Results 131 to 140 of about 192,292 (306)

A Uniform Error Bound for Overrelaxation Methods

open access: yes, 1995
Let Ax = b be a system of linear equations where A is symmetric and positive definite. Suppose that the associated block Jacobi matrix B is consistently ordered, weekly cyclic of index 2, and convergent [i.e., μ1 ≔ ϱ(B) \u3c 1].
Li, Xiezhang
core  

Discordance Between Systemic Lupus Erythematosus Disease Activity Index Domain Weights and Their Association With Organ Damage Accrual

open access: yesArthritis Care &Research, EarlyView.
Objective Studies of damage accrual in patients with systemic lupus erythematosus (SLE) show associations with disease activity measured by the SLE Disease Activity Index 2000 (SLEDAI‐2K), but these associations are imperfect. SLEDAI scores are powerfully influenced by weightings (1–8) assigned to each domain.
Kevin Zhang   +8 more
wiley   +1 more source

Weiss–Weinstein Bound of Frequency Estimation Error for Very Weak GNSS Signals

open access: yesNavigation
Tightness remains the primary goal in all modern estimation bounds. For very weak signals, tightness is enabled by appropriately selecting the prior probability distribution and bound family.
Xin Zhang   +4 more
doaj   +1 more source

On the upper bound of the size of the r-cover-free families

open access: yes, 1994
Let T (r; n) denote the maximum number of subsets of an n-set satisfying the condition in the title. It is proved in a purely combinatorial way, that for n sufficiently large log 2 T (r; n) n 8 \Delta log 2 r r 2 holds. 1.
Miklós Ruszinko, Ruszinkó, Miklós
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

The Randomized American Option as a Classical Solution to the Penalized Problem

open access: yesJournal of Function Spaces, 2015
We connect the exercisability randomized American option to the penalty method by showing that the randomized American option value u is the unique classical solution to the Cauchy problem corresponding to the canonical penalty problem for American ...
Guillaume Leduc
doaj   +1 more source

Adaptive Observer for Coupled Wave PDE and Infinite ODE With Sampled Data and Unknown Input: Application to Brain Hemodynamics Estimation

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir   +2 more
wiley   +1 more source

Ionization and temperature measurements in warm dense copper using x-ray absorption spectroscopy

open access: yesPhysical Review Research
We detail experimental results inferring ionization and temperature for warm dense copper plasmas at several times solid density (15–25 g/cm^{3}) and temperatures of 10–21 eV.
T. Cordova   +14 more
doaj   +1 more source

Bias and Efficiency of Uniform Bid Design in Contingent Valuation

open access: yes
While contingent valuation (CV) methods have experienced growing popularity for estimating the willingness to pay for nonmarket goods and services, optimal bid designs for CV that provide guidance in bid point placement often render themselves ...
Kim, Sooil
core  

A Simple Proof of the Uniform Consensus Synchronous Lower Bound

open access: yes, 2002
We give a simple and intuitive proof of a f + 2 round lower bound for uniform ...
Idit Keidar, Sergio Rajsbaum
core  

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