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Decomposing and mapping different scales of land subsidence over Shanghai with X-and C-Band SAR data stacks

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International Journal of Digital Earth 2022年第1期15卷 478-502页

作者： Ru Wang Mengshi yang tianliang yang Jinxin Lin Mingsheng Liao State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanPeople’s Republic of China School of Earth Sciences Yunnan UniversityKunmingPeople’s Republic of China Key Laboratory of Land Subsidence Monitoring and Prevention Ministry of Land and ResourcesShanghaiPeople’s Republic of China Shanghai Institute of Geological Survey ShanghaiPeople’s Republic of China

Land subsidence can be observed with time-series of Interferometric Synthetic Aperture Radar(InSAR)***,existing approaches only reveal subsidence signals that are multi-scale mixed,which is not conducive to the systematic analysis of subsidence of different mechanisms.A deformation signal decomposition(DSD)method based on spectral analysis is used to decompose the deformation extracted by time-series InSAR into three classes of deformation *** refer to large-scale deformation related to geological settings,medium-scale deformation caused more by group excavation,and small-scale deformation along linear ***-X datasets for Shanghai spanning April 2013 to September 2020,and Sentinel-1A datasets spanning January 2016 to September 2020 are used in this *** results were cross-verified between the TerraSAR-X and Sentinel-1A datasets,and validated against levelling *** signals caused by different mechanisms were automatically decomposed,which facilitates a systematic analysis for targeted diagnosis of land subsidence signals.A detailed analysis was conducted jointly at three scales of surface displacement,geological conditions,major construction activities,and subsidence *** indicated that construction activities were the leading cause of land subsidence,and suggests that local authorities that wish to mitigate surface subsidence may benefit from primarily considering this process.

关键词： Deformation decomposition land subsidence time-series InSAR Shanghai

烟气再循环对350 MW CFB锅炉深调运行特性影响

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洁净煤技术 2024年第9期30卷 68-76页

作者：王家兴彭建升李凡贺建平杨天亮董永胜王帅烟台龙源电力技术股份有限公司山东烟台264006 哈尔滨工业大学能源科学与工程学院黑龙江哈尔滨150006 神华神东电力山西河曲发电有限公司山西忻州036501

为解决超临界CFB锅炉超低负荷时流化安全性及NO_(x)超低排放,引入烟气再循环技术,以某电厂超临界350 MW CFB锅炉为研究对象,搭建了循环半干法脱硫后烟气的再循环辅助调峰系统,基于运行实测数据,研究该锅炉在30%~60%负荷率下烟气再循环... 详细信息

为解决超临界CFB锅炉超低负荷时流化安全性及NO_(x)超低排放,引入烟气再循环技术,以某电厂超临界350 MW CFB锅炉为研究对象,搭建了循环半干法脱硫后烟气的再循环辅助调峰系统,基于运行实测数据,研究该锅炉在30%~60%负荷率下烟气再循环对平均床温、分离器入口温度、排烟温度、炉膛出口烟气NO_(x)、CO质量浓度、飞灰及底渣可燃物含量、汽水参数等运行参数的影响,试验结果表明:烟气再循环协同下,30%~60%负荷SNCR脱硝后NO_(x)最终排放小于50 mg/m^(3),30%负荷实现锅炉原始NO_(x)超低排放;床温降低15~22℃,炉膛出口烟温提高10~13℃,主再热汽温在558℃以上;随锅炉负荷降低,飞灰及底渣含碳量升高,CO质量浓度未见大幅增加;40%负荷炉膛二次风SNCR脱硝NO_(x)降幅约15 mg/m^(3);负荷上升/下降变化最小速率1.23%Pe;30%负荷及以上保持干态运行,水冷壁壁温最大偏差55℃,屏过及屏再最大壁温差分别55、47℃,均未出现壁温超温。

