Relevant bibliographies by topics / Primary multiple separation

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Primary multiple separation'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Primary multiple separation"

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Herrmann, Felix J., Deli Wang, and Dirk J. (Eric) Verschuur. "Adaptive curvelet-domain primary-multiple separation." GEOPHYSICS 73, no. 3 (2008): A17—A21. http://dx.doi.org/10.1190/1.2904986.

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In many exploration areas, successful separation of primaries and multiples greatly determines the quality of seismic imaging. Despite major advances made by surface-related multiple elimination (SRME), amplitude errors in the predicted multiples remain a problem. When these errors vary for each type of multiple in different ways (as a function of offset, time, and dip), they pose a serious challenge for conventional least-squares matching and for the recently introduced separation by curvelet-domain thresholding. We propose a data-adaptive method that corrects amplitude errors, which vary smoothly as a function of location, scale (frequency band), and angle. With this method, the amplitudes can be corrected by an elementwise curvelet-domain scaling of the predicted multiples. We show that this scaling leads to successful estimation of primaries, despite amplitude, sign, timing, and phase errors in the predicted multiples. Our results on synthetic and real data show distinct improvements over conventional least-squares matching in terms of better suppression of multiple energy and high-frequency clutter and better recovery of estimated primaries.
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Wu, Xiang, and Barry Hung. "High-fidelity Adaptive Curvelet Domain Primary-Multiple Separation." ASEG Extended Abstracts 2013, no. 1 (2013): 1–4. http://dx.doi.org/10.1071/aseg2013ab094.

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Wu, Xiang, and Barry Hung. "Adaptive primary-multiple separation using 3D curvelet transform." ASEG Extended Abstracts 2015, no. 1 (2015): 1–4. http://dx.doi.org/10.1071/aseg2015ab157.

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Herrmann, Felix J., Urs Böniger, and Dirk Jacob (Eric) Verschuur. "Non-linear primary-multiple separation with directional curvelet frames." Geophysical Journal International 170, no. 2 (2007): 781–99. http://dx.doi.org/10.1111/j.1365-246x.2007.03360.x.

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Subarsyah, Subarsyah, and Tumpal Benhard Nainggolan. "ATENUASI WATER-BOTTOM MULTIPLE DENGAN METODE TRANSFORMASI PARABOLIC RADON." JURNAL GEOLOGI KELAUTAN 12, no. 3 (2016): 145. http://dx.doi.org/10.32693/jgk.12.3.2014.254.

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Interferensi water-bottom multipel terhadap reflektor primer menimbulkan efek bersifat destruktif yang menyebabkan penampang seismik menjadi tidak tepat akibat kehadiran reflektor semu. Teknik demultiple perlu diaplikasikan untuk mengatenuasi multipel. Transformasi parabolic radon merupakan teknik atenuasi multipel dengan metode pemisahan dalam domain radon. Multipel sering teridentifikasi pada penampang seismik. Untuk memperbaiki penampang seismik akan dilakukan dengan metode transformasi parabolic radon. Penerapan metode ini mengakibatkan reflektor multipel melemah dan tereduksi setelah dilakukan muting dalam domain radon terhadap zona multipel. Beberapa reflektor primer juga ikut melemah akibat pemisahan dalam domain radon yang kurang optimal, pemisahan akan optimal membutuhkan distribusi offset yang lebar.
 
 Kata kunci: Parabolic radon, multipel, atenuasi
 
 
 Water-bottom mutiple interference often destructively interfere with primary reflection that led to incorrect seismic section due to presence apparent reflector. Demultiple techniques need to be applied to attenuate the multiple. Parabolic Radon transform is demultiple attenuation technique that separate multiple and primary in radon domain. Water-bottom mutiple ussualy appear and easly identified on seismic data, parabolic radon transform applied to improve the seismic section. Application of this method to data showing multiple reflectors weakened and reduced after muting multiple zones in the radon domain. Some of the primary reflector also weakened due to bad separation in radon domain, optimal separation will require a wide distribution of offsets.
 
 Keywords: Parabolic radon, multiple, attenuation
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Schoenberger, Michael, and Louis M. Houston. "Stationarity transformation of multiples to improve the performance of predictive deconvolution." GEOPHYSICS 63, no. 2 (1998): 723–37. http://dx.doi.org/10.1190/1.1444372.

