Academic literature on the topic 'Statistical inversions'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Statistical inversions.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Statistical inversions"

1

Nygård, Tiina, Teresa Valkonen, and Timo Vihma. "Antarctic Low-Tropospheric Humidity Inversions: 10-Yr Climatology." Journal of Climate 26, no. 14 (2013): 5205–19. http://dx.doi.org/10.1175/jcli-d-12-00446.1.

Full text
Abstract:
Abstract Humidity inversions are nearly permanently present in the coastal Antarctic atmosphere. This is shown based on an investigation of statistical characteristics of humidity inversions at 11 Antarctic coastal stations using radiosonde data from the Integrated Global Radiosonde Archive (IGRA) from 2000 to 2009. The humidity inversion occurrence was highest in winter and spring, and high atmospheric pressure and cloud-free conditions generally increased the occurrence. A typical humidity inversion was less than 200 m deep and 0.2 g kg−1 strong, and a typical humidity profile contained seve
APA, Harvard, Vancouver, ISO, and other styles
2

Cáceres, Mario, Antonio Barbadilla, and Alfredo Ruiz. "Recombination Rate Predicts Inversion Size in Diptera." Genetics 153, no. 1 (1999): 251–59. http://dx.doi.org/10.1093/genetics/153.1.251.

Full text
Abstract:
Abstract Most species of the Drosophila genus and other Diptera are polymorphic for paracentric inversions. A common observation is that successful inversions are of intermediate size. We test here the hypothesis that the selected property is the recombination length of inversions, not their physical length. If so, physical length of successful inversions should be negatively correlated with recombination rate across species. This prediction was tested by a comprehensive statistical analysis of inversion size and recombination map length in 12 Diptera species for which appropriate data are ava
APA, Harvard, Vancouver, ISO, and other styles
3

Ruiz, Alfredo, José María Ranz, Mario Cáceres, and Carmen Segarra. "Chromosomal evolution and comparative gene mapping in the Drosophila repleta species group." Brazilian Journal of Genetics 20, no. 4 (1997): 553–65. http://dx.doi.org/10.1590/s0100-84551997000400003.

Full text
Abstract:
A review of our recent work on the cromosomal evolution of the Drosophila repleta species group is presented. Most studies have focused on the buzzatii species complex, a monophyletic set of 12 species which inhabit the deserts of South America and the West Indies. A statistical analysis of the length and breakpoint distribution of the 86 paracentric inversions observed in this complex has shown that inversion length is a selected trait. Rare inversions are usually small while evolutionary successful inversions, fixed and polymorphic, are predominantly of medium size. There is also a negative
APA, Harvard, Vancouver, ISO, and other styles
4

Chapman, Ross. "Inference of geoacoustic model parameters from acoustic field data: Perspectives on Geoacoustic Inversion." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A216. http://dx.doi.org/10.1121/10.0027352.

Full text
Abstract:
Estimation of parameters of geoacoustic models from acoustic field data has been a central research theme in acoustical oceanography and ocean acoustics. During the past several decades, highly efficient numerical inversion techniques have been developed that provide model parameter estimates and their uncertainties based on statistical inference methods. However, the methods are model-based and the inversions are prone to errors related to model mismatch. In any event, the inversions can generate only effective models of the true structure of the ocean bottom, which is generally highly variab
APA, Harvard, Vancouver, ISO, and other styles
5

Prado-Alonso, Carlos. "A comprehensive corpus-based analysis of “X Auxiliary Subject” constructions in written and spoken English." Topics in Linguistics 20, no. 2 (2019): 17–32. http://dx.doi.org/10.2478/topling-2019-0007.

