Căutare Scientific papers - Annals of "Dunarea de Jos" University of Galati - Analele științifice ale Universității "Dunărea de Jos" din Galați după Titlu

Afișează articolele 1816-1835 of 1845

    • Vague Criteria Relational Database Queries 

      Tudorie, Cornelia ("Dunarea de Jos" University of Galati, 2003)
      The most accessible interfaces querying relational database should allow vague terms included in selection criteria. The gradual property stands for the simplest vague selection criterion, but more categories of vague ...

    • Values of the Solutal Marangoni Number in Very Dilute Fe-C-O Solutions at 1873K 

      Niță, Petre Stelian (Universitatea "Dunărea de Jos" din Galați, 2007)
      Low carbon, aluminum killed steels are well represented by the adequate part of the Fe-C-O system, where are available useful experimental data, regarding the surface tension and viscosity. The reference dynamic ...

    • Vaporisation of the Metallic Bath Component During Refining in Oxygen Converter 

      Ivănescu, Lilica; Ivănescu, Alexandru; Vasilescu, Elisabeta (Universitatea "Dunărea de Jos" din Galați, 2008)
      The paper presents a series of researches regarding the vaporization of the component elements of the metallic bath and slag during refining in LD converter. Also, the main factors which influence the vaporization process ...

    • VAR Methodology in Assessment of the Financial Stability 

      Isac, Bors (“Dunarea de Jos” University of Galati, 2015)
      Projecting a new operational framework designed to ensure the implementation of macroprudential policy in order to ensure financial stability, it should start from developing the capacity of identifying and measuring the ...

    • Variation of Mechanical Characteristics for Thin Wall Tubes Processed in Ultrasonic Field 

      Susan, Mihai; Achiței, Cristian; Ștefanică, Roxana Gabriela; Gavrilă, Bogdan Lucian (Universitatea "Dunărea de Jos" din Galați, 2009)
      The paper presents the variation of mechanical characteristics of resistance and plasticity for thin wall tubes made of stainless steel 10TiNiCr180, processed in ultrasonic field. Decrease of mechanical characteristics ...

    • Vector Space Model for Document Representation in Information Retrieval 

      Munteanu, Dan ("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, ...

    • Vegetal Oils as Lubricating Materials 

      Calomir, Camelia; Ștefănescu, Ioan; Chiriță, George (Universitatea ”Dunărea de Jos” din Galați, 2008)
      The success of vegetal oils is related to their biodegradability and reduced toxicity but a wide use is limited by their insufficient stability in time. Biodegradable oils have ecological advantages, being comparable or ...

    • Vibration Diagnosis Systems for a Cold Rolling Mill Machine 

      Dragomir, Ștefan; Măcuță, Silviu; Spânu, Constantin (Universitatea "Dunărea de Jos" din Galați, 2007)
      In this work is shown the importance to use a monitoring by vibration system for a cold rolling mill machine. The using of this monitoring vibration system reduce maintenance costs, minimize the impact on operation because ...

    • Vibration Measurement Equipment 

      Grigorescu, Luiza (Universitatea "Dunărea de Jos" din Galați, 2006)
      This paper describes the principles of operation of typical instrumentation used in the measurement of shock and vibration. It deals with the measurement of parameters which characterize the total (broad-band) signal.

    • Vibrations and Torque Monitoring Processes for a Cold Rolling Mill 

      Dragomir, Ştefan; Diaconu, Nicolae; Bordei, Marian (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      This paper presents researches made on a system of monitoring and other parallel systems for diagnose used in a cold rolling mill. The first system (with specific measurement sensors) is an online vibration monitoring ...

    • Virtual Prototype for Simulation and Analysis of Traction Systems in Interaction with Roads 

      Axinti, Adrian-Sorin; Năstac, Silviu-Marian; Gavril, Axinti (Universitatea "Dunărea de Jos" dn Galați, 2008)
      This study deals with numerical simulation of an equipment with full hydrostatic driving system. Based on the clasical mathematical models - single degree of freedom and two degree of freedom models, it was developed a ...

    • Viscosity of Amorphous Molecular Substances 

      Diaconescu, Emanuel; Zegrean, Vlad Flaviu; Onciul Miron, Oana (Universitatea ”Dunărea de Jos” din Galați, 2008)
      Because the great majority of flow units in a liquid behave instantaneously in a solid-like manner, rheological properties of molecular liquids subjected to high pressures may be measured by using corresponding molecular ...

    • Voltage Control Scheme for Three Phase SVM Inverter Fed Induction Motor Drive Systems 

      Sowmmiya, U.; Jamuna, V. ("Dunarea de Jos" University of Galati, 2010)
      This paper presents an efficient implementation scheme for the closed-loop voltage control of an induction motor incorporating ‘Space Vector Pulse Width Modulation (SVPWM)’. Voltage control is required to meet the variation ...

    • Vulnerability of Senegal’s South Coast: Perspectives with the Climate Change’s Context 

      Ndiaye, Cheikhou Oumar; Kane, Alioune; Pușcașu, Violeta (Editura Europlus Galaţi, 2011-02)

    • Waste Minimization by Reuse and Recycling 

      Negoiță, Daniela L.; Ion, Ion V. (Universitatea "Dunărea de Jos" din Galați, 2009)
      Recently, pollution prevention directs attention towards the elimination or reduction of undesired by- products within the production process itself before treatment. On the long term, pollution prevention through waste ...

    • Water-in-Diesel Emulsions as Alternative Fuel for Diesel engines part I: Water-inDiesel Emulsions. A Literature Review 

      Vrabie, Vlad; Scarpete, Dan; Chioșa, Bianca Elena (Universitate "Dunărea de Jos" din Galați, 2015)
      Although emulsions have found numerous and various applications in chemical, pharmaceutical and food industries, emulsions of water in diesel fuel are applicable alternative fuels for the existing diesel engines. Wate ...

    • Water-in-Diesel Emulsions as an Alternative Fuel for Diesel Engines. Part II: Performance of Diesel Engines Fueled with Water-in-Diesel Emulsions. A Literature Review 

      Vrabie, Vlad; Scarpete, Dan; Chiosa, Bianca Elena (Universitatea "Dunărea de Jos" din Galați, 2015)
      This paper presents the recent advances of water-in-diesel emulsion fuel studies, especially the impact of using this emulsion fuel to the performance and emissions of diesel engine. Studies revealed that the onset and ...

    • Wear and Irreversible Entropy Generation in Dry Sliding 

      Abdel-Aal, Hisham A. (Universitatea "Dunărea de Jos" din Galaţi, 2006)
      This paper examines the relationship between wear and the generation of entropy within the mechanically affected zone, MAZ, of a sliding material. It is postulated that wear is related to irreversible entropy generation ...

    • Wear Behavior of Carburizing on Powder Metallurgy Alloys 

      Marin, Mihaela; Potecașu, Florentina; Alexandru, Petrică; Potecașu, Octavian; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2014)
      In this paper is studied the influence of wear behavior of carburizing in fluidized-bed on sintered alloys produced by powder metallurgy route. In powder metallurgy, carburization is a thermochemically treatment that ...

    • Wear Behaviour of the AL7175 Alloy under Different Bulk Stress States 

      Buciumeanu, Mihaela; Miranda, A.S; Silva, F.S (Universitatea ”Dunărea de Jos” din Galați, 2008)
      In what concerns the stresses involved in the process, most wear tests (namely those in the pin on disc and the pin on plate configurations) are usually solely concerned with the stress state in the contact originated by ...