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Wyszukujesz frazę "Garg, N." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Fuzzy TOPSIS Approach in Selection of Optimal Noise Barrier for Traffic Noise Abatement
    Autorzy:
    Garg, N.
    Vishesh, Vishesh
    Maji, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/950220.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fuzzy TOPSIS
    MADM
    road traffic noise
    fuzzy positive ideal solution (FPIS)
    fuzzy negative ideal solution (FNIS)
    SWOT analysis
    Opis:
    The paper presents a retrospective study for selection of noise barrier for road traffic noise abatement. The work proposes the application of Fuzzy TOPSIS (Technique for order preference by similarity to an ideal solution) approach is selection of optimal road traffic noise barrier. The present work utilizes the fuzzy TOPSIS model proposed by Mahdavi et al. (2008) in determination of ranking order of various types of noise barriers with respect to the various criteria considered. It is suggested that application of this approach can be very helpful in selection and application of optimal noise barrier for road traffic noise abatement.
    Źródło:
    Archives of Acoustics; 2015, 40, 4; 453--467
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of Sound Insulation of Sandwich Partition Panels by Means of Artificial Neural Networks
    Autorzy:
    Garg, N.
    Dhruw, S.
    Gandhi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/176461.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    weighted sound reduction index
    Rw
    Sound Transmission Class
    STC
    Opis:
    The paper presents the application of Artificial Neural Networks (ANN) in predicting sound insulation through multi-layered sandwich gypsum partition panels. The objective of the work is to develop an Artificial Neural Network (ANN) model to estimate the Rw and STC value of sandwich gypsum constructions. The experimental results reported by National Research Council, Canada for Gypsum board walls (Halliwell et al., 1998) were utilized to develop the model. A multilayer feed-forward approach comprising of 13 input parameters was developed for predicting the Rw and STC value of sandwich gypsum constructions. The Levenberg-Marquardt optimization technique has been used to update the weights in back-propagation algorithm. The presented approach could be very useful for design and optimization of acoustic performance of new sandwich partition panels providing higher sound insulation. The developed ANN model shows a prediction error of ± 3 dB or points with a confidence level higher than 95%.
    Źródło:
    Archives of Acoustics; 2017, 42, 4; 643-651
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technical Notes : Practical Concerns Associated with Single-Number Ratings in Measuring Sound Transmission Loss Properties of Partition Panels
    Autorzy:
    Garg, N.
    Kumar, A.
    Maji, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/177637.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Sound Transmission Loss
    Sound Transmission Class
    spectrum adaptation terms
    ISO 717-1
    weighted sound reduction index
    spectrum adaptation term corresponding to noise source
    Cx
    TL
    STC
    Opis:
    The paper presents an extensive review investigating the practical aspects related to the use of single- number ratings used in describing the sound insulation performance of partition wall panels and practical complications encountered in precise measurements in extensive frequency range from 50 Hz to 5 kHz. SWOT analysis of various single number ratings is described. A laboratory investigation on a double wall partition panel combination revealed the significant dependence of STC rating on transmission loss at 125 Hz attributed to 8 dB rule. An investigation conducted on devising alternative spectrums of aircraft noise, traffic noise, vehicular horn noise and elevated metro train noise as an extension to ISO 717-1 Ctr for ascertaining the sound insulation properties of materials exclusively towards these noise sources revealed that the single-number rating Rw + Ctr calculated using ISO 717-1 Ctr gives the minimum sound insulation, when compared with Rw + Cx calculated using the alternative spectrums of aircraft noise, traffic noise, etc., which means that material provides a higher sound insulation to the other noise sources. It is also observed that spectrum adaptation term Cx calculated using the spectrum of noise sources having high sound pressure levels in lower frequencies decreases as compared to ISO 717-1 Ctr owing to significant dependence of Ctr at lower frequencies.
    Źródło:
    Archives of Acoustics; 2013, 38, 1; 115-124
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parametric Sensitivity Analysis of Factors Affecting Sound Transmission Loss of Multi-Layered Building Elements Using Taguchi Method
    Autorzy:
    Garg, N.
    Kumar, A.
    Maji, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/178151.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spectrum adaptation terms
    weighted sound reduction index
    orthogonal array
    OA
    analysis of variance
    ANOVA
    mass-air-mass resonance
    Opis:
    The paper presents application of Taguchi method in optimizing the sound transmission loss through sandwich gypsum constructions and those comprising of masonry concrete blocks and gypsum boards in order to investigate the relative influence of the various parameters affecting the sound transmission loss. The application of Taguchi method for optimizing sound transmission loss has been rarely reported. The present work uses the results analytically predicted on “Insul” software for various sandwich material configurations as desired by each experimental run in an L8 orthogonal array. The relative importance of the parameters on single-number rating, Rw (C, Ctr) is evaluated in terms of percentage contribu- tion using Analysis of Variance (ANOVA). The ANOVA method reveals that type of studs, steel stud frame and number of gypsum layers attached are the key factors controlling the sound transmission loss characteristics of sandwich multi-layered constructions.
    Źródło:
    Archives of Acoustics; 2014, 39, 2; 165-176
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation and Analysis of Environmental Noise Pollution in Seven Major Cities of India
    Autorzy:
    Garg, N.
    Sinha, A. K.
    Dahiya, M.
    Gandhi, V.
    Bhardwaj, R. M.
    Akolkar, A. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/177396.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    NANMN
    National Ambient Noise Monitoring Network
    day equivalent level
    Lday
    night equivalent level
    Lnight
    day-night average sound level
    Ldn
    equivalent continuous sound pressure level
    LAeq,24h
    Opis:
    The paper describes the noise monitoring data acquired from the pilot project on the establishment of National Ambient Noise Monitoring Network (NANMN) across seven major cities in India for continuous noise monitoring throughout the year. The annual average Lday (06–22 h) and Lnight (22–06 h) values observed in year 2011–2014 for the 35 locations under study in which 14 locations are in commercial zone, 5 in Industrial, 7 in residential and 9 in silence zones are described. The long-term noise monitoring shows that ambient noise levels have marginally increased for 29 sites (82.9%) since past four years. The present study is focused on evaluation and analysis of environmental noise pollution at 35 noise monitoring sites in seven major cities of India and shall be instrumental in planning for the noise abatement measures for controlling the noise pollution in these sites.
    Źródło:
    Archives of Acoustics; 2017, 42, 2; 175-188
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Similarity solution for combined free-forced convection past a vertical porous plate in a porous medium with a convective surface boundary condition
    Autorzy:
    Garg, P.
    Purohit, G. N.
    Chaudhary, R. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/265568.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    płyta porowata
    tarcie
    ośrodek porowaty
    konwekcja
    combined convection
    fixed vertical porous plate
    skin-friction coefficient
    Nusselt number
    convective surface boundary condition
    porous medium
    Opis:
    This paper studies the mathematical implications of the two dimensional viscous steady laminar combined free-forced convective flow of an incompressible fluid over a semi infinite fixed vertical porous plate embedded in a porous medium. It is assumed that the left surface of the plate is heated by convection from a hot fluid which is at a temperature higher than the temperature of the fluid on the right surface of the vertical plate. To achieve numerical consistency for the problem under consideration, the governing non linear partial differential equations are first transformed into a system of ordinary differential equations using a similarity variable and then solved numerically under conditions admitting similarity solutions. The effects of the physical parameters of both the incompressible fluid and the vertical plate on the dimensionless velocity and temperature profiles are studied and analysed and the results are depicted both graphically and in a tabular form. Finally, algebraic expressions and the numerical values are obtained for the local skin-friction coefficient and the local Nusselt number.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2016, 21, 4; 827-836
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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