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Predictive deconvolution is a very effective multiple attenuator for zero‐offset data and for nonzero offset data acquired in water depths less than 100 m. However, predictive deconvolution’s efficacy degrades rapidly with offset, a degradation that correlates highly with nonstationarity of the primary‐to‐multiple traveltime separation. For model data, predictive deconvolution’s performance degrades by a factor of two when the multiple period changes by only 5 ms (20% of the seismic wavelet’s dominant period) within the deconvolution gate. For two‐thirds of the model‐data offsets, the change in primary‐multiple separation on each trace exceeds 40% of the dominant period, and deconvolution is completely ineffective at removing multiples. We develop a stationarity transform, which is a moveout operation or a time‐variable time shift that can be applied separately to each trace. The stationarity transform stabilizes the traveltime separation between primary and first‐order multiple, based upon the assumptions of hyperbolic moveout, layer‐cake geology, and Dix multiple velocities. After applying the stationarity transform to a model data set consisting of primaries and first‐order multiples only, predictive deconvolution suppresses multiples at the theoretical suppression limit for all offsets. Furthermore, predictive deconvolution is equally effective for low‐frequency and high‐frequency wavelets. When the data set is made more realistic by including higher‐order multiples, predictive deconvolution’s ability to suppress multiple reflections degrades only slightly with offset. Stationarity transformation also improves predictive deconvolution’s multiple suppression on a real data set. Because the real data set is from a region where the water depth is shallower than 100 m, predictive deconvolution suppresses multiples effectively on the near‐ and middle‐offset traces, even without stationarity transformation. However, on the farthest offsets, stationarity transformation improves the efficacy of predictive deconvolution significantly.
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Liu, Kuang-Hung, and William H. Dragoset. "Blind-source separation of seismic signals based on information maximization." GEOPHYSICS 78, no. 4 (2013): V119—V130. http://dx.doi.org/10.1190/geo2012-0136.1.

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Prediction methods for seismic multiples are never ideal in practice and an adaptive subtraction process is needed to account for mismatches between the predicted and the actual multiples. We are interested in the problem of separating primary and multiple seismic signals based on their statistical properties. We link recent advances in the blind-source separation problem to the multiple removal problem, and present a novel adaptive subtraction method based on an information maximization principle. Compared with previous methods, our proposed method uses higher-order statistics of the data and incorporates the filtering nature of the adaptive subtraction problem into our algorithm formulation. We use simulations to show that our proposed adaptive subtraction method outperforms the popular least-squares adaptive subtraction and the independent component analysis methods quantitatively, as measured by the mean-squared error, and qualitatively, as evaluated by the visual quality of the image reconstruction.
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Burton, Andrew, and Larry Lines. "VSP detection of interbed multiples using inside‐outside corridor stacking." GEOPHYSICS 62, no. 5 (1997): 1628–35. http://dx.doi.org/10.1190/1.1444265.

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One of the most difficult problems in the exploration of Devonian reefs is the separation of primaries and short period interbed multiples. This is especially true in cases where weak primary reflections from porous reefal carbonates can be easily masked by interbed multiples generated from stronger shale/carbonate reflections above the reef. This problem of primary‐multiple separation is difficult since there are small normal moveout differences between the primary and short‐period multiple reflections, thus stacking might not be as effective at suppressing multiples as one would hope. Also, predictive deconvolution may be ineffective if it is difficult to design an accurate prediction distance for the deconvolution filter. The ineffectiveness of stacking and deconvolution in some cases has caused us to look for other alternatives. A recent paper by Lines (1996) advocates the use of shaping deconvolution and inversion methods that use well log information. Since reliable well log data are not always available, we examine a vertical seismic profiling (VSP) corridor stacking method for multiple identification proposed in Hardage (1983, 154–155) which obviates some of the conventional problems and which does not require well log data. A variation of this concept was applied to long‐period multiple attenuation by Hampson and Mewhort (1983).
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Donno, Daniela. "Improving multiple removal using least-squares dip filters and independent component analysis." GEOPHYSICS 76, no. 5 (2011): V91—V104. http://dx.doi.org/10.1190/geo2010-0332.1.

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The suppression of multiple events is a crucial task in seismic data processing, and the adaptive subtraction of the predicted multiples is recognized as one of the main challenges for the success of the surface-related multiple elimination technique. The traditional least-squares matching approach can affect the primary events because the estimated multiples tend to adapt to the primaries under the minimum energy condition. We investigate two filtering techniques for improving the multiple removal results. In the first proposed method, we combine the advantages of the least-squares and pattern dip-based subtraction methods. Doing so, we exploit the separation of primaries and multiples in the dip domain, and then we apply the least-squares adaptive subtraction in each dip band before recomposing the data to obtain the final subtraction result. As a result of the dip decomposition, the primary-multiple interferences are reduced, allowing for a more reliable least-squares filtering. In the second method, we propose to replace the multiple subtraction step by a separation step using independent component analysis (ICA) methods. We employ the ICA method after least-squares adaptive filtering. Because of the non-Gaussian distributions of the involved signals, primaries and multiples can be separated by computing the optimal rotation between these two signals. We apply the ICA method in local 2D time-space windows to better compensate the space and time variant character of the data. Two-dimensional synthetic and field data examples demonstrate that the multiple subtraction results of both methods are indeed improved with respect to the classical least-squares method.
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Muijs, Remco, Johan O. Robertsson, and Klaus Holliger. "Prestack depth migration of primary and surface-related multiple reflections: Part I — Imaging." GEOPHYSICS 72, no. 2 (2007): S59—S69. http://dx.doi.org/10.1190/1.2422796.

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Surface-related multiples (i.e., all seismic waves reflected at the free surface at least once) often severely contaminate seismic recordings. Because conventional imaging techniques require input data that consist of primary reflections only, significant processing effort is commonly dedicated to attenuating multiples prior to migration. On the other hand, surface-related multiples provide additional illumination of the subsurface and, therefore, should not be considered as noise. We present a prestack depth-migration method that allows primary and multiple reflections to be imaged simultaneously. Depth imaging using primary and multiple reflections (DIPMR) involves decomposing the datainto upgoing and downgoing wave constituents, followed by downward extrapolation. Artifacts generated by interference of upgoing and downgoing events not associated with the same subsurface reflection points (crosstalk) are attenuated by using a 2D deconvolution imaging condition. In contrast to existing methods, DIPMR does not require a priori information about the source signature or directivity, because the illuminating source wavefield is extracted directly from the data themselves via the up/down separation. Moreover, there is no need for elimination nor identification of multiples prior to migration. By including surface-related multiples in the imaging procedure, the effective source wavefield is stronger, the spatial aperture is wider, and a higher vertical resolution is enabled through the application of a deconvolution-based imaging condition.
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Dissertations / Theses on the topic "Primary multiple separation"

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Herrmann, Felix J., and Dirk J. Verschuur. "Robust curvelet-domain primary-multiple separation with sparseness constraints." European Association of Geoscientists & Engineers, 2005. http://hdl.handle.net/2429/454.

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A non-linear primary-multiple separation method using curvelets frames is presented. The advantage of this method is that curvelets arguably provide an optimal sparse representation for both primaries and multiples. As such curvelets frames are ideal candidates to separate primaries from multiples given inaccurate predictions for these two data components. The method derives its robustness regarding the presence of noise; errors in the prediction and missing data from the curvelet frame's ability (i) to represent both signal components with a limited number of multi-scale and directional basis functions; (ii) to separate the components on the basis of differences in location, orientation and scales and (iii) to minimize correlations between the coefficients of the two components. A brief sketch of the theory is provided as well as a number of examples on synthetic and real data.
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Saab, Rayan, Deli Wang, Ozgur Yilmaz, and Felix J. Herrmann. "Curvelet-based primary-multiple separation from a Bayesian perspective." Society of Exploration Geophysicists, 2007. http://hdl.handle.net/2429/562.

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In this abstract, we present a novel primary-multiple separation scheme which makes use of the sparsity of both primaries and multiples in a transform domain, such as the curvelet transform, to provide estimates of each. The proposed algorithm utilizes seismic data as well as the output of a preliminary step that provides (possibly) erroneous predictions of the multiples. The algorithm separates the signal components, i.e., the primaries and multiples, by solving an optimization problem that assumes noisy input data and can be derived from a Bayesian perspective. More precisely, the optimization problem can be arrived at via an assumption of a weighted Laplacian distribution for the primary and multiple coefficients in the transform domain and of white Gaussian noise contaminating both the seismic data and the preliminary prediction of the multiples, which both serve as input to the algorithm.
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Wang, Deli, Rayan Saab, Ozgur Yilmaz, and Felix J. Herrmann. "Recent results in curvelet-based primary-multiple separation: application to real data." Society of Exploration Geophysicists, 2007. http://hdl.handle.net/2429/565.

