Relevant bibliographies by topics / Prime densitie

Academic literature on the topic 'Prime densitie'

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Published: 9 March 2023

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Journal articles on the topic "Prime densitie"

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BALLOT, CHRISTIAN, and MIREILLE CAR. "ON MURATA DENSITIES." International Journal of Number Theory 07, no. 07 (November 2011): 1717–36. http://dx.doi.org/10.1142/s179304211100440x.

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In this paper, we set up an abstract theory of Murata densities, well tailored to general arithmetical semigroups. In [On certain densities of sets of primes, Proc. Japan Acad. Ser. A Math. Sci.56(7) (1980) 351–353; On some fundamental relations among certain asymptotic densities, Math. Rep. Toyama Univ.4(2) (1981) 47–61], Murata classified certain prime density functions in the case of the arithmetical semigroup of natural numbers. Here, it is shown that the same density functions will obey a very similar classification in any arithmetical semigroup whose sequence of norms satisfies certain general growth conditions. In particular, this classification holds for the set of monic polynomials in one indeterminate over a finite field, or for the set of ideals of the ring of S-integers of a global function field (S finite).
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Hasegawa, Takehiro, and Seiken Saito. "A generalization of the graph theory prime-number theorem of a finite graph." International Journal of Mathematics 26, no. 09 (August 2015): 1550071. http://dx.doi.org/10.1142/s0129167x15500718.

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In the first half, we present a generalization of the graph theory prime-number theorem due to Audrey Terras et al. In the last half, we study relations between several densities of a subset consisting of primes in a graph, and by using the first result, we compute a distribution of a subset. This is an answer for the "research problem" in the page 197 of Terras' textbook "Zeta Functions of Graphs."
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Härdle, Wolfgang, and Zdeněk Hlávka. "Dynamics of state price densities." Journal of Econometrics 150, no. 1 (May 2009): 1–15. http://dx.doi.org/10.1016/j.jeconom.2009.01.005.

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Moser, Jan. "On gigantic density of zeros of some signals defined by prime numbers." Czechoslovak Mathematical Journal 45, no. 1 (1995): 175–90. http://dx.doi.org/10.21136/cmj.1995.128507.

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Fujita, Takahiko. "Some asymptotic estimates of transition probability densities for generalized diffusion processes with self-similar speed measures." Publications of the Research Institute for Mathematical Sciences 26, no. 5 (1990): 819–40. http://dx.doi.org/10.2977/prims/1195170736.

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IVIĆ, ALEKSANDAR, and GÉRALD TENENBAUM. "LOCAL DENSITIES OVER INTEGERS FREE OF LARGE PRIME FACTORS." Quarterly Journal of Mathematics 37, no. 4 (1986): 401–17. http://dx.doi.org/10.1093/qmath/37.4.401.

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Jacobson Jr., Michael J., and Hugh C. Williams. "New quadratic polynomials with high densities of prime values." Mathematics of Computation 72, no. 241 (May 2, 2002): 499–520. http://dx.doi.org/10.1090/s0025-5718-02-01418-7.

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Kural, Michael, Vaughan McDonald, and Ashwin Sah. "Möbius formulas for densities of sets of prime ideals." Archiv der Mathematik 115, no. 1 (April 29, 2020): 53–66. http://dx.doi.org/10.1007/s00013-020-01458-z.

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Krohne, David T. "Demographic characteristics of Peromyscus leucopus inhabiting a natural dispersal sink." Canadian Journal of Zoology 67, no. 9 (September 1, 1989): 2321–25. http://dx.doi.org/10.1139/z89-325.

