نتایج جستجو برای: case control
تعداد نتایج: 2543674 فیلتر نتایج به سال:
چکیده ندارد.
Parametric uncertainty can represent parametric tolerance, parameter noise or parameter disturbances. The effects of these uncertainties on the time evolution of a system can be extremely significant, mostly when studying closed-loop operation of control systems. The presence of uncertainty makes the modeling process challenging, since it is impossible to express the behavior of the system with...
In this paper we consider the problem of controlling a multi–inventory system in the presence of uncertain demand. The demand is unknown but bounded in an assigned compact set. The control input is assumed to be also constrained in a compact set. We consider an integral cost function of the buffer level and we face the problem of minimizing the worst case cost. We show that the optimal cost of ...
In this paper we will introduce a measure of saturation for unstructured texts of unknown domains. Therefore we will present the Textual Coverage Rate (TCR), a method to determine the IE coverage of unstructured texts using a given vocabulary. We advance efficiency while building vocabulary repositories tailored for given problems and ensure a certain quality of representation. Our approach, wh...
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 ...
Increasing automation of business processes and industrial demand for complex workflow features have led to the development of more flexible and agile workflow concepts. One of those concepts is the use of goal-oriented workflows, which rely on ideas derived from agent technology like describing the workflows based on a goal hierarchy. While this reduces the gap between business view and IT vie...
in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
this exploratory study aimed to investigate a possible relationship between learners’ beliefs about language learning and one of their personality traits; that is,locus of control (loc). both variables, beliefs and locus of control, are assumed to influence the language learning process. the internal control index (ici) and the beliefs about language learning inventory (balli) were administered...
دیابت شیرین، بیماری مزمنی است که به علت افزایش قند خون، باعث عوارض و ناتوانیهای گوناگون ماندگار در بیماران دیابتی می گردد و اگر به خوبی کنترل نگردد باعث عوارض و صدمات متعدد به ارگانهای مختلف و در نتیجه افت شیوه ی زندگی (lifestyle) و ناتوانی فرد و نهایتاً کاهش طول عمر بیمار می شود. این مطالعه با هدف بررسی تأثیر مصرف اپیوم بر قند خون بیماران دیابتی که با روشهای مختلف اندازه گیری شدند صورت گرفت. ...
هدف : بررسی رابطه بین سطح tsh و افسردگی در زنان جوان و میانسال روش مطالعه : مطالعه حاضر به صورت مورد شاهدی (control-case) بر روی زنان جوان و میانسال مراجعه کننده به بیمارستان امیر انجام شد. حجم نمونه با استفاده از فرمول های آماری حدود 50 نفر برای هر گروه به دست آمد. گروه مورد شامل تمام زنان مراجعه کننده به درمانگاه های داخلی و غدد و با آزمایش تیروئید مختل بوده اند. گروه شاهد آزمایش tsh طبیعی ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید