Results 31 to 40 of about 4,064,750 (206)

Novel Investigation of Multivariable Conformable Calculus for Modeling Scientific Phenomena

open access: yesJournal of Mathematics, 2021
New investigation on the conformable version (CoV) of multivariable calculus is proposed. The conformable derivative (CoD) of a real-valued function (RVF) of several variables (SVs) and all related properties are investigated.
Mohammed K. A. Kaabar   +4 more
doaj   +1 more source

Discussion: One-step sparse estimates in nonconcave penalized likelihood models

open access: yes, 2007
Discussion of ``One-step sparse estimates in nonconcave penalized likelihood models'' [arXiv:0808.1012]Comment: Published in at http://dx.doi.org/10.1214/07-AOS0316C the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of ...
Zhang, Cun-Hui
core   +2 more sources

Discussion of: Brownian distance covariance [PDF]

open access: yes, 2009
Discussion on "Brownian distance covariance" by G\'abor J. Sz\'ekely and Maria L. Rizzo [arXiv:1010.0297]Comment: Published in at http://dx.doi.org/10.1214/09-AOAS312F the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of
Fukumizu, K   +2 more
core   +1 more source

Analysis of an Interface Crack between Piezoelectric Semiconductor Coating and Elastic Substrate Structure

open access: yesMathematics
Piezoelectric semiconductor materials possess a unique combination of piezoelectric and semiconductor effects, exhibiting multifaceted coupling properties such as electromechanical, acoustic, photoelectric, photovoltaic, thermal, and thermoelectric ...
Xiangru Tian   +4 more
doaj   +1 more source

Simultaneous representations of explanatory characteristics of mergers

open access: yesSouth African Journal of Business Management, 1988
In this paper we consider the effect of various explanatory characteristics on target and acquiring firm shareholder's wealth using a specialized graphical technique.
R. C. Van Den Honert, G. D.I. Barr
doaj   +1 more source

Discussion: The Dantzig selector: Statistical estimation when $p$ is much larger than $n$ [PDF]

open access: yes, 2007
Discussion of ``The Dantzig selector: Statistical estimation when $p$ is much larger than $n$'' [math/0506081]Comment: Published in at http://dx.doi.org/10.1214/009053607000000442 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute ...
Cai, T. Tony, Lv, Jinchi
core   +6 more sources

The post-listing performance of new listings: A study on the JSE

open access: yesSouth African Journal of Business Management, 1989
The authors examine the post-listing performance of new issues on the JSE. On the basis of an empirical study conducted over the 1975-1986 period, evidence is presented indicating that abnormal returns do occur during the post-listing period.
D. J. Bradfield, B. G. Hampton
doaj   +1 more source

A Conversation with George G. Roussas

open access: yes, 2011
George G. Roussas was born in the city of Marmara in central Greece, on June 29, 1933. He received a B.A. with high honors in Mathematics from the University of Athens in 1956, and a Ph.D.
Bhattacharya, Debasis   +1 more
core   +1 more source

Error bounds of block sparse signal recovery based on q-ratio block constrained minimal singular values

open access: yesEURASIP Journal on Advances in Signal Processing, 2019
In this paper, we introduce the q-ratio block constrained minimal singular values (BCMSV) as a new measure of measurement matrix in compressive sensing of block sparse/compressive signals and present an algorithm for computing this new measure.
Jianfeng Wang, Zhiyong Zhou, Jun Yu
doaj   +1 more source

Nonlinear Parabolic Variational Inequalities with Variable Time-Delay in Time Unbounded Domains

open access: yesJournal of Optimization, Differential Equations and Their Applications, 2023
We research the well-posedness of the problem without initial condition for nonlinear parabolic variational inequalities with variable time-delay. To justify our results, we impose some assumptions on the solution behavior and growth of the data-in as ...
Mykola M. Bokalo   +2 more
doaj   +1 more source

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