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In this abstract, we present a nonlinear curvelet-based sparsitypromoting formulation for the primary-multiple separation problem. We show that these coherent signal components can be separated robustly by explicitly exploting the locality of curvelets in phase space (space-spatial frequency plane) and their ability to compress data volumes that contain wavefronts. This work is an extension of earlier results and the presented algorithms are shown to be stable under noise and moderately erroneous multiple predictions.
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Herrmann, Felix J., Gilles Hennenfent, and Peyman P. Moghaddam. "Seismic imaging and processing with curvelets." European Association of Geoscientists & Engineers, 2007. http://hdl.handle.net/2429/552.

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In this paper, we present a nonlinear curvelet-based sparsity-promoting formulation for three problems in seismic processing and imaging namely, seismic data regularization from data with large percentages of traces missing; seismic amplitude recovery for subsalt images obtained by reverse-time migration and primary-multiple separation, given an inaccurate multiple prediction. We argue why these nonlinear formulations are beneficial.
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Book chapters on the topic "Primary multiple separation"

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Abt, H. A. "Visual Binary Separations as Functions of Primary Types, Ages, and Locations." In Wide Components in Double and Multiple Stars. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2987-6_19.

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Chen, Yuhan, Youyu Lu, Tianyi Gu, Zhirui Bian, Likai Wang, and Ziyu Tong. "From Separation to Incorporation - A Full-Circle Application of Computational Approaches to Performance-Based Architectural Design." In Proceedings of the 2021 DigitalFUTURES. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_18.

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AbstractIn performance-based architectural design, most existing techniques and design approaches to assisting designers are primarily for a single design problem such as building massing, spatial layouts, or facade design. However, architectural design is a synthesis process that considers multiple design problems. Thus, for achieving an overall improvement in building performance, it is critical to incorporate computational techniques and methods into all key design problems. In this regard, this paper presents a full-circle application of different computational design approaches and tools to exploit the potential of building performance in driving architectural design towards more novel and sustainable buildings as well as to explore new research design paradigms for performance-based architectural design in real-world design scenarios. This paper takes a commercial complex building design as an example to demonstrate how building performance can be incorporated into different building design problems and reflect on the limitations of existing tools in supporting the architectural design.
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McKnight, Rebecca, Jonathan Price, and John Geddes. "People presenting with physical disorder." In Psychiatry. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198754008.003.0027.

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All healthcare professionals dealing primarily with physical disorder need a working knowledge of relevant psychological factors and psychiatric dis­orders. Despite the geographical and, often, cul­tural separation of most ‘general’ (i.e. physical) and psychiatric hospitals, there are close links (1) be­tween physical and psychological disorders, and (2) between physical and psychological factors in the aetiology, presentation, and management of all illness. This chapter aims to stimulate you to think about these issues in primary care and in the general hospital, and to equip you with the know­ledge required to think about them in an integrated, biopsychosocial way. The links between physical and psychological fac­tors are multiple. They include: … ● psychiatric and physical disorders occurring together by chance— as they are both common; ● psychiatric disorders causing physical symptoms— for example, depression is associated with low physical energy (anergia), amenorrhoea, and constipation; ● psychiatric disorder adversely affecting the outcome of physical disorder— for example, a depressive disorder might impair self- management of diabetes mellitus, because low motivation is a common symptom of depression, and may reduce adherence to self- monitoring of glucose; ● psychological factors increasing disability associated with physical disorder— for example, if a patient recovering from a myocardial infarction believes that it has led to a permanent reduction in their cardiac function, they are less likely to return to work, to take regular exercise, and to have a normal sex life; ● untreated psychological problems leading to the inappropriate use of medical resources and to poor compliance with medical advice— for example, people with panic disorder are more likely to attend emergency departments with acute ‘cardiac’ symptoms; ● physical symptoms and disorders having psychological consequences, which include psychiatric disorder— for example, hypothyroidism and cerebrovascular disease may lead to depression; ● physical disorder exacerbating unrelated psychiatric symptoms— for example, a viral infection could delay recovery from a depressive disorder, by impairing the person’s usual activities, at work and at home, which would otherwise provide therapeutic distraction and stimulation.
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Gosden, Chris. "Humanized Environments." In Humans and the Environment. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199590292.003.0029.

