Browsing by Author "Militký Jiří"

Now showing 1 - 20 of 427
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    2015 Annual Report of L&L Acoustic Project
    (2015-01-01) Militký Jiří; Zhu Guocheng; Yang Tao
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    3D Numerical Simulation of Laminar flow and Conjugate Heat Transfer through Fabric
    (Lodz University, 2017-01-01) Zhu Guocheng; Křemenáková Dana; Wang Yan; Militký Jiří; Mishra Rajesh; Wiener Jakub
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    3D Spacer Knitted Fabrics with Advanced Characteristics
    (University of Zagreb, Faculty of Textile Technology, Zagreb, Croatia, 2016-01-01) Mishra Rajesh; Veerakumar Arumugam; Militký Jiří; Křemenáková Dana
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    A comparison of fabric structures for carbon fiber reinforced composite: Laminated and orthogonal woven structures
    (Wiley, 2021-01-01) Yang Tao; Wang Yan; Petrů Michal; Militký Jiří
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    A new method and apparatus for evaluating the electromagnetic shielding effectiveness of textiles
    (SAGE Publications Ltd, 2016-01-01) Tunáková Veronika; Tunák Maroš; Truhlář Martin; Militký Jiří
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    A review of acoustic absorption materials: sustainable natural fibrous materials
    (OPS, 2015-01-01) Militký Jiří; Tomková Blanka; Rwawiire Samson
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    A review of acoustic properties measurements and wave propagation models of porous materials
    (OPS, 2015-01-01) Novák Jan; Militký Jiří; Mishra Rajesh; Sanetrník Filip; Yang Tao; Xiong Xiaoman
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    A review of PCM and their application in textile
    (technical university of liberec, 2019-01-01) Yang Kai; Venkataraman Mohanapriya; Militký Jiří; Wiener Jakub
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    A review on flax fiber reinforced composites
    (OPS, 2015-01-01) Militký Jiří; Veerakumar Arumugam; Mishra Rajesh; Ramanisanthi Subramanian Vignesh Balaji
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    A Review on Nanofibrous Membranes and Their Applications
    (OPS, 2016-01-01) Xiong Xiaoman; Yang Tao; Huang Juan; Mishra Rajesh; Militký Jiří
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    A study of residual pesticides on conventional and organic cotton comparing biosensor and gas chromatography techniques
    (Technical University of Liberec, 2017-01-01) Ul Hassan Syed Zameer; Militký Jiří; Krejči Jan; Mishra Rajesh; Naeem Muhammad Salman; Javed Saima; Asghar Ali; Kashif Muhammad; Naeem Jawad
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    A study of thermo-physiological comfort behavior of 3-dimensional spacer knitted fabric
    (OPS, 2015-01-01) Mishra Rajesh; Venkataraman Mohanapriya; Křemenáková Dana; Novák Jan; Militký Jiří; Kotresh T M; Salačová Jana; Ramanisanthi Subramanian Vignesh Balaji; Veerakumar Arumugam
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    A study on penetration of polymers in Aerogel granular particles
    (Tanger, 2013-01-01) Venkataraman Mohanapriya; Mishra Rajesh; Wiener Jakub; Militký Jiří; Exnar Petr
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    About new textile materials
    (UMPRUM Praha, 2015-01-01) Militký Jiří; Rollová Veronika
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    Acoustic and thermal properties of a cellulose nonwoven natural fabric (barkcloth)
    (Elsevier Sci Ltd., 2017-01-01) Rwawiire Samson; Tomková Blanka; Militký Jiří; Hes Luboš; Kale Bandu Madhukar
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    Acoustic evaluation of Struto nonwovens and their relationship with thermal properties
    (Sage, 2018-01-01) Yang Tao; Xiong Xiaoman; Mishra Rajesh; Militký Jiří; Novák Jan
    This paper presents an experimental investigation on the sound absorption behavior and thermal properties of Strutononwovens by establishing relationship between these properties. Seven Struto nonwoven fabrics were selected toexamine the noise reduction coefficient (NRC) and average values of sound absorption coefficients as well as thermalproperties, including thermal conductivity and thermal resistance. The Bruel and Kjar impedance tube instrument andAlambeta were used for the evaluation of acoustic and thermal properties, respectively. The influence of structuralparameters on acoustic and thermal properties of Struto nonwovens were investigated and analyzed. The results showedthat Struto nonwovens with higher thickness, finer fibers and higher fabric grams per square meter can provide bettersound absorption performance. The effect of specific airflow resistance on sound absorption performance was alsoinvestigated. It is observed that sound absorption performance has a strong correlation with specific airflow resistance.The effect of porosity on specific airflow resistance and thermal properties was studied in detail. The result indicated thatporosity has a strong correlation with specific airflow resistance and thermal properties. It was also observed that soundabsorption, the NRC and have an insignificant correlation with thermal conductivity, while they are strongly correlatedwith thermal resistance. The correlation coefficient of the NRC with thermal resistance is 0.9835, indicating that theNRC is directly proportional to the thermal resistance of Struto nonwovens.
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    ACOUSTIC PROPERTIES OF ADVANCED NONWOVENS
    (Technical University of Liberec, 2019-01-01) Mishra Rajesh; Militký Jiří; Yang Tao; Xiong Xiaoman
    Sound absorption property of perpendicularly-laid nonwovens were tested by Brüel and Kjær measuring instrument. The effect of manufacturing techniques on sound absorption performance was investigated. The effect of porosity and airflow resistivity on sound absorption ability was studied. It is found that there is no significant influence of two manufacturing techniques on sound absorption performance. The increase of areal density results in improvement of sound absorption ability. The increase of thickness can improve sound absorption coefficient at low-frequency range, but decrease of the coefficient occurred at high-frequency range. A quadratic relationship between porosity and sound absorption ability has been found. The airflow resistivity is a key parameter to predict accurately the acoustical properties of fibrous media. There is a large number of theoretical and empirical models which can be used to predict the airflow resistivity of this type of porous media. However, there is a lack of experimental data on the accuracy of these models in the case of multi-component fibrous media. This study presents a detailed analysis of the accuracy of several existing models to predict airflow resistivity which make use of the porosity, bulk density and mean fiber diameter information. The AFD300 AcoustiFlow device was employed to measure airflow resistivity. It is shown that some existing models largely under- or overestimate the airflow resistivity when compared with the measured values. A novel feature of this work is that it studies the relative performance of airflow resistivity prediction models that are based on the capillary channel theory and drag force theory. These two groups of models are then compared to some purely empirical models. It is found that the mean absolute values of relative error (MAVRE) by some models is unacceptably high (e.g. >20-30%). The results suggest that there are existing models which can predict the airflow resistivity of multi-component fibrous media with 12.8% accuracy. A simple empirical model based on fiber diameter and fabric bulk density has been obtained through power-type model. This model exhibits very small error which is 5.1%.
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    Acoustic properties of Aerogel
    (OPS, 2016-01-01) Venkataraman Mohanapriya; Mishra Rajesh; Kotresh T M; Militký Jiří
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    Acoustic properties of aerogel embedded nonwoven fabrics
    (TANGER LTD, OSTRAVA, 2015-01-01) Militký Jiří; Jamshaid Hafsa; Veerakumar Arumugam; Venkataraman Mohanapriya; Mishra Rajesh
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    Acoustic Properties of aerogel Embedded Nonwoven Fabrics
    (OPS, 2015-01-01) Venkataraman Mohanapriya; Mishra Rajesh; Kotresh T M; Veerakumar Arumugam; Mishra Srabani; Jamshaid Hafsa; Militký Jiří; Křemenáková Dana