نتایج جستجو برای: in drastic method
تعداد نتایج: 17233902 فیلتر نتایج به سال:
آلودگی آب های زیرزمینی ناشی فعالیت های انسانی یکی از جدی ترین مشکلات زیست محیطی در مناطق شهری و صنعتی است. از طرفی با توجه به نیاز روزافزون جوامع بشری به منابع آب زیرزمینی، به ویژه در مناطق خشکی مانند ایران حفاظت و جلوگیری از آلودگی این منابع امری ضروری تلقی می گردد. بدین منظور ارزیابی آسیب پذیری آب های زیرزمینی می تواند نقش حیاتی در حفاظت از این منابع ایفا نماید. از این رو در این تحقیق به شناس...
in this thesis protic and aprotic ammonium-based ionic liquids were synthesized and their surface tensions were measured in the range of 298-373k. the protics are alkyl ammonium-based ils with the carboxylate (formate, acetate, propionate) anion and aprotics are quaternary ammonium-based ils with bis(trifluoromethylsulfonyl)imide anion. capillary rise method was used for surface tension measure...
this study aims to investigate value conflicts between mothers and their daughters among families and influential factors on this conflict in yazd city. this study adopted a survey method and a questionnaire was used that its validity through construct validity (factor analysis) and its reliability by cronbach alpha were measured. the population of this study consists of all yazdian families th...
a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...
دراین پروژه ابتدا مروری بر ساختار محفظه ها کرده و بعد از آن به بررسی کاتد مجازی که اساس ساختار لامپهای توان بالا می باشد می پردازیم .سپس روش تقسیم بندی ذرات در سلولها (particle in cell) که جهت شبیه سازی این گونه محفظه ها بکار برده می شود ، مورد بررسی قرار می گیرد . در فصل بعد آلگوریتم و معادلات موجوددر این شبیه سازی همراه با مروری بر روش تفاضلی محدود (finite difference method) ارائه می ...
Groundwater pollution poses a severe threat and issue to the environment humanity overall. That is why mitigative strategies are urgently needed. Today, studies mapping groundwater risk assessment being developed. In this study, five new hybrid/ensemble machine learning (ML) models developed, named DRASTIC-Random Forest (RF), DRASTIC-Support Vector Machine (SVM), DRASTIC-Multilayer Perceptron (...
The 5S method is a sophisticated Japanese tool for optimisation and improvement of the production process. The purpose of applying the 5S method is to increase the efficiency on the micro-level, keeping workplace clean, in order and accessible. The results are reflected in drastic increase of safety, space utilization, productivity, pride and Kaizen thinking; and drastic reduction of waste, def...
Abstract Industrial and municipal wastes, agricultural contamination owing to pesticides chemical hazards, seawater intrusion in coastal areas, other factors damage groundwater. In several towns industrial clusters across India, this is becoming a rising subject of concern. Groundwater difficult contaminate, but once contaminated, it clean up. It critical attain goal using variety aquifer vulne...
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