2.055 articole găsite pentru „IT”.
-
MONITORIZAREA ACTIVĂŢILOR DE COMBATERE A CĂDERILOR DE GRINDINĂ ÎN ZONE TRANSFRONTALIERE. REZULTATE OBŢINUTE ÎN PROIECTUL MIS ETC 166
Prof. dr. ing. Gheorghe MANOLEA, Şef. lucr. dr. ing. Laurenţiu ALBOTEANU, As. dr. ing. Constantin ŞULEA-IORGULESCU
Universitatea din Craiova, Centrul de Inovare și Transfer Tehnologic - CITT a inceput cercetarile privind modernizarea echipamentelor complementare din sistemul antigrindina in anul 2000 printr-o colaborare cu Universitatea Tehnica a Moldovei din Chișinău in …
-
SOME ASPECTS REGARDING STRESS WAVE PROPAGATION IN TRONCONICAL SHORT BARS WITH VARIABLE ANGLE
Nicolae ILIESCU, Vasile NĂSTĂSESCU, Costică ATANASIU
In the first part of the paper an algorithm of calculus, using FEM, developed by the authors in a previous paper, is presented. This computational algorithm was applied in the study of stresses wave propagation produced by an axial impact in a tronconical sho…
-
ASPECTS ON THE DESIGN AND IMPLEMENTATION OF A TRACKED MINI-ROBOT WITH ELECTRIC ACTIONING OBTAINED FROM SOLAR ENERGY CAPTURE
Silviu-Mihai PETRIŞOR, Cosmin-Iulian GRIGORAŞ
The authors of this paper wish to highlight elements regarding the organology, functioning and simulation, in a real workspace, of a tracked mini-robot with electric actioning obtained from solar energy capture with a load of explosives attached a technologic…
-
EFFICIENT COMPUTATIONS WITH STRUCTURED MATRIX PENCILS IN AUTOMATIC CONTROL
Vasile SIMA
There is a continuous research effort worldwide to improve the reliability, efficiency, and accuracy of numerical calculations in various domains. One of the most promising research avenue is to exploit the structural properties of the mathematical problems t…
-
CONTROL AND COORDINATION OF ECONOMIC AND INTELLECTUAL ACTIVITIES BY INTEGRATED COMPLEX STRUCTURES
Constantin MARIN
This paper belongs to the category of research for the development and implementation of heterogeneous structures they apply favorable inclusion of the human factor for control and coordination of complex activities from various fields: economic, intellectual…
-
A SOCIO-ECONOMIC REGULARITY ESTABLISHED BASED ON AN ANALOGY WITH THERMODYNAMIC PROCESSES WITH FINITE SPEED - An Equation for Standard of Living -
Ioan GANEA, Adrian S. PETRESCU, Liliana TIMOFAN , Stoian PETRESCU, Monica COSTEA
This paper proposes a quantitative description of the flows of energy, mass and information in a country, based on recently developed concepts in Thermodynamics with Finite Speed. An equation for Standard of Living is derived. As shown in the ‘70 by Georgescu…
-
DISCOVERY OF “QUANTUM NUMBERS” IN THE CARDIOPULMONARY INTERACTION STUDIED IN THERMODYNAMICS WITH FINITE SPEED
Stoian PETRESCU, Valeria PETRESCU , Monica COSTEA, Liliana TIMOFAN, Silvia DANES, Georgeta BOTEZ
The paper proposes an extension of Thermodynamics with Finite Speed (TFS) to Biological Systems, with Cardio-Pulmonary System study as the first objective. It is an extremely important system in the functioning of any blood beings (including humans). For stat…
-
MEANS FOR QUALITATIVE AND QUANTITATIVE DESCRIPTION OF THE CARDIO-PULMONARY SYSTEM OPERATION WITHIN IRREVERSIBLE THERMODYNAMICS WITH FINITE SPEED
Stoian PETRESCU, Monica COSTEA, Liliana TIMOFAN, Valeria PETRESCU
Illness and aging are irreversible processes, which inevitably affects us all. The answers to the questions how, why, and how much irreversible are the cardio-respiratory system processes, will allow improved design of artificial hearts and lungs (vital “spar…
-
SOME ASPECTS CONCERNING THE DURABILITY OF SERVICE AND DEVELOPMENT IN THE BUILDING SECTOR
Horea SANDI
The paper is aimed to present some ideas on the connection between the strategies of development of a safe and reliable infrastruacture as a whole and the components pertaining to the built environment. After a brief look on the development of methods of stru…
-
INCREASING SUSTAINABILITY OF THE HOUSING STOCK BY AVOIDING DAMAGE CAUSED BY THE SOIL-STRUCTURE RESONANCE
Dinu BRATOSIN
In any dynamic system, the coincidence between natural period and excitation period (the resonance) lead to extremely large dynamic amplification. For example a linear system with damping of order 25% the dynamic amplification factor has values between d…
