RC


31-73 CERCETĂRI EXPERIMENTALE PRIVITOARE LA DETERMINAREA CONSUMULUI EXTRA-URBAN DE COMBUSTIBIL LA RENAULT KANGOO

experimental researches concerning the extra-urban fuel consumption determination for Renault kangoo

 

The present work realizes an experimental research and analytic study of the fuel efficiency data gained in extra-urban determinations concerning the fuel consumption, vehicle average speed on the road, location and ecologic behaviour, in climate and real-time defined road conditions, with Renault Kangoo from 2007, during the frequently used track in exploitation between Cluj-Napoca and Alba Iulia cities. There was evaluated the carbon foot print and fuel efficiency measured from the initial reference point (in Cluj-Napoca) and also the economic and environmental behaviour based on the fuel supply process in the case of testing on a real-road track. The opportunity of the present research paper is given by the fact that vehicle economy and environmental behaviour during extra-urban driving operation have a significant influence on carbon impact when engaging in high speeds.

 

Keywords: consumption, fuel, extra-urban, Kangoo, Renault

Cuvinte cheie: consum, combustibil,  extra-urban, Kangoo, Renault

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31-72 STUDIUL INFLUENȚEI UNOR FACTORI CONSTRUCTIV-FUNCȚIONALI ASUPRA CALITĂȚII PORNIRII, ARDERII ȘI GENEZEI EMISIILOR MOTORULUI 1.7 CDI DE LA MERCEDES VANEO

Study of the influence of manufature and operational factors upon the quality of engine start, combustion and emissions generation of 1.7 CDI engine from MERCEDES VANEO

 

The present paper makes a theoretical and applied study of the components and entire engine starting and preheating system from diesel 1.7 CDI Mercedes Vaneo engine in relation with glow plugs, air filter, engine behaviour and smoke particles generation, in various cold-starting conditions and procedures, with diagnosis equipment connected to the electric and electronic management system. There is pointed out the preheating system for diesel engine with special glow plugs for air temperature increase before the fuel injection supply in the combustion chamber. These aspects have a significant influence upon the pollutant emissions production and development. Lowering the pre-combustion temperatures in the cylinder negatively influences the compression ignition process by dissipating the heat level. The opportunity for studying the pre-heating system of the Vaneo engine comes from the frequency of such a malfunction in compression ignited engines during winter cold-start.

 

Keywords: combustion, diesel, hydrocabrons, Mercedes, Vaneo

Cuvinte cheie: aprindere, diesel,  hidrocarburi, Mercedes, Vaneo

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31-71 CERCETAREA EXPERIMENTALĂ A SISTEMULUI DE MANAGEMENT DE LA AUTOVEHICULUL SUV PEUGEOT 4007

experimental research of the management system FROM the Peugeot 4007

Sport utility vehicle

 

The scientific paper points out an applied approach of the actual values recorded from the engine management system. Some parameters were analyzed, related to fuel consumption, engine speed, accelerator pedal position sensor, fuel temperature, coolant temperature and intake air temperature in specific operating conditions and accelerator pedal positions, with sport utility vehicle Peugeot 4007 during the transient stage operation.

There are very few explicit researches concerning the consumption and performance in real operating situation of the Peugeot 4007.

Today are many SUVs on the streets of our nation and in EU, but there is a little interest concerning their fuel economy and environmental impact. The engine coolant and fuel temperature, besides the engine speed and accelerator pedal position have a significant influence on the engine’s economy and carbon foot-print. In this applied engineering work it is researched the fuel consumption of the engine when operating the Peugeot 4007 SUV in order to point out the influence between the accelerator in driver’s cabin, engine’ speed, other systems, fuel economy and environmental impact. The recorded data are close inspected and post-processed.

 

Keywords: Combustion, Fuel, Injection, SUV, Peugeot, 4007

Cuvinte cheie: Ardere, Combustibil, Injecție, SUV, Peugeot, 4007

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31-70 CONTRIBUȚII LA CERCETAREA EXPERIMENTALĂ A PARAMETRILOR SISTEMULUI DE ALIMENTARE PRIN INJECȚIE DE LA MOTORUL 3.0i AL AUTOMOBILULUI BMW X5

contributions to the EXPERIMENTAL RESEARCH OF INJECTION FUEL SUPPLY SYSTEM FROM 3.0i ENGINE OF BMW X 5 ROAD VEHICLES

 

This scientific article shows the results of multiple experimental tests and researches made on the basis of fuel injection process during different operating regimes. Measured parameters are in this case engine speed, fuel consumption, injection timing and engine temperature.

The main objective of these tests is to determine how fuel consumption is influenced by engine speed and engine coolant temperature if the vehicle is operating in neutral gear that means the engine has no load on the crankshaft. In this case the engine speed will be correlated with the accelerating pedal position. The road vehicle on which the tests will be conducted is BMW X5 3.0i model years 2002. There aren’t any detailed studies made on this model. It is a well-known that a considerable number of such vehicles are registered in our country. Besides this body type, BMW Factory equipped other vehicles with this engine.

The experimental tests offer engineers a better understanding of injection process and fuel economy in the case of conventional fuel supply systems. The experimental data are summarized and accurately analyzed and represented.

