نتایج جستجو برای: matrix data
تعداد نتایج: 2698326 فیلتر نتایج به سال:
We consider here the problem of estimating p×p scale matrix Σ a multivariate linear regression model when distribution observed belongs to large class elliptically symmetric distributions. Any estimator Σˆ is assessed through data-based loss tr(S+Σ(Σ−1Σˆ−Ip)2) where S sample covariance and S+ its Moore–Penrose inverse.
Matrix completion problem has gathered a lot of attention in recent years. In the matrix completion problem, the goal is to recover a low-rank matrix from a subset of its entries. The graph matrix completion was introduced based on the fact that the relation between rows (or columns) of a matrix can be modeled as a graph structure. The graph matrix completion problem is formulated by adding the...
I want to thank Joachim Weickert and Christoph Schnörr for their support. I hereby certify that the work reported in this diploma thesis is my own and that work performed by others is appropriately cited. Abstract During the last decade diffusion methods became more and more popular in the fields of image processing and computer vision. They are used for smoothing and regularization in cases wh...
previous studies have aimed at testing a hypothesis but the present study is data-first research in which researcher tries to form a theory from data rather than the use of data to test a hypothesis. this study aims at exploring teachers perceptions of the strengths and weaknesses of the current syllabus for college preparatory course. eight experienced teachers were selected to collect data du...
the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...
abstract in this thesis at first we comput the determinant of hankel matrix with enteries a_k (x)=?_(m=0)^k??((2k+2-m)¦(k-m)) x^m ? by using a new operator, ? and by writing and solving differential equation of order two at points x=2 and x=-2 . also we show that this determinant under k-binomial transformation is invariant.
If only we always knew ahead of time.... The dream of any stock portfolio manager 1 is to allocate stocks in his portfolio in hindsight so as to always reach maximum 2 wealth. With hindsight, over a given time period, the best strategy is to invest into 3 the best performing stock over that period. However, even this appealing strategy is 4 not without regret. Reallocating everyday to the best ...
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