Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Cheng-yi Zhang"'
Publikováno v:
Symmetry, Vol 16, Iss 10, p 1314 (2024)
Under the assumption of missing response data, empirical likelihood inference is studied via composite quantile regression. Firstly, three empirical likelihood ratios of composite quantile regression are given and proved to be asymptotically χ2. Sec
Externí odkaz:
https://doaj.org/article/a9c429683ba749c482eff3c569b60756
Publikováno v:
Mathematics, Vol 12, Iss 4, p 578 (2024)
In this paper, the statistical inference of the partially linear varying coefficient quantile regression model is studied under random missing responses. A two-stage estimation procedure is developed to estimate the parametric and nonparametric compo
Externí odkaz:
https://doaj.org/article/db58a2727a2f4e58bbaf805b6f3b39fd
Publikováno v:
Symmetry, Vol 14, Iss 11, p 2258 (2022)
The construction of confidence intervals is investigated for the partially linear varying coefficient quantile model with missing random responses. Combined with quantile regression, an imputation-based empirical likelihood method is proposed to cons
Externí odkaz:
https://doaj.org/article/884627a52d3a4c46b14c63e66e9e034c
Publikováno v:
Journal of Inequalities and Applications, Vol 2019, Iss 1, Pp 1-11 (2019)
Abstract The paper studies two splitting forms of generalized saddle point matrix to derive two alternate direction iterative schemes for generalized saddle point systems. Some convergence results are established for these two alternate direction ite
Externí odkaz:
https://doaj.org/article/8b9f01edeb0b44a6bcdb9e5bef17c29f
Publikováno v:
Lipids in Health and Disease, Vol 16, Iss 1, Pp 1-14 (2017)
Abstract Background Schisandra, a globally distributed plant, has been widely applied for the treatment of diseases such as hyperlipidemia, fatty liver and obesity in China. In the present work, a rapid resolution liquid chromatography coupled with q
Externí odkaz:
https://doaj.org/article/4974f34600f94eb3b9c47e7bc5ab95f3
Publikováno v:
Journal of Inequalities and Applications, Vol 2017, Iss 1, Pp 1-12 (2017)
Abstract The result on the Geršgorin disc separation from the origin for strictly diagonally dominant matrices and their Schur complements in (Liu and Zhang in SIAM J. Matrix Anal. Appl. 27(3):665-674, 2005) is extended to nonstrictly diagonally dom
Externí odkaz:
https://doaj.org/article/ae61ae11a5a04f72a7a39e8232cd24d2
Publikováno v:
Journal of Inequalities and Applications, Vol 2016, Iss 1, Pp 1-10 (2016)
Abstract Some sufficient conditions are proposed in this paper such that the nonlinear eigenvalue problem with an irreducible singular M-matrix has a unique positive eigenvector. Under these conditions, the Newton-SOR iterative method is proposed for
Externí odkaz:
https://doaj.org/article/e3d7ff8f6f494306bd913035ef59e25e
Publikováno v:
Journal of Inequalities and Applications, Vol 2016, Iss 1, Pp 1-9 (2016)
Abstract Some convergence conditions on successive over-relaxed (SOR) iterative method and symmetric SOR (SSOR) iterative method are proposed for non-Hermitian positive definite linear systems. Some examples are given to demonstrate the results obtai
Externí odkaz:
https://doaj.org/article/1635c6f38fbd486b9355286c4a3306cc
Publikováno v:
Symmetry, Vol 11, Iss 9, p 1065 (2019)
Composite quantile regression (CQR) estimation and inference are studied for varying coefficient models with response data missing at random. Three estimators including the weighted local linear CQR (WLLCQR) estimator, the nonparametric WLLCQR (NWLLC
Externí odkaz:
https://doaj.org/article/1ff7132c0a864fef8285f08a6687d7e5
Publikováno v:
Journal of Applied Mathematics, Vol 2014 (2014)
This paper studies the nonparametric regressive function with missing response data. Three local linear M-estimators with the robustness of local linear regression smoothers are presented such that they have the same asymptotic normality and consiste
Externí odkaz:
https://doaj.org/article/b1728a085e08439aa9f1ca462cf7138b