Relevant bibliographies by topics / Metrica frw

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Metrica frw'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Metrica frw"

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Moradpour, H., A. Dehghani, and M. T. Mohammadi Sabet. "Dynamic black holes in an FRW background: Lemaître transformations." Modern Physics Letters A 30, no. 39 (2015): 1550207. http://dx.doi.org/10.1142/s0217732315502077.

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Since the conformal transformations of metric do not change its causal structure, we use these transformations to embed the Lemaître metrics into the FRW background. In our approach, conformal transformation is in agreement with the universe expansion regimes. Indeed, we use the Lemaître metrics because the horizon singularity is eliminated in these metrics. Moreover, some physical and mathematical properties of the introduced metrics have been addressed. We show that the resultant metrics include event horizons while their physical radii are increasing as a function of the universe expansion
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Iihoshi, M., S. V. Ketov, and A. Morishita. "Conformally Flat FRW Metrics." Progress of Theoretical Physics 118, no. 3 (2007): 475–89. http://dx.doi.org/10.1143/ptp.118.475.

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KHOSRAVI, SHAHRAM, REZA MANSOURI, and EHSAN KOURKCHI. "MODIFIED AVERAGING PROCESSES IN COSMOLOGY AND THE STRUCTURED FRW MODEL." International Journal of Modern Physics D 18, no. 07 (2009): 1177–92. http://dx.doi.org/10.1142/s0218271809015011.

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We study the volume averaging of inhomogeneous metrics within GR and discuss its shortcomings, such as gauge dependence, singular behavior as a result of caustics, and causality violations. To remedy these shortcomings, we suggest some modifications to this method. As a case study we focus on the inhomogeneous structured FRW model based on a flat LTB metric. The effect of averaging is then studied in terms of an effective backreaction fluid. It is shown that, contrary to the claims in the literature, the backreaction fluid behaves like a dark matter component, instead of dark energy, having a
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Gao, Chang Jun, and Shuang Nan Zhang. "Higher dimensional Reissner-Nordström-FRW metric." General Relativity and Gravitation 38, no. 1 (2006): 23–32. http://dx.doi.org/10.1007/s10714-005-0207-8.

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Carvalho, A. M. de M., and Claudio Furtado. "Holonomy transformation in the FRW metric." General Relativity and Gravitation 39, no. 9 (2007): 1311–22. http://dx.doi.org/10.1007/s10714-007-0443-1.

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BOWDITCH, BRIAN H. "Median and injective metric spaces." Mathematical Proceedings of the Cambridge Philosophical Society 168, no. 1 (2018): 43–55. http://dx.doi.org/10.1017/s0305004118000555.

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AbstractWe describe a construction which associates to any median metric space a pseudometric satisfying the binary intersection property for closed balls. Under certain conditions, this implies that the resulting space is, in fact, an injective metric space, bilipschitz equivalent to the original metric. In the course of doing this, we derive a few other facts about median metrics, and the geometry of CAT(0) cube complexes. One motivation for the study of such metrics is that they arise as asymptotic cones of certain naturally occurring spaces.
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Torres-Jr, Pedro Rodrigues, and Eduardo Parente Ribeiro. "Packet Reordering Metrics to Enable Performance Comparison in IP-Networks." Journal of Computer Networks and Communications 2020 (May 30, 2020): 1–8. http://dx.doi.org/10.1155/2020/8465191.

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Despite the existence of several metrics to perform measurements on out-of-order packets, few works have used these metrics for comparative purposes. A potential reason for this is that the use of these simple singleton metrics makes it difficult to analyze all the effects of packet reordering. On the other hand, more complete metrics are represented in a vectorial manner, making comparative analysis challenging. In this paper, we present a scenario for testing and describe a methodology for conducting experiments to compare network paths with respect to unordered packets. The results of sever
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Fuster-Parra, Pilar, Javier Martín, Jordi Recasens, and Óscar Valero. "T-Equivalences: The Metric Behavior Revisited." Mathematics 8, no. 4 (2020): 495. http://dx.doi.org/10.3390/math8040495.

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Since the notion of T-equivalence, where T is a t-norm, was introduced as a fuzzy generalization of the notion of crisp equivalence relation, many researchers have worked in the study of the metric behavior of such fuzzy relations. Concretely, a few techniques to induce metrics from T-equivalences, and vice versa, have been developed. In several fields of computer science and artificial intelligence, a generalization of pseudo-metric, known as partial pseudo-metrics, have shown to be useful. Recently, Bukatin, Kopperman and Matthews have stated that the notion of partial pseudo-metric and a ty
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Lehuta, Sigrid, Stéphanie Mahévas, Pascal Le Floc’h, and Pierre Petitgas. "A simulation-based approach to assess sensitivity and robustness of fisheries management indicators for the pelagic fishery in the Bay of Biscay." Canadian Journal of Fisheries and Aquatic Sciences 70, no. 12 (2013): 1741–56. http://dx.doi.org/10.1139/cjfas-2013-0066.

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Indicators are widely promoted as means to monitor ecosystem status or to evaluate fisheries management performance. “Which indicators are most relevant as decision-support tools in fisheries management?” still remains a topical question. Indicators should be metrics related to fish populations and fleets and should be sensitive to management strategies. However, given the complexity of the processes involved, it is often difficult to unequivocally interpret variations in metrics. A simulation approach was used to study metric properties and to identify robust and relevant fishery indicators.
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Ali, Sarfraz, Sabir Iqbal, Khuram Ali Khan, and Hamid Reza Moradi. "Amended FRW Metric and Rényi Dark Energy Model." Advances in High Energy Physics 2021 (June 15, 2021): 1–9. http://dx.doi.org/10.1155/2021/9704909.

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This article is devoted to exploring the Rényi holographic dark energy model in the theory of Chern-Simons modified gravity. We studied the deceleration parameter, equation of state, and cosmological plane considering the Amended FRW modal. Modified field equations of -gravity theory gave two independent solutions. In the first case, this model provided the transitional change from deceleration to acceleration compatible with collected observational data. However, it supported a decelerating phase of expansion only in the second case. It was noted that the Equation of State advocated the domin
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Dissertations / Theses on the topic "Metrica frw"

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Di, Gennaro Sofia. "Modelli cosmologici di Friedmann-Robertson-Walker." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14518/.

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In questa trattazione si analizzano i principi base da cui si deriva la teoria della cosmologia standard, basata sul modello di Friedmann-Robertson-Walker. Si comincia con l’esposizione del principio cosmologico, che stabilisce l’omogeneità e isotropia dell’Universo alle grandi scale e del postulato di Weyl. Da essi si ricava poi la metrica di Friedmann-Robertson-Walker, che permette di definire una struttura causale in un Universo in espansione. Dalla metrica e dalle equazioni di campo di Einstein si ottengono poi le equazioni di Friedmann, le quali a loro volta possono essere integrat
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Piolanti, Simone. "Il formalismo ADM per la metrica FLRW." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Il tema centrale di questo elaborato è la cosmologia, affrontata in ambito di relatività generale applicando il formalismo ADM al modello FLRW. Il problema consiste nella risoluzione delle equazioni di Einstein in presenza di materia. Sfruttando quindi il formalismo ADM sono innanzitutto definite le formulazioni lagrangiana ed hamiltoniana di una teoria in ambito di relatività generale. In particolare sono descritte tali formulazioni per le equazioni di Einstein. Segue come applicazione l'esempio della particella libera relativistica interpretata come teoria di campo in una dimensione. È infin
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Sebastianutti, Marco. "Geodesic motion and Raychaudhuri equations." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18755/.

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The work presented in this thesis is devoted to the study of geodesic motion in the context of General Relativity. The motion of a single test particle is governed by the geodesic equations of the given space-time, nevertheless one can be interested in the collective behavior of a family (congruence) of test particles, whose dynamics is controlled by the Raychaudhuri equations. In this thesis, both the aspects have been considered, with great interest in the latter issue. Geometric quantities appear in these evolution equations, therefore, it goes without saying that the features of a given sp
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Yang, Kai-Wei, and 楊凱崴. "Novel Metric-based Meta Learning Algorithms for Few-shot Learning." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2ac37n.

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碩士<br>國立交通大學<br>工業工程與管理系所<br>108<br>Deep learning technology has been proven to significantly improve prediction accuracy in the areas of text mining, computer vision, and signal processing. Compared to traditional machine learning methods, deep learning integrates feature learning and model prediction into the same network architecture, making it possible to learn abstract feature representations directly from data. Deep learning requires a large amount of training data to train the model, since deep learning relies on deep neural networks to learn feature representation, and the number of mo
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Liou, You-Sin, and 劉祐欣. "Query-Adapted Metric Learning and Discriminative Feature Selection for Few-Shot Recognition." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pext4u.

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碩士<br>國立清華大學<br>資訊工程學系所<br>107<br>Few-shot recognition aims to recognize novel classes with only a few training samples and alleviates the cost of data collection and labeling. In this thesis, we propose a deep metric and integrate existing metric learning approaches to compare the dissimilarity between each data pair. In addition, we propose a feature selection method by learning a threshold to select discriminative features. Considering that objects vary in scales, we propose a multi-scale feature extractor and include the extracted features in the learned metric to ensure the multi-scale pr
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Kong, ByoungDoo. "Metric Learning via Linear Embeddings for Human Motion Recognition." 2020. https://scholarworks.umass.edu/masters_theses_2/973.

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We consider the application of Few-Shot Learning (FSL) and dimensionality reduction to the problem of human motion recognition (HMR). The structure of human motion has unique characteristics such as its dynamic and high-dimensional nature. Recent research on human motion recognition uses deep neural networks with multiple layers. Most importantly, large datasets will need to be collected to use such networks to analyze human motion. This process is both time-consuming and expensive since a large motion capture database must be collected and labeled. Despite significant progress having been mad
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Books on the topic "Metrica frw"

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Pietropaoli, Antonio. Fra retorica e metrica: Saggi sulla poesia italiana contemporanea. Guida, 2014.

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Moro, Costantino. La varietà e la norma: I frammenti giambico-trocaici di Lucilio fra versificazione drammatica e alessandrinismo. Imprimitur, 1995.

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Fra metro e parola: Considerazioni sulla poesia drammatica greca. S.A.R.G.O.N. editrice e libreria, 2013.

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Maggiore, Michele. Helicity decomposition of metric perturbations. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198570899.003.0009.

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Decomposition of the perturbations over FRW into scalar, vector and tensor perturbations. Physical and unphysical degrees of freedom. Gauge-invariant metric perturbations, Bardeen variables. Gauge-invariant perturbations of the energy-momentum tensor
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Marinčič, Marko. Farming for the Few. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198810810.003.0012.

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The point of departure for this chapter is a little known work by Jožef Šubic, whose translation of Virgil’s Georgics, published in 1863, although largely unknown outside scholarly circles, nonetheless offers an important background to the Slovenian school of translation of Greek and Latin texts and of classics in general. Marinčič argues that this text, written in a hybrid metrical pattern, is by no means a literary masterpiece, but it is a groundbreaking work reflecting the contemporary debates concerning the use of classical metrical forms and implicitly opposing the Romantic ideology of ag
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Sykes, Joseph. Occasional Poems: Prefixed by a Few Words On Metrical Composition, by J.S. Nabu Press, 2010.

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Saha, Prasenjit, and Paul A. Taylor. The Expanding Universe. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198816461.003.0008.

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This chapter covers the now generally accepted ‘concordance model’ of the Universe, along with a few other historical models that were leading candidates previously. The theoretical underpinnings of the Cosmological Principle and its observational evidence are presented. The formalism of the Friedmann equation and the Robertson–Walker metric are introduced (without derivation), and the key concepts of lookback time and comoving distance are explained. The different mass–energy constituents in the concordance cosmology (including curvature, dark matter, and dark energy) are also described, alon
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Vig, Sanjana, and Steven Boggs. Financial Analysis and Competitive Strategies for NORA. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190495756.003.0007.

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The scientific and technical principles that form the basis of anesthesia practice are transferrable to any location where patients require monitoring, analgesia, and hypnosis. Most growth seen in anesthesia services in the past decade has occurred in non–operating room anesthesia locations. Anesthesiologists are critical for the safe and efficient functioning of these locations. However, with the ever-increasing pressure to reduce total health care delivery costs, anesthesiologists need to understand some of the financial metrics that will be used to measure their contribution to these locati
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Book chapters on the topic "Metrica frw"

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Boblest, Sebastian, Thomas Müller, and Günter Wunner. "Feldgleichungen für die FLRW-Metrik." In Spezielle und allgemeine Relativitätstheorie. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47767-0_25.

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Wang, Wei, Zhijie Wen, Liyan Ma, and Shihui Ying. "Multi-metric Joint Discrimination Network for Few-Shot Classification." In Pattern Recognition and Computer Vision. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60636-7_23.

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Zhou, Meng, Yaoyi Li, and Hongtao Lu. "Ensemble-Based Deep Metric Learning for Few-Shot Learning." In Artificial Neural Networks and Machine Learning – ICANN 2020. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61609-0_32.

