中国科学院机构知识库网格系统: 检索

Retrieval of Global Carbon Dioxide From TanSat Satellite and Comprehensive Validation With TCCON Measurements and Satellite Observations 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2022, 卷号: 60
作者: Hong, Xinhua; Zhang, Peng; Bi, Yanmeng; Liu, Cheng; Sun, Youwen

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收藏 | 浏览/下载：59/0 | 提交时间：2022/02/14

Satellites Extraterrestrial measurements Absorption Clouds Instruments Carbon dioxide Atmospheric measurements CO2 Iterative Maximum < italic xmlns:ali="http: www niso org schemas ali 1 0 " xmlns:mml="http: www w3 org 1998 Math MathML" xmlns:xlink="http: www w3 org 1999 xlink" xmlns:xsi="http: www w3 org 2001 XMLSchema-instance"> A Posteriori < italic > Differential Optical Absorption Spectroscopy (IMAP-DOAS) remote sensing satellites spectral analysis TanSat Xc?2

The function of blast furnace dust as reductant on simultaneous reduction of high-phosphorus oolitic hematite 期刊论文 OAI收割
IRONMAKING & STEELMAKING, 2020, 卷号: 47, 期号: 5, 页码: 520-530
作者: Cao, Yun-ye; Duan, Dong-ping; Zhou, E.; Sun, Ti-chang

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收藏 | 浏览/下载：23/0 | 提交时间：2020/09/22

Blast furnace dust high-phosphorus oolitic hematite simultaneous reduction coal

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Markov Boundary Discovery Based on Variant Ridge Regularized Linear Models 期刊论文 OAI收割
IEEE ACCESS, 2019, 卷号: 7
作者: Yan, Shu; Cui, Chaoyuan; Sun, Bingyu; Wang, Rujing

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收藏 | 浏览/下载：34/0 | 提交时间：2020/10/27

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New Evidence on Causal Relationship between Approximate Number System (ANS) Acuity and Arithmetic Ability in Elementary-School Students: A Longitudinal Cross-Lagged Analysis 期刊论文 OAI收割
FRONTIERS IN PSYCHOLOGY, 2016, 卷号: 7, 期号: 26, 页码: 1052
作者: He, Yunfeng; Zhou, Xinlin; Shi, Dexin; Song, Hairong; Zhang, Hui

收藏 | 浏览/下载：22/0 | 提交时间：2016/09/05

approximate number system math performance arithmetic ability elementary-school students cross-lagged analysis longitudinal study

Can One-to-One Computing Narrow the Digital Divide and the Educational Gap in China? The Case of Beijing Migrant Schools SCI/SSCI论文 OAI收割
2013
Mo D.; Swinnen J.; Zhang L. X.; Yi H. M.; Qu Q. H.; Boswell M.; Rozelle S.

收藏 | 浏览/下载：52/0 | 提交时间：2014/12/24

One Laptop Per Child RCT Asia China Beijing migrant school computer skills math test scores class-size performance market

The etiology of mathematical self-evaluation and mathematics achievement: Understanding the relationship using a cross-lagged twin study from ages 9 to 12 期刊论文 OAI收割
LEARNING AND INDIVIDUAL DIFFERENCES, 2011, 卷号: 21, 期号: 6, 页码: 710-718
作者: Luo, Yu L. L.; Kovas, Yulia; Haworth, Claire M. A.; Plomin, Robert

收藏 | 浏览/下载：23/0 | 提交时间：2015/09/16

Self-evaluation Math achievement Cross-lagged association Twins

生物自发荧光三维断层成像方法研究 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, 2011
作者: 刘凯

收藏 | 浏览/下载：92/0 | 提交时间：2015/09/02

分子影像光学成像生物自发荧光断层成像前向数理模型重建算法逆问题高阶近似模型多模态融合 molecular imaging optical imaging bioluminescence tomography forward math-physical model reconstruction algorithm inverse problem higher-order approximation model multimodality fusion

Analysis of zenith pass problem in a roll-pitch optics seeker (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
作者: Jiang H.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

There are mainly two kind of structures for a missile two-axes seeker which is always mentioned as elevate-azimuth and roll-pitch. The elevate-azimuth structured seeker has been studied for a long time and it is applied in all sort of missiles. Not only structure design but also control algorithm of the elevate-azimuth seeker are deeply developed. But for elevate-azimuth seeker there are several disadvantages such as big size and large abaxial angle blind. So the elevate-azimuth seeker gimbal angle is designed up to 65 according to relative references. In modern air war it is important for a missile to have the ability of "first recognize" and "first attack". That means the air to air missile seeker is required to be a system with large gimbal angle and large abaxial launch angle. With the mentioned requirement roll-pitch seeker with its advantages smart size and large gimbal angle is studied widely and deeply. The pitch angle of roll-pitch is up to 90 while its roll angle up to n 360. But there are also some disadvantages for the roll-pitch seeker the most troublesome one is the zenith pass problem. The zenith pass problem is brought about from the gimbal kinematics it is said that when target moves in the center of image plane roll servo command gotten from the kinematics algorithm will go to infinite. Math model of zenith pass problem is proposed in this paper and two ways to solve the problem are brought forward. 2011 IEEE.

Modeling and analysis of dialyte-lens auto-focusing technology for theodolite (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Wu L.-T.; Qiao Y.-F.; Wu D.-K.; Cai S.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

In order to realize real-time auto-focusing for theodolite lens-apart method was designed with the corresponding math model built and analyzed. An Object beam splitted after the first image surface of the theodolite traveled through two dialyte lens and then was imaged on CCD. The distance between two spots when exactly focused was set as the calibration value and the relationship between defocus distance and spot offset was given. The influence of tracking center shift and divergence angle etc. on focusing accuracy was analyzed. Compared with the traditional focusing method this scheme has a higher accuracy faster calculation higher tolerance for environment temperature and a simpler construction. The experiment result exhibited a resolution higher than 0.056mm which shows a bright engineering application prospect for this method. 2009 SPIE.

Three-dimensional angle measurement based on auto-collimation and moire fringe (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Cai S.; Liang S.; Qiao Y.-F.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

A method for small three-dimensional (3D) angle measurement based on auto-collimation and moire fringe is proposed and analyzed. A right-angle prism is used as the indicator of angle change. The inclined plane indicates the pitch and yaw angles and roll angle in indicated by the rib which is the intersection of two right-angle sides. Pitch and yaw angles measurement are implemented by auto-collimation based on reticule and roll angle measurement is measured based on moire fringe. Roll angle measurement is separated from pitch and yaw by using two light sources with different frequencies. Any small change of pitch and roll angles will induce the shift of the reticule image after reflecting by inclined plane. And any small roll angle will induce a change in moire fringe width that is generated by scale grating image which is reflected by the prism and index grating. The math model of this method is built up and error analysis is presented. The theoretical calculation results show that the proposed method is feasible and can achieve high accuracy. 2009 SPIE.