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Littérature scientifique sur le sujet « N-centre problem »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "N-centre problem"

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Barutello, Vivina, Gian Marco Canneori, and Susanna Terracini. "Symbolic Dynamics for the Anisotropic N-Centre Problem at Negative Energies." Archive for Rational Mechanics and Analysis 242, no. 3 (2021): 1749–834. http://dx.doi.org/10.1007/s00205-021-01714-8.

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AbstractThe planar N-centre problem describes the motion of a particle moving in the plane under the action of the force fields of N fixed attractive centres: $$\begin{aligned} \ddot{x}(t)=\sum _{j=1}^N\nabla V_j(x(t)-c_j). \end{aligned}$$ x ¨ ( t ) = ∑ j = 1 N ∇ V j ( x ( t ) - c j ) . In this paper we prove symbolic dynamics at slightly negative energy for an N-centre problem where the potentials $$V_j$$ V j are positive, anisotropic and homogeneous of degree $$-\alpha _j$$ - α j : $$\begin{aligned} V_j(x)=|x|^{-\alpha _j}V_j\left( \frac{x}{|x|}\right) . \end{aligned}$$ V j ( x ) = | x | - α
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Bolotin, S. V., and V. V. Kozlov. "Topological approach to the generalized $ n$-centre problem." Russian Mathematical Surveys 72, no. 3 (2017): 451–78. http://dx.doi.org/10.1070/rm9779.

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Knauf, Andreas, and Iskander A. Taimanov. "On the integrability of the n-centre problem." Mathematische Annalen 331, no. 3 (2005): 631–49. http://dx.doi.org/10.1007/s00208-004-0598-y.

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Boscaggin, Alberto, Walter Dambrosio, and Susanna Terracini. "Scattering Parabolic Solutions for the Spatial N-Centre Problem." Archive for Rational Mechanics and Analysis 223, no. 3 (2016): 1269–306. http://dx.doi.org/10.1007/s00205-016-1057-0.

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Juodraitis, Adolfas, and Odeta Šapelytė. "Paradoxicality of the activity of institutional education institutions: principles and opportunities." Social welfare : interdisciplinary approach 4, no. 1 (2014): 31–44. http://dx.doi.org/10.15388/sw.2014.28247.

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The article presents the problem of paradoxicality of the activity of juvenile institutional education (i.e., socialisation centres operating in Lithuania). Several important variables have not been considered in the interaction of the activities of the socialisation centre, simultaneously of pedagogical and other staff and learners, their families/foster parents, and this resulted in inconsistency of the implementation of the complex resocialisation process. The article calls for the scientific discussion, actualising essential principles of resocialisation observed in socialisation centres,
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Soave, Nicola, and Susanna Terracini. "Symbolic dynamics for the $N$-centre problem at negative energies." Discrete & Continuous Dynamical Systems - A 32, no. 9 (2012): 3245–301. http://dx.doi.org/10.3934/dcds.2012.32.3245.

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Knauf, Andreas. "The n -centre problem of celestial mechanics for large energies." Journal of the European Mathematical Society 4, no. 1 (2002): 1–114. http://dx.doi.org/10.1007/s100970100037.

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Boscaggin, Alberto, Walter Dambrosio, and Duccio Papini. "Parabolic solutions for the planar N-centre problem: multiplicity and scattering." Annali di Matematica Pura ed Applicata (1923 -) 197, no. 3 (2017): 869–82. http://dx.doi.org/10.1007/s10231-017-0707-7.

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Soave, Nicola. "Symbolic dynamics: from the N-centre to the (N + 1)-body problem, a preliminary study." Nonlinear Differential Equations and Applications NoDEA 21, no. 3 (2013): 371–413. http://dx.doi.org/10.1007/s00030-013-0251-0.

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Soave, Nicola, and Susanna Terracini. "Addendum to: Symbolic dynamics for the $N$-centre problem at negative energies." Discrete and Continuous Dynamical Systems 33, no. 8 (2013): 3825–29. http://dx.doi.org/10.3934/dcds.2013.33.3825.

