Results 41 to 50 of about 28,907 (158)

Optimisation of virtual cooperative spectrum sensing for UAV‐based interweave cognitive radio system

IET Communications, 2021
In an interweave cognitive radio system, cooperative spectrum sensing has been recognised as a key technology to enable secondary users to opportunistically access licensed spectrum band without harmful interference to primary users.
Jun Wu, Yang Chen, Pei Li, Jia Zhang, Cong Wang, Jifei Tang, Lanhua Xia, Conghui Lu, Tiecheng Song   +8 more
doaj   +1 more source

Physics-Informed Machine Learning for Intelligent Gas Turbine Digital Twins: A Review

Energies
This review surveys recent progress in hybrid artificial intelligence (AI) approaches for gas turbine intelligent digital twins, with an emphasis on models that integrate physics-based simulations and machine learning.
Hiyam Farhat, Amani Altarawneh
doaj   +1 more source

Seasonal Fluctuations and Vertical Heterogeneity of Biochemical–Structural Parameters in Wetland Emergent Aquatic Vegetation

Plant Phenomics
Accurate understanding of vertical patterns of canopy structure characteristics and solar radiation distribution patterns of aquatic vegetation is pivotal in formulating a bidirectional reflection model and comprehending the ecological dynamics of ...
Huaijing Wang, Yunmei Li, Jianguang Wen, Gaolun Wang, Huaiqing Liu, Heng Lyu   +5 more
doaj   +1 more source

Detection of Catchment-Scale Gully-Affected Areas Using Unmanned Aerial Vehicle (UAV) on the Chinese Loess Plateau

ISPRS International Journal of Geo-Information, 2016
The Chinese Loess Plateau suffers from serious gully erosion induced by natural and human causes. Gully-affected areas detection is the basic work in this region for gully erosion assessment and monitoring. For the first time, an unmanned aerial vehicle (
Kai Liu, Hu Ding, Guoan Tang, Jiaming Na, Xiaoli Huang, Zhengguang Xue, Xin Yang, Fayuan Li   +7 more
doaj   +1 more source

Predictive multiuser redirected walking using artificial potential fields

Frontiers in Virtual Reality
Real walking is considered as the best locomotion metaphor to explore virtual environments in terms of user experience. In addition to being intuitive for the user, walking captures the true feelings of motion since the visual and proprioceptive ...
Christian Hirt, Noah Isaak, Christian Holz, Andreas Kunz   +3 more
doaj   +1 more source

Interpreting the Fuzzy Semantics of Natural-Language Spatial Relation Terms with the Fuzzy Random Forest Algorithm

ISPRS International Journal of Geo-Information, 2018
Naïve Geography, intelligent geographical information systems (GIS), and spatial data mining especially from social media all rely on natural-language spatial relations (NLSR) terms to incorporate commonsense spatial knowledge into conventional GIS and ...
Xiaonan Wang, Shihong Du, Chen-Chieh Feng, Xueying Zhang, Xiuyuan Zhang   +4 more
doaj   +1 more source

Fatigue Analysis of a Jacket-Supported Offshore Wind Turbine at Block Island Wind Farm

Sensors
Offshore wind-turbine (OWT) support structures are subjected to cyclic dynamic loads with variations in loadings from wind and waves as well as the rotation of blades throughout their lifetime.
Nasim Partovi-Mehr, John DeFrancisci, Mohsen Minaeijavid, Babak Moaveni, Daniel Kuchma, Christopher D. P. Baxter, Eric M. Hines, Aaron S. Bradshaw   +7 more
doaj   +1 more source

Regression-Based Networked Virtual Buoy Model for Offshore Wave Height Prediction

Journal of Marine Science and Engineering
Accurate wave height measurements are critical for offshore wind farm operations, marine navigation, and environmental monitoring. Wave buoys provide essential real-time data; however, their reliability is compromised by harsh marine conditions ...
Eleonora M. Tronci, Matteo Vitale, Therese Patrosio, Thomas Søndergaard, Babak Moaveni, Usman Khan   +5 more
doaj   +1 more source

Optimisation of the spatial configuration of microphones for robust virtual sensing in a diffuse sound field

Acta Acustica
Virtual sensing methods are utilised in active noise control systems where the error sensors cannot be placed at the locations where control is physically required.
Kappis Achilles, Cheer Jordan
doaj   +1 more source

Virtual sensing for gearbox condition monitoring based on kernel factor analysis

Petroleum Science, 2017
Vibration and oil debris analysis are widely used in gearbox condition monitoring as the typical indirect and direct sensing techniques. However, they have their own advantages and disadvantages. To better utilize the sensing information and overcome its
Jin-Jiang Wang, Ying-Hao Zheng, Lai-Bin Zhang, Li-Xiang Duan, Rui Zhao   +4 more
doaj   +1 more source