机构

• 数学与系统科学研究院 [3]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [4]

内容类型

• 期刊论文 [3]
• 会议论文 [1]

发表日期

• 2022 [1]
• 2021 [1]
• 2011 [1]
• 2003 [1]

学科主题

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 DATA-ADAPTIVE EFFICIENT ESTIMATION STRATEGIES FOR BIOMARKER STUDIES EMBEDDED IN RANDOMIZED TRIALS 期刊论文  OAI收割 ANNALS OF APPLIED STATISTICS, 2022, 卷号: 16, 期号: 4, 页码: 2250-2265 作者:  Zhang, Weiz;  Zhang, Zhi wei;  Troendle, James F.;  Liu, Aiyi   |  收藏  |  浏览/下载：25/0  |  提交时间：2023/02/07 Augmentation  precision medicine  semiparametric theory  super learner  two-phase sampling   Group testing can improve the cost-efficiency of prospective-retrospective biomarker studies 期刊论文  OAI收割 BMC MEDICAL RESEARCH METHODOLOGY, 2021, 卷号: 21, 期号: 1, 页码: 10 作者:  Zhang, Wei;  Zhang, Zhiwei;  Krushkal, Julia;  Liu, Aiyi   |  收藏  |  浏览/下载：24/0  |  提交时间：2021/04/26 Biomarker study design  Cost-efficiency  Group testing  Pooling  Two-phase sampling   The angular velocity estimation principal of -- filter based on high sampling rate (EI CONFERENCE) 会议论文  OAI收割 2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China 作者:  Zhang Y. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 In order to get angular velocity of stabilization servo mechanism from angular position sensors  -- filter and its angular velocity transfer function were predigested. Combing with optimum parameters  -- filter based on high sampling rate was established  the effect of and sample rate on filter nature frequency were evaluated. According to the requirements of stabilization platform  the principle of steady and transient tracking filter differential were proved. With the hypothesis of constant acceleration  the frequency characteristics of angular velocity transfer function were analyzed  three-dimensional Kalman filter was simplified  and the filter parameters were designed. The results show that when the spectrum of input signal was lower than 6rad/s  parameters was 0.02  and sampling period were 0.08ms and 0.1ms respectively  the filter can realize differential exactly  when the spectrum was 9rad/s  the precision was no less than 1.1%  the phase leading of angular position was no less than 70  the natural frequency should be higher than the cut-off frequency of stabilization platform was two or three times. In the engineering of electro-optical stabilization servo mechanism  -- filter has properties of tracking differential  and reached the requirement of platform angular velocity estimation. Also it is one of the effective methods to get angular velocity from angular position sensors. 2011 IEEE.   On variance estimation of the ratio estimator under two-phase sampling 期刊论文  OAI收割 STATISTICS, 2003, 卷号: 37, 期号: 1, 页码: 1-16 作者:  Zou, GH;  Li, Y   |  收藏  |  浏览/下载：8/0  |  提交时间：2018/07/30 ratio estimation  superpopulation model  two-phase sampling  variance estimation