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Thèses sur le sujet "N-centre problem"

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Southall, John. "Variational methods and periodic solutions of N-body and N-centre problems." Thesis, University of Surrey, 2006. http://epubs.surrey.ac.uk/843280/.

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In this thesis we study periodic solutions of several N-body and N-centre systems with different potentials from a variational viewpoint. The underlying focus is on understanding the structure of various action functionals, and the relationship between this and the system's periodic orbits and their properties. In particular we: investigate the integrable central force problems with potentials Valpha(x) = - 1/|x|alpha for 1&le; alpha &le; 2. We show that for 1 < alpha < 2 there are only finitely many homotopy classes that do not contain a prime-period, but that this number diverges as alpha &r
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SOAVE, NICOLA. "Variational and geometric methods for nonlinear differential equations." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/49889.

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This thesis is devoted to the study of several problems arising in the field of nonlinear analysis. The work is divided in two parts: the first one concerns existence of oscillating solutions, in a suitable sense, for some nonlinear ODEs and PDEs, while the second one regards the study of qualitative properties, such as monotonicity and symmetry, for solutions to some elliptic problems in unbounded domains. Although the topics faced in this work can appear far away one from the other, the techniques employed in different chapters share several common features. In the firts part, the variationa
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Fernandes, Antonio Carlos. "Sobre configurações centrais do problema de n-corpos. Configurações centrais planares, espaciais e empilhadas." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/45/45132/tde-04062012-103241/.

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No presente trabalho apresentaremos alguns aspectos do problema Newtoniano de n Corpos. Estudaremos o caso de dois corpos, que tem solução direta, embora não seja possível obter todas as variáveis como função do tempo. No caso n maior ou igual a 3 mostraremos que não existe método para integrar este problema via quadraturas. Podemos tirar apenas algumas informações sobre o caso geral, como a Identidade de Lagrange-Jacobi, o Teorema de Sundman-Weierstrass entre outros. Veremos alguns casos de soluções particulares, que serão chamadas de soluções homográficas. Nestas soluções a forma geométrica
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Xie, Zhifu. "On the N-body Problem." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1444.pdf.

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Nascimento, Neto Moacyr Silva do. "Um esquema central em volumes finitos de alta resolu ¸c˜ao para a solu¸c˜ao num´erica de problemas hiperb´olicos bidimensionais em malhas n˜ao-estruturais." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/13197.

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Submitted by Victor Hugo Albuquerque Rizzo (victor.rizzo@ufpe.br) on 2015-04-15T14:07:58Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) DISSERTAÇÃO_Moacyr Silva do Nascimento Neto.pdf: 3251280 bytes, checksum: 77263cea23a86d6209263224f23f509f (MD5)<br>Made available in DSpace on 2015-04-15T14:07:58Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) DISSERTAÇÃO_Moacyr Silva do Nascimento Neto.pdf: 3251280 bytes, checksum: 77263cea23a86d6209263224f23f509f (MD5) Previous issue date: 2013<br>Um e
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Krapf, Markus [Verfasser]. "Die Entkommensrate des n-Zentrenproblems = The escape rate of the n-centre problem / vorgelegt von Markus Krapf." 2007. http://d-nb.info/985130431/34.

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Zhu, Shuqiang. "Central configurations of the curved N-body problem." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8334.

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We extend the concept of central configurations to the N-body problem in spaces of nonzero constant curvature. Based on the work of Florin Diacu on relative equilib- ria of the curved N-body problem and the work of Smale on general relative equilibria, we find a natural way to define the concept of central configurations with the effective potentials. We characterize the ordinary central configurations as constrained critical points of the cotangent potential, which helps us to establish the existence of ordi- nary central configurations for any given masses. After these fundamental results, w
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Paraschiv, Victor. "Homographic solutions of the quasihomogeneous N-body problem." Thesis, 2011. http://hdl.handle.net/1828/3421.

