Zobrazeno 1 - 10
of 836
pro vyhledávání: '"Hirose, Kei"'
Autor:
Kurata, Sumito, Hirose, Kei
In the last two decades, sparse regularization methods such as the LASSO have been applied in various fields. Most of the regularization methods have one or more regularization parameters, and to select the value of the regularization parameter is es
Externí odkaz:
http://arxiv.org/abs/2407.16116
Autor:
Takezawa, Haruki, Hsu, Han, Hirose, Kei, Sakai, Fumiya, Fu, Suyu, Gomi, Hitoshi, Miwa, Shiro, Sakamoto, Naoya
We report the formations of fcc and distorted hcp iron-helium compounds with x in FeHex up to 0.13 and 0.48, respectively, based on experiments at 5-54 GPa and ~1000-2820 K. Upon releasing pressure under room temperature, these fcc and distorted hcp
Externí odkaz:
http://arxiv.org/abs/2405.11810
Fe and FeH form a binary eutectic system above ~40 GPa. Here we performed melting experiments in a laser-heated diamond-anvil cell (DAC) and obtained the Fe-FeH eutectic melting curve between 52 and 175 GPa. Its extrapolation shows the eutectic tempe
Externí odkaz:
http://arxiv.org/abs/2405.09890
Autor:
Yoshida, Wataru, Hirose, Kei
In a regression model, prediction is typically performed after model selection. The large variability in the model selection makes the prediction unstable. Thus, it is essential to reduce the variability in model selection and improve prediction accu
Externí odkaz:
http://arxiv.org/abs/2404.06932
In exploratory factor analysis, model parameters are usually estimated by maximum likelihood method. The maximum likelihood estimate is obtained by solving a complicated multivariate algebraic equation. Since the solution to the equation is usually i
Externí odkaz:
http://arxiv.org/abs/2402.08181
Uranus and Neptune have intrinsic magnetic fields generated via convection in a molten H2O layer, where the field strength is determined by its electrical conductivity (EC) along with convection size and velocity. Previous shock experiments reported
Externí odkaz:
http://arxiv.org/abs/2401.11454
Autor:
Yoshida, Wataru, Hirose, Kei
Publikováno v:
Computational Statistics & Data Analysis 190 (2024)
We consider the problem of forecasting multivariate time series by a Seemingly Unrelated Time Series Equations (SUTSE) model. The SUTSE model usually assumes that error variables are correlated. A crucial issue is that the model estimation requires h
Externí odkaz:
http://arxiv.org/abs/2210.09578
Autor:
Yokoo, Shunpei, Hirose, Kei
Publikováno v:
In Geochimica et Cosmochimica Acta 1 August 2024 378:234-244
