Autor: Kumar, Suresh - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A Comparative Study on Ballistic Behaviour of MWCNT / Graphene Reinforced AL6061 Surface Composites Fabricated Via Friction Stir Processing
Autorzy:: Magarajan, U.
Suresh Kumar, S.
Powiązania:: https://bibliotekanauki.pl/articles/27324483.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: ballistic behaviour
friction stir processing
graphene
Multi Walled Carbon Nano Tubes
depth of penetration
Opis:: In this work, a comparative study on the ballistic behaviour of friction stir processed AL6061 targets had been made. Base Metal AL6061 (BM) plates with 25 mm thickness were friction stir processed by adding Multi Walled Carbon Nano Tubes (MWCNT) and Graphene (G), producing AL6061-MWCNT and AL6061-G surface composites. Optical microscopy and microhardness test on BM, AL6061-MWCNT and AL6061-G samples were performed as per the standard procedure. It was noticed that uniform dispersion of ceramic particles and refined grains were obtained for the friction stir processed surface composites. From the microhardness test, it was perceived that friction stir processing had induced strengthening of surface composites, hence increasing the microhardness of AL6061-MWCNT and AL6061-G by ~60.3% and ~73.6% respectively. Also, ballistic experiments were conducted at 680±10 m/s by impacting Ø7.62×51 mm projectiles. AL6063 backing plates were placed to compare the ballistic behaviours AL6061-MWCNT and AL6061-G targets by depth of penetration. It was noted that the depth of penetration of AL6061-MWCNT and AL6061-G targets were 37.81% and 65.84% lesser than the BM target. Further, from the results of Post ballistic microscopy it was observed that the microstructure near and away from the penetration channel edge looks unchanged in BM target. However, the AL6061-MWCNT and AL6061-G targets showed considerable change in their morphology, by forming Adiabatic Shear Bands.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 2; 541--550
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of solar cooker with thermal storage for remote hilly areas: determination of heating and cooling characteristic time
Autorzy:: Raghav, Geetanjali
Sharma, Pankaj Kumar
Kumar, Suresh
Maithani, Rajesh
Iung, Alexis
Quentin, Mercier
Powiązania:: https://bibliotekanauki.pl/articles/2142896.pdf
Data publikacji:: 2021
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Tematy:: solar energy
solar cookers
thermal storage
thermal performance
energia słoneczna
kuchenka słoneczna
magazynowanie ciepła
wydajność cieplna
Opis:: Solar cooking finds a major application in rural areas of Uttarakhand, India, yet its utilization is still limited due to certain limitation such as intermittent nature of solar radiations. This drawback limits solar cooker in becoming a viable alternate solution of LPG and other pollution causing resources such as wood. In order to cater this problem a numerical analysis of box type solar cooker with storage is carried out. The energy stored in the storage material will keep the cooker warm up to the time when food is consumed. Charging and discharging time analysis is performed in with an aim to understand the effect of storage on solar cooker. Heating and cooling characteristic time are being evaluated and analysed with storage. Thermal performance of box type solar cooker is measured in terms of figures of merit according to BIS standards. The effect of storage has also been analysed in terms of charging and discharging time and first figure of merit of box type solar cooker.it has been observed that during discharging the heat is stored for more duration as compared to the charging time as discharge time is approx. 4-5 hours while charging time for the same amount of insolation is around 3-4 hours.
Źródło:: Acta Innovations; 2021, 40; 5-18
2300-5599
Pojawia się w:: Acta Innovations
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Biopolymers as renewable polymeric materials for sustainable development : an overview
Biopolimery jako odnawialne materiały polimerowe dla zrównoważonego rozwoju : przegląd literatury
Autorzy:: Srivastava, Abhinav
Srivastava, Atul Kumar
Singh, Ashutosh
Singh, Priti
Verma, Sangeeta
Vats, Monika
Sagadevan, Suresh
Powiązania:: https://bibliotekanauki.pl/articles/2120222.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: biopolymers
biocompatibility
biodegradability
biopolimery
biokompatybilność
biodegradowalność
Opis:: Based on the review of 115 literature items, the article presents biopolymers as renewable polymer materials for sustainable development. The types of biopolymers and their applications are discussed, including biopolymers based on starch, cellulose, bacteria, soy and natural polyester. It also describes the issues of biocompatibility, the principles of sustainable chemistry and sustainable development, as well as market trends and future application directions.