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The population biology of white-footed mice (Peromyscus leucopus) inhabiting a 1.4-ha naturally occurring dispersal sink was studied for 5 years in west-central Indiana and compared with that in surrounding old-growth habitat. Densities in the dispersal sink were consistently lower than in prime habitat. Autumn and winter survival were practically nil. The sink was recolonized by adults in the spring following extreme low winter densities or extinction. Summer reproductive rates and the pattern of territoriality were similar to those in prime habitat. Mice colonized elsewhere when empty prime habitat was made experimentally available. The data suggest that few dispersing mice can be accommodated by the dispersal sink.
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Karl Härdle, Wolfgang, Brenda López-Cabrera, and Huei-Wen Teng. "State price densities implied from weather derivatives." Insurance: Mathematics and Economics 64 (September 2015): 106–25. http://dx.doi.org/10.1016/j.insmatheco.2015.05.001.

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Dissertations / Theses on the topic "Prime densitie"

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BATTISTONI, FRANCESCO. "APPLICATIONS OF PRIME DENSITIES IN NUMBER THEORY AND CLASSIFICATION OF NUMBER FIELDS WITH BOUNDED INVARIANTS." Doctoral thesis, Università degli Studi di Milano, 2020. http://hdl.handle.net/2434/703505.

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This Ph.D. thesis collects the author's works and interests in several parts of Number Theory, from algebraic problems related to relations between number fields which are based on the factorization of prime numbers in the rings of integers, up to the application of tools concerning the density of primes with given splitting type in number fields to the computation of the average rank of specific families of elliptic curves, concluding finally with the classification and estimate of the main invariants of a number field, like the discriminant and the regulator, pursued by means of analytic formulas and algorithmic methods developed on the previous tools and implemented on suitable computer algebra systems, like PARI/GP.
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Ballot, Christian Jean-Claude. "Density of prime divisors in linear-recurring sequences." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/186078.

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A general density theory of the set of prime divisors of linear recurring sequences with constant coefficients of any order is built up from the work of Lucas, Laxton, Hasse, and Lagarias. In particular, in this theory the notion of the rank of a prime divisor of a second order recurring sequence (Lucas), the group associated with a given recursion (Laxton), and the effective computation of densities (Hasse and Lagarias) are generalized and combined.
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Ren, Yu. "Pricing, hedging and testing risky assets in financial markets." Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1238.

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Issaka, Aziz. "Analysis of Variance Based Financial Instruments and Transition Probability Densities Swaps, Price Indices, and Asymptotic Expansions." Diss., North Dakota State University, 2018. https://hdl.handle.net/10365/31742.

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This dissertation studies a couple of variance-dependent instruments in the financial market. Firstly, a number of aspects of the variance swap in connection to the Barndorff-Nielsen and Shephard model are studied. A partial integro-differential equation that describes the dynamics of the arbitrage-free price of the variance swap is formulated. Under appropriate assumptions for the first four cumulants of the driving subordinator, a Ve\v{c}e\v{r}-type theorem is proved. The bounds of the arbitrage-free variance swap price are also found. Finally, a price-weighted index modulated by market variance is introduced. The large-basket limit dynamics of the price index and the ``error term" are derived. Empirical data driven numerical examples are provided in support of the proposed price index. We implemented Feynman path integral method for the analysis of option pricing for certain L\'evy process-driven financial markets. For such markets, we find closed form solutions of transition probability density functions of option pricing in terms of various special functions. Asymptotic analysis of transition probability density functions is provided. We also find expressions for transition probability density functions in terms of various special functions for certain L\'evy process-driven markets where the interest rate is stochastic.
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Soguel, Alexander Ludivine. "Gain de poids à l'âge adulte et densité mammaire." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/27240.