 

Keywords: automotive, BMW, consumption, engine, injection

Cuvinte-cheie: automobile, BMW, consum, motor, Injecţie

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31-69 ANALIZA FENOMENELOR SEMIOZICE ÎN CAZUL SISTEMULUI ELECTRONIC DE CONTROL A MOTORULUI CU APRINDERE PRIN SCÂNTEIE DE LA OPEL ASTRA F

The analyze of semiosis phenomena in the case of electronic control system of the spark ignited engine from opel astra f

 

The present paper shows a detailed analysis of semioses phenomena for modern spark engines with electronic processing components installed in order to improve engine control, by generating a diagnosing protocol of the power-train in operation. It points out the specific field of electronics measuring methods (with modern micro-processor components) developed for spark ignited engines, specifically the ones with single point injection in the present case. There is known that the sensors and actuators operation besides the electronic control unit have a major influence upon the operational process and also on the engine reliability and economy. Studying and testing the electronic control systems on spark ignited engines may lead to a different engineering measures and improvement strategies in order to optimize the power-train performance and fuel economy, while the vehicle’s dynamic will be accurately controlled. Today in the field of computer-science and technology diagnosing process and procedures are very important in order to gain the most performance and functionality out of a component or a system. The present article presents the issue of experimentally evaluating electronic control system and improving the operation with significant changes and measurements on the parameters which must comply with the manufacturer’s prescription of system performance.

 

Keywords: automotive, electronics, injection, simptoms, spark

Cuvinte cheie: automobilistic, electronică,  injecție, simptome, scânteie

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31-68 STUDIUL ASPECTELOR SEMIOLOGICE PRIVIND HIDRAULICA SISTEMULUI DE INJECȚIE ÎN DIAGNOSTICAREA MOTORULUI 1.8 TDCI DE LA FORD FOCUS

Study of the semiologic aspects concerning the hidraulics of the injection system in diagnosing 1.8 TDCI engine from Ford Focus

 

The present paper develops an applied study of the diagnosing aspects of the injection system behaviour and component analyse as well as engine management parameters, injection quantity, fuel temperature and non-operational behaviour, in different testing situations, with engine scanning equipment connected to the electronic control module via on board connection. Here are highlighted the injection system and the injector for diesel fuel supply of the Ford Focus engine (1.8 TDCi Turnier/DNW/85.0 kW).

 

Importance for testing the injection system of the Ford Focus engine comes from the numerous vehicles that manifest the symptoms of misfiring, engine-stop, and other problems in operation. The development of present paper aims toward the goal of outlining the problem related to the fuel supply system and injectors of the compression ignited engine in some specific testing situations.

 

Keywords: diesel, Focus, Ford, fuel, injection

Cuvinte cheie: diesel, Focus, Ford, combustibil, injecție

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31-67 CERCETAREA REPREZENTĂRII LA BORD A INFORMAȚIILOR ESENȚIALE PRIVITOARE LA CONDIȚIILE TEHNICE ÎN FUNCȚIONARE ȘI ECONOMICITATEA UNUI AUTOVEHICUL ÎN EXPLOATARE

Researching on-board display of esential informations concerning technical conditions

in operation and fuel-economy

of a motor-vehicle in operation

 

The scientific paper realizes an applied research of the specifications and data available in graphic representation systems on-board in passenger compartment of the modern motor-vehicles. Analyzing the state of the art technologies available on the most advanced and up to date automotive products on the streets in order to better understand the evolution from what there was ten or fifteen years ago to what will be materialized in the near future allows the designer and the young researchers to improve their knowledge on the specific field. Importance for studying the on-board graphics consists in knowing how information versatility and availability is useful for the driver and passenger during the trip.

 

Keywords: Benz, economy, graphics, Mercedes, panel-display

Cuvinte cheie: Benz, economie, grafice, Mercedes, panou-afișaj

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31-66 OPTIMIZAREA RUTEI AUTOVEHICULELOR FOLOSITE LA TRANSPORTUL DE BALAST IN SCOPUL REDUCERII CONSUMULUI DE COMBUSTIBIL

ROUTE OPTIMIZATION FOR VEHICLES USED TO TRANSPORT BALLAST TO REDUCE FUEL CONSUMPTION

 

Fuel consumption has become a growing problem for transport companies especially by the fact that the acquisition cost of fuel increased, transport distances were increased and the quality of roads degrades from year to year. This paper analyses the fuel consumption of the sorting station on the route to the excavation, and based on results obtained is proposed reconfiguration of the route, which will reduce the distance between the two points of interest and therefore fuel consumption.

 

Keywords: route optimization, fuel consumption

Cuvinte cheie: traseu, optimizare, consum de combustibil

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31-65 ANALIZA ÎMBUNĂTĂȚIRII CONSUMULUI DE COMBUSTIBIL A UNUI MAI PRIN DEZACTIVARE DE CILINDRI

Fuel consumption improvement of an IC

engine by cylinder deactivation

 

The paper aims to analyse the fuel consumption gain of an IC engine equipped with cylinder deactivation technology, through software simulations. Data sets obtained with AVL BOOST simulation software were introduced in AVL CRUISE to run a NEDC cycle to demonstrate the feasibility of cylinder deactivation technology. Simulations were run separately for the urban cycle and then for extra-urban cycle to see what is the technology best suited for.

 

Keywords: fuel consumption, cylinder deactivation, simulation

Cuvinte cheie: consum combustibil, dezactivare de cilindri, simulare

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31-64 CERCETAREA PARAMETRILOR SISTEMULUI DE SUPRAALIMENTARE A MOTOARELOR CU APRINDERE PRIN COMPRIMARE

research of SUPERCHARGHING SYSTEM parameters FOR COMPRESSION IGNITION ENGINES

 

This study explains the parameters that influence supercharging system operation. This parameters were obtained from practical activity, when with a diagnostic system were identifies and analyzed some sizes such as: engine speed, acceleration pedal position, air mass, boost pressure actual, boost pressure nominal, boost pressure control duty cycle, intake air temperature, injection quantity actual. The vehicle which was chosen for practical activity is a Audi A4 Avant, because the presented car benefits of a supercharging system which increases engine power. A supercharger system is characterized by the fact that particles of air that entering in the engine is compressed by a compressor and forced introduced into the combustion chamber. Supercharging system from Audi A4 is based on a turbine which is driven by exhaust gas and has attached a shaft through which compressor is actioned. There parameters identified on practical activity interpreted through graphic representation in this way can be observed the evolution of certain sizes.

