Results 21 to 30 of about 251,071 (299)

Identification and Optimal Control for Surge and Swab Pressure Reduction While Performing Offshore Drilling Operations [PDF]

open access: yesModeling, Identification and Control, 2020
In this paper, an unscented Kalman filter coupled with a nonlinear model-predictive controller for a hydraulic wellbore model with multi-variable control and tracking is presented. In a wellbore, high drill string velocities in operational sequences such
Njål Tengesdal, Christian Holden
doaj   +1 more source

Maximum Power Point Tracking and Voltage Regulation of Two-Stage Grid-Tied PV System Based on Model Predictive Control

open access: yesEnergies, 2020
This paper proposes a maximum power point tracking (MPPT) and voltage regulation method based on model predictive control (MPC) for the two-stage grid-tied photovoltaic (PV) system, which can achieve MPPT and output voltage regulation of a PV system ...
Miaomiao Ma, Xiangjie Liu, Kwang Y. Lee
doaj   +1 more source

Polytraumatized patient lower extremity nonunion development: Raw data

open access: yesData in Brief, 2021
In this article we report data collected to evaluate the pathomechanistic effect of acute anaerobic metabolism in the polytraumatized patient and its subsequent effect on fracture nonunion; see “Base Deficit ≥6 within 24 Hours of Injury is a Risk Factor ...
Neil R. Sardesai   +7 more
doaj   +1 more source

Peoples Income and Consumption Pattern during & before COVID-19 Pandemic: A Study in the Northern Areas of Bangladesh [PDF]

open access: yesInternational Journal of Management, Accounting and Economics, 2022
The SARS COV2 pandemic hits the life and livelihoods of millions and consequently slows down the world economy. The pandemic hits hard the specific social groups due to travel restrictions/bans and other regulations that affect their income and ...
Mohammad Nazmus Sakib   +2 more
doaj   +1 more source

A Review of Different Configurations and Control Techniques for DSTATCOM in the Distribution system [PDF]

open access: yesE3S Web of Conferences, 2021
This paper presents a review of DSTATCOM Topologies and power quality control Techniques. The used topologies are Three-phase Three-wire and Three-phase four-wire and control techniques are Instantaneous reactive power theory(IRP), Synchronous Reference ...
Sree Jyothi Khammampati R   +2 more
doaj   +1 more source

Model predictive ship trajectory tracking system based on line of sight method [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2023
Maritime Autonomous Surface Ships (MASS) perfectly fit into the future vision of merchant fleet. MASS autonomous navigation system combines automatic trajectory tracking and supervisor safe trajectory generation subsystems.
Anna Miller
doaj   +1 more source

Local galaxy flows within 5 Mpc [PDF]

open access: yes, 2002
We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates. We derive their distances from the luminosity of the tip of the red giant branch stars with a typical accuracy of ~12 ...
A. E. Dolphin   +76 more
core   +2 more sources

Conclave: secure multi-party computation on big data (extended TR) [PDF]

open access: yes, 2019
Secure Multi-Party Computation (MPC) allows mutually distrusting parties to run joint computations without revealing private data. Current MPC algorithms scale poorly with data size, which makes MPC on "big data" prohibitively slow and inhibits its ...
Araki Toshinori   +20 more
core   +1 more source

A Dynamic Artificial Potential Field (D-APF) UAV Path Planning Technique for Following Ground Moving Targets

open access: yesIEEE Access, 2020
Path planning is a vital and challenging component in the support of Unmanned Aerial Vehicles (UAVs) and their deployment in autonomous missions, such as following ground moving target.
Herath Mpc Jayaweera, Samer Hanoun
doaj   +1 more source

Galaxy Clustering in Early SDSS Redshift Data [PDF]

open access: yes, 2001
We present the first measurements of clustering in the Sloan Digital Sky Survey (SDSS) galaxy redshift survey. Our sample consists of 29,300 galaxies with redshifts 5,700 km/s < cz < 39,000 km/s, distributed in several long but narrow (2.5-5 degree ...
Anderson, Scott F.   +68 more
core   +2 more sources

Home - About - Disclaimer - Privacy