Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "carbon nanotube" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-7 z 7
    Tytuł:
    CNTFET Based OTRA and its Application as Inverse Low Pass Filter
    Autorzy:
    Prasad, Dinesh
    Tayal, Divyam
    Yadav, Ayesha
    Singla, Laxya
    Haseeb, Zainab
    Powiązania:
    https://bibliotekanauki.pl/articles/227047.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    carbon nanotube (CNT)
    Operational Transresistance Amplifier (OTRA)
    Opis:
    Operational Transresistance Amplifier (OTRA) has been a topic of great interest recently. OTRA has proved itself to be an appropriate device for the analog applications. As MOS scaling suffers from various problems, carbon nanotube field effect transistor (CNTFET) has came into light as one of the brightest alternative for FET (Field Effect Transistors) based devices. This work has introduced a new CNTFET based OTRA which is capable of realising inverse low pass filter using two OTRAs and few passive elements. CNTFET based OTRA has been designed and simulated at 10nm technology node. The working ability of the designed model has been conformed using HSPICE simulation. It is compared with conventional CMOS based OTRA. The comparative analysis has revealed improvement in various performance parameters. The paper also presents how change in number of carbon nanotube in CNTFETs in OTRA circuit affects the transresistance gain and input impedance. The optimized results are also discussed to improve transresistance gain and input impedance. The paper also dealt with the realisation of inverse low pass filter using proposed CNTFET based OTRA.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 4; 665-670
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multiobjective Performance Investigation of CNT Coated HSS Tool Under the Response Surface Methodology Platform
    Autorzy:
    Chandru, Manivannan
    Selladurai, Velappan
    Venkatesh, Chenrayan
    Powiązania:
    https://bibliotekanauki.pl/articles/2049740.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    carbon nanotube
    RSM
    cutting forces
    cutting tooltip temperature
    tool wear
    Opis:
    The present research employs the statistical tool of response surface methodology (RSM) to evaluate the machining characteristics of carbon nanotubes (CNTs) coated high-speed steel (HSS) tools. The methodology used for depositing carbon nanotubes was Plasma-Enhanced Chemical Vapor Deposition (PECVD). Cutting speed, thickness of cut, and feed rate were chosen as machining factors, and cutting forces, cutting tooltip temperature, tool wear, and surface roughness were included as machining responses. Three-level of cutting conditions were followed. The face-centered, Central Composite Design (CCD) was followed to conduct twenty number of experiments. The speed of cutting and rate of feed have been identified as the most influential variables over the responses considered, followed by the thickness of cut. The model reveals the optimized level of cutting parameters to achieve the required objectives. The confirmation experiments were also carried out to validate the acceptable degree of variations between the experimental results and the predicted one.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 2; 627-635
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of heat transfer during pool boiling on minifins surface coated with carbon nanotubes
    Autorzy:
    Strąk, E.
    Pastuszko, R.
    Kłosowiak, R.
    Urbaniak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/175588.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pool boiling
    carbon nanotube
    heat transfer coefficient
    power
    electronic cooling
    Opis:
    The article describes the study of heat transfer during pool boiling on minifins surface coated with nanostructure. This is a molecular level technology used in engineering or mechanical factory. A surface with carbon nanotubes (CNTs) is highly effective in reducing the superheat incipience and enhancing both the heat flux and heat transfer coefficient. The paper focuses on the comparison of the surfaces, on which pool boiling heat transfer occurs, i.e., on minifins coated with carbon nanotubes (MF+N) with surfaces formed by sintering the woven copper wire mesh to the minifins tips (MF+M) and with plain minifins surface (MF). The experiments were carried out for two boiling fluids: water and ethyl alcohol. The purpose of the presented study was to find out which of those tested surfaces and fluids could be the best alternative for use in the cooling of electronic devices and which surfaces could be used as thermosyphon or heat pipe evaporator.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2015, 128; 59-72
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigating of a wide range of concentrations of multi-walled carbon nanotubes on germination and growth of castor seeds (Ricinus communis L.)
    Autorzy:
    Fathi, Z.
    Khavari Nejad, R.-A.
    Mahmoodzadeh, H.
    Satari, T.N.