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Tableau d'honneur de la Faculté des études supérieures et postdorales, 2015-2016
L’adiposité est un facteur de risque connu pour le cancer du sein et le gain de poids à l’âge adulte semble l’être également. Au niveau mammaire, le tissu adipeux peut être étudié au travers des mesures de densité. En effet, la zone non-dense reflète le gras mammaire et le pourcentage de densité, l’un des plus importants facteurs de risque pour le cancer du sein, reflète la proportion de tissu fibroglandulaire. Le premier objectif de ce mémoire était d’évaluer, chez 1435 femmes recrutées lors d’une mammographie de dépistage, l’association entre le gain de poids à l’âge adulte et trois paramètres de mesure de densité mammaire : le pourcentage de densité et les zones dense et non-dense en valeurs absolues. Le second objectif était de présenter un texte de synthèse et de discussion portant sur les interrelations entre l’adiposité, la densité mammaire et le risque de cancer du sein.
Adiposity is a known risk factor for breast cancer and weight gain during adulthood also seems to play a role. In the breast, adipose tissue can be studied through breast density features. Indeed, absolute non-dense area reflects breast fat and percent density, one of the strongest risk factor for breast cancer, reflects the proportion of fibroglandular tissue. The first objective of this dissertation was to evaluate the association between weight gain during adulthood and three density features: percent density, absolute dense and non-dense areas, among 1435 women recruited at screening mammography. The second objective was to present a consolidated text of the interrelation between adiposity, breast density and breast cancer risk and to discuss it in an epidemiological and biological point of view.
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Melo, Fernanda Diniz de. "Uma forma quadrática no corpo de condutor primo /." São José do Rio Preto : [s.n.], 2005. http://hdl.handle.net/11449/94265.

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Orientador: Trajano Pires da Nóbrega Neto
Banca: André Luíz Flores
Banca: José Othon Dantas Lopes
Resumo: O principal objetivo deste trabalho é calcular a densidade de centro da representação geométrica do ideal totalmente ramificado em corpos de condutor primo. Primeiro, fazemos a caracterização dos subcorpos do p-ésimo corpo ciclotômico e dos elementos do ideal, também calculamos a norma desse ideal. Em seguida, é apresentada uma forma quadrática e explicitado o seu mínimo para o cálculo do raio de empacotamento dessa representação geométrica. Finalizamos com o cálculo da densidade de centro.
Abstract: The main aim of this work is to calculate density of the center from the geometric representation of the totally ramified ideal in prime conductor fields. First of all, we make the characterization of the elements from subfields of the p-th cyclotomic field and from the ideal of the elements, we also calculate the norm of this ideal. After that, a quadratic form is presented and exhibit its minimun for the radius of packing calculation this geometric representation. Concluding with the center density calculation.
Mestre
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Melo, Fernanda Diniz de [UNESP]. "Uma forma quadrática no corpo de condutor primo." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/94265.

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Made available in DSpace on 2014-06-11T19:26:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-12-16Bitstream added on 2014-06-13T18:06:54Z : No. of bitstreams: 1 melo_fd_me_sjrp.pdf: 346555 bytes, checksum: ff1f3651e3e5a108fe83b33dbae4e46b (MD5)
O principal objetivo deste trabalho é calcular a densidade de centro da representação geométrica do ideal totalmente ramificado em corpos de condutor primo. Primeiro, fazemos a caracterização dos subcorpos do p-ésimo corpo ciclotômico e dos elementos do ideal, também calculamos a norma desse ideal. Em seguida, é apresentada uma forma quadrática e explicitado o seu mínimo para o cálculo do raio de empacotamento dessa representação geométrica. Finalizamos com o cálculo da densidade de centro.
The main aim of this work is to calculate density of the center from the geometric representation of the totally ramified ideal in prime conductor fields. First of all, we make the characterization of the elements from subfields of the p-th cyclotomic field and from the ideal of the elements, we also calculate the norm of this ideal. After that, a quadratic form is presented and exhibit its minimun for the radius of packing calculation this geometric representation. Concluding with the center density calculation.
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Gagnon, Katherine. "Impact d'une prise en charge multidisciplinaire sur la fonctionnalité des particules HDL d'adolescents présentant un surplus pondéral." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/32567.

