Results 21 to 30 of about 1,040,988 (296)

An iterative Wiener filtering method based on the gravity gradient invariants

Geodesy and Geodynamics, 2015
How to deal with colored noises of GOCE (Gravity field and steady – state Ocean Circulation Explorer) satellite has been the key to data processing. This paper focused on colored noises of GOCE gradient data and the frequency spectrum analysis. According
Rui Zhou, Xiaoping Wu
doaj   +1 more source

Size-Dependent Behaviour of Representative Volume Element for Granular Material under Gravity-Induced Stress Gradient

Advances in Materials Science and Engineering, 2022
Gravity is the primary load source in geotechnical engineering, and its effect becomes extremely important in these cases such as lunar research station construction and in situ resource utilization. However, at the current stage, the study on the effect
Ruilin Li, Yukun Ji, Jun Chen, Daqing Chen, Shangyue Cai   +4 more
doaj   +1 more source

High-Resolution Cooperate Density-Integrated Inversion Method of Airborne Gravity and Its Gradient Data

Remote Sensing, 2021
Airborne (or satellite) gravity measurement is a commonly used remote sensing method to obtain the underground density distribution. Airborne gravity gradiometry data have a higher horizontal resolution to shallower causative sources than airborne ...
Guoqing Ma, Tong Gao, Lili Li, Taihan Wang, Runxin Niu, Xinwei Li   +5 more
doaj   +1 more source

(2+1) gravity for higher genus in the polygon model [PDF]

, 2004
We construct explicitly a (12g − 12)-dimensional space P of unconstrained and independent initial data for ’t Hooft’s polygon model of (2+1) gravity for vacuum spacetimes with compact genus-g spacelike slices, for any g ≥ 2.
Kádár, Zoltán, Kadar, Z., Dep Natuurkunde, Quantum Gravity, Strings and Elementary Particles, Loll, R., Universiteit Utrecht   +5 more
core   +2 more sources

A locally finite model for gravity [PDF]

, 2008
Matter interacting classically with gravity in 3+1 dimensions usually gives rise to a continuum of degrees of freedom, so that, in any attempt to quantize the theory, ultraviolet divergences are nearly inevitable.
't Hooft, G., Gerard ’t Hooft, Dep Natuurkunde, Quantum Gravity, Strings and Elementary Particles   +3 more
core   +2 more sources

Interpreting Quantum Gravity. [PDF]

, 2005
This is an essay review of two textbooks on quantum gravity by Carlo Rovelli and Claus ...
Dean Rickles, Rickles, Dean
core   +1 more source

Is Gravity an Entropic Force? [PDF]

, 2011
The remarkable connections between gravity and thermodynamics seem to imply that gravity is not fundamental but emergent, and in particular, as Verlinde suggested, gravity is probably an entropic force.
Shan, Gao, Shan Gao
core   +1 more source

Vertical gravity gradient modeling and its influence on gravity datum transfer

Geodesy and Geodynamics
In the past, the free-air gradient −308.6 × 10−8 s−2 was used as the vertical gravity gradient of the measuring point in gravity data processing, which resulted in inaccurate instrument height corrections.
Tianxiang Zhou, Hongbo Tan, Guangliang Yang, Rugang Xu, Xinlin Zhang, Jiapei Wang, Sheng Liu, Hengzhou Meng, Ziheng Chen   +8 more
doaj   +1 more source

International trade without CES : estimating translog gravity [PDF]

, 2012
This paper derives a micro-founded gravity equation based on a translog demand system that allows for flexible substitution patterns across goods. In contrast to the standard CES-based gravity equation, translog gravity generates an endogenous trade cost
Novy, Dennis
core   +1 more source

Laboratory dynamic accuracy evaluation method and system verification for gravity gradiometer

地震科学进展
To meet the demand for reliably evaluating the measurement accuracy of the gravity gradiometer under dynamic conditions, a method for dynamically assessing the accuracy of the gravity gradiometer in a laboratory setting was proposed.
Da Li, Chengsuo Li, Wei Gao, Zishan Zhang, Li Wu, Zhong Li   +5 more
doaj   +1 more source