Results 1 to 10 of about 129,096 (265)
A gravity model for emergency departments. [PDF]
Sci RepAbstract The issue of facility location is of significant importance in numerous systems, where the efficient utilisation of resources is of great importance. Gravity models, which are inspired by Newtonian physics, are commonly employed to address these problems and have a long tradition of being used in healthcare.
Bertolotti F +3 more
europepmc +4 more sources
THE GRAVITY MODEL OF TRADE: A THEORETICAL PERSPECTIVE
Review of Innovation and Competitiveness, 2019 Purpose. The purpose of this study is to trace the theoretical developments of the gravity model of trade. The key question is: what are the dominant features of the development of the gravity trade model? Methodology.
Saleh Shahriar +3 more
doaj +3 more sources
Improving Resistance of Gravity Dam to Seismic Wave by Using Stepped Base [PDF]
E3S Web of Conferences, 2021 This study analyzes the possible modes of the seismic wave for concrete gravity dams and the damage occurring in the body where two gravity dam sections are taken as a case study.
Jabbar Asmaa Abdul +2 more
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Improved gravity model under policy control in regional logistics
Measurement + Control, 2021 Regional logistics has become an important direction of logistics development. The rationality of regional logistics network layout will affect the regional development. And the measurement and calculation of node gravity is an important aspect affecting
Hongchun Wang, Mengyao Li
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Remote Sensing, 2021 Shipborne gravity can be used to refine altimeter-derived gravity whose accuracy is low in shallow waters and areas with complex submarine topography. As altimeter-derived gravity only within a small radius around the shipborne data can be corrected by ...
Chengcheng Zhu +5 more
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An Accurate Gravity Disturbance Compensation Method Based on Spherical Harmonic Model and Multi-Sensor Fusion [PDF]
Hangkong bingqi, 2023 With the improvement of the accuracy requirements of high-precision long endurance inertial navigation system, the gravity disturbance has become the main error source of inertial navigation system.Is the key factor to improve the navigation accuracy ...
Liu Yuxin, Wang Xinlong, Wang Xun, Gao Wenning, Hu Xiaodong
doaj +1 more source
Analogue Models of and for Gravity [PDF]
General Relativity and Gravitation, 2002 Condensed matter systems, such as acoustics in flowing fluids, light in moving dielectrics, or quasiparticles in a moving superfluid, can be used to mimic aspects of general relativity. More precisely these systems (and others) provide experimentally accessible models of curved-space quantum field theory. As such they mimic kinematic aspects of general
Visser M, Barcelo C, Liberati, Stefano
openaire +2 more sources
Quantum gravity inspired nonlocal gravity model [PDF]
Physical Review D, 2017 We consider a nonlocal gravity model motivated by nonperturbative Quantum Gravity studies. This model, if correct, suggests the existence of strong IR relevant effects which can lead to an interesting late time cosmology. We implement the IR modification directly in the effective action.
Amendola, Luca +2 more
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Bathymetric Prediction from Multi-source Satellite Altimetry Gravity Data [PDF]
Journal of Geodesy and Geoinformation Science, 2019 According to the “theoretical admittance " and the "observation admittance" of the actual data, the theoretical value of effective elastic thickness in the study area was 10km.
Diao FAN,Shanshan LI,Shuyu MENG,Chi ZHANG,Jinkai FENG,Yan HUANG,Jiawei DU,Zhibin XING
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Artefacts in gravity field modelling [PDF]
Acta Geodynamica et Geomaterialia, 2021 Artefacts in applications of the global gravity field and topographic models based on satellite and terrestrial data of diverse kinds are studied. Various types of artefacts are presented and analysed with the aim to understand how the artefacts originated, how to reduce them (if feasible) and to avoid misinterpretations in geoscience. We work with the
Klokočník, J. (Jaroslav) +3 more
openaire +2 more sources