نتایج جستجو برای: rank of a matrix
تعداد نتایج: 23300114 فیلتر نتایج به سال:
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...
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...
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...
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...
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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