 

Keywords: Audi, Supercharge, Turbine, Engine

Cuvinte cheie: Audi, Supraalimentare, Turbină,  Motor

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31-63 CONTRIBUȚII LA CERCETAREA EXPERIMENTALĂ A VISCOZITĂȚII ȘI DENSITĂȚII LUBRIFIANTULUI UNUI MOTOR CU APRINDERE PRIN COMPRIMARE DE LA TRACTOR ALIMENTAT CU BIOCOMBUSTIBIL

Contributions to experimental research OF lubricant viscosity and density from tractor compression ignition engine supplied with biofuel

 

The present research paper shows some of the results achieved during practical tests on the compression ignited engine of a mini-tractor for agricultural use.

The developed tests were conducted in order to point out the influence of working time, type of fuel and temperature regime on the main physical properties of the lubricant. There were monitored the viscosity and density of lubricant and of few blends between the lubricant and the supplied fuels. In the research work are also highlighted the main engine components and the test-bed infrastructure in order to facilitate further improvement and development of the procedure.

The necessity and high importance of testing the lubricant main properties, as viscosity and density, at different temperature levels and in various cases of fuel supply methods and substances in the compression ignited engine is based on the ubiquity of biofuel implementation in modern commercial fuels.

 

Keywords: cylinder, friction, lubricant, tribology, viscosity

Cuvinte cheie: cilindru, frecare, lubrifiant, tribologie, viscozitate

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31-62 CALCULUL TERMIC AL MOTORULUI CU APRINDERE PRIN COMPRIMARE ALIMENTAT CU BIODIESEL

CALCULATION OF HEAT ENGINE POWERED WITH COMPRESSION IGNITION BIODIESEL

 

In the work is presented thermal calculation time compression ignition engine fuelled with biodiesel, which will allow tracing and checking the chart indicated the fundamental dimensions of the engine, and the necessity of checking the calculations of resistance of main parts of the motor mechanism.

 

Keywords: diesel fuel, emission of gas, combustibles, gas of escapements, motor – hour, tractor engines, excess air coefficient, residual gas temperature

Cuvinte-cheie: motorină, emisii de gaze, combustibili, gaze de eșapament, moto-oră, motoare de tractor, coeficientul excesului de aer, temperatura gazului rezidual

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31-61 MANAGEMENTUL CERCETĂRII ÎN DOMENIUL MOTOARELOR ALIMENTATE CU BIOCOMBUSTIBILI

RESEARCH MANAGEMENT IN

ENGINES POWERED BY BIOFUELS

 

The bio-fuels know, mainly during the last decade, an accelerating growth. Due to the conventional resources limitation, to the new concepts regarding energy security policy and also to the global agricultural strategies the specialists involved in the field of research management in bio-fuels domain need to respond to different challenges

 

Keywords: biofuel research management, biodiesel

Cuvinte cheie: biocombustibil, managementul cercetării, biodiesel

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31-60 STUDII ȘI CERCETĂRI ALE ASPECTELOR N.V.H. LEGATE DE MODUL DE EXPLOATARE AL AUTOVEHICULELOR RUTIERE

Studies and researches of the N.V.H. aspects concerning exploitation mode of road vehicles

 

This scientific and technical paper outlines the studies made on noise, vibrations and harshness aspects in correlation with exploitation of road vehicles. Professional forums and providers look kindly upon pragmatically oriented science from experimental applications and modules’ content (in specialty disciplines from research zone), being the same case with the characteristics of Noise, Vibration and Harshness (NVH) of vehicles in EU. In this context the content of the present paper and the analysed objects, as well as presenting method and specific phases are aiming to fulfil these particular goals and expectations from scientific and economic community.

 

Keywords: harshness, noise, road, vehicle, vibration

Cuvinte cheie: disconfort, zgomot, rutier, vehicul, vibrații

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31-59 PROIECTAREA ȘI REALIZAREA UNEI SOLUȚII DE MANAGEMENT ȘI MĂSURARE TERMICĂ ÎN PROPULSORUL MAȘINILOR PENTRU TEHNOLOGII INTEGRATE ÎN AGRICULTURA MODERNĂ

designing and realizing a THERMAL MEASUREMENT AND MANAGEMENT SOLUTION in machines power-train FOR MODERN AGRICULTURE EMBEDDED TECHNOLOGIES

 

The present scientific paper develops an experimental research concerning the exhaust system behaviour and temperature analyse as well as a simulation model, fuel consumption, and other parameters in different testing conditions on a laboratory test-bed.

There are highlighted the possibilities of clogging the exhaust system, by introducing a flaps in the exhaust-pipe slot (specially created for this purpose). Importance and opportunity for researching and testing the exhaust system of the Lombardini compression ignited engine comes from the numerous specific applications that manifest the symptoms of clogging, engine-low performance, and other diminished performances in operation.

The main objective of this paper consists in outlining the problem related to the exhaust system clogging and energetic-ecologic-economic performances of the compression ignited engine in laboratory testing situations.

 

Keywords: diesel, exhaust, Lombardini, pollution, tracter

Cuvinte cheie: diesel, eșapament, Lombardini, poluare, tractor

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31-58 ANALIZA UNEI SOLUȚII DE MANAGEMENT TERMIC AL MOTORULUI CA TEHNOLOGIE INTEGRATĂ ÎN AUTOVEHICULUL DE RALIU

analizing a THERMAL MANAGEMENT SOLUTION of engine as EMBEDDED TECHNOLOGy in rally vehicles

 

The present scientific paper develops an applied research of the thermal management aspects in the engine operational behavior and a graphic analyze of the real time measurements. Engine management parameters were recorded during rally competition, as well as injection duty, air temperature and other-operational behavior, in different running situations, with engine monitoring equipment connected to the electronic control unite via wire connection. Here are highlighted the thermal management system and the injector duty cycle, fuel supply and the ignition angle of the motor-sport vehicle (Mitsubishi Lancer in 2011). Importance for testing the engine systems of the Mitsubishi Lancer comes from the numerous rally vehicles that are in such competitions, and interest in understanding them. The development of present work aims toward the goal of outlining the aspects related to the thermal management and fuel supply systems and their relation with ignition control in some specific operating situations.

