Bibliografias temáticas / Signature inversion

Índice

Artigos de revistas
Teses / dissertações
Capítulos de livros
Trabalhos de conferências

Literatura científica selecionada sobre o tema "Signature inversion"

Autor: Grafiati

Publicado: 21 de dezembro de 2024

Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos

Selecione um tipo de fonte:

Consulte a lista de atuais artigos, livros, teses, anais de congressos e outras fontes científicas relevantes para o tema "Signature inversion".

Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.

Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.

Artigos de revistas sobre o assunto "Signature inversion"

Van Den Broeke, Matthew S. "Bioscatter Characteristics Related to Inversion Variability in Atlantic Basin Tropical Cyclones". Earth Interactions 26, n.º 1 (janeiro de 2022): 28–38. http://dx.doi.org/10.1175/ei-d-21-0010.1.

Texto completo da fonte

Resumo:

Abstract Tropical cyclones (TCs) routinely transport organisms at their centers of circulation. The TC center of circulation is also often marked by an inversion, and the height of the inversion base may change as the TC intensifies or weakens. In this study, a dataset of 49 dropsonde-measured inversions in 20 separate Atlantic Ocean TCs is compared with spatiotemporally collocated polarimetric radar measurements of bioscatter. Bioscatter signature maximum altitude is found to be a function of temperature lapse rate across the inversion base (r = 0.473), and higher inversion bases were generally associated with denser bioscatter signatures, especially when strong hurricanes (minimum pressure < 950 hPa) were considered (r = 0.601). Characteristics of the bioscatter signature had some skill in predicting TC inversion characteristics (adjusted r2 of 16%–40%), although predictability was increased when TC intensity was also included as a predictor (adjusted r2 of 40%–59%). These results indicate promise for using the bioscatter signature to monitor the TC inversion and represent an example of a situation in which the behavior of organisms in the airspace may be indicative of ongoing atmospheric processes. Significance Statement Tropical cyclone centers of circulation are often associated with an inversion, the base of which changes altitude with system strengthening and weakening. They may also contain a radar-observable bioscatter signature. In this study, we wanted to determine how the bioscatter signature relates to inversion characteristics for the benefit of meteorologists and biologists. Bioscatter signature characteristics were related to strength of the temperature and dewpoint lapse rates across the inversion base, and deeper/denser bioscatter signatures were typically associated with higher inversion bases. The findings suggest that trends in tropical cyclone inversion characteristics could be remotely monitored via the bioscatter signature. They also support prior speculation that some birds may seek the relatively laminar flow above an inversion base.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Zhang, Jian Hong, Hua Chen e Yi Xian Yang. "Efficient Blind Signature Scheme Based on Modified Generalized Bilinear Inversion". Key Engineering Materials 439-440 (junho de 2010): 1265–70. http://dx.doi.org/10.4028/www.scientific.net/kem.439-440.1265.

Texto completo da fonte

Resumo:

As a special anonymous signature, the blindness of blind signatures makes it play an important role in electronic commerce. In this paper we first propose a novel blind signature scheme from bilinear pairings. Furthermore, we also give a formal proof of security for the proposed schemes in the random oracle model. And we show that the scheme satisfies the two properties of blind signature: blindness and unforgeability. As for efficiency of the scheme, the size of our blind signature is 320 bits, and no pairings operator are required in the blind signing phas and two pairing operators are needed I the verification phase.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Vallée, Marc A., William A. Morris, Stéphane Perrouty, Robert G. Lee, Ken Wasyliuk, Julia J. King, Kevin Ansdell et al. "Geophysical inversion contributions to mineral exploration: lessons from the Footprints project". Canadian Journal of Earth Sciences 56, n.º 5 (maio de 2019): 525–43. http://dx.doi.org/10.1139/cjes-2019-0009.

