Zobrazeno 1 - 10
of 336
pro vyhledávání: '"subsample"'
Autor:
潘素娟(PAN Sujuan), 丁杰(DING Jie)
Publikováno v:
Zhejiang Daxue xuebao. Lixue ban, Vol 51, Iss 4, Pp 459-471 (2024)
In order to explore the different preferences between retail investors and professional investors, this paper constructs the index of retail investors' preference based on the shareholding ratio of institutional investors and a series of stock charac
Externí odkaz:
https://doaj.org/article/dd90bc3a5e28407c807e71dad7eca597
Autor:
Nilcan Mert, Mustafa Caner Timur
Publikováno v:
Quantitative Finance and Economics, Vol 7, Iss 2, Pp 229-248 (2023)
Bitcoin has become quite known after the 2008 economic crisis and the COVID-19 health crisis. For some, these cryptocurrencies constitute rebellion against the existing system as governments encourage uncontrolled expansions in the money supply; for
Externí odkaz:
https://doaj.org/article/a056b9a799db46ed8ac6fed9d42b0f2f
Publikováno v:
Energy Reports, Vol 8, Iss , Pp 87-94 (2022)
The resolution of a digital core image obtained by CT scanning is inversely proportional to the core size. The sample size of the core plunger is large; therefore, the core image has low-resolution and loses microstructure information, which is diffi
Externí odkaz:
https://doaj.org/article/b945db5d171644b0b8ab5ecc88b48806
Publikováno v:
Agricultural Economics (AGRICECON), Vol 68, Iss 6, Pp 219-229 (2022)
This paper constructs a minimum-variance portfolio of six agricultural futures. We make a full sample analysis as well as a pre-COVID and COVID examination. Using Markowitz portfolio optimisation, we find that soybean futures have the highest share (
Externí odkaz:
https://doaj.org/article/657c91f630ce4e3eb7b6ce7e8d912485
Autor:
Shizhuang Weng, Junjie Ma, Wentao Tao, Yujian Tan, Meijing Pan, Zixi Zhang, Linsheng Huang, Ling Zheng, Jinling Zhao
Publikováno v:
Frontiers in Plant Science, Vol 14 (2023)
Drought stress (DS) is one of the most frequently occurring stresses in tomato plants. Detecting tomato plant DS is vital for optimizing irrigation and improving fruit quality. In this study, a DS identification method using the multi-features of hyp
Externí odkaz:
https://doaj.org/article/4c970dce1c43470a9d89ea0744a3b888
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Srisunee Wuthiwongtyohtin
Publikováno v:
Journal of Water and Climate Change, Vol 12, Iss 5, Pp 1631-1653 (2021)
This study aims to investigate different statistical bias correction techniques to improve the output of a regional climate model (RCM) of daily rainfall for the upper Ping River Basin in Northern Thailand. Three subsamples are used for each bias cor
Externí odkaz:
https://doaj.org/article/de993e80e1094277a8c6afd400c19ac2
Publikováno v:
Jisuanji kexue yu tansuo, Vol 14, Iss 11, Pp 1943-1955 (2020)
In view of the difficulty of noise removal in color images, according to the unique color separation charac-teristics of HSI space, the noise removal of color image polluted by high noise is studied. Firstly, the color image is projected into the HSI
Externí odkaz:
https://doaj.org/article/a66facdd5eac4f4899196282f306d724
Publikováno v:
Frontiers in Public Health, Vol 9 (2022)
This paper aims to explore the impact of social medical insurance (SMI) on poverty reduction (PR) in China. Considering the time-varying characteristics of factors, this paper uses the bootstrap Granger full sample causality and subsample rolling win
Externí odkaz:
https://doaj.org/article/e6502c7ed8c04fa79af6138ef40d04e5
Publikováno v:
Brain Sciences, Vol 13, Iss 1, p 21 (2022)
Features extracted from the wavelet transform coefficient matrix are widely used in the design of machine learning models to classify event-related potential (ERP) and electroencephalography (EEG) signals in a wide range of brain activity research an
Externí odkaz:
https://doaj.org/article/4a1e1305f33a4a1fbb1094a1de18db76