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Littérature scientifique sur le sujet « Gravity network »

Auteur : Grafiati

Publié le 10 mars 2023

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Articles de revues sur le sujet "Gravity network"

Prodous, Oleg A., et Dmitriy I. Shlychkov. « Forecasting continued operation of gravity drainage networks with deposits in pipe water troughs ». Journal «Izvestiya vuzov. Investitsiyi. Stroyitelstvo. Nedvizhimost» 11, n^o 4 (2021) : 646–53. http://dx.doi.org/10.21285/2227-2917-2021-4-646-653.

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In this work, the formula for forecasting the continued operation of gravity drainage networks with deposits in pipe water troughs is deduced and refined. In the authors' opinion, such a forecast should be based on the hydraulic principle for assessing the efficiency of a network operation, as the most accurate. To this end, the concept associated with the efficiency of gravity drainage networks was introduced, and a criterion for its assessment was proposed. In the study, the characteristics of hydraulic potential for concrete pipes with a diameter of 400 mm were calculated as an example. An empirical formula was proposed for determining the efficiency factor of the gravity drainage network, and its deviation range was shown. It was concluded that the expert prognosis of continued operation of gravity drainage networks should be based on the efficiency factor of the network, calculated using the obtained formula. It is recommended that a method for calculating an efficiency factor describing gravity drainage networks and special tables for the hydraulic calculation of pipes having a sediment layer of different thicknesses be elaborated. The data presented in the article allow servicing of gravity drainage network to be improved by forecasting its continued operation using the efficiency factor К_ef.

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Goodacre, A. K., J. O. Liard, P. N. Courtier, R. V. Cooper, P. J. Winter et R. K. McConnell. « Absolute gravity measurements on the canadian gravity standardization network ». Bulletin Géodésique 65, n^o 3 (septembre 1991) : 170–78. http://dx.doi.org/10.1007/bf00806346.

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Ho, Angelina M. Y., Hawa Ze Jaafar, Ionel Valeriu Grozescu et Muhammad Zaharul Asyraf Bin Zaharin. « Solar Powered Gravity-Feed Drip Irrigation System Using Wireless Sensor Network ». International Journal of Environmental Science and Development 6, n^o 12 (2015) : 970–73. http://dx.doi.org/10.7763/ijesd.2015.v6.731.

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Lagios, E. « A gravity network in central Greece for secular gravity studies ». Pure and Applied Geophysics PAGEOPH 123, n^o 1 (1985) : 81–90. http://dx.doi.org/10.1007/bf00877050.

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Colafranceschi, Eugenia, et Gerardo Adesso. « Holographic entanglement in spin network states : A focused review ». AVS Quantum Science 4, n^o 2 (juin 2022) : 025901. http://dx.doi.org/10.1116/5.0087122.

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In the long-standing quest to reconcile gravity with quantum mechanics, profound connections have been unveiled between concepts traditionally pertaining to a quantum information theory, such as entanglement, and constitutive features of gravity, like holography. Developing and promoting these connections from the conceptual to the operational level unlock access to a powerful set of tools which can be pivotal toward the formulation of a consistent theory of quantum gravity. Here, we review recent progress on the role and applications of quantum informational methods, in particular tensor networks, for quantum gravity models. We focus on spin network states dual to finite regions of space, represented as entanglement graphs in the group field theory approach to quantum gravity, and illustrate how techniques from random tensor networks can be exploited to investigate their holographic properties. In particular, spin network states can be interpreted as maps from bulk to boundary, whose holographic behavior increases with the inhomogeneity of their geometric data (up to becoming proper quantum channels). The entanglement entropy of boundary states, which are obtained by feeding such maps with suitable bulk states, is then proved to follow a bulk area law with corrections due to the entanglement of the bulk state. We further review how exceeding a certain threshold of bulk entanglement leads to the emergence of a black hole-like region, revealing intriguing perspectives for quantum cosmology.

