Báo cáo toán học: "Coverings, Laplacians, and Heat Kernels of Directed Graphs" ppt

... feature of the type-I band transition. Therefore, the interband transition of the GaSb QD would be the only proper origin of the high-energy peak. In the growth process of the sample, the InGaAs ... light emission intensity of the GaSb QD could be stronger than the type II transition due to the stronger spatial confinement of carriers in the QD and the...

Ngày tải lên: 20/06/2014, 20:20

... formatted PDF and full text (HTML) versions will be made available soon. Structural, optical and magnetic studies of manganese-doped zinc oxide hierarchical microspheres by self-assembly of nanoparticles Nanoscale ... original work is properly cited. 1 Structural, optical, and magnetic studies of manganese-doped zinc oxide hierarchical micros...

Ngày tải lên: 20/06/2014, 20:20

... knowledge, there are no reports about the chemical content and biological effect of the essential oils of L. resedifolia. There no reports on the essential oils of the species of the genus launaea ... due to the geographical location and the harvesting period. It is noteworthy that the results of this study may be considered as the first report on...

Ngày tải lên: 20/06/2014, 20:20

... screening of hydrazones Schiff and Mannich bases of isatin derivatives. Eur J Med Chem 36:615–623 Antioxidant, antimicrobial, and theoretical studies of the thiosemicarbazone derivative Schiff base ... structure of the IMHC. Figure 2. The effect of test organism toward synthesized compound. Figure 3. The effect of tested fungi toward synthesized c...

Ngày tải lên: 20/06/2014, 20:20

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Ngày tải lên: 05/08/2014, 10:20

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Ngày tải lên: 05/08/2014, 15:20

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Ngày tải lên: 05/08/2014, 15:21

... of Mathematics 34:4 (2006) 495–499 Short Communications Controllability Radii and Stabilizability Radii of Time-Inv ariant Linear Systems D. C. Khanh and D. D. X. Thanh Dept. of Info. Tech. and ... obtain Controllability Radii and Stabilizability Radii of Time-Invariant Linear Systems 499 r AB = √ 2,r A =2,r B =2,r F =1. References 1. John S. Bay, Fundamenta...

Ngày tải lên: 06/08/2014, 05:20

... ⊂ R → R and an arbitrary linear function always has property (α γ ), then f must be outer Outer γ- Convexity and Inner γ- Convexity of Disturbed Functions 109 γ- convex, i.e., only outer γ- convex ... follow- ing. Vietnam Journal of Mathematics 35:1 (2007) 107–119 Outer γ γ γ -Convexity and Inner γ γ γ -Convexity of Disturbed Functions Hoang...

Ngày tải lên: 06/08/2014, 05:20

... factor of 4 of the bound for the undirected case. We have now seen that the eigenvalues of the Laplacian can be used to control the diameter of the graph. It is also known that the eigenvalues of ... for the rate of convergence in terms of λ? Another important consequence of the Laplacian eigenvalues is its relationship with the Cheeger constant of a directed g...

Ngày tải lên: 07/08/2014, 13:21

... signed relative derangements and signed skew derangements. Theorem 2.2. There is a one-to-one correspondence between the set of signed relative derangements on [n] and the set of signed skew derangements ... This goal is achieved by introducing the notion of signed relative derangements, or relative derangements of type B. The concept of derangements...

Ngày tải lên: 07/08/2014, 15:22

... a given one-factorization of K n .  The next infinite class of one-factorizations yields further examples of k-cycle free and k < -cycle free one-factorizations of complete graphs. Construction ... k < -cycle free one-factorizations of the complete graph. This appears to be much more difficult. One obvious argument is that perfect one-factorizations of K 2n a...

Ngày tải lên: 07/08/2014, 21:21

... eigenfunctions of the Laplacian L (l) . 4 The heat kernel of a graph and its covering We extend the definition of the heat kernel ([1]) to directed graphs. Given a weighted directed graph G, the heat kernel ... extend the methods of [3] and use them to compare the eigenvalues and eigenfunctions of the base and the cover graphs. As an application, we calculate the h...

Ngày tải lên: 07/08/2014, 21:21