Results 11 to 20 of about 1,181,239 (240)

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

A numerical investigation of horizontal viscous gravity currents [PDF]

open access: yes, 2009
We study numerically the viscous phase of horizontal gravity currents of immiscible fluids in the lock-exchange configuration. A numerical technique capable of dealing with stiff density gradients is used, allowing us to mimic high-Schmidt-number ...
Hallez, Yannick, Magnaudet, Jacques
core   +1 more source

Nonlinear Horizontal Diffusion for GCMs [PDF]

open access: yes, 2007
The mixing-length-based parameterization of horizontal diffusion, which was originally proposed by Smagorinsky, is revisited. The complete tendencies of horizontal momentum diffusion, the associated frictional heating, and horizontal diffusion of ...
Becker, Erich, Burkhardt, Ulrike
core   +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

Free-convection condensation on single horizontal pin-fin tubes [PDF]

open access: yes, 2011
PhDNew experimental data are reported for free-convection condensation of ethylene glycol and R-113 on three-dimensional pin-fin tubes. Effects of pin geometry and tube thermal conductivity (for copper, brass and bronze giving a mean range of 400, 120 ...
Ali, Hafiz-Muhummad
core   +4 more sources

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