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Ozaki, Yushi, Kazuki Kawano et Hiroshi Gotoda. « Gravitational effect on the nonlinear dynamics of a buoyant turbulent flame ». Chaos : An Interdisciplinary Journal of Nonlinear Science 32, n^o 8 (août 2022) : 083147. http://dx.doi.org/10.1063/5.0086140.

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This study numerically examines the gravitational effect on the nonlinear dynamics of a buoyant turbulent flame utilizing analytical methods based on complex networks and dynamical systems. A dense (sparse) network structure is formed in the near (far) field in low gravity, as shown by the degree and cluster coefficient in the spatial network. The global dynamics of the vertical flow velocity fluctuations in the intermittent luminous zone is synchronous with that of the temperature fluctuations in low gravity. The synchronized state disappears as the gravity level is increased, leading to a desynchronized state. These behaviors are clearly identified by the symbolic recurrence plots.

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Zahorec, Pavol, Juraj Papčo, Peter Vajda, Filippo Greco, Massimo Cantarero et Daniele Carbone. « Refined prediction of vertical gradient of gravity at Etna volcano gravity network (Italy) ». Contributions to Geophysics and Geodesy 48, n^o 4 (1 décembre 2018) : 299–317. http://dx.doi.org/10.2478/congeo-2018-0014.

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Abstract Predicted values of the vertical gradient of gravity (VGG) on benchmarks of Etna’s monitoring system, based on calculation of the topographic contribution to the theoretical free-air gradient, are compared with VGG values observed in situ. The verification campaign indicated that improvements are required when predicting the VGGs at such networks. Our work identified the following factors to be resolved: (a) accuracy of the benchmark position; (b) gravitational effect of buildings and roadside walls adjacent to benchmarks; (c) accuracy of the digital elevation model (DEM) in the proximity of benchmarks. Benchmark positions were refined using precise geodetic methods. The gravitational effects of the benchmark-adjacent walls and buildings were modeled and accounted for in the prediction. New high-resolution DEMs were produced in the innermost zone at some benchmarks based on drone-flown photogrammetry to improve the VGG prediction at those benchmarks. The three described refinements in the VGG prediction improved the match between predicted and in situ observed VGGs at the network considerably. The standard deviation of differences between the measured and predicted VGG values decreased from 36 to 13 μGal/m.

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WARD, MICHAEL D., JOHN S. AHLQUIST et ARTURAS ROZENAS. « Gravity's Rainbow : A dynamic latent space model for the world trade network ». Network Science 1, n^o 1 (avril 2013) : 95–118. http://dx.doi.org/10.1017/nws.2013.1.

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AbstractThe gravity model, long the empirical workhorse for modeling international trade, ignores network dependencies in bilateral trade data, instead assuming that dyadic trade is independent, conditional on a hierarchy of covariates over country, time, and dyad. We argue that there are theoretical as well as empirical reasons to expect network dependencies in international trade. Consequently, standard gravity models are empirically inadequate. We combine a gravity model specification with “latent space” networks to develop a dynamic mixture model for real-valued directed graphs. The model simultaneously incorporates network dependencies in both trade incidence and trade volumes. We estimate this model using bilateral trade data from 1990 to 2008. The model substantially outperforms standard accounts in terms of both in- and out-of-sample predictive heuristics. We illustrate the model's usefulness by tracking trading propensities between the USA and China.

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Wojahn, Oliver W. « Airline network structure and the gravity model ». Transportation Research Part E : Logistics and Transportation Review 37, n^o 4 (août 2001) : 267–79. http://dx.doi.org/10.1016/s1366-5545(00)00026-0.

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Maniadakis, Dimitris, et Dimitris Varoutas. « Network congestion analysis of gravity generated models ». Physica A : Statistical Mechanics and its Applications 405 (juillet 2014) : 114–27. http://dx.doi.org/10.1016/j.physa.2014.03.023.

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Thèses sur le sujet "Gravity network"

LeSage, James P., et Manfred M. Fischer. « Conventional versus network dependence panel data gravity model specifications ». WU Vienna University of Economics and Business, 2019. http://epub.wu.ac.at/6828/1/2019%2D2%2D11_v12_panel_gravity_model.pdf.