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Zhang, Jiatao, Tianxing Wu, and Guilin Qi. "Gaussian Metric Learning for Few-Shot Uncertain Knowledge Graph Completion." In Database Systems for Advanced Applications. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73194-6_18.

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Sallin, Marc, Martin Kropp, Craig Anslow, James W. Quilty, and Andreas Meier. "Measuring Software Delivery Performance Using the Four Key Metrics of DevOps." In Lecture Notes in Business Information Processing. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78098-2_7.

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Abstract The Four Key Metrics of DevOps have become very popular for measuring IT-performance and DevOps adoption. However, the measurement of the four metrics deployment frequency, lead time for change, time to restore service and change failure rate is often done manually and through surveys - with only few data points. In this work we evaluated how the Four Key Metrics can be measured automatically and developed a prototype for the automatic measurement of the Four Key Metrics. We then evaluated if the measurement is valuable for practitioners in a company. The analysis shows that the chosen measurement approach is both suitable and the results valuable for the team with respect to measuring and improving the software delivery performance.
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Gu, Qinghua, Zhengding Luo, Wanyu Zhao, and Yuesheng Zhu. "MM-Net: Learning Adaptive Meta-metric for Few-Shot Biometric Recognition." In MultiMedia Modeling. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67832-6_22.

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Emer, Carine, and Sérgio Timóteo. "How a network approach has advanced the field of plant invasion ecology." In Plant invasions: the role of biotic interactions. CABI, 2020. http://dx.doi.org/10.1079/9781789242171.0324.

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Abstract Every organism on Earth, whether in natural or anthropogenic environments, is connected to a complex web of life, the famous 'entangled bank' coined by Darwin in 1859. Non-native species can integrate into local 'banks' by establishing novel associations with the resident species. In that context, network ecology has been an important tool to study the interactions of non-native species and the effects on recipient communities due to its ability to simultaneously investigate the assembly and disassembly of species interactions as well as their functional roles. Its visually appealing tools and relatively simple metrics gained momentum among scientists and are increasingly applied in different areas of ecology, from the more theoretical grounds to applied research on restoration and conservation. A network approach helps us to understand how plant invasions may or may not form novel species associations, how they change the structure of invaded communities, the outcomes for ecosystem functionality and, ultimately, the implications for the conservation of ecological interactions. Networks have been widely used on pollination studies, especially from temperate zones, unveiling their nested patterns and the mechanisms by which non-native plants integrate into local communities. Yet, very few papers have used network approaches to assess plant invasion effects in other systems such as plant-herbivore, plant-pathogen or seed-dispersal processes. Here we describe how joining network ecology with plant invasion biology started and how it has developed over the last few decades. We show the extent of its contribution, despite contradictory results and biases, to a better understanding of the role of non-native plant species in shaping community structure. Finally, we explore how it can be further improved to answer emerging questions.
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Kaiser-Bunbury, Christopher N., and Benno I. Simmons. "Restoration of pollination interactions in communities invaded by non-native plants." In Plant invasions: the role of biotic interactions. CABI, 2020. http://dx.doi.org/10.1079/9781789242171.0377.

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Abstract Invasive plant species degrade and homogenize ecosystems worldwide, thereby altering ecosystem processes and function. To mitigate and reverse the impact of invasive plants on pollination, a key ecosystem function, conservation scientists and practitioners restore ecological communities and study the impact of such management interventions on plant-pollinator communities. Here, we describe opportunities and challenges associated with restoring pollination interactions as part of a holistic ecosystem-based restoration approach. We introduce a few general concepts in restoration ecology, and outline best planning and evaluation practices of restoring pollination interactions on the community level. Planning involves the selection of suitable plant species to support diverse pollinator communities, which includes considerations of the benefits and disadvantages of using native vs exotic, and bridge and framework plant species for restoration. We emphasize the central role of scientific- and community-level approaches for the planning phase of pollination restoration. For evaluation purposes, we argue that appropriate network indicators have the advantage of detecting changes in species behaviour with consequences for ecosystem processes and functions before these changes show up in altered species communities. Suitable network metrics may include interaction diversity and evenness, and network measures that describe the distribution of species, such as network and species-level specialization, modularity and motifs. Finally, we discuss the usefulness of the network approach in evaluating the benefits of restoration interventions for pollination interactions, and propose that applied network ecologists take a central role in transferring theory into practice.
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Carmeli, Moshe. "The Friedmann Universe: FRW Metric." In Relativity. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812813770_0011.

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"Developing a few new metrics for RFID applications." In RFID Metrics. CRC Press, 2006. http://dx.doi.org/10.1201/b15875-6.