Full text
Abstract:
Abstract This paper describes a corpus-based analysis of subject-auxiliary inversion in both spoken and written English. The focus of the analysis is Chen’s (2013) X Auxiliary Subject construction (XASC), where X codes the fronting of a constituent which triggers the inversion of the auxiliary and the subject, as in “Never has trade union loyalty faced a more baffling test” or “What did he do?” On the basis of a statistical analysis using corpora of written and spoken English, it is argued that the distribution of XAS inversion, in the interrogative mood, is related to the degree of an address
APA, Harvard, Vancouver, ISO, and other styles
6

Devasthale, A., J. Sedlar, and M. Tjernström. "Characteristics of water-vapour inversions observed over the Arctic by Atmospheric Infrared Sounder (AIRS) and radiosondes." Atmospheric Chemistry and Physics Discussions 11, no. 5 (2011): 15801–29. http://dx.doi.org/10.5194/acpd-11-15801-2011.

Full text
Abstract:
Abstract. An accurate characterization of the vertical structure of the Arctic atmosphere is useful in climate change and attribution studies as well as for the climate modelling community to improve projections of future climate over this highly sensitive region. Here, we investigate one of the dominant features of the vertical structure of the Arctic atmosphere, i.e. water-vapour inversions, using eight years of Atmospheric Infrared Sounder data (2002–2010) and radiosounding profiles released from the two Arctic locations (North Slope of Alaska at Barrow and during SHEBA). We quantify the ch
APA, Harvard, Vancouver, ISO, and other styles
7

Devasthale, A., J. Sedlar, and M. Tjernström. "Characteristics of water-vapour inversions observed over the Arctic by Atmospheric Infrared Sounder (AIRS) and radiosondes." Atmospheric Chemistry and Physics 11, no. 18 (2011): 9813–23. http://dx.doi.org/10.5194/acp-11-9813-2011.

Full text
Abstract:
Abstract. An accurate characterization of the vertical structure of the Arctic atmosphere is useful in climate change and attribution studies as well as for the climate modelling community to improve projections of future climate over this highly sensitive region. Here, we investigate one of the dominant features of the vertical structure of the Arctic atmosphere, i.e. water-vapour inversions, using eight years of Atmospheric Infrared Sounder data (2002–2010) and radiosounding profiles released from the two Arctic locations (North Slope of Alaska at Barrow and during SHEBA). We quantify the ch
APA, Harvard, Vancouver, ISO, and other styles
8

Madrigal-Roca, Luis J., and John K. Kelly. "Are you with me? Co-occurrence tests from community ecology can identify positive and negative epistasis between inversions in Mimulus guttatus." PLOS One 20, no. 4 (2025): e0321253. https://doi.org/10.1371/journal.pone.0321253.

Full text
Abstract:
Chromosomal inversions are structural genetic variants that can play a crucial role in adaptive evolution and speciation. Patterns of attraction and repulsion among unlinked inversions — whether they tend to be carried by the same or different individuals— can indicate how selection is acting on these polymorphisms. In this study, we compare analytical techniques using data from 64 inversions that segregate among 1373 F2 plants of the yellow monkeyflower Mimulus guttatus. Mendelian assortment provides a strong null hypothesis for χ2 contingency tests. Here, we show how co-occurrence metrics us
APA, Harvard, Vancouver, ISO, and other styles
9

Arenas, Conxita, Goran Zivanovic, and Francesc Mestres. "Chromosomal Thermal Index: a comprehensive way to integrate the thermal adaptation of Drosophila subobscura whole karyotype." Genome 61, no. 2 (2018): 73–78. http://dx.doi.org/10.1139/gen-2017-0124.

Full text
Abstract:
Drosophila has demonstrated to be an excellent model to study the adaptation of organisms to global warming, with inversion chromosomal polymorphism having a key role in this adaptation. Here, we introduce a new index (Chromosomal Thermal Index or CTI) to quantify the thermal adaptation of a population according to its composition of “warm” and “cold” adapted inversions. This index is intuitive, has good statistical properties, and can be used to hypothesis on the effect of global warming on natural populations. We show the usefulness of CTI using data from European populations of D. subobscur
APA, Harvard, Vancouver, ISO, and other styles
10

Mitsuhata, Yuji, Toshihiro Uchida, and Hiroshi Amano. "2.5‐D inversion of frequency‐domain electromagnetic data generated by a grounded‐wire source." GEOPHYSICS 67, no. 6 (2002): 1753–68. http://dx.doi.org/10.1190/1.1527076.

