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Wyszukujesz frazę "Singh, Vijay" wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Performance assessment of industrial system (African Textile Manufacturers, LTD) through copula linguistic approach
    Autorzy:
    Abubakar, Muhammad Idris
    Singh, Vijay Vir
    Powiązania:
    https://bibliotekanauki.pl/articles/406421.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    availability
    reliability
    MTTF
    cost analysis
    supplementary variable
    Opis:
    This paper deals with the performance assessment of a textile industry, namely African Textile Manufactures (ATM) Ltd., in Chalawa, Kano industrial estate, Federal Republic of Nigeria. The entire system ATM has different sections of machines for processing various assignments. The machines in the sections have diverse capabilities. We assumed the following subsystems: spinning, weaving, pretreatment, printing, and steaming. The failure rates of subsystems are constant, and they follow exponential distribution, while the repairs follow two types of distributions, namely general distribution and Gumbel–Hougaard family copula distribution. The system analyzed by employing supplementary variable and the Laplace transform. Various measures of reliability have been computed for differential values of failures and two types of repair. The conclusions and some recommendations are addressed to improving the management of ATM.
    Źródło:
    Operations Research and Decisions; 2019, 29, 4; 5-22
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Classification and detection of skin disease based on machine learning and image processing evolutionary models
    Autorzy:
    Bordoloi, Dibyahash
    Singh, Vijay
    Kaliyaperumal, Karthikeyan
    Ritonga, Mahyudin
    Jawarneh, Malik
    Kassanuk, Thanwamas
    Quiñonez-Choquecota, Jose
    Powiązania:
    https://bibliotekanauki.pl/articles/38700501.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Podstawowych Problemów Techniki PAN
    Tematy:
    skin disorder
    machine learning
    classification
    image enhancement
    image segmentation
    disease detection
    schorzenie skóry
    nauczanie maszynowe
    klasyfikacja
    ulepszenie obrazu
    segmentacja obrazów
    wykrywanie choroby
    Opis:
    Skin disorders, a prevalent cause of illnesses, may be identified by studying their physical structure and history of the condition. Currently, skin diseases are diagnosed using invasive procedures such as clinical examination and histology. The examinations are quite effective and beneficial. This paper describes an evolutionary model for skin disease classification and detection based on machine learning and image processing. This model integrates image preprocessing, image augmentation, segmentation, and machine learning algorithms. The experimental investigation makes use of a dermatology data set. The model employs the machine learning methods: the support vector machine (SVM), the k-nearest neighbors (KNN), and random forest algorithms for image categorization and detection. This suggested methodology is beneficial for the accurate identification of skin disease using image analysis. The SVM algorithm achieved an accuracy of 98.8%. The KNN algorithm achieved a sensitivity of 91%. The specificity of KNN was 99%.
    Źródło:
    Computer Assisted Methods in Engineering and Science; 2023, 30, 2; 247-256
    2299-3649
    Pojawia się w:
    Computer Assisted Methods in Engineering and Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of Signal Processing Unit for Laser Range Finder
    Autorzy:
    Singh, Ran Vijay
    Chack, Devendra
    Kumar, Sushil
    Powiązania:
    https://bibliotekanauki.pl/articles/1075559.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    CFAR detector
    Laser Range Finder
    PLMS Filter
    Opis:
    Detection of the range of a target using laser range finders requires filtering of incoming data in real-time which can be achieved by a dedicated hardware to meet demanding time requirements. In this paper efficient filter structure which is the combination of constant false alarm rate (CFAR) and pipelined least mean square (LMS) adaptive filtering technique used to create solution for various adaptive filtering problems. Cell averaging (CA) CFAR and automatic censored cell averaging (ACCA) CFAR algorithm are fused separately with the adaptive filter in order to filter the incoming signal so that the detection of the of a target can be achieved through peak detection unit and accordingly range can be calculated. The design with CA-CFAR fused with PLMS filter is synthesized and implemented on a Xilinx Virtex4 FPGA with 32 MHz clock using Xilinx ISE software. Other design with ACCA-CFAR combined with PLMS filter is modeled and simulated in MATLAB simulink.
