Căutare 1995-2015 după Data publicării
Afișează articolele 141-160 of 326
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Coandă Effect Used to Improve the Efficiency of a Rotary Wing Aircraft
(Universitatea "Dunărea de Jos" din Galați, 2010)Coandă effect is a well-known fluid mechanics phenomenon in which a jet flow attaches itself to a nearby surface and remains attached even when the surface bends away from the initial jet direction and the jet is deflected ... -
A Study of Body Posture on Human Comfort Under the Influence of Whole-Body Vibrations for the Rail Passengers
(Universitatea "Dunărea de Jos" din Galați, 2010)When traveling by train, passengers are exposed to vibration. A well designed seat will attenuate the vibration path to the person in the frequency region where it is the most perceptible, between 3 and 10 Hz. This paper ... -
Considetations on Using the Virtual Instruments for the Acquisition and Analysis of Experimental Data from Dynamic Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)The new slogan “The software is the tool” takes into consideration a new construction principle for the measuring tools and systems, with a brand new architecture. These systems and tools are assembled into a “virtual ... -
Seismic Protection of Structures Using Hydraulic Damper Devices
(Universitatea "Dunărea de Jos" din Galați, 2010)In recent years, much attention has been paid to the research and development of structural control techniques with particular emphasis on alleviation of wind and seismic responses of structures. Structural control in civil ... -
Muffler Performances Modeling with Boundary Element - Method and Experimental Study
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper investigates the acoustic performance of a reactive silencer using Boundary Element Method analysis and experimental techniques. This analysis addresses a research topic of major interest today on how to reduce ... -
The Influence of Nonlinear the Elastic Character of Viscoelastic Systems on the Dynamic Response of Mechanical Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)Bridges and viaducts represent vital engineering structures which are component of terrestrial communication lines, therefore reducing their exposure to factor originating from natural or anthropogenic hazards has no ... -
Dynamical Response Analysis of a System with one Degree of Freedom Stresses by the Different Pulse Excitation Functions
(Univeritatea "Dunărea de Jos" din Galați, 2010)Viscoelastic systems embedded in structures such as bridges are subject to various dynamic loading from traffic. A dynamic study of these structures requires more accurate definition of disturbance function parameters: ... -
Engineering and Creativity. Romanian Policy Regarding Innovation and Scientific Research Devalopment
(Univerisitatea "Dunărea de Jos " din Galați, 2010)The goal of Lisbon Agenda is to make the EU "the most dynamic and competitive knowledge-based economy in the world, capable of sustainable economic growth improving skiels for more and better jobs and greater social ... -
Noise and Vibration Protective Solution Analysis for Technological Equipments
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper presents a cumulative and comparative analysis, concerning the noise and vibration pollution and protective approaches, monutoring the construction technological equipments. By means of the computer simulations, ... -
A Behavioral Approaach for Competitive Business Process Management
(Universitatea "Dunărea de Jos" din Galați, 2010)Today’s economic context allows corporations and their business environment to produce larger and larger amounts of data relying on the latest information. For the survival in actual complex and unpredictable environment, ... -
On Line Competitiveness Based on Adeptive Control of the Manufacturing System
(Universitatea "Dunărea de Jos" din Galați, 2010)Competitiveness fully and synthetically characterizes the viability of an enterprise. In the economics literature competitiveness is analyzed in particular in economic and managerial terms with almost no insight into the ... -
Experimental Researches on the Sound Absorption Composites Used for Public Worket Equipment
(Universitatea "Dunărea de Jos" din Galați, 2010)Decreasing of sound and vibration global level inside and/or outside the public works equipment’s cabin as well as the reduction the noise pollution or the pollution accounted by the vibration and mechanical shocks on ... -
The Analytical Exact Solutions of Non-Linear Differential Equations Which Describe the Parametric Free Vibrations of Mechanical Systems
(Universitatea "Dunărea de Jos' din Galați, 2010)The movements of many material systems can be described by differential equations that have coefficients that depend on time. It is difficult to determine the solutions of these equations. Although many concrete problems ... -
About Non-Autonomous Vibrations of Mechanical Systems
(Universitatea "Dunărea de Jos" din Galați, 2010)Non-linear vibrations of mechanical systems are described by differential equations of the second order, which are generally written .. . x f ( x, x,t ) 0 . In this work we study non-autonomous vibrations of mechanical ... -
An Evaluative Study of the Competitive Management
(Universitatea "Dunărea de Jos" din Galați, 2010)In this paper, competitiveness, will be understood as the capacity (potential) to provide performance (compared with other similar elements), in a very exact way, within a macroeconomic concrete context and at a certain ... -
About Signals' Spectrum
(Universitatea "Dunărea de Jos" din Galați, 2010)Due to this Fourier series exclusive interpretation applied to periodical signals, which shows that a stationary harmonic signal with a single pulsation cannot contain components of other pulsations but its own pulsation ... -
Considertions on the Mechanical Vibrations of an Electronic Circuit Board
(Universitatea "Dunărea de Jos" din Galați, 2010)The paper analyzes the dynamic stresses induced by mechanical vibrations on an electronic circuit board, considering different study hypotheses, resulting from real cases presented in technical texts. The corresponding models ... -
Modern CAD Tools Used in Mechanical Design
(Universitatea "Dunărea de Jos" din Galați, 2010)This paper aims to present synthetically as many of those tools that are part of Mechanical Desktop 2008 software with notable performance in the CAD environment and to justify this performance by the presentation of the ... -
Filter Signals a First Step in Interpreting Experimental Results
(Universitatea "Dunăread de Jos" din Galați, 2010)After recording and storage of experimental data, a first step in their processing is filtering, ie, removal of parasitic components (noise) accompanying the signal due from other machines or equipment in service or ... -
The Emfi Material and their Use
(Universitatea "Dunărea de jos" din Galați, 2010)ElectroMechanical Film (EMFi) is a thin, plastic material that can be utilized as a sensor and actuator. EMFi is quite new material in the field of ultrasonics and has favorable properties like good matching to air ...