Full text
Abstract:
Interpretation of controlled‐source electromagnetic (CSEM) data is usually based on 1‐D inversions, whereas data of direct current (dc) resistivity and magnetotelluric (MT) measurements are commonly interpreted by 2‐D inversions. We have developed an algorithm to invert frequency‐Domain vertical magnetic data generated by a grounded‐wire source for a 2‐D model of the earth—a so‐called 2.5‐D inversion. To stabilize the inversion, we adopt a smoothness constraint for the model parameters and adjust the regularization parameter objectively using a statistical criterion. A test using synthetic dat
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Statistical inversions"

1

Boucher, Eulalie. "Designing Deep-Learning models for surface and atmospheric retrievals from the IASI infrared sounder." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS145.

Full text
Abstract:
L'observation de la Terre est essentielle pour comprendre et surveiller le comportement complexe de notre planète. Les satellites, équipés d'un certain nombre de capteurs sophistiqués, constituent une plateforme clé à cet égard, offrant une opportunité d'observer la Terre à l'échelle globale et de manière continue. Les techniques d'apprentissage automatique (ML) sont utilisées depuis plusieurs décennies, dans la communauté de la télédétection, pour traiter la grande quantité de données générées quotidiennement par les systèmes d'observation de la Terre. La révolution apportée par les nouvelles
APA, Harvard, Vancouver, ISO, and other styles
2

Ladrón, de Guevara Cortés Rogelio. "Techniques For Estimating the Generative Multifactor Model of Returns in a Statistical Approach to the Arbitrage Pricing Theory. Evidence from the Mexican Stock Exchange." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/386545.

Full text
Abstract:
This dissertation focuses on the estimation of the generative multifactor model of returns on equities, under a statistical approach of the Arbitrage Pricing Theory (APT), in the context of the Mexican Stock Exchange. Therefore, this research takes as frameworks two main issues: (i) the multifactor asset pricing models, specially the statistical risk factors approach, and (ii) the dimension reduction or feature extraction techniques: Principal Component Analysis, Factor Analysis, Independent Component Analysis and Non-linear Principal Component Analysis, utilized to extract the underlying syst
APA, Harvard, Vancouver, ISO, and other styles
3

Degenhardt, Sheldon. "Weighted-inversion statistics and their symmetry groups /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487941504293867.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Fletcher, R. P. "Statistical inversion of surface parameters from ATSR-2 satellite observations." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267415.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Boberg, Jonas. "Counting Double-Descents and Double-Inversions in Permutations." Thesis, Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54431.

Full text
Abstract:
In this paper, new variations of some well-known permutation statistics are introduced and studied. Firstly, a double-descent of a permutation π is defined as a position i where πi ≥ 2πi+1. By proofs by induction and direct proofs, recursive and explicit expressions for the number of n-permutations with k double-descents are presented. Also, an expression for the total number of double-descents in all n-permutations is presented. Secondly, a double-inversion of a permutation π is defined as a pair (πi,πj) where i<j but πi ≥ 2πj. The total number of double-inversions in all n-permutations is
APA, Harvard, Vancouver, ISO, and other styles
6

Fu, Shuai. "Inversion probabiliste bayésienne en analyse d'incertitude." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00766341.

Full text
Abstract:
Ce travail de recherche propose une solution aux problèmes inverses probabilistes avec des outils de la statistique bayésienne. Le problème inverse considéré est d'estimer la distribution d'une variable aléatoire non observée X a partir d'observations bruitées Y suivant un modèle physique coûteux H. En général, de tels problèmes inverses sont rencontrés dans le traitement des incertitudes. Le cadre bayésien nous permet de prendre en compte les connaissances préalables d'experts surtout avec peu de données disponibles. Un algorithme de Metropolis-Hastings-within-Gibbs est proposé pour approcher
APA, Harvard, Vancouver, ISO, and other styles
7