Na podstawie przeglądu 115 pozycji literaturowych w artykule przedstawiono biopolimery jako odnawialne materiały polimerowe dla zrównoważonego rozwoju. Omówiono rodzaje biopolimerów i ich zastosowanie, w tym biopolimery na bazie skrobi, celulozy, bakterii, soi i naturalnego poliestru. Opisano również zagadnienia dotyczące biokompatybilności, zasad zrównoważonej chemii i zrównoważonego rozwoju oraz trendy rynkowe i perspektywiczne kierunki zastosowań.
Źródło:: Polimery; 2022, 67, 5; 185--196
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Determination of moxifloxacin hydrochloride in AVELOX pharmacological formulations using modified potentiometer sensors
Oznaczanie chlorowodorku moksyfloksacyny w formulacjach farmakologicznych AVELOX przy użyciu zmodyfikowanych czujników potencjometrycznych
Autorzy:: Kumar, Sachin
Sindhu, Sushil K.
Kumar, Praveen
Sharma, Amit
Sagadevan, Suresh
Powiązania:: https://bibliotekanauki.pl/articles/2088258.pdf
Data publikacji:: 2021
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: AVELOX
moxifloxacin HCL
ion-selective electrodes
sodium tetraphenylborate
phosphomolybdic acid
phosphotungstic acid
poly(vinyl chloride)
potentiometry
moksyfloksacyna HCL
elektrody jonoselektywne
tetrafenyloboran sodu
kwas fosfomolibdenowy
kwas fosfowolframowy
poli(chlorek winylu)
potencjometria
Opis:: Three different carbon paste (CP), silk-screen (SP) and poly (vinyl chloride) (PVC) modified electrodes were obtained to verify the reliability of AVELOX, the generic name of which is Moxifloxacin HCl (AV-MOXH). The sensing membranes were containing AVELOX ion associated complexes with sodium tetraphenylborate (NaTPB), phosphomolybdic acid (PMA), phosphotungstic acid (PTA), and ammonium reineckate (RN) as electroactive materials. All three electrodes gave fast, viable, and near-Nernstian linear responses over a relative wide concentration range that ranged from 1.010-6 to 1.010-2 mol/L AV-MOXH at 25°C with a monovalent cationic decrease. The sensors demonstrated a good discernment of AV-MOXH from numerous inorganic and organic compounds such as glucose, sucrose, Na+, Ca+, etc. Additionally, the isothermal coefficients along with selectivity coefficients were calculated. The modified Screen Printed Electrode sensor appeared to be highly sensitive for the determination of AV-MOXH. The electrode response was observed in pH range 2–6 for ISPE electrodes and IPVC electrodes and 3–7 for ICPE electrodes under various temperature conditions. The short response time, lifetime validity, recovery, and all the methods of validation such as limit of detection and limit of quantification were estimated. The potentiometric method turned out to be suitable for determining AV-MOXH in pharmacological formulations, and the findings obtained are comparable to the “HPLC official method” in terms of the agreement. As a result, the postulated potentiometric approach was verified in accordance with IUPAC guidelines.
Otrzymano trzy różne elektrody modyfikowane pastą węglową (CP), sitodrukiem (SP) i polichlorkiem winylu (PVC), w celu oceny skuteczności działania leku AVELOX (nazwa rodzajowa Moxifloxacin HCl, AV-MOXH). Membrany czujników zawierały kompleksy jonu AVELOX z tetrafenyloboranem sodu (NaTPB), kwasem fosfomolibdenowym (PMA), kwasem fosfowolframowym (PTA) i soli Reineckego (RN) jako materiałami elektroaktywnymi. Wszystkie trzy elektrody dały szybkie i bliskie zależności liniowe Nernsta w zakresie stężeń AV-MOXH od 1.0-10-6 do 1.0-10-2 mol/l (w 25°C). Elektrody wykazały dobrą selektywność w oznaczaniu AV-MOXH względem wielu jonów i związków organicznych i nieorganicznych, jak glukoza, sacharoza, Na+, Ca+ itp. Dodatkowo obliczono współczynniki izotermiczne oraz współczynniki selektywności. Zmodyfikowany czujnik z elektrodą sitodrukową okazał się być bardzo czuły do oznaczania AV-MOXH. Badania prowadzono w zakresie pH 2–6 w przypadku elektrod ISPE i IPVC oraz 3–7 w przypadku elektrod ICPE w różnych temperaturach. Oszacowano czas odpowiedzi elektrod, ich czas życia, możliwość regeneracji, odzysk oraz granicę wykrywalności i granicę oznaczalności. Metoda potencjometryczna okazała się być odpowiednia do oznaczania AV-MOXH w preparatach farmakologicznych, a uzyskane wyniki są porównywalne z „oficjalną metodą HPLC”.