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It is now well known that there is a spectrum of views about humans and the world they live in, ranging from the concept of the environment as an external force to the idea that people exist through a series of relations which it makes little sense to divide up as culture on the one hand and nature on the other. It is worth thinking through the implications of these varied views briefly (although I do not want to duplicate Davies’s detailed introduction in Chapter 1), so that we can think about what is lost and gained when trying to combine nature and culture, my main aim in current work. Let us start with views in which there is a radical separation of people and the physical world. In such views, which are in themselves varied, the physical world is seen as a series of energy budgets and nutrients that people have to extract in the most cost-efficient way possible in order to maintain life. Leslie White (1949) made a three-fold division between the physical, the biological, and the cultural. Academic study, in which physicists, chemists, or earth scientists probe the physical state of the universe, biologists investigate living things, and the social sciences and humanities focus on the human world, was not constructed around a series of heuristic divisions, but instead mirrored reality, White argued. Culture was also divided into three levels, of which the first, technology determined social organization and ideology. The primary function of culture for White was the harnessing of energy and the more efficiently this was done, the more it allowed for organizational complexity and multiple ideologies. Human history moved by revolutions in energy capture from early periods in which human muscles were key, to the agricultural revolution where plants and animals were domesticated to increase food supplies and animals could be used for traction, through to the industrial revolution (and the possibility of a future nuclear revolution) (see also Armstrong Oma, Chapter 11 this volume).
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Göpfert, Mirco. "A Handful of Gendarmes, Two Worlds, and the Frontier Between." In Policing the Frontier. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501747212.003.0001.

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This chapter provides a background of the gendarmerie brigade in Godiya, one of Niger's almost sixty so-called brigades territoriales, the gendarmerie's street-level units tasked primarily with criminal investigations. The particular case of the Nigerien gendarmerie sheds light on what may be in the dark but is nonetheless essential to any police and bureaucratic organization: fragile police legitimacy, the lag between les textes and le social, between official norms and human practices, bureaucratic formats and the complexity of lived life, and all of this in the context of multiple conflicting, often incompatible expectations and demands from within and without one's own organization. While enforcing the law, the gendarmes formatted stories about peoples' lives to fit the needs of the bureaucratic form. While producing arrangements, they kept these forms and lives apart, thereby allowing for mutually compatible forms of sociality and morality. The one produced separation through connection, the other connection through separation. This ambivalent coexistence of connection and separation is what this book wants to grasp with the notion of the frontier.
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Floudas, Christodoulos A. "Introduction." In Nonlinear and Mixed-Integer Optimization. Oxford University Press, 1995. http://dx.doi.org/10.1093/oso/9780195100563.003.0004.

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This chapter introduces the reader to elementary concepts of modeling, generic formulations for nonlinear and mixed integer optimization models, and provides some illustrative applications. Section 1.1 presents the definition and key elements of mathematical models and discusses the characteristics of optimization models. Section 1.2 outlines the mathematical structure of nonlinear and mixed integer optimization problems which represent the primary focus in this book. Section 1.3 illustrates applications of nonlinear and mixed integer optimization that arise in chemical process design of separation systems, batch process operations, and facility location/allocation problems of operations research. Finally, section 1.4 provides an outline of the three main parts of this book. A plethora of applications in all areas of science and engineering employ mathematical models. A mathematical model of a system is a set of mathematical relationships (e.g., equalities, inequalities, logical conditions) which represent an abstraction of the real world system under consideration. Mathematical models can be developed using (i) fundamental approaches, (ii) empirical methods, and (iii) methods based on analogy. In (i), accepted theories of sciences are used to derive the equations (e.g., Newton’s Law). In (ii), input-output data are employed in tandem with statistical analysis principles so as to generate empirical or “black box” models. In (iii), analogy is employed in determining the essential features of the system of interest by studying a similar, well understood system. The variables can take different values and their specifications define different states of the system. They can be continuous, integer, or a mixed set of continuous and integer. The parameters are fixed to one or multiple specific values, and each fixation defines a different model. The constants are fixed quantities by the model statement. The mathematical model relations can be classified as equalities, inequalities, and logical conditions. The model equalities are usually composed of mass balances, energy balances, equilibrium relations, physical property calculations, and engineering design relations which describe the physical phenomena of the system. The model inequalities often consist of allowable operating regimes, specifications on qualities, feasibility of heat and mass transfer, performance requirements, and bounds on availabilities and demands. The logical conditions provide the connection between the continuous and integer variables.
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Algarín, Alberto De la Rosa, Steven A. Demurjian, Timoteus B. Ziminski, Yaira K. Rivera Sánchez, and Robert Kuykendall. "Securing XML with Role-Based Access Control." In E-Health and Telemedicine. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8756-1.ch025.

