Results 11 to 20 of about 179,912 (264)

Model-free optimal anti-slug control of a well-pipeline-riser in the K-Spice/LedaFlow simulator [PDF]

open access: yesModeling, Identification and Control, 2015
Simplified models are developed for a 3-phase well-pipeline-riser and tested together with a high fidelity dynamic model built in K-Spice and LedaFlow. These models are developed from a subspace algorithm, i.e.
Christer Dalen   +2 more
doaj   +1 more source

Epidemiology and Mortality of Cryptococcal Disease in Guatemala: Two-Year Results of a Cryptococcal Antigen Screening Program

open access: yesMicroorganisms, 2022
Cryptococcal disease is an important opportunistic infection among people living with HIV. The cryptococcal antigen (CrAg) can be detected before the clinical onset of meningitis and its screening is recommended.
Narda Medina   +6 more
doaj   +1 more source

A globally stable autopilot with wave filter using only yaw angle measurements [PDF]

open access: yesModeling, Identification and Control, 1996
A stable minimum phase transfer function from rudder angle to yaw angle is used to design a globally stable adaptive ship autopilot. First-order wave disturbances in yaw are filtered by applying a notch filter.
Trygve Lauvdal, Thor I. Fossen
doaj   +1 more source

A Rapid Screening Program for Histoplasmosis, Tuberculosis, and Cryptococcosis Reduces Mortality in HIV Patients from Guatemala

open access: yesJournal of Fungi, 2021
Opportunistic infections (OIs) and advanced HIV disease (AHD) contribute to HIV-related mortality. Here, we analyzed the situation of AHD and OIs in a cohort of newly diagnosed HIV patients from Guatemala.
Narda Medina   +9 more
doaj   +1 more source

Twistor Actions for Integrable Systems [PDF]

open access: yesJournal of High Energy Physics, 2021
AbstractMany integrable systems can be reformulated as holomorphic vector bundles on twistor space. This is a powerful organizing principle in the theory of integrable systems. One shortcoming is that it is formulated at the level of the equations of motion. From this perspective, it is mysterious that integrable systems have Lagrangians. In this paper,
openaire   +3 more sources

Effective Actions for Regge Piecewise Flat Quantum Gravity

open access: yesUniverse, 2022
We review the construction of the path integral and the corresponding effective action for the Regge formulation of General Relativity under the assumption that the short-distance structure of the spacetime is not a smooth 4-manifold, but a piecewise ...
Aleksandar Miković
doaj   +1 more source

A Combined Methodology of H∞ Fuzzy Tracking Control and Virtual Reference Model for a PMSM

open access: yesAdvances in Electrical and Electronic Engineering, 2015
The aim of this paper is to present a new fuzzy tracking strategy for a permanent magnet synchronous machine (PMSM) by using Takagi-Sugeno models (T-S).
Djamel Ounnas   +3 more
doaj   +1 more source

SYNTHESIS OF FAULT ESTIMATION OBSERVER, BASED ON SPECTRAL MIMO H2 OPTIMIZATION

open access: yesСовременные информационные технологии и IT-образование, 2018
This paper is devoted to slowly varying additive fault detection with implementation of the observer-filter to be designed. Sensitivity of the observer to the external disturbance is to be minimized by the choice of its parameters.
Evgeny I. Veremey, Yaroslav V. Knyazkin
doaj   +1 more source

Computational Validation of the Best Tuning Method for a Vehicle-Integrated PID Controller

open access: yesModelling and Simulation in Engineering, 2022
This paper validates and analyzes the robustness of the proportional-integral-derivative (PID) action controller from an open transfer function that integrates a proportional-integral (PI) action controller to obtain the response of a robust action ...
Calequela J. T. Manuel   +3 more
doaj   +1 more source

Impact of the COVID-19 pandemic on HIV care in Guatemala

open access: yesInternational Journal of Infectious Diseases, 2021
Objectives: To describe the impact of the coronavirus disease 2019 (COVID-19) pandemic on the diagnosis of human immunodeficiency virus (HIV) and deaths from opportunistic infections in Guatemala.
Narda Medina   +23 more
doaj   +1 more source

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