نتایج جستجو برای: مدل ols

تعداد نتایج: 124567  

2013
Michal Černý

We consider linear regression models where both input data (the values of independent variables) and output data (the observations of the dependent variable) are interval-censored. We introduce a possibilistic generalization of the least squares estimator, so called OLS-set for the interval model. This set captures the impact of the loss of information on the OLS estimator caused by interval ce...

2013
Jeffrey J. Harden Bruce A. Desmarais

State politics researchers commonly employ ordinary least squares (OLS) regression or one of its variants to test linear hypotheses. However, OLS is easily influenced by outliers and thus can produce misleading results when the error term distribution has heavy tails. Here we demonstrate that median regression (MR), an alternative to OLS that conditions the median of the dependent variable (rat...

Journal: : 2022

در این مقاله یک مدل ریاضی برای مسئله سیستم تولیدی همکارانه ساخت بر اساس سفارش با رعایت انصاف تخصیص بار‌های تولید طراحی شده است. اهداف اصلی مدل، کمینه‌سازی هزینه‌‌های کل و حداکثر استفاده از منابع به‌منظور عادلانه شرایط عدم­قطعیت کنترل پارامتر‌های غیرقطعی روش برنامه‌ریزی فازی ‌شده نتایج نشان می‌دهد افزایش نرخ عدم‌قطعیت، می­یابد. ازآنجاکه ظرفیت کارخانه‌ها ثابت است، مقدار تقاضا، هر کارخانه نیز می­ی...

غلامرضا پیکانی

در این پژوهش - با استفاده از مشاهدات ( 27 نمونه آماری ) تابع تولید بیولوژیکی گندم که متعلق به یک ایستگاه تحقیقات گندم در مکزیک است و بکار گیری روش OLS تحت نرم افزار EVIEWS و نیز با بهره گیری از مدل ابداعی ENLPM ضرایب فنی تابع تولید بیولوژیکی چند جمله ای (درجه دوم ) تخمین زده شد همزمان با آن مسئله چگونگی حداقل هزینه ترکیب نهاده ها ( کود و آب ) در تولید و نیز تحلیل حساسیت های لازم برای ایجاد ا...

Journal: :Journal of neuroscience research 2007
Joshua C Murtie Wendy B Macklin Gabriel Corfas

Oligodendrocytes (OLs), the myelinating cells of the central nervous system, have specialized morphologies that subserve their function. Numerous qualitative studies suggest that OLs in different brain regions can differ in their morphological characteristics, including number of branches and internodes, internode length, etc. However, progress in identifying and characterizing the diverse type...

2009
Matthias Krause Dirk Stegemann

Authenti ation Proto ols Matthias Krause and Dirk Stegemann Theoreti al Computer S ien e University of Mannheim Mannheim, Germany Abstra t. The limited omputational resour es available on RFID tags imply a need for spe ially designed authenti ation proto ols. The light weight authenti ation proto ol HB+ proposed by Juels and Weis seems urrently se ure for several RFID appli ations, but is too s...

2016
Lei Lei Ying Yang Hongjuan He Erfei Chen Le Du Jing Dong Jin Yang

Although numerous in vitro studies and animal model data have suggested that flavan-3-ols, the most common subclass of flavonoids in the diet, may exert protective effects against cancer, epidemiologic studies have reported inconclusive results for the association between flavan-3-ols intake and cancer risk. Therefore, we conducted this meta-analysis of epidemiologic studies to investigate the ...

Journal: :Nagoya journal of medical science 1997
K Sakita M Fujino T Koshikawa N Ohmiya M Ohbayashi J Asai

Hemolymph nodes (HLs) are unique lymph nodes, in that their lymphatic sinuses contain numerous erythrocytes. In this study, we compared the internal structure and immunologic function of HLs with those of ordinary lymph nodes (OLs) and the spleen. Electron microscopy revealed erythrocytes passing through the walls of blood vessels in the intermediate sinus area (IMSA) of a HL between expanded e...

Journal: :CoRR 2016
Samrat Mukhopadhyay Prateek Vashishtha Mrityunjoy Chakraborty

Abstract—Though the method of least squares has been used for a long time in solving signal processing problems, in the recent field of sparse recovery from compressed measurements, this method has not been given much attention. In this paper we show that a method in the least squares family, known in the literature as Orthogonal Least Squares (OLS), adapted for compressed recovery problems, ha...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1996
R I Cohen R Marmur W T Norton M F Mehler J A Kessler

There is increasing evidence that the neurotrophins, particularly nerve growth factor (NGF) and neurotrophin-3 (NT-3), play a role in the regulation of glial development in the CNS. Recent studies have shown that the proliferation of optic nerve-derived O2A progenitors (OLPs) is potentiated by NT-3 in combination with platelet-derived growth factor, whereas NT-3 alone supports the survival of t...

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