2.252 articole găsite pentru „in”.
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UNELE ASPECTE ALE CINETOSTATICII MULTIPLICATOARELOR PLANETARE PRECESIONALE
R. CIOBANU (Republica Moldova)
Evoluţia progresului tehnic al industriei constructoare de mașini este influenţat în mare măsură de performanţele mecanismelor de transformare și transmitere a mișcării și energiei. Un element important al sistemelor energetice aparţine multiplicatoarelor car…
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PROGNOZAREA CREȘTERII CALITĂŢII VIEŢII ÎN REPUBLICA MOLDOVA PRIN REŢELE PETRI HIBRIDE
Dr. hab., conf. univ. Svetlana GOROBIEVSCHI (R. Moldova),Dr. hab. șt. tehnice, prof. univ. Emilian GUȚULEAC (R. Moldova)
În articol, autorii prezintă un aspect legat de situaţia economică dificilă din Moldova, privind creșterea economică și calitatea vieţii (CV). Ca un indicator al CV global este considerat Indicele Dezvoltării Umane (IDU) propus de PNUD și completat permanent …
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FLEXIBLE ALTERNATING CURRENT TRANSMISSION LINE WITH SERIES CAPACITIVE COMPENSATION AND PHASE SHIFTING TRANSFORMER AS LINE OF INTERSYSTEM CONECTIONS
Prof. Mihail KIORSAK (R. Moldova), Prof. Tudor AMBROS (R. Moldova), Sc.res. Lilia TURCUMAN (R. Moldova)
Tendinţa modernă de integrare și creare a sistemelor energetice regionale sau interstatale impune condiţii suplimentare către liniile electrice de interconexiune de tensiune înaltă ca linii de legătură dintre sistemele interconectate. Cerinţa majoră o constit…
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SISTEMUL 20 DE CHEI – PROGRAM PRACTIC DE DEZVOLTARE A ÎNTREPRINDERII
Rodica BALABAN, Demian UŞANLÎ
În scopul creşterii culturii generale de producţie la un nivel modern, asigurării unei organizări clare a producţiei şi utilizării eficiente a resurselor, este necesară implementarea „20 Key System “ – Program Practic pentru Îmbunătăţirea Continuă a Companiei…
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UPON ANALITICAL AND NUMERICAL CALCULUS OF THE MAIN PARAMETERS OF THE DETONATION PROCESS
Vasile NĂSTĂSESCU1,Ghiţă BÂRSAN
This paper presents some results of scientific research undertaken by the authors, regarding the numerical modeling of the detonation process, both the Finite Element Method (FEM) and the method of free particles, in version of Smoothed Particle Hydrodynamics…
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PREDICTIVE MAINTENANCE APPLIED TO LASTING EQUIPMENT
Velicu ŞTEFAN, Ionel PĂUNESCU, Marius PARASCHIV, Paul Liviu PĂUNESCU
This paper highlights the research conducted for proactive maintenance application by analyzing vibration and temperature monitoring during equipment operation, a method that provides a beneficial way clear, comprehensive and thorough to maintain normal opera…
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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…
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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…
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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…
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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…
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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…
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GOLD MINING: ECONOMIC DEVELOPMENT VERSUS SUSTAINABLE DEVELOPMENT
Victor ARAD, Susana ARAD, Vlad COSMA
Against the prolonged economic crisis, the mining resources have regained the investors' attention. Demand for gold continues to increase worldwide and the high price of gold ounce compared with historical values, indicating a favorable global context of the …
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CURRENT RESEARCH DIRECTIONS IN BUILDING PHYSICS IMPROVING PERFORMANCE LEVELS FOR NEW OR RENOVATED BUILDINGS
Adrian RADU, Maricica VASILACHE, Marian PRUTEANU
In the present climatic, social and political conditions, the EU energy independence is emerging as a priority. Therefore, it set new levels of thermal protection minimum required and adapting buildings architecturally to achieve a maximum of energy efficienc…
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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…
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MAGNETIC CHARACTERISTICS OF NON-ORIENTED SILICON IRON STRIPS OBTAINED THROUGH MECHANICAL, LASER, ELECTRICAL DISCHARGE AND WATER JET CUTTING TECHNOLOGIES
Horia GAVRILĂ, Veronica MĂNESCU (PĂLTÂNEA), Gheorghe PĂLTÂNEA, Gheorghe SCUTARU, Ioan PETER
The increase of the asynchronous motors efficiency may be usually made by decreasing the total energy losses in the magnetic circuits. Non-oriented silicon iron (NO Fe-Si) sheets are soft magnetic materials with a nearly isotropic grain texture. They are used…
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WHY MECHATRONICS, INTEGRONICS & ADAPTRONICS?
Gheorghe Ion GHEORGHE
The paper “Why Mechatronics, Integronics & Adaptronics?” deals with the new concepts, innovative solutions and intelligent constructions of products, systems of products and systems of systems of intelligent products, with applications specific to their real …
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CONSIDERATIONS ON ROMANIA’S SUSTAINABLE ENERGY DEVELOPMENT
Aureliu LECA
This analysis looks into the sustainability of the Romanian energy sector against the main trends in the world economy and within the framework of the energy and environment policies of the European Union (EU). The gloom and doom conclusion, that sustainable …
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INTERNATIONAL VISIONS ON THE USE OF NATURAL RESOURCES IN TERMS OF SUFFICIENCY, IN ROMANIA
Nicolae Tiberiu ILIAŞ, Ioan GÂF-DEAC, Ioan I. GÂF-DEAC, Iosif ANDRAS
The paper the use of natural resources in terms of sufficiency is examined, by making operational elements of management and energy diplomacy, published in the early part of the twenty-first century all over the world. In this context, a number of key element…
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CONCEPTUAL DESIGN OF RENEWABLE-BASED ENERGY MIXES FOR SUSTAINABLE COMMUNITIES
Ion VISA, Anca DUTA, Macedon MOLDOVAN, Bogdan BURDUHOS
The transition towards a new, sustainable and affordable energy pattern is defined in the European Union document known as SET Plan (The European Strategic Energy Technology Plan). As the built environment accounts for over 40% of the total energy consumption…
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NEW CONCEPTS FOR INCREASING THE BUILDINGS ENERGY EFFICIENCY
Anca DUTA, Ion VISA, Macedon MOLDOVAN, Mihai COMSIT
The efficient use of energy is a compulsory step towards sustainable development. Regardless the source (fossil fuel or renewable), energy consumption should be efficient to protect the resources and to lower the overall costs. This is particularly valid for …