 

Keywords: automotive, management, motor-sport, rally, thermal

Cuvinte cheie: automobilism, management, motor-sport, raliu, termic

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31-57 CERCETAREA APLICATIVĂ A POSIBILITĂȚII ȘI OPORTUNITĂȚII DEZVOLTĂRII VLOGULUI ÎN DOMENIUL AUTOMOBILISTIC ȘI MECANIC CU SCOPUL OPTIMIZĂRII EXPLOATĂRII RESURSELOR ENERGETICE, FINANCIARE ȘI INTELECTUALE

Applied research of the posSibilities and oportunities in developing the vlog in automotive and mechanics fields with the target of optimizing the exploitation of energetic, financial and intelectual resources

 

Vlogging as a video blog is a more often adopted activity to communicate rapidly information through on-line environment and to reach people all over the world in order to connect them with the events and information. Today using the vlog channels and posted data on-line in video formats it may reduce number of experiments that repeat the same algorithm or procedure, thus saving some of the available resources and great amount of energy.

Using wisely the planetary resources, energy, intellectual property, financing and material may lead to prosperous development of humanity and individuals, in stability and proper environment. In this article it is shown the analytics of a developed vlog in the past few years, and its results on various criteria.

 

Keywords: activity, blog, disemination, posting, vlog

Cuvinte cheie: activitate, blog,  diseminare, publicare, vlog

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31-56 PROIECTAREA ȘI TESTAREA UNUI SISTEM DE CONVERSIE TERMO-HIDRO-ENERGETICĂ A DEȘEURILOR COMBUSTIBILE PENTRU UN IMOBIL DE 200 M2

 

designing and testing a system for THERMAL-hydro-energetic conversion of flamable waste FOR a 200 square meters building

 

The present work develops an applied design of the thermal, hydraulic and fuel storage components of the waste materials energetic-conversion system. Behavior and operational analyze as well as combustion management parameters, fuel quantity, water temperature and problematic behavior, in different testing situations, with temperature scanning equipment connected to the analogic control module via thermostats. Here are outlined the waste combustion system and the primitive method of fuel supply in the case of first design, as well as the possibilities for improvement and automation. Importance for testing the waste energetic conversion system consists in the fact that there are a multitude of flammable waste materials that should be disposed. Garbage waste is so high-level that nowadays humanity does not know what to do with it. The development of present paper aims toward the goal of outlining the problem related to the fuel supply system and the pollution of the first design, as well as to the possibility of installing particle filters and catalyst in order to gain an after-treatment gas-control.

 

Keywords: combustion, energy, fuel, garbage, waste

Cuvinte cheie: combustie, energie, combustibil, gunoaie, deseuri

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31-55 EFICIENȚA UNUI SISTEM TERMO SOLAR ÎN CONTEXTUL ECONOMIC ACTUAL. CAZ PARTICULAR

ECONOMIC EFFICIENCY OF A THERMOSOLAR SYSTEM.

A CASE STUDY

 

Integration costs of a thermal solar system for domestic hot water preparation are a decisive factor regarding the implementation of the system. Integration cost depends on the size, capacity, complexity and the type of the thermal solar system. The payback period is directly influenced by the costs of conventional energy prices. Thus, this paper estimates the economic efficiency or the payback period of a thermal solar system for a household with three persons. The thermal solar system is chosen based on the three-year average monthly water consumption. The payback period is estimated based on the last three year monthly average costs of natural gas consumption.

 

Keywords: thermal solar system, integration costs, economic efficiency, solar thermal collector, solar energy

Cuvinte cheie: sistem termo solar, costuri de instalare, eficiență economică, captator termo solar, energie solară

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31-54 STUDII ȘI CERCETĂRI PRIVITOARE LA VALIDAREA METODELOR ŞI ASIGURAREA CALITĂŢII REZULTATELOR ÎN LABORATORUL DE ÎNCERCĂRI PENTRU ULEIURILE MINERALE ELECTROIZOLANTE

Studies and researches concerning

the methods validation and data

quality check IN TESTing laboratory

for INSULATING mineral oils

 

This applied technical paper shows the strict procedures and specific operation in specialized laboratory for physical-chemical studies, in order to ensure a proper validation method and data quality checking. Specialized authorities on national and international levels are verifying and control the proper functionality of research certified laboratories. Also beneficiaries and consumers are interested in getting all the precise data in the physical-chemical measurements both in heavy and food industry. In this situation the present scientific article makes a presentation of operating methodology and specific aspects which define the work and quality checks in this field.

 

Keywords: analyse, quality, laboratory, oil, methodology, test, technical

Cuvinte cheie: analiză, calitate, laborator, ulei, metode, încercare, tehnic

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31-53 ANALIZA CANTITATIVĂ A SPECTRELOR DE FOTOELECTRONI XPS

QUANTITATIVE ANALYIS OF XPS PHOTOELECTRON SPECTRA

 

The paper addresses some issues regarding the influence of main factors on intensity of XPS peaks, namely photoionization cross-section and inelastic mean free path (IMFP). Also is described the XPS PeakFit software commonly used for quantitative determinations of XPS photoelectron spectra.

 

Keywords: X-ray photoelectron spectroscopy, spectrum, peak intensity

Cuvinte cheie: spectroscopie de fotoelectroni cu raze X, spectru, intensitatea unui peak

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31-52 REALIZAREA UNUI IZOLATOR ELECTRIC DIN MATERIALE COMPOZITE

REALIZATION OF AN ELECTRICALLY INSULATING

DEVICE FROM COMPOSITE MATERIALS

 

The objective of this article is to present the final achievement of an electrical insulator, from composite materials. The composite material was selected after painstaking studies, which they duly designated for that purpose.

