نتایج جستجو برای: has average potential and about 973444 hectares

تعداد نتایج: 17023686  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1392

while performance-based language assessment has led to an increased authenticity and content validity in the practice of writing assessment, the reliability of ratings has become a major issue. research findings have shown different reactions by native english speaker (nes) and non-native english speaker (nns) teachers to students’ writings. the focus of this study is on investigating whether i...

Journal: :journal of advances in computer research 2015
chandrakar kamath

the aim of this study is to evaluate how far lempel-ziv complexity (lzc) of the binary symbolic sequences resulting from static or dynamic transformation (partitioning first-order difference) of the short-term electrocardiogram (ecg) signals (only 2 seconds duration) has the  potential in discriminating normal and ventricular tachycardia/ventricular fibrillation (vt/vf) subjects. the statistica...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده علوم انسانی 1393

learning-oriented assessment seeks to emphasise that a fundamental purpose of assessment should be to promote learning. it mirrors formative assessment and assessment for learning processes. it can be defined as actions undertaken by teachers and / or students, which provide feedback for the improvement of teaching and learning. it also contrasts with equally important measurement-focused appro...

Journal: :مرتع و آبخیزداری 0
طیبه مصباح زاده دانشجوی دکتری بیابانزایی، دانشکده منابع طبیعی،دانشگاه تهران ،ایران حسن احمدی استاد گروه احیای مناطق خشک وکوهستانی ، دانشکده منابع طبیعی،دانشگاه تهران ،ایران غلامرضا زهتابیان استاد گروه احیای مناطق خشک وکوهستانی ، دانشکده منابع طبیعی،دانشگاه تهران ،ایران فریدون سرمدیان استادیار گروه مهندسی آب وخاک، دانشکده مهندسی آ ب وخاک، دانشگاه تهران ،ایران

investigation and preparing of wind erosion intensity maps are the main objectives of this research. in this research, the working unit map was prepared and then nine effective factors in wind erosion according to irifr.e.a model are determined at each of seven homogeneous units. according to the results, active sand dunes and landuse change showed the highest value with the rate of annual sedi...

Journal: :journal of herbal drugs (an international journal on medicinal herbs) 2011
asghar shahrokhi hamzeh ali shirmardi maryam ghaedamini

background & aim: chaharmahal va bakhtiari province contains several major floristic plant associations of central zagros mountains. kallar species were used for medicines nutrias in this area. however, these valuable species have been threatened and even become at risk of extinction due to habitat fragmentation and disturbance. therefore, the first step in protecting theses species is iden...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم 1391

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده منابع طبیعی 1392

nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد - دانشکده زبانهای خارجی 1391

the speech act of disagreement has been one of the speech acts that has received the least attention in the field of pragmatics. this study investigates the ways power relations, social distance, formality of the context, gender, and language proficiency (for efl learners) influence disagreement and politeness strategies. the participants of the study were 200 male and female native persian s...

Journal: :تولید گیاهان زراعی 0
محمد جواد بیدادی دانشجو بهنام کامکار هیئت علمی امید عبدی کارمند

optimal use of lands heavily relies on careful assessment of agro-ecological resources. the present study was aimed to zoning of suitable areas for of soybean cropping in qaresoo basin of golestan province by geographical information system (gis) and analytical hierarchy process (ahp). in this study, environmental components included: minimum, average, maximum temperatures, precipitation, slope...

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