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Science china(Technological Sciences) 2009年第4期52卷 820-834页

作者： guan zhicheng {2. resources and Hydropower planning & design general institute, beijing10012., china 1. water resources and Hydropower {2. & design general institute Beijing 100120 China

On May 12. 2.08, a major earthquake measured 8 on the Richter scale jolted Wenchuan County in Si- chuan Province, china with the epicentral intensity of XI degrees. Zipingpu Dam is located 17.17 km from the epicenter and the influence intensity at the damsite reached IX―X degrees. It is the first time in the world for such a high concrete-faced rockfill dam (CFRD) in china to experience such a strong earthquake occurring in such a short distance. Due to its location of special importance to the down- stream areas, the safety state and damaging condition of the Zipingpu Dam has attracted great atten- tions from various circles. Based on site investigation of the damages to the Zipingpu Dam and com- parison analysis of the observation data obtained before and after the earthquake, the paper makes a comprehensive assessment of the key technical issues relevant to this high CFRD, including its safety state and the high slope stability after the earthquake.

关键词： earthquake earthquake damage investigation concrete-faced rockfill dam dam project safety state Zipingpu Dam

Improving access to urban parks through public transit optimization

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Frontiers of Architectural Research 2024年第3期13卷 575-592页

作者： Ning Xu Kaidan guan Pu Wang School of Architecture Southeast UniversityNanjing 210096China Jiangsu Provincial Urban and Rural Digital Technology Engineering Center Nanjing 210096China

This study establishes an evaluation and optimization framework for the public transit network based on social network analysis and a greedy algorithm,aiming to explore a quantitative approach to improving access to urban parks through public transit *** network analysis and the ArcGIS platform are used to build a public transit network model within Nanjing Old City and analyze its overall network structure *** study also focuses on a method to improve the convenience of reaching regional and citylevel parks by public transit by increasing access and connecting points accordingly.A greedy algorithm is introduced to generate an optimized solution for improving public transit accessibility to regional and city-level parks,consequently enhancing their *** major findings include:(1)The greedy algorithm effectively enhances the performance of the public transit network,but its benefits gradually diminish as more stations are added.(2.Strategically adding stations enhances the performance of most public transit access points,creating efficient pathways for other stations to directly reach these access points and enter regional and city-level parks.(3)The optimized public transit network model offers guidance for the planning and layout of regional and city-level *** site selection for new parks should prioritize establishing connections with the“hubs”in the public transit *** proposed optimization of the public transit network in this study is specific to a single type of urban park,but subsequent research could be conducted to extend the optimization of public transit accessibility around more urban public resources.

关键词： Urban parks Social network analysis Accessibility optimization Public transit network Greedy algorithm

AstroPose:Astronaut pose estimation using a monocular camera during extravehicular activities

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Science china(Technological Sciences) 2024年第6期67卷 1933-1945页

作者： LIU ZiBin LI You WANG ChunHui LIU Liang guan BangLei SHANG Yang YU QiFeng College of Aerospace Science and Engineering National University of Defense TechnologyChangsha410073China Key Laboratory of Human Factors Engineering China Astronaut Research and Training CenterBeijing100094China

With the completion of the Chinese space station,an increasing number of extravehicular activities will be executed by astronauts,which is regarded as one of the most dangerous activities in human space *** guarantee the safety of astronauts and the successful accomplishment of missions,it is vital to determine the pose of astronauts during extravehicular *** article presents a monocular vision-based pose estimation method of astronauts during extravehicular activities,making full use of the available observation ***,the camera is calibrated using objects of known structures,such as the spacesuit backpack or the circular handrail outside the space ***,the pose estimation is performed utilizing the feature points on the *** proposed methods are validated both on synthetic and semi-physical simulation experiments,demonstrating the high precision of the camera calibration and pose *** further evaluate the performance of the methods in real-world scenarios,we utilize image sequences of Shenzhou-13 astronauts during extravehicular *** experiments validate that camera calibration and pose estimation can be accomplished solely with the existing observation resources,without requiring additional complicated *** motion parameters of astronauts lay the technological foundation for subsequent applications such as mechanical analysis,task planning,and ground training of astronauts.

关键词： monocular camera astronaut pose estimation camera calibration

Accurate Shortwave Radiation Simulation with a Two-Layer Aerosol Model in Xinjiang Region

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Journal of Meteorological Research 2024年第1期38卷 69-87页

作者： guan HUANG Yonghang CHEN Qiong LIU Pengtao WANG Qianshan HE Qing HE Shuai LI Weiling SHAO Ting FAN School of Tourism&Research institute of Human Geography Xi’an International Studies UniversityXi’an 710128 Center for Silk Road and Eurasian Civilization Studies Xi’an International Studies UniversityXi’an 710128 College of Environmental Science and Engineering Donghua UniversityShanghai 201620 Shanghai Meteorological Service Shanghai 200030 Shanghai Key Laboratory of Meteorology and Health Shanghai 200030 Taklimakan Desert Meteorology Field Experiment Station of china Meteorological Administration Institute of Desert MeteorologyUrumqi 830002 Xinjiang Climate Centre Xinjiang Meteorological ServiceUrumqi 830002

To harness the rich solar energy resources in Xinjiang Region of Northwest china,this study tries to address the issue of lack of downward surface shortwave radiation(DSSR)observations and the need to improve the accuracy of satellite retrieval and numerical simulation of DSSR under varied sky and meteorological conditions.(1)A two-layer aerosol model specific to Xinjiang was developed to capture the vertical distributions of aerosols based on multiple data sources including lidar,GPS sounding,ground meteorological observations,and profiles from the ECMWF reanalysis version 5(ERA5)*** results show that the ERA5/PBLH(planetary boundary layer height)and ERA5/ALH(aerosol layer height)could be used to establish the two-layer aerosol model and characterize the vertical distribution of aerosols in Xinjiang Region.(2.Using the Santa Barbara Discrete Atmospheric Radiative Transfer(SBDART)model,a localized inverse model of clear-sky DSSR was *** parameter adjustment and using the optimal combination of input parameters for DSSR simulation together with the two-layer aerosol model,the model-simulated DSSR(DSSRSBD)under clear-sky conditions improved significantly compared to the initial results,with all fitting indices greatly improved.(3)In addition,the study demonstrated that the impact of the two-layer aerosol model on DSSR was more pronounced under dust conditions than clear-sky conditions.(4)Using the localized clear-sky DSSR inversion model and its required parameters,simulations were also conducted to capture the spatiotemporal distribution of DSSR under clear-sky conditions in Xinjiang from 2.17 to *** annual average DSSR_(SBD)under clear-sky conditions in Xinjiang during 2.17–2.19 was 606.78 W m^(-2.,while DSSR from CERES(DSSR_(CER))under the same conditions was {2.ly higher(703.95 W m^(-2.).(5)It is found that satellite remote sensing products experienced data loss in high-altitude snow areas,where numerical simulation technology could ser

关键词： downward surface shortwave radiation(DSSR) aerosol vertical distribution Clouds and the Earth’s Radiant Energy System(CERES) Santa Barbara Discrete Atmospheric Radiative Transfer(SBDART) Xinjiang

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《管子·问》的国家安全与情报学思想研究

情报杂志 2024年第9期43卷 70-76页

作者：熊剑平房志成国防科技大学外国语学院南京210039

[研究目的]《管子·问》是一篇古代有关国家安全情报工作和调查研究的奇文,其中试图展开的调查大多是立足于国家安全而展开,堪称有关国家安全情报学的专论,对其进行解读有助于提升历史认知和现实思考。[研究方法]对《管子·问》的主体... 详细信息

[研究目的]《管子·问》是一篇古代有关国家安全情报工作和调查研究的奇文,其中试图展开的调查大多是立足于国家安全而展开,堪称有关国家安全情报学的专论,对其进行解读有助于提升历史认知和现实思考。[研究方法]对《管子·问》的主体内容进行条分缕析,从立足于准备军事斗争追求霸王之业,侧重于国内形势关注战时经济和人员储备情况,着眼于提高反情报意识防范外敌渗透三个方面,剖析解读其中包含的国家安全情报学思想,同时结合“大争之世”的时代背景,提出关于国家安全情报工作的调查方法和历史断想,指出其对于构建国家安全学科的重要意义。[研究结论]《管子·问》重视对影响国家安全的各方面内容进行认真细致的调查,也由此建立了国家安全情报学的古代工作范式,对于国家安全情报学的构建及情报史研究而言,都具有特殊价值。其中对国家安全学科建设与情报学建设始终存在着密不可分的关系的论述,突出强调了扎实有效的情报工作的重要性,对于今天的有关工作也具有启示作用。

关键词：《管子·问》国家安全情报学情报工作情报史反情报

INTEGRATED FLOOD CONTROL WITH ECOLOGICAL ENVIRONMENT OF DANJIANGKOU RESERVOIR

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INTEGRATED FLOOD CONTROL WITH ECOLOGICAL ENVIRONMENT OF DANJ...

Development Plan of East Unity Oil Field, Sudan, Using Reservoir Simulation Study

水电2.06国际研讨会

作者： guan guangming Wu Zeyu Dai Changjun Xie Min Rao guanghui Changjiang institute of Survey planning design and Research Hubei Wuhan 430010 china

After the first stage of the middle-route of the South-to-North water transfer project is finished, the general efficiency of Danjiangkou Reservoir for flood control, water supply, power generation and shipping is further exploited, especially the flood control for downstream of Danjiangkou Reservoir is enhanced and 9.5 billion m3 water is transferred to the North of china. Nevertheless, future water demand for ecological environment in Hanjiang River Basin must be considered, and it may be contained within reservoir operating regulation;also, it has significant relations with sustainable development in Hanjiang River Basin and the success of the middle-route of the South-to-North water transfer project. For solving the problem, the flood control principle is put forward that water diversion is preferential to power generation, eco-environmental protection is preferential to water diversion and flood control is preferential to eco-environmental protection. Considering multifarious demands of water conservancy, the integrated flood control principle has been researched. The principles are as follows. （1） Flood control. The flood control principle is to decide the water discharging by predicting, compensation regulating, controlling discharge classification and prearranging flood control capacity for flood control object in downstream, which means discharging more at high water level of reservoir and fewer at low water level. Based on the safety of flood, flood resources utilization can be achieved. （2. water supply of the North water service area. water supply of the first stage of the middle-route of the South-to-North water transfer project is for the cities. For most transferable water quantity in dry year, reservoir operating graph is drawn. water resources of the North water service area is complemented and replaced for agriculture and ecological environment. （3） water supply of Hanjiang River Basin. The future demand water quantity in upstream reach of Danjiang

关键词： ecological environment the middle-route of the South-to-North water transfer project Danjiangkou Reservoir study on flood control operation

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Journal of china University of Geosciences 2002年第3期13卷 248-251页

作者： Musa Tagwa A Ibrahim Ahmed A guan Zhenliang Faculty of Earth resources,{2. University of Geosciences, Wuhan 430074 Faculty of Earth resources China University of Geosciences Wuhan 430074

Simulation study was applied in the development planning of East Unity oilfield, Sudan. A grid consisting of 2.000 cells was constructed. A major challenge of the study wasto evolve a full field development and future reservoir management strategy that would ensuremaximum recovery of oil based on well Un51. Simulation shows that Un51 as injection well inAradiebaC would yield better oil recovery than to be production well.

关键词： reservoir simulation east unity oil field water injection productionprofile

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大中型水库建设洲滩土地淹没处理补偿探讨

中国农村水利水电 2024年第6期 180-184,192页

作者：官耀辉湖南省水利水电勘测设计规划研究总院有限公司湖南长沙410007

大中型水库淹没处理是工程建设的重要基础,涉及到国家、集体和个人的利益,具有政策性强、现场情况复杂、利害关系交织等特点,其中洲滩土地权属确定、地类认定和补偿费用计算争议较大,从湘资沅澧四水大中型水库工程建设淹没处理的实践,... 详细信息

大中型水库淹没处理是工程建设的重要基础,涉及到国家、集体和个人的利益,具有政策性强、现场情况复杂、利害关系交织等特点,其中洲滩土地权属确定、地类认定和补偿费用计算争议较大,从湘资沅澧四水大中型水库工程建设淹没处理的实践,提出了洲滩土地权属确定、地类认定的有关法规政策依据,以及洲滩土地补偿费和相关税费计算的路径和方法,供水利水电工程征地补偿和移民安置工作者参考。

关键词：洲滩土地权属地类法规政策淹没处理

煤炭资源型县域土地城镇化时空演变及驱动因素——以淮北市濉溪县为例

同方期刊数据库博看期刊评论

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资源科学 2024年第3期46卷 583-596页

作者：陈清荷焦华富管晶安徽师范大学地理与旅游学院芜湖241002 扬州大学商学院扬州225127

【目的】揭示煤炭资源型县域土地城镇化的过程和特征,以期为其国土空间规划和土地集约利用提供科学依据。【方法】以典型的煤炭资源型县域濉溪县为案例,基于遥感数据、社会经济发展数据,运用景观格局指数、扩张指数、缓冲区分析、双变... 详细信息

【目的】揭示煤炭资源型县域土地城镇化的过程和特征,以期为其国土空间规划和土地集约利用提供科学依据。【方法】以典型的煤炭资源型县域濉溪县为案例,基于遥感数据、社会经济发展数据,运用景观格局指数、扩张指数、缓冲区分析、双变量分析等方法,对该县1950-2.2.年土地城镇化的时空演变特征进行归纳,进而分析其驱动因素。【结果】(1)煤炭资源型县域土地城镇化分为“缘煤建镇”“矿镇共建”“产城融合”3个阶段,且土地城镇化与煤炭资源形成了“依赖、制约、跳脱”的关系;(2.1950-1998年为“缘煤建镇”至“矿镇共建”阶段,城镇建设用地依矿井分布,并在原有分布基础上进行延伸,城镇建设用地增长由低速不均衡转向中速不均衡,县域功能区以工业区、居住区、商业区为主。1998-2.2.年为“产城融合”阶段,城镇建设用地以外围扩张、建设新区为主,呈现高速集约化发展状态,县域功能区呈多元化发展;(3)煤炭资源型县域土地城镇化是由多种因素长期作用下形成的,且在不同发展阶段的主导因素不同。煤炭资源和区位条件是基础动力,经济发展和人口增长是直接动力,发展战略与政策制度具有短期稳定性和突变性的特点。【结论】在“缘煤建镇”与“矿镇共建”阶段,煤炭资源型县域土地城镇化发展得益于煤炭资源的开发利用,在“产城融合”阶段,土地城镇化发展受资源枯竭以及采煤塌陷区的牵制作用明显。因此,煤炭资源型县域土地城镇化要实现可持续发展必须以生态修复为首要任务,建立集约化土地利用机制。

关键词：土地城镇化煤炭资源型县域景观格局指数驱动因素濉溪县

黄淮海平原粮食生产空间格局演化及其影响因素

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中国农业资源与区划 2024年第8期45卷 31-43页

作者：关浩杰司喜梅河南工业大学粮食经济研究中心

[目的]精准把握黄淮海平原粮食生产空间格局演化特征及影响因素，优化黄淮海平原粮食生产格局。[方法]文章采用对数平均迪氏分解模型（LMDI模型）对2.0—2.2.年黄淮海平原所涉及的7个省（市）粮食产量变化的影响因素进行分解对比，分析... 详细信息

[目的]精准把握黄淮海平原粮食生产空间格局演化特征及影响因素，优化黄淮海平原粮食生产格局。[方法]文章采用对数平均迪氏分解模型（LMDI模型）对2.0—2.2.年黄淮海平原所涉及的7个省（市）粮食产量变化的影响因素进行分解对比，分析粮食总产量、粮食单产累积效应、粮食种植结构对粮食增产的影响。[结果]（1）黄淮海地区粮食总产量整体呈上升趋势，粮食增产量空间格局由黄淮海西部地区转移到东部地区；（2.粮食增产因素主要是单产累积效应，2.04—2.16年黄淮海平原粮食产量稳步增长，粮食种植面积连续13年对粮食增产量产生正向影响，但影响效果呈减弱的趋势，2.17年开始对粮食增产量产生负向影响；（3）从种植结构看，玉米播种面积效应、小麦单产效应对粮食增产影响效果明显。江苏、安徽省的稻谷增产从依赖播种面积转向单产提高；河南、山东省小麦生产能力强，小麦单产提升效果显著；玉米种植面积调减影响整体玉米产量，河南、山东、河北省受影响较大，但河北省玉米单产提升效果显著；豆类增产省份从安徽转移到单产高的河南省、种植面积增多的山东省；山东、江苏、安徽薯类产量受单产效应负向影响。[结论]要完善粮食支持政策、提高育种水平、优化种植结构、做好防灾减灾，不断探讨新的粮食增产途径。

关键词：黄淮海平原粮食生产空间格局粮食增产对数平均迪氏分解模型(LMDI模型)

来源：博看期刊