Results 11 to 20 of about 4,802 (208)

Precise Locating Control for a Polar Crane Based on Sliding Mode Active Disturbance Rejection Control and Quadratic Programming Algorithm

open access: yesMachines, 2021
A polar crane is a large-scale special lifting equipment operated in a nuclear power plant. To address the precise locating control problem of a polar crane with the center of gravity shifting, with cross-coupling, and with external disturbance, an ...
Xuyang Cao, Zhiwei Wang, Xingang Zhang
doaj   +1 more source

INTEGRATION OF INS AND GNSS FOR GRAVIMETRIC APPLICATION WITH UAS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
The integration based on Inertial Navigation System (INS) and Global Navigation Satellite System (GNSS) has been successfully developed in observing the gravity.
C. A. Lin, K. W. Chiang, C. Y. Kuo
doaj   +1 more source

Analysis of Ionospheric Disturbance Response to the Heavy Rain Event

open access: yesRemote Sensing, 2022
Meteorological activities in the troposphere would affect electron concentrations and distributions in the ionosphere, thereby exciting ionospheric disturbance.
Jian Kong   +3 more
doaj   +1 more source

Optimizing ecological security pattern in the coal resource-based city: A case study in Shuozhou City, China

open access: yesEcological Indicators, 2021
Large-scale mining activities have induced numerous non-negligible eco-geological environmental issues that seriously threaten regional ecological security.
Sucui Li   +4 more
doaj   +1 more source

Similar simulation test study on the influence of mining on shaft deflection of deep soil based on hydraulic permeability model

open access: yesEnergy Exploration & Exploitation, 2023
Ensuring shaft safety is critical in the process of coal mining. During coal mining in the Guotun coal mine, Shandong Province, China, issues, such as shaft deflection, tank channel and shaft deformation, and tank jamming, which did not appear in the ...
Yu Wang   +10 more
doaj   +1 more source

Gravity Compensation Using EGM2008 for High-Precision Long-Term Inertial Navigation Systems

open access: yesSensors, 2016
The gravity disturbance vector is one of the major error sources in high-precision and long-term inertial navigation applications. Specific to the inertial navigation systems (INSs) with high-order horizontal damping networks, analyses of the error ...
Ruonan Wu   +5 more
doaj   +1 more source

A dominant acoustic-gravity mode in the polar thermosphere [PDF]

open access: yesAnnales Geophysicae, 2015
The article presents a summary of the main findings of the systematic study of acoustic-gravity waves (AGWs) in the polar thermosphere. This study was based on the in situ measurements made by the Dynamics Explorer 2 (DE2) spacecraft late in its ...
A. K. Fedorenko   +3 more
doaj   +1 more source

The Modulation Effect on the ELVEs and Sprite Halos by Concentric Gravity Waves Based on the Electromagnetic Pulse Coupled Model

open access: yesAtmosphere, 2021
By employing the finite-difference time-domain method, the processes of electric field variation and morphological development of the optical radiation field of ELVEs and sprite halos were simulated in this article.
Chao Wang   +4 more
doaj   +1 more source

Features of Winter Stratosphere Small-Scale Disturbance during Sudden Stratospheric Warmings

open access: yesRemote Sensing, 2022
We analyzed the characteristics of small-scale wave disturbances emerging during the evolution and transformation of the jet stream (JS) in the winter stratosphere and the lower mesosphere of the northern hemisphere, including the periods of sudden ...
Anna S. Yasyukevich   +4 more
doaj   +1 more source

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