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Protocole d'entente entre l'Université Laval et l'Université du Québec à Chicoutimi
La prévalence de l’obésité chez les enfants et les adolescents a augmenté de façon importante depuis les dernières décennies. Celle-ci peut apporter des conséquences néfastes sur la santé cardiovasculaire et ainsi, entrainer un développement précoce de l’athérosclérose. L’obésité est, entre autres, associée à une diminution des niveaux de cholestérol HDL et à une diminution de la fonctionnalité des particules HDL. Récemment, il a été démontré que la fonctionnalité des particules HDL était inversement associée au risque de maladies coronariennes. Cependant, peu d’études se sont intéressées à ce sujet chez les jeunes. L’objectif principal de ce projet de maîtrise était d’évaluer l’impact d’un programme d’intervention multidisciplinaire sur la fonctionnalité des particules HDL chez l’adolescent obèse. Vingt-neuf adolescents (16 garçons et 13 filles) âgés de 11 à 16 ans ont participé à cette étude. Le but de l’intervention était d’améliorer les habitudes alimentaires et d’augmenter le niveau d’activité physique. Les jeunes ont été suivis par une équipe multidisciplinaire et ont participé à trois séances d’entrainement par semaine, et ce, pendant 16 semaines. Les résultats suggèrent qu’un programme d’intervention multidisciplinaire peut contribuer à améliorer le profil de risque et la capacité d’efflux des particules de cholestérol HDL chez des adolescents obèses. De plus, ils indiquent que les changements dans la capacité d’efflux des particules de cholestérol HDL sont liés aux changements dans les concentrations de cholestérol HDL.
The prevalence of childhood obesity has significantly increased over the past decades. This increased have adverse effects on cardiovascular health, leading to early development of atherosclerosis. Obesity is associated with a reduced HDL cholesterol level and with a decreased efflux capacity of HDL particles. Recently, it has been shown that efflux capacity of HDL particles is inversely associated with the risk of coronary heart disease. However, only few studies have addressed this issue in obese adolescents. The main objective of this study was to assess the impact of a multidisciplinary intervention program on HDL cholesterol efflux capacity (CEC) in obese adolescents. Twenty-nine adolescents (16 boys and 13 girls) aged 11 to 16 years were involved in this study. The goal of the intervention was to improve eating habits and increase the level of physical activity. Each youth was followed by a multidisciplinary team and trained three sessions per week for 16 weeks. Results suggest that a multidisciplinary intervention program can help to improve risk profile and HDL CEC in obese adolescents. In addition, results indicate that changes in HDL CEC are related to changes in HDL cholesterol concentrations
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Ayadim, Abderrahime. "Structure et thermodynamique des suspensions colloïdales en phase volumique et confinée par la théorie des mélanges binaires." Paris 12, 2005. https://athena.u-pec.fr/primo-explore/search?query=any,exact,990002513970204611&vid=upec.

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Les équations intégrales d'Ornstein-Zernike sont utilisées pour étudier la structure et la thermodynamique de suspensions colloïdales modélisées par un mélange binaire très dissymétrique en taille. Nous proposons une nouvelle fermeture surmontant le problème de non-convergence de la fermeture RHNC dans la variante de la théorie des mesures fondaùmentales de Rosenfeld. Après l'avoir testée sur les fonctions de distributions radiales, nous calculons la ligne de coexistence de phase fluide-fluide du mélange de sphères dures de rapport taille R=10. Nous confirmons ainsi à partir du diagramme de phase la validité de l'approche du fluide effectif. Nous examinons ensuite ces systèmes en phase inhomogène (face à un mur ou confinées entre deux murs) en incluant des forces attractives entre les différents constituants. La fermeture RHNC est testée alors au niveau de la structure et du potentiel de force moyenne intercolloïdale. La méthode est ensuite utilisée pour étudier la solvation
The Ornstein-Zernike integral equations are used to study the structure and the thermodynamics of colloidal suspensions modelled as a highly asymmetric solute-solvent mixture. We propose a new closure to remedy the non-convergence problem of the RHNC closure. After having tested it on the radial distribution functions, we determine the fluid-fluid coexistence line of asymmetric binary hard spheres with diameter ration R=10. We thus confirm from the phase diagram the validity of the effective one-component approach. Then, we examine these sytems in inhomogeneous phase (colloids near a wall or in a slit pore) and include attractions between the various components. The RHNC closure is tested then at the level of the structure and the potential of mean force. The method is finally used to study solvation effects of confined colloids
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Renfroe, Laura A. "The International iPad Index: Price Variants across Countries and Associated Population Factors." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/cmc_theses/731.