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Past focus in the panel gravity literature has been on multidimensional fixed effects specifications in an effort to accommodate heterogeneity. After introducing conventional multidimensional fixed effects, we find evidence of cross-sectional dependence in flows. We propose a simultaneous dependence gravity model that allows for network dependence in flows, along with computationally efficient Markov Chain Monte Carlo estimation methods that produce a Monte Carlo integration estimate of log-marginal likelihood useful for model comparison. Application of the model to a panel of trade flows points to network spillover effects, suggesting the presence of network dependence and biased estimates from conventional trade flow specifications. The most important sources of network dependence were found to be membership in trade organizations, historical colonial ties, common currency and spatial proximity of countries.
Series: Working Papers in Regional Science

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LeSage, James P., et Manfred M. Fischer. « MCMC estimation of panel gravity models in the presence of network dependence ». WU Vienna University of Economics and Business, 2018. http://epub.wu.ac.at/6550/1/2018%2D10%2D2_WU%2DPub__panel_gravity_model.pdf.

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Past focus in the panel gravity literature has been on multidimensional fixed effects specifications in an effort to accommodate heterogeneity. After introducing fixed effects for each origin- destination dyad and time-period speciffic effects, we find evidence of cross-sectional dependence in flows. We propose a simultaneous dependence gravity model that allows for network dependence in flows, along with computationally efficient MCMC estimation methods that produce a Monte Carlo integration estimate of log-marginal likelihood useful for model comparison. Application of the model to a panel of trade flows points to network spillover effects, suggesting the presence of network dependence and biased estimates from conventional trade flow specifications.
Series: Working Papers in Regional Science

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Stockwell, Robert G. « S-transform analysis of gravity wave activity from a small scale network of airglow imagers ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0016/NQ42554.pdf.

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Jayasooriya, Arachchilage Dinush Lanka Panditharathna. « Spin Network Evaluation and the Asymptotic Behavior ». OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1825.

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AN ABSTRACT OF THE DISSERTATION OFDinush Lanka Panditharathna Jayasooriya Arachchilage, forthe Doctor of Philosophy degree in MATHEMATICS, presented on June 22, 2020 at SouthernIllinois University Carbondale.TITLE: SPIN NETWORK EVALUATION AND THE ASYMPTOTIC BEHAVIORMAJOR PROFESSOR: Dr. Jerzy KocikGraphically, a spin network is a trivalent graph with weights on each edge. At anyof the vertices, the sum of all three weights is even and the sum of any two weights isgreater than or equal to the remaining weight. If the spin network has no free ends, thenwe can evaluate the spin network. Here, we propose a method to evaluate some basic spinnetworks using the idea of Stirling triangle.Tangent circles with integer curvatures are a natural source to make a spin network.In particular, there are spin networks corresponding the Apollonian circle packing and theFord circle packing. We obtain the recurrence relations using the Descartes circle theoremand we evaluate the Apollonian spin network and the Ford circle spin network. We alsodiscuss the asymptotic behavior of the Ford circle spin network.

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Muvingi, Onai. « Restructuring air transport to meet the needs of the Southern African development community ». Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7915.

