نتایج جستجو برای: modified coefficient efficiency
تعداد نتایج: 781710 فیلتر نتایج به سال:
Background and Objective: Main sources of 4-chlorophenol wastewater are petroleum industry, coal, paper and resin production. The aim of this study was to compare the performance of raw and cationic surfactant modified nanoclay in removal of 4-chlorophenol from aqueous solutions. Materials and Methods: The influence of contact time, initial pH of solution, adsorbent dosage and 4-chlorophenol c...
Introduction: Modified Euro Quest questionnaire to assess neurological and psychiatric effects caused by exposure to organic solvents is used. This study investigates the validity, reliability, and usability of the modified Euro Quest questionnaire in Iran. Materials and Methods: This cross-sectional descriptive study was conducted on 206 workers of color and textile industries. Modified Euro ...
Abstract This study proposes a novel technology to enhance heat transfer by combining nanofluid and helical grooved tubes. The researchers used two-step method obtain stable modified CuO nanofluid. They then constructed an experimental setup investigate the single-phase of in tube, compared its performance traditional methods under varying volume fractions Reynolds numbers. results indicate tha...
Regression equations of sediment rating curves are too biased due to the logarithmic of the discharge and suspended sediment data. In this study, correction coefficients were used to improve the results of river sediment estimation methods in Bashar and Zohreh hydrometric stations with different indices of accuracy and precision. The present study aims to evaluate the performance of five method...
Introduction: The JPEG2000 standard [1] has shown better performance than the widely used JPEG standard [2]. Nevertheless, efforts to improve JPEG2000 never stop. Long et al. [3] modified the quantisation step-size selection schemes for the uniform scalar quantisation used in JPEG2000 to improve the lossy compression. Lian et al. [4] proposed two skipping methods applied to the embedded block c...
Abstract Background: Photocatalytic process is used as a suitable method for o-chlorophenol removal. In this study, the efficiency of a mixture of modified fly ash and TiO2 nanoparticles in photocatalytic removal of o-chlorophenol was evaluated. Methods: After acid washing of fly ash, the absorbent was oxidized with potassium permanganate. ...
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