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The goal of this research was to determine which population factors were associated with iPad pricing differences across countries. Specifically, this paper measured the relationship between iPad prices in a given country and its U.S. dollar exchange rate, amount of income inequality, Gross Domestic Product per capita, luxury good sales growth, Individualism Index score, and population density. Panel data was collected for the iPad 2, the iPad Retina, and the iPad Mini tablets from 38 countries of varying geographic locations, economic paradigms, and political structures. The pooled data set yielded 114 observations in total. Regressing iPad price as a percent of national average income revealed a positive relationship between price and status consciousness as well as cultural individualism. There existed a negative relationship between iPad price and luxury sales growth. These results indicated that the iPad served as a status symbol with higher demand in countries that promoted individualism and exhibited higher degrees of income inequality.
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Books on the topic "Prime densitie"

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Ballot, Christian. Density of prime divisors of linear recurrences. Providence, R.I: American Mathematical Society, 1995.

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Fiolhais, Carlos, Fernando Nogueira, and Miguel A. L. Marques, eds. A Primer in Density Functional Theory. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-37072-2.

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Aït-Sahalia, Yacine. Nonparametric estimation of state-price densities implicit in financial asset prices. Cambridge, MA: National Bureau of Economic Research, 1995.

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Option pricing : modeling and extracting state-price densities: A new methodology. Bern: Verlag Paul Haupt, 1999.

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Raaij, Gabriela De. Evaluating density forecasts with an application to stock market returns. Wien: Oesterreichische Nationalbank, 2002.

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Hitchcock, John. A primer on the use of density in land use planning. Toronto: Program in Planning, University of Toronto, 1994.

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Hitchcock, John. A primer on the use of density in land use planning. Toronto: Program in Planning, University of Toronto, 1994.

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Hitchcock, John. A primer on the use of density in land use planning. Toronto: Program in Planning, University of Toronto, 1994.

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Horsley, Anthony. The existence of an equilibrium price density for marginal cost pricing. London: International Centre for Economics and Related Disciplines, 1989.

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Wells, L. G. Bulk density response to placement methods and remedial measures in reconstructed prime farmland soils. S.l: s.n, 1992.

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Book chapters on the topic "Prime densitie"

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Fine, Benjamin, and Gerhard Rosenberger. "The Density of Primes." In Number Theory, 143–218. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43875-7_4.

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Stevens, M. Henry H. "Density-independent Demography." In A Primer of Ecology with R, 33–60. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-89882-7_2.

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Stevens, M. Henry H. "Density-dependent Growth." In A Primer of Ecology with R, 61–109. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-89882-7_3.

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Stevens, M. Henry H. "Simple Density-independent Growth." In A Primer of Ecology with R, 3–31. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-89882-7_1.

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Huynh, Kim, Pierre Kervella, and Jun Zheng. "Estimating State-Price Densities with Nonparametric Regression." In Applied Quantitative Finance, 171–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-05021-7_8.

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Lewis, Daniel. "Kernel Density Estimation and Percent Volume Contours." In Geocomputation: A Practical Primer, 169–84. 1 Oliver's Yard, 55 City Road London EC1Y 1SP: SAGE Publications, Inc., 2015. http://dx.doi.org/10.4135/9781473916432.n10.