Texto completo da fonte

Resumo:

Magnetic and gravity inversions are used to create 2D or 3D models of the magnetic susceptibility and density, respectively, using potential field data. Unconstrained inversions generate an output based on mathematical constraints imposed by the inversion algorithm. Constrained inversions integrate lithological, structural, and petrophysical information in the inversion process to produce more geologically meaningful results. This study analyses the validity of this assertion in the context of the NSERC-CMIC Mineral Exploration Footprints project. Unconstrained and constrained geophysical inversions were computed for three mining sites: a gold site (Canadian Malartic, Québec), a copper site (Highland Valley, British Columbia), and a uranium site (Millennium – McArthur River, Saskatchewan). After initially computing unconstrained inversions, constrained inversions were developed using physical property measurements, which directly link geophysics to geology, and lithological boundaries extracted from an interpreted geological model. While each derived geological model is consistent with the geophysical data, each site exhibited some magnetic complexity that confounded the inversion. The gold site includes regions with a strong magnetic signature that masks the more weakly magnetic zone, thereby hiding the magnetic signature associated with the ore body. Initial unconstrained inversions for the copper site yielded solutions with invalid depth extent. A consistency between the constrained model and the geological model is reached with iterative changes to the depth extent of the model. At the uranium site, the observed magnetic signal is weak, but the inversion provided some insights that could be interpreted in terms of an already known complexly folded geological model.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Zhang, Jian Hong, Min Xu e Xiu Na Su. "An Efficient and Provably Secure Proxy Signature Scheme". Advanced Materials Research 211-212 (fevereiro de 2011): 876–80. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.876.

Texto completo da fonte

Resumo:

As a concept of delegating signing rights for digital signatures, proxy signature is a well studied subject in cryptography. Proxy signature is an important delegation technique. It plays an important role in auto-office system. In this paper, we give a secure and efficient proxy signature scheme. The security of the scheme is base on the fixed inversion problem of bilinear map. It has the following advantages: simple construction, short size and low computation.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Landrø, M., e R. Sollie. "Source signature determination by inversion". GEOPHYSICS 57, n.º 12 (dezembro de 1992): 1633–40. http://dx.doi.org/10.1190/1.1443230.

Texto completo da fonte

Resumo:

A new method for estimating the pressure wavefield generated by a marine air‐gun array is presented. It is assumed that data is acquired at a ministreamer located below the source array. Effective source signatures for each air gun are estimated by an inversion algorithm. The forward modeling scheme used in the inversion algorithm is based upon a physical modeling of the air bubble generated by each air gun. This means that typical inversion parameters are: gun depths, empirical damping coefficients, and reflection coefficient of the sea surface. Variations in streamer depth are also taken into account by the inversion scheme. The algorithm has been successfully tested on examples with unknown streamer positions, gun parameters, reflection coefficient of sea surface, and ministreamer data contaminated with white noise.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Onishi, N., e N. Tajima. "An Interpretation of Signature Inversion". Progress of Theoretical Physics 80, n.º 1 (1 de julho de 1988): 130–37. http://dx.doi.org/10.1143/ptp.80.130.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Zhou, S.-G., Y.-Z. Liu, Y.-J. Ma e C.-X. Yang. "Low-spin signature inversion in". Journal of Physics G: Nuclear and Particle Physics 22, n.º 3 (1 de março de 1996): 415–20. http://dx.doi.org/10.1088/0954-3899/22/3/014.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Xu, F. R., W. Satuła e R. Wyss. "Quadrupole pairing interaction and signature inversion". Nuclear Physics A 669, n.º 1-2 (abril de 2000): 119–34. http://dx.doi.org/10.1016/s0375-9474(99)00817-9.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Lyons, Terry J., e Weijun Xu. "Hyperbolic development and inversion of signature". Journal of Functional Analysis 272, n.º 7 (abril de 2017): 2933–55. http://dx.doi.org/10.1016/j.jfa.2016.12.024.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Aghamiry, H. S., F. W. Mamfoumbi-Ozoumet, A. Gholami e S. Operto. "Efficient extended-search space full-waveform inversion with unknown source signatures". Geophysical Journal International 227, n.º 1 (22 de maio de 2021): 257–74. http://dx.doi.org/10.1093/gji/ggab202.

