نتایج جستجو برای: the high floc size
تعداد نتایج: 16388903 فیلتر نتایج به سال:
there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
The postfragmentation probability density of daughter flocs is one of the least well-understood aspects of modeling flocculation. We use three-dimensional positional data of Klebsiella pneumoniae bacterial flocs in suspension and the knowledge of hydrodynamic properties of a laminar flow field to construct a probability density function of floc volumes after a fragmentation event. We provide co...
In this study, the cationic lignin-based flocculant was prepared and used with polyferric chloride (PFC) to treat disperse and reactive dyes wastewater. The effects of dosage, initial pH, hardness and ionic strength on the interactions and floc properties were studied. Results showed that hydroxyl and quaternary ammonium groups of LBF could combine with -NHand sulfo groups of dyes. Large flocs ...
The bacterium strain No. 12 isolated from a phenol-adapted activated sludge as a floc-forming bacterium was found to produce an exoenzyme which could deflocculate its own floc. As the floc of this bacterium was not deflocculated with EDTA and various enzymes such as cellulase, protease, and lysozyme, this exoenzyme was isolated and purified. The optimal pH of the enzyme for deflocculation was 3...
according to research, academic self-concept and academic achievement are mutually interdependent. in the present study, the aim was to determine the relationship between the academic self-concept and the academic achievement of students in english as a foreign language and general subjects. the participants were 320 students studying in 4th grade of high school in three cities of noor, nowshah...
abstract type-ii fuzzy logic has shown its superiority over traditional fuzzy logic when dealing with uncertainty. type-ii fuzzy logic controllers are however newer and more promising approaches that have been recently applied to various fields due to their significant contribution especially when the noise (as an important instance of uncertainty) emerges. during the design of type- i fuz...
the purpose of this study was to investigate the relationship between teachers’ class management practices with students’ self- regulated learning and academic self-efficacy. in this study relating to the management class, three dimensions, (training management, people management and behavior management) and three style (interventionist, interactionist and non-interventionist) was considered. r...
Floc size distribution is one of the key parameters to characterize flocculating cohesive sediment. An Eulerian–Lagrangian framework has been implemented study flocculation dynamics sediments in homogeneous isotropic turbulent flows. Fine sediment particles are modeled as dispersed phase by discrete element method, which tracks motion individual particles. adhesive contact model with rolling fr...
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