Results 11 to 20 of about 931,347 (158)

Unstable Pillar Failure under Soft Loading Condition [PDF]

, 2022
Pillar rockburst is an unstable pillar failure and one of the most hazardous problems in the underground mining engineering of deep hard-rock mines. In order to study the mechanism of unstable pillar failure, laboratory tests, numerical simulation, and ...
Wancheng Zhu, Xige Liu, Chen Hou, Hangyu Dong, Kai Guan   +4 more
core   +1 more source

Asymptotic inference for nearly unstable AR(p) processes [PDF]

, 1999
In this paper nearly unstable AR( p) processes (in other words, models with characteristic roots near the unit circle) are studied. Our main aim is to describe the asymptotic behavior of the least-squares estimators of the coefficients.
van Zuijlen, Martien C. A., Pap, Gyula, van der Meer, Tjacco, Meer, T. van der, Zuijlen, M.C.A. van, Pap, G.   +5 more
core   +1 more source

Unstable Crystallographic & Molecular Structures for Machine Learning of System Energies

, 2020
- Augmented-QM9 molecular structures at unstable positions -- augm-qm9-{train,test,valid}.json- Periodic crystal structures at unstable positions -- periodic-al-cu-crystal.json- Finite-sized crystal structures at unstable positions -- scaled-finite ...
Christian Klinke (12293354), Jay Morgan (6847700), Adeline Paiement (10213019)   +2 more
core   +1 more source

On Balancing and Order Reduction of Unstable Periodic Systems [PDF]

, 2001
Abstract: We consider the direct application of balancing techniques to unstable periodic systems by extending the balancing concepts to arbitrary periodic systems. We extend first the balancing concepts to unstable discrete-time systems by defining the
A. Varga, Varga, Andras
core   +1 more source

Evolutionary design of a full–envelope flight control system for an unstable fighter aircraft [PDF]

, 2010
The use of an evolutionary algorithm in the framework of H∞ control theory is being considered as a means for synthesizing controller gains that minimize a weighted combination of the infinite-norm of the sensitivity function (for disturbance attenuation
Edmondo A. Minisci, Avanzini, Giulio, Minisci, Edmondo, Minisci, E.A., Giulio Avanzini   +4 more
core   +4 more sources

Horizontal fracture of the atlas – A rare but unstable C1 fracture

Journal of Craniovertebral Junction and Spine, 2020
Horizontal fractures of the atlas are uncommon fractures associated with instability of the craniocervical junction. Most commonly associated with high-speed motor vehicle accidents, these fractures need to be identified and treated appropriately. Due to
Jennifer Brown, Ajay Hegde
doaj   +1 more source

Angina Pectoris - A general practice review: Part I

South African Family Practice, 1989
No abstract available.
E.L. Murray
doaj   +1 more source

Anomalous Origin of a Stenosed Left Circumflex Coronary Artery in a Patient Presenting with Unstable Angina: A Case Report

Romanian Journal of Internal Medicine, 2016
73 year-old man presented to our emergency department with complaint of retrosternal chest pain since 2 day and admitted with diagnosis of unstable angina.
Vakili Hossein, Khaheshi Isa, Memaryan Mehdi, Naderian Mohammadreza   +3 more
doaj   +1 more source

Stable or Unstable? Evaluating the Strength Outcomes of 12-Week Resistance Training in Youth Judo Athletes

Sports
Background: The purpose of this study was to compare the effects of resistance training on stable versus unstable surfaces on strength performance in young judokas.
Nemanja Stanković, Dušan Stupar, Aleksandar Ignjatović, Nikola Milošević, Nebojša Trajković   +4 more
doaj   +1 more source

CARACTERIZACIÓN DEL SÍNDROME CORONARIO AGUDO SIN ELEVACIÓN DEL ST EN EL CENTRO DIAGNÓSTICO INTEGRAL [PDF]

CorSalud, 2012
Resumen Introducción y objetivos: El síndrome coronario agudo presenta una elevada incidencia en el cuadro de morbilidad y mortalidad de los países del mundo desarrollado.
Rider Piñeiro López, Odette Etchegoyen López, María de los Á. Santana Águila, Leonor Ratia Vargas, José A. Vila González   +4 more
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