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	Physical mechanism-based simulation methods for soil and ground heat flux from observations at multi-sites 期刊论文 OAI收割 JOURNAL OF HYDROLOGY, 2024, 卷号: 645, 页码: 132168 作者: Liu, Zhaofei; Jiang, Dong; Wang, Rui; Hao, Mengmeng; Zhang, Xingxing \| 收藏 \| 浏览/下载：14/0 \| 提交时间：2024/12/20 Ground heat flux Soil heat flux Simulation Gradient method Calorimetry method Triple collocation Tibetan Plateau
	The Ground Simulation of Spacecraft Discharge Impacts on the Space Environment Detectors 期刊论文 OAI收割 IEEE TRANSACTIONS ON PLASMA SCIENCE, 2016, 卷号: 44, 期号: 7, 页码: 1247-1253 作者: Wang, Jinlong; Zhang, Zhenlong 收藏 \| 浏览/下载：25/0 \| 提交时间：2016/11/08 Ground simulation method mitigation method space environment detector spacecraft charge and discharge
	LED display image correction based on computer simulation (EI CONFERENCE) 会议论文 OAI收割 2012 International Applied Mechanics, Mechatronics Automation Symposium, IAMMAS 2012, September 7, 2012 - September 9, 2012, Shenyang, Liaoning, China Zheng X.-F.; Chang F. 收藏 \| 浏览/下载：28/0 \| 提交时间：2013/03/25 For the purposes of correcting the LED display image a method based on computer simulation is proposed. First the development of the LED display panel is introduced. Second analyze the causes of the problem which image in LED display panel has serious high nonuniformity and introduce the existed correction techniques which are used to reduce the nonuniformity of LED display image. Simultaneously point out the ground for shortcomings of these techniques. Third describe the principle of correction method based on computer simulation detail from two steps which are the luminous collection and luminous copulation. Forth describe the realization steps of this method in accordance with the third step. Finally this method is supplied in a LED display panel whose resolution is 640480. Experimental results show that this method is able to reduce the non-uniformity of images from 11.06% to 0.98%. (2012) Trans Tech Publications Switzerland.
	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：36/0 \| 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 and analysis of auto-focus assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China 作者: Chen W.; Gao X. 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/03/25 Spaceborne remote sensing camera may be out of focus when the environment and photographic distance changes. In order to get higher ground sampled distance for the camera based on the experience gained from the development of a remote sensing camera working principle of auto-focus assembly control system was discussed. Time of waveform extraction was reduced. It sets force an auto-focus assembly that uses cam and line guide rail in order to move the lens group. The motion error of the auto-focus assembly was difficult to be eliminated and would affect on the focusing accuracy of the spaceborne remote sensing camera directly. So it was analyzed at both ends of the focusing structure. The CCD detector can keep stable when the remote sensing camera is imaging. The motion error was tested to verify the validity of the simulation result and it is less than 0.01mm. Its accuracy meets using demand. The focusing method of moving focal plane is suitable for spaceborne remote sensing camera. 2011 IEEE.
	Design and analysis of Roll-Swing imaging seeker scan scheme (EI CONFERENCE) 会议论文 OAI收割 2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China Bai Y.; Liu B.; Jia H.; Guo L. 收藏 \| 浏览/下载：25/0 \| 提交时间：2013/03/25 To achieve an optimum scan area and target stay time for Roll-Swing imaging seeker the scanning process is analyzed. The method of ground imaging area calculation is proposed in this paper. A kind of Roll-Swing imaging frame mechanism is introduced. The flight process simulation base on real flight data is realized. According to imaging sensor parameters and flight data a new scan scheme method is proposed and a new scan scheme is designed. The new scan scheme is compared to traditional scan scheme from different guide lines. The test results indicate that the new scan scheme satisfy requirement of the real flight experiment. 2010 IEEE.
	Modeling of satellite borne TDI CCD pitching imaging image motion velocity vector (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China 作者: Zhang L.; Li S.; Zhang L. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 In order to obtain three-dimensional observation effect with single satellite borne time delay and integrate charge coupled device (TDI-CCD) pitching imaging is required. More accurate real-time image motion velocity vector computational model of space camera is also necessary to make the imaging perfect. Imaging motion velocity vector computation model must be set up on image plane at pitching imaging. According to the geometric relationship between the pitching imaging space camera and the Earth's rotation motion satellite borne TDI CCD pitching imaging motion velocity vector model is derived by mapping the ground speed to the image plane and using coordinate transformation method. The numerical simulation results show that the image velocity model can reduce deviation angle error about 33' and about 30% image motion speed error compared to traditional ground velocity model. 2009 IEEE.
	Fast-forward solvers for the low-frequency detection of buried dielectric objects 期刊论文 OAI收割 Ieee Transactions on Geoscience and Remote Sensing, 2003, 卷号: 41, 期号: 9, 页码: 2026-2036 作者: Zhang YH(张云华) 收藏 \| 浏览/下载：36/0 \| 提交时间：2014/05/04 buried objects conjugate-gradient fast Fourier transform (CG-FFT) algorithm cyclic convolution cyclic correlation fast extended Born approximation half space low-frequency numerical simulation extended born approximation ground-penetrating radar electromagnetic scattering 3-dimensional bodies fft method simulation inversion transform algorithm size