostat satellite under gravity gradient perturbations is considered. The Hamiltonian approach is used for modelling of the coupled spin-orbit equations of motion. The complex Hamiltonian of the system is reduced via the extended Deprit canonical transformation using the Serret- Andoyer variables. Therefore, this reduction leads to the derivation of the perturbation form of the Hamiltonian that can be used in the Ricci curvature criterion based on the Riemannian manifold geometry for the analysis of chaos phenomenon. The results obtained from Ricci method as well as the values from the Lyapunov exponent demonstrate...
Improving ITIL strategic alignment approach using COBIT framework
, Article Proceedings of the International Conference on Electronic Business (ICEB), 1 December 2010 through 4 December 2010, Shanghai ; 2010 , Pages 490-494 ; 16830040 (ISSN) ; Gardesh, H ; Sikari, S. S ; Sharif University of Technology
2010
Abstract
IT Governance provides a business focus to enable alignment between business and IT objectives at high level COBIT framework and focused on IT operational levels, ITIL standard. COBIT and ITIL are not mutually exclusive and can be combined to provide a powerful IT governance, control and best-practice framework in IT service management. So ITIL business-IT strategic alignment perspective could be improved using COBIT framework. Focusing on COBIT processes which support (primarily and secondarily) strategic alignment, in this paper, first, we map COBIT 4.1 to ITIL v3 to identify how ITIL cover COBIT control objectives. Furthermore, based on control objectives which are not completely...
Nonlinear analysis and attitude control of a gyrostat satellite with chaotic dynamics using discrete-time LQR-OGY
, Article Asian Journal of Control ; 2016 ; 15618625 (ISSN) ; Sadati, S. H ; Salarieh, H ; Sharif University of Technology
Wiley-Blackwell
2016
Abstract
Quasi-periodic and chaotic behavior, along with the control of chaos for a Gyrostat satellite (GS), is investigated in this work. The quaternion-based dynamical model of the GS is first derived, and then the influences of the reaction wheels in the GS structure, under the gravity gradient perturbation that causes a route to chaos through quasi-periodicity mechanism, is investigated. For the suppression of chaos in the system, a chaos control system with the quaternion feedback is designed for the GS based on the extension of the Ott-Grebogi-Yorke (OGY) method using the linearization of the Poincaré map. In the extended OGY controller, the Poincaré map is estimated using the Least Square...
Experimental identification of closely spaced modes using NExT-ERA
, Article Journal of Sound and Vibration ; Volume 412 , 2018 , Pages 116-129 ; 0022460X (ISSN) ; Momeni Massouleh, S. H ; Hajirezayi, S ; Bahai, H ; Sharif University of Technology
Academic Press
2018
Abstract
This article presents a study on the capability of the time domain OMA method, NExT-ERA, to identify closely spaced structural dynamic modes. A survey in the literature reveals that few experimental studies have been conducted on the effectiveness of the NExT-ERA methodology in case of closely spaced modes specifically. In this paper we present the formulation for NExT-ERA. This formulation is then implemented in an algorithm and a code, developed in house to identify the modal parameters of different systems using their generated time history data. Some numerical models are firstly investigated to validate the code. Two different case studies involving a plate with closely spaced modes and...
Trajectory following of a micro motion stage based on closedloop fem simulation
, Article ASME 2007 International Mechanical Engineering Congress and Exposition, IMECE 2007, 11 November 2007 through 15 November 2007 ; Volume 11 , 2007 , Pages 155-158 ; 079184305X (ISBN) ; Mahboobi, S. H ; Pirouzpanah, S ; Esteki, H ; Sarkar, S ; ASME ; Sharif University of Technology
American Society of Mechanical Engineers (ASME)
2007
Abstract
Micro motion stages are one of the essential components in field of micro robotics and ultra fine positioning systems. This research presents the optimum design of a 3-DOF micro motion stage and its position control using FEM simulation. This stage to be studied uses a 3 RRR flexure hinge base compliant mechanism driven by three piezoelectric stack actuators to provide micro scale planar motion. First of all parametric modeling of the stage will be fulfilled in ANSYS environment utilizing a commercial piezostack and different types of flexure hinges. Hence the Jacobian matrix will be achieved for each case. The optimum selection of the hinge form will be achieved upon results of the previous...
Iterative histogram matching algorithm for chromosome image enhancement based on statistical moments
, Article Proceedings - International Symposium on Biomedical Imaging ; 2012 , Pages 214-217 ; 19457928 (ISSN) ; 9781457718588 (ISBN) ; Mousavi, H. S ; Khalaj, B. H ; Sharif University of Technology
IEEE
2012
Abstract
Vivid banding pattern of the chromosome image is a crucial part for diagnosis in karyotype medical test. Furthermore, thriving computer aided segmentation and classification depend on the initial image quality. In this paper, we propose an adaptive and iterative histogram matching algorithm for chromosome contrast enhancement especially in banding patterns which is one of the most important information laid in chromosome image. Objective histogram, with which the initial image needs to be matched, is created based on processes on the initial image histogram. Calculation of statistical moments of image histogram and determination of parameters in each step of iteration based on these moments...
Chromosome image contrast enhancement using adaptive, iterative histogram matching
, Article 2011 7th Iranian Conference on Machine Vision and Image Processing, MVIP 2011 - Proceedings, 16 November 2011 through 17 November 2011 ; 2011 ; 9781457715358 (ISBN) ; Mousavi, H. S ; Khalaj, B. H ; Sharif University of Technology
2011
Abstract
Vivid banding patterns in medical images of chromosomes are a vital feature for karyotyping and chromosome classification. The chromosome image quality may be degraded by many phenomenon such as staining, sample defectness and imaging conditions. Thus, an image enhancement processing algorithm is needed before classification of chromosomes. In this paper, we propose an adaptive and iterative histogram matching (AIHM) algorithm for chromosome contrast enhancement especially in banding patterns. The reference histogram, with which the initial image needs to be matched, is created based on some processes on the initial image histogram. Usage of raw information in the histogram of initial image...
Energy saving in HVAC systems using nanofluid
, Article Applied Thermal Engineering ; Volume 31, Issue 8-9 , 2011 , Pages 1543-1545 ; 13594311 (ISSN) ; Soltanieh, M ; Noie, S. H ; Saidi, S. H ; Sharif University of Technology
2011
Abstract
The present study tries to use the methanol-silver nanofluid filled thermosyphon heat exchanger and compares the effectiveness as well as energy saving with pure methanol. Experimental results show that using methanol-silver nanofluid, leads to energy saving around 8.8-31.5% for cooling and 18-100% for reheating the supply air stream in an air conditioning system
The large-scale dynamic maximal covering location problem
, Article Mathematical and Computer Modelling ; Volume 57, Issue 3-4 , February , 2013 , Pages 710-719 ; 08957177 (ISSN) ; Davari, S ; Sisakht, S. A. H ; Sharif University of Technology
2013
Abstract
Most of the publications regarding the maxim covering location problem (MCLP) address the case where the decision is to be made for one period. In this paper, we deal with a rather untouched version of MCLP which is called dynamic MCLP (DMCLP). In order to solve this problem, a simulated annealing (SA) has been presented. The proposed solution algorithm is capable of solving problems with up to 2500 demand nodes and 200 potential facilities with a fair amount of exactness. Our experiments showed that the proposed approach finds solutions with errors less than one percent