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We consider the N-body problem given by quasihomogeneous force functions of the form (C_1)/r^a + (C_2)/r^b (C_1, C_2, a, b constants and a, b positive with a less than or equal to b) and address the fundamentals of homographic solutions. Generalizing techniques of the classical N-body problem, we prove necessary and sufficient conditions for a homographic solution to be either homothetic, or relative equilibrium. We further prove an analogue of the Lagrange-Pizzetti theorem based on our techniques. We also study the central configurations for quasihomogeneous force functions and settle the cl
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Hénot, Olivier. "Configurations centrales en toile d'araignée." Thèse, 2018. http://hdl.handle.net/1866/21618.

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Kowalczyk, Marta. "Zastosowanie metod niezmienniczej analizy nieliniowej do badania istnienia i bifurkacji centralnych konfiguracji pewnych zagadnień mechaniki nieba." Doctoral thesis, 2017. http://repozytorium.umk.pl/handle/item/5201.

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We study topological bifurcations of critical orbits of equivariant gradient equations. We give necessary and sufficient conditions for the existence of global bifurcations of solutions of these equations. Moreover, we apply these abstract results to the study of bifurcations of new families of planar and spatial central configurations of the N-body problem. It is worth pointing out that the shapes of the bifurcating families are less symmetrical than the shapes of the considered families of planar and spatial central configurations.
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Livres sur le sujet "N-centre problem"

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F, Combes, Athanassoula E, and Centre national de la recherche scientifique (France), eds. N-body problems and gravitational dynamics: Proceedings of a meeting held at Centre Paul Langevin-CNRS, Aussois, Haute Maurienne, France, 21-25 Mars 1993. Observatoire de Paris, 1993.

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(Editor), Cesare Davini, and Erasmo Viola (Editor), eds. Problems in Structural Identification and Diagnostics: General Aspects and Applications: MURST Project n. MM08342598 - COFIN 2000 (CISM International Centre for Mechanical Sciences). Springer, 2004.

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ELIV 2019. VDI Verlag, 2019. http://dx.doi.org/10.51202/9783181023570.

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Der Bericht ist ausschließlich als PDF-Dokument erschienen! Content Foreword 1 ADAS Seeing With Sound – Next-level 3D ultrasonic sensors based on echolocation 5 N. Knappstein, Toposens, Munich Ensuring the reliability, availability and safety of fully automated and autonomous transport systems through modern system architectures 11 J. Heinrich, A. Braasch, Institut für Qualitäts- und Zuverlässigkeitsmanagement GmbH, Wuppertal; F. Plinke, Institut für Qualitäts- und Zuverlässigkeitsmanagement GmbH, Hamburg ADAS/AD Systems: Efficient Testing &amp; Validation – From data acquisition to data analy
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Balyshev, Marat. Astronomical research in Kharkiv at the end of the 19th century – the first half of the 20th century. “Naukova Dumka”, 2022. http://dx.doi.org/10.15407/978-966-00-1863-1.

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The main milestones of the formation and development of astronomical science in Kharkiv during 1883–1945 are reconstructed on the example of the activities of the astronomical observatory of Kharkiv University. During this period, the outstanding worldview science in Kharkiv has achieved significant success: the works of Kharkiv astronomers have received world recognition; a well-known scientific planetary school has been established at the Observatory; the scientific community highly appreciated the research on the physics and chemistry of the Moon, the giant and small planets of the Solar Sy
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Johansen, Bruce, and Adebowale Akande, eds. Nationalism: Past as Prologue. Nova Science Publishers, Inc., 2021. http://dx.doi.org/10.52305/aief3847.

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Nationalism: Past as Prologue began as a single volume being compiled by Ad Akande, a scholar from South Africa, who proposed it to me as co-author about two years ago. The original idea was to examine how the damaging roots of nationalism have been corroding political systems around the world, and creating dangerous obstacles for necessary international cooperation. Since I (Bruce E. Johansen) has written profusely about climate change (global warming, a.k.a. infrared forcing), I suggested a concerted effort in that direction. This is a worldwide existential threat that affects every living t
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Chapitres de livres sur le sujet "N-centre problem"

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Morabito, Antonio, Carmelo Musarella, Giuseppe Caruso, and Giovanni Spampinato. "A methodological approach to assessing the conservation status of coastal habitats: the case study of Calabria (Southern Italy)." In Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques. Firenze University Press, 2024. https://doi.org/10.36253/979-12-215-0556-6.23.