-
POSSIBLE MEASURES OF TAKING-OVER/ DYNAMIC CONTROL OF SEISMIC ACTIONS APPLICABLE TO URBAN UTILITY SYSTEMS. SEISMIC WAVES DEFLECTION/ DAMPING USING METAMATERIALS
Bogdan UNGUREANU, Gabriela M. ATANASIU, Victoria COTOROBAI
Nowadays, an accurate seismic prediction regarding the date, location and magnitude is still a challenge, thing that implies taking into consideration efficient, preventive, seismic risk management measures, not only for civil buildings but also for urban uti…
-
INTERNAL RESONANT TRANSFORMER WITH DISTRIBUTED OPEN MAGNETIC CORE
Andrei MARINESCU, Aurelia SCORNEA, Ionel DUMBRAVA
The on-site dielectric tests on cables and high power electric machines requires the achievement of some medium voltage testing facilities with reduced dimensions and weights, allowing the compensation of the important reactive energy required by the own capa…
-
THEORETICAL CONSIDERATIONS ON THE MICROMECHANICS COMPOSITE MATERIALS
Constantin D. STǍNESCU, Doina TǍRǍBUŢǍ (ENE),Mariana PǍTRAŞCU (ANTONESCU, Melania TĂMAȘ
the efficiency of a composite material is distinguished by the top level of the technical characteristics and its properties. For their study, it appeals to a number of considerations, such as: minimum dimensions of the primary elements of reinforcement secti…
-
THEORETICAL RESEARCH ON THE MODELING OF CHARACTERISTICS OF COMPOSITE MATERIALS
Constantin D. STǍNESCU, Doina TǍRǍBUŢǍ (ENE),Mariana PǍTRAŞCU (ANTONESCU), Melania TĂMAȘ
the two components of the composite material, i.e., the matrix and the wire, take the requests differently compared with their rigidity. The way the force applied is taken over by composite components and their structural deformities depend on the connection …
-
ANALIZA RISCURILOR INTEGRITĂŢII STRUCTURALE A PALELOR TURBINELOR EOLIENE
Șef lucr. dr. ing. Mariana Domnica STANCIU, Prof. univ. dr. ing. Ioan CURTU, Fiz. dr. Adriana SAVIN, Drd. Rozina STEIGMANN, Ing. Ionuț TEȘULĂ
Lucrarea prezintă o sinteză generală a factorilor de risc ce duc la pierderea stabilității structurale a palelor turbinelor eoliene. Aceștia gravitează în jurul următoarelor aspecte cheie: calitatea materialului, calitatea geometriei și design-ului, tehnologi…
-
ANALIZA CU ELEMENTE FINITE ŞI OPTIMIZAREA GEOMETRICĂ A UNEI STRUCTURI METALICE FORMATE DIN GRINZI CU ZĂBRELE DE TIP TRAPEZOIDAL
Conf. dr. ing. Camelia CERBU, Ing. Paul UNGUREANU
Obiectivul principal al acestui articol este proiectarea unei structuri din oţel având rolul de acoperiș pentru hală, formată din șase grinzi cu zăbrele de tip trapezoidal. Mai întâi, se stabilesc forma și dimensiunile grinzii cu zăbrele de tip trapezoidal. B…
-
ROLUL INTRODUCERII SISTEMELOR DE MONITORIZARE A INTEGRITĂŢII STRUCTURALE ÎN APLICAŢIILE DIN INDUSTRIA AEROSPAŢIALĂ
Drd. ing. Diana CAZANGIU, Drd. ing. Gabriel DIMA, Prof. univ. dr. ing. Ileana ROŞCA
Industria aerospaţială utilizează de regulă cu structuri cu cerinţe speciale, cum ar un număr mare de cazuri de calcul sau rezistenţa la oboseală, în condiţiile unei mase structurale minime. Constrângerile aerodinamice introduc restricţii suplimentare, rezult…
-
PROIECTAREA ASISTATĂ BAZATĂ PE CAZURI A DISPOZITIVELOR DE PRINDERE
Prof. dr. ing. Tudor PĂUNESCU, Conf. dr. ing. Rodica PĂUNESCU
Deși au fost propuse și implementate numeroase metode și tehnici pentru proiectare asistată a dispozitivelor de prindere (CAFD), domeniul continuă să rămână o frână majoră în integrarea CAD și CAM, aplicaţiile CAFD comerciale fiind foarte limitate. Lucrarea p…
-
MATERİALE COMPOZİTE UTİLİZATE ÎN CONSTRUCŢİA DE AERONAVE
Ing. Bogdan SPINEANU
Lucrarea se adresează inginerilor și celor care doresc să aprofundeze cunoştinţele privind utilizarea unor tipuri de materiale compozite în industria aeronautică și în alte domenii
-
CONSIDERATIONS ON CONTACTLESS ELECTROMAGNETIC TECHNIQUES FOR MEASURING SOIL CONDUCTIVITY
Tudor BURLAN-ROTAR, Constantin STANESCU, Melania TAMAS
Conventional determination of resistivity by galvanic method requires a relatively large amount of labor to apply them in practice and is therefore expensive. It is the lateral or vertical variations of resistivity which form the basis of any interpretation. …