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Lang, Serge. "Density of Primes and Tauberian Theorem." In Graduate Texts in Mathematics, 303–19. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4684-0296-4_15.

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Lang, Serge. "Density of Primes and Tauberian Theorem." In Graduate Texts in Mathematics, 303–19. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4612-0853-2_15.

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Da Costa Lewis, Nigel. "Nonparametric Density Estimation for Energy Price Returns." In Energy Risk Modeling, 107–24. London: Palgrave Macmillan UK, 2005. http://dx.doi.org/10.1057/9780230523784_6.

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Pinsky, Ross G. "Chebyshev’s Theorem on the Asymptotic Density of the Primes." In Universitext, 67–74. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07965-3_6.

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Conference papers on the topic "Prime densitie"

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Hoberg, Stefan, and Dietmar Ehrhardt. "A demodulation inductive proximity sensor with suppression of background magnetic flux density." In 2011 7th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2011. http://dx.doi.org/10.1109/prime.2011.5966241.

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Seu, Giovanni Pietro, Gian Nicola Angotzi, Giuseppe Tuveri, Luigi Raffo, Luca Berdondini, Alessandro Maccione, and Paolo Meloni. "A closed-loop system for neural networks analysis through high density MEAs." In 2017 13th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2017. http://dx.doi.org/10.1109/prime.2017.7974172.

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Di Benedetto, Marco, Luca Solero, Fabio Crescimbini, Alessandro Lidozzi, and Petar J. Grbovic. "5-Level E-type back to back power converters—A new solution for extreme efficiency and power density." In 2017 13th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2017. http://dx.doi.org/10.1109/prime.2017.7974177.

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Chlis, Ilias, Domenico Pepe, and Domenico Zito. "Analyses of phase noise reduction techniques in CMOS Colpitts oscillator topology at the mm-waves: Noise filter and optimum current density." In 2015 11th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2015. http://dx.doi.org/10.1109/prime.2015.7251370.

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Hodge, C. G., and J. F. Eastham. "Machine Spatial Air Gap Flux Density Analysis." In SNAME 5th World Maritime Technology Conference. SNAME, 2015. http://dx.doi.org/10.5957/wmtc-2015-234.

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Electrical rotating machines operate through the interaction of electrical currents with magnetic flux that may itself be created through other electrical currents. In both cases the magnetic flux present in the air gap of the machine is a crucial component of its overall performance dictating, among other things, torque (and hence machine size) and noise and vibration. Both these particular aspects are of prime importance to designers of electrical propulsion motors for naval applications. The prime aspect of the magnetic flux in the air gap is its shape or profile which has a direct bearing on both torque density and torque pulsations. This paper describes a method to analyse a machine winding through application of Fourier Series to determine the efficacy of the winding with regard to machine excitation. The method is first explained by analysing a conventional winding and then applied to a Fractional Slot Winding and a Dual Winding.
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Rooney, Ian M., and John R. Buck. "Multitapered power spectral density estimation for co-prime sensor arrays." In 2015 49th Asilomar Conference on Signals, Systems and Computers. IEEE, 2015. http://dx.doi.org/10.1109/acssc.2015.7421151.

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Dipu Kabir, H. M., Abbas Khosravi, M. Anwar Hosen, Saeid Nahavandi, and Rajkumar Buyya. "Probability Density for Amazon Spot Instance Price." In 2019 IEEE International Conference on Industrial Technology (ICIT). IEEE, 2019. http://dx.doi.org/10.1109/icit.2019.8754951.

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WONG, S. K., K. W. CHAU, Y. YAU, and A. K. C. CHEUNG. "PROPERTY PRICE, FLOOR LEVEL, AND BUILDING DENSITY." In Tall Buildings from Engineering to Sustainability - Sixth International Conference on Tall Buildings, Mini Symposium on Sustainable Cities, Mini Symposium on Planning, Design and Socio-Economic Aspects of Tall Residential Living Environment. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701480_0128.

