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Tweet Analysis for Enhancement of COVID-19 Epidemic Simulation: A Case Study in Japan

open access: yesFrontiers in Public Health, 2022
The COVID-19 pandemic, which began in December 2019, progressed in a complicated manner and thus caused problems worldwide. Seeking clues to the reasons for the complicated progression is necessary but challenging in the fight against the pandemic.
Vu Tran, Tomoko Matsui, Tomoko Matsui
doaj   +1 more source

The Spillover Effect among CET Market, Coal Market, and New Energy Market for Dual-Carbon Target: New Evidence from China

open access: yesDiscrete Dynamics in Nature and Society, 2023
The spillover effect of the energy markets and the CET plays an important role in guiding the realization of two-carbon target; using the network spillover methodology of Diebold, Yilmaz, Jozef Barunı´k, and Toma´sKrehlı´k, we examine both the static and
Feng-Wei Gao   +3 more
doaj   +1 more source

Statistical Analysis of Networks [PDF]

open access: yes, 2022
This book is a general introduction to the statistical analysis of networks, and can serve both as a research monograph and as a textbook. Numerous fundamental tools and concepts needed for the analysis of networks are presented, such as network modeling, community detection, graph-based semi-supervised learning and sampling in networks.
Avrachenkov, Konstantin   +1 more
openaire   +2 more sources

COVID-19 case prediction using emotion trends via Twitter emoji analysis: A case study in Japan

open access: yesFrontiers in Public Health, 2023
IntroductionThe worldwide COVID-19 pandemic, which began in December 2019 and has lasted for almost 3 years now, has undergone many changes and has changed public perceptions and attitudes.
Vu Tran, Tomoko Matsui, Tomoko Matsui
doaj   +1 more source

Bayesian Joint Modeling Analysis of Longitudinal Proportional and Survival Data

open access: yesMathematics, 2023
This paper focuses on a joint model to analyze longitudinal proportional and survival data. We utilize a logit transformation on the longitudinal proportional data and employ a partially linear mixed-effect model. With this model, we estimate the unknown
Wenting Liu   +3 more
doaj   +1 more source

A Statistical Analysis of Cryptocurrencies [PDF]

open access: yesJournal of Risk and Financial Management, 2017
We analyze statistical properties of the largest cryptocurrencies (determined by market capitalization), of which Bitcoin is the most prominent example. We characterize their exchange rates versus the U.S. Dollar by fitting parametric distributions to them.
Stephen Chan   +3 more
openaire   +5 more sources

High-Dimensional Variable Selection for Quantile Regression Based on Variational Bayesian Method

open access: yesMathematics, 2023
The quantile regression model is widely used in variable relationship research of moderate sized data, due to its strong robustness and more comprehensive description of response variable characteristics.
Dengluan Dai, Anmin Tang, Jinli Ye
doaj   +1 more source

Non-Parametric Non-Inferiority Assessment in a Three-Arm Trial with Non-Ignorable Missing Data

open access: yesMathematics, 2023
A three-arm non-inferiority trial including a placebo is usually utilized to assess the non-inferiority of an experimental treatment to a reference treatment.
Wei Li, Yunqi Zhang, Niansheng Tang
doaj   +1 more source

Methods of Statistical Analysis [PDF]

open access: yesSoil Science, 1938
Includes bibliographies. ; Mode of access: Internet.
P. R. Rider, C. H. Goulden
openaire   +3 more sources

Diagnosis of thyroid nodules for ultrasonographic characteristics indicative of malignancy using random forest

open access: yesBioData Mining, 2020
Background Various combinations of ultrasonographic (US) characteristics are increasingly utilized to classify thyroid nodules. But they lack theories, and heavily depend on radiologists’ experience, and cannot correctly classify thyroid nodules.
Dan Chen   +5 more
doaj   +1 more source

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