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Feature Selection algorithms based on HTML tags importance

Feature Selection algorithms based on HTML tags importance

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International Conference on Computer engineering and Systems

作者： Amany M. Sarhan Ghada M. Hamissa Heba E. Elbehiry Computer & Automatic Control Dept. Tanta University Egypt Electrical Engineering Dept. KFS University Egypt

Traditionally in Web crawling, the required features are extracted from the whole contents of HTML pages. However, the position which a word is located inside the HTML tags indicates its importance in the web page. This research proposes two ideas concerning the Feature Selection stage in HTML web pages. The first idea reduces the features by simply extracting them from the important tags in an HTML page in order to achieve faster classification. The second idea gives weights for each of the important tags. Two algorithms are presented in this paper based on these ideas: i) Important HTML tags only algorithm, ii) Weighted Important HTML tags only algorithm. The selected features are classified using two famous classifiers in the literature: Support Vector Machine (SVM) and Naïve Bayes classifier (NBC). The accuracy of each algorithm is computed. Comparison between the accuracies of traditional feature selection method, which uses the whole contents of HTML page, and the proposed algorithms is performed. Complete evaluation is performed which indicates the effectiveness of using our technique. The experimental results show improved precision and recall with the proposed algorithms with respect to keyword-based search. The algorithms are implemented in JAVA and its extended packages.

关键词： Web pages HTML Classification algorithms Support vector machines Feature extraction Search engines Crawlers

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Temperature control of a greenhouse heated by renewable energy sources

Temperature control of a greenhouse heated by renewable ener...

引用

International Aegean Conference on Electrical Machines and Power Electronics, ACEMP

作者： Ramona-Oana Grigoriu Alina Voda Nicoleta Arghira Vasile Calofir Sergiu Stelian Iliescu Dept. of Automatic Control and Industrial Informatics University Politehnica of Bucharest (UPB) Bucharest Romania Dept. of Control Systems University Joseph Fourier Grenoble 1 Grenoble France

The paper proposes a system developed to provide heat for a greenhouse using parabolic trough collectors (GHPTC). The GHPTC control system has the goal to maintain the temperature inside the greenhouse at a desired level, with the actuating variable the flow of the conducting fluid through collector pipes. Considering this aspect, the proposed model takes into account as an output variable the internal temperature of the greenhouse as it influences directly the growth of the plants. The GHTPC model consists of two individual parts: the greenhouse model and the collector's model. Both were validated using real data, considering the maxim error between the real and simulated data on a period of one day. A nonlinear and linear model were deducted for the complex GHPTC system. Based on the linearized model, a PID controller was tuned and used to control the internal temperature in the greenhouse. The control method is suited for the system according to the obtained stationary and transient response performances.

关键词： Mathematical model Green products Fluids Biological system modeling Heating Data models

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Accomplish multi-robot tasks via Petri net models

Accomplish multi-robot tasks via Petri net models

引用

IEEE International Conference on Automation Science and engineering (CASE)

作者： Marius Kloetzer Cristian Mahulea Dept. of Automatic Control and Applied Informatics Technical University of Iasi Romania Aragon Institute of Engineering Research (I3A) University of Zaragoza Spain

This paper proposes a method for planning a team of mobile robots such that they accomplish a set of tasks. The environment and the movement capabilities of mobile robots are represented by a Petri net model. Each task is located in a given location and its accomplishment requires a certain number of robots to be present in that place. The order for serving the tasks and firing count vectors for the model result from solving an Integer Linear Programming optimization. Structural properties of the Petri net model allow us to develop an algorithm that produces robot strategies composed from movements, waiting and task serving.

关键词： Mathematical model Petri nets Collision avoidance Mobile robots Optimization Resource management

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Representing externally positive systems through minimal eventually positive realizations

Representing externally positive systems through minimal eve...

引用

IEEE Annual Conference on Decision and control

作者： Claudio Altafini Division of Automatic Control Dept. of Electrical Engineering Linkoping University SE-58183 Sweden

ISBN: (纸本)9781479978878

In order to investigate the cases in which an externally positive discrete-time system fails to have a minimal positive realization, in this paper we introduce the notion of minimal eventually positive realization, for which the state update matrix becomes positive after a certain power. This property captures the idea that in the impulse response of an externally positive system the state of a minimal realization may fail to be positive, but only transiently. It is shown in the paper that whenever a minimal eventually positive realization exists, then the sequence of Markov parameters of the impulse response admits decimated subsequences for which minimal positive realizations exist and can be obtained by downsampling the eventually positive realization.

关键词： IMPULSE RESPONSE Positive minimal realization Minimal time system

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Development of Firewall Optimization Model Using by Packet Filter

Development of Firewall Optimization Model Using by Packet F...

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International Conference on Computer Modeling and Simulation, UKSIM

作者： Myo Thant Kyaw Zaw Ye Kyaw Myat Thu Si Thu Thant Sin Mandalay Division Defence Services Science and Technology Research Center PyiOoLwin Myanmar Department of Informatics and Computer Software System National Research University of Electronic Technology Zelenograd Moscow Russia Department of Automatic Control Systems Bauman Moscow State Technical University Moscow Russia Dept. of Comput. Sci. Nat. Res. Univ. of Electron. Technol. Zelenograd Russia

ISBN: (纸本)9781509008896

This paper studies one particular aspect of providing communication security: firewall technology. This article provides a security framework in the form of packet filtering model within the firewall technology system and its components can be designed and evaluated. This paper introduces a reference model based on packet filtering firewall technology. All components are governed by a centralized security policy and they can be deployed in a distributed fashion to achieve scaling. This packet filtering firewall design is proven technology that provides confidentiality, integrity and availability in own information and network resources. The required design implement to set-up packet filtering firewall for network to protect and unauthorized access to our network. We describe the filtering process design depends on its underlying network technologies. The resulting security mechanism can be used as a bastion-host in the construction of firewall system.

