Results 41 to 50 of about 26,944 (191)

Shape sensitivity of eigenvalue functionals for scalar problems: computing the semi-derivative of a minimum

, 2022
International audienceThis paper is devoted to the computation of certain directional semi-derivatives of eigenvalue functionals of self-adjoint elliptic operators involving a variety of boundary conditions.
Dambrine, Marc, Caubet, Fabien, Mahadevan, Rajesh   +2 more
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Least Squares Problems with Absolute Quadratic Constraints

Journal of Applied Mathematics, 2012
This paper analyzes linear least squares problems with absolute quadratic constraints. We develop a generalized theory following Bookstein's conic-fitting and Fitzgibbon's direct ellipse-specific fitting.
R. Schöne, T. Hanning
doaj   +1 more source

Dynamic Digital Channelizer Based on Spectrum Sensing. [PDF]

PLoS ONE, 2015
The ability to efficiently channelize a received signal with dynamic sub-channel bandwidths is a key requirement of software defined radio (SDR) systems.
Junpeng Hu, Zhen Zuo, Zhiping Huang, Zhi Dong   +3 more
doaj   +1 more source

Ordering non-bipartite unicyclic graphs with pendant vertices by the least Q-eigenvalue

Journal of Inequalities and Applications, 2016
A unicyclic graph is a connected graph whose number of edges is equal to the number of vertices. Fan et al. (Discrete Math. 313:903-909, 2013) and Liu et al. (Electron. J.
Shu-Guang Guo, Xiaorong Liu, Rong Zhang, Guanglong Yu   +3 more
doaj   +1 more source

Spectrum sensing through spectrum discriminator and maximum minimum eigenvalue detector: A comparative study

, 2012
In this paper we present a new spectrum sensing technique for cognitive radios based on discriminant analysis called spectrum discriminator and compare it with the maximum minimum eigenvalue detector.
Barbe, Kurt,, Mohamed Hamid, Hamid, Mohamed,, Van Moer, Wendy,, Wendy Van Moer, Björsell, Niclas,, Kurt Barbe, Niclas Bjorsell   +7 more
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Eigenvalue-based signal detectors performance comparison [PDF]

, 2011
The purpose of this paper is to compare the performance of eigenvalue-based signal detectors designed for IEEE 802.22 Wireless Regional Area Network (WRAN). Two eigenvalue techniques were studied, which are the eigenvalue decomposition (EVD) and singular
Hassan, Suhaidi, Awang Nor, Shahrudin, Suhaidi Hassan, Shahrudin Nor, Mohd. Omar, Omar, Mohd Hasbullah   +5 more
core   +1 more source

Exact Minimum Eigenvalue Distribution of a Correlated Complex Non-Central Wishart Matrix

, 2008
We derive the exact cumulative distribution function (c.d.f.) of the minimum eigenvalue of a correlated complex non-central Wishart matrix. This result is in the form of a simple infinite series with fast convergence, and applies for the important case ...
Prathapasinghe Dharmawansa, McKay, Matthew R., Matthew R. McKay, Dharmawansa, Prathapasinghe   +3 more
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New inequalities on the Fan product of M-matrices

Journal of Inequalities and Applications
This paper focuses on the minimum eigenvalue involving the Fan product. By utilizing the Hölder inequality and the classic eigenvalue inclusion theorem, we introduce two novel lower bounds for τ ( A 1 ⋆ A 2 ) $\tau \left ( A_{1}\star A_{2} \right ...
Qin Zhong, Na Li, Chunlan Li
doaj   +1 more source

Computation of the minimum eigenvalue for a nonlinear Sturm-Liouville problem [PDF]

, 2014
© 2014, Pleiades Publishing, Ltd. A condition for the existence of a minimum eigenvalue corresponding to a positive eigenfunction of the nonlinear eigenvalue problem for an ordinary differential equation is determined.
Solov’ev S., Zheltukhin V., Solov’ev P., Chebakova V.   +3 more
core  

On the inverse eigenvalue problem for a special kind of acyclic matrices [PDF]

, 2019
summary:We study an inverse eigenvalue problem (IEP) of reconstructing a special kind of symmetric acyclic matrices whose graph is a generalized star graph.
Heydari, Mohammad, Shahzadeh Fazeli, Seyed Abolfazl, Karbassi, Seyed Mehdi   +2 more
core   +1 more source