Numerical analysis and comparative study of short circuit stress in IGBTs devices (IR, IXYS)

2007 ◽  
Vol 47 (9-11) ◽  
pp. 1773-1778 ◽  
Author(s):  
Ly. Benbahouche ◽  
A. Merabet ◽  
A. Zegadi
Keyword(s):  
Numerical Analysis ◽  
Comparative Study ◽  
Short Circuit

Comparative study of stress distribution in Astra and Xive implant systems and in surrounding bone. A numerical analysis

2015 ◽  
Vol 65 (2) ◽  
pp. 108-171
Author(s):  
Daria Basmadji ◽  
Stanisław Kut ◽  
Zdzisław Bereznowski
Keyword(s):  
Numerical Analysis ◽  
Stress Distribution ◽  
Comparative Study ◽  
Surrounding Bone

Numerical analysis of short-circuit safe operating area for p-channel and n-channel IGBTs

1991 ◽  
Vol 38 (2) ◽  
pp. 303-309 ◽  
Author(s):  
N. Iwamuro ◽  
A. Okamoto ◽  
S. Tagami ◽  
H. Motoyama
Keyword(s):  
Numerical Analysis ◽  
Short Circuit ◽  
Safe Operating

scholarly journals Solving the four index fully fuzzy transportation problem

2020 ◽  
Vol 11 (2) ◽  
pp. 199-215
Author(s):  
Manal Hedid ◽  
Rachid Zitouni
Keyword(s):  
Numerical Analysis ◽  
Comparative Study ◽  
Transportation Problem ◽  
Fuzzy Numbers ◽  
Feasible Solution ◽  
Second Phase ◽  
Approximation Methods ◽  
Initial Feasible Solution ◽  
Fuzzy Transportation Problem ◽  
Two Phases

In this paper, we will solve the four index fully fuzzy transportation problem (\textit{FFTP$_{4}$}) with some adapted classical methods. All problem's data will be presented as fuzzy numbers. In order to defuzificate these data, we will use the ranking function procedure. Our method to solve the \textit{FFTP$_{4}$} composed of two phases; in the first one, we will use an adaptation of well-known algorithms to find an initial feasible solution, which are the least cost, Russell's approximation and Vogel's approximation methods. In the second phase, we will test the optimality of the initial solution, if it is not optimal, we will improve it. A numerical analysis of the proposed methods is performed by solving different examples of different sizes; it is determined that they are stable, robust, and efficient. A proper comparative study between the adapted methods identifies the suitable method for solving \textit{FFTP$_{4}$}.

scholarly journals A Comparative Study of BaTiO3/PDMS Composite Film and a PVDF Nanofiber Mat for Application to Flexible Pressure Sensors

2021 ◽  
Vol 59 (6) ◽  
pp. 412-421
Author(s):  
Donghyuck Park ◽  
Kwanlae Kim
Keyword(s):  
Comparative Study ◽  
Composite Film ◽  
Short Circuit ◽  
Composite Films ◽  
Pressure Sensors ◽  
Compressive Force ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Force Range ◽  
Flexible Pressure Sensors

A Comparative Study of BaTiO3/PDMS Composite Film and a PVDF Nanofiber Mat for Application to Flexible Pressure SensorsIntensive research has been conducted to develop flexible piezoelectric pressure sensors, since selfpowering devices are advantageous for wearable electronic applications. Recently, two types of piezoelectric devices, ceramic-PDMS composite film and PVDF nanofiber mats, have drawn attention in the research community. Piezoelectric ceramics such as BaTiO3 (BTO) and PZT exhibit outstanding piezoelectric coefficients, while PDMS provides flexibility. In contrast, a PVDF nanofiber mat simultaneously exhibits piezoelectricity and flexibility. In the present study, a comparative analysis of BTO-PDMS composite film and a PVDF nanofiber mat for application to flexible pressure sensors was carried out. First, step-wise electric poling was conducted on these two types of pressure sensors, after which the open-circuit voltage (Voc) was measured under compressive force. The 1.8 V peak-to-peak Voc was measured in a BTO-PDMS composite with a 30 wt.% BTO content that was poled by 10 kV/mm electric field for 15 min. This peak-to-peak Voc of the BTO-PDMS composite increased further to ~ 4 V when it was poled for 24 hr. Unlike the BTO-PDMS composite films, the maximum Voc (1.1 V) was measured in a PVDF nanofiber mat that did not undergo subsequent electric poling. A BTO-PDMS composite film and a PVDF nanofiber mat were fabricated, and the compressive force and strain-rate dependencies of Voc and the short-circuit current (Isc) were investigated. Overall, the Voc and Isc of the BTO-PDMS composite film exceeded those of the PVDF nanofiber mat in a force range of 1 − 25 N and frequency range of 0.5 − 2.0 Hz. However, the Voc and Isc signals from the PVDF nanofiber mat were more stable than those from the BTO-PDMS composite film due to the longer lifetime of the signals.

scholarly journals Observation of Graphite-Like and Diamond-Like Nanostructures in the Raman Spectra of Natural and Synthesized MoS2 Crystals with Small Carbon Additives

2020 ◽  
Vol 21 (4) ◽  
pp. 598-620
Author(s):  
N.E. Kornienko ◽  
A.P. Naumenko ◽  
L.M. Kulikov
Keyword(s):  
Laser Radiation ◽  
Numerical Analysis ◽  
Comparative Study ◽  
Raman Spectra ◽  
Electronic States ◽  
Carbon Structures ◽  
Carbon Additives ◽  
Spectral Components ◽  
Graphite Structure ◽  
Resonant Radiation

A comparative study of Raman spectra excited by laser radiation λL = 632.8 nm and 488 nm of natural crystals of 2H-MoS2 and nanocrystallites MoS2 (C) containing 0.5 and 1.0 wt.% Carbon additives. A detailed numerical analysis of the shape of observed D and G bands was performed. The complication of the spectra of graphite-like and diamond-like structures with the appearance of additional spectral components at 1440-1500 cm-1 and 1230-1270 cm-1 as a result of doubling the size of the corresponding elementary quasi-cells are analyzed. It is shown that the frequencies of  D-bands of diamond-like nanostructures 1297 ÷ 1302 cm-1 don’t depend on λL in contrast to the change in the frequencies of the G (k)-bands. A significant effect of 632.8 nm resonant radiation on the electronic states and properties of MoS2 (C) NC was established. The strengthening of the D bands of the diamond-like structure and the ordering of the graphite structure with increasing carbon content in MoS2 (C) nanocrystals have been established. The change of spectral positions of D, G, and G (k) bands at strengthening the degree of disordering of a diamond- and graphite-like structures is considered. The influence of laser radiation on carbon structures is discussed.

Numerical analysis of CZTS/n-Si solar cells using SCAPS-1D. A comparative study between experimental and calculated outputs

2021 ◽  
Vol 121 ◽  
pp. 111544
Author(s):  
Amina Houimi ◽  
Serap Yiğit Gezgin ◽  
Bedrettin Mercimek ◽  
Hamdi Şükür Kılıç
Keyword(s):  
Solar Cells ◽  
Numerical Analysis ◽  
Comparative Study ◽  
Si Solar Cells
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