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تعداد نتایج: 298 فیلتر نتایج به سال:
In this paper we discuss the problem of computing the H∞-norm of transfer functions associated to large-scale descriptor systems. We exploit the relationship between the H∞-norm and the structured complex stability radius of a corresponding matrix pencil. To compute the structured stability radius we consider so-called structured pseudospectra. Namely, we have to find the pseudospectrum touchin...
We present two new algorithms for investigating the stability of large and sparse matrices subject to real perturbations. The first algorithm computes the real structured pseudospectral abscissa and is based on the algorithm for computing the pseudospectral abscissa proposed by Guglielmi and Overton [SIAM J. Matrix Anal. Appl., 32 (2011), pp. 1166-1192]. It entails finding the rightmost eigenva...
Following the work of Shida, Shindoh, and Kojima and of Monteiro and Zanjacomo, we study the issue of existence and uniqueness of search directions in interior-point methods for the monotone LCP over the space of n n symmetric block-diagonal matrices, with particular focus on the direction of Alizadeh, Haeberly, and Overton (AHO). We give an ana-log of a result of Shida et al., characterizing e...
This paper establishes the polynomialconvergence of the class of primal-dualfeasible interior-point algorithms for semideenite programming (SDP) based on Monteiro and Zhang family of search directions. In contrast to Monteiro and Zhang's work, no condition is imposed on the scaling matrix that determines the search direction. We show that the polynomial iteration-complexity bounds of two well-k...
This is a summary of the activities and scientific content of the first International Society for Computational Biology Student Council symposium in Africa. This meeting organized by the students for the students took place 8th of March 2015 in Dar Es Salaam, Tanzania.
The integration of heterogeneous data sources and software systems is a major issue in the biomed ical community and several approaches have been explored: linking databases, "on-thefly" integration through views, and integration through warehousing. In this paper we report on our experiences with two systems that were developed at the University of Pennsylvania: an integration system called K2...
In this paper we present a new algorithm for solving the second order cone programming problems which we call the Q method. This algorithm is an extension of the Q method of Alizadeh Haeberly and Overton for the semidefinite programming problem.
Open Access Oral presentation The European Project SIDARTHA using emergency care data for public health surveillance and health threat preparedness F Lippert*, G Brattebø, T Kettunen, L Myrmel, J Kurola, A Ziemann, T Krafft, L Garcia-Castrillo Riesgo, M Fischer, A Kraemer, G Vergeiner, M Baer, A Ozguler, A Meulemans, JB Gillet, H Brand, P Pinheiro, M Rosenberg, J Overton for the SIDARTHa projec...
Education and training are two essential ingredients for a successful career. On one hand, universities provide students a curriculum for specializing in one's field of study, and on the other, internships complement coursework and provide invaluable training experience for a fruitful career. Consequently, undergraduates and graduates are encouraged to undertake an internship during the course ...
The Gibbs Motif Sampler is a software package for locating common elements in collections of biopolymer sequences. In this paper we describe a new variation of the Gibbs Motif Sampler, the Gibbs Recursive Sampler, which has been developed specifically for locating multiple transcription factor binding sites for multiple transcription factors simultaneously in unaligned DNA sequences that may be...
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