Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: conditional density

Sortuj według:

Ogranicz wyniki do:

Joint frequency analysis of river flow rate and suspended sediment load using conditional density of copula functions

Sedighi Matina Pronoos, Ramezani Yousef, Tahroudi Mohammad Nazeri, Taghian Mehrdad

Acta Geophysica

2023

Vol. 71, no. 1

489--501

In this study, the river flow rate and suspended sediment load at Deh Molla hydrometric station in Zohreh River in the period of 1983–2018 were used for copula-based joint frequency. The Frank copula was selected as the best copula. The joint frequency analysis of the studied variables was performed based on the conditional density of the copula functions, which leads to the conditional occurrence probability of the variables. The results showed that with increasing river flow rate and suspended sediment load, the joint return period increases. Also, the joint return period for the "and" state is longer than the joint return period for the "or" state. When the river flow rate exceeds the threshold of 100 m3 /s and suspended sediment load exceeds the threshold of 2.7× 104 ton/day, the joint return periods for the "and" state and for the "or" state, are about 11 and 4 years, respectively.

Local linear approach: conditional density estimate for functional and censored data

Benkhaled Abdelkader, Madani Fethi

Demonstratio Mathematica

2022

Vol. 55, nr 1

315--327

Let Y be a random real response, which is subject to right censoring by another random variable C . In this paper, we study the nonparametric local linear estimation of the conditional density of a scalar response variable and when the covariable takes values in a semi-metric space. Our main aim is to prove under some regularity conditions both the pointwise and the uniform almost-sure consistencies with convergence rates of the conditional density estimator related by this estimation procedure.