Results 131 to 140 of about 5,774,152 (370)

Applications of partial orderings to the study of positive definiteness, monotonicity, and convergence of iterative methods for linear systems [PDF]

Applications of partial orderings to study of positive definiteness, monotonicity, and convergence of iterative methods for linear ...
Vandergraft, J. S.
core   +1 more source

Process Resilience under Optimal Data Injection Attacks

AIChE Journal, Volume 71, Issue 8, August 2025.
Abstract In this article, we study the resilience of process systems in an information‐theoretic framework, from the perspective of an attacker capable of optimally constructing data injection attacks. The attack aims to distract the stationary distributions of process variables and stay stealthy, simultaneously.
Xiuzhen Ye, Wentao Tang
wiley   +1 more source

The positive-definite completion problem

Transactions of the American Mathematical Society
We study the positive-definite completion problem for kernels on a variety of domains and prove results concerning the existence, uniqueness, and characterization of solutions. In particular, we study a special solution called the canonical completion which is the reproducing kernel analogue of the determinant-maximizing completion known to exist for ...
Waghmare, Kartik G., Panaretos, Victor M.   +1 more
openaire   +2 more sources

Positivity and positive definiteness in generalized function algebras

Journal of Mathematical Analysis and Applications, 2007
AbstractThe definitions of positivity and positive definiteness are extended to generalized function algebras in coherence with the corresponding notions for distributions. Versions of Bochner's theorem for a positive definite Colombeau generalized function are given.
Oberguggenberger, Michael, Pilipović, Stevan, Scarpalézos, Dimitris   +2 more
openaire   +3 more sources

Canonical positive definite matrices under internal linear transformations [PDF]

, 1950
Bernard Vinograde
openalex   +1 more source

Multistable Composite Laminate Grids as a Design Tool for Soft Reconfigurable Multirotors

Advanced Intelligent Systems, EarlyView.
Flexible, lightweight, stable: the reconfigurable multirotor combines stable flight in multiple shapes with low‐energy reconfiguration. Utilizing optimized multistable composites, it achieves self‐locking in open and folded configurations, cutting width‐span by 48% and allowing for safe gap traversal.
Luca Girardi, Giada Risso, Laura Pesaresi, Paolo Ermanni, Stefano Mintchev   +4 more
wiley   +1 more source

Strictly Positive Definite Functions

Journal of Approximation Theory, 1996
AbstractWe give a complete characterization of the strictly positive definite functions on the real line. By Bochner's theorem, this is equivalent to proving that if the separated sequence of real numbers {an} describes the points of discontinuity of a distribution function, there exists an almost periodic polynomial with the zeros {an}.
openaire   +2 more sources

Integral representations of positive definite functions [PDF]

, 1953
Allen Devinatz
openalex   +1 more source

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai, Yefeng Yang, Tao Huang, Boyang Li   +3 more
wiley   +1 more source

Some theorems on the Fourier analysis of positive definite functions [PDF]

, 1965
Leopold Schmetterer
openalex   +2 more sources