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Today's applications are often constructed by bringing together functionality from multiple systems that utilize varied technologies (e.g. application programming interfaces, Web services, cloud computing, data mining) and alternative standards (e.g. XML, RDF, OWL, JSON, etc.) for communication. Most such applications achieve interoperability via the eXtensible Markup Language (XML), the de facto document standard for information exchange in domains such as library repositories, collaborative software development, health informatics, etc. The use of a common data format facilitates exchange and interoperability across heterogeneous systems, but challenges in the aspect of security arise (e.g. sharing policies, ownership, permissions, etc.). In such situations, one key security challenge is to integrate the local security (existing systems) into a global solution for the application being constructed and deployed. In this chapter, the authors present a Role-Based Access Control (RBAC) security framework for XML, which utilizes extensions to the Unified Modeling Language (UML) to generate eXtensible Access Control Markup Language (XACML) policies that target XML schemas and instances for any application, and provides both the separation and reconciliation of local and global security policies across systems. To demonstrate the framework, they provide a case study in health care, using the XML standards Health Level Seven's (HL7) Clinical Document Architecture (CDA) and the Continuity of Care Record (CCR). These standards are utilized for the transportation of private and identifiable information between stakeholders (e.g. a hospital with an electronic health record, a clinic's electronic health record, a pharmacy system, etc.), requiring not only a high level of security but also compliance to legal entities. For this reason, it is not only necessary to secure private information, but for its application to be flexible enough so that updating security policies that affect millions of documents does not incur a large monetary or computational cost; such privacy could similarly involve large banks and credit card companies that have similar information to protect to deter identity theft. The authors demonstrate the security framework with two in-house developed applications: a mobile medication management application and a medication reconciliation application. They also detail future trends that present even more challenges in providing security at global and local levels for platforms such as Microsoft HealthVault, Harvard SMART, Open mHealth, and open electronic health record systems. These platforms utilize XML, equivalent information exchange document standards (e.g., JSON), or semantically augmented structures (e.g., RDF and OWL). Even though the primary use of these platforms is in healthcare, they present a clear picture of how diverse the information exchange process can be. As a result, they represent challenges that are domain independent, thus becoming concrete examples of future trends and issues that require a robust approach towards security.
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Algarín, Alberto De la Rosa, Steven A. Demurjian, Timoteus B. Ziminski, Yaira K. Rivera Sánchez, and Robert Kuykendall. "Securing XML with Role-Based Access Control." In Architectures and Protocols for Secure Information Technology Infrastructures. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4514-1.ch013.

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Today’s applications are often constructed by bringing together functionality from multiple systems that utilize varied technologies (e.g. application programming interfaces, Web services, cloud computing, data mining) and alternative standards (e.g. XML, RDF, OWL, JSON, etc.) for communication. Most such applications achieve interoperability via the eXtensible Markup Language (XML), the de facto document standard for information exchange in domains such as library repositories, collaborative software development, health informatics, etc. The use of a common data format facilitates exchange and interoperability across heterogeneous systems, but challenges in the aspect of security arise (e.g. sharing policies, ownership, permissions, etc.). In such situations, one key security challenge is to integrate the local security (existing systems) into a global solution for the application being constructed and deployed. In this chapter, the authors present a Role-Based Access Control (RBAC) security framework for XML, which utilizes extensions to the Unified Modeling Language (UML) to generate eXtensible Access Control Markup Language (XACML) policies that target XML schemas and instances for any application, and provides both the separation and reconciliation of local and global security policies across systems. To demonstrate the framework, they provide a case study in health care, using the XML standards Health Level Seven’s (HL7) Clinical Document Architecture (CDA) and the Continuity of Care Record (CCR). These standards are utilized for the transportation of private and identifiable information between stakeholders (e.g. a hospital with an electronic health record, a clinic’s electronic health record, a pharmacy system, etc.), requiring not only a high level of security but also compliance to legal entities. For this reason, it is not only necessary to secure private information, but for its application to be flexible enough so that updating security policies that affect millions of documents does not incur a large monetary or computational cost; such privacy could similarly involve large banks and credit card companies that have similar information to protect to deter identity theft. The authors demonstrate the security framework with two in-house developed applications: a mobile medication management application and a medication reconciliation application. They also detail future trends that present even more challenges in providing security at global and local levels for platforms such as Microsoft HealthVault, Harvard SMART, Open mHealth, and open electronic health record systems. These platforms utilize XML, equivalent information exchange document standards (e.g., JSON), or semantically augmented structures (e.g., RDF and OWL). Even though the primary use of these platforms is in healthcare, they present a clear picture of how diverse the information exchange process can be. As a result, they represent challenges that are domain independent, thus becoming concrete examples of future trends and issues that require a robust approach towards security.
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Conference papers on the topic "Primary multiple separation"