Texto completo da fonte

Resumo:

SUMMARY Full waveform inversion (FWI) requires an accurate estimation of source signatures. Due to the coupling between the source signatures and the subsurface model, small errors in the former can translate into large errors in the latter. When direct methods are used to solve the forward problem, classical frequency-domain FWI efficiently processes multiple sources for source signature and wavefield estimations once a single lower–upper (LU) decomposition of the wave-equation operator has been performed. However, this efficient FWI formulation is based on the exact solution of the wave equation and hence is highly sensitive to the inaccuracy of the velocity model due to the cycle skipping pathology. Recent extended-space FWI variants tackle this sensitivity issue through a relaxation of the wave equation combined with data assimilation, allowing the wavefields to closely match the data from the first inversion iteration. Then, the subsurface parameters are updated by minimizing the wave-equation violations. When the wavefields and the source signatures are jointly estimated with this approach, the extended wave equation operator becomes source dependent, hence making direct methods and, to a lesser extent, block iterative methods ineffective. In this paper, we propose a simple method to bypass this issue and estimate source signatures efficiently during extended FWI. The proposed method replaces each source with a blended source during each data-assimilated wavefield reconstruction to make the extended wave equation operator source independent. Besides computational efficiency, the additional degrees of freedom introduced by spatially distributing the sources allows for a better signature estimation at the physical location when the velocity model is rough. We implement the source signature estimation with a variable projection method in the recently proposed iteratively refined wavefield reconstruction inversion (IR-WRI) method. Numerical tests on the Marmousi II and 2004 BP salt synthetic models confirm the efficiency and the robustness against velocity model errors of the new method compared to the case where source signatures are known.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Mais fontes

Teses / dissertações sobre o assunto "Signature inversion"

Xu, Weijun. "Inverting the signature of a path". Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:954ff1e3-9162-456a-91a3-39734854cde2.

Texto completo da fonte

Resumo:

This thesis consists of two parts. The first part (Chapters 2-4) focuses on the problem of inverting the signature of a path of bounded variation, and we present three results here. First, we give an explicit inversion formula for any axis path in terms of its signature. Second, we show that for relatively smooth paths, the derivative at the end point can be approximated arbitrarily closely by its signature sequence, and we provide explicit error estimates. As an application, we give an effective inversion procedure for piecewise linear paths. Finally, we prove a uniform estimate for the signatures of paths of bounded variations, and obtain a reconstruction theorem via that uniform estimate. Although this general reconstruction theorem is not computationally efficient, the techniques involved in deriving the uniform estimate are useful in other situations, and we also give an application in the case of expected signatures for Brownian motion. The second part (Chapter 5) deals with rough paths. After introducing proper backgrounds, we extend the uniform estimate above to the context of rough paths, and show how it can lead to simple proofs of distance bounds for Gaussian iterated integrals.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Jodidar, Praveen Muralidhar. "Study of collectivity in neutron-deficient A≈120 nuclei close to the proton drip line". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP124.

Texto completo da fonte

Resumo:

Cette thèse présente des études spectroscopiques de noyaux très déficients en neutrons dans la région de masse A ≈ 120. Nous avons effectué la réaction de fusion-évaporation ⁶⁴Zn + ⁵⁸Ni et utilisé l'installation Jurogam 3 + MARA située au laboratoire JYFL en Finlande. Plus de 15 noyaux ont été produits dans cette réaction. Notre étude s'est principalement concentrée sur trois isotopes : ¹²⁰La, ¹¹⁷Cs, et ¹¹⁴I. Nous avons identifié pour la première fois des états excités dans ¹²⁰La, ce qui en fait l'isotope de lanthane le plus léger connu par spectroscopie. Les états observés sont organisés en une cascade construite sur l'état fondamental et une bande rotationnelle construite sur la configuration πh_11/2 ⊗ νh_11/2. Des calculs de Nilsson Strutinsky ont été effectués pour estimer les paramètres de déformation, et un modèle de rotor triaxial plus deux quasiparticules a été utilisé pour décrire l'inversion de signature et les probabilités de transition B(M1)/B(E2). Dans le noyau ¹¹⁷Cs, nous avons trouvé trois nouvelles bandes, établi l'état fondamental et les énergies d'excitation des bandes 1 et 2. Grâce aux spectres de masse obtenus au plan focal du séparateur MARA et aux rayons X observés par le détecteur Jurogam 3, nous avons fermement attribué toutes les bandes observées à ¹¹⁷Cs. Des calculs de modèle en couches avec conservation du nombre de particules ont été effectués pour vérifier les configurations attribuées à toutes les bandes. Les calculs suggèrent que ¹¹⁷Cs est un noyau déformé avec ε₂ ≈ 0.32. Nous avons également étudié la structure des niveaux de ¹¹⁴I. Dans ce noyau, nous avons trouvé plusieurs états à basse énergie d'excitation caractérisés par une faible déformation, et trois bandes de rotation à une énergie plus élevée, basées sur une déformation plus importante. Nous avons établi l'énergie d'excitation de toutes les bandes et ainsi identifié l'état fondamental. Trois nouveaux isomères ont été identifiés sur la base du déséquilibre des intensités. Les calculs de modèle en couches suggèrent une coexistence de formes prolate-oblate dans ¹¹⁴I. Dans tout ce travail, les spins et parités des états ont été attribués sur la base de mesures de corrélations angulaires et de polarisation. Nous avons également effectué une analyse détaillée des propriétés rotationnelles de toutes les bandes identifiées, ce qui nous a permis de comprendre la physique qui sous-tend la structure des niveaux
This thesis reports on spectroscopic studies of very neutron-deficient nuclei in the mass region A ≈ 120. We performed the fusion evaporation reaction ⁶⁴Zn + ⁵⁸Ni and used the Jurogam 3 + MARA setup located at JYFL, Finland. More than 15 nuclei were produced in this reaction. Our study was mainly focused on three isotopes: ¹²⁰La, ¹¹⁷Cs, and ¹¹⁴I. We identified excited states in ¹²⁰La for the first time which makes ¹²⁰La the lightest isotope of lanthanum known spectroscopically. The observed states are organized in a cascade built on the ground state and a rotational band built on the πh_11/2 ⊗ νh_11/2 configuration. Cranked Nilsson Strutinsky calculations were performed to estimate the deformation parameters, and a two-quasiparticle plus triaxial rotor model was employed to describe the signature inversion and B(M1)/B(E2) transition probabilities. In the case of ¹¹⁷Cs, we found three new bands, established the ground state, and the excitation energies of bands 1 and 2. With the help of the mass spectra obtained at the focal plane of the MARA separator and the X-rays observed in the Jurogam 3 detector, we firmly assigned all the observed bands to ¹¹⁷Cs. Particle number conserving cranked shell model calculations were performed to check the assigned configurations to all bands. The calculations suggest that ¹¹⁷Cs is a deformed nucleus with ε₂ ≈ 0.32. We also studied the level structure of ¹¹⁴I, in which we found several low-lying states characterized by a small deformation, and three rotational bands at higher excitation energy based on larger deformation. We established the bandhead energy of all bands and thereby identified the ground state. Three new isomers were identified based on the imbalance in the intensities. The shell-model calculations suggest a prolate-oblate shape coexistence in ¹¹⁴I. In all this work, spins and parities were assigned based on angular correlation and polarisation measurements. We also performed a detailed analysis of the rotational properties of all identified bands, which helped us to understand the physics behind the level structure

Estilos ABNT, Harvard, Vancouver, APA, etc.

Chantler, Hannah Jane. "High-spin gamma-ray spectroscopy of doubly odd 124La; signature inversion in Ï€h11/2 x vh11/2 bands". Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396474.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Shirinda, Obed. "Signature splitting and inversion in the 186-194 Au Nuclei predicted by the total routhian surface (TRS) and cranked shell model (CSM) calculations". Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6814_1255091175.