Źródło:: Polimery; 2021, 66, 11-12; 589--601
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Dynamical properties of a modified chaotic Colpitts oscillator with triangular wave non-linearity
Autorzy:: Suresh, Rasappan
Sathish Kumar, Kumaravel
Regan, Murugesan
Niranjan Kumar, K. A.
Narmada Devi, R.
Obaid, Ahmed J.
Powiązania:: https://bibliotekanauki.pl/articles/27312004.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: chaos
Colpitts oscillator
Lyapunov exponent
diffusion
stability
synchronization
triangular wave non-linearity
Opis:: The purpose of this paper is to introduce a new chaotic oscillator. Although different chaotic systems have been formulated by earlier researchers, only a few chaotic systems exhibit chaotic behaviour. In this work, a new chaotic system with chaotic attractor is introduced for triangular wave non-linearity. It is worth noting that this striking phenomenon rarely occurs in respect of chaotic systems. The system proposed in this paper has been realized with numerical simulation. The results emanating from the numerical simulation indicate the feasibility of the proposed chaotic system. More over, chaos control, stability, diffusion and synchronization of such a system have been dealt with.
Źródło:: Archives of Control Sciences; 2023, 33, 1; 25--53
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Dynamics, control, stability, diffusion and synchronization of modified chaotic Colpitts oscillator
Autorzy:: Rasappan, Suresh
Niranjan Kumar, K. A.
Powiązania:: https://bibliotekanauki.pl/articles/1845536.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chaos
Colpitts oscillator
Lyapunov exponent
diffusion
stability
synchronization
Opis:: The purpose of this paper is to introduce a new chaotic oscillator. Although different chaotic systems have been formulated by earlier researchers, only a few chaotic systems exhibit chaotic behaviour. In this work, a new chaotic system with chaotic attractor is introduced. It is worth noting that this striking phenomenon rarely occurs in respect of chaotic systems. The system proposed in this paper has been realized with numerical simulation. The results emanating from the numerical simulation indicate the feasibility of the proposed chaotic system. More over, chaos control, stability, diffusion and synchronization of such a system have been dealt with.
Źródło:: Archives of Control Sciences; 2021, 31, 3; 731-759
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Dynamics, control, stability, diffusion and synchronization of modified chaotic Colpitts oscillator
Autorzy:: Rasappan, Suresh
Niranjan Kumar, K. A.
Powiązania:: https://bibliotekanauki.pl/articles/1845526.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chaos
Colpitts oscillator
Lyapunov exponent
diffusion
stability
synchronization
Opis:: The purpose of this paper is to introduce a new chaotic oscillator. Although different chaotic systems have been formulated by earlier researchers, only a few chaotic systems exhibit chaotic behaviour. In this work, a new chaotic system with chaotic attractor is introduced. It is worth noting that this striking phenomenon rarely occurs in respect of chaotic systems. The system proposed in this paper has been realized with numerical simulation. The results emanating from the numerical simulation indicate the feasibility of the proposed chaotic system. More over, chaos control, stability, diffusion and synchronization of such a system have been dealt with.
