机构

• 数学与系统科学研究院 [2]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [3]

内容类型

• 期刊论文 [2]
• 会议论文 [1]

发表日期

• 2015 [1]
• 2010 [1]
• 2006 [1]

学科主题

筛选

浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 An additive-multiplicative rates model for multivariate recurrent events with event categories missing at random 期刊论文  OAI收割 SCIENCE CHINA-MATHEMATICS, 2015, 卷号: 58, 期号: 6, 页码: 1163-1178 作者:  Ye Peng;  Sun LiuQuan;  Zhao XingQiu;  Xu Wei   |  收藏  |  浏览/下载：19/0  |  提交时间：2021/01/14 MULTIPLE IMPUTATION METHODS  COMPETING RISKS MODEL  REGRESSION-COEFFICIENTS  COUNTING-PROCESSES  FAILURE  additive-multiplicative rates model  missing data  multivariate recurrent events  semiparametric model  weighted estimating equation   Least Absolute Relative Error Estimation 期刊论文  OAI收割 JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION, 2010, 卷号: 105, 期号: 491, 页码: 1104-1112 作者:  Chen, Kani;  Guo, Shaojun;  Lin, Yuanyuan;  Ying, Zhiliang   |  收藏  |  浏览/下载：20/0  |  提交时间：2018/07/30 Logarithm transformation  Multiplicative regression model  Random weighting   Fast determination of total ginsenosides content in Ginseng powder by near infrared reflectance spectroscopy (EI CONFERENCE) 会议论文  OAI收割 ICO20: Biomedical Optics, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Chen X.-D.;  Chen X.-D. 收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25 Near infrared (NIR) reflectance spectroscopy was used to develop a fast determination method for total ginsenosides in Ginseng (Panax Ginseng) powder. The spectra were analyzed with multiplicative signal correction (MSC) correlation method. The best correlative spectra region with the total ginsenosides content was 1660 nm1880 nm and 2230nm-2380 nm. The NIR calibration models of ginsenosides were built with multiple linear regression (MLR)  principle component regression (PCR) and partial least squares (PLS) regression respectively. The results showed that the calibration model built with PLS combined with MSC and the optimal spectrum region was the best one. The correlation coefficient and the root mean square error of correction validation (RMSEC) of the best calibration model were 0.98 and 0.15% respectively. The optimal spectrum region for calibration was 1204nm-2014nm. The result suggested that using NIR to rapidly determinate the total ginsenosides content in ginseng powder were feasible.