    Powiązania:
    https://bibliotekanauki.pl/articles/65867.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    concentration
    multi-walled carbon nanotube
    germination
    growth
    castor oil
    seed
    Ricinus communis
    Euphorbiaceae
    Opis:
    Carbon nanotubes act as regulators of plant germination and growth and are able to change the morphology and physiology of plant cells. The castor plant (Ricinus communis L.) belongs to the Euphorbiaceae family and is a very important medicinal plant. The aim of this study was to investigate the effect of 10 different concentrations of multi-walled carbon nanotubes (MWCNTs) (2, 5, 10, 20, 50, 75, 100, 125, 250 and 500 μg · ml–1) alongside the control under laboratory conditions on the germination and growth of castor seedlings. The results demonstrated that the maximum percentage of germination (96.7%) and relative germination percentage (100%) were found in the concentrations of 50 and 100 μg · ml–1, respectively, and the highest germination rate (53.3%) and the mean germination time (4.6 days) was seen in the concentration of 75 μg · ml–1. However, no statistically significant differences were found between the different concentrations in any of the germination factors. In the concentration of 100 μg · ml–1, there was a significant increase in the seedling vigor index I (400) when compared with the concentrations of 5 and 10 μg · ml–1. The maximum seedling vigor index II (11.3) was found in the concentration of 100 μg · ml–1 and was significantly different from the control and all applied concentrations. The length of radicle in the 100 and 125 μg · ml–1 had a significant increase when compared with the control and the concentrations of 10 and 50 μg · ml–1. The maximum seedling length (4.6 cm) was seen in the concentration of 100 μg · ml–1 where there was a significant increase with 10 μg · ml–1. Moreover, in the 100 μg · ml–1 concentration, the largest number of rootlets (8.6) was seen and when compared with the control and concentrations of 5, 10 and 50 μg · ml–1, there was a statistically significant increase. The maximum wet weight (0.3 g) and dry weight (0.1 g) of seedlings were obtained in the concentration of 100 μg · ml–1 and when compared with the control, there was a significant increase. It was found that in all factors related to the growth of seedlings, the concentrations of 10 and 50 MWCNTs had an inhibitory effect on the response index. The MWCNTs concentration of 100 μg · ml–1 was considered as the optimum concentration in the growth stage of castor seedlings.
    Źródło:
    Journal of Plant Protection Research; 2017, 57, 3
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magneto-thermo-mechanical buckling analysis of Mindlin plate reinforced with FG-carbon nanotubes
    Analiza magnetyczno-termo-mechaniczna wyboczenia płyty Mindlina wzmacnianej nanorurkami o funkcyjnej gradacji
    Autorzy:
    Kolahchi, R.
    Esmailpour, M.
    Safari, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/230395.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wyboczenie
    pole magnetyczne
    nanorurka węglowa
    FG-SWCNT
    wpływ temperatury
    płyta Mindlina
    buckling
    magnetic field
    carbon nanotube
    temperature effect
    Mindlin plate
    Opis:
    A buckling analysis of temperature-dependent embedded plates reinforced by single-walled carbon nanotubes (SWCNTs) subjected to a magnetic field is investigated. The SWCNTs are distributed as uniform (UD) and three types of functionally graded nanotubes (FG), in which the material properties of the nano-composite plate are estimated based on the mixture rule. The surrounding temperature-dependent elastic medium is simulated as Pasternak foundation. Based on the orthotropic Mindlin plate theory, the governing equations are derived using Hamilton's principle. The buckling load of the structure is calculated based on an exact solution by the Navier method. The influences of elastic medium, magnetic field, temperature and distribution type, and volume fractions of SWCNT are shown on the buckling of the plate. Results indicate that CNT distribution close to the top and bottom are more efficient than that distributed near the mid-plane for increasing the stiffness of the plates.