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An efficient air transport system is an important part of social and economic development of Southern African Development Community (SADC). Efficient intra-SADC air service connections enhance regional integration, access to the global economy, international tourism and contribute towards the vision to establish the African Economic Community by 2034. SADC, in July 1998, embarked on liberalisation of the regional civil aviation sector in order to enhance the efficiency of air transport services. In the United States of America and European Union, the liberalisation of air transport has transformed civil aviation networks. The fragmentation of air service connections on the intra-SADC network in the midst of the liberalisation process is symptomatic of a poor implementation strategy coupled with air transport market imperfections. The purpose of this thesis is to examine, understand and explain the factors that influence the disintegration of the intra-SADC air transport network .The aim is to identify how regional air transport services can be transformed to meet the social and economic demands of the region. This research adopts network theory, as the conceptual framework of the investigation. Assuming a graph approaching maximal connection as the sought after state of affairs for SADC; this study benchmarked the post liberalisation network structure to the regional economic communities of ASEAN and MERCOSUR. The aim of the benchmarking is to identify the extend of the differences in air transport network in those two regions, resulting from the policies adopted and to establish how the SADC policies may be improved and implemented more efficiently. The findings of the study are that, in comparison to the two developing regions, SADC’s liberalisation measures have failed. The study developed and evaluated an econometric model which analysed demand patterns on the intra-SADC passenger air transport network. Although low levels of passenger demand seem to characterise the majority of SADC city-pairs, the study identified nodes with sufficient demand to justify direct connections which would in turn reduce network fragmentation. This research also establishes that the absence of a realistic detailed roadmap, an ill-defined programme of action and inadequate resources contributed to the failure of SADC’s liberalisation strategy. In its final sections, this study proposes an ideal demand-driven network configuration and offers specific recommendations to SADC member states for that network to be functional. The proposed network improves network connectivity from the current poor levels, where a connectivity measure of 15% suggests underdevelopment, to levels over 40%. The study however, acknowledges that air transport liberalisation does not necessarily guarantee equitable distribution of network efficiency in developing regions. There are communities that cannot sustain commercially viable air service connections without economic subvention, probably in the form of the Public Service Obligation (PSO) programme adopted in the EU.

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Collet, François. « Short scale study of 4-simplex assembly with curvature, in euclidean Loop Quantum Gravity ». Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4076/document.

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Une étude d'un assemblage symétrique de trois 4-simplex en géométrie classique, de Regge et quantique. Nous étudions les propriétés géométriques et surtout la présence de courbure. Nous montrons que les géométries classique et de Regge de l'assemblage ont une courbure qui évolue en fonction de ses paramètres de bordure. Pour la géométrie quantique, une version euclidienne du modèle EPRL est utilisé avec une valeur pratique du paramètre Barbero-Immirzi pour définir l'amplitude de transition de l'ensemble et de ses composants. Un code C ++ est conçu pour calculer les amplitudes et étudier numériquement la géométrie quantique. Nous montrons qu'une géométrie classique, avec une courbure, émerge déjà à bas spin. Nous reconnaissons également l'apparition de configurations dégénérées et de leurs effets sur la géométrie attendue
A study of symmetrical assembly of three euclidean 4-simplices in classical, Regge and quantum geometry. We study the geometric properties and especially the presence of curvature. We show that classical and Regge geometry of the assembly have curvature which evolves in function of its boundary parameters. For the quantum geometry, a euclidean version of EPRL model is used with a convenient value of the Barbero-Immirzi parameter to define the transition amplitude of the assembly and its components. A C++ code is design for compute the amplitudes and study numerically the quantum geometry. We show that a classical geometry, with curvature, emerges already at low spin. We also recognize the appearance of the degenerate configurations and their effects on the expected geometry

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Basu, Proma. « Proteomic Analysis of Arabidopsis Seedlings Germinated in Microgravity to Identify Candidate Genes for Gravity Signal Transduction ». Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1565216423464876.

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Mebratu, Ashagrie Kefyalew. « Does religious similarity influence the direction of trade ? : Evidence from US bilateral trade with other 168 countries ». Thesis, Södertörns högskola, Institutionen för samhällsvetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-17478.

