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Integrating MODIS LST and Sentinel-1 InSAR to monitor frozen soil deformation in the Qumalai-Zhiduo area, Qinghai-Tibet Plateau .

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International Journal of Digital Earth 2023年第1期16卷 1923-1943页

作者： Wenyan Yu mi jiang Xiao Cheng School of Geospatial Engineering and Science Sun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)ZhuhaiPeople’s Republic of China Key Laboratory of Comprehensive Observation of Polar Environment(Sun Yat-sen University) Ministry of EducationZhuhaiPeople’s Republic of China

Owing to continuous global warming,frozen soil degradation has become a universal phenomenon,leading to large-scale ground deformation that affects engineering construction and the fragile ecological *** observations,especially temporal InSAR,can quantify ground ***,the accuracy of InSAR modelling in capturing the spatial–temporal variability of the freeze–thaw process depends on the spatial resolution of temperature *** paper proposes a freeze–thaw amplitude model incorporating MODIS LST based on a single-master InSAR time-series deformation to calculate frozen soil *** applied this model to the Qumalai-Zhiduo area of the Qinghai-Tibet Plateau and compared its results with those of the model using weather station temperature in terms of frozen soil deformation parameters,RSME,and characteristic *** study found that the model incorporating MODIS LST performed better in areas far from weather stations,while both models produced similar results in areas of close ***,we evaluated another commonly used method for calculating frozen soil deformation parameters and found that the method incorporating MODIS LST based on a single-master time-series deformation is more accurate and precise than the method based on a multi-master SBAS network.

关键词： InSAR deformation monitoring Qinghai Tibet plateau MODIS LST frozen soil

Ocean tide loading correction for InSAR measurements: Comparison of different ocean tide models

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Geodesy and Geodynamics 2022年第2期13卷 170-178页

作者： Zhou Wu mi jiang Ruya Xiao Jing Xu School of Earth Science and Engineering Hohai UniversityNanjing211100JiangsuChina School of Geospatial Engineering and Science Sun Yat-Sen UniversityGuangzhou510275China

With the rapid development of modern Interferometric Synthetic Aperture Radar(InSAR)missions,SAR instruments with wider coverage can be used to monitor the ground surface deformation from regional to global ***,the ocean tide loading(OTL)displacement is becoming a primary source of *** contributes to a long-wavelength signal in InSAR interferograms,leading to errors from millimeter to centimeter-level in InSAR deformation monitoring,especially over coastal *** the state-of-the-art has applied ocean tide models to mitigate the errors,the difference between them and their impact on InSAR measurements are rarely *** this paper,we compare representative ocean tide models and investigate their effects in the correction of OTL *** found that(i)the modeled OTL displacements from different models show little difference over interiors far from the ocean,while disagreement becomes larger over coastal areas;(ii)the magnitude of OTL artifacts may be greater than the atmospheric delays in some coastal areas,and the correction using ocean tide models can effectively attenuate the OTL effects for large-scale InSAR measurements;(iii)when correcting the OTL errors for InSAR measurements,the global model TPXO and FES are recommended because of their better overall performance,while the NAO model performs the *** local models with high spatial resolution can help improve the capability of coarse global models in complex topographic areas.

关键词： InSAR Large-scale InSAR Ocean tide loading Ocean tide models

Ultra-Pure Ferritic Stainless Steels-Grade,Refining Operation,and Application

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Journal of Iron and Steel Research International 2007年第4期14卷 24-30页

作者： YOU Xiang-mi jiang Zhou-hua LI Hua-bing School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

The grades of ultra-pure ferritic stainless steels, especially the grades used in automobile exhaust system, were reviewed. The dependence of properties on alloying elements, the refining facilities, and the mechanism of the reactions in steel melts were described in detail. Vacuum, strong stirring, and powder injection proved to be effective technologies in the melting of ultra-pure ferritic stainless steels. The application of the ferritic grades was also briefly introduced.

