Results 51 to 60 of about 15,243 (160)

Underlying Dynamics of Typical Fluctuations of an Emerging Market Price Index: The Heston Model from Minutes to Months

, 2005
We investigate the Heston model with stochastic volatility and exponential tails as a model for the typical price fluctuations of the Brazilian S\~ao Paulo Stock Exchange Index (IBOVESPA).
Barndorff-Nielsen, Challet, Charles M. de Toledo, Costa, Di Matteo, Draˇgulescu, Engle, Fouque, Granger, Harvey, Heston, Hull, Johansen, LeBaron, LeBaron, Mantegna, Mirowski, Nestor Caticha, Perelló, Perelló, Renato Vicente, Roehner, Silva, Silva, Sivia, Stein, Takahashi, Vitor B.P. Leite   +27 more
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Diversidad de la comunidad liquénica en un bosque remanente del sur de la región chaqueña (Córdoba, Argentina) [PDF]

, 2014
The lichen community diversity in patches of Chaco forest -NE of Cordoba Province, Argentina- was analyzed. Fifteen forest patches embedded in farmland areas were sampled. Size of the patch and exposure to the crops, were registered.
Estrabou, Cecilia, Quiroga, Carolina, Rodriguez, Juan Manuel   +2 more
core  

Harary and hyper-Wiener indices of some graph operations

Journal of Inequalities and Applications
In this paper, we obtain the Harary index and the hyper-Wiener index of the H-generalized join of graphs and the generalized corona product of graphs. As a consequence, we deduce some of the results in (Das et al. in J. Inequal. Appl. 2013:339, 2013) and
S. Balamoorthy, T. Kavaskar, K. Vinothkumar   +2 more
doaj   +1 more source

Relations between Wiener, hyper-Wiener and some Zagreb type indices [PDF]

Kragujevac Journal of Science, 2019
In this paper, some inequalities between the Wiener, hyper-Wiener, first Zagreb, second Zagreb, first reformulated Zagreb, second reformulated Zagreb and the general Zagreb indices of a simple graph are given.
Ghalavand Ali, Eliasi Mehdi, Ashrafi Ali Reza   +2 more
doaj  

Macrobenthic Community Structure in the Northwestern Arabian Gulf, Twelve Years after the 1991 Oil Spill

Frontiers in Marine Science, 2017
The biota in the Arabian Gulf faces stress both from natural (i.e., hyper salinity and high sea surface temperature), and human (i.e., from oil-related activities) sources. The western Arabian Gulf was also impacted by world's largest oil spill (1991 Oil
Thadickal V. Joydas, Mohammad A. Qurban, Mohammad A. Qurban, Angel Borja, Periyadan K. Krishnakumar, Abdulaziz Al-Suwailem   +5 more
doaj   +1 more source

Wiener Index, Hyper-wiener Index, Harary Index and Hamiltonicity of graphs

, 2018
In this paper, we discuss the Hamiltonicity of graphs in terms of Wiener index, hyper-Wiener index and Harary index of their quasi-complement or complement. Firstly, we give some sufficient conditions for an balanced bipartite graph with given the minimum degree to be traceable and Hamiltonian, respectively.
Yu, Guidong, Ren, Lifang, Cai, Gaixiang
openaire   +2 more sources

Diffusion in the general theory of relativity

, 2010
The Markovian diffusion theory in the phase space is generalized within the framework of the general theory of relativity. The introduction of moving orthonormal frame vectors both for the position as well the velocity space enables to bypass ...
Herrmann, Joachim
core   +1 more source

Effects of Lombard Reflex on the Performance of Deep-Learning-Based Audio-Visual Speech Enhancement Systems

, 2018
Humans tend to change their way of speaking when they are immersed in a noisy environment, a reflex known as Lombard effect. Current speech enhancement systems based on deep learning do not usually take into account this change in the speaking style ...
Jensen, Jesper, Michelsanti, Daniel, Sigurdsson, Sigurdur, Tan, Zheng-Hua   +3 more
core   +1 more source

Stochastic collocation approach with adaptive mesh refinement for parametric uncertainty analysis

, 2017
Presence of a high-dimensional stochastic parameter space with discontinuities poses major computational challenges in analyzing and quantifying the effects of the uncertainties in a physical system.
Bhaduri, Anindya, Graham-Brady, Lori, He, Yanyan, Kirby, Robert M., Shields, Michael D.   +4 more
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On the Wiener index and the hyper-Wiener index of the Kragujevac trees

Proyecciones (Antofagasta), 2023
In this paper, the Wiener index and the hyper-Wiener index of the Kragujevac trees is computed in term of its vertex degrees. As application, we obtain an upper bond and a lower bound for the Wiener index and the hyper-Wiener index of these trees.
openaire   +2 more sources