Results 31 to 40 of about 41,704 (260)

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

An Aided Navigation Method Based on Strapdown Gravity Gradiometer

Sensors, 2021
The gravity gradient is the second derivative of gravity potential. A gravity gradiometer can measure the small change of gravity at two points, which contains more abundant navigation and positioning information than gravity.
Duanyang Gao, Baiqing Hu, Lubin Chang, Fangjun Qin, Xu Lyu   +4 more
doaj   +1 more source

An Expression for Gravity Generated by an Anomalous Geological Body and Its Application in Bathymetry Inversion [PDF]

Journal of Geodesy and Geoinformation Science, 2021
The gravity anomaly and vertical gravity gradient due to anomalous geological bodies are mainly computed by numerical methods, so it is difficult and time-consuming to use the gravity-geological method to invert seafloor topography.
Huan XU,Jinhai YU,Xiaoyun WAN,Lei LIANG
doaj   +1 more source

Galanin and Adrenomedullin Plasma Responses During Artificial Gravity on a Human Short-Arm Centrifuge

Frontiers in Physiology, 2019
Galanin and adrenomedullin plasma responses to head-up tilt and lower body negative pressure have been studied previously. However, to what extent short-arm human centrifugation (SAHC) affects these responses is not known.
Julia Winter, Charles Laing, Charles Laing, Bernd Johannes, Edwin Mulder, Bianca Brix, Andreas Roessler, Johannes Reichmuth, Joern Rittweger, Joern Rittweger, Nandu Goswami   +10 more
doaj   +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

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

An integrated method for gravity gradient inversion and gravity gradient depth imaging

Geophysical Journal International
SUMMARY Gravity gradient data can show the structural features of geological bodies in the shallow lithosphere with higher sensitivity and resolution than conventional gravity data. Gravity gradient inversion can be applied to obtain the lithospheric density structures of geological bodies. However, as with gravity data, gravity gradient
Yu Tian, Jinzhao Liu, Qing Ye, Lei Shi, Yong Wang, Jörg Ebbing   +5 more
openaire   +1 more source

AscF in the mycobacterial CIII–CIV supercomplex lacks metal and nucleotide binding but links malate oxidation to respiration

FEBS Letters, EarlyView.
The mycobacterial CIII‐CIV respiratory supercomplex is an obligate assembly, encompassing several subunits of unknown functions. We have characterized the intracellular subunit AscF, and show that it is unlikely to be a sensor for metals or nucleotides, but is required for growth on nonfermentable energy sources, and likely works as an adapter for ...
Eni Rile, Riccardo Diamanti, Daniel Lundin, Soni Sharma, Robin Lissner, Coenraad P. Kuil, Martin Högbom, Dirk Bald, Dan Sjöstrand   +8 more
wiley   +1 more source

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane, Salama Makni, Mourad Kchaou, Ahmed El Hajjaji   +3 more
wiley   +1 more source

Self-Gradient Compensation of Full-Tensor Airborne Gravity Gradiometer

Sensors, 2019
In the process of airborne gravity gradiometry for the full-tensor airborne gravity gradiometer (FTAGG), the attitude of the carrier and the fuel mass will seriously affect the accuracy of gravity gradiometry.
Xuewu Qian, Yanhua Zhu
doaj   +1 more source