نتایج جستجو برای: simulation in c
تعداد نتایج: 17224524 فیلتر نتایج به سال:
abstract this study investigates the teachers’ correction of students’ spoken errors of linguistic forms in efl classes, aiming at (a) examining the relationship between the learners’ proficiency level and the provision of corrective feedback types, (b) exploring the extent to which teachers’ use of different corrective feedback types is related to the immediate types of context in which err...
در کشاورزی، داشتن مدلهای کامپیوتری رشد گیاهان و تعیین مقدار بهینه آب و کود نیتروژنه برای بهبود مدیریت منابع، حداکثر نمودن درآمد تولیدکنندگان و کاهش آلودگی منابع آب خیلی مهم است . در این تحقیق برای شبیه سازی رشد گیاه ذرت یک مدل به زبان(csm.corn simulation model) quick basic نوشته شده است .
بررسی ارزش غذایی تاغ و عمل آوری آن با سود و آهک در مراحل مختلف رشدبا استفاده از روش کیسه های نایلونی
abstract this study is carried out to determine the chemical composition in the three vegetative stages of the haloxylon sp., degradation parameters, with adding naoh and ca(oh2 ). for this purpose, in may and october and january 2010 enough some haloxylon sp. of the ammary area was prepared. crude protein and ash percentage are decrease, neutral detergent fiber percentage with pragress stage ...
DESP-C++ is a C++ discrete-event random simulation engine that has been designed to be fast, very easy to use and expand, and valid. DESP-C++ is based on the resource view. Its complete architecture is presented in detail, as well as a short “user manual”. The validity of DESP-C++ is demonstrated by the simulation of three significant models. In each case, the simulation results obtained with D...
water injection is an enhanced oil recovery method which is applied for number of reservoirs especially in the offshore fields around the world. sea-water injection process is usually associated with important concerns affecting the efficiency, safety, and economy of the operation like formation damage, mineral scaling, early breakthrough and corrosion. incompatibility between injected and form...
compressible gas flow inside a convergent-divergent nozzle and its exhaust plume atdifferent nozzle pressure ratios (npr) have been numerically studied with severalturbulence models. the numerical results reveal that, the sst k–ω model give the bestresults compared with other models in time and accuracy. the effect of changes in value ofdivergence half-angle (ε ) on the nozzle performance, thru...
objective: the objective of this study was to investigate the invitro fluoride release of four new self-adhesive resin cements; set (sdi, australia), breeze (pentron, usa), embrace wetbond (pulpdent, usa), g-cem (gc, japan) and to assess the bonding performance of these self-adhesive resin cements for bonding of orthodontic brackets. materials and methods: for fluoride release experiment, six ...
در این پایان نامه به بررسی ویژگی های توپولوژی نگاشت pi: x -> y از فضاهای فشرده x و y در ارتباط با ویژگی های جبری همریختی (c(y ) -> c(x از حلقه توابع پیوسته می پردازیم. در فصل اول مفاهیم و تعاریف پیش نیاز مطالب مورد بحث را ارائه می کنیم. در فصل دوم ثابت می کنیم که اگر توسیع حلقه (c(x از (c(y دارای عضو اولیه یعنی c(x) = c(y)[f باشد آن گاه این توسیع متناهی است و در نتیجه نگاشت به طور موضعی یک به ...
فرض کنیم $g$ یک گروه متناهی و $xsubseteq g$ باشد. گراف جابه جایی $c(g,x)$ عبارت است از گرافی با مجموعه رئوس $x$ به طوری که برای هر $x,yin x$، $xy$ یال است اگر و تنها اگر $xy = yx$. این گراف به طرق گوناگون بررسی شده است. در این جا دو حالت $c(g,g)$ و $c(g,g setminus z(g))$ را در نظر می گیریم. هدف ما بررسی ساختار، ویژگی های متریک و خواص گروه خودریختی های این گراف هاست. عل...
A Number of Industries release large amounts of water vapor into the atmosphere through their stacks. The flue gas can be a potential source for obtaining the required water for those industries. Separation process of water vapor by means of membrane condenser exchanger was studied. Numerical simulation of the process was conducted by COMSOL software using computational fluid dynamics. Simulati...
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