中国科学院机构知识库网格系统: 检索

Editorial: Advances in geophysical inverse problems 期刊论文 OAI收割
FRONTIERS IN EARTH SCIENCE, 2023, 卷号: 11, 页码: 2
作者: Wang, Yanfei; Yagola, A. G.; Gelius, L. J.

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收藏 | 浏览/下载：11/0 | 提交时间：2024/01/02

inverse problems geophysical exploration regularization method joint inversion approach nanoscale imaging

Mapping functional diversity using individual tree-based morphological and physiological traits in a subtropical forest 期刊论文 OAI收割
REMOTE SENSING OF ENVIRONMENT, 2021, 卷号: 252
作者: Zheng, Zhaoju; Zeng, Yuan; Schneider, Fabian D.; Zhao, Yujin; Zhao, Dan

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收藏 | 浏览/下载：10/0 | 提交时间：2023/02/24

LiDAR Imaging spectroscopy Forest diversity Functional traits Individual tree-based approach Scaling

Microwave SAIR Imaging Approach Based on Deep Convolutional Neural Network 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2019, 卷号: 57, 期号: 12, 页码: 10376-10389
作者: Zhang, Yilong; Ren, Yuan; Miao, Wei; Lin, Zhenhui; Gao, Hao

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收藏 | 浏览/下载：77/0 | 提交时间：2020/03/19

Convolutional neural network (CNN) deep learning (DL) imaging approach microwave synthetic aperture interferometric radiometers (SAIRs)

Design of small-scale gradient coils in magnetic resonance imaging by using the topology optimization method 期刊论文 OAI收割
Chinese Physics B, 2018, 卷号: 27, 期号: 5, 页码: 10
作者: Pan, H.; Jia, F.; Liu, Z. Y.; Zaitsev, M.; Hennig, J.

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收藏 | 浏览/下载：31/0 | 提交时间：2019/09/17

topology optimization method gradient coils solid isotropic material with penalization magnetic resonance imaging target field approach nmr microscopy element-method mri microcoils length Physics

MICROWAVE RADIATION IMAGING APPROACH BASED ON SPARSE REPRESENTATION 会议论文 OAI收割
36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Beijing, PEOPLES R CHINA, JUL 10-15, 2016
作者: Yang, Xiaocheng; Ding, Lurong; Wu, Long; Yan, Jingye; Wu, Ji

收藏 | 浏览/下载：34/0 | 提交时间：2017/04/07

microwave radiometer sparse representation compressive sensing sparse basis imaging approach

Synthetic aperture radar image despeckling via total generalised variation approach 期刊论文 OAI收割
IET IMAGE PROCESSING, 2015, 卷号: 9, 期号: 3, 页码: 236-248
作者: Feng, Wensen; Lei, Hong; Qiao, Hong

收藏 | 浏览/下载：25/0 | 提交时间：2015/09/21

synthetic aperture radar radar imaging image denoising speckle variational techniques piecewise constant techniques smoothing methods higher order statistics optimisation Monte Carlo methods synthetic aperture radar image despeckling total generalised variation approach speckle reduction total variation regularisation piecewise constant image smooth transition TGV-based model staircasing artefact reduction higher order smoothness numerical scheme Nesterov algorithm TGV-based optimisation problem Monte Carlo method

Inverse field-based approach for simultaneous B-1 mapping at high fields - A phantom based study 期刊论文 OAI收割
JOURNAL OF MAGNETIC RESONANCE, 2012, 卷号: 217, 页码: 27-35
Jin, Jin; Liu, Feng; Zuo, Zhentao; xue, rong; 薛蓉; Li, Mingyan; Li, Yu; Weber, Ewald; Crozier, Stuart

收藏 | 浏览/下载：26/0 | 提交时间：2013/12/24

Transmit sensitivity mapping Receive sensitivity (receptivity) mapping B-1 Inverse method Field-based approach Signal intensity Parallel imaging SENSE Iterative optimization Method of moments (MoM)

Gimbal displacement error analysis on an electro-optical seeker (EI CONFERENCE) 会议论文 OAI收割
Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

It is essential to analyze the gimbal displacement errors for a seeker due to the importance for cueing of targets and tracking for the final approach. Otherwise for a seeker electro-driven with a concentric glass dome the large errors will decrease the picking pointing and tracking precision rooted from the displacement errors existing between the rotation center of the optical system and the gimbal. And the gimbaled camera system displacement errors are never eliminated but reduced due to the geometric errors consists of geometric tolerances of gimbal structure manufacture installation and vibration coming from working environment. In this paper the gimbal displacement errors in an electro-optically stabilized platform resulting from geometric errors and environment errors were analyzed and shown in detail. The mathematical modal of the gimbal displacement errors created based on multi-body dynamics demonstrated the connection between the gimbal displacement errors and the stabilized platform. Taking a visible light image seeker as a case the diameter is 120mm and the geometric tolerances came from the values of primary design and the vibration data came from the environmental vibration test on the pitch-yaw seeker and at the same time the errors resulting from installation were considered too. Based on calculating the maximum gimbal displacement error will reach to 0.2mm for pitching angle smaller than 40 and yawing angle smaller than 60. However the critical parts have been found out according to the probability theory and the reliability analysis successfully used in the paper and finally the maximum gimbal displacement error reduced to 0.1mm which is acceptable corresponding to the picking pointing and tracking precision for an optical imaging seeker. 2010 Copyright SPIE - The International Society for Optical Engineering.

A method of outdoor simulation of infrared radiance of targets (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, June 17, 2009 - June 19, 2009, Beijing, China
Song J.-T.; Shen X.-H.; Zhao Y.-J.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Current research on infrared simulation often focuses mainly on infrared imaging simulation by computer and pays little attention to outdoor simulation of infrared radiation characteristics of targets. In order to simulate infrared radiance of targets outdoors in this paper we propose a new outdoor simulation method on the basis of heating the cloth by electricity. There are two major contributions in the paper. Firstly uneven distributing of temperature field of the cloth surface is considered and the long-wave thermal imager is used as a link of the temperature control system. On the basis of many experiments the expression is concluded about the relation of the temperature obtained by the lone-wave thermal imager and the temperature obtained by the temperature control system and the environmental temperature at the experimental scene. Secondly the influence of the environment at the experimental scene on the infrared radiance of the cloth surface is thought over. Thanks to two measures above simulation precision of infrared radiance is made much better. The results of many outdoor experiments demonstrate the performance of the proposed approach. 2009 SPIE.

Recent development in bioluminescence tomography 期刊论文 OAI收割
CURRENT MEDICAL IMAGING REVIEWS, 2006, 卷号: 2, 期号: 4, 页码: 453-457
作者: Wang, Ge; Qian, Xin; Cong, Wenxiang; Shen, Haiou; Li, Yi

收藏 | 浏览/下载：27/0 | 提交时间：2015/11/06

bioluminescence imaging bioluminescence tomography finite element method Monte Carlo approach molecular optical simulation environment multi-spectral signal separation