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Despite interest in the influence of religion on economic activity by early economists like Adam Smith, modern economists have done little research on the subject. In light of the apparent religious fervour in many parts of the global economy, economists' seeming lack of interest in studying how religious cultures enhance or retard the globalization of economic activity is especially surprising. In general, trade theories have given less weight towards the reason for trade explanation on demand side. As a contrary to H-O theory Linder had proposed a theoretically sound and empirically consistent trade theory with a new claim for the reasons why countries trade on the demand side. To fill this gap, I use international survey data on religiosity for a broad panel of countries trading with US to investigate the effects of church attendance and religious beliefs on trade. The beliefs are, in turn, the principal output of the religion sector, and the believer alignment to a specific denomination measures the inputs to this sector. Hence, I used an extended gravity model of international trade to control for a variety of factors that determine trade, and I used two regression methods, OLS and WLS, to exploit the model to its fullest. I find that the sharing of same religious cultures by people in different countries has a significantly positive influence on bilateral trade, all other things being equal. These results accord with a perspective in which religious beliefs influence individual traits that enhance trade and economic performance in general. And my attempt to magnify religion as a means to trade is only a derivation of Linder’s overlapping demand theory.

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Karabanov, Oleksandr G. « Seasonal and spatial structure of the gravity waves and vertical winds over the central USA derived from the NOAA Profiler Network data ». Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-06262006-145120/.

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Thesis (Ph. D.)--Earth and Atmospheric Sciences, Georgia Institute of Technology, 2007.
Dr. Paul Steffes, Committee Member ; Dr. Irina Sokolik, Committee Member ; Dr. Robert Black, Committee Member ; Dr. Robert G. Roper, Committee Chair ; Dr. Derek Cunnold, Committee Member.

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Purpurovič, Janina. « Antrosios klasės gravimetrinių matavimų analizė ». Master's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120723_102357-23012.

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Baigiamajame magistro darbe atlikta Lietuvos ir Lenkijos gravimetrinių tinklų analizė. Apžvelgta IGSN 71 sunkio sistemos perdavimo metodika, išnagrinėtas gravimetrinių tinklų tikslumas. Pateikta informacija apie naujausią automatinį gravimetrą Scintrex CG-5, atlikta Lietuvos antrosios klasės gravimetrinio tinklo sudarymo metodikos detali analizė. Sudaryta gravimetrinių matavimų duomenų bazė, kuri gali būti naudojama gravimetrinių matavimų duomenų analizei. Panaudojant antrosios klasės gravimetrinio tinklo matavimų gravimetrais Scintrex CG-5 duomenis, atlikti, sunkio pagreičio tikslumo priklausomybės nuo matavimų skaičiaus punkte, tyrimai. Darbe gauti tyrimų rezultatai gali būti panaudoti tobulinant matavimų gravimetrais Scintrex CG -5 metodiką. Darbą sudaro 6 dalys: įvadas, 4 skyriai, išvados, literatūros sąrašas. Darbo apimtis – 98 p. , 56 iliustr., 22 lent., 28 bibliografiniai šaltiniai.
Thesis carried out in Lithuania and Poland, the gravimetric analysis of the network.Reviewed in IGSN 71gravity system of transmission methods, examined the accuracy of gravimetric networks. The information on the latest automatic gravimeter Scintrex CG-5, made second-class Lithuanian gravimetric network of methodology on a detailed analysis. Done gravimetric measurement database that can be used for gravimetric measurement data analysis. Using a second-class gravimeters gravimetric network Scintrex CG-5 data, perform, acceleration of gravity accuracy dependence on the number of measurements point out. We obtain the results can be used to improve measurement gravimeters Scintrex CG -5 methodology. The work consists of six parts: introduction, four sections, conclusions and the list of literature. Working volume - 98 pages, 56 drawings, 25 tables. The list of literature includes 28 bibliographical sources.

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Livres sur le sujet "Gravity network"

Andersen, Ole Bedsted. Danish precision gravity reference network. København : Kort & matrikelstyrelsen, 1996.

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Moose, Robert E. The National Geodetic Survey Gravity Network. Rockville, MD : U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Charting and Geodetic Services, 1987.

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Geological Survey (U.S.), dir. Gravity base station network and descriptions for the Greenville 1p0s : Y 2p0s. [Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey, 1986.

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Boedecker, Gerd. International absolute gravity basestation network : Status report March 1986. München : Verlag der Bayerischen Akademie der Wissenschaften in Kommission bei der C.H. Beck'schen Verlagsbuchhandlung, 1986.

