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New Developments and Perspectives in Physical Geography in China

Chinese Geographical Science 2019年第3期29卷 363-371页

作者： FU Bojie TIAN Tao liu yanxu ZHAO Wenwu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical Science Beijing Normal University

Physical geography is the cornerstone of geography. In this article, the starting points of disciplines in physical geography in recent years in China are discussed. With the coupling of systems set as the research object, and sustainable development as the ultimate goal, the upgrade of physical geography can be deconstructed into three steps: deepen physical geography from the perspective of pattern-process coupling, improve the focus of physical geography from ecosystem processes to ecosystem services, and increase the understanding of the physical geography ‘pattern, process, service, sustainability' research cascade. The incorporation of human activities into physical geographic processes is essential to conduct integrated analysis on physical and human factors at different scales. The development of ecosystem service models that couple supply-demand and sustainable development are of great importance to bridge the role of ecosystem services between the natural environment and human well-being. Moreover, human-land systems and sustainable development have become the core areas and frontiers of integrated physical geography and even geography in general. China faces the great strategic demand of constructing an ecological civilization in a new era, and the development of the disciplines of physical geography should give full access to the advantages of intersecting and comprehensive disciplines, focus on the human-land system patterns,processes, and services in key research areas, and provide disciplinary support for regional, national, and global sustainable development.

关键词： pattern-process coupling ecosystem services sustainability human-land system China’s national demands

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Hydrocarbon Exploration in the South Yellow Sea Based on Airborne Gravity,China

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Journal of Earth Science 2016年第4期27卷 686-698页

作者： Wenyong Li yanxu liu Bing Li Feng Luo China Aero Geophysical Survey&Remote Sensing Center for Land and Resources Beijing 100083China

Differences between the Cenozoic and pre-Cenozoic strata and structures in the middlesouth South Yellow Sea are analyzed using high-resolution airborne gravity data combined with data from offshore wells, seismic exploration and the regional geological background, using forward and inverse methods. We discuss why hydrocarbon exploration has so far failed in the South Yellow Sea, and put forward alternative future exploration plans. The results show that there are thick Cenozoic strata over Jurassic-Cretaceous continental strata in the southern basin of the South Yellow Sea, contrasted with thick Mid-Paleozoic marine strata preserved in the middle uplift area. In the mid-southern South Yellow Sea, airborne Bouguer gravity anomalies are fragmentized with scattered local anomalies. Many tensile normal faults and minor fault blocks occur in the Cenozoic strata. In contrast, reverse faults and nappe structures are found in pre-Cenozoic strata. The essential reasons for the lack of a breakthrough in hydrocarbon exploration are the complexity of geological structures, hydrocarbon accumulation environments, seismic-geologic conditions, and the difficulty of interpreting and understanding these features, rather than an imbalance of exploration framework. Hydrocarbon exploration should be targeted at Mid-Cenozoic continental strata, especially of Paleogene age, in the middle to southern parts of the South Yellow Sea. Special attention should be paid to the favorable structural belts SYI1, SYI2, SYI3 and SYI4 in the southern basin of the South Yellow Sea, where detailed seismic exploration or drilling should be carried out. Attention should also be given to Mid-Paleozoic marine strata in the middle uplift area of the South Yellow Sea. Key strategies that could lead to a hydrocarbon exploration breakthrough are improving exploration resolution, conducting detailed studies of fine structures, and accurately locating minor structures.

关键词： airborne gravity strata and structures hydrocarbon exploration Paleogene SouthYellow Sea.

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基于航空重磁资料对大杨树盆地南部及周边岩浆岩分布规律的认识

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地球学报 2024年第2期45卷 189-202页

作者：曹安琪刘燕戌赖燕玲孟维棣高姗王宁蔡锦蒋哲欣中国自然资源航空物探遥感中心北京100083 河北省地质环境监测院河北石家庄050021 吉林建筑大学吉林长春130119 吉林大学地球探测科学与技术学院吉林长春130026

基于区域地质-地球物理综合研究,利用最新实测的航空重磁综合测量数据,结合野外踏勘与物性测量结果,采用化极、向上延拓、垂向导数等场源分离或异常提取技术,研究了大杨树盆地南部及周边不同类型岩浆岩的重磁异常响应,圈定了其空间分布... 详细信息

基于区域地质-地球物理综合研究,利用最新实测的航空重磁综合测量数据,结合野外踏勘与物性测量结果,采用化极、向上延拓、垂向导数等场源分离或异常提取技术,研究了大杨树盆地南部及周边不同类型岩浆岩的重磁异常响应,圈定了其空间分布范围,揭示了区域岩浆岩发育特征、分布规律及其控制因素。研究表明,研究区不同类型的岩浆岩具有迥然不同的航磁异常特征;本次采用的突出局部重磁异常的地球物理方法可以有效识别酸性、中酸性、中基性等岩浆岩;本次系统圈定了具有地质意义的岩浆岩百余处,多数岩浆岩沿北东向与北西向断裂及其两侧分布,尤以断裂交汇部位最为发育,说明断裂对岩浆活动具有明显的控制作用;航空重磁揭示研究区发育较大规模的隐伏中基性火山岩,为区域基础地质研究和火山岩盆地油气藏资源评价提供了重要的地质-地球物理依据。

关键词：航空重磁异常火山岩侵入岩分布规律大杨树盆地南部

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Study of Residual Basin and Tectonolayering Based on Airborne Gravity and Magnetic Data

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 1137-1153页

作者： LI Wenyong ZHOU Jianxin XIONG Shengqing liu yanxu XU Jianchun China Aero Geophysical Survey and Remote Sensing Center for Land and Resources

This paper takes the South Yellow Sea as an example to show a new method for comprehensive geological-geophysical research such as residual basin and tectonolayering using airborne gravity and magnetic data in China. Based on airborne gravity and magnetic data, by measuring and analyzing stratigraphic density and susceptibility, the depths to the pre-Sinian magnetic basement top, the pre-Jurassic top and the Cenozoic bottom, are obtained by forward and inverse methods constrained by seismic and drilling data; and furthermore, the residual thicknesses of the Sinian-Triassic, the Jurassic-Cretaceous and the Cenozoic are calculated. Based on airborne gravity and magnetic anomalies, the faults in the pre-Sinian magnetic basement, the Jurassic-Cretaceous and the Cenozoic are respectively interpreted by the qualitative and quantitative methods. On the basis of the above study, and combining regional important tectonic events, four tectonolayers are divided in the vertical succession in South Yellow Sea, namely the pre-Sinian magnetic basement, the Sinian-Triassic, the Jurassic-Cretaceous and the Cenozoic. The result shows that there are thick Cenozoic and Jurassic-Cretaceous strata and thin residual Sinian-Triassic strata in the Suzhong-Huangnan depression area, but there are thin or only sporadic Mesozoic-Cenozoic terrestrial strata and thick Sinian-Triassic marine strata reserved in Subei-Huangzhong uplift area and Sunan-Wunansha uplift area. The four tectonolayers are very different in structures as well as distributions in plane.

关键词： airborne gravity and magnetics comprehensive interpretation residual basin,tectonolayering South Yellow Sea

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SLC7A11的调控机制及其在心血管疾病中的作用

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生命的化学 2024年第1期44卷 73-82页

作者：罗豪刘延旭文聪岳荣川川北医学院附属医院心血管内科南充637000

溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11/xCT)作为一种胱氨酸/谷氨酸逆向转运蛋白,参与氨基酸在质膜上的转运,调节细胞铁死亡的发生机制。近年来,越来越多的研究表明,SLC7A11与心血管系统疾病的发生、发展密切... 详细信息

溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11/xCT)作为一种胱氨酸/谷氨酸逆向转运蛋白,参与氨基酸在质膜上的转运,调节细胞铁死亡的发生机制。近年来,越来越多的研究表明,SLC7A11与心血管系统疾病的发生、发展密切相关。本文综述了SLC7A11的结构、功能、调控机制及其在心血管疾病发展中的作用机理,旨在寻找与心血管疾病防治相关的潜在靶点。

关键词：溶质载体家族7成员11 心血管疾病双硫死亡铁死亡表观遗传调控

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Superimposed versus residual basin:The North Yellow Sea Basin

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Geoscience Frontiers 2012年第1期3卷 33-39页

作者： Wenyong Li Wenfen Lu yanxu liu Jianchun Xu China Aero Geophysical Survey and Remote Sensing Center for Land and Resources Beijing 100083China

The North Yellow Sea Basin is a Mesozoic and Cenozoic basin. Based on basin-margin facies, sedimentary thinning, size and shape of the basin and vitrinite reflectance, North Yellow Sea Basin is not a residual basin. Analysis of the development of the basin＇s three structural layers, self-contained petroleum systems, boundary fault activity, migration of the Mesozoic--Cenozoic sedimentation centers, different basin structures formed during different periods, and superposition of a two-stage extended basin and one-stage depression basin, the North Yellow Sea Basin is recognized as a superimposed basin.

关键词： Superimposed basin Residual basin Identification method Basinal structures Basin superposition North Yellow Sea Basin

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Study on the Flow of Rural Labor Force and the Contribution of Terrain Factor in Shaanxi,China

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Chinese Journal of Population,Resources and Environment 2012年第4期10卷 77-83页

作者： liu yanxu Li Chunyue Ren Zhiyuan College of Tourism and Environment Sciences Shaanxi Normal University Northwest Land and Resources Research Center Shaanxi Normal University

The flow of rural labor to urban is a significant phenomenon in China during the last 20 *** spite of many researches focus on the driving force of economy,terrain is an important index in the rural *** is a question that whether the flow of rural labor has some relationships with *** study used the relief degree of land surface (RDLS) as terrain index,and the cost distance model and the center of gravity model to analyze the relationship between terrain and labor *** results indicated:(1) In the last 20 years,the rural labor force was not simply flowing to the low terrain region in Shaanxi *** the RDLS was constantly strengthening the influence on the movement.(2) The RDLS was low in Guanzhong region,and the translation of rural labors relatively was not *** North Shaanxi act as the energy industry base,the number of rural labors there increased faster than in South Shaanxi.(3) The movements of economical centers took an important role in the change of rural labor centers,and terrain factors also showed a high correlation with *** is found that the lower of the terrain index,the higher of the land intensive degree,the more intensive of nonagriculturalization process.

关键词： rural labor force relief degree of land surface center of gravity spatio-temporal pattems

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Using Impervious Surfaces to Detect Urban Expansion in Beijing of China in 2000s

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Chinese Geographical Science 2016年第2期26卷 229-243页

作者： PENG Jian liu yanxu SHEN Hong XIE Pan HU Xiaoxu WANG Yanglin Laboratory for Earth Surface Processes Ministry of Education College of Urban and Environmental Sciences Peking University

The change of impervious surface area(ISA) can effectively reveal the gradual process of urbanization and act as a key index for monitoring urban expansion. Experiencing rapid growth of the built environment in the 2000 s, urban expansion of Beijing has not been fully characterized through ISA. In this study, Landsat TM images of Beijing in 2001 and 2009 were obtained, and the eight-year urban expansion process in Beijing was analyzed using the ISA extracted by means of the vegetation-imperious surface-soil(V-I-S) model. From the spatial variation in ISA, the ring structure of urban expansion in Beijing was significant during the study period, with decreasing urban density from the city center to the periphery. In the ring road analysis, the most dramatic changes of ISA were found between the fifth ring and the sixth ring. This area has experienced the most new residential development, and is currently the main source of urban expansion. The typical profile lines revealed the directional characteristics of urban expansion. The east-west profile was the most urbanized axes in Beijing, while ISA change in the east-north profile was more significant than in the other five profiles. Moreover, the transition matrix of ISA levels revealed an increase in urban density in the low density built areas; the Moran′s I index showed a clear expansion of the central urban area, which spread contiguously; and the standard deviational ellipse indicated the northeast was the dominant direction of urban expansion. These findings can provide important spatial control guidelines in the next round of national economic and social development planning, overall urban and rural planning, and land use planning.

关键词： impervious surface area(ISA) vegetation-imperious surface-soil(V-I-S) model profile line analysis urban expansion direction Beijing China

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基于ADASYN和随机森林的UWB非视距识别方法

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德州学院学报 2024年第4期40卷 28-32页

作者：胡方勇孙春银夏金凤刘延旭吉林化工学院信息与控制工程学院吉林吉林132022 德州学院计算机与信息学院山东德州253023

室内UWB(超宽带)定位系统中视距、非视距信号不平衡是常见现象,过分依赖平衡数据集进行NLOS(非视距传播)识别面临着数据采集工作量增加和识别性能降低问题。为解决这一挑战,提出ADASYN和随机森林结合的非视距识别方法。应用ADASYN算法... 详细信息

室内UWB(超宽带)定位系统中视距、非视距信号不平衡是常见现象,过分依赖平衡数据集进行NLOS(非视距传播)识别面临着数据采集工作量增加和识别性能降低问题。为解决这一挑战,提出ADASYN和随机森林结合的非视距识别方法。应用ADASYN算法将减少视距、非视距信号数据量之间的差距,可实现样本数量平衡;结合随机搜索与五折交叉验证,实现随机森林模型超参数的自动优化以提升模型的整体效率。将所提出的方法与其他常见的机器学习方法进行比较,实验结果表明,所提出方法在具有最优识别性能的同时有效地缩减了调参时间。

关键词：非视距识别数据不平衡随机森林机器学习

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热处理制度对GH4698高温合金组织与硬度的影响

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金属热处理 2024年第5期49卷 204-210页

作者：张瑞张晓辰张正崔文明杨家典刘彦旭王纪兴白家元北京有色金属研究总院北京100088 国合通用测试评价认证股份公司北京100088 国合通用(青岛)测试评价有限公司山东青岛266042 贵州航宇科技发展股份有限公司贵州贵阳550000

研究了GH4698高温合金在不同热处理制度下显微组织以及硬度的变化规律。结果表明,对于GH4698高温合金标准热处理制度,一次固溶冷却速度对γ'析出相的尺寸、含量、间距以及合金硬度的影响较小。在一次时效阶段,冷速越大,γ'相尺寸越小,... 详细信息

研究了GH4698高温合金在不同热处理制度下显微组织以及硬度的变化规律。结果表明,对于GH4698高温合金标准热处理制度,一次固溶冷却速度对γ'析出相的尺寸、含量、间距以及合金硬度的影响较小。在一次时效阶段,冷速越大,γ'相尺寸越小,硬度越高。一次时效温度在1000℃附近时,80~260 nm的γ'相能够有效析出,更有利于后续二次时效。在二次时效阶段,725~775℃温度范围,能够充分析出80 nm以下的小尺寸γ'相,然而在725℃以下及775℃以上温度范围,无法有效析出80 nm以下的小尺寸γ'相。

关键词： GH4698高温合金热处理时效温度力学性能

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