中国科学院机构知识库网格系统: 检索

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

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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

Drill the Cork of Information Bottleneck by Inputting the Most Important Data 期刊论文 OAI收割
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS, 2021, 页码: 13
作者: Peng, Xinyu; Zhang, Jiawei; Wang, Fei-Yue; Li, Li

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收藏 | 浏览/下载：14/0 | 提交时间：2022/01/27

Training Signal to noise ratio Mutual information Optimization Convergence Deep learning Tools Information bottleneck (IB) theory machine learning minibatch stochastic gradient descent (SGD) typicality sampling

The influence of CCD undersampling on the encircled energy of SVOM-VT 会议论文 OAI收割
Beijing, China, 2019-07-07
作者: Xue, Xun; Zhang, Chunmin; Zhao, Jianke; Zhou, Yan; Liu, Shangkuo

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收藏 | 浏览/下载：27/0 | 提交时间：2020/03/04

Encircled energy Sampling theory Undersampling CCD

The error analysis of automated biochemical analyzer (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Computing, Information and Control, ICCIC 2011, September 17, 2011 - September 18, 2011, Wuhan, China
Qinghai C.; Yihui W.; Haiwen L.; Peng H.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

In order to find out the relationships between the four error sources namely locating error optics system fluctuations sampling error and temperature fluctuations and the accuracy of the instrument we analyzed each relationship of them and found that the effect of locating error is so tiny that it can be ignored finally established the total error model and the model of the allowed noise of the optics system of the instrument. Analysis and the models may supply a reliable theory evidence for the improvement of the instrument and the designing of similar instruments. 2011 Springer-Verlag.

A design of beam shaping unit for 193nm lithography illumination system using angular spectrum theory (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Zhao Y.; Zhang W.; Zhang W.; Li S.; Gong Y.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

Off-axis illumination (OAI) technology is widely used to enhance resolution for deep ultraviolet lithography. The realizing methods of OAI include geometrical optics method and physical optics method. However the former has the disadvantage of weak intensity distribution controlling ability and the latter introduces simulation errors evidently when dealing with near field diffraction propagation. A diffractive optical element (DOE) designing method using plane wave angular spectrum theory is presented in this paper. Several kinds of OAI modes at near field away from DOE can be realized and simulation errors and the size of illuminator are also reduced. According to studying the relationships of the sampling point distance of DOE light beam propagation distance and the structure of the beam shaping unit a method of determining the designing parameters is discussed. Using this method several illumination modes are realized and simulation results show that all diffraction efficiencies reach up to 84%. The method of DOE manufacturing is analyzed at last and it is proven to be feasible. 2010 SPIE.

Global temperature stationary planetary waves extending from 20 to 120 km observed by TIMED/SABER 期刊论文 OAI收割
Journal of Geophysical Research-Atmospheres, 2009, 卷号: 114, 页码: D17101
Xiao, C. Y.; Hu, X.; Tian, J. H.

收藏 | 浏览/下载：33/0 | 提交时间：2014/04/30

mean-flow interaction asynoptic satellite-observations mesosphere-lower thermosphere interannual variability gravity-waves southern-hemisphere middle atmosphere sampling theory wind model stratosphere

Geographic Information System Data Sampling Design and Implementation 会议论文 OAI收割
Proceedings of SPIE-The International Society for Optical Engineering
Jiang C. S.; Wang J. F.; Hu M. G.; Li L. F.; Cao Z. D.

收藏 | 浏览/下载：110/0 | 提交时间：2012/06/30

Sampling theory Sampling Software Sandwich sampling Spatial sampling GIS gis soil

Adaptive sliding mode control for airborne Opto-Electronic platform servo system (EI CONFERENCE) 会议论文 OAI收割
7th International Conference on Machine Learning and Cybernetics, ICMLC, July 12, 2008 - July 15, 2008, Kunming, China
Wang C.-X.; Liu J.-H.; Shen H.-H.; Dai M.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

The novel presents an adaptive reaching law sliding mode controller to slove a class of uncertain systems.The Airborne Opto-Electronic Platform sliding model is employed to represent a class of complex uncertain system. The control is based on reaching law control. Discrete time implementation of the sliding mode control strategy is considered in the paper since it is more appropriate for practical applications. It is shown that the robustness of the sliding mode control method is constrained by sampling time. Design of the adaptive reaching law based on a discrete expotential reaching law concept is given which to design a new sliding mode controller based on Lyapunov stability theory. The global asymptotic stability is guaranteed. An example with simulation results is given to illustrate the effectiveness of the proposed method. 2008 IEEE.

Research on the affect of differential-images technique to the resolution of infrared spatial camera (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, July 8, 2007 - July 12, 2007, Chengdu, China
Jin G.; An Y.; Qi Y.; Hu F.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

The optical system of infrared spatial camera adopts bigger relative aperture and bigger pixel size on focal plane element. These make the system have bulky volume and low resolution. The potential of the optical systems can not be exerted adequately. So one method for improving resolution of infrared spatial camera based on multi-frame difference-images is introduced in the dissertation. The method uses more than one detectors to acquire several difference images and then reconstructs a new high-resolution image from these images through the relationship of pixel grey value. The technique of difference-images that uses more than two detectors is researched and it can improve the resolution 2.5 times in theory. The relationship of pixel grey value between low-resolution difference-images and high-resolution image is found by analyzing the energy of CCD sampling a general relationship between the enhanced times of the resolution of the detected figure with differential method and the least count of CCD that will be used to detect figure is given. Based on the research of theory the implementation process of utilizing difference-images technique to improve the resolution of the figure was simulated used Matlab software by taking a personality image as the object and the software can output the result as an image. The result gotten from the works we have finished proves that the technique is available in high-resolution image reconstruction. The resolution of infrared spatial camera can be improved evidently when holding the size of optical structure or using big size detector by applying for difference image technique. So the technique has a high value in optical remote fields.

三维几何建模中的曲面重建与简化研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2003
作者: 高山

收藏 | 浏览/下载：59/0 | 提交时间：2015/09/02

三维几何建模曲面重建采样理论网格简化 3D geometric modeling surface reconstruction sampling theory mesh simplificaiton