关键词：超临界循环流化床锅炉深度调峰烟气再循环 NO_(x)超低排放锅炉运行特性

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Impact,Mechanism,Monitoring of Land Subsidence in Coastal Cities(Annual Work of IGCP 663)

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Acta Geologica Sinica(English Edition) 2019年第S01期93卷 158-159页

作者： YAN Xuexin yang tianliang XU Yan Luigi TOSI Esther STOUTHAMER Heri ANDREAS LIN Jinxin HUANG Xinlei Key Laboratory of Land Subsidence Monitoring and Prevention Ministry of Land and ResourcesShanghai 200072China Shanghai Institute of Geological Survey Shanghai 200072China Shanghai Engineering Technology Research Center of Land Subsidence Shanghai 200072China Institute of Marine Sciences National Research CouncilArsenale Tesa104-Castello 2737/F30122-VeniceItaly Institute of Geosciences and Earth Resources National Research Councilvia G.Gradenigo635131-PaduaItaly Department of Physical Geography Faculty of GeosciencesUtrecht University3584 CSUtrechtthe Netherlands Geodesy Research Division Institute of Technology BandungBandung 40132Indonesia

Land subsidence is a worldwide geohazard consisting in the lowering of the ground surface due to natural and human-induced processes occurring in the shallow and deep *** the last two decades,land subsidence has caused damages and widespread impacts to a variety of infrastructures in coastal cities(Ma et al.,2011;Liu et al.,2016;Minderhoud et al.,2018).

关键词： land subsidence coastal cities case studies reclaimed soil

Glaucoma surgery experiments using digital microscope-integrated optical coherence tomography and OCT-compatible instruments

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Journal of Innovative Optical Health Sciences 2024年第5期17卷 105-113页

作者： tianliang Jiang Jinyu Fan Ning Tang Yi He Guohua Shi School of Biomedical Engineering(Suzhou)Division of Life Sciences and Medicine University of Science and Technology of China Hefei 230026 P.R.China Jiangsu Key Laboratory of Medical Optics Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Science Suzhou 215163P.R.China

There is a certain failure rate in traditional glaucoma surgery because of the lack of depth information in microscope *** this work,we present a digital microscope-integrated optical coherence tomography(MIOCT)system and several custom-made OCT-compatible instruments for glaucoma *** ophthalmologists were asked to perform trabeculectomy and canaloplasty on live porcine eyes using the system and *** surgery,a subjective feedback survey about the user experience was *** experiment results showed that our system can help surgeons easily locate important tissue structures during *** custom-made instruments also solved the shadowing problem in OCT *** preferred to use the system in their future practice.

关键词： Microscope-integrated optical coherence tomography OCT-compatible instruments glaucoma surgery trabeculectomy canaloplasty

Recent Enhanced Deep Troposphere-to-Stratosphere Air Mass Transport Accompanying the Weakening Asian Monsoon

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Journal of Meteorological Research 2024年第4期38卷 708-719页

作者： Bin CHEN Jianzhong MA Wei ZHANG Jianchun BIAN tianliang ZHAO Xiangde XU State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing100081China Department of Plants Soils and ClimateUtah State UniversityUT84322USA Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological AdministrationNanjing University of Information Science&TechnologyNanjing 210044China

The Asian monsoon(AM) region is a well-known region with prevailing stratosphere–troposphere exchange(STE).However,how the STE across this region changes with the weakening AM remains ***,we particularly diagnose the air mass transport between the planetary boundary layer(PBL) and the stratosphere over the AM region during 1992–2017 using the Lagrangian particle dispersion model FLEXPART based on the ERA-Interim reanalysis *** results show that both the downward and upward deep STEs exhibit a detectable increasing trend,while the latter,namely,the deep troposphere-to-stratosphere transport(DTST),is relatively more *** analysis reveals that the long-term trend of DTST over the AM region could be partly attributed to changes in the Pacific Walker circulation and the air temperature(especially at upper levels).Additionally,it is found that DTST increases markedly over the tropical oceanic regions,while the increasing DTST into the stratosphere can be attributed to the enhanced air masses originated from the PBL over the terrestrial regions,where large amounts of pollutant emissions *** results imply that the influence of the DTST on the chemical composition and the climate of the stratosphere over the AM region is expected to become increasingly important,and is thereby of relevance to climate projection in an evolving climate.

