Results 241 to 250 of about 1,348 (276)
Some of the next articles are maybe not open access.
Epidemic dynamics on semi-directed complex networks
Mathematical Biosciences, 2013In this paper an SIS model for epidemic spreading on semi-directed networks is established, which can be used to examine and compare the impact of undirected and directed contacts on disease spread. The model is analyzed for the case of uncorrelated semi-directed networks, and the basic reproduction number R0 is obtained analytically.
Zhang, Xiaoguang +4 more
openaire +3 more sources
Orbital Convolution Theory for Semi-Direct Products
Journal of Lie Theory, 2006Previous work of the authors [Funct. Anal. Appl, 27, No. 1, 25--32 (1993); translation from Funkts. Anal. Prilozh. 27, No. 1, 25--32 (1993; Zbl 0804.22011); Trans. Am. Math. Soc. 351, 477--495 (1999; Zbl 0911.22005); Linear Multilinear Algebra 36, No.
Dooley, A. H., Wildberger, N. J.
openaire +2 more sources
Produits semi-directs acycliques
Archiv der Mathematik, 1987On relie, dans cet article, l'homologie du classifiant pour les ''variations'' de \(\Gamma\)-structures à l'homologie à coefficients tordus du groupe des difféomorphismes, considéré comme groupe discret. Certains résultats d'acyclicité sont donnés, en particulier pour l'homologie du groupe linéaire d'un espace vectoriel de dimension infinie à ...
openaire +1 more source
Semi-supervised Learning on Directed Graphs.
2005Given a directed graph in which some of the nodes are labeled, we investigate the question of how to exploit the link structure of the graph to infer the labels of the remaining unlabeled nodes. To that extent we propose a regularization framework for functions defined over nodes of a directed graph that forces the classification function to change ...
Zhou, D., Schölkopf, B., Hofmann, T.
openaire +2 more sources
Direct semi-blind MMSE equalization for STBC
IEEE Signal Processing Letters, 2005A semi-blind method for minimum mean square square error (MMSE) equalization of space-time block coding (STBC) systems is proposed. By exploiting information from the redundancy in the structure of STBC as well as from the training symbols, MMSE equalization can be achieved without channel estimation.
Ding, Z., Ward, D.
openaire +1 more source
The validity of direct versus semi- direct oral tests
Language Testing, 1994The article reports the results of a study which examined the validity of two oral language tests - one direct and one semi-direct. While concurrent validity of the two types of tests (as obtained via correlations in a number of earlier studies) was high, a variety of qualitative analyses indicated that the two tests differed in a number of aspects ...
openaire +1 more source
On the Essential Dimension of Some Semi-Direct Products
Canadian Mathematical Bulletin, 2002AbstractWe give an upper bound on the essential dimension of the group over the rational numbers, when q is a prime power.
openaire +1 more source
Direct theorems in semi-infinite convex programming
Mathematical Programming, 1981We show that a semi-infinite quasi-convex program with certain regularity conditions possesses finitely constrained subprograms with the same optimal value. This result is applied to various problems.
openaire +2 more sources
Direct and semi-direct posterior composite restorations.
Practical periodontics and aesthetic dentistry : PPAD, 1997Since the introduction of composite resins in dentistry, the adhesive properties of the material to enamel and dentin surfaces have been improved considerably, resulting in more conservative cavity preparation and the preservation of natural tooth structure.
openaire +1 more source
Representations of Semi-direct Products
2017In this chapter, we will examine some aspects of representations of semi-direct products, in particular for the case of the Jacobi group and its Lie algebra, as well as the case of \(N\rtimes K\), for N commutative. The latter case includes the Euclidean groups E(d), as well as the Poincare group which will come into play once we introduce special ...
openaire +1 more source