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Land Cover Classification of RADARSAT-2 SAR Data Using Convolutional Neural Network

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Wuhan University Journal of Natural Sciences 2016年第2期21卷 151-158页

作者： LIN Wei LIAO Xiangyong DENG Juan liu yao International School of Software Wuhan University

In this paper,we propose a convolutional neural network（CNN）based on deep learning method for land cover classification of synthetic aperture radar（SAR）*** proposed method consists of convolutional layers,pooling layers,a full connection layer and an output *** method acquires high-level abstractions for SAR data by using a hierarchical architecture composed of multiple non-linear transformations such as convolutions and *** feature maps produced by convolutional layers are subsampled by pooling layers and then are converted into a feature vector by the full connection *** feature vector is then used by the output layer with softmax regression to perform land cover *** multi-layer method replaces hand-engineered features with backpropagation（BP）neural network algorithm for supervised feature learning,hierarchical feature extraction and land cover classification of SAR ***-2 ultra-fine beam high resolution HH-SAR images acquired in the rural urban fringe of the Greater Toronto Area（GTA）are selected for this *** experiment results show that the accuracy of our classification method is about90%which is higher than that of nearest neighbor（NN）.

关键词： synthetic aperture radar (SAR) classification deep learning convolutional neural network (CNN) softmax regression

Near infrared molybdenum oxide quantum dots with high photoluminescence and photothermal performance

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Chinese Chemical Letters 2020年第6期31卷 1616-1619页

作者： Xiaoxiao Dong Hong Zhao Yuanyuan Mi yao liu Yida Zhang Ya liu Yusheng Chen Quan Xu State Key Laboratory of Heavy Oil Processing College of Mechanical and Transportation EngineeringChina University of Petroleum-BeijingBeijing 102249China Research Institute for New Materials Technology Chongqing University of Arts and ScienceChongqing 402160China Department of Chemical Science University of AkronAkronOH 44325United States

The synthesized near infrared molybdenum oxide quantum dots perform excellent red fluorescence imaging performance and photothermal performance,which have 600,650 and 700 nm three unique peaks excited at 540 nm,with a high quantum yield around 20%.Meanwhile,with 808 nm NIR laser excitation,10 mg/mL modified Molybdenum oxide quantum dots can increase temperature up to 72.2℃within 150 s and 77.7℃within 270 s,respectively.

关键词： Molybdenum oxide quantum dots Fluorescence imaging performance Photothermal performance Carbon dots Near infrared

Identification of eight Berberis species from the Yunnan-Guizhou plateau as aecial hosts for Puccinia striiformis ***,the wheat stripe rust pathogen

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Journal of Integrative Agriculture 2021年第6期20卷 1563-1569页

作者： LI Si-nan CHEN Wen MA Xin-yao TIAN Xia-xia liu yao HUANG Li-li KANG Zhen-sheng ZHAO Jie State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection Northwest A&F UniversityYangling 712100P.R.China Guizhou Institute of Plant Protection Guizhou Academy of Agricultural SciencesGuiyang 550006P.R.China

Puccinia striiformis *** Erikss.(Pst)infects wheat and causes stripe *** rust is heteroecious with wheat as the primary uredinial and telial host and barberry(Berberis spp.)as the alternate pycnial and aecial *** than 40 Berberis species have been identified as alternate hosts for Pst,and most of these are Chinese Berberis ***,little is known about Berberis species or their geographic distributions in the Yunnan-Guizhou plateau in southwestern *** Yunnan-Guizhou plateau is considered to be an important and relatively independent region for the evolution of the wheat stripe rust pathogen in China because the entire disease cycle can be completed within the *** this study,we conducted a survey of barberry plants in the Yunnan-Guizhou plateau and identified the eight Pst-susceptible Berberis species under controlled conditions,including ***,***,***,***,*** ***,***,*** and *** species are reported here for the first time to serve as alternate hosts for the wheat stripe rust pathogen under controlled conditions.

