多智能体的城市精细尺度人口估算模型     

董春  尹诗画  张玉 《测绘科学》2019,44(8):113-119

针对传统人口空间化模型普适性较差,且数据处理较依赖人工操作等缺陷,该文提出了一种基于多智能体模型从微观个体的居住选择入手,在以往学者研究的基础上同时考虑居民居住建筑的内、外部环境因素模拟人口居住空间分布。创新性地以人口智能体为中心,结合GIS利用地理国情数据、POI兴趣点数据、夜间灯光数据、遥感影像数据来模拟居住环境,将心理学和经济学观点引入到智能体对居住地选择的决策行为中,结果表明,基于建筑物内、外部环境的多智能体人口空间分布模型,可以获取高空间分辨率的人口分布情况,且更接近于实际人口分布。  相似文献   

CO2 flux of soil respiration in natural recovering karst abandoned farmland in Southwest China     

Wang  Yanwei  Luo  Weijun  Zeng  Guangneng  Yang  Hanling  Wang  Meifang  Lyu  Yina  Cheng  Anyun  Zhang  Lin  Cai  Xianli  Chen  Jia  Wang  Shijie 《中国地球化学学报》2020,39(4):527-538

Acta Geochimica - To estimate carbon sequestration potential in the karst area, soil respiration in a natural recovering karst abandoned farmland in Shawan, Puding, Guizhou, southwest China was...  相似文献   

基于大数据分析的地热勘探潜力区预测方法的新进展     

蒋恕  王帅  祁士华  程万强  旷健  黄学莲  田峰  肖志才 《高校地质学报》2020,26(1):111-120

地质、地球物理、地球化学等数据信息资料是预测地热系统的关键。热源、流体或热量的运移途径、地热储层、盖层和保温条件对一个有效的地热系统的形成和保存至关重要。同时,地热勘探应考虑地形、地震活动、野生动物保护、环境敏感区和基础设施等因素。全球地热数据库调研分析表明:目前只有以美国为代表的少数国家整合了不同的地热数据库中历史积累的数据,能够初步用于地热勘探潜力区预测。大多数其他国家和地区的地热数据库数据缺乏统一的数据组织方式,查询和分析功能不完善,无法进行深层次的数据挖潜及有效使用。地理信息系统工具和数学方法的引入,有可能是解决这一问题的途径,可以整合不同属性的数据,运用模糊逻辑方法或机器学习方法方法,叠加潜力区带分析思想,从而预测隐藏式地热系统。  相似文献   

The impact of natural vegetation restoration on surface soil moisture of secondary forests and shrubs in the karst region of southwest China     

Jia Chen  Lin Zhang  Xianli Cai  Weijun Luo  Yina Lyu  Anyun Cheng  Shijie Wang 《水文研究》2024,38(5):e15161

Soil moisture is crucial to vegetation restoration in karst areas, and climate factors and vegetation restoration are key factors affecting changes in soil moisture. However, there is still much controversy over the long-term changes in soil moisture during vegetation restoration. In order to reveal the changes in soil moisture during vegetation restoration, we conducted long-term positioning monitoring of soil moisture at 0–10 and 10–20 cm on secondary forests sample plot (SF, tree land) and shrubs sample plot (SH, shrub land) in karst areas from 2013 to 2020. The results showed that the aboveground biomass of SF and SH increased by 50% and 240%, respectively, and the soil moisture of the SF and SH showed an increasing trend. When shrubs are restored to trees in karst areas, the soil moisture becomes more stable. However, the correlation coefficients (R²) between the annual rainfall and the annual average soil moisture of SF and SH are 0.84 and 0.55, respectively, indicating that soil moistures in tree land are more affected by rainfall. The soil moisture of shrubs and trees are relatively low during the months of alternating rainy and dry seasons. Rainfall has a very significant impact on the soil moisture of tree land, while air temperature and wind speed have a significant impact on the soil moisture of tree land, but the soil moistures of shrub land are very significantly affected by rainfall and relative humidity. Therefore, during the process of vegetation restoration from shrubs to trees, the main meteorological factors that affect soil moisture changes will change. The results are important for understanding the hydrological processes in the ecological restoration process of different vegetation types in karst areas.  相似文献   

2018年威宁县茶山区域自动站雨量空间一致性检查分析          下载免费PDF全文

余吕  吕静  蔡军  陈银东  张艳 《中低纬山地气象》2020,44(4):69-71

该文对2018年威宁县区域自动站雨量空间一致性进行分析,通过全年降水时空分布规律分析得出降水时空分布合理,通过分析发现茶山区域自动站全年雨量数据明显偏低,总结了区域自动站雨量数据异常的4种原因,进而对区域自动站的日常维护及汛前专项检查提供一些建议。  相似文献   

Autumn daily characteristics of land surface heat and water exchange over the Loess Plateau mesa in China   总被引：8，自引：0，他引：8  

文军  韦志刚  吕世华  陈世强  奥银焕  梁玲 《大气科学进展》2007,24(2):301-310

The Loess Plateau, located in northern China, has a significant impact on the climate and ecosystem evolvement over the East Asian continent. In this paper, the preliminary autumn daily characteristics of land surface energy and water exchange over the Chinese Loess Plateau mesa region are evaluated by using data collected during the Loess Plateau land-atmosphere interaction pilot experiment （LOPEX04）, which was conducted from 25 August to 12 September 2004 near Pingliang city, Gansu Province of China. The experiment was carried out in a region with a typical landscape of the Chinese Loess Plateau, known as ＂loess mesa＂. The experiment＇s field land utilizations were cornfield and fallow farmland, with the fallow field later used for rotating winter wheat. The autumn daily characteristics of heat and water exchange evidently differed between the mesa cornfield and fallow, and the imbalance term of the surface energy was large. This is discussed in terms of sampling errors in the flux observations-footprint; energy storage terms of soil and vegetation layers; contribution from air advections; and low and high frequency loss of turbulent fluxes and instruments bias. Comparison of energy components between the mesa cornfield and the lowland cornfield did not reveal any obvious difference. Inadequacies of the field observation equipment and experimental design emerged during the study, and some new research topics have emerged from this pilot experiment for future investigation.  相似文献   

广东惠州燕山期以来地质构造演化:对华南构造的新启示          下载免费PDF全文

张敏  旷健  肖志才  王帅  祁士华  陈孝雄  李立峰  唐灵 《地球科学》2021,46(1):242-258

为揭示广东惠州燕山期以来的地质构造演化,以惠州石坝-黄沙洞地区为例,并综合基础地质调查、大地电磁学、岩石地球化学、年代学等方法来分析研究.大地电磁结果显示研究区深部存在连为一体厚超5 km的燕山期花岗岩体岩床,并被新生代断裂切割;丹霞组底砾岩矿物磨圆较差显示出近源沉积特征;谐和年龄及年龄谱图揭示底砾岩年龄约160 Ma...  相似文献   

西南黄海2018年夏季溶解氧分布特征及其影响因素的初步分析     

严律  朱首贤 《海洋通报》2021,40(2):133-141

利用2018年夏季在西南黄海的现场调查资料,分析了海温、盐度和溶解氧(dissoloved oxygen,DO)分布特征.海区西侧的江苏沿海有明显的冷水带,冷水带对应表层较高的DO浓度.在海区南侧的长江口附近,盐度由南向北升高,上部海水DO浓度高,下部海水DO浓度低.综合现场观测数据、CCMP (Cross Calib...  相似文献   

Lipid residue analysis of ceramic vessels from the Liujiawa site of the Rui State (early Iron Age,north China)     

Bin Han  Zhanwei Sun  Jianrong Chong  Nanning Lyu  Huiyun Rao  Yimin Yang 《第四纪科学杂志》2022,37(1):114-122

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