Źródło:: Archives of Control Sciences; 2021, 31, 3; 731-759
1230-2384
Pojawia się w:: Archives of Control Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effects of Integrated Therapeutic Exercises on Pain and Disability in Medial Knee Osteoarthritis
Autorzy:: Raghav, Sumit
Singh, Anshika
Mani, Suresh
Srivastava, Anirudh
Kumar, Mukul
Powiązania:: https://bibliotekanauki.pl/articles/28761968.pdf
Data publikacji:: 2023
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: knee osteoarthritis
integrated exercises
pain
disability
Opis:: The purpose of this study was to compare the effect of quadriceps isometric exercises along with hip abductors isometric exercises as integrated exercise with quadriceps exercises in reducing pain, disability in medial knee osteoarthritis. The Total of 54 patients (both male and female) were recruited in this study but on the basis of inclusion and exclusion criteria, only 32 were included in this study. Womac index was opted as outcome measures to collect the data of pain, disability and functional limitation. Participants were randomly assigned to integrated exercise group; (n = 16) (mean age 52) who performed exercises [Quadriceps isometric along with hip abductor isometric exercises] and quadriceps isometric exercises group (n = 16) (mean age 49) performed for 3 weeks. 32 patients were analyzed and the effect of integrated exercises [Quadriceps isometric along with hip abductor isometric exercises] showed a statistically significant difference in pain, disability and functional limitation (p < 0.000). Total duration to collect the pre and post data of pain, disability and functional limitation was 3 weeks. 3 weeks of exercise protocol was effective in both groups in terms of reducing pain and disability but integrated exercises were found to be more effective than quadriceps exercise in improving the pain, disability and functional limitation over the time at the level of significance.
Źródło:: Central European Journal of Sport Sciences and Medicine; 2023, 44; 55-62
2300-9705
2353-2807
Pojawia się w:: Central European Journal of Sport Sciences and Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Energetic & exergetic analysis of a parabolic trough: concentrated solar power plant
Autorzy:: Nagpal, Mohit
Maithani, Rajesh
Kumar, Suresh
Powiązania:: https://bibliotekanauki.pl/articles/2142893.pdf
Data publikacji:: 2021
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Tematy:: solar energy
exergy
thermal efficiency
heat gain
heat losses
parabolic trough
collectors
energia słoneczna
egzergia
wydajność termiczna
zyski ciepła
straty ciepła
kolektory
Opis:: Solar energy is the most affordable source of energy. Parabolic trough systems are used to concentrate and extract heat, therefore it’s very significant to analyse its performance in terms of energy and exergy. Exergy based analysis of the system ensures the eradication of losses, resulting in the yield of energy of the highest quality. In this paper, an investigation has been carried out using numerical simulation with an objective of analysis of Parabolic Trough Collectors on the basis of energy and exergy. Detailed second law analysis has been performed by varying the system and operating parameters through computer simulation. Exergy output has been determined by analysing the effect of major system parameters, namely, mirror reflectivity, glass transmissivity, absorptivity, the diameter of glass envelop, and the receiver. The operating parameters considered in the investigation are insolation and temperature rise parameters. The extensive investigation of the parabolic trough of a concentrated solar power plant for various design parameters in the range of operating parameters reveals that it is beneficial to operate the system at higher temperature as opposed to the preference of the operating system at lower temperature from purely thermal considerations.
Źródło:: Acta Innovations; 2021, 40; 19-30
2300-5599
Pojawia się w:: Acta Innovations
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Experimental and finite element studies on free vibration of skew plates
Autorzy:: Srinivasa, C. V.
Suresh, Y. J.
Prema Kumar, W. P.
Powiązania:: https://bibliotekanauki.pl/articles/955136.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: laminat
analiza elementów skończonych
płyta kompozytowa
częstotliwość drgań
skew plates
antisymmetric laminates
free vibration
experimental method
finite element analysis
Opis:: The present paper deals with the experimental studies carried out on free vibration of isotropic and laminated composite skew plates. The natural frequencies were also determined using QUAD8 finite element of MSC/NASTRAN and a comparison was made between the experimental values and the finite element solution. The effects of the skew angle and aspect ratio on the natural frequencies of isotropic skew plates were studied. The effects of the skew angle, aspect ratio, fiber orientation angle and laminate sequence (keeping the number of layers constant) on the natural frequencies of antisymmetric composite laminates were also studied. The experimental values of natural frequencies are in good agreement with the FE solutions. The natural frequencies are found to increase with an increase in the skew angle. The variation of natural frequencies with the aspect ratio is small and negligible both for isotropic and laminated composite skew plates.
