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| 1 | Analysis of forest backscattering characteristics based on polarization coherence tomography显示文摘It is difficult to make an inventory of vertical profiles of forest structure parameters in field measurements.However,analysis and understanding of forest backscattering characteristics contribute to estimation and detection of forest vertical structure because of the close relationships between backscattering characteristics and structure parameters.The vertical structure function in the complex interferometric coherence definition,which represents the vertical variation of microwave scattering with the penetration depth at a point in the 2-D radar image and can be used to analyze the forest backscattering characteristics,can be reconstructed from polarization coherence tomography(PCT).Based on PCT,the paper analyzes the forest backscattering characteristics and explores the inherent relationship between the result of PCT and the forest structure parameters from numerical simulation of Random Volume over Ground model(RVoG),Polarimetric SAR interferometry(PolInSAR)simulation of forest scene and PolInSAR data at L-band of the test site Traunstein.Firstly,the effects of the extinction coefficient and surface-to-volume scattering ratio in RVoG model on vertical backscattering characteristics are analyzed by means of numerical simulation.Secondly,by applying PCT to L-band POLInSAR simulations of forest scene,different variations of vertical backscattering due to different extinction coefficients and the ratios of surface-to-volume scattering resulting from different polarizations,forest types and densities are displayed and analyzed.Then a concept of relative average backscattering intensity is presented,and the factors which affect its vertical distribution are also discussed.Preliminary results show that there is high sensitivity of the vertical distribution of forest relative average backscattering intensity to the polarization,forest type and density.Finally,based on repeat pass DLR E-SAR L-band airborne POLInSAR data,the capability of PCT technology for detection of forest layer,type and density is discussed. | LUO HuanMin 1,LI XiaoWen 1,2,CHEN ErXue 3,CHENG Jian 4 & CAO ChunXiang 21 Institute of Geo-Spatial Information Science and Technology,University of Electronic Science and Technology of China,Chengdu 610054,China 2 State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,China 3Institute of Forest Resources Information Technique of Chinese Academy of Forestry,Beijing 100091,China 4 School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China | 2010 | Science China(Technological Sciences)2010，53，S1： | 2 |
| 2 | Paeoniflorin, a potent natural compound, protects PC12 cells from MPP+ and acidic damage via autophagic pathway显示文摘 | Cao BY Yang YP Luo WF | 2010 | J Ethnopharmacol2010，131，1： | 1 |
| 3 | Hepatitis B e-antigen persistency is associated with the properties of HBV-specific CD8 T Cells in CHB patients显示文摘 | Peng GP Luo BY Li J | 2011 | J Clin Immunol2011，31，2： | 1 |
| 4 | Repetitive transcranial magnetic stimulation in combination with citalopram in young patients with first-episode major depressive disor- der:a double-blind,randomized,sham-controlled trial 显示文摘 | Huang ML Luo BY Hu JB | 2012 | Aust N Z J Psychiatry2012，46，3： | 1 |
| 5 | Repetitive transcranial magnetic stimulation in combination with citalopram in young patients with first-episode major depressive disorder: a double- blind, randomized, sham-controlled trial 显示文摘 | Huang ML Luo BY Hu JB | 2012 | Aust N Z J Psychiatry2012，46，3： | 1 |
| 6 | Performance analysis of a biomass circulating fluidized bed gasifier显示文摘 | Wu CZ Xu BY Luo ZF | 1992 | Biomass and Bioenergy1992，3，2： | 1 |
| 7 | The molecular cisplatin-induced acute in rats 显示文摘 | Luo J Tsuji T Yasuda H mechanisms of the attenuation of renal failure by N-acetylcysteine Dial Transplant 2008 23 (7) : | 2008 | Nephrol2008，2198，： | 1 |
