نتایج جستجو برای: 2045 compared to base period 2010
تعداد نتایج: 10798675 فیلتر نتایج به سال:
one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...
the purpose of the present study was to see which one of the two instruction-processing instruction (pi) and meaningful output based instruction (mobi) accompanied with prompt and recast- is more effective on efl learners’ writing accuracy. in order to homogenize the participants in term of language proficiency a preliminary english test (pet) was administrated between 74 intermediate students ...
abstract recent studies suggest that prelistening activities play an important role in the development of listening comprehension (e.g. long 1990;chiang and dunkel 1992; schmidt-rinehart 1994; jensen and hansen 1995; robinson et al., 1995; buck, 1995; foster and skehan,1996; teng 1996; robinson, 2001; chang and read 2006). in line with previous studies and to shed light on a new aspect of sche...
this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...
In this paper we present an algorithm for counting points on elliptic curves over a finite field Fpn of small characteristic, based on Satoh’s algorithm. The memory requirement of our algorithm is O(n), where Satoh’s original algorithm needs O(n) memory. Furthermore, our version has the same run time complexity of O(n) bit operations, but is faster by a constant factor. We give a detailed descr...
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...
due to climate changes, precipitation forecast average in time scale is one of the most important challenges for specialists in the recent years. the purpose of this research is to investigate the capabilities of the dynamic model regcm4 in precipitation forecast in cold period of fars province. in this study, september to february or 6 month is considered as the cold period. several variable s...
رطوبت خاک یک پارامتر تعیین کننده در بسیاری از فرآیندهای پیچیده زیستمحیطی است و نقش تعیین کنندهای در وقوع خشکسالی کشاورزی دارد. بدین منظور در این تحقیق، با استفاده از دادههای برآورد شده رطوبت خاک توسط مدل DSSAT و دادههای گزارش پنجم تغییراقلیم، خشکسالی کشاورزی بهکمک شاخص کمبود رطوبت خاک (SMDI) برای دورههای آتی (2015-2045) و (2045-2075) تعیین و با دوره پایه (1975-2005) مقایسه گردید. خروجی...
nowadays enhancing critical thinking in learners is considered one of the foreign language teachers’ tasks due to its high position in foreign language classrooms. when it comes to selecting materials for language classrooms, there are obviously some criteria that teachers should apply. the present study aimed at a critical thinking based analysis of ten picture story books and ten folktales th...
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