نتایج جستجو برای: tightbinding model
تعداد نتایج: 2104312 فیلتر نتایج به سال:
در این پایان نامه ضمن مطالعه کمی منابع آب زیرزمینی دشت تربت حیدریه، مدل ریاضی آبخوان نیز تهیه شده و در نهایت پتانسیل آبهای زیرزمینی منطقه با یکسری پیش بینی هایی با نرخ خای مختلف تغذیه مورد مطالعه قرار گرفته و پیشنهاداتی با توجه به وضع موجود و آتی آبهای زیرزمینی ارائه گردیده است . نظر به اینکه مدل تفهیمی (conceptual model) و تجزیه و تحلیل سیستم آبخوان خیلی به تهیه مدل عددی کمک می نماید، لذا سیست...
this study considers the level of increase in customer satisfaction by supplying the variant customer requirements with respect to organizational restrictions. in this regard, anp, qfd and bgp techniques are used in a fuzzy set and a model is proposed in order to help the organization optimize the multi-objective decision-making process. the prioritization of technical attributes is the result ...
some researches made in the field of agency problem issue, deal with the role of control systems regarding owners and managers. in this research the relationship between the two control mechanisms, namely the voluntary disclosure (external control mechanism) and outside directors (internal control mechanism), which are reductive of agency problems, has been studied. for this reason, a sample ...
The predictive power of molecular dynamics simulations is determined by the accessible system sizes, simulation times and, above all, the accuracy of the underlying potential energy surface. Tremendous progress has been achieved in recent years to extend the system sizes via multi-scale approaches and the accessible simulation times by enhanced sampling techniques. Such improvements on the samp...
abstract due to low spatial resolution or simplifying of some micrometeorological phenomena, atmospheric general circulation models are not able to give a good estimation for weather conditions over study area. so their outputs should downscale into weather stations scales. in this research data of hadcm3 downscaled by using lars-wg5 with three scenarios, confirmed by ipcc including a1b, a2 and...
background: excellence and quality models are comprehensive methods for improving the quality of healthcare. the aim of this study was to design excellence and quality model for training centers of primary health care using delphi method. methods: in this study, delphi method was used. first, comprehensive information were collected using literature review. in extracted references, 39 models we...
in the present paper, a 3d numerical model has been applied to predict the flow hydrodynamics around power intakes within the dez dam reservoir. the dez dam is a 203 m high, double arch concrete dam which is constructed by italians in 1962. since then, sedimentation in reservoirhas continued and since the dam does not have bottom outlet, the reservoir bed level is raising by a rate of about 2.5...
this paper considers the search problem, introduced by srivastava cite{sr}. this is a model discrimination problem. in the context of search linear models, discrimination ability of search designs has been studied by several researchers. some criteria have been developed to measure this capability, however, they are restricted in a sense of being able to work for searching only one possible non...
to describe the rheological behavior of polymer blends using emulsionbased (palierne theory) as well as micromechanical models (coranapproach), two immiscible polymeric blend systems of poly(trimethylene terephthalate) (ptt)/polyamide-12 (pa12) and ptt/polyethylene (pe) having different levels of molecular interactions were investigated as model systems. the role of interfacial interactions, vi...
این تحقیق با هدف آشنایی با ربات موازی stewart و بررسی کاربردهای آن، مدل سازی سینماتیکی، استاتیکی و دینامیکی این ربات و استفاده از مدل سینماتیکی و استاتیکی ارایه شده برای مدل سازی ظرفیت حمل بار آن و ارایه یک الگوریتم محاسباتی برای تعیین بیشترین بار قابل جمل ربات در یک مسیر مشخص انجام شده است. و در ادامه یک مدل آزمایشگاهی از این نوع ربات، تحت عنوان 6ups-stewart platform طراحی شده است و روابط سینم...
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