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Conference papers on the topic "Metrica frw"

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Ayazi, Philip, Gabriel Monreal, Hassan Bleibel, Frank Zamora, and Larry Watters. "Stability of Chemically Degraded Friction Reducers and Their Relationship to Regain Conductivity." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206308-ms.

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Abstract Previously, it was shown that zeta potential could be used as a metric to determine friction reducer (FR) performance. Specifically, the extent of and how quickly the FR reaches peak friction reduction in source water. A correlation postulated from the previous work is zeta potentials relationship to an FR's stability during mechanical or chemical degradation. In other words, can zeta potential be used as a metric to determine the extent of polymer breaking and can this relationship be translated to regained conductivity? This paper describes a laboratory study of zeta potential measu
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Mytkowicz, Todd, Peter F. Sweeney, Matthias Hauswirth, and Amer Diwan. "Time Interpolation: So Many Metrics, So Few Registers." In 40th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO 2007). IEEE, 2007. http://dx.doi.org/10.1109/micro.2007.27.

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Mytkowicz, Todd, Peter F. Sweeney, Matthias Hauswirth, and Amer Diwan. "Time Interpolation: So Many Metrics, So Few Registers." In 40th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO 2007). IEEE, 2007. http://dx.doi.org/10.1109/micro.2007.4408263.

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Babuska, Vit, Delano Carter, Steven Lane, and Seth Lacy. "FRF Correlation and Error Metrics for Plant Identification." In 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-2012.

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Hwann-Tzong Chen, Tyng-Luh Liu, and Chiou-Shann Fuh. "Learning effective image metrics from few pairwise examples." In Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1. IEEE, 2005. http://dx.doi.org/10.1109/iccv.2005.136.

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Yu, Mo, Xiaoxiao Guo, Jinfeng Yi, et al. "Diverse Few-Shot Text Classification with Multiple Metrics." In Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long Papers). Association for Computational Linguistics, 2018. http://dx.doi.org/10.18653/v1/n18-1109.

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Li, Wenbin, Lei Wang, Jing Huo, Yinghuan Shi, Yang Gao, and Jiebo Luo. "Asymmetric Distribution Measure for Few-shot Learning." In Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/409.

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The core idea of metric-based few-shot image classification is to directly measure the relations between query images and support classes to learn transferable feature embeddings. Previous work mainly focuses on image-level feature representations, which actually cannot effectively estimate a class's distribution due to the scarcity of samples. Some recent work shows that local descriptor based representations can achieve richer representations than image-level based representations. However, such works are still based on a less effective instance-level metric, especially a symmetric metric, t
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Simon Raj, F., and A. George. "On the metric dimension of few network sheets." In 2015 International Conference on Robotics, Automation, Control and Embedded Systems (RACE). IEEE, 2015. http://dx.doi.org/10.1109/race.2015.7097301.

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Wang, Zeyuan, Yifan Zhao, Jia Li, and Yonghong Tian. "Cooperative Bi-path Metric for Few-shot Learning." In MM '20: The 28th ACM International Conference on Multimedia. ACM, 2020. http://dx.doi.org/10.1145/3394171.3413946.

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Aoki, Haruka, Koki Tsubota, Hikaru Ikuta, and Kiyoharu Aizawa. "Few-Shot Font Generation with Deep Metric Learning." In 2020 25th International Conference on Pattern Recognition (ICPR). IEEE, 2021. http://dx.doi.org/10.1109/icpr48806.2021.9412254.

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Reports on the topic "Metrica frw"

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Takeuchi, Tsukasa. On the Construction of Recursion Operators for the Kerr-Newman and FLRW Metrics. Jgsp, 2015. http://dx.doi.org/10.7546/jgsp-37-2015-85-96.

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García-Mantilla, Daniel. PLAC Network Best Practices Series: Target-Income Design of Incentives, Benchmark Portfolios and Performance Metrics for Pension Funds. Inter-American Development Bank, 2021. http://dx.doi.org/10.18235/0003599.

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In defined contribution systems, at the end of the accumulation phase the assets in the retirement account are exchanged for a pension. The conversion rate from assets to retirement income (which depends on the level of interest rates) is very volatile, and its variations constitute the main investment risk facing pension fund affiliates. In this sense, performance metrics, management fees and benchmark portfolios that focus on assets (and asset returns) and ignore the variations in the conversion rate, embed several problems: i. they send wrong signals to regulators, fund managers and workers
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