Results 1 to 10 of about 10,617,144 (190)

A change point-based analysis procedure for improving the success rate of decision-making in clinical trials with delayed treatment effects [PDF]

open access: yesFrontiers in Pharmacology, 2023
A delayed treatment effect is a commonly observed phenomenon in tumor immunotherapy clinical trials. It can cause a loss of statistical power and complicate the interpretation of the analytical findings.
Long-Shen Xie, Hui Lu
doaj   +2 more sources

Detecting Structural Change Point in ARMA Models via Neural Network Regression and LSCUSUM Methods [PDF]

open access: yesEntropy, 2023
This study considers the change point testing problem in autoregressive moving average (ARMA) (p,q) models through the location and scale-based cumulative sum (LSCUSUM) method combined with neural network regression (NNR).
Xi-hame Ri, Zhanshou Chen, Yan Liang
doaj   +2 more sources

Quantifying the contributions of climate change and human interventions on streamflow alteration in the Hableroud River basin using the hydrological sensitivity analysis approach based on the Budyko hypothesis [PDF]

open access: yesمدل‌سازی و مدیریت آب و خاک, 2023
IntroductionClimate change and human interventions are the most important factors that in combination influence the hydrological response of a watershed system.
Vahedberdi Sheikh   +6 more
doaj   +1 more source

Poisson regression model with change points [PDF]

open access: yesJournal of Applied Research on Industrial Engineering, 2021
There are many different fields the change point analysis arises. In those cases, the main problem is locating the unknown change points. The aim of this study is to detect location and time of change point in Poisson regression model.
Reza Habibi
doaj   +1 more source

Diatom Biogeography, Temporal Dynamics, and Links to Bacterioplankton across Seven Oceanographic Time-Series Sites Spanning the Australian Continent

open access: yesMicroorganisms, 2022
Diatom communities significantly influence ocean primary productivity and carbon cycling, but their spatial and temporal dynamics are highly heterogeneous and are governed by a complex diverse suite of abiotic and biotic factors. We examined the seasonal
Nine Le Reun   +9 more
doaj   +1 more source

Optimal change point detection and localization in sparse dynamic networks [PDF]

open access: yes, 2021
We study the problem of change point localization in dynamic networks models. We assume that we observe a sequence of independent adjacency matrices of the same size, each corresponding to a realization of an unknown inhomogeneous Bernoulli model.
Rinaldo, Alessandro, Wang, Daren, Yu, Yi
core   +1 more source

The UAE Cloud Seeding Program: A Statistical and Physical Evaluation

open access: yesAtmosphere, 2021
Operational cloud seeding programs have been increasingly deployed in several countries to augment natural rainfall amounts, particularly over water-scarce and arid regions.
Taha Al Hosari   +8 more
doaj   +1 more source

Change Point Analysis for Kumaraswamy Distribution

open access: yesMathematics, 2023
The Kumaraswamy distribution is a common type of bounded distribution, which is widely used in agriculture, hydrology, and other fields. In this paper, we use the methods of the likelihood ratio test, modified information criterion, and Schwarz ...
Weizhong Tian   +3 more
doaj   +1 more source

Assessing seasonal variation and trends in rainfall patterns of Madhya Pradesh, Central India

open access: yesJournal of Water and Climate Change, 2023
Climate change is a worldwide problem caused by various anthropogenic activities, leading to changes in hydroclimatic variables like temperature, rainfall, riverine flow, and extreme hydrometeorological events.
Amit Kumar   +5 more
doaj   +1 more source

Dynamical model for social distancing in the U.S. during the COVID-19 epidemic

open access: yesComputational and Mathematical Biophysics, 2020
Background Social distancing has led to a “flattening of the curve” in many states across the U.S. This is part of a novel, massive, global social experiment which has served to mitigate the COVID-19 pandemic in the absence of a vaccine or effective anti-
Chitanvis Shirish M.
doaj   +1 more source

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