Results 51 to 60 of about 2,636 (156)

Penalty methods for a class of non-Lipschitz optimization problems

, 2016
We consider a class of constrained optimization problems with a possibly nonconvex non-Lipschitz objective and a convex feasible set being the intersection of a polyhedron and a possibly degenerate ellipsoid.
Chen, Xiaojun, Lu, Zhaosong, Pong, Ting Kei   +2 more
core   +1 more source

TODO: A Triple‐Outcome Double‐Criterion Optimal Design for Dose Monitoring‐and‐Optimization in Multi‐Dose Randomized Trials

Statistics in Medicine, Volume 44, Issue 10-12, May 2025.
ABSTRACT Detecting the efficacy signal and determining the optimal dose are critical steps to increase the probability of success and expedite the drug development in cancer treatment. After identifying a safe dose range through phase I studies, conducting a multidose randomized trial becomes an effective approach to achieve this objective.
Jingyi Zhang, Heng Zhou, Nolan A. Wages, Zifang Guo, Fang Liu, Thomas Jemielita, Fangrong Yan, Ruitao Lin   +7 more
wiley   +1 more source

An Augmented Lagrangian Approach for Sparse Principal Component Analysis [PDF]

, 2009
Principal component analysis (PCA) is a widely used technique for data analysis and dimension reduction with numerous applications in science and engineering. However, the standard PCA suffers from the fact that the principal components (PCs) are usually
Lu, Zhaosong, Zhang, Yong
core   +2 more sources

Nonmonotone systems decomposable into monotone systems with negative feedback

Journal of Differential Equations, 2006
The paper develops the ideas of monotone systems and control monotone systems: these systems arise from generalizing models with nonnegative coordinates. There are considered systems on partially ordered spaces. These are spaces with a cone. Within this framework the feedback system \[ \dot{x}=f(x,h(x)) \] is embedded in the larger symmetric system \[ \
Enciso, G.A., Smith, H.L., Sontag, E.D.
openaire   +1 more source

On fraud and certification of green production

Journal of Economics &Management Strategy, Volume 34, Issue 2, Page 501-524, Summer 2025.
Abstract We present a novel model of fraud and certification in green production. We focus on settings where firms decide between a green or a standard version of a product together with an advertising strategy that can include fraud. In addition, green firms can choose to certify their production to guarantee the truthfulness of their claims.
Carmen Arguedas, Esther Blanco
wiley   +1 more source

Distributed Evaluation of Nonmonotonic Multi-context Systems

Journal of Artificial Intelligence Research, 2015
Multi-context Systems (MCSs) are a formalism for systems consisting of knowledge bases (possibly heterogeneous and non-monotonic) that are interlinked via bridge rules, where the global system semantics emerges from the local semantics of the knowledge bases (also called “contexts”) in an equilibrium.
Minh Dao-Tran, Thomas Eiter, Michael Fink, Thomas Krennwallner   +3 more
openaire   +2 more sources

Vertical mergers without foreclosure

Journal of Economics &Management Strategy, Volume 34, Issue 2, Page 593-611, Summer 2025.
Abstract The typical concern about vertical mergers is the foreclosure of downstream rivals. In a vertically related industry where downstream firms have a common supplier, margins can reveal whether upstream competition constrains that supplier.
Alessandro S. Kadner‐Graziano
wiley   +1 more source

Coinvasion-Coexistence Traveling Wave Solutions of an Integro-Difference Competition System [PDF]

, 2013
This paper is concerned with the traveling wave solutions of an integro-difference competition system, of which the purpose is to model the coinvasion-coexistence process of two competitors with age structure.
Lin, Guo, Pan, Shuxia
core  

Adoption epidemics and viral marketing

Theoretical Economics, Volume 20, Issue 2, Page 453-480, May 2025.
An innovation (e.g., new product or idea) spreads like a virus, transmitted by those who have previously adopted it. Agents update their beliefs about innovation quality based on private signals and when they hear about the innovation. We characterize equilibrium adoption dynamics and the resulting lifecycle of virally‐spread innovations.
David McAdams, Yangbo Song
wiley   +1 more source

Multipoint secant and interpolation methods with nonmonotone line search for solving systems of nonlinear equations

, 2017
Multipoint secant and interpolation methods are effective tools for solving systems of nonlinear equations. They use quasi-Newton updates for approximating the Jacobian matrix.
Burdakov, Oleg, Kamandi, Ahmad
core   +1 more source