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Wynn, Jeffrey C. Gravity base station network and descriptions for the Greenville 1?□by 2?□quadrangle, Georgia and South Carolina. [Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey, 1986.

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Jones, Gerard F. Gravity-Driven Water Flow in Networks. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470939659.

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Jones, Gerard F. Gravity-driven water flow in networks : Theory and design. Hoboken, N.J : Wiley, 2010.

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Parker, Philip M., et James N. Parker. Myasthenia gravis : A medical dictionary, bibliography and annotated research guide to Internet references. San Diego, CA : ICON Health Publications, 2004.

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Modified Gravity and Cosmology : An Update by the CANTATA Network. Springer International Publishing AG, 2022.

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Capozziello, Salvatore, Paulo Vargas Moniz, Emmanuel N. Saridakis, Ruth Lazkoz et Vincenzo Salzano. Modified Gravity and Cosmology : An Update by the CANTATA Network. Springer International Publishing AG, 2021.

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Chapitres de livres sur le sujet "Gravity network"

Charles, K., et R. G. Hipkin. « British Precise Gravity Network 1993 ». Dans International Association of Geodesy Symposia, 39–45. Berlin, Heidelberg : Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79721-7_5.

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Sen, Ashish, et Tony E. Smith. « Gravity Models : An Overview ». Dans Advances in Spatial and Network Economics, 49–152. Berlin, Heidelberg : Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79880-1_3.

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Sen, Ashish, et Tony E. Smith. « Gravity Models : Formal Development ». Dans Advances in Spatial and Network Economics, 221–353. Berlin, Heidelberg : Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-79880-1_5.

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Oja, Tõnis. « Gravity System and Network in Estonia ». Dans Geodesy for Planet Earth, 315–22. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20338-1_38.

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Kenyeres, A., M. Sacher, J. Ihde, H. Denker et U. Marti. « EUVN_DA : Realization of the European Continental GPS/leveling Network ». Dans Gravity, Geoid and Earth Observation, 315–20. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10634-7_41.

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Jiang, Z., E. F. Arias, L. Tisserand, K. U. Kessler-Schulz, H. R. Schulz, V. Palinkas, C. Rothleitner, O. Francis et M. Becker. « Updating the Precise Gravity Network at the BIPM ». Dans Geodesy for Planet Earth, 263–71. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20338-1_32.

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Crossley, D., et J. Hinderer. « GGP (Global Geodynamics Project) : An International Network of Superconducting Gravimeters to Study Time-Variable Gravity ». Dans Gravity, Geoid and Earth Observation, 627–35. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10634-7_83.

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Schön, S., H. Kutterer, M. Mayer et B. Heck. « A Study on the Transfer of the ITRF Datum to a GPS Network in Antarctica ». Dans Gravity, Geoid and Geodynamics 2000, 29–34. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04827-6_5.

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Boedecker, Gerd. « The International Absolute Gravity Basestation Network (IAGBN) : Status 1992 ». Dans Geodesy and Physics of the Earth, 61–62. Berlin, Heidelberg : Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78149-0_16.

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Gupta, Vijay K., Ed Waymire et Ignacio Rodríguez-Iturbe. « On Scales, Gravity and Network Structure in Basin Runoff ». Dans Scale Problems in Hydrology, 159–84. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4678-1_8.

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Actes de conférences sur le sujet "Gravity network"

Griego, Jorge. « Spin network quantum gravity ». Dans The second meeting on trends in theoretical physics. AIP, 1999. http://dx.doi.org/10.1063/1.59664.

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Odalovic, O., et M. Starcevic. « Gravity Network Of Serbia -History And New Measurements ». Dans 4th Congress of the Balkan Geophysical Society. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.26.p10-01.

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Herrera, Carianna, Javier Sánchez-Rojas et Milagrosa Aldana. « Fractal characterization of northwestern Venezuela gravity station network ». Dans SEG Technical Program Expanded Abstracts 2018. Society of Exploration Geophysicists, 2018. http://dx.doi.org/10.1190/segam2018-2996592.1.

