Search results for: Wentao An

Items from 1 to 18 out of 18 results

article

Glucocorticoid modulatory element-binding protein 1 (GMEB1) interacts with the de-ubiquitinase USP40 to stabilize CFLAR_L and inhibit apoptosis in human non-small cell lung cancer cells

Wentao An, Shun Yao, Xiaoyang Sun, Zhaoyuan Hou, more

Journal of Experimental & Clinical Cancer Research > 2019 > 38 > 1 > 1-13

Background GMEB1 was originally identified via its interaction with GMEB2, which binds to the promoter region of the tyrosine aminotransferase (TAT) gene and modulates transactivation of the glucocorticoid receptor gene. In the cytosol, GMEB1 interacts with and inhibits CASP8, but the molecular mechanism is currently unknown. Methods Human non-small cell lung cancer cells and 293FT cells were used...

article

The arginine methyltransferase PRMT5 and PRMT1 distinctly regulate the degradation of anti-apoptotic protein CFLAR_L in human lung cancer cells

Mingyue Li, Wentao An, Linyan Xu, Yidan Lin, more

Journal of Experimental & Clinical Cancer Research > 2019 > 38 > 1 > 1-13

Background CFLAR_L, also known as c-FLIP_L, is a critical anti-apoptotic protein that inhibits activation of caspase 8 in mammalian cells. Previous studies have shown that arginine 122 of CFLAR_L can be mono-methylated. However, the precise role of arginine methyltransferase of CFLAR_L remains unknown. PRMT5 and PRMT1, which are important members of the PRMT family, catalyze the transfer of methyl groups...

chapter

Compensation of the positioning shift cauesd by inaccurate geodetic terrain heights for radarsat-2 data

Wentao An, Mingsen Lin, Chunhua Xie

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 3282 - 3285

IGARSS 2017 - 2017 IEEE International Geoscience and Remote Sensing Symposium

Based on multi-temporal observations of static targets on sea surface, a positioning shift that relates to geodetic terrain heights (GTH) is found. The positioning shift mainly exists in the range direction of a SAR image and has an almost linear relationship with the difference between the real GTH of a target and the GTH of a SAR product. An approach of compensating the positioning shift is proposed...

article

Coastline Detection in SAR Images Using a Hierarchical Level Set Segmentation

Chun Liu, Jian Yang, Junjun Yin, Wentao An

IEEE Journal of Selected Topics in Applied Earth Observations and Remote... > 2016 > 9 > 11 > 4908 - 4920

This paper proposes a new coastline detection method for both single-polarization and quad-polarization synthetic aperture radar (SAR) images. Unlike other coarse-to-fine methods using a combination of two boundary extraction techniques in two layers, the proposed method extracts coastlines by a hierarchical structure from coarse one to fine one using level set and narrow-band level set techniques...

chapter

A three-component decomposition algorithm for polarimetric SAR with the helix angle compensation

Wentao An, Chunhua Xie, Mingsen Lin

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 7501 - 7504

IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium

A three-component decomposition algorithm is proposed for polarimetric SAR data. After extracting the volume scattering component, both the orientation angle compensation and a unitary transformation are applied to the remaining matrix to derive the second and third components which are exactly consistent with either the surface scattering model or the double-bounce scattering model, respectively...

chapter

Sea surface wind speed inversion using low incident NRCS

Qingliu Bao, Youguang Zhang, Wentao An, Limin Cui, more

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 4619 - 4622

IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium

As the launch of radars, such as the Precipitation Radar (PR) on Tropical Rainfall Measuring Mission (TRMM)[1] satellite and the Surface Wave Investigation and Monitoring (SWIM) on China France Oceanography SATellite (CFOSAT)[2], that operate in low incident angles, more and more NRCS data at low incident angle will be obtained. In order to retrieve the sea surface wind speed using low incident angle...

article

An Improved Iterative Censoring Scheme for CFAR Ship Detection With SAR Imagery

Wentao An, Chunhua Xie, Xinzhe Yuan

IEEE Transactions on Geoscience and Remote Sensing > 2014 > 52 > 8 > 4585 - 4595

To eliminate the influence of target returns on the estimation of local sea clutter distributions, an improved iterative censoring scheme (ICS) for constant false-alarm rate detectors is proposed with two modifications. First, the proposed ICS censors out both target pixels and their four-connected neighborhood pixels from the estimation of local sea clutter distributions. Second, a novel initial...

article

An Improvement on the Complete Model-Based Decomposition of Polarimetric SAR Data

Wentao An, Chunhua Xie

IEEE Geoscience and Remote Sensing Letters > 2014 > 11 > 11 > 1926 - 1930

An improvement on the complete three-component model-based decomposition (C3MD) of polarimetric synthetic aperture radar (SAR) data is proposed in this letter. When analyzing the scattering mechanism of the third component in the original C3MD, an orientation angle rotation (OAR) is used. However, the deorientation is found more suitable to be applied to analyze the scattering mechanism of the third...

chapter

Modified polarimetric whitening filter for polarimetric SAR data

Wentao An, Mingsen Lin, Chunhua Xie, Guangyi Zhou, more

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS > 2481 - 2484

IGARSS 2013 - 2013 IEEE International Geoscience and Remote Sensing Symposium

To preserve the power information in the output of polarimetric whitening filter (PWF), a modified PWF is proposed for polarimetric synthetic aperture radar (PolSAR) imagery. Besides minimizing the standard deviation to mean ratio, the modified PWF also requires its output closest to the original polarimetric vector in a minimum mean-square error sense. This principle is consistent with that of the...