| 8 | Watermarking on Colored Images显示文摘The great success of internet and the ease of copying and distributing the electronic data has presented a new challenge of how to protect the digital data. Digital watermarks have been proposed as a means for copyright protection of multimedia. Unlike the traditional visible watermark, the challenge here is to introduce a digital watermark that does not alter the quality of electronic content, while being extremely robust to attack. From the angle of signal processing, the two basic requirements for an effective watermarking scheme, robustness and transparency conflict with each other. So the digital watermark is information that is imperceptibly and robustly embedded in the host data such that it can not be removed without important degradation of images quality.\; This paper consists of two parts. In the first part, an authentication technique by embedding digital “watermarks” into colored images is proposed. In our approach, we embed the “watermarks” with visually recognizable patterns into the images by selectively modifying the middle frequency coefficients of the image. In the second part, the technique of hiding a colored image into another colored one is proposed. The experimental results show that the proposed techniques successfully survive image processing operations, image cropping and the JPEG lossy compression. | MUSSA Bshara, NIU Xin xin, LUO Shou shan,\ YANG Yi xian Foundation item: Project Supported by National Foundation of Natural Sciences (No.60073049), National “973” Project (No.G1999035805) and Foundation for University Key Teacher by the Ministry | 2001 | The Journal of China Universities of Posts and Telecommunications2001，8，1： | 1 |
| 9 | Arterial stntctural changes in capsaicin and sail loading 显示文摘 | Zeng ZH Luo BH Gao Y J hypertensive rals induced by | 2004 | ClinExp Pharmaeol Physiol2004，31，： | 1 |
| 10 | An Analysis and Simulation of Failure in Dower Connectors显示文摘 | LUO Guo ping directed by ZHANG Ji gao | 2002 | The Journal of China Universities of Posts and Telecommunications2002，9，3： | 1 |
| 11 | Paeoniflorin, a potent natural compound, protects PC12 cells from MPP+ and acidic damage via autophagic pathway显示文摘 | Cao BY Yang YP Luo WF | 2010 | J Ethnopharmacol2010，131，1： | 1 |
| 12 | Gene expression profiling of rat testis development during the early post-natal stages显示文摘 | Liu TD Yu BY Luo FH | 2012 | Reprod Domest Anim2012，47，5： | 1 |
| 13 | Evaluation methods on the nutritional status of stroke patients 显示文摘 | Wang J Luo BY Xie HY | 2014 | Eur Rev Med Pharrnaeol Sei2014，18，24： | 1 |
| 14 | Paeoniflorin, a potent natural compound, protects PC12 cells from MPP+ and acidic damage via autophagie pathway显示文摘 | Cao BY Yang YP Luo WF | 2010 | J Ethnopharmacol2010，131，1： | 1 |
| 15 | Novel Bi2S3-sensitized Bi OCl with highly visible light photocatalytic activity for theremoval of rhodamine B显示文摘 | Cao J Xu BY Lin HL Luo BD Chen SF | 2012 | Cata Comm2012，，26： | 1 |
| 16 | Plasma gelsolin levels and1-year mortality after first-ever ischemic stroke显示文摘 | Guo XC Luo BY Li XF | 2011 | J CritCare2011，26，6： | 1 |
| 17 | Intestinal mucosal barrier is in- jured by BMP2/4 via activation of NF-KB signals after ischemic reper- fusion显示文摘 | Chen K Xie W Luo BY | 2014 | Mediators of Inflammation2014，，90： | 1 |
| 18 | Nitric oxide inhibitory effect on proliferation of cultured pulmonary artery endothelial cells under normoxia and anoxia显示文摘 | Wang PY Liu J Chen ZZ Luo DC Wang JY Sun BY | 1998 | Chin J Pharmol Toxicol(中国药理学与毒理学杂志)1998，12，4： | 1 |
| 19 | Target height as population-based study 显示文摘 | Luo ZC Albertsson-Wikland K predicted by parental heights in a Karlberg J | 1998 | Pediatr Res1998，44，4： | 1 |
| 20 | Paconiflorin,apotent natural compound,protects PC12 ceils from MPP+and acidic damage via autophagic pathway显示文摘 | Cao BY Yang YP Luo WF | 2010 | J Ethnopharmacol2010，131，： | 1 |
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