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The Mediterranean coasts are threatened by human activities that cause changes and alterations in the vegetation. This study aims to assess the impact of urbanisation on the conservation status of EEC Directive 43/92 habitats. We used all polygons in the range 0-200 m above sea level. Using QGIS, we calculated the distance in metres between the vegetation relevés of the habitats and the centre of the polygons coded as urban. A total of 73 vegetation relevés were carried out, which allowed us to recognise 13 revealing habitats. The total diversity of plant species per habitat was measured with
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Xie, Zhifu. "Central Configurations, Super Central Configurations, and Beyond in the n-Body Problem." In Springer Proceedings in Mathematics & Statistics. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4559-3_1.

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Krafft, Andreas M., JohnBosco Chika Chukwuorji, Rajneesh Choubisa, et al. "Mastering the COVID-19 Pandemic Crisis: From Anxiety to Hope." In Hope across cultures. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-24412-4_9.

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AbstractThis chapter presents selected results of the Hope Barometer survey during the pandemic years of 2020 and 2021. Against the background of the intense feelings of stress and anxiety in these times of crisis, we first review current theories on psychological stress and coping, present results of our empirical studies during the pandemic and then focus on the role and importance of hope in relation to positive coping styles, well-being, and stress-related personal growth. A central aim of our research is to investigate the role of culture in the perception of stress and hope (as the count
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Sultmann, William, Janeen Lamb, Peter Ivers, and Mark Craig. "What Matters to Senior Secondary Students in RE: An Australian Case Study That Compares an Innovative Curriculum with Traditional Approaches." In Intersections of Religion, Education, and a Sustainable World. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-81809-7_11.

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Abstract Students’ (N = 353) in the senior secondary school rated the significance of Topics, Pedagogies and Outcomes for Religious Education (RE) courses: two with an academic focus, combined and named Other RE; and one, an innovative curriculum, using a reconceptualist approach, named Religion Meaning and Life (RML). The topics of Ethics and Other World Religions were preferenced by all RE students independent of the course studied. However, students studying RML held significant and more positive perceptions for topics of Jesus and Other World Religions. All students affirmed pedagogies bas
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Lumet Charles, Bouveret Sylvain, and Lemaître Michel. "Fair Division of Indivisible Goods under Risk." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2012. https://doi.org/10.3233/978-1-61499-098-7-564.

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We consider the problem of fairly allocating a set of m indivisible objects to n agents having additive preferences over them. In this paper we propose an extension of this classical problem, where each object can possibly be in bad condition (e.g broken), in which case its actual value is zero. We assume that the central authority in charge of allocating the objects does not know beforehand the objects conditions, but only has probabilistic information. The aim of this work is to propose a formal model of this problem, to adapt some classical fairness criteria to this extended setting, and to
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Krishnamurti, Bhadriraju, and Murray B. Emeneau. "A Problem of Reconstruction in Gondi: Interaction between Phonological and Morphological Processes." In Comparative Dravidian Linguistics. Oxford University PressOxford, 2001. http://dx.doi.org/10.1093/oso/9780198241225.003.0015.

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Abstract In the group of languages called South-Central Dravidian (i.e. Telugu,Gondi, Konda, Kui, Kuvi, Pengo, and Manda) as well as in the Central Dravidianlanguages, we find systematic reflexes for the final sequences of the reconstructedsingular forms *-nt(u) and *-n (for nominative and oblique) which apparently represent the retention of the Proto-Dravidian distinction between nominative andoblique case forms.
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Tam, James P., and Y. A. Lu. "Chemoselective and orthogonal ligation techniques." In Fmoc Solid Phase Peptide Synthesis. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780199637256.003.0015.

