Cristian Paul CHIONCEL


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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30-28 PROIECTAREA ASISTATĂ DE CALCULATOR ArtCAM A UNUI PROIECT 3D

3D ARTCAM COMPUTER AIDED DESIGN
The present paper describes a 3D Computer Aided Design project in
ArtCAM Software. The article summarizes the steps that lead to final 3D design
project. In the first step, we create a new project related to size: 300 mm length
of 200 mm width and 30 mm thickness; after we choose the type of milling,
turning him and effective processing size desired by the designer. Once the text
form and processing technology selected, we can move to the second, very
important, step, dimension conversion from 2D to 3D. In the 3D dimension, we
will design the desired text only after we generate to the text of milling
simulation. If based on the simulation text processing gives satisfaction, the file
will be saved in the machine to machine depending on the characteristics of
supported extensions.
Keywords: 2D to 3D conversion, 3D design, design, program, machine
code, ArtCam Software
Cuvinte cheie: conversia 2D în 3D, proiectare 3D, design, program cod
maşină, ArtCam Software

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29-86 METODE DE EVIDENŢIERE A FRECVENŢELOR APROPIATE

METHODS TO HIGHLIGTH CLOSE FREQUENCY
This paper offers an overview of simpler methods to accurately
estimate frequencies. In standard signal processing, the precision of frequency
estimation increases once the frequency resolution is improved. A finer
resolution is achieved by increasing the observation time interval. If this cannot
be done, the signal length can be artificially extended through the so-called
”zero-padding” method, by adding a number of samples with null amplitude.
The methods have been tested for concrete cases, using the signal processing
tool offered by the open source software, Scilab.
Keywords: signal processing, spectral analyze, “zero-padding” method,
Scilab environment
Cuvinte cheie: procesarea semnalelor, analiza spectrală, metoda
“zero-padding”, mediul Scilab

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