关键词： Berberis spp. alternate host Puccinia striiformis f.sp.tritici sexual reproduction stripe rust wheat yellow rust

Evaluation of Land-Use Efficiency Based on Regional Scale——A Case Study in Zhanjiang,Guangdong Province

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Journal of China University of Mining and Technology 2007年第2期17卷 215-219页

作者： CHEN Shi-yin liu yao-lin CHEN Cui-fang College of Resources and Environmental Science Wuhan University Wuhan Hubei 430079 China College of Agriculture Guangdong Ocean University Zhanjiang Guangdong 524088 China

Evaluating land use efficiency is critical to the revision of general land use planning. An assessment indicator system for regional land use efficiency was established in this paper from the aspects of society,economy,ecology and environment. The weight of each indicator was defined by an analytical hierarchy process (AHP) and the entropy method (EM). Then,a case study in Zhanjiang was carried out to analyze the regional land use efficiency from 1996 to 2004 and its development by using the method of multifactor composite evaluation and an analytical model of the de-gree of coordination. The results indicate that land use efficiency with respect to society and the economy improved,whereas the ecological and environmental efficiencies were found to decrease. The degree of coordination in Zhanjiang is still at the status of basic coordination. Finally,measures for enhancing the ecological and environmental establish-ment are suggested in order to improve the regulations of land use structure and patterns,establish ecological forests for the public good and green corridors and prevent the soil erosion.

关键词： regional scale land-use efficiency degree of coordination evaluation

Barium charge transferred doped carbon dots with ultra-high quantum yield photoluminescence of 99.6% and applications

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Chinese Chemical Letters 2021年第2期32卷 861-865页

作者： yao liu Jianfei Wei Xiang Yan Ming Zhao Chaozhong Guo Quan Xu Chongqing Key Laboratory of Materials Surface&Interface Science College of Materials Science and EngineeringChongqing University of Arts and SciencesChongqing 402160China School of Materials Designing and Engineering Beijing Institute of Fashion TechnologyBeijing 100029China School of Materials Science and Engineering Boise UniversityBaise 533000China State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Biogas Upgrading UtilizationChina University of Petroleum-BeijingBeijing 102249China

Long-emission carbon dots(CDs) is triggering immense enthusiasm on account of their intrinsic merits of high chemical stability and excellent optical *** this study,a facile and rapid approach was developed for the preparation of barium-doped carbon dots(Ba-CDs) with yellow fluo rescence emission and high quantum *** chemistry and the chemical architecture of the Ba-CDs was revealed under various spectroscopic *** work provides more insights into the effects of charge transfer caused by Ba heteroatoms,which is considered as the most challenging step in the investigation on luminescence ***,the prepared Ba-CDs were successfully applied as fluorescent probes in the detection of trace water in organic solvents(ethanol,isopropanol,acetone,tetrahydrofuran).Comparing with traditional fluorescent probes for water detection in organic solvents,Ba-CDs detection provides a more sensitive,much faster and more economical approach.

关键词： Ba-doped Carbon dots Quantum yield Charge transfer Fluorescent sensors

SAR Image Coregistration Using Fringe Definition Detection

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Journal of Mountain Science 2013年第5期10卷 790-800页

作者： YANG Ying-hui CHEN Qiang liu Guo-xiang Li Zhi-lin CHENG Hai-qin liu Li-yao Department of Remote Sensing and Geoinformation Engineering Southwest Jiaotong University School of Civil Engineering and Architecture East China Jiaotong University

In order to overcome the limitation of cross correlation coregistration method for Synthetic Aperture Radar （SAR） interferometric pairs with low coherence, a new image coregistration algorithm based on Fringe Definition Detection （FDD） is presented in this paper. The Fourier transformation was utilized to obtain spectrum characteristics of interferometric fringes. The ratio between spectrum mean and peak was proposed as the evaluation index for identifying homologous pixels from interferometric images. The satellites ERS-1/2 C-band SAR acquisitions covering the Yangtze River plain delta, eastern China and ALOS/PALSAR L-band images over the Longmen Shan mountainous area, southwestern China were respectively employed in the experiment to validate the proposed coregistration method. The testing results suggested that the derived Digital Elevation Model （DEM） from FDD method had good agreement with that from the cross correlation method as well as the reference DEM at high coherence area. However, The FDD method achieved a totally improved topographic mapping accuracy by 24 percent in comparison to the cross correlation method. The FDD method also showed better robustness and achieved relatively higher performance for SAR image eoregistration in mountainous areas with low coherence.

