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2 results on '"YIN Jian-feng"'

1. Three-Dimensional Imaging Technique of Space Moving Target Based on Spaceborne Along-Cross Track Millimeter-Wave In-ISAR.

Author

YIN Jian-feng, LI Dao-jing, WANG Ai-ming, and LI Zhi

Subjects
*MILLIMETER waves, *SYNTHETIC aperture radar, *ALGORITHMS, *INTERFEROMETRY, *MICROWAVES, *ELECTROMAGNETIC waves
Abstract

The three-dimensional (3-D) images of space targets with spaceborne along/cross track millimeter-wave (MMW) interferometric inverse synthetic aperture radar (In-ISAR) is studied under the condition of low SNR input in this paper. Because the traditional Range-Doppler (RD) algorithm can't get good performance when the target size is large and required high resolution. The wave number domain imaging algorithm is introduced to obtain two-dimensional (2-D) high resolution images of space moving targets. Then along/cross track interferometric processing is implemented for the three 2-D images obtained from three antennas to determine 3-D positions of the target scattering points. As the foundation of 2-D imaging and image registration, target detection and 3-D velocity estimation at low SNR input are studied here. The requirement for velocity estimation accuracy is analyzed. Finally, numerical experimental results are given to demonstrate the effectiveness of the along/cross track In-SAR system. [ABSTRACT FROM AUTHOR]

Published
2013
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2. Qualitative and quantitative analysis of chemical components in Eupatorium lindleyanum DC. by ultra‐performance liquid chromatography‐mass spectrometry integrated with anti‐inflammatory activity research.

Author

Huang, Lu, Xu, Ding‐Qiao, Chen, Yan‐Yan, Fu, Rui‐Jia, Yue, Shi‐Jun, Yin, Jian‐Feng, and Tang, Yu‐Ping

Subjects
*LIQUID chromatography-mass spectrometry, *QUADRUPOLE ion trap mass spectrometry, *QUANTITATIVE chemical analysis, *QUALITATIVE chemical analysis, *TIME-of-flight mass spectrometry, *HIGH performance liquid chromatography
Abstract

As a traditional Chinese medicine, Eupatorium lindleyanum DC. has an effect on resolving phlegm, relieving cough, and relieving asthma. In this study, an ultra high performance liquid chromatography with quadrupole time‐of‐flight mass spectrometry method was established for qualitative analysis of Eupatorium lindleyanum. Besides, we developed an ultra high performance liquid chromatography with triple quadrupole tandem mass spectrometry method in positive and negative multiple reaction monitor modes for the quantitative analysis of 27 chemical constituents from 19 different batches of Eupatorium lindleyanum. The methodology validated linearity, intraday and interday precision, stability, repeatability, and recovery. The results showed that there were some differences in different batches of Eupatorium lindleyanum, which might be attributed to the influence of different growth environments and climatic conditions on the accumulation of compounds. The variable importance of projection value of orthogonal partial least square discriminant analysis and anti‐inflammatory activity test showed that eupalinolide A, B, C, and K have high content and strong activity, which could provide a reference for the follow‐up study of the quality markers of Eupatorium lindleyanum. Collectively, we developed a rapid and efficient method for the qualitative analysis and simultaneous quantification of Eupatorium lindleyanum, which was beneficial for the comprehensive utilization and development of resources. [ABSTRACT FROM AUTHOR]

Published
2021
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