Results 31 to 40 of about 145,730 (199)

Word Weapons? Letters to Editors

, 2022
This short commentary argues that academic letters to editors on politically-contested topics must be treated with particular ethical care. The interface between science and Māori/Indigenous knowledge is one such topic, vulnerable to inadequate but ...
Stewart, G
core   +1 more source

Multiple Leap Maneuver Trajectory Design and Tracking Method Based on Prescribed Performance Control during the Gliding Phase of Vehicles

International Journal of Aerospace Engineering
A novel standard trajectory design and tracking guidance used in the multiple active leap maneuver mode for hypersonic glide vehicles (HGVs) is proposed in this paper.
Taotao Zhang, Jun Zhang, Sen Shen, Weiyi Chen   +3 more
doaj   +1 more source

Marine Trajectory Reconstruction Method Based on Navigation State Recognition and Bi-Directional Kinematic Interpolation

Journal of Marine Science and Engineering
The trajectory data mining and analysis of maritime targets are of great significance in furthering the construction of maritime traffic facilities, improving the ability of marine supervision and maintaining national marine security.
Yifei Liu, Zhangsong Shi, Bing Fu, Huihui Xu, Hao Wu   +4 more
doaj   +1 more source

Understanding Thermodynamic and Kinetic Stabilization of FeNiZr via Systematic High-Throughput In Situ XRD Analysis

Metals, 2020
The role of kinetically and thermodynamically driven microstructural evolution on FeNiZr was explored through in situ XRD analysis. A statistical approach based on log-likelihoods and composite link model was used to fit and extract important data from ...
Efraín Hernández-Rivera, Sean J. Fudger, B. Chad Hornbuckle, Anthony J. Roberts, Kristopher A. Darling   +4 more
doaj   +1 more source

Helium bubble characterization in tritium aged austenitic stainless steels

Nuclear Materials and Energy
Tritium, as an isotope of hydrogen, permeates throughout most known materials and decays over time into 3 He causing both hydrogen and helium embrittlement.
Daniel Morrall, Tim Krentz, Natalie Wieber, Gavin Mattingly, Dale Hitchcock   +4 more
doaj   +1 more source

Radar Error Correction Method Based on Improved Sparrow Search Algorithm

Applied Sciences
Aiming at the problem of the limited application range and low accuracy of existing radar calibration methods, this paper studies the radar calibration method based on cooperative targets, and establishes the integrated radar measurement error model ...
Yifei Liu, Zhangsong Shi, Bing Fu, Huihui Xu   +3 more
doaj   +1 more source

Analysis of underwater plasma discharge based on equivalent circuit parameters

AIP Advances, 2021
The control of discharge mode and the optimization of energy efficiency are of particular concern as the significant impact on the application of the underwater plasma discharge system.
Liang Qiao, Xiaobing Zhang, Bing Yan, Zhen Han, Chao Yang, Yang Liu   +5 more
doaj   +1 more source

Mixed-Sensitivity H_∞ Position Control for PMSM Based on Triple-Loop Structure With Anti-Windup PI and Robust Outer Loop Design

IEEE Access
To improve the control accuracy and robustness of permanent magnet synchronous motors (PMSMs) under complex operating conditions, this paper proposes a triple closed-loop position control strategy based on mixed-sensitivity H ${}_{\infty } $ control. In
Guanyue Zhang, Chunguang Liu, Dong Yuan, Jiaqi Li   +3 more
doaj   +1 more source

Nonlinear Model Predictive Control for Heavy-Duty Hybrid Electric Vehicles Using Random Power Prediction Method

IEEE Access, 2020
A primary challenge to the implementation of hybrid electric vehicles (HEVs) is the design of the energy management strategy for the vehicle. Most conventional strategies have been designed for passenger vehicles using rule-based or optimization-based ...
Luming Chen, Zili Liao, Xiaojun Ma
doaj   +1 more source

Analysis of the Magnus Moment Aerodynamic Characteristics of Rotating Missiles at High Altitudes

International Journal of Aerospace Engineering, 2021
The Magnus moment characteristics of rotating missiles with Mach numbers of 1.3 and 1.5 at different altitudes and angles of attack were numerically simulated based on the transition SST model.
Yihang Xu, Shaosong Chen, Hang Zhou
doaj   +1 more source