关键词： stratosphere–troposphere exchange(STE) air mass transport deep troposphere-to-stratosphere transport(DTST) Asian monsoon(AM) pollution

Advances and Practices on the Research, Prevention and Control of Land Subsidence in Coastal Cities

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Acta Geologica Sinica(English Edition) 2020年第1期94卷 162-175页

作者： YAN Xuexin yang tianliang XU Yan Luigi TOSI Esther STOUTHAMER Heri ANDREAS Philip MINDERHOUD Anirut LADAWADEE Ramon HANSSEN Gilles ERKENS Pietro TEATINI LIN Jinxin Roberta BONì Jarinya CHIMPALEE HUANG Xinlei Cristina Da LIO Claudia MEISINA Francesco ZUCCA Key Laboratory of Land Subsidence Monitoring and Prevention Ministry of Nature Resources of ChinaShanghai 200072China Shanghai Institute of Geological Survey Shanghai 200072China Shanghai Engineering Research Center of Land Subsidence Shanghai 200072China Center for Land Subsidence of China Geological Survey Shanghai 200072China Institute of Geosciences and Earth Resources National Research CouncilVia G.Gradenigo 6Padova 35131Italy Land Subsidence International Initiative(LASII) UNESCOParisFrance Department of Physical Geography Faculty of GeosciencesUtrecht UniversityPrincetonlaan 8A3584 CSUtrechtThe Netherlands Geodesy Research Division Institute of Technology BandungBandung 40132Indonesia Deltares Research Institute Daltonlaan 6003584 BK UtrechtThe Netherlands Department of Groundwater Resources Ministry of Natural Resources and EnvironmentLatyaoChatuchak Bangkok 10900Thailand Delft University of Technology Faculty of Civil Engineering and GeosciencesStevinweg 12628 CNDelftThe Netherlands Department of Civil Environmental and Architectural EngineeringUniversity of PadovaVia Marzolo 9Padova 35131Italy Earth&Environmental Sciences Dept.University of Pavia Pavia 27100Italy Institute of Marine Sciences National Research CouncilArsenale Tesa104-Castello 2737/FVenice 30122Italy

Land subsidence severely threatens most of the coastal plains around the world where high productive industrial and agricultural activities and urban centers are concentrated. Coastal subsidence damages infrastructures and exacerbates the effect of the sea-level rise at regional scale. Although it is a well-known process, there is still much more to be improved on the monitoring, mapping and modeling of ground movements, as well as the understanding of controlling mechanisms. The International Geoscience Programme recently approved an international project(IGCP 663) aiming to bring together worldwide researchers to share expertise on subsidence processes typically occurring in coastal areas and cities, including basic research, monitoring and observation, modelling and management. In this paper, we provide the research communities and potential stakeholders with the basic information to join the participating teams in developing this project. Specifically, major advances on coastal subsidence studies and information on well-known and new case studies of land subsidence in China, Italy, The Netherlands, Indonesia, Vietnam and Thailand are highlighted and summarized. Meanwhile, the networking, dissemination, annual meeting and field trip are briefly introduced.