Chebikin, Denis. "Polytopes, generating functions, and new statistics related to descents and inversions in permutations." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43793.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2008.<br>Includes bibliographical references (p. 75-76).<br>We study new statistics on permutations that are variations on the descent and the inversion statistics. In particular, we consider the alternating descent set of a permutation [sigma] = [sigma] 1 [sigma] 2 an defined as the set of indices i such that either i is odd and ai > ui+l, or i is even and au < au+l. We show that this statistic is equidistributed with the 3-descent set statistic on permutations [sigma] = [sigma] 1 [sigma] 2 ... [sigma] n+1 with al =
APA, Harvard, Vancouver, ISO, and other styles
8

Ars, Sébastien. "Caractérisation des émissions de méthane à l'échelle locale à l'aide d'une méthode d'inversion statistique basée sur un modèle gaussien paramétré avec les données d'un gaz traceur." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLV030/document.

Full text
Abstract:
L'augmentation des concentrations de méthane dans l'atmosphère, directement imputable aux activités anthropiques, induit une accentuation de l'effet de serre et une dégradation de la qualité de l'air. Il existe encore à l'heure actuelle de grandes incertitudes concernant les estimations des émissions des dfférentes sources de méthane à l'échellelocale. Une meilleure caractérisation de ces sources permettrait de mettre en place des politiques d'adaptation et d'att énuation efficaces afin de réduire ces émissions. Nous avons développé une nouvelle méthode de quantificationdes émissions de méthan
APA, Harvard, Vancouver, ISO, and other styles
9

Goto, Isao. "Word Reordering for Statistical Machine Translation via Modeling Structural Differences between Languages." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/189374.

Full text
Abstract:
2015-05-27に本文を差替<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(情報学)<br>甲第18481号<br>情博第532号<br>新制||情||94(附属図書館)<br>31359<br>京都大学大学院情報学研究科知能情報学専攻<br>(主査)教授 黒橋 禎夫, 教授 田中 克己, 教授 河原 達也<br>学位規則第4条第1項該当
APA, Harvard, Vancouver, ISO, and other styles
10

Konečný, Zdeněk. "Statistická analýza složených rozdělení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229488.

Full text
Abstract:
The probability distribution of a random variable created by summing a random number of the independent and identically distributed random variables is called a compound probability distribution. In this work is described a compound distribution as well as a calculation of its characteristics. Especially, the thesis is focused on studying a special case of compound distribution where each addend has the log-normal distribution and their number has the negative binomial distribution. Here are also described some approaches to estimate the parameters of LN and NB distribution. Further, the impac
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Statistical inversions"

1

Shen, Qiuyang, Jiefu Chen, Xuqing Wu, Yueqin Huang, and Zhu Han. Statistical Inversion of Electromagnetic Logging Data. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57097-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

(Argentina), Buenos Aires. Buenos Aires 2000: Plan de inversiones : inversión estratégica para reposicionar a la ciudad de Buenos Aires : por la nueva Buenos Aires. [Partido Justicialista, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ecuador. Ministerio de Bienestar Social. Plan social: Resumen de inversiones 1994. Instituto Nacional de Estadística y Censos, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bour, Juan L. Inversión en educación universitaria en Argentina. Fundación de Investigaciones Económicas Latinoamericanas, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Banco Central de Honduras. Subgerencia de Estudios Económicos., ed. Inversión extranjera directa en Honduras: Período 1993-2003. Banco Central de Honduras, Subgerencia de Estudios Económicos, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lurati, Mónica. Encuesta sobre inversión en la industria manufacturera. Fundación de Investigaciones Económicas Latinoamericanas, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Cámara de Comercio de Santiago. Departamento de Estudios Económicos. Inversión chilena detectada en el exterior: Informe 2000. Editorial Cámara de Comercio de Santiago, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Consejo Técnico de Inversiones (Argentina), ed. La transformación económica argentina: Privatizaciones, integración al MERCOSUR y boom de inversiones. Consejo Técnico de Inversiones, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Panama. Dirección de Estadística y Censo., ed. Estadística panameña, situación económica: Inversión directa extranjera, años 1990-2000. República de Panamá, Contraloría General, Dirección de Estadística y Censo, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Chile. Ministerio de Planificación y Cooperación. División de Planificación Regional. Serie regionalizada de la inversión pública efectiva 1990-2000. MIDEPLAN, División de Planificación Regional, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Statistical inversions"

1

Simon, Martin. "Statistical inversion." In Anomaly Detection in Random Heterogeneous Media. Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-10993-6_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Doicu, Adrian, Thomas Trautmann, and Franz Schreier. "Statistical inversion theory." In Numerical Regularization for Atmospheric Inverse Problems. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-05439-6_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sabbagh, Harold A., R. Kim Murphy, Elias H. Sabbagh, John C. Aldrin, and Jeremy S. Knopp. "Robust Statistical Estimators." In Computational Electromagnetics and Model-Based Inversion. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-8429-6_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Abdelrahman, E. M., and M. M. Gobashy. "A Statistical Approach to Depth Determination from Gravity Gradients." In Geophysical Data Inversion Methods and Applications. Vieweg+Teubner Verlag, 1990. http://dx.doi.org/10.1007/978-3-322-89416-8_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Fitzsimmons, Maxwell, and Herb Kunze. "Circle Inversion IFS." In Springer Proceedings in Mathematics & Statistics. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99719-3_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ng, Kai Wang. "Inversion of Bayes’ Formula for Events." In International Encyclopedia of Statistical Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-04898-2_314.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ng, Kai W. "Inversion of Bayes’ Formula for Events." In International Encyclopedia of Statistical Science. Springer Berlin Heidelberg, 2025. https://doi.org/10.1007/978-3-662-69359-9_304.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Chen, Rong, Detan Liu, Haiku Zhang, Mao Liao, Zhangxin Huang, and Liqun Xu. "A Procedure for Strength Parameters Inversion of Rock Slopes Based on Statistical Regression and Seepage-Stress Coupling: A Case Study." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_5.

Full text
Abstract:
AbstractMassive slope engineering exists in large water conservancy projects. The artificial and natural rock slopes are high and steep with diverse lithologies, and the stability and safety of high slopes are the guarantee for the overall project to be effective. This paper presents a parameter inversion procedure for rock slopes based on statistical regression models using monitoring data and coupled analysis of seepage and stress. It is applied to the intake slope of a hydropower station in Southwest China. The results show that based on the strength parameters from inversion, the relative
APA, Harvard, Vancouver, ISO, and other styles
9

Maillard, J. M. "Star-Triangle and Inversion Relations in Statistical Mechanics." In Critical Phenomena. Birkhäuser Boston, 1985. http://dx.doi.org/10.1007/978-1-4899-6650-6_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Bart, A. G., N. P. Alexeyeff, N. P. Klochkova, and N. Botchkina. "Partially Inversion of Functions for Statistical Modelling of Regulatory Systems." In Advances in Stochastic Simulation Methods. Birkhäuser Boston, 2000. http://dx.doi.org/10.1007/978-1-4612-1318-5_21.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Statistical inversions"

1

Alyousuf, Taqi, and Li Yaoguo. "Inversion Using Adaptive Physics-Based Neural Network: Application to Magnetotelluric Inversion." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22504-ea.

Full text
Abstract:
Abstract In order to develop a geophysical earth model that is consistent with the measured geophysical data, two types of inversions are commonly used: a physics-based regularized inversion and a statistical-based machine learning inversion. In nonlinear problems, deterministic regularized inversion usually necessitates a good starting model to prevent possible local minima. The neural networks inversion requires large training data sets, which makes its generalizability limited. To overcome the limitation of physics-based regularized inversion and a statistical-based machine learning inversi
APA, Harvard, Vancouver, ISO, and other styles
2

Khdhaouria, Mourad, Aldrin Rondon, Giamal Ameish, Delphine Laurencin, and Vimol Souvannavong. "Seismic Reservoir Characterization of Thin Stacked Reservoirs Based on Seismic Inversion and Probabilistic Property Estimation Methods - Cheleken Case Study." In GOTECH. SPE, 2025. https://doi.org/10.2118/224655-ms.