Texto completo da fonte

Resumo:

The nearly oblate deformed Au nuclei show rotational bands built on multi quasiparticle excitations [Bou89, Bou92, Gue03, Gue01, Ven92]. Several of these bands are built on rotationally aligned high-j proton and neutron excitations. In many cases bands consisting of two or three signature partner E2 sequences are observed. For some fo these bands signature inversion is found and this feature gives a great challenge to the theoretical models. In this study the researcher performed TRS and CSM calculations for all high-j rotational bands in the p186-194s Au nuclei aiming to predict the signature splitting and inversion phemomena, alignments, gains in alignments, gains in alignment and band crossing frequencies observed.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Vandevoorde, Loïc. "Contribution à la caractérisation des revêtements par inversion des courbes V (z)". Valenciennes, 2006. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/5ee970e0-5094-4d66-96f7-0a013a8e5e24.

Texto completo da fonte

Resumo:

L'objectif de cette étude est de caractériser à l'aide de la méthode V(z) des revêtements en bronze d'aluminium Cu9. 5Al1Fe déposés à la torche plasma sur un substrat en acier bas carbone. La courbe V(z) est obtenue à partir du relevé de la tension électrique aux bornes d'un transducteur focalisé en fonction du déplacement (z), perpendiculairement à la surface de l'échantillon analysé. Le traitement d'inversion de la courbe V(z) permet d'obtenir le coefficient de réflexion R(Ө,f) de l'échantillon. La position des minima de R(Ө,f) peut être relié aux constantes élastiques ou à l'adhérence du revêtement. Dans le cas d'une couche déposée sur substrat, le calcul R(Ө,f) s'effectue à partir de la méthode récursive de Thomson-Haskell qui permet d'introduire différents niveaux d'adhérence entre les 2 milieux successifs, grâce à 2 constantes de raideur KL et KT de minimisation égale au carré de la différence entre le coefficient de réflexion mesuré et celui paramétré par les constantes élastiques ou les valeurs de KL et KT , l'optimisation est ensuite réalisée à partir de la méthode du simplexe. Les résultats expérimentaux ont permis de valider la méthode pour la détermination des constantes Cij de ces revêtements. Pour les échantillons présentant un défaut d'adhérence, les valeurs KL et KT trouvées sont de l'ordre de 1013 à 1014 Pa. M-1, alors qu'elles sont supéreures à 1015 Pa. M-1 pour les échantillons sains. Le classement des différents niveaux d'adhérence est comparé à la rugosité de la surface du substrat avant dépôt, et à la charge critique de fissuration à l'interface déterminée par indentation interfaciale
The study aims at characterizing the adhesion of plasma coatings using acoustic microscopy. The samples are Cu9. 5Al1Fe aluminium bronze air plasma spray coated low carbon steel plates. The experimental V(z) signal corresponds to the output voltage of the focalised transucer as a function of the distance between the surface of the sample and the focus. The inversion process operated on the V(z) signal gives the reflectance coefficient R(Ө,f) of the studied sample. The location of the R(Ө,f) minima is dependant on the elastic constants Cij and on the quality of the adhesion. For coated specimen, R can be evaluated by numerical computation, using the recursive method of Thomson Haskell which considers the continuity of both strains ans stresses. In the model developed by Achenbach it is considered that the lack of interfacial adhesion introduces a displacement gap at the interface tha can be related to the stress fiels correponding to the propagating waves thanks to the stiffness coefficients KL and KT. This leads to defining a deviation function which is a sum of quadratic terms corresponding to the difference between the measured R-coefficient and the simulated one versus the elastic constants or KL and KT. The optimization is performed using the simplex method. The results show that the V(z) metho enables to determine the elastic coefficients of the coating. In the case of samples with different adhesin levels, the values of stiffness constants are between 1013 and 1014 Pa. M-1. In the case of good adhesion levels, the values of stiffness constants are higher than 1015 Pa. M-1. The results obtained by acoustic microscopy are consistent with results obtained by destructive methods such as interfacial indentation and with substrate roughness measurements performed before coating

Estilos ABNT, Harvard, Vancouver, APA, etc.

Calou, Paul. "Mesure et compensation de bâtiments navals à l’aide de capteurs magnétiques trois composantes". Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAH018.

Texto completo da fonte

Resumo:

Cette thèse s’établit à la frontière du géomagnétisme et du magnétisme du navire, deux disciplines proches mais dont les habitudes diffèrent. Dans un premier temps, on présente les spécificités de chaque domaine en introduisant les principales notions clés ainsi que le type de mesure mis en oeuvre pour chaque domaine et les géométries d’acquisition. On vérifie également la validité des approximations utilisées dans les cas de figure rencontrés. Dans un deuxième temps (chapitre 2 et 3) on détaille le lien mathématique possible entre l’anomalie scalaire utilisée en géophysique et les trois composantes du champ d’anomalie. Le chapitre 4 résume les travaux expérimentaux réalisés, on présente le banc de test utilisé ainsi que les résultats obtenus sur données synthétiques et réelles pour la problématique de réglages des boucles d’immunisation. Dans le chapitre 5, une nouvelle approche concernant l’immunisation en boucle fermée pour un navire est présentée. On montre également un exemple de compensation réalisée sur un vrai navire à l’aide de capteurs embarqués. La thèse se termine avec le chapitre 6 qui est un article soumis à une revue scientifique synthétisant les problématiques de la thèse
This PhD thesis aims to apply geophysical practices to another magnetic branch which deals with ship’s signature and magnetization with different methods and habits. Firstly, we present the specificity and practices of each domain, introducing the key notions as well as the differences between each kind of measurement. We check the validity of the approximation corresponding to total-field magnetic anomalies in the particular case of our measurements. In a second time, chapter 2 and 3, a mathematical relation is demonstrated between the scalar anomaly and the three components of the anomaly field based on the equivalent layer method. Chapter 4 summarize the experimental work, focusing on the determination of the best electrical current to compensate the ship’s magnetic signature. The experimental system is presented as well as the main results obtained. In chapter 5, a new approach for closed loop degaussing system is presented, based on a compensation algorithm. We also show some results obtained thanks to the compensation with three-component magnetometers onboard a real ship. Chapter 6 corresponds to an article submitted to a scientific journal (IEEE) that summarize most of the problematics of the thesis

Estilos ABNT, Harvard, Vancouver, APA, etc.

Capítulos de livros sobre o assunto "Signature inversion"

Bellare, Mihir, Chanathip Namprempre, David Pointcheval e Michael Semanko. "The Power of RSA Inversion Oracles and the Security of Chaum’s RSA-Based Blind Signature Scheme". In Financial Cryptography, 319–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-46088-8_25.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Lenstra, Arjen K. "Generating standard DSA signatures without long inversion". In Lecture Notes in Computer Science, 57–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/bfb0034835.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Chen, Yangjun, e Yong Shi. "Signature Files and Signature File Construction". In Encyclopedia of Database Technologies and Applications, 638–45. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-560-3.ch105.

Texto completo da fonte

Resumo:

Estilos ABNT, Harvard, Vancouver, APA, etc.

Chen, Yangjun. "An Overview on Signature File Techniques". In Handbook of Research on Innovations in Database Technologies and Applications, 644–54. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-242-8.ch069.

Texto completo da fonte

Resumo:

An important question in information retrieval is how to create a database index which can be searched efficiently for the data one seeks. Today, one or more of the following four techniques have been frequently used: full text searching, B-trees, inversion and the signature file. Full text searching imposes no space overhead, but requires long response time. In contrast, B-trees, inversion and the signature file work quickly, but need a large intermediary representation structure (index), which provides direct links to relevant data. In this paper, we concentrate on the techniques of signature files and discuss different construction approaches of a signature file. The signature technique cannot only be used in document databases, but also in relational and object-oriented databases. In a document database, a set of semistructured (XML) documents is stored and the queries related to keywords are frequently evaluated. To speed up the evaluation of such queries, we can construct signatures for words and superimpose them to establish signatures for document blocks, which can be used to cut off non-relevant documents as early as possible when evaluating a query. Especially, such a method can be extended to handle the socalled containment queries, for which not only the key words, but also the hierarchical structure of a document has to be considered. We can also handle queries issued to a relational or an objectoriented database using the signature technique by establishing signatures for attribute values, tuples, as well as tables and classes.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Pratt, George. "Second Level Dominants". In The Dynamics of Harmony Principles & Practice, 30–36. Oxford University PressOxford, 1996. http://dx.doi.org/10.1093/oso/9780198790204.003.0004.