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Wu, X., and B. Hung. "High-fidelity Adaptive Curvelet Domain Primary-Multiple Separation." In 75th EAGE Conference and Exhibition incorporating SPE EUROPEC 2013. EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20130516.

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Wu*, Xiang, and Barry Hung. "Primary-multiple separation promoted by volumetric ultra-sparseness." In Beijing 2014 International Geophysical Conference & Exposition, Beijing, China, 21-24 April 2014. Society of Exploration Geophysicists and Chinese Petroleum Society, 2014. http://dx.doi.org/10.1190/igcbeijing2014-098.

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Herrmann, F. J., and D. J. Verschuur. "Robust Curvelet-Domain Primary-Multiple Separation with Sparseness Constraints." In 67th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.1.p226.

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Saab, Rayan, Deli Wang, Özgür Yilmaz, and Felix J. Herrmann. "Curvelet‐based primary‐multiple separation from a Bayesian perspective." In SEG Technical Program Expanded Abstracts 2007. Society of Exploration Geophysicists, 2007. http://dx.doi.org/10.1190/1.2792988.

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Jiang, B., and W. Lu. "Fast and Robust Primary-Multiple Separation in the Curvelet Domain." In 82nd EAGE Annual Conference & Exhibition. European Association of Geoscientists & Engineers, 2020. http://dx.doi.org/10.3997/2214-4609.202011201.

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Wang, Deli, Rayan Saab, Ozgur Yilmaz, and Felix J. Herrmann. "Recent results in curvelet‐based primary‐multiple separation: Application to real data." In SEG Technical Program Expanded Abstracts 2007. Society of Exploration Geophysicists, 2007. http://dx.doi.org/10.1190/1.2792986.

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Xu, Gang, Yourong Lu, Jun He, and Ning Hu. "Primary Users Detect for Multiple-Antenna Cognitive Radio Based on Blind Source Separation." In 2008 International Symposium on Intelligent Information Technology Application Workshops (IITAW). IEEE, 2008. http://dx.doi.org/10.1109/iita.workshops.2008.112.

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O. Frijlink, M., R. Shahidi, F. J. Herrmann, and R. G. van Borselen. "A Comparison of Standard Adaptive Subtraction and Primary-multiple Separation in the Curvelet Domain." In 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201401263.

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Shahidi, Reza, and Felix J. Herrmann. "Curvelet‐domain matched filtering with frequency‐domain regularization and an application to primary‐multiple separation." In SEG Technical Program Expanded Abstracts 2009. Society of Exploration Geophysicists, 2009. http://dx.doi.org/10.1190/1.3255624.

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Hill, R. N., T. A. Taiwo, J. A. Stillman, et al. "Multiple Tier Fuel Cycle Studies for Waste Transmutation." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22575.

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Abstract:
As part of the U.S. Department of Energy Advanced Accelerator Applications Program, a systems study was conducted to evaluate the transmutation performance of advanced fuel cycle strategies. Three primary fuel cycle strategies were evaluated: dual-tier systems with plutonium separation, dual-tier systems without plutonium separation, and single-tier systems without plutonium separation. For each case, the system mass flow and TRU consumption were evaluated in detail. Furthermore, the loss of materials in fuel processing was tracked including the generation of new waste streams. Based on these results, the system performance was evaluated with respect to several key transmutation parameters including TRU inventory reduction, radiotoxicity, and support ratio. The importance of clean fuel processing (∼0.1% losses) and inclusion of a final tier fast spectrum system are demonstrated. With these two features, all scenarios capably reduce the TRU and plutonium waste content, significantly reducing the radiotoxicity; however, a significant infrastructure (at least 1/10 the total nuclear capacity) is required for the dedicated transmutation system.
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