 

Keywords: composite materials, electrically insulating devices

Cuvinte cheie: materiale compozite, izolatoare electrice

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31-51 FUZIUNEA IMAGINII PENTRU ÎMBUNĂTĂȚIREA IMAGINILOR MULTISPECTRALE PRIN SATELIT

IMAGE FUSION FOR RESOLUTION IMPROVEMENT

OF MULTISPECTRAL SATELLITE IMAGES

 

This paper presents a comparative study concerning the techniques of image fusion that aim at the improvement of the spatial resolution of multispectral satellite images for remote sensing applications. Three methods are used, Hue-Saturation-Intensity color transform (HSI), Principal Component Analysis (PCA), and Brovey technique. Two datasets of two satellites having different resolution and different resolution ratio are used, LANDSAT7 and IKONOS. The measurement of Trade-Off-Value, which is a measure of the degree of resolution improvement and spectral property preservation, is used to evaluate the given methods. The results have shown the superiority of the Brovey method for the LANDSAT7 dataset and the superiority of HSI for the IKONOS dataset.

 

Keywords: image fusion, remote sensing, Hue-Saturation-Intensity transform (HSI), Principal Component Analysis (PCA), Brovey technique

Cuvinte cheie: fuziune a imaginii, teledetecție, transformare a culorii nuanță-saturație-intensitate transformata (HSI), Analiza componentei principale (PCA), tehnica Brovey

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31-50 CAMERELE DE TERMOVIZIUNE, APARATE DE MĂSURĂ UTILE ÎN INGINERIE

THERMAL IMAGERS, USEFUL MEASUREMENT

DEVICES IN ENGINEERING

 

The paper presents an analysis of thermal imagers used in different fields of industries. Thermal imagers are used in almost all industries, and can be used in laboratory applications, because of their advantages: measurement without contact, the visible and thermal images saving and transferring to a personal computer, measuring without interrupting technological process, comparing the visible image with the thermal image. Thermal imagers can be used to maintenance, debugging, and control of equipment and installations.

 

Keywords: thermal imagers, power engineering, electronics

Cuvinte cheie: camere de termoviziune, electroenergetică, electronică

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31-49 VOLTMETRU DIGITAL – COMPONENTA SOFTWARE

Digital VOLTMETER – SOFTWARE COMPONENT

 

This work paper treats software component of the digital voltmeter application under Multisim environment simulation. The software part is wrote in C programming language for the microcontroller apps. The whole code is original and was wrote by authors.

 

Keywords: microcontroller, register, convertion, source code

Cuvinte cheie: microcontroler, registru, conversie, cod sursă

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31-48 VOLTMETRU DIGITAL – COMPONENTA HARDWARE

DIGITAL VOLTMETER – HARDWARE COMPONENT

 

In this work paper we will treat the hardware component of the digital voltmeter simulated under Multisim environment. This application consists into ensamble performed between an I8051 microcontroller, an analog to digital converter and a LCD display on that we will drawing some text about voltage magnitude from the input of the system.

 

Keywords: microcontroller, LCD screen, converter, signal

Cuvinte cheie: microcontroler, ecran LCD, convertor, semnal

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31-47 VOLTMETRU DIGITAL SIMULAT SUB MEDIUL MULTISIM

SIMULATED DIGITAL VOLTMETER

UNDER MULTISIM ENVIRONMENT

 

This work paper presents modeling techniques and designing of the one electronic digital voltmeter under Multisim environment. The program application builds around the 8051 microcontroller and in the follows work papers we will do references to hardware and software structures.

 

Keywords: microcontroller, simulation, digital, code, voltmeter

Cuvinte cheie: microcontroler, simulare, digital, cod, voltmetru

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31-46 ANALIZA UNOR SISTEME CLASICE DE TELEMĂSURARE A NIVELULUI LICHIDELOR. SISTEME PLUTITOR-POTENȚIOMETRU CIRCULAR ȘI PLUTITOR- SELSINE – Partea a II-a

FOR LIQUID LEVEL. FLOATING-POTENTIOMETER AND FLOATING-SELSINS SYSTEMS – Part II

 

The paper presents an analysis of four classic telemetry systems for level measurement, i.e.: for three such systems with float and counterweight, such as those with D.C. pulses, with potentiometer and a D.C. voltmeter, and two identical selsins, one transmitter and one receiver, and a resistive transducer system and logo meter level indicator, which is only used for liquids that have low resistivity. At the last system, it was made a study about linearized conversion, liquid level in the angular displacement of the indicator.

 

Keywords: float level sensor, transducer resistive level gauge logometru, synchro

Cuvinte cheie: traductor de nivel cu plutitor, traductor rezistiv de nivel, logometru indicator de nivel, selsin

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31-45 ANALIZA UNOR SISTEME CLASICE DE TELEMĂSURARE A NIVELULUI LICHIDELOR. SISTEME CU IMPULSURI DE C.C. ȘI CU LOGOMETRU DE NIVEL Partea I-a

ANALYSIS ON CLASSIC TELEMETRY SYSTEMS USED FOR LIQUID LEVEL. D.C. PULSES SYSTEMS AND LEVEL LOGOMETER – Part I

 

The paper presents an analysis of four classic telemetry systems for level measurement, i.e.: for three such systems with floating and counterweight, such as those with D.C. pulses, with potentiometer and a D.C. voltmeter, and two identical selsins, one transmitter and one receiver, and a resistive transducer system and logo meter level indicator, which is only used for liquids that have low resistivity. At the last system, it was made a study about linearized conversion, for liquid level in the angular displacement of the indicator.