Full text
Abstract:
Abstract The Cheleken fields, located in southern Caspian Sea, are made of a succession of stacked sand reservoirs over a 6km time window, with significant areal and vertical variations. A seismic inversion was carried out with the aim of improving the understanding and delineation of these complex reservoirs. 3D OBN seismic data, covering the area of interest, was recently acquired. A tailored processing and velocity model building workflow was designed to produce a good quality seismic data volume and a reliable velocity model which were used as inputs for a subsequent reservoir characteriza
APA, Harvard, Vancouver, ISO, and other styles
3

Noordin, Firdaus Bin Mohamed, Ibrahim Abdelgaffar Seddik, Maniesh Singh, et al. "Mapping Injection Water Slumping and Reservoir Boundaries Using Real-Time ANN 2D Inversion of Extra Deep Azimuthal LWD Resistivity Measurements." In 2022 SPWLA 63rd Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2022. http://dx.doi.org/10.30632/spwla-2022-0024.

Full text
Abstract:
Extra deep azimuthal resistivity (EDAR) measurements are widely used for proactive geosteering and reservoir mapping. Real-time decisions are usually supported with data inversion results and uncertainty quantification based on 1D layer-cake models. A richer 2D model is required in complex scenarios, such as the irregular shaped water slumping observed in this Abu Dhabi Lower Cretaceous limestone reservoir. The inversion based on the Levenberg-Marquardt method successively runs forward simulations matching the measured and synthetic data. Inversion with a 1D layered model provides good data ma
APA, Harvard, Vancouver, ISO, and other styles
4

Mukerji, Tapan, Arild Jørstad, Gary Mavko, and John Reidar Granli. "Applying statistical rock physics and seismic inversions to map lithofacies and pore fluid probabilities in a North Sea reservoir." In SEG Technical Program Expanded Abstracts 1998. Society of Exploration Geophysicists, 1998. http://dx.doi.org/10.1190/1.1820633.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Teng, Zheng, Hui Wu, Jize Zhang, and Xin Ju. "A Generative Model of Discrete Fracture Networks Based on Latent Diffusion Model." In International Geomechanics Conference. ARMA, 2024. https://doi.org/10.56952/igs-2024-0455.

Full text
Abstract:
ABSTRACT: Discrete fractures are prevalent in shallow crust and play a crucial role in the transport of fluids, mass, and heat underground. Therefore, accurately characterizing subsurface discrete fracture networks (DFNs) is essential for a wide range of scientific and engineering applications. Such characterization often relies on the inversion of indirect observational data. However, the inherent complexity of DFNs, together with the generally limited and sparse geological/geophysical data, present significant challenges to DFN characterization. In this study, we introduce a low-dimensional
APA, Harvard, Vancouver, ISO, and other styles
6

Nguyen, Viet, Armando Vianna, Karel Steviano, Ahmad Zulharman, Ramadhana Aristya, and Hendry Lie. "Strategic Well Landing and Risk Mitigation in Heterogeneous Formation With Deterministic Automated Inversion and Remote Monitoring." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22230-ms.

Full text
Abstract:
Abstract The K-W horizontal well was drilled to produce gas reserves from A sand and oil reserves from B sand. Accurate landing of the well in the target B sand is critical for the placement of the 6 1/8" lateral section within the reservoir. The main objective of reservoir navigation in the 8 ½" build section is to detect and map the reservoir top as early as possible to smoothly place the well 10ft TVD below the top of the B sand with an inclination of 85 degrees. Several operational risks have been identified during pre-well feasibility study, including reservoir resistivity and thickness v
APA, Harvard, Vancouver, ISO, and other styles
7

Clegg, Nigel, Seth Nolan, Alban Duriez, et al. "Confidence in Subsurface Inversion Models Generated from Electromagnetic Logging While Drilling Data." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210374-ms.