article

Improved Four-Component Model-Based Target Decomposition for Polarimetric SAR Data

Zili Shan, Chao Wang, Hong Zhang, Wentao An

IEEE Geoscience and Remote Sensing Letters > 2012 > 9 > 1 > 75 - 79

An improved four-component model-based target decomposition scheme for polarimetric synthetic aperture radar data is proposed in this letter. The reason for the emergence of the negative powers in the Yamaguchi decomposition has been analyzed, and three corresponding additional steps are added in the proposed scheme. First, the orientation angle compensation is applied to the coherency matrix. Second,...

article

Four-Component Model-Based Decomposition of Polarimetric SAR Data for Special Ground Objects

Zili Shan, Hong Zhang, Chao Wang, Wentao An, more

IEEE Geoscience and Remote Sensing Letters > 2012 > 9 > 5 > 989 - 993

A four-component model-based decomposition for polarimetric synthetic aperture radar (SAR) images is proposed to deal with the ground objects with orientation angles around 45 $^{\circ}$ . In the previous decompositions, these special targets are mixed with the vegetated areas. With the deficiency of the previous decompositions analyzed, the ambiguity between two scattering mechanisms is clarified. A...

chapter

A visualization method for SAR images

Guangyi Zhou, Wentao An, Jian Yang, Hua Zhong

2011 IEEE International Geoscience and Remote Sensing Symposium > 374 - 377

IGARSS 2011 - 2011 IEEE International Geoscience and Remote Sensing Symposium

Visual interpretation of SAR images plays a critical role in remote sensing applications. For rapidly obtaining the image suitable for human observation, a new method of visualization for SAR images is proposed in this paper. The statistics of the SAR data, including the single channel data intensity and the span of the Pol-SAR data, are derived. The proposed method is a parameterized method based...

article

Nonlocal Filtering for Polarimetric SAR Data: A Pretest Approach

Jiong Chen, Yilun Chen, Wentao An, Yi Cui, more

IEEE Transactions on Geoscience and Remote Sensing > 2011 > 49 > 5 > 1744 - 1754

A pretest approach based on the complex Wishart distribution in polarimetric synthetic aperture radar (POLSAR) speckle filtering is proposed in this paper. The main principle is to select homogeneous pixels in a large-scale area in the filtering process, which is called pretesting. To preserve details and fine structures while despeckling, the homogeneous pixels are selected by comparing their 3 ×...

article

Four-Component Decomposition of Polarimetric SAR Images With Deorientation

Wentao An, Chunhua Xie, Xinzhe Yuan, Yi Cui, more

IEEE Geoscience and Remote Sensing Letters > 2011 > 8 > 6 > 1090 - 1094

A modified Yamaguchi decomposition with deorientation is proposed for analyzing multilook polarimetric synthetic aperture radar (PolSAR) data. Deorientation is first applied to a coherence matrix; then, the coherence matrix is decomposed into four components by the Yamaguchi decomposition. A special kind of target is found for which the original Yamaguchi decomposition output is not appropriate. This...

article

Fast Alternatives to $H/\alpha$ for Polarimetric SAR

Wentao An, Yi Cui, Jiang Yang, Hongji Zhang

IEEE Geoscience and Remote Sensing Letters > 2010 > 7 > 2 > 343 - 347

The polarimetric entropy (H) and the alpha angle (α) are two important parameters for analyzing polarimetric synthetic aperture radar data. However, for some special cases, the unstableness of the alpha angle is found; in addition, time consumption for extracting both the parameters will become quite tedious for very large images by pixelwise eigendecomposition. To overcome these shortcomings, a fast...

article

Three-Component Model-Based Decomposition for Polarimetric SAR Data

Wentao An, Yi Cui, Jian Yang

IEEE Transactions on Geoscience and Remote Sensing > 2010 > 48 > 6 > 2732 - 2739

An improved three-component decomposition for polarimetric synthetic aperture radar (SAR) data is proposed in this paper. The reasons for the emergence of negative powers in the Freeman decomposition have been analyzed, and three corresponding improvements are included in the proposed method. First, the deorientation process is applied to the coherency matrix before it is decomposed into three scattering...

chapter

Three-component decomposition for polarimetric SAR

Wentao An, Yi Cui, Jiang Yang

2009 IEEE International Geoscience and Remote Sensing Symposium > 3 > III-713 - III-716

2009 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2009)

An improved three-component decomposition for polarimetric SAR data is proposed in this paper. The reasons of the emergence of negative powers in the Freeman decomposition have been analyzed, and two improvements are included. Firstly, the deorientation process is applied to the coherency matrix before it is decomposed into three scattering components. Then, the coherency matrix with the maximal polarimetric...

article

Data Compression for Multilook Polarimetric SAR Data

Wentao An, Yi Cui, Weijie Zhang, Jian Yang

IEEE Geoscience and Remote Sensing Letters > 2009 > 6 > 3 > 476 - 480

This letter attempts to address the problem on the emergence of negative eigenvalues in the coherency matrix after the compressing of multilook polarimetric synthetic aperture radar (SAR) data. A new nine-parameter expression for the eigenvalue decomposition of the coherency matrix is introduced, and a new compression algorithm is proposed for multilook polarimetric data with this expression. By comparing...

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