 

Keywords: float level sensor, transducer resistive level gauge logometru, synchro

Cuvinte cheie: traductor de nivel cu plutitor, traductor rezistiv de nivel, logometru indicator de nivel, selsin

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31-44 CONFIGURAŢIA ŞI COSTUL UNUI TABLOU ELECTRIC PENTRU O INSTALAŢIE DE PANOURI FOTOVOLTAICE ÎN REŢEA

THE ARCHITECTURE AND THE COST OF AN ELECTRICAL PANEL FOR A PHOTOVOLTAIC NETWORK SYSTEM

 

The design and execution of the afferent electrical panel in the electrical system intended for the photo-voltaic panels, the on grid system in the network, implies a great responsibility towards the recipient and for the safety in exploitation of the system. Therewith its architecture is configured depending on the installed power of the electrical energy-producing system of photo-voltaic panels.

 

Keywords: electric panel, electrical installations, photovoltaic panel

Cuvinte cheie: tablou electric, instalaţie electrică, panou fotovoltaic

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31-43 INTERFAȚĂ ”C-MATLAB-SIMULINK” PENTRU GENERARE AUTOMATĂ GRAFICĂ A CARACTERISTICILOR MAȘINII DE INDUCȚIE OPTIMIZATĂ CU PROGRAMUL ”IND”

C INTERFACE-MATLAB-SIMULINK „FOR AUTOMATIC GENERATION OF OPTIMIZED INDUCTION MACHINE’S CHARACTERISTICS WITH THE” IND” SOFTWARE

 

In knowledge, modeling, simulation and numerical solving of the transitory regimes from the operation of the induction machine, becomes necessary, useful and appropriate to develop specialized algorithms of calculation and versatile software interfaces, with low response time and resource-consuming IT. We achieved a C interface-MATLAB callable standalone, or integrated, for plotting the characteristics. The interface allows the interconnection, if necessary, with other FORTRAN modules, SIMULINK, FEMM.

 

Keywords: C-MATLAB-Simulink induction machine, software, graphics

Cuvinte cheie: C-MATLAB-Simulink, mașină de inducție, software, grafică

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31-42 INTERFAȚĂ ”C-MATLAB-SIMULINK” PENTRU SOLUȚIONAREA UNOR REGIMURI TRANZITORII LA MAȘINA DE INDUCȚIE, CU GENERARE AUTOMATĂ GRAFICĂ A CARACTERISTICILOR

C-MATLAB-SIMULINK INTERFACE FOR SOLVING OF

SOME TRANSITORY REGIMES AT THE INDUCTION MACHINE WITH AUTOMATIC GENERATION

OF GRAPHICAL CHARACTERISTICS

 

In knowledge, modelling, simulation and numerical solving of the transitory regimes from the operation of the induction machine, becomes necessary, useful and appropriate to develop specialized algorithms of calculation and versatile software interfaces, with low response time and resource-consuming IT. We achieved a C interface-MATLAB callable standalone, or integrated, for plotting the characteristics. The interface allows the interconnection, if necessary, with other FORTRAN modules, SIMULINK, FEMM.

Keywords: C-MATLAB-Simulink induction machine, software, graphics

Cuvinte cheie: C-MATLAB-Simulink, mașină de inducție, software, grafică

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31-41 ANALIZA EFECTULUI CORONA ÎN REGIM TRANZITORIU DE SUPRATENSIUNE

CORONA EFFECT IN TRANSIENT REGIME OF OVERVOLTAGES

 

The paper treats the quantitative and qualitative influence of Corona discharge on waveform in transient regime of over voltages propagation on electric aerial lines. The theoretical consideration given in the paper was compare with some measurements on real distribution line and results a satisfactory validity.

 

Keywords: Corona, overvoltage transient

Cuvinte cheie: efect Corona, supratensiuni, regim tranzitoriu

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31-40 ANALIZA CU ELEMENTE FINITE TRIDIMENSIONALE A MAŞINII SINCRONE HOMO-HETEROPOLARE UTILIZATĂ CA GENERATOR ÎN APLICAŢII EOLIENE SAU LA MICROHIDROCENTRALE

3D FEM VALIDATION OF HOMO-HETEROPOLAR SYNCHRONOUS MACHINE FOR WIND OR HYDRO APPLICATIONS

 

In an effort to introduce a low cost (PM less), low power electric wind or hydro generators, this paper reports on preliminary design aspects, 3D FEM analysis of a 2.5 KVA, 250-1000 rpm, reactive homo-heteropolar brushless synchronous machine (RHHBSM).

 

Keywords: three-dimensional finite element analysis, homo-heteropolar synchronous machine rotating excitation stator applications reduced wind power, small hydro

 

Cuvinte cheie: analiza cu element finit tridimensională, maşină sincronă homo-heteropolară rotativă, excitaţie statorică, aplicaţii eoliene de putere redusă, microhidrocentrale

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31-39 STUDII ȘI CERCETĂRI ALE TENDINȚELOR DE INVESTIȚIE ECONOMICĂ ȘI CONVERSIE A ENERGIEI PE PLAN INTERN ȘI INTERNAȚIONAL

Studies and researches of the tendencies in economic investments and energy conversion

on national and international level

 

This scientific paper outlines the statistical data and studies made on energy (production and consumption), economical aspects and investment traces in correlation with the national and international entities. Professional forums and consumers look interested sometimes upon pragmatically oriented energy studies. They are interested about energy applications and its sources of production, since its costs and health impact is tightly correlated with it. In this context the data in the present scientific article and the analysed statistics, as well as the representing methodology and specific aspects are directed to match these expectations from general population, as well as the scientific and economic community.

