水中目标信息智能识别方法研究          下载免费PDF全文

王冠  郭育 《数字海洋与水下攻防》2018,1(2):69-75

提出了基于判定准则的海洋环境下目标关系识别方法。通过HBACA算法查找或识别不同元素关系能力强的特性,提取目标信息数据的关系,之后在信息数据关系中计算每个信息节点的点度中心度、紧致中心度和节点活跃度,根据信息数据在目标事件中的重要或关键程度,将信息数据划分为关键目标信息、重要目标信息和一般目标信息。仿真结果显示:能够明确地获得关键的信息数据坐标,并与其所处事件的重要程度能够匹配,同时相关信息数据的关系非常明显,很容易提炼出所处目标事件中重要目标信息数据之间的关联。  相似文献   

中国南海北部珠江口-琼东南盆地钻井岩屑地球化学特征及深水区天然气聚集特征     

高岗  张功成  陈果  刚文哲  沈怀磊  赵科 《海洋学报(英文版)》2018,37(2):44-53

The Qiongdongnan Basin and Zhujiang River(Pearl River) Mouth Basin, important petroliferous basins in the northern South China Sea, contain abundant oil and gas resource. In this study, on basis of discussing impact of oil-base mud on TOC content and Rock-Eval parameters of cutting shale samples, the authors did comprehensive analysis of source rock quality, thermal evolution and control effect of source rock in gas accumulation of the Qiongdongnan and the Zhujiang River Mouth Basins. The contrast analysis of TOC contents and Rock-Eval parameters before and after extraction for cutting shale samples indicates that except for a weaker impact on Rock-Eval parameter S_2, oil-base mud has certain impact on Rock-Eval S_1, Tmax and TOC contents. When concerning oil-base mud influence on source rock geochemistry parameters, the shales in the Yacheng/Enping,Lingshui/Zhuhai and Sanya/Zhuhai Formations have mainly Type Ⅱ and Ⅲ organic matter with better gas potential and oil potential. The thermal evolution analysis suggests that the depth interval of the oil window is between 3 000 m and 5 000 m. Source rocks in the deepwater area have generated abundant gas mainly due to the late stage of the oil window and the high-supper mature stage. Gas reservoir formation condition analysis made clear that the source rock is the primary factor and fault is a necessary condition for gas accumulation. Spatial coupling of source, fault and reservoir is essential for gas accumulation and the inside of hydrocarbon-generating sag is future potential gas exploration area.  相似文献   

Succession of the Nanoplankton Community during a Brown Tide in a Scallop Culture Area in China     

Qiao  Ling  Yu  Jie  Li  Ying  Guo  Haobing  Zhen  Yu  Zhang  Lingling  Mi  Tiezhu  Zhang  Fuchong  Bao  Zhenmin 《Ocean Science Journal》2019,54(3):375-392

Ocean Science Journal - Brown tides caused by Aureococcus anophagefferens have occurred frequently in the coastal waters of Qinhuangdao since 2009. The Changli coast is the area most strongly...  相似文献   

Coastal ecosystem change in Asia: hypoxia,eutrophication, and nutrient conditions     

Guo  Xinyu  Morimoto  Akihiko  Zhou  Feng  Yoshie  Naoki  Damar  Ario  Takikawa  Tetsutaro 《Journal of Oceanography》2021,77(6):829-830

Journal of Oceanography -  相似文献   

长江经济带开发区空间分布与产业集聚特征研究   总被引：2，自引：2，他引：0  

唐承丽  陈伟杨  吴佳敏  周国华  王美霞  郭夏爽 《地理科学》2020,40(4):657-664

采用最近邻指数、Ripley’s L 函数、核密度估计等方法分析长江经济带开发区的空间分布与产业集聚特征,结果表明:① 长江经济带开发区总体上呈东密西疏、东强西弱、东中西段分异的显著集聚分布特征;② 基于主导产业划分的各类开发区在空间上均为集聚分布,集聚强度和规模随距离的增加基本都呈“先增加后减小”的规律,集聚形态各异,主要有“单核心”“双核心”“多核心”3种;③ 长江经济带东段地区主要以装备制造、通信电子、汽车制造、新材料、生物医药等资本技术密集型产业集聚为主,中、西段地区则集聚了化学工业、金属加工、食品制造、纺织服装等资本与劳动密集型产业。要加强经济带上中下游开发区之间的多维良性互动,注重绿色发展、创新发展与结构优化,进一步提升其对长江经济带高质量发展的引领与支撑作用。  相似文献   

大城市近郊农地流转的时空特征及影响因素     

许红梅  郭炎  李志刚  林赛南  李娈琼 《地理科学》2020,40(12):2055-2063

以武汉市蔡甸区为例，结合多源、多时段的村级农地流转数据，采用探索性空间分析和多元线性回归分析方法，揭示大城市近郊农地流转的时空特征及影响因素。研究发现：① 流转规模呈跨越式增长，经历快速增长和短期减速增长两个阶段，流转速度受土地政策影响较大；农地流转的空间分布由随机转向集聚，高高集聚区由主干道沿线转移至以农业为主的平原街镇，低低集聚区由不显著到集中于城镇化水平较高的街镇；② 控制自然、区位、社会经济等因素后，发现流转主体、流转用途对农地流转具有显著影响。建议清楚把握农地流转时空演化特征，合理选择流转主体和流转用途，以优化大城市近郊的人地关系，促进城乡统筹和乡村振兴。  相似文献   

“服务业区位分析”教学设计——以“武汉火神山医院区位分析”为例     

王亦茹  郭剑峰 《地理教学》2020,(10):26-29

本文围绕时事热点——新型冠状病毒引发的肺炎疫情,以“武汉火神山医院的区位”为例,对城乡规划中“服务业区位分析”一课进行教学设计,通过切入真实情境,挖掘地理原理,实施问题教学,以培养学生的综合思维、人地协调观等学科核心素养。  相似文献   

乡土资源在高中地理教学中的应用尝试     

苏燕萍  郭国金 《地理教学》2020,(1):46-47,26

乡土资源融入高中地理教学,不仅能够激发学生的学习兴趣,培养学生的综合思维,还能提高学生的地理实践能力。结合《普通高中地理课程标准(2017年版)》的相关要求,文章尝试性地利用乡土资源设计高中地理教学案例、编制地理试题和开展地理实践活动等。  相似文献   

地理大数据挖掘——目标、内涵与研究问题     

裴韬  宋辞  郭思慧  舒华  刘亚溪  杜云艳  马廷  周成虎 《地理学报(英文版)》2020,30(2):251-266

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Cryosphere evapotranspiration in the Tibetan Plateau: A review     

KunXin Wang  YinSheng Zhang  Ning Ma  YanHong Guo  YaoHui Qiang 《寒旱区科学》2020,12(6):355-370

Land surface actual evapotranspiration is an important process that influences the Earth's energy and water cycles and determines the water and heat transfer in the soil-vegetation-atmosphere system. Meanwhile, the cryosphere's hydrological process is receiving extensive attention, and its water problem needs to be understood from multiple perspectives. As the main part of the Chinese cryosphere, the Tibetan Plateau faces significant climate and environmental change. There are active interaction and pronounced feedback between the environment and ET_a in the cryosphere. This article mainly focuses on the research progress of ET_a in the Tibetan Plateau. It first reviews the ET_a process, characteristics, and impact factors of typical underlying surfaces in the Tibetan Plateau (alpine meadows, alpine steppes, alpine wetlands, alpine forests, lakes). Then it compares the temporal and spatial variations of ET_a at different scales. In addition, considering the current greening of cryosphere vegetation due to climate change, it discusses the relationship between vegetation greening and transpiration to help clarify how vegetation activities are related to the regional water cycle and surface energy budget.  相似文献