Results 81 to 90 of about 2,080,038 (236)

Do Firms’ Growth Rates Follow a Random Walk? Evidence from Incubated Small and Medium Enterprises in South Africa

African Journal of Inter-Multidisciplinary Studies, 2023
Debate on the validity of the Law of Proportionate Effect (LPE) on firm growth is ongoing decades after it was postulated by Gibrat in 1931. The theoretical model which asserts that firm growth follows a random walk has been largely tested in developed ...
Helper Zhou, Robert Zondo
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Quantum coherent dynamics in single molecule systems: generalized stochastic Liouville equation [PDF]

, 2020
X. Cai, Yujun Zheng
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Stochastic Volatility. [PDF]

, 2005
Stochastic volatility (SV) is the main concept used in the elds of nancial economics and mathematical nance to deal with the endemic time-varying volatility and codependence found in nancial markets. Such dependence has been known for a long time.
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Stochastic Complexity

Journal of the Royal Statistical Society Series B: Statistical Methodology, 1987
SUMMARY It is argued that all the useful information in observed data that can be extracted with a selected class of modeled distributions, will be obtained if we calculate the stochastic complexity, defined to be the shortest description length of the data. The same quantity also determines the greatest lower bound for prediction errors
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Statistical inference and hypotheses testing of risk averse stochastic programs [PDF]

, 2016
Vincent Guigues, Volker Krätschmer, Alexander Shapiro   +2 more
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Rational stochastic languages

, 2006
The goal of the present paper is to provide a systematic and comprehensive study of rational stochastic languages over a semiring K \in {Q, Q +, R, R+}.
Denis, François, Esposito, Yann
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Estimation for spatial semi-functional partial linear regression model with missing response at random

Demonstratio Mathematica
The aim of this article is to study a semi-functional partial linear regression model (SFPLR) for spatial data with responses missing at random (MAR).
Benchikh Tawfik, Almanjahie Ibrahim M., Fetitah Omar, Attouch Mohammed Kadi   +3 more
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Stochastic modeling for a better approach of the in vitro observed growth of colon adenocarcinoma cells

Brazilian Archives of Biology and Technology, 2006
The definition of a stochastic model that reflects the cell growth and the use of computer software could be very useful in modelling the cell behaviour due to the possibility to introduce alterations in biology parameters to obtain different growth ...
Miguel J. Ruiz-Gómez, Antonio Ruiz-Gómez, Manuel Martínez Morillo   +2 more
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Validating Stochastic Models: Invariance Criteria for Systems of Stochastic Differential Equations and the Selection of a Stochastic Hodgkin-Huxley Type Model

, 2012
In recent years, many difficulties appeared when taking into account the inherent stochastic behavior of neurons and voltage-dependent ion channels in Hodgking-Huxley type models.
Cresson, Jacky, Puig, Bénédicte, Sonner, Stefanie   +2 more
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An AI Digital Platform for Fault Diagnosis and RUL Estimation in Drivetrain Systems Under Varying Operating Conditions

Machines
Drivetrain systems operate under varying operating conditions (OCs), which often obscure early-stage fault signatures and hinder robust condition monitoring (CM).
Dimitrios M. Bourdalos, Xenofon D. Konstantinou, Josef Koutsoupakis, Ilias A. Iliopoulos, Kyriakos Kritikakos, George Karyofyllas, Panayotis E. Spiliotopoulos, Ioannis E. Saramantas, John S. Sakellariou, Dimitrios Giagopoulos, Spilios D. Fassois, Panagiotis Seventekidis, Sotirios Natsiavas   +12 more
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