 

Keywords: energy, economy, hydro, investment, power

Cuvinte cheie: energie, economie, hidro, investiție, putere

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31-38 DETERMINAREA VALORII OPTIME A PĂTURII DE CURENT PENTRU GENERATOARE SINCRONE

DETERMINING THE OPTIMAL LINIAR CURRENT

DENSITY VALUE FOR SYNCHRONOUS

GENERATORS

 

 

This work presents the way linear current density values influences the dimensions, costs, and performances of some synchronous generators. The studied generators, with various rated speed, were designed following classic and optimal methods in order to determine the linear current density optimal value depending on a specific optimization criterion. The optimal design has been realized with the Simplex algorithm where the objective function aims total cost reduction for the synchronous generator. The linear current density value has been determined for both the classical design and for the optimized solution. Comparing the two results we analysed the impact these variable has on the synchronous generator’s dimensions, mass, losses, on the generator’s efficiency, costs, and flask currents. We draw conclusions referring to the optimal value tendency for the linear current density depending on its variation interval and on the generator’s rotation speed.

From the analysis we observe that to achieve a cost-optimal synchronous generator, the linear current density value must be chosen close to the upper limit of the variation interval.

 

Keywords: the objective function, the optimal design, synchronous generator, current blanket

Cuvinte cheie: funcţie obiectiv, proiectare optimală, generator sincron, pătura de curent

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31-37 PIERDERILE PE LINIA DE ALIMENTARE A UNUI CONSUMATOR TRIFAZAT LEGAT ÎN STEA

THE SUPPLY LINE LOSS OF A  THREE-PHASE LOAD IN STAR CONNECTION

 

The electrical power system usually operated in a symmetrical three-phase steady state mode. But, there are certain situations that can cause non-symmetrical operations. The presence of the unbalanced three-phased loads induce the apparition of  the non-symmetrical systems involving currents and voltages as well the extra-loss within the supply wire. In this work we present a mathematical proof in Mathcad of additional losses in the electrical energy transmission line working under non-symmetrical conditions. Was considered a simplified model in star connection, but the obtained result generalizes to complex electrical circuits. Finally, we  show the conclusions and references.

 

Keywords: three-phase load, star connection, active power, electrical energy transmission line, supply line loss, unbalanced functioning regime, mathematical proof in the Mathcad of additional losses under unbalanced conditions

Cuvinte cheie: receptor trifazat, conexiune în stea, putere activă, linie de transport a energiei electrice, pierderi pe linia de alimentare, regim dezechilibrat de funcţionare, demonstraţie matematică în mediul Mathcad a pierderilor suplimentare în regim dezechilibrat

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31-36 UTILIZAREA APLICAȚIILOR MATEMATICE LA PROGNOZA CONSUMULUI DE GAZE

APPLICATIONS USAGE MATHEMATICS AT THE

FORECAST OF GAS CONSUMPTION

 

Moldova’s energy sector represents a strategic branch of the national economy. The level of development of this sector essentially determines macroeconomic stability and energy security of the country and the success of strategies and programs to achieve national economy.

 

Keywords: energy, forecast, natural gas consumption, gas consumption growth

Cuvinte cheie: energie,  prognoză,  consum de gaze naturale, dinamica consumului de gaze

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31-35 GOSPODĂRIREA ENERGIEI ÎN ROMÂNIA

ENERGY MANAGEMENT IN ROMANIA

 

January 2017 was a month of authentic winter in Romania. But this winter has revealed the real state of energy management in our country. This article represents the thoughts and concerns of „ordinary mans” related to the management of energy in Romania.

 

Keywords: thermal energy, electricity, energy management

Cuvinte cheie: energie termică, energie electrică, gospodărirea energiei

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31-34 CONSECINŢE PEDAGOGICE ALE INSTRUIRII ASISTATE PE CALCULATOR DIN PUNCT DE VEDERE AL STIMULĂRII IMAGINAŢIEI, DEZVOLTĂRII GÂNDIRII LOGICE ŞI A CREATIVITĂŢII

CONSEQUENCES OF TRAINING PEDAGOGICAL COMPUTER ASSISTED IN TERMS OF IMAGINATION STIMULATION, DEVELOP LOGICAL THIKING AND CREATIVITY

 

Integration of educational technologies in the formative education requires the school to focus on the development of thinking, by selecting this content, methods, forms and training and assessment criteria, i.e. to develop educational technology that develops a certain style of learning with lasting effect.

 

Keywords: training pedagogical computer, imagination, creativity, logical thinking

Cuvinte cheie: instruirea asistată de calculator, imaginație, creativitate, gândire logică pedagogică

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31-33 METODA ORGANIZATORULUI GRAFIC ÎN DEZVOTAREA CREATIVITĂȚII LA STUDENȚI (ELEVI)

METHOD DEVELOPEMENT OF CREATIVITY IN GRAPHIC ORGANIZER TO STUDENTS

 

The paper present aspects of a mix of modern techniques interactive and traditional so that theeducation itself to meet the current needs of students, can boost the capabilities available to them to be as attractive and practical so trhat it can keep the interest to participate activfely in the activities proposed and carried out.

 

Keywords: graphic organizer, active learning method, spider dioagram map (spiderweb)

Cuvinte cheie: organizator grafic, metodă de învățare activă, hartă diagrama păianjen

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31-32 EVALUAREA, METODE, TEHNICI DE EVALUARE, ROLUL EVALUĂRII

EVALUATION, METHODES, SKILLS ASSESMENT, EVALUATION ROLE

 

In this paper presents the role of evaluation in education. It also brings into focus the importance of evaluating teacher’s and how they must assume the role of assessment depending on the techniques and methods used in the evaluation.

 

Keywords: evaluation methods, skills assements, evaluation role

Cuvinte cheie: metode de evaluare, evaluarea competențelor, rolul evaluării

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31-31 ÎMBUNĂTĂȚIREA MANAGEMENTULUI UNIVERSITAR PRIN UTILIZAREA UNOR METODE DE EFICIENȚĂ – UN STUDIU DE CAZ PRIN METODA DEA

THE IMPROVEMENT OF UNIVERSITY MANAGEMENT BY THE USE OF EFFICIENCY METHODS –

A CASE STUDY IN DEA

 

The value of a university is how it relates to the society’s needs, to the quality assurance regarding the preparing of specialists in various areas of activity, as well as to the performance of research activities and scientific development. This paper illustrates the application of Data Envelopment Analysis (DEA) to evaluate the relative efficiency of public universities in Romania. The results of this study show that DEA application to assess relative efficiency among public universities in a certain country is a reliable approach by providing quantitative indicators for comparative analysis.