Źródło:: International Journal of Applied Mechanics and Engineering; 2014, 19, 2; 365-377
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Finite element studies on free vibration of laminated composite cylindrical skew panels
Autorzy:: Srinivasa, C. V.
Suresh, Y. J.
Prema Kumar, W. P.
Powiązania:: https://bibliotekanauki.pl/articles/955177.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: panel cylindryczny
laminat
wolne wibracje
element skończony
częstotliwość podstawowa
cylindrical skew panel
panel angle
skew angle
antisymmetric laminates
free vibration
finite element
fundamental frequency
Opis:: This paper presents the finite element studies on free vibration of isotropic and laminated composite cylindrical skew panels. The analysis is performed using CQUAD4 and CQUAD8 elements of MSC/NASTRAN. The effects of the panel angle, skew angle, aspect ratio and length-to-thickness-ratio on fundamental frequency of isotropic cylindrical skew panels are studied. The effects of additional parameters such as the fiber orientation angle, numbers of layers and stacking sequence on the fundamental frequency of antisymmetric composite laminates are also studied. It is found that the CQUAD8 element yields better results than the CQUAD4 element in the validation and convergence studies. The CQUAD8 element is employed for the remaining part of the studies. The fundamental frequencies are found to increase with the panel angle and skew angle. When the number of layers in the laminate is large, the variation of the fundamental frequency with the number of layers is not appreciable. The boundary conditions are found to have a significant influence on the fundamental frequency.
Źródło:: International Journal of Applied Mechanics and Engineering; 2014, 19, 1; 165-180
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Genetic diversity among ethiopian coffee (Coffea Arabica L.) collections available in indian gene bank using sequence related amplified polymorphism markers
Autorzy:: Mishra, Manoj Kumar
Nishani, Sandhyarani
Gowda, Madhura
Padmajyothi, Dandamudi
Suresh, Narayana
Sreenath, Hosahalli
Raghuramulu, Y.
Powiązania:: https://bibliotekanauki.pl/articles/2199612.pdf
Data publikacji:: 2014-12-18
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: Coffea arabica L.
Ethiopian germplasm
Fingerprinting
Genetic diversity
SRAP marker
Opis:: The South-Western highlands of Ethiopia are considered to be the centre of origin and diversity of the arabica coffee, Coffea arabica. More than 80 accessions of arabica coffee collected from Ethiopia are avail-able in Indian gene bank. However, the genetic diversity of these accessions is not studied in detail. In the present study, genetic diversity analysis of 48 accessions collected from eight provinces of Ethiopia was car-ried out using Sequence-related amplified Polymorphism (SRAP) marker. Among the thirty two SRAP primer combinations tested, 14 primer pairs were polymorphic and generated 203 distinct fragments. The number of fragments ranged from 7 to 21 with a mean of 14.5 fragments per primer combination. Of the total 203 ampli-fied fragments, 182 (89.65%) were polymorphic and the percent of polymorphism ranged from 53.84% to a maximum of 100% using different primers. The average resolving power (Rp) and average polymorphism information content (PIC) of the 14 SRAP primer combinations was 14.31 and 0.648 respectively. A total of 13 rare alleles were obtained from SRAP assays, of which six rare alleles were obtained from the accessions collected from Shoa province.The UPGMA clustering algorithm from SRAP analysis grouped the 48 coffee accessions into two major clusters. The accessions collected from particular province clustered together which could be attributed to the substantial gene flow between adjacent population and the influence of geographical origin on genetic diver-sity. The study demonstrated the existence of substantial genetic variation in Ethiopian germplasm which could be utilized in coffee germplasm conservation and improvement program.
Źródło:: Plant Breeding and Seed Science; 2014, 70; 29-40
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Impact of Cutting Forces and Chip Microstructure in High Speed Machining of Carbon Fiber - Epoxy Composite Tube
Autorzy:: Allwin Roy, Y.
Gobivel, K.
Vijay Sekar, K. S.
Suresh Kumar, S.
