中国科学院机构知识库网格系统: 检索

Improving near-real-time satellite precipitation products through multistage modified schemes 期刊论文 OAI收割
ATMOSPHERIC RESEARCH, 2023, 卷号: 292, 页码: 106875
作者: Meng, Chengcheng; Mo, Xingguo; Liu, Suxia; Hu, Shi

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收藏 | 浏览/下载：30/0 | 提交时间：2023/08/22

Open-access rainfall datasets Machine learning Statistical methods Precipitation occurrence and intensity Bias correction Data fusion

Reliability of palaeomagnetic poles from sedimentary rocks 期刊论文 OAI收割
GEOPHYSICAL JOURNAL INTERNATIONAL, 2021, 卷号: 225, 期号: 2, 页码: 1281-1303
作者: Vaes, Bram; Li, Shihu; Langereis, Cor G.; van Hinsbergen, Douwe J. J.

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收藏 | 浏览/下载：28/0 | 提交时间：2021/10/19

Palaeomagnetic secular variation Palaeomagnetism Statistical methods Inclination shallowing E/I correction

Simple and cost-effective methods for precise analysis of trace element abundances in geological materials with ICP-MS 期刊论文 OAI收割
SCIENCE BULLETIN, 2017, 卷号: 62, 期号: 4, 页码: 277-289
作者: Chen, Shuo; Wang, Xiaohong; Niu, Yaoling; Sun, Pu; Duan, Meng

收藏 | 浏览/下载：20/0 | 提交时间：2017/04/13

Inductively coupled plasma mass spectrometry High-pressure digestion Oxide and hydroxide interferences Instrumental drift Correction methods Trace elements

Simple and cost-effective methods for precise analysis of trace element abundances in geological materials with ICP-MS CNKI期刊论文 OAI收割
2017
作者: Shuo Chen; Xiaohong Wang; Yaoling Niu; Pu Sun; Meng Duan

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收藏 | 浏览/下载：2/0 | 提交时间：2024/12/18

Inductively coupled plasma mass spectrometry High-pressure digestion Oxide and hydroxide interferences Instrumental drift Correction methods Trace elements

The effects of different calibration and frequency response correction methods on eddy covariance ozone flux measured with a dry chemiluminescence analyzer SCI/SSCI论文 OAI收割
2015
作者: Zhu Z. L.; Zhao, F. H.; Voss, L.; Xu, L. K.

收藏 | 浏览/下载：34/0 | 提交时间：2015/12/09

Ozone flux Eddy covariance Fast-response ozone analyzer Spectral analysis Frequency response correction Calibration methods laser absorption-spectroscopy path co2 analyzers water-vapor carbon-dioxide correlation systems surface fluxes sampling tubes gas analyzer exchange fluctuations

A brightness and color correction method of LED display based on CCD camera (EI CONFERENCE) 会议论文 OAI收割
2012 International Applied Mechanics, MechatronicsAutomation and System Simulation Meeting, AMMASS 2012, June 24, 2012 - June 26, 2012, Hangzhou, China
作者: Wang R.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

The correction methods of LED displays are aiming to address the uniform issues which includes brightness aspect and color aspect. The correction method use a 33 correction coefficients matrix to reshape the pulse width of each LED. To calculate the correction coefficients a linear system is established which includes a color CCD and a LED display. And a correction algorithm is introduced based on the color CCD. This algorithm describes the relationships of the main color components of a LED when the gray level of a LED is increasing or decreasing the three main color components would change according to the correction coefficients. The results shows that the correction based on this algorithm improved the performance of LED displays. (2012) Trans Tech Publications Switzerland.

Correction of the non-uniformity for multi-TDICCD mosaic camera on FPGA (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on E-Product E-Service and E-Entertainment, ICEEE2010, November 7, 2010 - November 9, 2010, Henan, China
Zhu H.; Xue X.; Ma T.; Li H.; Si G.; Guo Y.

收藏 | 浏览/下载：44/0 | 提交时间：2013/03/25

To solve the non-uniformity problem of multi Time Delay Integral Charge Couple Device (TDICCD) mosaic camera several common non-uniformity correction methods are discussed. Secondly a non-uniformity correction algorithm is proposed and implemented on Field-Programmable Gate Array (FPGA) platform. Firstly the correction algorithm is designed. Finally the generation and definition of non-uniformity are introduced considering the fix-point processing ability of FPGA the correction algorithm is optimized properly and implemented on FPGA. The experimental results indicate that the non-uniformity can be decreased from 8.3%to 2.0% in 1s for 3-TDICCD mosaic camera's images with the proposed correction algorithm at 96TDI stage proving that this correction algorithm is of high real-time performance good practicality and satisfies the requirements of the target system. 2010 IEEE.

The research on servo control technology of O-E theodolite based on angular acceleration sensor (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Wei L.; Jin G.; Juan C.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

A new servo control methods for O-E theodolite is presented in this paper. The methods integrates optimally feed forward and feedback control and adopts acceleration delay compensation based on velocity delay compensation then achieves servo control of O-E theodolite effectively. Furthermore Angular acceleration sensor is applied as information resources and adaptive filter is formed to provide with feed forward control signal in the methods. For double closed loop servo control system of O-E theodolite the location correction loop and velocity correction loop are analyzed and designed. Simulation and experimental results show that comparing with traditional methods this servo control methods can improve significantly tracking precision and stability of O-E theodolite. 2010 IEEE.

Non-uniformity correction in multi-CCD imaging system (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Mechanical and Electronics Engineering, ICMEE 2010, August 1, 2010 - August 3, 2010, Kyoto, Japan
Tao M.; Ren J.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The non-uniformity phenomenon exists in each channel of multi-CCD imaging systems. The factors which lead to the problem are complex. The conventional calibrating algorithms can not consider all of these factors and have poor effects. According to the characters of multi-CCD imaging systems a non-uniformity correction method based on the scene was proposed by adopting the traditional two-point correction theories. The correction coefficient of each channel image can be calculated via the linear relation between the two neighboring pixel lines in the two-channel images. Compared with the conventional two-point calibration and multi-point calibration methods contrastive calibrating results were obtained. This method does not need any standard lighted image as reference source which provides a real time way for calibrating the multi-CCD imaging systems in practical applications. 2010 IEEE.

Dynamic data fixing for IR target radiation characteristics (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Lihua C.; Juan C.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The main methods to measure the target IR features are the following two ways: test and then measurement or theoretical and simulation calculation. The former is direct measurement so the results are more accurate but the test is costly and complicated so that it is limited in the application. Theoretical and simulation calculation are widely used in the target IR radiation calibration. Here we give the basic configuration of the calibration platform for measuring the IR radiation of the large area low temperature blackbody source and discuss the calibration flowchart and key technologies for atmospheric transmission correction. The dynamic data are analyzed in real time to determine the IR radiation features in the data fusion subsystem and the experimental results show that the calibration method is feasible and practical. 2010 IEEE.