Results 21 to 30 of about 219,639 (265)

New Order on Type 2 Fuzzy Numbers

open access: yesAxioms, 2017
Since Lotfi A. Zadeh introduced the concept of fuzzy sets in 1965, many authors have devoted their efforts to the study of these new sets, both from a theoretical and applied point of view. Fuzzy sets were later extended in order to get more adequate and
Pablo Hernández   +3 more
doaj   +1 more source

Discretization Based on Entropy and Multiple Scanning

open access: yesEntropy, 2013
In this paper we present entropy driven methodology for discretization. Recently, the original entropy based discretization was enhanced by including two options of selecting the best numerical attribute.
Jerzy W. Grzymala-Busse
doaj   +1 more source

Decoy Effects in a Massive Real-World Shopping Dataset

open access: yesInternational Journal of Population Data Science, 2023
Introduction & Background A key premise of rational choice prescribes that decision-makers ought to ignore irrelevant, inferior alternative options. Consider for example the choice between two wines, where the value of an option is computed across two ...
Sean Devine   +3 more
doaj   +1 more source

Compound Option Pricing under Fuzzy Environment

open access: yesJournal of Applied Mathematics, 2014
Considering the uncertainty of a financial market includes two aspects: risk and vagueness; in this paper, fuzzy sets theory is applied to model the imprecise input parameters (interest rate and volatility).
Xiandong Wang, Jianmin He, Shouwei Li
doaj   +1 more source

Differential P-Glycoprotein/CD31 Expression as Markers of Vascular Co-Option in Primary Central Nervous System Tumors

open access: yesDiagnostics, 2022
Background: Vascular co-option is one of the main features of brain tumor progression. It is identified using histopathological analysis, but no antibody-specific markers were found, and no universally accepted histological features were defined. Methods:
Tiziana Annese   +6 more
doaj   +1 more source

Option pricing in the model with stochastic volatility driven by Ornstein–Uhlenbeck process. Simulation

open access: yesModern Stochastics: Theory and Applications, 2015
We consider a discrete-time approximation of paths of an Ornstein–Uhlenbeck process as a mean for estimation of a price of European call option in the model of financial market with stochastic volatility.
Sergii Kuchuk-Iatsenko, Yuliya Mishura
doaj   +1 more source

tlrmvnmvt: Computing High-Dimensional Multivariate Normal and Student-t Probabilities with Low-Rank Methods in R

open access: yesJournal of Statistical Software, 2022
This paper introduces the usage and performance of the R package tlrmvnmvt, aimed at computing high-dimensional multivariate normal and Student-t probabilities.
Jian Cao   +3 more
doaj   +1 more source

Test data sets for calibration of stochastic and fractional stochastic volatility models

open access: yesData in Brief, 2016
Data for calibration and out-of-sample error testing of option pricing models are provided alongside data obtained from optimization procedures in ''On calibration of stochastic and fractional stochastic volatility models'' [1].
Jan Pospíšil, Tomáš Sobotka
doaj   +1 more source

Selective Prediction With Long Short-term Memory Using Unit-Wise Batch Standardization for Time Series Health Data Sets: Algorithm Development and Validation

open access: yesJMIR Medical Informatics, 2022
BackgroundIn any health care system, both the classification of data and the confidence level of such classifications are important. Therefore, a selective prediction model is required to classify time series health data according
Borum Nam   +3 more
doaj   +1 more source

GENERATING EFFECTIVE INITIATION SETS FOR SUBGOAL-DRIVEN OPTIONS

open access: yesAdvances in Complex Systems, 2019
Options framework is one of the prominent models serving as a basis to improve learning speed by means of temporal abstractions. An option is mainly composed of three elements: initiation set, option’s local policy and termination condition. Although various attempts exist that focus on how to derive high-quality termination conditions for a given ...
Alper Demir 0002   +2 more
openaire   +3 more sources

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