Results 21 to 30 of about 51,255 (199)

Adaptive Polynomial Guidance With Impact Angle Constraint Under Varying Velocity

IEEE Access, 2019
Considering the velocity of the missile cannot remain constant in most applications due to the effect of aerodynamic drag and thrust, a feasible adaptive impact angle control guidance law under varying velocity is proposed.
Zhongtao Cheng, Bo Wang, Lei Liu, Yongji Wang   +3 more
doaj   +1 more source

Adaptive Dynamic Surface Control for Aircraft With Multiple Disturbances Based on Radial Basis Network

IEEE Access, 2020
In this paper, an adaptive dynamic surface control (DSC) method based on neural network for the flight path angle of an aircraft is investigated in view of the parameters uncertainty, multi-disturbance and nonlinearity of the aircraft.
Xu Li, Wenzhe Fu, Lei Liu, Yongji Wang
doaj   +1 more source

Imaging Diagnostics Coupled with Non-Invasive and Micro-Invasive Analyses for the Restoration of Ethnographic Artifacts from French Polynesia

Heritage, 2022
In this paper, two different objects from the ethnographic collection of the museum of the Congregation of the Sacred Hearts of Jesus and Mary (Rome), a Polynesian barkcloth (tapa) and a Polynesian headdress in feathers (pa’e ku’a), were investigated to ...
Claudia Colantonio, Luca Lanteri, Alessandro Ciccola, Ilaria Serafini, Paolo Postorino, Erminia Censorii, Doinita Rotari, Claudia Pelosi   +7 more
doaj   +1 more source

A Novel Parameter-Variabled and Coupled Chaotic System and Its Application in Image Encryption with Plaintext-Related Key Concealment

Entropy
The design of a chaotic system and pseudo-random sequence generation method with excellent performance and its application in image encryption have always been attractive and challenging research fields.
Zuxi Wang, Siyang Wang, Zhong Chen, Boyun Zhou   +3 more
doaj   +1 more source

A Cuboid Bi-Level Log Operator for Action Classification

IEEE Access, 2018
We propose a 3-D cuboid bi-level Laplacian-of-Gaussian (CBLoG) operator with high speed and invariant space-time scale for detecting abrupt changes of signals in videos.
Kaibo Yao, Nong Sang, Changxin Gao
doaj   +1 more source

A Coordination Law for Multiple Air Vehicles in Distributed Communication Scenarios

Journal of Advanced Transportation, 2020
This paper proposes a consensus-based guidance methodology for multiple air vehicles to arrive at the same spot cooperatively. First, based on the Lyapunov stability theory, a guidance law with only one control parameter is proposed, and the exact ...
Zhongtao Cheng, Mao Su, Lei Liu, Bo Wang, Yongji Wang   +4 more
doaj   +1 more source

Deep Multimodal Fusion Model for Building Structural Type Recognition Using Multisource Remote Sensing Images and Building-Related Knowledge

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Building structural type (BST) information is vital for seismic risk and vulnerability modeling. However, obtaining this kind of information is not a trivial task.
Yuhang Zhou, Yihua Tan, Qi Wen, Wei Wang, Lingling Li, Zhenxing Li   +5 more
doaj   +1 more source

Multispectral Photogrammetry

Digital Humanities in the Nordic and Baltic Countries Publications, 2019
The Ny Carlsberg Glyptotek and Rigsters 3D are exploring the potential of merging photogrammetry and multispectral imaging (MSI). MSI is a widely employed photographic method of analysis in studies of ancient polychromy. The collaboration has resulted in the first 3D model including visible-induced infrared luminescence (VIL) imaging, illustrating ...
Signe Buccarella Hedeaard, Cecilie Brøns, Iulian Drug, Pavel Saulins, Cristian Bercu, Aleksandr Jakovlev, Lars Kjær   +6 more
openaire   +1 more source

Improved Hybrid Fireworks Algorithm-Based Parameter Optimization in High-Order Sliding Mode Control of Hypersonic Vehicles

Complexity, 2018
With respect to the nonlinear hypersonic vehicle (HV) dynamics, achieving a satisfactory tracking control performance under uncertainties is always a challenge. The high-order sliding mode control (HOSMC) method with strong robustness has been applied to
Xiaomeng Yin, Xing Wei, Lei Liu, Yongji Wang   +3 more
doaj   +1 more source

Fixed-Time Convergent Guidance Law with Impact Angle Control

Complexity, 2020
The existing convergence control guidance laws are designed via the Lyapunov asymptotic stability theory or finite-time stability theory. However, guidance law based on the Lyapunov asymptotic stability theory would lead the states to zero only as time ...
Zhongtao Cheng, Hao Wu, Bo Wang, Lei Liu, Yongji Wang   +4 more
doaj   +1 more source