Results 31 to 40 of about 19,866,917 (354)

First passage problems for upwards skip-free random walks via the scale functions paradigm

open access: yesAdvances in Applied Probability, 2019
In this paper we develop the theory of the W and Z scale functions for right-continuous (upwards skip-free) discrete-time, discrete-space random walks, along the lines of the analogous theory for spectrally negative Lévy processes.
F. Avram, M. Vidmar
semanticscholar   +1 more source

A Review of First-Passage Theory for the Segerdahl-Tichy Risk Process and Open Problems

open access: yesRisks, 2019
The Segerdahl-Tichy Process, characterized by exponential claims and state dependent drift, has drawn a considerable amount of interest, due to its economic interest (it is the simplest risk process which takes into account the effect of interest rates).
Florin Avram, Jose-Luis Perez-Garmendia
doaj   +1 more source

Factorial Structure of the EOCL-1 Scale to Assess Executive Functions

open access: yesFrontiers in Psychology, 2021
The process of assessing executive functions through behavioral observation scales is still under theoretical and empirical construction. This article reports on the analysis of the factorial structure of the EOCL-1 scale that assesses executive ...
Carlos Ramos-Galarza   +4 more
doaj   +1 more source

Evaluation of hierarchical vector basis functions for quadrilateral cells [PDF]

open access: yes, 2011
New hierarchical vector basis functions for quadrilateral cells are introduced, and the matrix condition numbers associated with their use are compared to those of existing vector basis families to assess the relative linear independence of the functions.
Peterson A. F.   +4 more
core   +1 more source

Surface Family with Bertrand Curves as Joint Asymptotic Curves in 3D Galilean Space

open access: yesMathematics, 2023
The primary objective of this work is to discuss a surface family with the similarity of Bertrand curves in 3D Galilean space. Subsequently, by applying the Serret–Frenet frame, we estimate the sufficient and necessary statuses of a surface family with ...
Awatif Al-Jedani, Rashad A. Abdel-Baky
doaj   +1 more source

Special, conjugate and complete scale functions for spectrally negative Lévy processes [PDF]

open access: yes, 2007
Following from recent developments in Hubalek and Kyprianou [28], the objective of this paper is to provide further methods for constructing new families of scale functions for spectrally negative Levy processes which are completely explicit. This is the
A. Kyprianou, V. Rivero
semanticscholar   +1 more source

Advances and visions in large-scale hydrological modelling : findings from the 11th Workshop on Large-Scale Hydrological Modelling [PDF]

open access: yes, 2008
Large-scale hydrological modelling has become increasingly wide-spread during the last decade. An annual workshop series on large-scale hydrological modelling has provided, since 1997, a forum to the German-speaking community for discussing recent ...
K. Berkhoff   +21 more
core   +1 more source

Fluctuation Theory for Upwards Skip-Free Lévy Chains

open access: yesRisks, 2018
A fluctuation theory and, in particular, a theory of scale functions is developed for upwards skip-free Lévy chains, i.e., for right-continuous random walks embedded into continuous time as compound Poisson processes.
Matija Vidmar
doaj   +1 more source

Optimal Scale Selection in Random Multi-scale Ordered Decision Systems [PDF]

open access: yesJisuanji kexue, 2022
Aiming at the knowledge acquisition problem of multi-scale ordered information system obtained from random experiments,concepts of random multi-scale ordered information systems and dominance-equivalence-relations-based random multi-scale ordered ...
FANG Lian-hua, LIN Yu-mei, WU Wei-zhi
doaj   +1 more source

The carbohydrate-active enzyme database: functions and literature

open access: yesNucleic Acids Res., 2021
Thirty years have elapsed since the emergence of the classification of carbohydrate-active enzymes in sequence-based families that became the CAZy database over 20 years ago, freely available for browsing and download at www.cazy.org. In the era of large
E. Drula   +5 more
semanticscholar   +1 more source

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