Full text
Abstract:
Abstract Identifying a well's stratigraphic position from azimuthal electromagnetic (EM) data requires integrating data from multiple depths of investigation. As a well's position within the stratigraphy can be constantly changing, and formations and fluids show considerable lateral variability, this process is difficult to do manually. To simplify this, inversion algorithms are deployed to represent EM logging while drilling (LWD) measurements as models reflecting the geology. Inversion results are not a direct measurement, therefore confidence in the results is critical. Real-time well place
APA, Harvard, Vancouver, ISO, and other styles
8

Burksaitiene, Daiva, and Kristina Garskaite-Milvydiene. "Cross-Border Mergers and Acquisitions Factors in Joining the European Union Countries." In Contemporary Issues in Business, Management and Education. Vilnius Gediminas Technical University, 2017. http://dx.doi.org/10.3846/cbme.2017.076.

Full text
Abstract:
Mergers and acquisitions (M&amp;amp;As) are increasingly being used in the business world, and this process plays an important role in economic theory and lays the foundations for sustainable business development. The global recovery in foreign direct investment (FDI) was strong in 2015, with global FDI flows jumping by 38%, their highest level since the global economic and financial crisis of 2008–2009. A surge in cross-border M&amp;amp;As to $721 billion, from $432 billion in 2014, was the principal factor behind the global rebound. These M&amp;amp;As were partly driven by very large corpora
APA, Harvard, Vancouver, ISO, and other styles
9

Andreasi, F. Golfré, C. Brambilla, S. Re, F. Miotti, T. Wiik, and K. Hokstad. "Multi-Geophysics for Reservoir Characterization: A Comparison of Deterministic and Statistical Inversion Methodologies." In First EAGE Conference on Seismic Inversion. European Association of Geoscientists & Engineers, 2020. http://dx.doi.org/10.3997/2214-4609.202037041.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Rai, Jagdish, and Charles M. Bowden. "Quantum noise effects in superfluorescence from dense atomic systems." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tus7.

Full text
Abstract:
Cooperative emission from a collection of atoms prepared in an initial state of complete inversion has been studied extensively in the past. In this paper we study the cooperative emission in dense atomic systems where there is a large average number of atoms per cubic resonance wavelength. For systems with such large densities, effects of the induced dipole-dipole interaction among neighboring atoms become important. Recently it has been shown that such interatomic interaction in a dense atomic system can lead to novel nonlinear effects.1,2 The induced dipole-dipole interaction for two-level
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Statistical inversions"

1

Miller, Eric L., and Alan S. Willsky. A Multiscale, Statistically-Based Inversion Scheme for Linearized Inverse Scattering Problems. Defense Technical Information Center, 1994. http://dx.doi.org/10.21236/ada458526.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Heinrich, Carolyn, and Yeri López. Does Community Participation Produce Dividends in Social Investment Fund Projects? Inter-American Development Bank, 2007. http://dx.doi.org/10.18235/0011175.

Full text
Abstract:
Social investment funds, a widely used tool of development efforts, aim to support and strengthen local capacity for effective implementation of social and economic infrastructure projects through participatory, community-driven approaches. This working paper investigates whether these participatory methods improve the outcomes of education projects and community members' perceptions of their effectiveness using data from an impact evaluation of the third phase of the Fondo Hondureño de Inversión Social (FHIS). The study also makes an important contribution with more carefully defined and expl
APA, Harvard, Vancouver, ISO, and other styles
3

Quijada, Sebastián. Normas de la Eurostat para contabilidad de los Asociaciones Público-Privada (APP) y modelo United Kingdom Private Finance Initiative (UK PFI). Inter-American Development Bank, 2011. http://dx.doi.org/10.18235/0007598.

Full text
Abstract:
Presentación expuesta durante el Cuarto Encuentro Técnico en Materia de Estructuración de Proyectos de Asociación Público-Privada, llevado a cabo en Tuxtla Gutiérrez, Chiapas, el 16,17 y 18 de febrero de 2011. La Eurostat (Statistical Office of European Communities), creada en 1953, es la oficina de estadísticas de la Comunidad Europea que produce datos sobre la Unión Europea y promueve la armonización de los métodos estadísticos de sus estados miembros. La Eurostat ha desarrollado una serie de criterios que tiene como finalidad homologar las interpretaciones contables respecto a los activos (
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!