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	Improving Human Activity Recognition Performance by Data Fusion and Feature Engineering 期刊论文 OAI收割 SENSORS, 2021, 卷号: 21 作者: Chen, Jingcheng; Sun, Yining; Sun, Shaoming \| 收藏 \| 浏览/下载：35/0 \| 提交时间：2021/04/26 feature selection human activity recognition activity of daily living sensor fusion wearable sensors genetic algorithm coordinate calibration
	Error compensation of laser tracker in multi-station measurement 会议论文 OAI收割 Beijing, China, 2021-06-20 作者: Wang, Ruiyan; She, Wenji \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2022/01/30 laser tracker multi-station measurement error compensation coordinate calibration
	High-precision six-degree-of-freedom pose measurement and grasping system for large-size object based on binocular vision 期刊论文 OAI收割 SENSOR REVIEW, 2020, 页码: 10 作者: Wan, Guoyang; Li, Fudong; Zhu, Wenjun; Wang, Guofeng \| 收藏 \| 浏览/下载：42/0 \| 提交时间：2020/03/30 Industrial robot Binocular vision Coordinate transformation Hand-eye calibration Pose measurement
	Precision Measurement Method of Laser Beams Based on Coordinate Measuring Machine 期刊论文 OAI收割 Ieee Access, 2019, 卷号: 7, 页码: 112736-112741 作者: Y.P.Li; Y.Zhao; Z.Wang; C.Fang; W.Sha \| 收藏 \| 浏览/下载：90/0 \| 提交时间：2020/08/24 Laser beams,measurement,retroreflector,hydroxide-catalysis bonding,coordinate measuring machine,calibration,Computer Science,Engineering,Telecommunications
	Design and calibration of the solar irradiance monitor (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China 作者: Yang D.-J.; Gong C.-H.; Wang Y.-P.; Ye X.; Fang W. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 The solar irradiance monitor (SIM) with the design accuracy of 5 used to monitor the secular changes of the total solar irradiance on FY-3 satellite takes the sun-scanning measurement method on-orbit. Compared to the sun-tracking measurement method this method simplifies the structure and cuts the cost but the measuring accuracy is affected by the sun-synchronous orbit sunlight incidence angle and the installing angle of the SIM in the satellite. Through the ground calibration experiment studies on the affection of different sunlight incidence angles to the measurement accuracy. First by the satellite tool kit (STK) simulation software simulates the orbital parameters of the sun-synchronous satellite and calculates the Sun ascension and declination at any time. By the orbit coordinate transformation matrix gets the components of the Sun vectors to the axes of the satellite and base on the components designs the field of view and the installing angles of the SIM. Then designs and completes the calibration experiment to calibrate the affection of the incidence angles. Selecting 11 different angles between the sunlight and the satellite X-axis measures the total solar irradiance by the SIM at each angle and compares to the irradiances of the SIAR reference radiometers and gets the coefficient curves of the three channels of the SIM. Finally by the quadratic fitting gets the correction equations on the incidence angles: R 1=5.7110-52 -2.45310 -3+1.0302 R2=2.8410-5-1. 96510-3+1.0314 and R3 =1.7210 -52-4.18410-4+0.9946. The equations will aimprove the on-orbit measurement accuracy of the solar irradiance and are very important to the on-orbit data processing after the satellite launched. 2011 SPIE.
	Design of high precision star image locating method used in star sensor technology (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 作者: Sun H.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：55/0 \| 提交时间：2013/03/25 Nowadays star sensor technology used in aircraft attitude measurement has become more and more popular for its high precision light weight without attitude accumulation errors and other advantages. In order to enhance the accuracy of star sensor it is critical to make efforts to promote the precision of star image locating. High precision star image locating method mentioned in this article includes two aspects. One is sub-pixel dividing algorithm used to acquire the coordinate of stars. The other one is imaging calibration method used to weaken the effect caused by imaging distortion. This method is finally realized in some type of star sensor system. Then an experiment is designed to verify the precision of the method. The result of the experiment shows that the precision of the method is 2" in the experimental environment. 2010 IEEE.
	A new high-precision measurement system used in the image calibration of large-sized photographic instrument (EI CONFERENCE) 会议论文 OAI收割 Optical Design and Testing II, November 8, 2004 - November 11, 2004, Beijing, United states 作者: Li Y.; Liu Z.; Li Y.; Li Y.; Li Y. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 The purpose of characterizing the image of large-sized photographic instrument is to make the directionality of three coordinate axises in the three-dimensional coordinate of the image and the directionality of three axises of coordinate in the frame of axes of the instrument keep the same direction. This problem was solved by a high-precision measurement system composed of double-theodolite and a set of communication system. Two cube prisms will be respectively placed on the image surface and the instrument. Every cube prism will stand for a three-dimensional coordinate from the image surface or the instrument. As a result the interdependence of both coordinates from the image surface and the instrument can be obtained by measuring the interdependence of the both cube prisms with autocollimation survey axiom. In the survey system two high-precision stations TDA5005 from Leica Company will be selected as double-theodolite and the interdependence of both coordinates can be achieved by moving the station only at one time. Therefore this measurement system is a high efficient and high-precision surveying method to the image calibration of the large-sized photographic instrument. Based on the experiment its measuring accuracy can reach arc-second level.