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Two-sided Long Baseline Radargrammetry from Ascending Descending Orbits with Application to Mapping Post-seismic Topography in the West Sichuan Foreland Basin

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Journal of Mountain Science 2014年第5期11卷 1298-1307页

作者： CHENG Hai-qin CHEN Qiang LIU Guo-xiang yang ying-hui LIU Li-yao Department of Remote Sensing and Geoinformation Engineering Southwest Jiaotong University School of Civil Engineering and Architecture East China Jiaotong University

One-sided ascending or descending Synthetic Aperture Radar（SAR） stereoradargrammetry has limited accuracy of topographic mapping due to the short spatial baseline（-100 km） and small intersection angle. In order to improve the performance and reliability of generating digital elevation model（DEM） from spaceborne SAR radargrammetry, an exploration of two-sided stereoradargrammetry from the combination of ascending and descending orbits with geometric configuration of long spatial baseline（-1000 km） was conducted in this study. The slant-range geometry between SAR sensors to the earth surface and the Doppler positioning equations were employed to establish the stereoscopic intersection model. The measurement uncertainty of two-sided radargrammetric elevation was estimated on the basis of radar parallax of homogeneous points between input SAR images. Two stereo-pairs of ALOS/PALSAR（Advanced Land Observing Satellite/Phased Array type L-band Synthetic Aperture Radar） acquisitions with the orbital separation almost 1080 km over the west Sichuan foreland basin with rolling topography in southwestern China were employed in the study to obtain the up-to-date terrain data after the 2008 Wenchuan earthquake that hit this area. Thequantitative accuracy assessment of two-sided radargrammetric DEM was performed with reference to field GPS observations. The experimental results show that the elevation accuracy reaches 5.5 m without ground control points（GCPs） used, and the accuracy is further improved to 1.5 m with only one GPS GCP used as the least constraint. The theoretical analysis and testing results demonstrate that the twosided long baseline SAR radargrammetry from the ascending and descending orbits can be a very promising technical alternative for large-area and high accuracy topographic mapping.

关键词： Ascending and descending orbits Twosided SAR radargrammetry Long baseline Image parallax Accuracy assessment

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

Cellular Fatty Acids as Chemical Markers for Differentiation of Acinetobacter baumannii and Acinetobacter calcoaceticus

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Biomedical and Environmental Sciences 2012年第6期25卷 711-717页

作者： yang Chao GUO Zhao Biao DU Zong Min yang hui ying BI Yu Jing WANG Gui Qin TAN Ya Fang Department of Clinical Medicine Shanxi Medical University Taiyuan 030001 Shanxi Province China Beijing University of Chinese Medicine Beijing 100029 China State Key Laboratory of Pathogen and B iosecurity Institute of Microbiology and Epidemio logy Beijing 100071 China

Objective Gas chromatography （GC） was used to investigate the cellular fatty acid （CFA） composition of 141 Acinetobacter boumannii and 32 A. calcoaceticus isolates from different locations in China and to find chemical markers to differentiate these two closely related bacteria. Methods Whole cell fatty acid methyl esters （FAMEs） were obtained by saponification, methylation, and extraction for GC analysis, followed by a standardized Microbial Identification System （MIS） analysis. Results All A. baumannii and A. calcoaceticus strains contained some major fatty acids, namely, 18：1 co9c, 16：0, Sum In Feature 3, 12：0, 17：1co8c, 3-OH-12：0, 17：0, Sum In Feature 2, 2-OH-12：0, and 18：0 compounds. Although most of the total CFAs are similar between A. baumannii and A. calcoaceticus strains, the ratios of two pairs of CFAs, i.e., Sum In Feature 3/18：1 co9c versus 16：0/18：1 co9c and Sum In Feature 3/18：1 co9c versus unknown 12.484/18：1 co9c fatty acids, could differentiate these two closely related bacteria. A. baumannii could be easily classified into two subgroups by plotting some ratios such as Sum In Feature 3/16：0 versus 17：0 and Sum In Feature 3/2-OH-12：0 versus17：0 fatty acids. Conclusion The ratios of some CFAs could be used as chemical markers to distinguish A. baumannii from A. colcoaceticus.

关键词： Acinetobacter baumannii Acinetobacter calcoaceticus Differentiation Fatty acids Gaschromatography.

Mechanism investigation of High-Performance Li-Polysulfide Batteries Enabled by Tungsten Disulfide Nanopetals

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Mechanism investigation of High-Performance Li-Polysulfide B...