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Peptide synthesis through segment ligation of unprotected peptides (total synthesis) and peptides to proteins (semi-synthesis) in aqueous solution is appealingly simple and efficient because protection and activation steps are not required. In addition, this method offers the potential to access a diverse group of macromolecules such as circular proteins, branched peptides, and protein conjugates which are difficult to obtain through conventional approaches using protecting group strategies. Furthermore, the use of unprotected peptide segments overcomes the problem of solubility encountered in
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Lakshmivarahan, S., and Sudarshan K. Dhall. "The Prefix Problem And Its Applications." In Parallel Computing Using the Prefix Problem. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195088496.003.0006.

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With the emergence of parallel computing, the notion of prefix computation has gained considerable attention in the literature and it plays a central role in parallel algorithm design. This introductory chapter begins with the definition of the prefix problem. The ubiquitous nature of this problem is then illustrated using a host of examples drawn from a variety of application areas. Readers unfamiliar with a particular application area may choose to consult the appropriate references given in Section 1.4, Notes and References. After gaining sufficient familiarity with the remainder of this bo
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Quenouille, M. H. "Notes on Bias in Estimation." In Biometrika. Oxford University PressOxford, 2001. http://dx.doi.org/10.1093/oso/9780198509936.003.0013.

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Abstract 1. One of the commonest problems in statistics is, given a series of observations x 1, x 2, … , x n, to find a function of these, tn(x 1, x 2, … , x n), which should provide an estimate of an unknown parameter θ.The desirable properties of estimation procedures have been discussed fully elsewhere. They are:(a) That the estimator should be efficient according to some .definition of efficiency previously arranged. Most commonly, the reciprocal of the variance of the estimates is taken as a measure of its efficiency, as this is most useful where central limit theory may be relevant.
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Merlevède, Florence, Magda Peligrad, and Sergey Utev. "Reversible Markov Chains." In Functional Gaussian Approximation for Dependent Structures. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198826941.003.0014.

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This chapter is dedicated to the Gaussian approximation of a reversible Markov chain. Regarding this problem, the coefficients of dependence for reversible Markov chains are actually the covariances between the variables. We present here the traditional form of the martingale approximation including forward and backward martingale approximations. Special attention is given to maximal inequalities which are building blocks for the functional limit theorems. When the covariances are summable we present the functional central limit theorem under the standard normalization √n. When the variance of
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Actes de conférences sur le sujet "N-centre problem"

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Kissova, Olga, and Jiri Tendler. "EMPOWERING UNIVERSITY LEARNERS: UNLEASHING THE POTENTIAL OF ESP THROUGH THE 7CS FRAMEWORK." In 11th SWS International Scientific Conferences on SOCIAL SCIENCES - ISCSS 2024. SGEM WORLD SCIENCE, 2024. https://doi.org/10.35603/sws.iscss.2024/s08/53.

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The article explores how the 7Cs framework, a student-centric approach and a new learning paradigm, can foster language proficiency, cultural understanding, and interdisciplinary collaboration in professional English learning among university students in English for Specific Purposes (ESP). In this study, the �JobLab approach� was used to simulate real-world tasks tailored to the specific needs of graduates, meeting the demands of the 21st century. The approach�s seven key elements, content, context, communication, collaboration, creativity, critical thinking, and culture, were seamlessly inte
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Das, Apurba, Ranojit Banerjee, and Amit Karmakar. "Transient Dynamic Analysis of Pretwisted Functionally Graded Conical Shells Subject to Low Velocity Impact: A Finite Element Approach." In ASME 2017 Gas Turbine India Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gtindia2017-4611.

