George MAHALU


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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29-55 CONSIDERAȚII ASUPRA CIRCUITULUI CHUA Partea a III-a

CONSIDERATIONS ABOUT CHUA’S CIRCUIT – Part III
This paper presents modeling techniques and design nonlinear memristor
elements type, typically used in Chua’s circuit structure. Extremely laborious
analyzes and mathematical techniques modeling approach is support for
initiating many procedures for designing a linear negative resistance element,
but not only.
Keywords: memristor, nonlinear, converter, circuit
Cuvinte cheie: memristor, neliniar, convertor, circuit

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29-54 CONSIDERAȚII ASUPRA CIRCUITULUI CHUA Partea a II-a

CONSIDERATIONS ABOUT CHUA’S CIRCUIT – Part II
This paper presents modeling techniques and design nonlinear memristor
elements type, typically used in Chua’s circuit structure. Extremely laborious
analyzes and mathematical techniques modeling approach is support for
initiating many procedures for designing a linear negative resistance element,
but not only.
Keywords: memristor, nonlinear, converter, circuit
Cuvinte cheie: memristor, neliniar, convertor, circuit

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29-53 CONSIDERAȚII ASUPRA CIRCUITULUI CHUA Partea I

CONSIDERATIONS ABOUT CHUA’S CIRCUIT – Part I
This paper presents modeling techniques and design nonlinear memristor
elements type, typically used in Chua’s circuit structure. Extremely laborious
analyzes and mathematical techniques modeling approach is support for
initiating many procedures for designing a linear negative resistance element,
but not only.
Keywords: memristor, nonlinear, converter, circuit
Cuvinte cheie: memristor, neliniar, convertor, circuit

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28-31 MICRO-OSCILOSCOP

MICRO-OSCILLOSCOPE
The Micro-Oscilloscopes is an application that consists into electronic board with one general purposes controller Atmega328 in conjunction with an interfacing controller Atmega8U2-MU and some peripheries. Is used too a color graphic display with possibilities to drawing multiple traces in different colours. This application is small, light, cheap and flexible tool.
Keywords: controller, display, oscilloscop, electronic board
Cuvinte cheie: controler, afişor, osciloscop, placă electronică

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26-30 ABORDAREA LOGISTICĂ A SISTEMELOR DINAMICE NELINIARE

LOGISTIC APPROACH OF THE NONLINEAR
DYNAMICAL SYSTEMS
This paper deals with the analyse of the nonlinear dynamic systems
treated under logistic map formalism. Also, a new method of chaos behaviour
investigation is treated, through the dynamic logistic map theory. Some results
of Matlab simulation analysis has been presented.
Keywords: nonlinear system, logistic map, chaos, parameter, attractor
Cuvinte cheie: sistem neliniar, hartă logistică, haos, parametru,
atractor
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18-40 SISTEM GIROSCOPIC DE STABILIZARE A CLĂDIRILOR LA PERTURBAłIILE SEISMICE

SEISMIC BUILDING-STABILIZING GYROSCOPIC SYSTEM
This paper presents a technical approach for seismic risk reduction of
buildings problem. Using a gyroscopic system installed in the building
foundation, stabilizers increase compared seismic waves or wind. A study of
the reaction system was achieved through a simulation in Matlab environment.
The results showed a good response of the building structure in relation to
seismic energy discharge.
Cuvinte cheie: giroscop, seism, clădire, stabilizare

40 SISTEM GIROSCOPIC DE STABILIZARE A


19-22 TEHNICI DE ANALIZĂ ÎN MECANICA SISTEMELOR COMPLEXE UTILIZÂND TEORIA HAOSULUI

ANALYTICAL TECHNIQUE SOFCOMPLEX MECHANICAL
SYSTEMS USING CHAOSTHEORY
This paper presents the approach to the development of a system
described chaotic behavior characterized by using baker’s transformation.
There are detailed rules on the introduction of specific concepts such as
Lyapunov coefficient and prediction horizon. There are also examples of the
use of charts and baker’s diagrams description to the attractor for the logistic
equation.
Keywords: baker’s transformation, Lyapunov coefficient, prediction
horizon, entropic system
Cuvinte cheie: transformarea brutarului, coeficient Lyapunov, orizont
predictiv, sistem entropic

22 TEHNICI DE ANALIZĂ ÎN MECANICA SISTEMELOR


19-23 CONSECINŢE ALE ANALIZEI MECANICII SISTEMELOR COMPLEXE PRIN TEORIA HAOSULUI

CONSEQUENCES OF COMPLEX SYSTEMS MECHANICS
ANALYSIS BY CHAOS THEORY
This paper presents issues characterized by evolving entropic
systems, from studies made by Boltzmann and Poincare and continuing with
research and results of modern theories developed by Kolmogorov, Popper and
Prigogine. In the second part of the paper there are reflections of the authors
about own definitions of the space and time entities in the frame of the complex
systems.
Keywords: time arrow, dynamic system, chaos, entropic system
Cuvinte cheie: săgeata timpului, sistem dinamic, haos, sistem
entropic

23 CONSECINŢE ALE ANALIZEI MECANICII SISTEMELOR


23-42 PROIECTAREA UNUI AUTOMAT DE UZ GENERAL CU MICROCONTROLER PE OPT BIŢI

DESIGN A GENERAL PURPOSE EIGHT BIT
MICROCONTROLLER SYSTEM
This paper deals with the design of an eight bit microcontroller. The
reason for choosing such a microcontroller has been a low cost and an high
flexibility in applications respectively. Through proper programming and minimal
hardware changes, it is possible to design any automatic control applications in
a short time and with maximum efficiency.
Cuvinte cheie: microcontroler, bit, magistrala de date, port, program
aplicativ
Keywords: microcontroller, bit, data bus, port, application program

23-42 PROIECTAREA UNUI AUTOMAT DE UZ GENERAL


21-44 MODELAREA CÂMPULUI ELECTROMAGNETIC UTILIZÂND POTENŢIALUL VECTOR

ELECTROMAGNETIC FIELD MODELLING
USING VECTOR POTENTIAL
This paper deals with modeling the electromagnetic field through the
vector potential. Appealing to Maxwell’s equations, field modeling provides a
tool for further investigation to study the magnetic field for RFID reader-tag
systems. The results from this article will be used in other workpaper which
treats a practical RFID system.
Keywords: RFID system, electromagnetic field, vector potential, field
modelling
Cuvinte cheie: sistem RFID, câmp electromagnetic, potenţial vector,
modelare de câmp

44 MODELAREA CÂMPULUI ELECTROMAGNETIC


21-43 MODELAREA DE CÂMP A UNUI SISTEM READER-TAG RFID

FIELD MODELLING OF A RFID READER-TAG SYSTEM
Determination of the magnetic field at large distances from the dipole,
uses specific and distinguishable models from case which calculation is made
for nearby points. The two situations are treated through distinctly ways in this
paper. The results from this article will be used directly into design a magnetic
field modelling for RFID reader-tag systems.
Cuvinte cheie: sistem RFID, câmp electromagnetic, potenţial vector,
modelare de câmp
Keywords: RFID system, electromagnetic field, vector potential, field
modelling

43 MODELAREA DE CÂMP A UNUI SISTEM