Texto completo da fonte

Resumo:

Abstract In Chapter 2 we experienced the tension of V(7) which is released by its resolution to I. Similarly the supertonic generates tension which is resolved by V. The supertonic is the ‘dominant of the dominant’, is V of V, or a second-level dominant. The apparent constraints of a key signature make the supertonic appear, at first sight, to be a minor chord in major keys and diminished in minor keys. In practice However, the chord can be almost as readily major (indicated by II) as minor (ii) while the pinched sound of the diminished form is relieved by using it in first inversion, Ex. 4a.

Estilos ABNT, Harvard, Vancouver, APA, etc.

Trabalhos de conferências sobre o assunto "Signature inversion"

Calef, Brandoch, John Africano, Brian Birge, Doyle Hall e Paul Kervin. "Photometric signature inversion". In SPIE Optics + Photonics, editado por Victor L. Gamiz, Paul S. Idell e Marija S. Strojnik. SPIE, 2006. http://dx.doi.org/10.1117/12.683015.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Landrø, M., e R. Sollie. "Source signature determination by inversion". In SEG Technical Program Expanded Abstracts 1992. Society of Exploration Geophysicists, 1992. http://dx.doi.org/10.1190/1.1822199.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Cunha Filho, C. A. "A Pragmatic Approach to Seismic Signature Inversion". In Second EAGE/SBGf Workshop 2014. Netherlands: EAGE Publications BV, 2014. http://dx.doi.org/10.3997/2214-4609.20147400.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Ryzhikov, Gennady A., e Marina S. Biryulina. "Removal of intrabed multiples via source‐signature invariant inversion". In SEG Technical Program Expanded Abstracts 1999. Society of Exploration Geophysicists, 1999. http://dx.doi.org/10.1190/1.1820685.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Aaker, Ole Edvard, Espen Birger Raknes e Ørjan Pedersen. "Newton-type inversion for source signature and medium parameters". In First International Meeting for Applied Geoscience & Energy. Society of Exploration Geophysicists, 2021. http://dx.doi.org/10.1190/segam2021-3581908.1.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Akçelik, Volkan, Huseyin Denli, Alex Kanevsky, Kinesh K. Patel, Laurent White e Martin‐Daniel Lacasse. "Multiparameter material model and source signature full waveform inversion". In SEG Technical Program Expanded Abstracts 2011. Society of Exploration Geophysicists, 2011. http://dx.doi.org/10.1190/1.3627692.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Alexa, P. "The microscopic analysis of signature inversion in odd-odd nuclei". In The tenth international symposium on capture gamma-ray spectroscopyand related topics. AIP, 2000. http://dx.doi.org/10.1063/1.1361432.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Li, Guofa, Xiaolong Yin*, Zi Liu e Mingqiang Cao. "Directional deconvolution of air gun array signature via nonstationary inversion scheme". In SEG Technical Program Expanded Abstracts 2015. Society of Exploration Geophysicists, 2015. http://dx.doi.org/10.1190/segam2015-5836115.1.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Ziolkowski, A. "Robust Inversion of Land Seismic Dynamite Data for Source Signature Determination". In 82nd EAGE Annual Conference & Exhibition. European Association of Geoscientists & Engineers, 2021. http://dx.doi.org/10.3997/2214-4609.202012218.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Yuhu, Zhang, Zhou Xiaohong, Zhao Qingzhong, Sun Xiangfu, Lei Xiangguo, Guo Yingxiang, Liu Zhong et al. "Search for Signature Inversion of Yrast Band in Odd-Odd 162Lu Nucleus". In Proceedings of the Second International Symposium. WORLD SCIENTIFIC, 1996. http://dx.doi.org/10.1142/9789814447195_0036.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Oferecemos descontos em todos os planos premium para autores cujas obras estão incluídas em seleções literárias temáticas. Contate-nos para obter um código promocional único!