关键词： Computational modeling Filtering Transport protocols Computers informatics Software

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A Matlab-based interactive simulator for mobile robotics

A Matlab-based interactive simulator for mobile robotics

引用

IEEE International Conference on Automation Science and engineering (CASE)

作者： Ramon Gonzalez Cristian Mahulea Marius Kloetzer Aragón Institute of Engineering Research (I3A) University of Zaragoza Spain Dept. of Automatic Control and Applied Informatics Technical University of Iasi Romania

This paper presents an open-source Matlab-based interactive software tool for teaching mobile robotics in introductory courses. In particular, it deals with the subjects: modeling, path planning, and motion control. This simulator offers the advantage of testing different aspects related to these fundamental topics and instantly seeing the result in a Graphical User Interface (GUI). This fact leads to a high realism in interactivity, while no previous knowledge in Matlab or programming is required. Additionally, it constitutes an easily scalable tool, the GUI has been properly designed with just one single window with straightforward and intuitive buttons, icons, and figures. Some illustrative examples demonstrate the benefits of the proposed simulator.

关键词： Mobile robots Trajectory Wheels MATLAB

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Fuzzy control of an anaerobic digestion process

Fuzzy control of an anaerobic digestion process

引用

International Conference on System Theory, control, and Computing (ICSTCC)

作者： Radu-Emil Precup Claudia-Adina Bojan-Dragos Marian Barbu Sergiu Caraman Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania Dept. of Automatic Control and Electrical Engineering “Dunarea de Jos” University of Galati Galati Romania

The paper proposes a simple Takagi-Sugeno PI-fuzzy controller for an anaerobic digestion process. A fifth order nonlinear model of the anaerobic digestion process is first presented. A second order linear model of the process is next proposed, and the parameters of the linear model are obtained from an optimization problem solved by a Gravitational Search Algorithm. A PI controller is designed for the linear process model using a frequency domain approach in terms of imposing the phase margin. The Takagi-Sugeno PI-fuzzy controller is designed on the basis of the linear PI controller. The Takagi-Sugeno PI-fuzzy controller is validated by simulation using the nonlinear process model in the fuzzy control system.

关键词： Mathematical model Process control control systems Fuzzy control Takagi-Sugeno model Modeling Biological system modeling

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An adaptive dynamic inversion-extremum seeking control approach for constrained robotic motion tasks

An adaptive dynamic inversion-extremum seeking control appro...

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European control Conference

作者： Vasiliki Koropouli Azwirman Gusrialdi Dongheui Lee Automatic Control Engineering Technische Universitat Munchen Dept. of Electrical Engineering and Computer Science University of Central Florida

ISBN: (纸本)9781467371605

In this paper, an adaptive control approach is proposed for performance of constrained robot end-effector movements in presence of uncertainty. In real-world scenarios, complex physical phenomena occuring at the place of interaction may introduce nonlinearities in the system dynamics, which have to be taken into account for proper system control. We currently propose an Extremum Seeking (ES) Model Reference Adaptive control (MRAC) approach for state tracking of multiple-input multiple-output systems which enclose nonlinearities in their dynamics and involve parametric uncertainty by employing Adaptive Dynamic Inversion (ADI). According to ADI, system nonlinearities are assumed known and are taken into account in the design of the system control law. The proposed scheme is based on MRAC and ADI while the unknown controller parameters are adapted by ES control. The system is shown to achieve global and asymptotic reference state tracking under the proposed control law by performing Lyapunov and averaging analysis. The approach is evaluated in simulation and in an experimental robot task.

关键词： MIMO Adaptation models Robots Tracking Dynamics Adaptive control Nonlinear dynamical systems

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Teleconference Application for Mobile Surveillace and Telemedicine Systems

Teleconference Application for Mobile Surveillace and Teleme...

引用

International Conference on control Systems and Computer Science (CSCS)

作者： Ciprian Lupu Cosmin-Constantin Mihai Dept. of Automatic Control and Systems' Engineering University Politehnica of Bucharest Bucharest Romania Universitatea din Bucuresti Bucuresti RO

This paper describes the implementation of a surveillance, monitoring and teleconference system used by the TELEDIM telemedicine system. Windows tablets and smart phones are used to capture audio and video data and se... 详细信息

关键词： Servers Streaming media Surveillance Data acquisition Ad hoc networks IEEE 802.11 Standard Program processors

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Optimizing cell decomposition path planning for mobile robots using different metrics

Optimizing cell decomposition path planning for mobile robot...

引用

International Conference on System Theory, control, and Computing (ICSTCC)

作者： Marius Kloetzer Cristian Mahulea Ramon Gonzalez Dept. of Automatic Control and Applied Informatics Technical University of Iasi Romania Aragón Institute for Engineering Research University of Zaragoza Spain Robotic Mobility Group Massachusetts Institute of Technology MA USA

Many robot planning approaches use cell decomposition methods for finding a sequence of regions that the robot should traverse. When a fully-actuated robot is used, the robot reference trajectory is simply constructed by linking through line segments the middle points of common facets of successive traversed cells. This paper improves this approach by proposing three different optimizations that yield the waypoints through which the robot piecewise linear route is passing. The optimizations use different metrics defined as sums of norms for the linear segments that compose the route. The norms L 1 , L 2 squared and L ∞ are used and standard optimization problems result in each case. Examples are included for showing the usefulness of these optimizations, since shorter routes can be obtained under a negligible computational overhead.

关键词： Robots Optimization Trajectory Measurement Planning Standards

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