Results 21 to 30 of about 157,311 (159)

Chromatin Dynamics and Gene Positioning [PDF]

Cell, 2008
The mammalian cell nucleus provides a landscape where genes are regulated through their organization and association with freely diffusing proteins and nuclear domains. In many cases, specific genes are highly dynamic, and the principles governing their movements and interchromosomal interactions are currently under intensive study.
Kumaran, R. Ileng, Thakar, Rajika, Spector, David L.   +2 more
openaire   +2 more sources

Positional Preferences and Efficiency in a Dynamic Economy [PDF]

SSRN Electronic Journal, 2020
AbstractIn an endogenous growth model, we characterize the conditions under which positional preferences for consumption and wealth do not cause inefficiency and derive an optimal tax policy response in cases where these conditions are not satisfied. The concerns for relative consumption and relative wealth partly emanate from social comparisons with ...
Thomas Aronsson, Sugata Ghosh, Ronald Wendner   +2 more
openaire   +6 more sources

Dynamic positioning of ships based on robust fuzzy observer

The Journal of Engineering, 2020
In this study, the robust fuzzy observer-based control scheme for the dynamic positioning of marine vessels is presented. The proposed controller assumes that the environmental disturbances are unknown but bounded with known upper limit.
Werneld Ngongi, Jialu Du, Erick Massami, Wen-Jer Chang, Eliamin Kassembe   +4 more
doaj   +1 more source

Prediction of Loss of Position during Dynamic Positioning Drilling Operations Using Binary Logistic Regression Modeling

Journal of Marine Science and Engineering, 2021
The prediction of loss of position in the offshore industry would allow optimization of dynamic positioning drilling operations, reducing the number and severity of potential accidents.
Zaloa Sanchez-Varela, David Boullosa-Falces, Juan Luis Larrabe Barrena, Miguel A. Gomez-Solaeche   +3 more
doaj   +1 more source

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

Gong-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, NING Xiaoliang, ZHAO Xusheng, DENG Ganbo   +3 more
doaj   +1 more source

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

IEEE 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, Tien-Dat Tran, Viet-Dung Do, Le Anh-Hoang Ho, Van-Vang Le   +4 more
doaj   +1 more source

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

IEEE 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, Morten Breivik, Roger Skjetne   +2 more
doaj   +1 more source

RFID dynamic positioning method

Tongxin xuebao, 2013
A novel proximity method-RFID dynamic positioning method was presented,using a moving radio frequency identification (RFID) reader to accurately position the target based on reference tag arrays.The major advantage of the method was that through reading ...
Cheng LI, Song-rong QIAN
doaj   +2 more sources

Positive Affect Dynamics

Current Directions in Psychological Science
Positive affect is a fundamental component of well-being, influencing multiple domains of psychological and physical functioning. This article synthesizes empirical research on positive affect dynamics in naturalistic contexts, emphasizing their associations with mental- and physical-health outcomes.
Anthony D. Ong, Egon Dejonckheere, Nilàm Ram   +2 more
openaire   +2 more sources

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

Journal 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, Yingjie Wang, Mingyu Fu, Hao Chen   +3 more
doaj   +1 more source