中国化学会第三届中国能源材料化学研讨会

作者： Huang Shaozhuan yang hui ying Pillar of Engineering Product Development Singapore University of Technology and Design

Understanding the reaction kinetics and mechanism of Li-polysulfide batteries is critical in designing advanced host materials for improved performance. However,up to now,the reaction mechanism within the Li-polysulfide batteries is still ***,we study the reaction mechanism of a high-performance Li-polysulfide battery by in situ X-ray diffraction(XRD) and density functional theory(DFT)

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环境因素对支气管哮喘控制的影响

中华结核和呼吸杂志 2010年第8期33卷 566-567页

作者：陈萍杨慧瑛沈阳军区总医院全军呼吸内科与变态反应疾病诊治中心 110016

支气管哮喘（简称哮喘）的治疗目标是达到并维持哮喘控制[1].环境因素是诱发哮喘和哮喘急性发作的重要危险因素,环境致喘因素持续存在,哮喘则可能持续存在.因此,要达到并维持哮喘控制目标,必须了解诱发哮喘的环境因素有哪些？如何诱发... 详细信息

支气管哮喘（简称哮喘）的治疗目标是达到并维持哮喘控制[1].环境因素是诱发哮喘和哮喘急性发作的重要危险因素,环境致喘因素持续存在,哮喘则可能持续存在.因此,要达到并维持哮喘控制目标,必须了解诱发哮喘的环境因素有哪些？如何诱发哮喘？采取哪些措施可以避免.

关键词：哮喘控制支气管哮喘环境因素哮喘急性发作危险因素控制目标诱发

A nationwide survey of diabetes education, self-management and glycemic control in patients with type 2 diabetes in China

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Chinese Medical Journal 2012年第23期125卷 4175-4180页

作者： GUO Xiao-hui YUAN Li LOU Qing-qing SHEN Li SUN Zi-lin ZHAO Fang DAI Xia HUANG Jin yang hui-ying Department of Endocrinology Peking University First HospitalBeijing 100034 China Department of Endocrinology West China Medical School WestChina Hospital Sichuan University Chengdu 610041 China Department of Endocrinology Sir Run Run Shaw HospitalHangzhou Zhejiang 310016 China Institute of Diabetes Zhongda Hospital Medical School SoutheastUniversity Nanjing Jiangsu 210009 China Department of Endocrinology China-Japan Friendship HospitalBeijing 100029 China Department of Endocrinology First Affiliated Hospital GuangxiMedical University Nanning Guangxi 530021 China Nursing Department Second Xiangya Hospital of Central SouthUniversity Changsha Hunan 410011 China Department of Endocrinology and Metabolism First AffiliatedHospital of Kunming Medical College Kunming Yunnan 650032China

Background Diabetes management could be improved by diabetes education, through influencing attitudes towards diabetes, knowledge and behaviors of patients. The purpose of this study was to characterize the impact of diabetes education on glycemic control, and to assess the attitude, knowledge and self-care behavior in patients with type 2 diabetes in China. Methods This questionnaire-based survey was conducted in 50 medical centers across China from April to July of 2010. The patients with type 2 diabetes were eligible for the study. The information of glycemic control and diabetes education was collected. The diabetes attitude scale-3 formulae, a questionnaire of diabetes knowledge and Summary of Diabetes Self-care Activities scale were used to assess attitude, knowledge and the self-care of patients, respectively. Results Among the 5961 eligible respondents （3233 males; mean age （59.50＋12.48） years; mean hemoglobin Alc （HbAlc）（8.27＋2.23）%）, most patients （79.8%） considered themselves educated on diabetes. Compared with patients without diabetes education, their educated counterparts showed significant lower value of HbAlc, after controlling for age, gender, body mass index and duration of diabetes （P 〈0.01）. The patients who received diabetes education also performed significant higher scores on attitude, knowledge and self-care than their uneducated counterparts. Patients with lower income or education level tended to have higher glucose levels, and showed lower percentage of patients received diabetic education. Conclusions Chinese patients with diabetes education achieved better glycemic control than un-educated patients. Our study indicates effort is required to provide professional education to patients, with emphasis on lower income and lower education level populations.

关键词： diabetes education self-management glycemic control

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维索尔伦的语用顺应论与翻译的选择和顺应

兰州大学学报（社会科学版） 2012年第2期40卷 56-60页

作者：杨惠英西北工业大学人文经法学院陕西西安710072

维索尔伦的语用顺应理论认为,语言使用的过程是一个基于语言内部与外部原因,在不同意识程度下不断做出语言选择的顺应过程。以此为研究视角和探讨的理论基础,指出翻译行为不仅是一个连续不断的选择和顺应的意识行为,也是实施这一意识行... 详细信息

维索尔伦的语用顺应理论认为,语言使用的过程是一个基于语言内部与外部原因,在不同意识程度下不断做出语言选择的顺应过程。以此为研究视角和探讨的理论基础,指出翻译行为不仅是一个连续不断的选择和顺应的意识行为,也是实施这一意识行为的动态过程。选择和顺应不仅体现出翻译行为的特点和复杂性,同时也体现出从多角度和多层次的视域阐释和指导翻译行为的过程和原则。

关键词：维索尔伦翻译语用顺应论意识行为顺应选择