关键词： SAR image coregistration Spectrumcharacteristics Fringe definition detection Interferometric Synthetic Aperture Radar (InSAR) Accuracy assessment

Successful treatment of a patient with diffuse alveolar hemorrhage and anti-neutrophil cytoplasmic antibody-associated vasculitis

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World Journal of Emergency Medicine 2022年第3期13卷 245-247页

作者： yao liu Qiu-ling Zhang Heng-jun liu Wei Wang Yi Zhou Peng Xu Emergency Department of Drum Tower Hospital the Affiliated Hospital of Nanjing University Medical SchoolNanjing 210008China

Dear editor,Anti-neutrophil cytoplasmic antibody(ANCA)-associated vasculitis(AAV)is a cluster of disorders characterized by inflammation and destruction of smalland medium-size blood vessels as well as the presence of... 详细信息

关键词： neutrophil inflammation ANCA

An adaptive joint source and channel coding scheme for H.264 video multicasting over wireless LAN

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第5期7卷 837-846页

作者： liu Zheng-ye liu Hang WANG yao Six MetroTech Center Polytechnic University Brooklyn NY ll201 USA Corporate Research Lab Thomson Inc Princeton NJ 08540 USA Six MetroTech Center Polytechnic University Brooklyn NY ll201 USA

This paper proposes an adaptive joint source and channel coding scheme for H.264 video multicast over wireless LAN which takes into account the user topology changes and varying channel conditions of multiple users, and dynamically allocates available bandwidth between source coding and channel coding, with the goal to optimize the overall system performance. In particular, source resilience and error correction are considered jointly in the scheme to achieve the optimal performance. And a channel estimation algorithm based on the average packet loss rate and the variance of packet loss rate is proposed also. Two overall performance criteria for video multicast are investigated and experimental results are presented to show the improvement obtained by the scheme.

关键词： Multicast over 802.11 wireless local area networks (WLAN), Adaptive joint source and channel coding, H.264

The prevalence of azoospermia factor microdeletion on the Y chromosome of Chinese infertile men detected by multi-analyte suspension array technology

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Asian Journal of Andrology 2008年第6期10卷 873-881页

作者： Yi-Jian Zhu Si-yao liu Huan Wang Ping Wei Xian-Ping Ding Institute of Medical Genetics Key Laboratory of Bio-resources and Eco-environment Ministry of Education College of Life Science Sichuan University Chengdu 610064 China

Aim： To develop a high-throughput multiplex, fast and simple assay to scan azoospermia factor （AZF） region microdeletions on the Y chromosome and establish the prevalence of Y chromosomal microdeletions in Chinese infertile males with azoospermia or oligozoospermia. Methods： In total, 178 infertile patients with azoospermia （nonobstructed）, 134 infertile patients with oligozoospermia as well as 40 fertile man controls were included in the present study. The samples were screened for AZF microdeletion using optimized multi-analyte suspension array （MASA） technology. Results： Of the 312 patients, 36 （11.5%） were found to have deletions in the AZF region. The rnicrodeletion frequency was 14% （25/178） in the azoospermia group and 8.2% （11/134） in the oligospermia group. Among 36 patients with microdeletions, 19 had deletions in the AZFc region, seven had deletions in AZFa and six had deletions in AZFb. In addition, four patients had both AZFb and AZFc deletions. No deletion in the AZF region was found in the 40 fertile controls. Conclusion： There is a high prevalence of Y chromosomal microdeletions in Chinese infertile males with azoospermia or oligozoospermia. The MASA technology, which has been established in the present study, provides a sensitive and high-throughput method for detecting the deletion of the Y chromosome. And the results suggest that genetic screening should be advised to infertile men before starting assisted reproductive treatments.

关键词： Y chromosome microdeletion azoospermia factor male infertility multi-analyte suspension array (MASA)