中国科学院机构知识库网格系统: 检索

Comprehensive Analyses on the Influential Factors in Supersonic Combustion Simulation Using Dynamic Adaptive Chemistry Method 期刊论文 OAI收割
COMBUSTION SCIENCE AND TECHNOLOGY, 2022, 页码: 29
作者: Wu K(吴坤); Contino, Francesco; Fan XJ(范学军)

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收藏 | 浏览/下载：54/0 | 提交时间：2022/09/27

Dynamic adaptive chemistry mechanism reduction method error threshold search initiating species High-fidelity numerical simulation

Influence Evaluation of Sensor Coordinate Error on Microseismic Source Location 期刊论文 OAI收割
FRONTIERS IN EARTH SCIENCE, 2022, 卷号: 10
作者: Li, Tao; Chen, Bing-Rui; Wang, Qing; Zhu, Xin-Hao; Wang, Xu

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收藏 | 浏览/下载：13/0 | 提交时间：2023/08/02

microseismic sensor coordinate error monitoring area sensor array center threshold comprehensive evaluation index

Real-time BDS signal-in-space anomaly detection method considering receiver anomalies 期刊论文 OAI收割
IET RADAR SONAR AND NAVIGATION, 2019, 卷号: 13, 期号: 12, 页码: 2220-2229
作者: Fan, Lihong; Tu, Rui; Zhang, Rui; Zheng, Zengji; Liu, Jinhai

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收藏 | 浏览/下载：33/0 | 提交时间：2021/11/29

satellite navigation astronomical ephemerides telecommunication network reliability signal detection signal-in-space user range error SIS URE real-time navigation positioning users real-time SIS anomalies location services BeiDou satellites user range accuracy index navigation ephemeris anomaly detection threshold real-time observation data receiver anomalies BeiDou Navigation Satellite System MultiGlobal Navigation Satellite System Experiment precise ephemeris detection results real-time BDS signal-in-space anomaly detection method IURE international GNSS Monitoring & Assessment System

开放式数字印刷控制系统中的关键技术研究 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2014
作者: 胡建华

收藏 | 浏览/下载：74/0 | 提交时间：2015/09/02

开放式大幅面多通道数字印刷控制系统阈值噪声调制误差扩散高实时性数字印刷传输协议 Large format multi-channel open digital printing control system Threshold noise modulation Error diffusion High real-time performance digital printing transmission protocol

Relaxation Property and Stability Analysis of the Quasispecies Models 期刊论文 OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2009, 卷号: 52, 页码: 726-734
作者: Fegn Xiao-Li; Li Yu-Xiao; Gu Jian-Zhong; Zhuo Yi-Zhong

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收藏 | 浏览/下载：26/0 | 提交时间：2018/07/16

relaxation time critical exponent error threshold

Relaxation Property and Stability Analysis of the Quasispecies Models 期刊论文 OAI收割
COMMUNICATIONS IN THEORETICAL PHYSICS, 2009, 卷号: 52, 期号: 4, 页码: 726-734
Fegn XiaoLi; Li YuXiao; Gu JianZhong; Zhuo YiZhong

收藏 | 浏览/下载：39/0 | 提交时间：2013/12/25

relaxation time critical exponent error threshold

Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65 enhanced chromaticity uniformity of illumination field.

Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文 OAI收割
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED then achieved chroma coordinates error between the compounded white light and standard white light D65 until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65 enhanced chroma uniformity of illumination field.

Affine object recognition and affine parameters estimation based on covariant matrix (EI CONFERENCE) 会议论文 OAI收割
2008 International Symposium on Information Science and Engineering, ISISE 2008, December 20, 2008 - December 22, 2008, Shanghai, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：136/0 | 提交时间：2013/03/25

A new method of affine object recognition and affine parameters estimation is presented. For a real-time image and a group of templates in addition firstly on the basis of correct recognition we segment the object regions in them and compute their covariant matrices. Secondly it can estimate affine parameters exactly normalize the ellipse regions defined by covariant matrices to circle regions to get rotational invariants and the estimated error is within 3%. 2008 IEEE. and compute the similarity function value between rotational invariants of real-time image and every template respectively. Then compare the values with threshold set in advance if more than one value is larger than threshold take the corresponding templates as candidates and compute affine matrix between real-time image and every candidate. Finally transform the realtime image with every affine matrix and match the result with corresponding candidate by classical matching methods. Experimental results show that the presented method is robust to illumination with low computational complexity and it can realize recognition of different affine objects

Remote chlorophyll-a retrieval in eutrophic inland waters by concentration classification Taihu Lake case study 会议论文 OAI收割
International Conference on Earth Observation Data Processing and Analysis, ICEODPA,, Wuhan, China, December 28, 2008 - December 30,2008
Du, Cong; Wang, Shixin; Zhou, Yi; Yan, Fuli

收藏 | 浏览/下载：33/0 | 提交时间：2014/12/07

In order to improve the precision of phytoplankton chlorophyll-a (chla) concentration retrieval this study classified the data into two groups (the high and the low) by chla concentration with the threshold of 50gA&bullL-1. And then build the statistical models for each group. Particularly a modifying factor OSS/TSS was used to unmixing the spectra in the low model to improve the low relationship between spectral reflectance and chla concentrations. As a result the concentration classification model allowed estimation of chla with a root mean square error (RMSE) of 21.12gA&bullL-1 and the determination coefficient (R2) was 0.92 comparing with RMSE of chla estimation was 35.72gA&bullL-1 and R2=0.72 in the traditional model. It shows that concentration classification is a helpful method for accurate remote chla retrieval in eutrophic inland waters. 2008 SPIE.