Powiązania:: https://bibliotekanauki.pl/articles/352953.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: composite materials
orthogonal machining
cutting forces
chip microstructure
Opis:: Carbon fiber reinforced polymeric (CFRP) composite materials are widely used in aerospace, automobile and biomedical industries due to their high strength to weight ratio, corrosion resistance and durability. High speed machining (HSM) of CFRP material is needed to study the impact of cutting parameters on cutting forces and chip microstructure which offer vital inputs to the machinability and deformation characteristics of the material. In this work, the orthogonal machining of CFRP was conducted by varying the cutting parameters such as cutting speed and feed rate at high cutting speed/feed rate ranges up to 346 m/min/ 0.446 mm/rev. The impact of the cutting parameters on cutting forces (principal cutting, feed and thrust forces) and chip microstructure were analyzed. A significant impact on thrust forces and chip segmentation pattern was seen at higher feed rates and low cutting speeds.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 3; 1771-1777
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Integer factor based SVPWM approach for multilevel inverters with continuous and discontinuous switching sequences
Autorzy:: Suresh, Kumar Anisetty
Sri, Gowri Kolli
Nagaraja, Rao Sulake
Manjunatha, Budagavi Matam
Sesi, Kiran Ponnapati
Niteesh, Kumar K.
Powiązania:: https://bibliotekanauki.pl/articles/1955193.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: integer factor approach
inverters
multilevel inverters
optimum switching sequence
space vector modulation
SVPWM
metoda współczynnika całkowego
inwertery
inwertery wielopoziomowe
optymalna sekwencja przełączania
modulacja wektora przestrzeni
Opis:: The most extensively employed strategy to control the AC output of power electronic inverters is the pulse width modulation (PWM) strategy. Since three decades modulation hypothesis continues to draw considerable attention and interest of researchers with the aim to reduce harmonic distortion and increased output magnitude for a given switching frequency. Among different PWM techniques space vector modulation (SVM) is very popular. However, as the number of output levels of the multilevel inverter (MLI) increases, the implementation of SVM becomes more difficult, because as the number of levels increases the total number of switches in the inverter increases which will increase the total number of switching states, which will result in increased computational complexity and increased storage requirements of switching states and switching pulse durations. The present work aims at reducing the complexity of implementing the space vector pulse width modulation (SVPWM) technique in multilevel inverters by using a generalized integer factor approach (IFA). The performance of the IFA is tested on a three-level inverter-fed induction motor for conventional PWM (CPWM) which is a continuous SVPWM method employing a 0127 sequence and discontinuous PWM (DPWM) methods viz, DPWMMIN using 012 sequences and DPWMMAX using a 721 sequence.
Źródło:: Archives of Electrical Engineering; 2021, 70, 4; 859-872
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Method of research for solar cookers performance characteristics- analysis and comparison
Autorzy:: Raghav, Geetanjali
Sharma, Pankaj Kumar
Kumar, Suresh
Maithani, Rajesh
Powiązania:: https://bibliotekanauki.pl/articles/1833748.pdf
Data publikacji:: 2021
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Tematy:: solar cookers
cooking
plate temperature
thermal performance
kuchenka słoneczna
gotowanie
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Opis:: Cooking is one of the most common activity in day-to-day life of every woman. In rural areas the transportation of fuel is major problem and the increasing demand of energy for cooking applications is gaining importance and various investigations are being carried out for performance enhancement of the solar cooker. The box-type solar cooker has a complex thermal analysis due to the transient heat transfer phenomenon involved in three dimensions. A comparison of the standard correlation available are analysed for accuracy of predicted results with experimental data. The investigation involves the experimental determination of the parameters viz. wind heat transfer coefficient, side and bottom loss coefficient, inner and outer glass temperature. The extensive data is analysed with that of standard correlations and the significance of the experimental data is checked. Analysis found to have deviation of 3%-20% in experimental and correlation data, which indicates that for accuracy of performance analysis the studied parameters should be determined experimentally.
Źródło:: Acta Innovations; 2021, 39; 54--66
2300-5599
Pojawia się w:: Acta Innovations
Dostawca treści:: Biblioteka Nauki

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Wyszukujesz frazę "Kumar, Suresh" wg kryterium: Autor

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