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This paper investigates on the problem of functionally graded (FG) shallow conical shells subjected to low-velocity impact by a solid spherical mass at the centre. Turbomachinery blades with low aspect ratio could be idealized as twisted rotating cantilever FG shallow conical shells. An analytic solution method is developed to solve and predict the impact response in terms of contact force, impactor displacement, initial velocity of impactor, target displacement and indentation of the FG conical shells with different sigmoidal power law exponent. A modified Hertzian contact law considering per
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Garcia-Andrés, Xavier, Jorge Gutiérrez-Gil, Víctor Tomás Andrés, José Martínez-Casas, and Francisco David Denia. "Rolling noise reduction through GA-based wheel shape optimization techniques." In VI ECCOMAS Young Investigators Conference. Editorial Universitat Politècnica de València, 2021. http://dx.doi.org/10.4995/yic2021.2021.12577.

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Railway rolling noise is nowadays a major source of acoustic pollution in urban areas, with nearly up to 12 million people daily affected in Europe by this phenomenon [1]. Hence, the search for ways of decreasing such noise radiation has become a highly active and significant research field. Following this approach, a Genetic Algorithms-based shape optimization of the railway wheel [2] is developed with the aim of minimizing rolling noise. Different approaches are considered to address the problem, such as directly minimizing radiated Sound poWer Level (SWL) or using the maximization of the na
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de Carvalho, Laura, Maria Clara Bizinotto Leal de Lima, Laís Duran Gomes, Rafael Alves de Oliveira, Gustavo Henrique da Silva, and Amanda Oliva Spaziani. "PERFIL DE MORTALIDADE POR CAUSAS EVITÁVEIS ENTRE 2011 E 2020: DOENÇA CARDÍACA E RENAL HIPERTENSIVA." In ANAIS V CONTEC BRASIL 2024. Universidade Brasil, 2024. https://doi.org/10.63021/vcontec.978-6589249313.2024.art154.

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Introdução: As doenças cardiovasculares (DCV) são uma das principais causas de mortalidade no Brasil e no mundo, com a hipertensão arterial como fator de risco relevante. Associada ao envelhecimento, fatores socioeconômicos, etnia e estilo de vida, a hipertensão arterial sistêmica (HAS) é uma doença crônica comum e pode evoluir para a doença renal hipertensiva (DRH), configurando um problema de saúde pública significativo. Objetivo: Analisar o perfil de mortalidade por doenças cardíacas (CID I11), renais (CID I12) e cardíacas e renais hipertensivas (CID I13) no Brasil entre 2011 e 2020, consid
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Kasuga, Willy, and Wadrine Maro. "The Influence of Problem-Based Learning on Students’ Motivation in Learning Biology in Tanzania Secondary Schools." In Proceedings of the 1st International Conference of Education. Dar es Salaam University Press, 2023. http://dx.doi.org/10.37759/ice01.2023.16.

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The aim of this study was to examine the influence of problem-based learning (PBL) on students’ motivation in learning Biology subject in Tanzania secondary schools in terms of the teaching and learning materials (T/L) and assessment activities employed. The study was conducted in Njombe Region employing a quasi-experimental design with the model of a pre-test post-test control group design framed within social constructivism theory. The participants for the study were Form 1E, 2D and 3B (n = 95) students in experimental school and Form 1D, 2C and 3D (n = 126) students in control school who pa
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Tingjian, Zhang. "The Calculation of Contact Deformation for Double Circular-Arc Gears." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0018.

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Abstract The Double Circular-arc gear (W-N gear) transmission is well-known as the high contact strength, good wear resisting property and well distributed wears. As developing of its applications in recent years, the contact deformation of W-N gear become more important. In this paper, under basic assumption, the equations for calculating contact deformation of Double Circular-arc gear tooth were derived by using theory of elasticity of general contact problem between arbitrary elastic bodies in three dimensions. The equations were proved by industrial gear applications (one of the example: t
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Jonsson, Peter, and Victor Lagerkvist. "Lower Bounds and Faster Algorithms for Equality Constraints." 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.2020/247.

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We study the fine-grained complexity of NP-complete, infinite-domain constraint satisfaction problems (CSPs) parameterised by a set of first-order definable relations (with equality). Such CSPs are of central importance since they form a subclass of any infinite-domain CSP parameterised by a set of first-order definable relations. We prove that under the randomised exponential-time hypothesis it is not possible to find c &gt; 1 such that a CSP over an arbitrary finite equality language is solvable in O(c^n) time (n is the number of variables). Stronger lower bounds are possible for infinite eq
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Gupta, Anchit, and Shivaram Kalyanakrishnan. "Improved Strong Worst-case Upper Bounds for MDP Planning." In Twenty-Sixth International Joint Conference on Artificial Intelligence. International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/248.

