Results 31 to 40 of about 174,445 (306)

On-line monitoring system of working face footage based on radar ranging

open access: yesGong-kuang zidonghua, 2018
The working face footage acquired by traditional artificial static measurement technology has non-continuous and poor time-effectiveness, and ca't satisfy requirement of on-line real-time warning.
ZHANG Qinghua   +3 more
doaj   +1 more source

Self-Adaptive Fuzzy Control Approach for Jack-up Rig Jacking System Based on Particle Swarm Optimization

open access: yesIEEE Access, 2022
Many offshore projects, such as offshore oil and gas exploration and offshore wind farm development, have required controlling the position of elevating the hull in a stable and balanced manner in recent years.
Xuan-Kien Dang   +4 more
doaj   +1 more source

Dynamic WIFI Fingerprinting Indoor Positioning System [PDF]

open access: yes, 2014
A technique is proposed to improve the accuracy of indoor positioning systems based on WIFI radio-frequency signals by using dynamic access points and fingerprints (DAFs). Moreover, an indoor position system that relies solely in DAFs is proposed.
Reyes, Omar Costilla
core   +1 more source

Dynamic spatial segmentation strategy based magnetic field indoor positioning system [PDF]

open access: yes, 2020
In this day and age, it is imperative for anyone who relies on a mobile device to track and navigate themselves using the Global Positioning System (GPS).
Du, Yichen
core   +1 more source

Comparing Combinations of Linear and Nonlinear Feedback Terms for Ship Motion Control

open access: yesIEEE Access, 2020
In this article, combinations of linear and nonlinear feedback terms are investigated for 3 degrees-of-freedom pose and velocity control of ships. Nonlinear control algorithms that are found in the literature often have linear feedback terms, which ...
Mikkel Eske Norgaard Sorensen   +2 more
doaj   +1 more source

Application of an on-line trainning predictor/controller to dynamic positioning of floating structures [PDF]

open access: yes, 2010
An on-line training functional-link neural network predictor/controller for dynamic positioning of water surface structures is described in this paper. To develop a neural network for time-evolving systems, the deterministic on-line training model in a ...
李宗翰; Lee, Tzung-hang; Cao, Yusong; Lin, Yen-mi
core   +1 more source

The applications of a time-domain fuzzy logic controller for dynamic positioning of floating structures [PDF]

open access: yes, 2010
In this paper, a fuzzy logic controller for dynamic positioning of floating structures in deep water is presented. The core of the fuzzy controller is a set of fuzzy associative memory (FAM) rules that correlate each group of fuzzy control input sets to ...
李宗翰; Lee, Tzung-hang; Lin, Yen-mi
core   +1 more source

Predefined-Time Hybrid Tracking Control for Dynamic Positioning Vessels Based on Fully Actuated Approach

open access: yesJournal of Marine Science and Engineering
This study investigates the problem of tracking the trajectory of a dynamic positioning (DP) ship under sudden surges of elevated sea states. First, the tracking problem is reformulated as an error calibration problem through the introduction of fully ...
Yujie Xu   +3 more
doaj   +1 more source

Dynamic Positive Equilibrium Problem [PDF]

open access: yesSSRN Electronic Journal, 2001
The Dynamic Positive Equilibrium Problem (DPEP) is a methodology for dealing with time series about economic agents' decisions, regardless of the amount of available information. The approach is articulated in three phases, as in the static counterpart Symmetric Positive Equilibrium Problem (SPEP), with the variant that it must be preceded by the ...
openaire   +3 more sources

YDD-SLAM: Indoor Dynamic Visual SLAM Fusing YOLOv5 with Depth Information

open access: yes, 2023
Simultaneous location and mapping (SLAM) technology is key in robot autonomous navigation. Most visual SLAM (VSLAM) algorithms for dynamic environments cannot achieve sufficient positioning accuracy and real-time performance simultaneously.
Xilai Chen   +6 more
core   +1 more source

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