    Źródło:
    World Scientific News; 2019, 121; 48-58
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of some physical properties of date palm fruits (cv. Khadrawy and Medjool)
    Określenie niektórych właściwości fizycznych owoców palmy daktylowej (odm. khadrawy i Medjool)
    Autorzy:
    Kumar Mahawar, Manoj
    Jalgaonkar, Kirti
    Kumar, Mukesh
    Singh Meena, Vijay
    Bhushan, Bharat
    Powiązania:
    https://bibliotekanauki.pl/articles/1506299.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    date palm
    physical properties
    Khadrawy
    Medjool
    palma daktylowa
    właściwości fizyczne
    Opis:
    The present investigation was carried out to evaluate some physical properties of date palm fruits cv. Khadrawy and Medjool. Pulp moisture content, seed moisture content, fruit dimensions (Major and minor intercept), arithmetic mean diameter, geometric mean diameter, sphericity, colour values (L, a, b), bulk density, true density, porosity and coefficient of static friction were determined for both the varieties. The determined properties had significant difference in their values which may be due to the distinctive features of both the varieties.
    Przedstawione badania zostały przeprowadzone w celu oceny niektórych właściwości fizycznych owoców palmy daktylowej odmian Khadrawy i Medjool. Dla obydwu odmian oceniano wilgotność miąższu, wilgotność nasion, wymiary owoców (wielka i mała oś), średnią arytmetyczną średnicę, średnią geometryczną średnicę, kołowość, wartości barwy (L, a, b), gęstość usypową, gęstość rzeczywistą, porowatość i współczynnik tarcia statycznego. Wartości badanych właściwości wykazywały znaczące różnice międzyodmianowe, które mogły wynikać z cech charakterystycznych obydwu odmian.
    Źródło:
    Acta Agrophysica; 2017, 24, 2; 271-277
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic analysis of combined ORC-VCR system with recuperator and reheater
    Autorzy:
    Rawat, Kamal Singh
    Bhandari, Prabhakar
    Bisht, Vijay Singh
    Powiązania:
    https://bibliotekanauki.pl/articles/2142837.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    low grade energy
    organic Rankine cycle
    refrigeration
    hydrocarbons
    recuperator
    reheaters
    energia
    ORC
    organiczny obieg Rankine'a
    chłodzenie
    węglowodory
    rekuperator
    nagrzewnica
    Opis:
    The trend of utilization of low-grade thermal energy gain huge attention due to increase in energy demand and depletion of conventional resources of energy. Low grade energy can be used in ORC-VCR cycle for refrigeration purpose. In the present work, to improve the performance a modified ORC-VCR cycle, recuperator and reheater are integrated in the cycle. The thermodynamic analysis of the modified system has been conducted with R600a, R600, R290 and R1270 as working fluids under various operating conditions viz. evaporator temperature, condenser temperature, boiler exit temperature. Different parameters evaluated to assess the performance are overall COP, mass flow rate per kW cooling capacity, expansion ratio and compression ratio. From the analysis, butane is found as a best choice for the modified ORC–VCR cycle. It was found that for the modified ORC-VCR cycle at boiler exit temperature of 90°C and condenser temperature 40°C has system COP of 0.5542 with butane, which is 7.1% and 18% higher than that of ORC-VCR cycle with recuperator and simple ORC-VCR cycle, respectively.
    Źródło:
    Acta Innovations; 2022, 44; 34-44
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of D-shaped, reverse D-shaped and U-shaped turbulators in solar air heater on thermo-hydraulic performance
    Autorzy:
    Ghildyal, Abhishek
    Bisht, Vijay Singh
    Bhandari, Prabhakar
    Rawat, Kamal Singh
    Powiązania:
    https://bibliotekanauki.pl/articles/27312225.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    CFD
    renewable energy
    solar air heater
    turbulence kinetic energy
    thermo-hydraulic performance
    Opis:
    As the cost of fuel rises, designing efficient solar air heaters (SAH) becomes increasingly important. By artificially roughening the absorber plate, solar air heaters’ performance can be augmented. Turbulators in different forms like ribs, delta winglets, vortex generators, etc. have been introduced to create local wall turbulence or for vortex generation. In the present work, a numerical investigation on a solar air heater has been conducted to examine the effect of three distinct turbulators (namely D-shaped, reverse D- and U-shaped) on the SAH thermo-hydraulic performance. The simulation has been carried out using the computational fluid dynamics, an advanced and modern simulation technique for Reynolds numbers ranging from 4000 to 18000 (turbulent airflow). For the purpose of comparison, constant ratios of turbulator height/hydraulic diameter and pitch/turbulator height, of 0.021 and 14.28, respectively, were adopted for all SAH configurations. Furthermore, the fluid flow has also been analyzed using turbulence kinetic energy and velocity contours. It was observed that the U-shaped turbulator has the highest value of Nusselt number followed by D-shaped and reverse D-shaped turbulators. However, in terms of friction factor, the D-shaped configuration has the highest value followed by reverse D-shaped and U-shaped geometries. It can be concluded that among all SAH configurations considered, the U-shaped has outperformed in terms of thermohydraulic performance factor.