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Cappart, Quentin, et Adrien Thonet. « The world migration network : Rankings, groups and gravity models ». Dans IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON). IEEE, 2015. http://dx.doi.org/10.1109/eurocon.2015.7313799.

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Taylor, C. L., et D. W. Vasco. « Inversion of gravity gradiometry data using a neural network ». Dans SEG Technical Program Expanded Abstracts 1990. Society of Exploration Geophysicists, 1990. http://dx.doi.org/10.1190/1.1890273.

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FitzGerald, Desmond, Mohammed Hichem Bencharef, Riordan Byrne et Simge Ayfer. « 3D fault network derived from gravity : Australia and Algeria ». Dans First International Meeting for Applied Geoscience & Energy. Society of Exploration Geophysicists, 2021. http://dx.doi.org/10.1190/segam2021-3594753.1.

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Cintia, Paolo, Roberto Trasarti, Jose Antonio De Macedo, Livia Almada et Camila Fereira. « A Gravity Model for Speed Estimation over Road Network ». Dans 2013 14th IEEE International Conference on Mobile Data Management (MDM). IEEE, 2013. http://dx.doi.org/10.1109/mdm.2013.83.

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Humberto Subiza Piña, Walter, et Mauro Andrade de Sousa. « The Gravity Database Of The Observatório Nacional And The Current Status Of The Brazilian Fundamental Gravity Network ». Dans 7th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.217.327.

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Jiang, Xue, et Tianyu Zhao. « Whole-region Tourism Greenway Network Organization Mechanism Based on Gravity Model Flow Measurement ». Dans 55th ISOCARP World Planning Congress, Beyond Metropolis, Jakarta-Bogor, Indonesia. ISOCARP, 2019. http://dx.doi.org/10.47472/mjvo9285.

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The structure and organization of greenway network is the core stone of greenway planning. Generally, the relevant between point elements and line elements in the network is taken as the focus of quantitative structure evaluation. In this study, the evaluation and organization method of greenway network is based on gravity model flow measurement. Ningan city is taken as an example because of its rich tourism resources and ecological resources. The cost distance formula has been improved in the process. Network flow is allocated to each path in the gravitational model to enhance the scientific evaluation. Firstly, the existing greenway network structure is sorted out and summarized. Minimum cost path method is used to form potential greenway network structure. This structure is divided into two parts, one is based on comprehensive elements and the other is based on general elements. The existing structure and potential structure are combined to form a preliminary abstract network structure. Gravity model is used to measure and classify the traffic among abstract network nodes. Two kinds of greenway network structures are compared and analyzed. On this basis, the greenway network is optimized and verified through field research. It provides a basis for the further planning and implementation of the actual greenway network in small towns

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Qiao, Yu, et Hao Ji. « Trajectory Differential Privacy Protection with Regional Center of Gravity ». Dans 2022 International Conference on Computer Network, Electronic and Automation (ICCNEA). IEEE, 2022. http://dx.doi.org/10.1109/iccnea57056.2022.00025.

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Rapports d'organisations sur le sujet "Gravity network"

Nakamura, Aki, Sarah Buckerfield et Peter Wynne. Australian Fundamental Gravity Network Absolute Gravity Survey 2015 : Gravity Survey ID : 201590. Geoscience Australia, 2016. http://dx.doi.org/10.11636/record.2016.033.

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Nakamura, A. Australian Fundamental Gravity Network Absolute Gravity Survey 2016 : Gravity Survey ID : 201691. Geoscience Australia, 2017. http://dx.doi.org/10.11636/record.2017.015.

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Harris, R. N., et D. A. Ponce. High-precision gravity network to monitor temporal variations in gravity across Yucca Mountain, Nevada. Office of Scientific and Technical Information (OSTI), décembre 1988. http://dx.doi.org/10.2172/60645.