关键词： land subsidence coastal cities case studies International Geoscience Programme

盾构机出洞口土体搅拌桩加固对地连墙变形影响的分析

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现代隧道技术 2009年第6期46卷 70-72页

作者：杨天亮中煤三建天津公司天津300400

由于在盾构出洞口水泥土搅拌桩的加固过程中产生的土体膨胀,对地连墙的侧压变形有一定的影响,如果侧墙内的土体再同时开挖,将会失去对墙体的支撑,使墙体产生过快的变形,其钢支撑的轴力将会不断地加大,对深基坑施工将造成极大的危险。文... 详细信息

由于在盾构出洞口水泥土搅拌桩的加固过程中产生的土体膨胀,对地连墙的侧压变形有一定的影响,如果侧墙内的土体再同时开挖,将会失去对墙体的支撑,使墙体产生过快的变形,其钢支撑的轴力将会不断地加大,对深基坑施工将造成极大的危险。文章针对盾构机出洞口水泥土搅拌桩加固和端头井主体土方开挖同时施工对地连墙变形的影响进行了分析,意在引起同位置施工对工程可能造成重大安全隐患的注意。

关键词：盾构出洞口土体加固主体开挖地连墙变形

Spatial distribution of soil salinization under the influence of human activities in arid areas, China

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Journal of Arid Land 2024年第10期16卷 1344-1364页

作者： LIU Yufang yang Qingwen PEI Xiangjun LI Jingji WANG Shuangcheng HUANG Zhenfu HAN Wei ZHENG tianliang College of Ecology and Environment Chengdu University of Technology Tianfu Yongxing Laboratory Hydrogeological and Engineering Geological Team of Xinjiang Bureau of Geo-Exploration & Mineral Development

The Hotan Prefecture of Xinjiang Uygur Autonomous Region, China belongs to arid desert climate, with significant soil salinization issues. The study selected six rivers in Hotan Prefecture（Pishan, Qaraqash, Yurungqash, Celle, Kriya, and Niya rivers） to explore the spatial distribution of soil salinization in this area and its underlying mechanisms. Sampling was conducted along each river's watershed, from the Gobi in the upper reaches, through the anthropogenic impact area in the middle reaches, to the desert area in the lower reaches. Soil physical-chemical indicators, including total soluble salts, pH, K+, Na+, Ca2+, Mg2+, SO42–, Cl–, CO32–, HCO3–, organic matter, available nitrogen, available phosphorus, and available potassium, were tested, along with the total dissolved solids of surface water and groundwater. The results revealed that the soil water and nutrient contents in anthropogenic impact area were higher than those in Gobi and desert areas, while the p H and total soluble salts were lower than those in Gobi and desert areas. The ions in the soil of the study area were primarily Cl–, SO42–, K+, and Na+, and the ion concentration of soil salt were positively correlated with surface water and groundwater. Overall, the study area exhibited low soil water content, low clay content, infertile soil, and high soil salinization, dominated by weak to moderate chloride-sulfate types. Compared with Gobi and desert areas, the soil in anthropogenic impact area had higher soil water content, lower p H, lower soluble salts, and higher nutrients, indicating that human farming activities help mitigate salinization. These findings have practical implications for guiding the scientific prevention and control of soil salinization in the arid areas and for promoting sustainable agricultural development.

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闽台产业集聚中持续创新链的培育研究——以TFT-LCD产业为例

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中国科技论坛 2009年第5期 49-52,95页

作者：杨天亮朱斌福州大学软科学研究所福建福州350002

本文对闽台TFT-LCD产业集聚中持续创新链的培育情况进行了研究,从创新供需链、创新企业链、创新空间链、创新技术链、创新价值链五个维度分析了TFT-LCD产业持续创新链的现状;剖析了闽台TFT-LCD产业各条链存在的问题;在此基础上,提出了... 详细信息

本文对闽台TFT-LCD产业集聚中持续创新链的培育情况进行了研究,从创新供需链、创新企业链、创新空间链、创新技术链、创新价值链五个维度分析了TFT-LCD产业持续创新链的现状;剖析了闽台TFT-LCD产业各条链存在的问题;在此基础上,提出了升级企业联盟、实践高端价值理念等促进闽台TFT-LCD产业持续创新链发展的策略。

关键词：持续创新链 TFT-LCD 产业集聚