关键词： ultra-pure ferritic stainless steel interstitial element stabilizing element automobile exhaust system SS-VOD VOD-PB VCR

Inferring decelerated land subsidence and groundwater storage dynamics in Tianjin–Langfang using Sentinel-1 InSAR

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International Journal of Digital Earth 2022年第1期15卷 1526-1546页

作者： Xuguo Shi Tongtong Zhu Wei Tang mi jiang Houjun jiang Chen Yang Wei Zhan Zutao ming Shaocheng Zhang School of Geography and Information Engineering China University of GeosciencesWuhanPeople’s Republic of China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijingPeople’s Republic of China School of Geospatial Engineering and Science Sun Yat-Sen UniversityGuangzhouPeople’s Republic of China School of Civil Engineering Anhui Jianzhu UniversityHefeiPeople’s Republic of China Institute of Karst Geology CAGS/Key Laboratory of Karst DynamicsMNR&GZARGuilinPeople’s Republic of China The First Monitoring and Application Center China Earthquake AdministrationTianjinPeople’s Republic of China

To meet the growing demand for socioeconomic development,a large amount of groundwater is extracted from confined aquifers *** North China Plain has experienced considerable groundwater depletion and subsidence during the past six *** this study,we use Sentinel-1A/B SAR images from 2015 to 2020 to map the ground subsidence of the Tianjin–Langfang *** subsiding zones centered at Guangyang,Wuqing–Bazhou,and Jinghai are identified with maximum subsidence rates of 98.1,121.8,and 104.7 mm/*** and long-term signals are separated from time series subsidence and hydraulic measurements using continuous wavelet transform to retrieve aquifer *** long-term subsidence,which fits well with an exponential decaying model,remarkably slows down in our study *** elastic skeletal storage coefficients range between 0.52×10−3 and 9.66×10−*** then retrieve the spatial–temporal variations of total groundwater storage,recoverable groundwater storage,and irreversible groundwater *** storage depletion rates are apparently reducing,which benefits from the operation of the South-to-North Water Transfer Project and local groundwater management practices.

关键词： North China Plain aquifer parameter South-to-North water transfer project groundwater storage subsidence

极化SAR参数优化与光学波谱相结合的面向对象土地覆盖分类

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测绘学报 2019年第5期48卷 609-617页

作者：赵诣蒋弥河海大学地球科学与工程学院江苏南京211100

提出一种基于极化参数优化的面向对象分类方法。该方法结合光学和SAR数据,有效提高了对地物的识别能力。本文方法的关键在于:在■分解中,使用光学影像指导SAR影像选择同质点,使其更精确地估计极化参数并结合光学波谱信息作为输入特征;... 详细信息

提出一种基于极化参数优化的面向对象分类方法。该方法结合光学和SAR数据,有效提高了对地物的识别能力。本文方法的关键在于:在■分解中,使用光学影像指导SAR影像选择同质点,使其更精确地估计极化参数并结合光学波谱信息作为输入特征;使用面向对象的分类方法,仅将光学影像作为分割输入,避免SAR噪声引起的分割错误。以美国Bakersfield地区的Sentinel-1/2数据为例,确定7种地物类型,对比分析不同输入与不同分类器对分类结果的影响。研究表明,优化输入参数在纹理丰富区域能够有效提高分类精度;面向对象的分类结果更加稳定并较好地维持地表几何特征;改进分类方法较传统分类方法总体精度提高了近10%,达到92.6%。

关键词：合成孔径雷达极化多光谱数据融合面向对象土地覆盖分类

Copper-Catalyzed Enantioselective Synthesis of α-Hydroxyamine Using Monodentate Phosphoramidites

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有机化学 2004年第Z1期24卷 43-44页

作者： DONG,Lin CUN,Lin-Feng GONG,Liu-Zhu mi,Ai-Qiao jiang,Yao-Zhong Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province and Union Laboratory of Asymmetric Synthesis Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province and Union Laboratory of Asymmetric Synthesis Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province and Union Laboratory of Asymmetric Synthesis Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province and Union Laboratory of Asymmetric Synthesis Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province and Union Laboratory of Asymmetric Synthesis Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041