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Payne, Allan D. The Impact of Computer Network Attacks on Infrastructure Centers of Gravity. Fort Belvoir, VA : Defense Technical Information Center, avril 1999. http://dx.doi.org/10.21236/ada364072.

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Liard, J., et A. Lambert. Analysis of Charlevoix precise gravity data from 1976 to 1984 : details of a precise gravity network adjustment procedure. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/315303.

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Lorente, Miguel. Spin Networks in Quantum Gravity. Journal of Geometry and Symmetry in Physics, 2012. http://dx.doi.org/10.7546/jgsp-6-2006-85-100.

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Xie, Rongfang, Liting Liu, Ruiqi Wang et Chunhua Huang. Traditional Chinese medicine for Myasthenia gravis : study protocol for a network meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, juin 2020. http://dx.doi.org/10.37766/inplasy2020.6.0049.

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Warrick, Arthur W., Gideon Oron, Mary M. Poulton, Rony Wallach et Alex Furman. Multi-Dimensional Infiltration and Distribution of Water of Different Qualities and Solutes Related Through Artificial Neural Networks. United States Department of Agriculture, janvier 2009. http://dx.doi.org/10.32747/2009.7695865.bard.

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The project exploits the use of Artificial Neural Networks (ANN) to describe infiltration, water, and solute distribution in the soil during irrigation. It provides a method of simulating water and solute movement in the subsurface which, in principle, is different and has some advantages over the more common approach of numerical modeling of flow and transport equations. The five objectives were (i) Numerically develop a database for the prediction of water and solute distribution for irrigation; (ii) Develop predictive models using ANN; (iii) Develop an experimental (laboratory) database of water distribution with time; within a transparent flow cell by high resolution CCD video camera; (iv) Conduct field studies to provide basic data for developing and testing the ANN; and (v) Investigate the inclusion of water quality [salinity and organic matter (OM)] in an ANN model used for predicting infiltration and subsurface water distribution. A major accomplishment was the successful use of Moment Analysis (MA) to characterize “plumes of water” applied by various types of irrigation (including drip and gravity sources). The general idea is to describe the subsurface water patterns statistically in terms of only a few (often 3) parameters which can then be predicted by the ANN. It was shown that ellipses (in two dimensions) or ellipsoids (in three dimensions) can be depicted about the center of the plume. Any fraction of water added can be related to a ‘‘probability’’ curve relating the size of the ellipse (or ellipsoid) that contains that amount of water. The initial test of an ANN to predict the moments (and hence the water plume) was with numerically generated data for infiltration from surface and subsurface drip line and point sources in three contrasting soils. The underlying dataset consisted of 1,684,500 vectors (5 soils×5 discharge rates×3 initial conditions×1,123 nodes×20 print times) where each vector had eleven elements consisting of initial water content, hydraulic properties of the soil, flow rate, time and space coordinates. The output is an estimate of subsurface water distribution for essentially any soil property, initial condition or flow rate from a drip source. Following the formal development of the ANN, we have prepared a “user-friendly” version in a spreadsheet environment (in “Excel”). The input data are selected from appropriate values and the output is instantaneous resulting in a picture of the resulting water plume. The MA has also proven valuable, on its own merit, in the description of the flow in soil under laboratory conditions for both wettable and repellant soils. This includes non-Darcian flow examples and redistribution and well as infiltration. Field experiments were conducted in different agricultural fields and various water qualities in Israel. The obtained results will be the basis for the further ANN models development. Regions of high repellence were identified primarily under the canopy of various orchard crops, including citrus and persimmons. Also, increasing OM in the applied water lead to greater repellency. Major scientific implications are that the ANN offers an alternative to conventional flow and transport modeling and that MA is a powerful technique for describing the subsurface water distributions for normal (wettable) and repellant soil. Implications of the field measurements point to the special role of OM in affecting wettability, both from the irrigation water and from soil accumulation below canopies. Implications for agriculture are that a modified approach for drip system design should be adopted for open area crops and orchards, and taking into account the OM components both in the soil and in the applied waters.

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