提出了一种基于空间小面元模型(space-patch model,SPM)的序列影像密集点云重构方法。顾及SPM灰度一致性约束和空间几何约束,通过种子点的获取、扩散和滤波,生成密集SPM以逼近物体表面。该方法突破了传统核线影像密集匹配条件苛刻的限制。利用狮子影像数据,进行了密集点云模型的重构实验,验证了该算法的有效性。设计了几类对比试验,分析了扩散迭代次数和滤波对模型点云质量的影响。结果表明,对高
The economic growth of China has led to increasing growth disparities between regions. Such disparities are uncontrolled and are severely negative symptoms in the process of economic development. On t
To clarify the responses of plant functional traits to nitrogen(N) enrichment, we investigated the whole-plant traits(plant height and aboveground biomass), leaf morphological(specific leaf area(SLA)
This paper presents the development of numerical prediction products(NPP) correction and display system(NPPCDS) for rapid and effective post-processing and displaying of the T213 NPP(numerical predict
启动全球系统建设,目标精度为2.5米。2014年公布北斗系统ICD文件2.0版与服务性能规范1.0版。该年被业界称为"北斗应用元年",北斗系统产生的经济和社会效益显著。2013年12月27日我国正式发布北斗卫星系统提供区域服务能力,向亚太大部分地区提供正式服务。2012年12月27日北斗系统成功发射了第16颗卫星,完成卫星组网。2012年10月26日北斗系统已发射10颗卫星,建成了基本系统,开始对
Forest net primary productivity(NPP) is a key parameter for forest monitoring and management. In this study, monthly and annual forest NPP in the northeastern China from 1982 to 2010 were simulated by
The floodplain vegetation of the Tarim River in Northwest China is strongly influenced by irrigated agriculture. The abstraction of river water disturbs the natural dynamics of the floodplain ecosyste
Traditional opinion considers that natural resources play an important positive role in economic development, while resource curse theory holds that natural resources usually obstruct economic increas
Economic clusters have been a central focus of current urban and regional research, policies and practices. However, a methodology to identify and analyze policy-relevant economic cluster dynamics is