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The Markov Decision Problem (MDP) plays a central role in AI as an abstraction of sequential decision making. We contribute to the theoretical analysis of MDP PLANNING, which is the problem of computing an optimal policy for a given MDP. Specifically, we furnish improved STRONG WORST-CASE upper bounds on the running time of MDP planning. Strong bounds are those that depend only on the number of states n and the number of actions k in the specified MDP; they have no dependence on affiliated variables such as the discount factor and the number of bits needed to represent the MDP. Worst-case boun
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Vianna, Edgard De Freitas, Graziele Da Costa Martins, João Vitor Vicente Da Silva, and Verônica Regina Gomes Paes Fernandes. "ANÁLISE DE INTERVENÇÕES FARMACÊUTICAS NA PRÁTICA CLÍNICA." In III Congresso Brasileiro de Ciências Farmacêuticas On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/conbracif/28.

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Introdução: As intervenções farmacêuticas são caracterizadas como condutas planejadas, documentadas e realizadas juntamente ao paciente e profissionais de saúde, visando solucionar ou prevenir problemas relacionados a medicamentos na farmacoterapia. A nível de atendimento individualizado ao paciente, cabe ao farmacêutico à obtenção de dados sobre o histórico medicamentoso, avaliação da conduta terapêutica adotada, fornecimento de informações baseadas em evidências à equipe multidisciplinar e acompanhamento dos exames laboratoriais. Objetivo: Este estudo tem o objetivo de descrever as intervenç
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Arnold, J. M. "Stability of Quasi-Periodic Solitary Pulse Trains In Nonintegrable Hamiltonian Wave Systems." In Nonlinear Guided Waves and Their Applications. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/nlgw.1998.nthe.8.

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Considerable interest centres at the present time on the problem of approximating the dynamical motion of solitons by an underlying discrete dynamical system. It has recently been demonstrated that the dynamics of N-solitons of the Nonlinear Schrodinger Equation (NSE) is quite well approximated by Complex Toda Lattice Equations (CTLE) in the limit of large separation of almost identical solitons with arbitrary phases [1-4]. The Lagrangian method proposed in [1, 2] is a direct reduction procedure which does not depend on the integrability of the original equations, and is applicable in principl
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Rapports d'organisations sur le sujet "N-centre problem"

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Sharpe, Pamela, Susan Wright, Sirene May Yin Lim, et al. Early intervention of Malay preschool teachers in promoting children’s mathematics learning. National Institute of Education, Nanyang Technological University, Singapore, 2020. https://doi.org/10.32658/10497/22766.

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The study focused on improving kindergarten teachers’ ability to nurture early numeracy development and learning in K2 children. An intervention involving the experimental group included teachers who had already attended in-service training, as part of the initial pilot project, to assist them to understand pedagogical principles, practices and strategies to assist children’s development of numeracy skills, problem solving and reasoning. Further teacher guidelines, detailed lesson plans and mentorship were also provided on how to implement this in the classroom. The research adopted a pre-test
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Sessa, Guido, та Gregory Martin. MAP kinase cascades activated by SlMAPKKKε and their involvement in tomato resistance to bacterial pathogens. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7699834.bard.

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The research problem: Pseudomonas syringae pv. tomato (Pst) and Xanthomonas campestrispv. vesicatoria (Xcv) are the causal agents of tomato bacterial speck and spot diseases, respectively. These pathogens colonize the aerial parts of the plant and cause economically important losses to tomato yield worldwide. Control of speck and spot diseases by cultural practices or chemicals is not effective and genetic sources of resistance are very limited. In previous research supported by BARD, by gene expression profiling we identified signaling components involved in resistance to Xcvstrains. Follow u
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