    Źródło:
    Archives of Thermodynamics; 2023, 44, 2; 3--20
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical study of car radiator using dimple roughness and nanofluid
    Autorzy:
    Thapa, Robin Kumar
    Bisht, Vijay Singh
    Bhandari, Prabhakar
    Rawat, Kamal Singh
    Powiązania:
    https://bibliotekanauki.pl/articles/2134933.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heat transfer
    augmentation
    nanofluid
    pumping power
    car radiator
    artificial roughness
    Opis:
    Thermal augmentation in flat tube of car radiator using different nanofluids has been performed more often, but use of artificial roughness has been seldom done. Artificial roughness in the form of dimple is used in the present research work. Present study shows the impact of dimple shaped roughness and nanofluid (Al2O3/pure water) on the performance of car radiator. The pitch of dimples is kept at 15 mm (constant) for all the studies performed. The Reynolds number of the flow is selected in the turbulent regime ranging from 9350 to 23 000 and the concentration of the nanofluid is taken in the range of 0.1–1%. It has been found that the heat transfer rate has improved significantly in dimpled radiator tube on the expense of pumping power. Furthermore, the heat transfer rate also increases with increase in nanoparticle concentration from 0.1% to 1.0%. The highest heat transfer enhancement of 79% is observed at Reynolds number 9350, while least enhancement of 18% is observed for Reynolds number of 23 000.
    Źródło:
    Archives of Thermodynamics; 2022, 43, 3; 125--140
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Different Conditions on the Tensile Properties of AA7075-T6 During the Friction Stir Welding Process
    Autorzy:
    Sharma, Akash
    Dwivedi, Vijay Kumar
    Singh, Yesh Pal
    Powiązania:
    https://bibliotekanauki.pl/articles/28099543.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    tensile strength
    aluminum alloy 7075
    Taguchi Technique
    microstructure
    FSW
    Opis:
    In this paper the investigation of the FSW result characteristics on AA7075-T6 of the highest grade is carried out using different process parameters. A vertical milling machine with different FSW tool geometry is used to weld AA7075. When the tool rotational speed varies from 1200 and 1800 (rpm), different welding parameters are studied, the plunge depth of tool is between 0.14 and 0.20 mm, the table transverse speed range is between 20 and 50 (mm/min) and the tool shoulder diameter was 20 mm. The welding settings are optimized using the Taguchi approach. In this experimental investigation Taguchi Technique is utilized in this study to optimize three factorial and three level designs. The results show that when the rotating speed increases, the UTS of the welded joint increases, whereas the tensile strength of the welded joint decreases resulting to frictional heat created during the FSW process. Tensile strength decreases as feed increases and increases as rotational speed increases. For a 5 mm thick plate, tensile strength is optimal with a tool shoulder diameter of 20 mm, a rotational speed of 1600 rpm, feed rate of 30 mm/min and plunge depth. The shoulder diameter of 20 mm provides the maximum ultimate tensile strength when it is compared with all other tool shoulder diameter. The Al alloy AA7075-T6 plates, however, concurrently developed an equiaxial grain structure with a substantially smaller grain size and coarsened the precipitates.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 2; 813--821
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economic analysis of artificially roughened solar air heater with v-shaped ribs
    Autorzy:
    Bahuguna, Rahul
    Chamoli, Sunil
    Barthwal, Yogesh
    Rana, Sumit
    Gupta, Ashutosh
    Bisht, Vijay Singh
    Powiązania:
    https://bibliotekanauki.pl/articles/2142836.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    solar air heater
    heat transfer
    artificial roughness
    economic analysis
    life cycle savings
    powietrzny kolektor słoneczny
    wymiana ciepła
    sztuczna chropowatość
    analiza ekonomiczna
    oszczędności w cyklu życia
    Opis:
    Due to the minimal transfer of heat from absorber plate to moving air in the duct, solar air heaters have low performance. One of the procedures to augment the heat transfer by substantial amount is by utilizing artificial roughness, by which the performance can be improved considerably. In this study, an economic investigation of solar air heater embedded with artificial roughness is accomplished numerically employing v-shaped roughness, with the objective of optimising life cycle solar savings. The non-dimensional parameters of roughness, namely, angle of attack (α), roughness pitch (p/e) and roughness height (e/Dh) are examined by varying temperature rise over the solar air heater (∆T) and solar radiations (I) for different economic parameters values i.e., cost of collector, cost of roughness elements, and cost of conventional fuel.
    Źródło:
    Acta Innovations; 2022, 44; 18-33
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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