نتایج جستجو برای: rank of a matrix

تعداد نتایج: 23300114  

Journal: :Computational Economics 2023

Abstract In this paper, we consider optimal portfolio selection when the covariance matrix of asset returns is rank-deficient. For case, original Markowitz’ problem does not have a unique solution. The possible solutions belong to either two subspaces namely range- or nullspace matrix. former case has been treated elsewhere but latter. We derive an analytical solution, assuming solution in null...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید مدنی آذربایجان - دانشکده ادبیات و زبانهای خارجی 1389

according to coates’s (2004, as cited in zhang, 2010) definition of "conversational dominance" (p.111), it refers to the phenomenon of a speaker dominating others in interaction. specifically, it means how a speaker makes use of certain strategies to get the floor and maintain the floor. thus, the amount of talk is the main measurement for the dominance of the conversation. whether a speaker do...

اصغری‌زاده, عزت ا..., محامدپور, مریم ,

Multi attribute decision making (MADM) is a dynamic idea that has been established in line with creating techniques and methods to enable a decision maker to solve complicated problems which are composed of several contradictory, different factors. One of the most attractive techniques in practice is additive rank order method to com-pare ordinal evaluations of actions on criterion which is cal...

Journal: :IEEE Transactions on Information Theory 2012

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1392

while performance-based language assessment has led to an increased authenticity and content validity in the practice of writing assessment, the reliability of ratings has become a major issue. research findings have shown different reactions by native english speaker (nes) and non-native english speaker (nns) teachers to students’ writings. the focus of this study is on investigating whether i...

Journal: :Journal of Computational and Applied Mathematics 2008

Journal: :Journal of High Energy Physics 2006

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده علوم انسانی و پایه 1393

burnout is a response to the chronic work stress which is prevalent mostly among the people who do people job, like teaching. the purpose of this study was to develop a valid and reliable instrument that can measure burnout in foreign language teachers. although some widely used instruments were developed before which measured burnout in teachers, a specific instrument which include specific sy...

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