中国科学院机构知识库网格系统: 检索

A Novel Adaptive Noise Covariance Matrix Estimation and Filtering Method: Application to Multiobject Tracking 期刊论文 OAI收割
IEEE TRANSACTIONS ON INTELLIGENT VEHICLES, 2024, 卷号: 9
作者: Jiang, Chao; Wang, Zhiling; Liang, Huawei; Wang, Yajun

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收藏 | 浏览/下载：13/0 | 提交时间：2024/11/20

Covariance matrices Noise measurement Estimation Correlation Filtering Calibration Technological innovation Kalman filtering adaptive estimation process and measurement noise covariance matrices multiobject tracking

Precise calibration of cavity forward and reflected signals using low-level radio-frequency system 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2022, 卷号: 33, 期号: 1, 页码: 9
作者: Ma, Jin-Ying; Qiu, Feng; Shi, Long-Bo; Zhu, Zheng-Long; Jiang, Tian-Cai

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收藏 | 浏览/下载：76/0 | 提交时间：2022/04/11

Forward and reflected signals Measurement Calibration

Independent Validation of Jason-2/3 and HY-2B Microwave Radiometers Using Chinese Coastal GNSS 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2021, 页码: 11
作者: Zhu, Lin; Yang, Lei; Xu, Yongsheng; Zhang, Huayi; Wu, Zhilu

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收藏 | 浏览/下载：32/0 | 提交时间：2022/02/18

Global navigation satellite system Radiometers Sea measurements Satellite broadcasting Microwave radiometry Oceans Microwave measurement Calibration and validation Crustal Movement Observation Network of China (CMONOC) global navigation satellite system (GNSS) wet path delay (WPD) microwave radiometer satellite altimetry

Train probe for beam diagnostics of the SC200 superconducting cyclotron 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2020, 卷号: 31
作者: Hu, Le-Xing; Ding, Kai-Zhong; Song, Yun-Tao; Wu, Yu-Cheng; Yao, Kai

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收藏 | 浏览/下载：79/0 | 提交时间：2020/11/30

Train probe Beam diagnostic Cyclotron Measurement and calibration Commissioning

Precision Work-piece Detection and Measurement Combining Top-down and Bottom-up Saliency 期刊论文 OAI收割
International Journal of Automation and Computing, 2018, 卷号: 15, 期号: 4, 页码: 417-430
作者: Jia Sun; Peng Wang; Yong-Kang Luo; Gao-Ming Hao; Hong Qiao

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收藏 | 浏览/下载：19/0 | 提交时间：2021/02/23

Work-pieces detection salient region estimation top-down and bottom-up saliency (TBS) calibration visual measurement.

A digital wide range neutron flux measuring system for HL-2A 期刊论文 OAI收割
PLASMA SCIENCE & TECHNOLOGY, 2017, 卷号: 19, 期号: 8
作者: Yuan Chen; Wu Jun; Yin Zejie

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收藏 | 浏览/下载：26/0 | 提交时间：2021/12/13

FUSION TEST REACTOR ABSOLUTE CALIBRATION MONITORING-SYSTEM TOKAMAK ITER SPECTROSCOPY YIELDS TFTR EAST HL-2A plasma diagnosis neutron flux measurement signal collection and treatment

Design of the real-time autofocusing system for collimator with long focus length and large aperture (EI CONFERENCE) 会议论文 OAI收割
2011 International Academic Conference on Numbers, Intelligence, Manufacturing Technology and Machinery Automation, MAMT 2011, December 24, 2011 - December 25, 2011, Wuhan, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：47/0 | 提交时间：2013/03/25

Large aperture collimator which has been widely used for calibrating and testing various optical devices plays an essential role in correlative laboratories. As being the basic testing and calibration equipment the large aperture collimator's accuracy should be much higher than the device under testing in order to ensure the accuracy of the measurement. However the process of adjusting the collimator is extremely complicated due to the collimator's large aperture and long focal length. So it is difficult to ensure the measurement's quality and easy to cause the system being vulnerable to the surrounding environment. One of the most common problems is defocus. In order to solve the problem above this issue presents a new type of autocollimator autofocusing system which uses pentaprism instead of using large-aperture plane mirror semiconductor lasers as light source and CCD sensor as receiver. The system is smaller lighter and more convenient when using. The computer simulation shows that the autofocusing system's resolution could reach the accuracy of 40m. If we use the relevant algorithms to execute the sub-pixel scanning the resolution could reach the accuracy of 10m. It shows that the system could satisfy the required testing precision of testing large aperture optical device.

A sub-pixel extraction method for the center of the circular structure from spot array calibration target (EI CONFERENCE) 会议论文 OAI收割
2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China
作者: Liu Y.; Zhang T.; Yang H.; Gao X.; Liu Y.

收藏 | 浏览/下载：79/0 | 提交时间：2013/03/25

The imaging measurement system must be calibrated before application. In calibration procedure sub-pixel center extraction is the crucial step for the final accuracy. In this paper a new sub-pixel extraction method is proposed. Edge detection at pixel level is obtained using LOG operator then sub-pixel edge detection is realized using the Facet model. Finally the least squares ellipse fitting is operated on the sub-pixel edge to determine the sub-pixel center. Experiment on a series of simulated images indicates that this algorithm is able to realize the center location accuracy of 0.01-0.02 pixel and meets the requirement of sub-pixel level. (2012) Trans Tech Publications Switzerland.

Reagentless near-infrared determination of cholesterol in undiluted human serum using interval partial least square (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Smart Materials and Nanotechnology in Engineering, SMNE 2011, September 17, 2011 - September 18, 2011, Wuhan, China
Gao H.; Lu Q.; Huang F.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

In order to determination of cholesterol in human serum with no reagent using nearinfrared (NIR) spectroscopy. Interval partial least square (iPLS) was proposed as an effective variable selection approach for multivariate calibration. For this purpose an independent sample set was employed to evaluate the prediction ability of the resulting model. The spectrum was split into different interval. Then the informative region of cholesterol (1688-1760nm) in which the PLS model has a low RMSEP with 0.241mmol/L and a high R with 0.975 is selected with 23 intervals. The results indicate that the informative region of cholesterol can be obtained by iPLS and applied to design the simpler reagentless NIR instruments for inexpensive cholesterol measurement in future. (2012) Trans Tech Publications Switzerland.

Performance test of steel tube enclosed thermistors in air temperature measurements (EI CONFERENCE) 会议论文 OAI收割
3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China
作者: Yang H.; Yan F.; Yan F.; Peng J.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

The performances of two steel tube enclosed precision thermistors are tested in a well controlled air environment to determine if the thermistors have enough accuracy for 0.01C levels of air temperature gradient measurement. Three Fluke's 5641 and three 5610 thermistors were tested for 24 hours in Fluke's 7008 calibration bath in the first step. In the second step the performances of these two thermistors in steady state and transient state air temperature environments were tested for 8 hours separately. The results illustrate that two of the 5641s were airproofed in a temperature well controlled tube when steel tube enclosed precision thermistors are used in air temperature measurement there are unstable departures from each other with a maximum 8.8 mC in constant air medium and 27 mC in temperature changing air medium. The transient-time errors are too large to show the true amounts of temperature changes for air temperature measurement. 2011 IEEE.