نتایج جستجو برای: non definite problem

تعداد نتایج: 2109236  

Journal: :Iet Communications 2023

This paper explores the potential application of simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) in improving physical layer security (PLS) millimetre wave (mmWave) non-orthogonal multiple access (NOMA) uplink communications. In particular, legitimate users on both sides STAR-RIS send confidential information to base station (BS) while keeping it secret ...

1987
Harry H. Porter

Hassan Ait-Kaci introduced the #/-term, an informational structure resembling feature-based functional structures but which also includes taxonomic inheritance (Ait-Kaci, 1984). We describe e-terms and how they have been incorporated into the Logic Grammar formalism. The result, which we call Inheritance Grammar, is a proper superset of DCG and includes many features of PATR-II. Its taxo-nomic ...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده برق و الکترونیک 1390

there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...

  We present a new full Nesterov and Todd step infeasible interior-point algorithm for semi-definite optimization. The algorithm decreases the duality gap and the feasibility residuals at the same rate. In the algorithm, we construct strictly feasible iterates for a sequence of perturbations of the given problem and its dual problem. Every main iteration of the algorithm consists of a feasibili...

1998
Takayuki Hori

We discuss the problem of time in spherically symmetric pure Einstein gravity with the cosmological term by using an exact solution to the Wheeler-DeWitt equation. A positive definite inner product is defined, based on the momentum constraint rather than the hamiltonian constraint. A natural notion of time is introduced via the Heisenberg equation. This notion enables one to reproduce the time-...

Journal: :Computational Mechanics 2022

The computational analysis of fiber network fracture is an emerging field with application to paper, rubber-like materials, hydrogels, soft biological tissue, and composites. Fiber networks are often described as probabilistic structures interacting one-dimensional elements, such truss-bars beams. Failure may then be modeled strong discontinuities in the displacement that directly embedded with...

1986
Andreas Eisele Jochen Dörre

This paper describes a system in PROLOG for the automatic transforination of a grammar, written in LFG formalism, into a DCG-based parser. It demonstrates the main principles of the transformation, the representation of f-structures and constraints, the treatment of long-distance dependencies, and left rccursion. Finally some problem areas of the system and possibilities for overcoming them are...

1994
Michael Sharpe Nizam Ahmed Geoff Sutcliffe

This paper presents the design and implementation of an intelligent document understanding and reproduction system. The system analyses a printed document to create an electronic document. The electronic document is written in a standard type-setting language (L w), and is thus human usable. The output from processing the electronic document closely resembles the original printed document. A ne...

Journal: :SIAM J. Matrix Analysis Applications 2011
Ren-Cang Li Yuji Nakatsukasa Ninoslav Truhar Shufang Xu

This paper is concerned with the Hermitian definite generalized eigenvalue problem A− λB for block diagonal matrices A 1⁄4 diagðA11; A22Þ and B 1⁄4 diagðB11; B22Þ. Both A and B are Hermitian, and B is positive definite. Bounds on how its eigenvalues vary when A and B are perturbed by Hermitian matrices are established. These bounds are generally of linear order with respect to the perturbations...

Journal: :SIAM Journal on Matrix Analysis and Applications 2009

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید