Zobrazeno 1 - 10
of 465
pro vyhledávání: '"Yu Wei-dong"'
Publikováno v:
Leida xuebao, Vol 4, Iss 3, Pp 265-275 (2015)
Conventional ground moving target imaging algorithms mainly focus on the range cell migration correction and the motion parameter estimation of the moving target. However, in real Synthetic Aperture Radar (SAR) data processing, non-ideal motion error
Externí odkaz:
https://doaj.org/article/bbef2b1401ae441baa235d201d0d947e
Publikováno v:
Leida xuebao, Vol 3, Iss 3, Pp 256-265 (2014)
HJ-1-C is a Synthetic Aperture Radar (SAR) satellite in the Constellation of “2+1” for China environment and disaster monitoring. It works at S-band with a resolution of 5 m. SAR payload uses a reflector antenna and a high-power concentrated tran
Externí odkaz:
https://doaj.org/article/3e0786cf422648f5b6360f53e2757224
Publikováno v:
Leida xuebao, Vol 3, Iss 3, Pp 352-360 (2014)
Road network extraction in SAR images is one of the key tasks of military and civilian technologies. To solve the issues of road extraction of HJ-1-C SAR images, a road extraction algorithm is proposed based on the integration of ratio and directiona
Externí odkaz:
https://doaj.org/article/23d62e404cfe4a20b6b65ae0ed5a9fcb
Publikováno v:
Leida xuebao, Vol 3, Iss 2, Pp 176-182 (2014)
The Back Projection (BP) algorithm is a very important time-domain methodology for Synthetic Aperture Radar (SAR) imaging. However, conventional autofocus techniques are based on frequency-domain imaging algorithms, and can not be directly applied to
Externí odkaz:
https://doaj.org/article/96292c0d98cd4166bff2754c42ad6cd6
Publikováno v:
Leida xuebao, Vol 3, Iss 3, Pp 307-313 (2014)
In this paper, the HJ-1-C SAR full-power radiation test design is presented. For the new problems caused by SAR high-power concentrated emissions, the radar-receiving channel-leakage power test is proposed to ensure the safety of the radar-receiving
Externí odkaz:
https://doaj.org/article/9384035794734dada723f9f26ce49350
Publikováno v:
Leida xuebao, Vol 3, Iss 1, Pp 61-69 (2014)
Attitude Steering has been widely applied to the current low orbit SAR system to decrease the rang/azimuth coupling of the received data. This paper focuses on the impacts of attitude steering to the observation properties of Geo-SAR, namely, Doppler
Externí odkaz:
https://doaj.org/article/4767e8533f134018b06c2057591f40ec
Publikováno v:
Leida xuebao, Vol 1, Iss 3, Pp 301-308 (2012)
The Pixel Relativity (PR) measurement of SAR image, which is the key of the despeckling techniques based on weighted average, is researched in three aspects. Firstly, the rationality of ratio PR model is expounded, and two new ratio PR models, which
Externí odkaz:
https://doaj.org/article/493a0e1494d24891b57c89468425da36
Publikováno v:
Leida xuebao, Vol 1, Iss 2, Pp 171-181 (2012)
Based on the ratio distance pixel-relativity and thresholding pixel-similarity, a modified non-local filter is proposed for SAR image despeckling in this paper. Firstly, the ratio distance pixel-relativity is obtained by transforming the joint probab
Externí odkaz:
https://doaj.org/article/2d22a86250064281a263f6d9e3d6d1c5
Publikováno v:
Leida xuebao, Vol 1, Iss 1, Pp 96-99 (2012)
Accurate phase stability measurement of Transmitting and Receiving channels in space-borne SAR (Synthetic Aperture Radar) system is important to evaluate imaging quality. Based on fewer instruments, matched filtering and interpolation algorithm, two
Externí odkaz:
https://doaj.org/article/13ab420483f94189a185283a265ec109
Autor:
Jie-pin Li, Yuan-jie Liu, Yang Li, Yi Yin, Qian-wen Ye, Zhi-hua Lu, Yu-wei Dong, Jin-yong Zhou, Xi Zou, Yu-gen Chen
Publikováno v:
Journal of Translational Medicine, Vol 22, Iss 1, Pp 1-25 (2024)
Abstract Cellular communication (CC) influences tumor development by mediating intercellular junctions between cells. However, the role and underlying mechanisms of CC in malignant transformation remain unknown. Here, we investigated the spatiotempor
Externí odkaz:
https://doaj.org/article/43465b0c96674095b48ec4037b58372b