Scientific papers - Annals of "Dunarea de Jos" University of Galati - Analele științifice ale Universității "Dunărea de Jos" din Galați: Recent submissions
Afișează articolele 1241-1260 of 1845
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A RLS Model Extracted by ICA
("Dunarea de Jos" University of Galati, 2007)This paper presents some preliminary results regarding the ability of ICA in analyzing spectrometric data. A set of RLS spectra, measured for different concentration DNA solutions, in the presence of the probe TbDTPA, is ... -
Computing Negentropy Based Signatures for Texture Recognition
(2007)The proposed method aims to provide a new tool for texture recognition. For this purpose, a set of texture samples are decomposed by using the FastICA algorithm and characterized by a negentropy based signature. In order ... -
Vector Space Model for Document Representation in Information Retrieval
("Dunarea de Jos" University of Galati, 2007)This paper presents the basics of information retrieval: the vector space model for document representation with Boolean and term weighted models, ranking methods based on the cosine factor and evaluation measures: recall, ... -
A Quick Survey of Text Categorization Algorithms
("Dunarea de Jos" University of Galati, 2007)this paper contains an overview of basic formulations and approaches to text classification. This paper surveys the algorithms used in text categorization: handcrafted rules, decision trees, decision rules, on-line learning, ... -
Knowledge Based Diagnostic System With Probabilistic Approach
("Dunarea de Jos" University of Galati, 2007)This paper presents a knowledge learning diagnostic approach implemented in an educational system. Probabilistic inference is used here to diagnose knowledge understanding level and to reason about probable cause of learner’s ... -
Automatic Modeling of the Linguistic Values for Database Fuzzy Querying
("Dunare de Jos" University of Galati, 2007)In order to evaluate vague queries, each linguistic term is considered according to its fuzzy model. Usually, the linguistic terms are defined as fuzzy sets, during a classical knowledge acquisition off-line process. But ... -
Automatic Modeling of the Linguistic Values for Database Fuzzy Querying
(2007)In order to evaluate vague queries, each linguistic term is considered according to its fuzzy model. Usually, the linguistic terms are defined as fuzzy sets, during a classical knowledge acquisition off-line process. But ... -
A New Approach to E-Commerce Multi-Agent Systems
("Dunarea de Jos" University of Galati, 2007)The negotiation process between two humans is an art. To capture the magic behind negotiation, a first step will be to build a model that incorporates human emotions and community emotional opinions. A model like this will ... -
A Student Model in a Multi-Agent Intelligent System
("Dunarea de Jos" University of Galati, 2007)The paper presents an intelligent tutoring system which provides a Student Model using the “overlay method”. The system’s tasks are distributed among the intelligent agents (software agents), each having clearly specified ... -
The Influence of Non-Homogenous Dielectric Material in the Waveguide Propagation Modes
("Dunarea de Jos" University of Galati, 2006)The aim of this paper is to indicate the equations of electromagnetic wave in homogenous and non-homogenous dielectric material, estabilising the bundary conditions and solves by FEM the equations of the electromagnetic ... -
Power Conditioning System Topology For Grid Integration of Wind and Fuel Cell Energy
("Dunarea de Jos" University of Galati, 2006)This paper shows the topology of the hybrid grid-connected power system and the performances of the front-end three-phase power inverter. The renewable sources of the hybrid power system consist of a solid oxide fuel cell ... -
Non-Conventional Method for Friction Compensation in DC Drive Position Tracking
("Dunarea de Jos" University of Galati, 2006)Friction, especially its nonlinear components, may degrade the tracking performance of any servo drive systems. Focused on high precision positioning of DC electrical drive the paper proposes an easy method to compensate ... -
Stationary Frame Active Power Filter Control Based on Multiresolution Analysis
("Dunarea de Jos" University of Galati, 2006)The paper presents an active power filter control method. The reference signal is generated in the stationary reference frame α-β using multiresolution analysis and the controllers used are P-resonant controllers, suitable ... -
Indirect Control of a Single-Phase Active Power Filter
("Dunarea de Jos" University of Galati, 2006)The control of shunt active power filters using PWM inverters consists in generating a reference by separating, using different methods, the harmonics to be eliminated. The methods used are time-consuming and need dedicated ... -
Some Rezults Concerning No-Storage Wide-Diesel Systems Control
("Dunarea de Jos" University of Galati, 2006)This paper deal with the dynamics of an autonomous no storage wind-diesel system, comprising a diesel generator and a controlled wind system with a hypo/hyper synchronous cascade. The objective is to maximize the wind ... -
Aspects Regarding the Neuro-Adaptive Control Structura Proprieties. Application to the Nonline Pneumatic Servo System Benchmark
("Dunarea de Jos" Universsity of Galati, 2006)Generally, control techniques based on multilayer neural networks are used especially in the case of non-linear process and less in case of linear process, because classical control techniques are good enough and relatively ... -
Identification of the Non-Linear Systems Using Internal Recurrent Neural Networks
("Dunarea de Jos" University of Galati, 2006)In the past years utilization of neural networks took a distinct ampleness because of the following properties: distributed representation of information, capacity of generalization in case of uncontained situation in ... -
Possibilistic Networks for Uncertainy Knowledge Processing in Student Diagnosis
("Dunarea de Jos" University of Galati, 2006)In this paper, a possibilistic network implementation for uncertain knowledge modeling of the diagnostic process is proposed as a means to achieve student diagnosis in intelligent tutoring system. This approach is proposed ... -
Data Mining for Scientific Publications
("Dunarea de Jos" University of Galati, 2006)Searching scientific literature on the Web is a difficult task because of the large volume and the complex dynamics of the scientific literature and because of the complexity and narrow target of typical queries. The problem ... -
On the Potential of Using Fractional-Order Systems to Model the Respiratory Impedance
("Dunarea de Jos" University of Galati, 2006)This contribution provides an analysis of the human respiratory system in frequency domain by means of estimating the respiratory impedance. Further on, analysis of several models for human respiratory impedance is done, ...