    Badana jest analiza wyboczenia wbudowanych płyt zależnych od temperatury wzmacnianych jednościennymi nanorurkami węglowymi (SWCNT) poddawanych polu magnetycznemu. Nanorurki SWCNT są rozpowszechniane jako jednolite (UD), a także istnieją trzy typy rozmieszczenia FG (FGA, FGO, FGX). W celu uzyskania równoważnych właściwości materiałowych nanokompozytów dwufazowych (tj. polimer jako matryca i nanorurka węglowa jako wzmocnienie), stosuje się zasadę mieszaniny. Do modelowania matematycznego obecnej struktury stosuje ortotropową teorię płyty Mindlina. W tej teorii odkształcenie normalne i przy ścinaniu są rozpatrywane w kategoriach przemieszczenia punktu materiału na płaszczyźnie środkowej i obrotów normalnej i środkowej płaszczyzny w kierunku osi X i Y. W celu uzyskania obowiązujących równań, stosowana jest metoda energetyczna i zasada Hamiltona. Całkowita energia potencjalna płytki CNTRC to suma energii odkształcenia i pracy wykonanej przez ośrodek elastomerowy i pole magnetyczne. W przypadku energii odkształcenia, zależności przemieszczania w wyniku naprężenia są definiowane w celu uproszczenia. Ośrodek sprężysty zależny od temperatury otoczenia jest stymulowany jako podłoże Pasternaka ze stałą sprężyny i ścinania. Ponieważ ośrodek elastomerowy jest stosunkowo miękki, zakłada się, że sztywność fundamentu jest zależna od temperatury. Ponadto, w przypadku płytki poddawanej stałemu polu magnetycznemu, bierze się pod uwagę przyłożoną siłę masową oraz ocenia się elementy siły Lorentza na jednostkę płytki. Na koniec, korzystając z zasady Hamiltona i integrując wg części, uzyskuje się obowiązujące równania w zakresie wypadkowych naprężeń. Następnie, obliczając wypadkową naprężenia pod względem przemieszczenia i obrotów, uzyskuje się ostateczną formę obowiązujących równań.
    Źródło:
    Archives of Civil Engineering; 2016, 62, 3; 89-104
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of selected aspects of a tank gassing-up process on board liquefied petroleum gas carrier. Part I
    Autorzy:
    Wieczorek, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1845464.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    convective heat transfer
    Reynolds number
    nanofluid
    single
    wall
    carbon
    nanotube
    SWCNT
    laminar flow
    Opis:
    The paper is a thermodynamics analysis of the removal of any inert gas from the tank using the vapors of any liquefied petroleum gas cargo (called cargo tank gassing-up operation). For this purpose, a thermodynamic model was created which considers two boundary cases of this process. The first is a ‘piston pushing’ of inert gas using liquefied petroleum gas vapour. The second case is complete mixing of both gases and removal the mixture from the tank to the atmosphere until desired concentration or amount of liquefied petroleum gas cargo in the tank is reached. Calculations make it possible to determine the amount of a gas used to complete the operation and its loss incurred as a result of total mixing of both gases.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 2; 43-58
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical investigation of convective heat transfer of single wall carbon nanotube nanofluid laminar flow inside a circular tube
    Autorzy:
    Saeed, Farqad Rasheed
    Jasim, Marwah A.
    Mahmood, Natheer B.
    Jaffar, Zahraa M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1845470.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    convective heat transfer
    reynolds number
    nanofluid
    single
    wall
    carbon
    nanotube
    SWCNT
    laminar flow
    Opis:
    This study presents the behavior of a single wall carbon nanotube (SWCNT)/water nanofluid for convective laminar flow inside a straight circular pipe heated by a constant heat flux. Five volume fractions of SWCNT were used to investigate their effect on the heat transfer coefficient, Nusselt number, temperature distribution and velocity field in comparison with pure water flow. One model for each property was tested to calculate the effective thermal conductivity, effective dynamic viscosity, and effective specific heat of the SWCNT/water mixture. The models were extracted from experimental data of a previous work. The outcomes indicate that the rheological behavior of SWCNT introduces a special effect on the SWCNT/water properties, which vary with SWCNT volume fraction. The results show an improvement in the heat transfer coefficient with increasing volume fraction of nanoparticles. The velocity of SWCNT/water nanofluid increased by adding SWCNT nanoparticles, and the maximum increase was registered at 0.05% SWCNT volume fraction. The mixture temperature is increased with the axial distance of the pipe but a reduction in temperature distribution is observed with the increasing SWCNT volume fraction, which reflects the effect of thermophysical properties of the mixture.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 2; 103-119
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies