面向工程地质领域的滑坡知识图谱构建方法研究     

许强  崔圣华  黄维  裴向军  范宣梅  艾瑛  赵伟华  罗永红  罗璟  刘明  夏敏  王飞  彭大雷  郑光  陈婉琳 《武汉大学学报(信息科学版)》2023,(10):1601-1615

大数据为滑坡研究带来了新机遇,但由于数据类型复杂、语义关系多样、共享机制不明等问题,对滑坡数据深层挖掘仍然有限,在滑坡研究中大数据优势较难发挥。提出一种面向工程地质领域的滑坡知识图谱构建方法,抽取、融合、结构化多源异构滑坡知识,实现对滑坡知识大数据的询查、关联和推理。采用自顶向下和自底向上结合方法,划分滑坡概念和本体,形成以滑坡野外调查、滑坡评价、滑坡类型、滑坡地貌特征、滑坡形态特征、滑坡致灾信息、滑坡活动状态、滑坡成因机制、滑坡稳定性分析方法、滑坡防治措施10大类知识为基础的滑坡知识体系,建立了包括概念层、属性层、关系层、规则层、实例层的知识图谱模式层;从广阔数据源抽取滑坡知识信息、建立语义网络,对冗余知识进行融合,构建了知识图谱数据层;利用Neo4j平台存储滑坡知识,实现了知识可视化与检索,为滑坡机理研究与防灾减灾提供新思路、新方法。所提的滑坡知识图谱构建方法可拓展到其他类型灾害知识图谱研究,并与其他学科领域产生联系,促进学科深度交叉与融合。  相似文献   

典型农业流域不同类型池塘水体CO₂排放特征     

陈嘉宁  肖启涛  刘臻婧  肖薇  谢晖  罗菊花  邱银国  胡正华  段洪涛 《湖泊科学》2024,36(1):88-98

内陆水体是大气CO₂收支估算的重要组成部分。农业流域分布着大量池塘景观水体,且具备蓄洪抗旱、消纳污染、水产养殖等多种功能。但是,农业流域不同功能的小型池塘CO₂排放特征尚不清楚。本研究以极具农业流域代表性的烔炀河流域为研究对象,选取流域中用于水产养殖(养殖塘)、生活污水承纳(村塘)、农业灌溉(农塘)、蓄水(水塘)的4个功能不同的景观池塘,基于为期1年的野外实地观测,以明确农业流域小型池塘CO₂排放特征。结果表明,不同功能池塘水体CO₂排放差异显著,受养殖活动、生活污水输入和农田灌溉等人类活动影响,养殖塘((80.37±100.39) mmol/(m²·d))、村塘((48.69±65.89) mmol/(m²·d))和农塘((13.50±15.81) mmol/(m²·d))是大气CO₂的热点排放源,其CO₂排放通量分别是自然蓄水塘((4.52±23.26) mmol/(m²·d))的18、11和3倍。统计分析也表明,该流域池塘CO₂排放变化总体上受溶解氧、营养盐等因素驱动。4个不同景观池塘CO₂排放通量全年均值为(37.31±67.47) mmol/(m²·d),是不容忽视的CO₂排放源,其中养殖塘和村塘具有较高的CO₂排放潜力,在未来研究中需要重点关注。  相似文献   

计算机内插在数字高程分析中的应用     

罗壮志 《测绘与空间地理信息》2010,33(3):223-226

对数字高程模型分析中常用的内插方法进行了介绍,对拉格朗日(Lagrange)内插法、不规则三角网(TIN)内插、标准格网内插法进行了算法研究并在工程应用中编写计算机程序,在深圳软地基处理的沉降监测工程中对监测样本点的沉降进行内插计算和分析。  相似文献   

数字郴州地理空间框架建设理论与实践     

罗建新  伍百发 《地理空间信息》2010,8(3):22-24

结合郴州地理空间框架建设情况简要介绍了数字郴州空间框架建设的背景、意义和目标,重点讲述了数字郴州空间框架建设的主要内容,给出了地理空间框架建设一般性问题的解决方法。  相似文献   

蒙西地1井发现下二叠统寿山沟组巨厚页岩气生烃层          下载免费PDF全文

施立志  张英利  张永生  苗忠英  赵撼霆  汪彪  娄鹏程  崔新宇 《中国地质》2020,47(5):1594-1595

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铀矿地质勘探设施退役后分类长期监护工作初探     

贝新宇 《铀矿地质》2020,(3):207-211

铀矿地质勘探设施退役治理完成后,即进入长期监护期。文章在分析我国铀矿地质勘探设施特点基础上,根据所处地理位置区域进行科学分类。结合不同地域铀矿地质勘探设施环境特异性,研究长期监护期关注的重点和制约条件,从工程稳定性、工程设施维护等方面提出监护工作要求,给出辐射环境监测建议,为进一步加强铀矿地质勘探设施退役治理效果、确保长期稳定提供技术支撑。  相似文献   

支流侵蚀对澜沧江上游亚贡倾倒体的影响          下载免费PDF全文

尚琪  涂国祥  罗新平 《中国地质灾害与防治学报》2020,31(4):39

澜沧江上游发育大型倾倒变形体,其强倾倒深度可达近200 m。在其形成过程中不仅向澜沧江一侧产生强烈倾倒,同时还向澜沧江支流-木水河侧产生了强烈倾倒变形破坏,并且木水河两岸岩体的倾倒变形程度有着显著差异。基于大量地表调查,结合平硐资料,对该倾倒变形体的发育特征进行了详细调查,重点对木水河的侵蚀作用对该倾倒变形体的影响展开了深入研究,得出以下结论:1.边坡内平移断层F_(105)使得该倾倒体岩层走向与坡面近于平行,这是导致边坡木水河侧岩层产生强烈倾倒的内在原因;2.木水河强烈侵蚀作用导致的岸坡岩体卸荷松弛是促使岩体向木水河侧产生强烈倾倒的外在动力;3.该倾倒变形的形成演化经历了两个阶段,分别是澜沧江侵蚀阶段和木水河侵蚀阶段,并造成亚贡倾倒体岩体分别向两个方向发生卸荷与倾倒破坏。  相似文献   

孟加拉湾南部冷池的极端事件及其机理初析          下载免费PDF全文

冯建杰  潘爱军  董昌明  林新宇  邱云 《应用海洋学学报》2024,43(1):012-019

本研究利用多源卫星遥感数据对比分析了2018年和2015年孟加拉湾南部冷池的极端异常事件。孟加拉湾南部冷池早期出现在5月,8月和 9月强度达到最大,10月开始减弱,随后逐渐消失。数据显示2018年和2015年冷池海表温度距平值分别为-0.55 ℃和0.43 ℃,是1993—2018年26 年中冷池降温最强和最弱的年份。2018年孟加拉湾南部冷池风应力距平值为0.02 N/m2,而2015年距平值为-0.01 N/m2。2018年Ekman抽吸速度距平在冷池区域为正,2015年为负。经混合层热收支计算得到,造成冷池产生的主要原因是平流效应,且2018年与2015年的夏季（6—8月）降温平流项分别占49.2%和80.7%。冷池极端事件主要发生在6月,2018年6月冷池降温是2015年的2.76倍,并且海表净热通量项和平流项的异常对冷池极端事件的产生起了重要作用。  相似文献   

Interannual variation of nutrients along a transect across the Kuroshio and shelf area in the East China Sea over 40 years     

胡莹英  郭新宇  赵亮 《中国海洋湖沼学报》2018,(1)

Long-term datasets of water temperature,salinity,dissolved oxygen,phosphate and nitrate from 1973 to 2013 were used to study interannual variations of these parameters along a transect(section PN)across the Kuroshio and shelf area in the East China Sea.Water temperature and salinity at depths of 0–200 m showed a low-high-low-high pattern over the 40-year period.Water temperature and salinity at 500 m were relatively high from 1985 to 1990 and decreased continuously thereafter.Salinity at 800 m was lowest around 1993 and increased thereafter.Nutrients were highest between 1980 and 1985.After 1985,nutrients at 500 m were increasing.The range of variation in nutrients was large before 1985 and the magnitude increased with greater depths.Apparent oxygen utilization at 500 m depth was decreasing before 1990 and started to increase after 1992.Significant changes after 1990 at 500 m depth may be due to the upward trend of the upper boundary of Kuroshio intermediate water.Interannual variation of water temperature,salinity,dissolved oxygen,phosphate and nitrate along section PN has a significant correlation with the Pacific Decadal Oscillation index.  相似文献   

Simulating the responses of a low-trophic ecosystem in the East China Sea to decadal changes in nutrient load from the Changjiang(Yangtze) River     

王玉成  郭新宇  赵亮 《中国海洋湖沼学报》2018,(1)

Using a three-dimensional coupled biophysical model,we simulated the responses of a lowtrophic ecosystem in the East China Sea(ECS)to long-term changes in nutrient load from the Changjiang(Yangtze)River over the period of 1960–2005.Two major factors aff ected changes in nutrient load:changes in river discharge and the concentration of nutrients in the river water.Increasing or decreasing Changjiang discharge induced different responses in the concentrations of nutrients,phytoplankton,and detritus in the ECS.Changes in dissolved inorganic nitrogen(DIN),silicate(SIL),phytoplankton,and detritus could be identified over a large area of the ECS shelf,but changes in dissolved inorganic phosphate(DIP)were limited to a small area close to the river mouth.The high DIN:DIP and SIL:DIP ratios in the river water were likely associated with the diff erent responses in DIN,DIP,and SIL.As DIP is a candidate limiting nutrient,perturbations in DIP resulting from changes in the Changjiang discharge are quickly consumed through primary production.It is interesting that an increase in the Changjiang discharge did not always lead to an increase in phytoplankton levels in the ECS.Phytoplankton decreases could be found in some areas close to the river mouth.A likely cause of the reduction in phytoplankton was a change in the hydrodynamic field associated with the river plume,although the present model is not suitable for examining the possibility in detail.Increases in DIN and DIP concentrations in the river water primarily led to increases in DIN,DIP,phytoplankton,and detritus levels in the ECS,whereas decreases in the SIL concentration in river water led to lower SIL concentrations in the ECS,indicating that SIL is not a limiting nutrient for photosynthesis,based on our model results from 1960 to 2005.In both of the above-mentioned cases,the sediment accumulation rate of detritus exhibited a large spatial variation near the river mouth,suggesting that core sample data should be carefully interpreted.  相似文献