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Retrieval of high spatial resolution mountainous land surface temperature considering topographic and adjacency effects

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Science China Earth Sciences 2024年第11期67卷 3610-3625页

作者： Zhiwei HE Bohui TANG zhaoliang li Faculty of Land Resources Engineering Kunming University of Science and Technology Key Laboratory of Plateau Remote Sensing Department of Education of Yunnan Province State Key Lab of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences Key Laboratory of Agricultural Remote Sensing Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

Land surface temperature(LST) is a key parameter reflecting the interaction between land and atmosphere. Currently,thermal infrared(TIR) quantitative remote sensing technology is the only means to obtain large-scale, high spatial resolution LST. Accurately retrieving high spatial resolution mountainous LST(MLST) plays an important role in the study of mountain climate change. The complex terrain and strong spatial heterogeneity in mountainous areas change the geometric relationship between the surface and satellite sensors, affecting the radiation received by the sensors, and rendering the assumption of planar parallelism invalid. In this study, considering the influence of complex terrain in mountainous areas on atmospheric downward radiation and the thermal radiation contribution of adjacent pixels, a mountainous TIR radiative transfer model based on the sky view factor was developed. Combining with the atmospheric radiative transfer model MODTRAN 5.2, a nonlinear generalized split-window algorithm suitable for high spatial resolution MLST retrieval was constructed and applied to Landsat-9 TIRS-2satellite TIR remote sensing data. The analysis results indicate that neglecting the topographic and adjacency effects would lead to significant discrepancies in LST retrieval, with simulated data showing LST differences of up to 2.5 K. Furthermore, due to the lack of measured MLST in the field, the MLST accuracy obtained by this retrieval method was indirectly validated using the currently recognized highest-accuracy forward 3D radiative transfer model DART. The MLST and emissivity were input into the DART model to simulate the brightness temperature at the top of the atmosphere(TOA) of Landsat-9 band 10, and compared with the brightness temperature at TOA of Landsat-9 band 10. The RMSE(Root Mean Square Error) for the two subregions was0.50 and 0.61 K, respectively, indicating that the method proposed can retrieve high-precision MLST.

关键词： Mountainous land surface temperature Topographic and adjacency effects Nonlinear generalized split-window algorithm Landsat-9 data DART model

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定距引信地磁感应盲区的自适应辨识与转数补偿

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探测与控制学报 2024年第5期46卷 8-12,21页

作者：李兆亮田东辰李勇刘秋生北京理工大学机电学院北京100081

针对基于弹丸滚转地磁感应的定距空炸引信,当飞行穿越地磁感应盲区时,产生弹丸滚转信息漏检和计转数误差,从而造成较大定距偏差的问题,提出了一种基于弹丸滚转衰减自适应滑窗检测的盲区识别与转数补偿方法。根据建立的四自由度弹道方程... 详细信息

针对基于弹丸滚转地磁感应的定距空炸引信,当飞行穿越地磁感应盲区时,产生弹丸滚转信息漏检和计转数误差,从而造成较大定距偏差的问题,提出了一种基于弹丸滚转衰减自适应滑窗检测的盲区识别与转数补偿方法。根据建立的四自由度弹道方程、射击诸元,以及弹丸滚转衰减变化,确定地磁盲区转速辨识阈值和自适应滑窗时间;通过实时检测滑窗内计转数变化,识别盲区以及计算补偿盲区转数。以典型小口径防空弹药为例,通过定距空炸引信模拟弹道环境下地磁感应检测电路的感应信号仿真,验证了该方法的有效性,补偿前后计转数相对误差平均降低了40.54%。

关键词：地磁场地磁感应盲区自适应滑窗定距空炸引信

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计算流体力学在颅内动脉瘤中的研究进展

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中华神经外科疾病研究杂志 2024年第3期18卷 81-85页

作者：李照亮朱卿苏州大学附属第二医院神经外科江苏苏州215004

计算流体力学作为一种研究血流动力学的辅助工具,尽管在观察颅内动脉瘤发生、发展,评估破裂风险等方面具有重要作用,但目前仍有许多值得探讨之处。本文旨在归纳计算流体力学在颅内动脉瘤相关研究中的历史、应用及与三维打印技术的结合,... 详细信息

计算流体力学作为一种研究血流动力学的辅助工具,尽管在观察颅内动脉瘤发生、发展,评估破裂风险等方面具有重要作用,但目前仍有许多值得探讨之处。本文旨在归纳计算流体力学在颅内动脉瘤相关研究中的历史、应用及与三维打印技术的结合,探讨其对临床实际工作的指导意义。

关键词：颅内动脉瘤血流动力学计算流体力学三维打印模型

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Soil-Vegetation-Atmosphere Radiative Transfer Model in Microwave Region

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Chinese Geographical Science 2008年第2期18卷 171-177页

作者： JIA Yuanyuan li zhaoliang Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China Academy of Opto-Electronics Chinese Academy of Sciences Beijing 100080 China LSIIT/ENSPS Pare d＇Innovation Bld Sebastien Brant BP10413 67412 Illkirch France

The radiative transfer is one of the significant theories that describe the processes of scattering, emission, and absorption of electromagnetic radiant intensity through scattering medium. It is the basis of the study on the quan-titative remote sensing. In this paper, the radiative characteristics of soil, vegetation, and atmosphere were described respectively. The numerical solution of radiative transfer was accomplished by Successive Orders of Scattering (SOS). A radiative transfer model for simulating microwave brightness temperature over land surfaces was constructed, de-signed, and implemented. Analyzing the database generated from soil-vegetation-atmosphere radiative transfer model under Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) configuration showed that the atmospheric effects on microwave brightness temperature should not be neglected, particularly for higher frequency, and can be parameterized. At the same time, the relationship between the emissivities of the different channels was developed. The study results will promote the development of algorithm to retrieve geophysical parameters from mi-crowave remotely sensed data.

关键词： soil-vegetation-atmosphere system radiative transfer model microwave remote sensing

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地表温度热红外遥感反演难点及研究进展

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高科技与产业化 2024年第7期30卷 6-7页

作者：李召良向鹏(整理) 不详

近日,由北京师范大学地理科学学部、遥感科学国家重点实验室、北京市陆表遥感数据产品工程技术研究中心主办,北京师范大学地理科学学部遥感科学与工程研究院承办的“第十四届陆表卫星遥感数据反演理论与方法暑期学校”如期召开。中国农... 详细信息

近日,由北京师范大学地理科学学部、遥感科学国家重点实验室、北京市陆表遥感数据产品工程技术研究中心主办,北京师范大学地理科学学部遥感科学与工程研究院承办的“第十四届陆表卫星遥感数据反演理论与方法暑期学校”如期召开。中国农业科学院农业资源与农业区划研究所研究员、中国科学院地理科学与资源研究所研究员李召良在本届暑期学校中围绕“地表温度热红外遥感反演”做了报告,以下为报告内容节选。

关键词：暑期学校中国科学院国家重点实验室热红外遥感中国农业科学院地表温度工程技术研究中心农业区划研究所

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Agricultural Non-point Source Pollution in China:Evaluation,Convergence Characteristics and Spatial Effects

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Chinese Geographical Science 2021年第3期31卷 571-584页

作者： QIU Wenwen ZHONG Zhangbao li zhaoliang School of literature Law and EconomicsWuhan University of Science and TechnologyWuhan 430081China Research Center for Rural Social Construction and Management Huazhong Agricultural UniversityWuhan 430070China College of Law and Business Wuhan Institute of TechnologyWuhan 430205China

In this study,an inventory analysis approach was used to investigate the intensity of agricultural non-point source pollution(ANSP)and its spatial convergence at national and provincial levels in China from 1999 to *** this basis,spatial factors affecting ANSP were explored by constructing a spatial econometric *** results indicate that:1)The intensity of China's ANSP emission showed an overall upward trend and an obvious spatial difference,with the values being high in the eastern and central regions and relatively low in the western region.2)Significant spatial agglomeration was shown in China's ANSP intensity,and the agglomeration effect was increasing gradually.3)In the convergence analysis,a spatial lag model was found applicable for interpretation of the ANSP intensity,with the convergence rate being accelerated after considering the spatial factors but slower than that of regional economic growth.4)The spatial factors affecting the ANSP intensity are shown to be reduced by improving agricultural infrastructure investment,labor-force quality,and crop production ratio,while the expansion of agricultural economy scale and precipitation and runoff have positive impact on ANSP in the study ***,agricultural research and development(R&D)investment showed no direct significant effect on the ANSP ***,improving the quality of the labor force would significantly reduce the ANSP intensity in the surrounding areas,while the precipitation and runoff would significantly increase the pollution of neighboring *** research has laid a theoretical basis for formulation and optimization of ANSP prevention strategies in China and related regions.

关键词： intensity of agricultural non-point source pollution spatial effects inventory analysis spatial econometric model βconvergence

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The influence of urban three-dimensional structure and building greenhouse effect on local radiation flux

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Science China Earth Sciences 2021年第11期64卷 1934-1948页

作者： Renhua ZHANG Wenhui KUANG Shiqi YANG zhaoliang li Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China

Accurate measurements of the three-dimensional structure characteristics of urban buildings and their greenhouse effect are important for evaluating the impact of urbanization on the radiation energy budget and research on the urban heat island(UHI)*** decrease in evapotranspiration or the increase in sensible heat caused by urbanization is considered to be the main cause of the UHI effect,but little is known about the influence of the main factor“net radiant flux”of the urban surface heat *** this study,experimental observation and quantitative model simulation were used to find that with the increase of building surface area after urbanization,the direct solar radiation flux and net radiation flux on building surface areas changed *** order to accurately quantify the relationship between the positive and negative effects,this study puts forward the equivalent calculation principle of“aggregation element”,which is composed of a building’s sunny face and its shadow face,and the algorithm of the contribution of the area to thermal *** research clarifies the greenhouse effect of a building with walls of glass *** shows that when the difference between absorption rates of a concrete wall and grass is−0.21,the cooling effect is *** the case of concrete walls with glass windows,the difference between absorption rates of a building wall and grass is−0.11,which is also a cooling *** greenhouse effect value of a building with glass windows reduces the cooling effect value to 56%of the effect of a building with concrete *** simulation of changes in net radiant flux and flux density shows that the greenhouse effect of a 5-story building with windows yields 15.5%less cooling effect than one with concrete walls,and a 30-story building with windows reduces the cooling effect by 23.0%.The simulation results confirmed that the difference in the equivalent absorption rate of the aggregation element is the“director”of

关键词： Aggregation element algorithm Greenhouse effect of buildings with windows Net radiation flux Direct solar radiation flux Architectural shadow

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3D visualization of hydraulic fractures using micro-seismic monitoring:Methodology and application

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Petroleum 2022年第1期8卷 92-101页

作者： Chenghua Ou Chenggang liang zhaoliang li li Luo Xiao Yang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Petroleum Engineering School Southwest Petroleum UniversityChengdu610500China Jiqing Operation Area of PetroChina Xinjiang Oilfield Branch Fukang831511China Exploration and Development Research Institute of PetroChina Qinghai Oilfield Branch Dunhuang736200China Southwest Branch of China Petroleum Group Logging Co. Ltd.Chongqing400021China Southwest Research Institute of Dongfang Geophysical Exploration Co. Ltd.Chengdu610051China

In this paper,a new 3D visualization technical method was developed for hydraulic fractures using micro-seismic *** technical method consists of four steps:*** the geologic hydraulic fracture model based on seismic source location data from micro-seismic monitoring;*** a hydraulic fracture indication model,relying on the 3D spatial freeze-frame of micro-seismic monitoring sources from hydraulic fracturing;*** a hydraulic fracture density model using the intensity from the micro-seismic monitoring;and *** a 3D visualization of the hydraulic fractures,relying on the spatial constraints of the density model,the hydraulic fracture indication model,and the properties of the hydraulic *** proposed technical method was used to produce 3D visualizations of the hydraulic fractures in well X in the Jiao reservoir,China,and the 3D visualizations of the distribution,development,extent and cutting relationships of hydraulic fractures were successfully *** results show that this technical method can be used as a practical and reliable approach to characterize hydraulic fractures.

关键词： 3D visualization Micro-seismic monitoring Hydraulic fracture Jiao reservoir Reservoir modelling

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On the applicability of Kirchoff's law and the principle of heat balance in thermal infrared remote sensing:A non-isothermal system

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Science China Earth Sciences 2005年第1期48卷 53-64页

作者： ZHANG Renhua li zhaoliang SUN Xiaomin ZHU Zhilin WANG Weimin Institute of Geographical Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China

This paper proposes a basic equation of thermal radiation interaction between surface objects on the basis of the principle of heat balance in the interface. The solution of this equation takes account of the contribution of sensible heat flux and latent heat flux more completely, compared with traditional solution for surface cooling and heating processes. By the aid of the experimental data conducted in the Xiaotangshan experimental site, Beijing, both the non-applicability of Kirchoff's law and the measurability of surface emissivity in a non-isothermal system have been highlighted. Two methods called ventilation and time-delay compensations have been proposed to reduce the error induced by change of surface temperatures of non-isothermal objects during the measurement of emissivity. Based on the solution of the basic equation, this paper has analyzed and pointed out the misunderstanding in comprehension and application of Kirchoff's law published in literature.

关键词： applicability of Kirchoff's law, heat balance, non-isothermal system.

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3-D Geological Modeling-Concept,Methods and Key Techniques

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 1031-1036页

作者： PAN Mao li zhaoliang GAO Zhongbo YANG Yang WU Gengyu College of Earth and Space Sciences Peking University

3-D geological modeling plays an increasingly important role in Petroleum Geology, Mining Geology and Engineering Geology. The complexity of geological conditions requires different modeling methods in different situations. This paper summarizes the general concept of geological modeling; compares the characteristics of borehole-based modeling, cross-section based modeling and multi- source interactive modeling; analyses key techniques in 3-D geological modeling; and highlights the main difficulties and directions of future studies.

关键词： 3-D geological modeling geological interpretation methods of modeling quality of models

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