　　Development of new methods for the introduction of a nitrogen atom to a carbonyl group is still the most important synthetic target. Cu-catalyzed addition of organozinc reagents to α,β-unsaturated carbonyl compounds has been the subject of intensive investigation.[1] Moreover, trapping of the intermediate Zn-enolates has been achieved using nitrosobenzene. To demonstrate the feasibility of developing enantioselective variants of these tandem C-C bond formations,α,β-unsaturated substrates a～d was subjected to standard reaction conditions using Feringa's (L1*, L2*) and our own phosphoramidite ligands (L3*, L4*). In this reaction, medium to high levels of enantioselectivities were observed.……

关键词： carbonyl compounds methods for

Integration of SAR Polarimetric Features and Multi-spectral Data for Object-Based Land Cover Classification

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Journal of Geodesy and Geoinformation Science 2019年第4期2卷 64-72页

作者： Yi ZHAO mi jiang Zhangfeng MA School of Earth Sciences and Engineering Hohai UniversityNanjing 211100China

An object-based approach is proposed for land cover classification using optimal polarimetric *** ability to identify targets is effectively enhanced by the integration of SAR and optical *** innovation of the presented method can be summarized in the following two main points:①estimating polarimetric parameters(H-A-Alpha decomposition)through the optical image as a driver;②a multi-resolution segmentation based on the optical image only is deployed to refine classification *** proposed method is verified by using Sentinel-1/2 datasets over the Bakersfield area,*** results are compared against those from pixel-based SVM classification using the ground truth from the National Land Cover Database(NLCD).A detailed accuracy assessment complied with seven classes shows that the proposed method outperforms the conventional approach by around 10%,with an overall accuracy of 92.6%over regions with rich texture.

关键词： synthetic aperture radar(SAR) polarimetric multispectral data fusion object-based land cover classification

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论唐代的官吏贪赃问题

西北师大学报（社会科学版） 2012年第2期49卷 83-88页

作者：姜密河北师范大学法律系河北石家庄050091

古往今来,官吏贪赃为害无穷。唐代从前期到后期,经历了盛衰之变,官吏贪赃及其惩治特点前后不同。唐前期,吏治清明,法律发挥着积极作用;后期,两税法的实行、商品经济相对活跃、进奉盛行等因素导致贪赃增多,法不责众。集权体制下,君主权... 详细信息

古往今来,官吏贪赃为害无穷。唐代从前期到后期,经历了盛衰之变,官吏贪赃及其惩治特点前后不同。唐前期,吏治清明,法律发挥着积极作用;后期,两税法的实行、商品经济相对活跃、进奉盛行等因素导致贪赃增多,法不责众。集权体制下,君主权其轻重,法律在应然和实然间存在差距。

关键词：唐代官吏贪赃

2008—2020年宋代土地制度史研究综述

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中国史研究动态 2021年第3期 26-38页

作者：姜密河北师范大学法政与公共管理学院河北石家庄050024

《中国社会科学》(2020年第1期)编辑部组织六位专家以"唯物史观视阈下的中国古代土地制度变迁"为题,撰写系列文章深入探讨战国至明清与土地制度变迁密切相关的主要问题。"这是继史学界‘五朵金花’问题讨论之后,又一次集中性地讨论中国... 详细信息

《中国社会科学》(2020年第1期)编辑部组织六位专家以"唯物史观视阈下的中国古代土地制度变迁"为题,撰写系列文章深入探讨战国至明清与土地制度变迁密切相关的主要问题。"这是继史学界‘五朵金花’问题讨论之后,又一次集中性地讨论中国古代土地制度问题。"(第154页)该组文章的编者按说道:"深入剖析研究历史上的土地制度,是理解历史、认识历史、阐释历史的基础,更是理解、认识、阐释文化血脉、文明基因、制度体系。

关键词：土地制度变迁集中性文化血脉《中国社会科学》深入剖析视阈下