 

Keywords: DEA, efficiency, analysis, teachers, students

Cuvinte cheie: DEA, eficiență, analiză, profesori, studenti

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31-30 STUDIU PRIVIND ÎMBUNĂTĂȚIREA ACTIVITĂȚII UNUI CENTRU DE CERCETARE

STUDY ON IMPROVING THE ACTIVITY OF

A RESEARCH CENTRE

 

The study started from anticipating and identifying changes related to the research center, defining strategic objectives and building both imaging research center, its work and relations with partners/ customers. The novelty developed in this study is to address three successive analytical methods and the use of two software MACTOR (Méthode ACTeurs, Objectifs, Rapports de force) and Micmac.

 

Keywords: research, strategic analysis, scouting

Cuvinte cheie: cercetare, analiză strategică, prospecție

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31-29 IMPACTUL BRANDURILOR FARMACEUTICE ASUPRA DECIZIEI DE CUMPĂRARE ÎN RÂNDUL CONSUMATORILOR – STUDIU DE CAZ

IMPACT ON PHARMACEUTICAL BRANDS AMONG DRUG PURCHASE DECISION – A CASE STUDY

 

This study aimed to provide answers on the impact of medicines promotions on consumer behaviour. Article consists of the synthesis of the literature in the field of sales of medicinal products, analyse the current state of the theme and issues relating to the improvement of consumer behaviour on buying medicines, influenced by using modern means of promotion by pharmaceuticals brands. The article originality is provided by exploratory research undertaken, literature synthesis which provides an understanding of the mechanism of drug consumption behaviour under the influence of modern methods of promotion.

 

Keywords: brand medicines, consumer behaviour, market         Cuvinte cheie: brand de medicamente, comportamentul consumatorilor, piața farmaceutică

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31-28 DESPRE IMPORTANŢA TERAPIILOR COMPLEMENTARE

ABOUT THE IMPORTANCE OF THE

COMPLEMENTARY THERAPIES

 

The main aim of this article is to achieve a synthesis of the situation caused by musculoscheletal pain disorders, with a focus on the low back pain (Lower Back Pain), cost, implications, and to what extent complementary approaches can be an aid în order to meet the empowerment of individuals, their families, society and în effect of reducing the number of deceased persons due to the negative effects produced by drugs. This synthesis is based on the data published în the U.S., the data found for Romania and Europe are inadequate and irrelevant în order to draw a conclusion. However, there are some data presented and compared the U.S. and European countries including Romania and not only, as the level of investment în the sector of medical care services for the population.

 

Keywords: health, complementary therapies, lifestyle, obesity, vibration

Cuvinte cheie: sănatate, terapii complementare, stil de viață, obezitate, vibrații

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31-27 ARHETIPUL CONCENTRIC ȘI INELELE LUI LIESEGANG

CONCENTRIC ARCHETYPE AND LIESEGANG RINGS

           

The concentric rings is one of the most common archetypal structures are to be monitored at macro/microcosmic full diversity of natural structures of concentric rings similarities, connections, analogies, putting together physical phenomena of segregation, standing waves and osmotic ring diffusion periodic precipitation process phenomena Liesegang type.

 

Keywords: concentric, Liesegang rings, biosphere, fluid, chiral, stationary  chemical wave, biostructure

Cuvinte-cheie: concentrice, inele LIESEGANG, biosferă, fluid, chiral, val chimic staționare, biostructură

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31-26 DE LA TĂBLIŢĂ LA TABLETĂ ÎN PARADIGMA INCERTĂ A DEZVOLTĂRII GLOBALE

TABLET TO THE TABLE IN GLOBAL

DEVELOPMENT PARADIGM UNCERTAIN

 

The author, specialist and promoter of the IT&C and knowledge management, present a synthesis evolution IT&C the last decades paradigm uncertain global development. Selected most representative events that marked shift towards the knowledge society

 

Keywords: blackboard, tablet, electrification, assistant versatile computer, radio reception, telephone, mobile phone, mechatronics, robotics

Cuvinte cheie: tăbliţă, tabletă, electrificare, AIV, recepţie radio,  telefonie, radiocomunicaţii, telefon mobil, mecatronică, robotică          

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31-25 BIOCIBERNETICA – DOMENIU INTERDISCIPLINAR FUNDAMENTAL

BIOCYBERNETICS – FUNDAMENTALLY

INTERDISCIPLINARY FIELD

 

The paper „Biocybernetics-fundamentally interdisciplinary field-aspect”, shows the connection between cybernetics and cybernetic processes, systems modelling, homeostasis adjustment mechanisms, self-regulation, the psychic powers of human neural, canal system for the transmission of information, information transmission, signal processing, the general scheme of a simple system of transmitting information and ends in that whole nervous system is a huge system of transmission and processing of the information received from the surrounding world or from within your own body.

Keywords: bio-cybernetics, message, trimming signals, information

Cuvinte cheie: biocibernetica,  mesaj, aranjarea semnalelor, informație

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31-24 LIMBA FRANCEZĂ ÎN PUBLICAȚIILE ȘTIINȚIFICE

FRENCH language IN SCIENTIFIC PUBLICATIONS

 

This paper proposes to review the languages in which scientific articles were written in the past and are written in the present. We can remark two antithetic phenomena the supremacy of English and the decay of French a fact which leads, at least for the moment, to the instauration of a single language in the sphere of sciences.

Keywords: scientific publications, decay of French, unique language

Cuvinte cheie: publicații științifice, decadența limbii franceze, limbă unică

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