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Lozza, Sergio Ortobelli, and Noureddine Kouaissah. "Alternative Methods to Estimate the State Price Density." In 2015 Second International Conference on Mathematics and Computers in Sciences and in Industry (MCSI). IEEE, 2015. http://dx.doi.org/10.1109/mcsi.2015.19.

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Wang, Shidong, Lyndon Lamborn, Karina Chevil, Erwin Gamboa, and Weixing Chen. "Dense and Sparse Stress Corrosion Crack Initiation in an X65 Pipeline Steel With Mill Scale." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9510.

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Abstract Near-neutral pH stress corrosion cracking (SCC) is a significant threat to the operational safety and reliability of gas and oil pipelines. The SCC cracks are typically formed in colonies with different crack density populations on the external surface of the pipe. The density of SCC cracks affect how pipeline integrity and remaining lifetime are assessed. Although sparse and dense crack colonies are commonly observed on pipelines, it has not been well established how these crack colonies with different crack populations were developed in the field. This research was made in an attempt to replicate near-neutral pH SCC cracks with different crack densities in the laboratory with realistic loading conditions commonly found during field operation. An X65 pipeline steel with different surface preparations was used. The results showed that the dense near-neutral pH SCC cracks were successfully reproduced on the primer-coated samples, whereas sparse cracks were reproduced on the mill-scaled and polished samples. The densely spaced cracks could transform into sparsely spaced cracks when most of the primer layer and mill scale had been removed during the long period of corrosion under cyclic loading and further corrosion occurred thinning the crack density. The results of crack initiation obtained from this investigation have also been found to be quite consistent with crack initiation scenarios found during field operation.
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Reports on the topic "Prime densitie"

1

Ait-Sahalia, Yacine, and Andrew Lo. Nonparametric Estimation of State-Price Densities Implicit in Financial Asset Prices. Cambridge, MA: National Bureau of Economic Research, November 1995. http://dx.doi.org/10.3386/w5351.

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2

Lundstrom, Blake. The Google High Power Density Inverter Prize: Innovation in PV Inverter Power Density: Cooperative Research and Development Final Report, CRADA Number: CRD-14-568. Office of Scientific and Technical Information (OSTI), May 2017. http://dx.doi.org/10.2172/1356792.

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3

Rodier, Caroline, Andrea Broaddus, Miguel Jaller, Jeffery Song, Joschka Bischoff, and Yunwan Zhang. Cost-Benefit Analysis of Novel Access Modes: A Case Study in the San Francisco Bay Area. Mineta Transportation Institute, November 2020. http://dx.doi.org/10.31979/mti.2020.1816.

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The first-mile, last-mile problem is a significant deterrent for potential transit riders, especially in suburban neighborhoods with low density. Transit agencies have typically sought to solve this problem by adding parking spaces near transit stations and adding stops to connect riders to fixed-route transit. However, these measures are often only short-term solutions. In the last few years, transit agencies have tested whether new mobility services, such as ridehailing, ridesharing, and microtransit, can offer fast, reliable connections to and from transit stations. However, there is limited research that evaluates the potential impacts of these projects. Concurrently, there is growing interest in the future of automated vehicles (AVs) and the potential of AVs to solve this first-mile problem by reducing the cost of providing these new mobility services to promote access to transit. This paper expands upon existing research to model the simulate the travel and revenue impacts of a fleet of automated vehicles that provide transit access services in the San Francisco Bay Area offered over a range of fares. The model simulates a fleet of AVs for first-mile transit access at different price points for three different service models (door-to-door ridehailing and ridesharing and meeting point ridesharing services). These service models include home-based drop-off and pick-up for single passenger service (e.g., Uber and Lyft), home-based drop-off and pick-up for multi-passenger service (e.g., microtransit), and meeting point multi-passenger service (e.g., Via).
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