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分形几何在储层微观非均质性研究中的运用
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作者 杨昭 《石化技术》 CAS 2016年第12期134-134,共1页
本文通过研究分形几何在储层微观非均质性中的应用原理,并进一步阐明应用方法,以供广大读者参考学习。
关键词 分层几何 油气储层 非均质性 应用
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一种服务机器人家庭全息地图构建方法研究 被引量:2
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作者 吴培良 孔令富 赵逢达 《计算机应用研究》 CSCD 北大核心 2010年第3期981-985,共5页
提出了一种满足家庭服务机器人环境认知和智能服务需要的融合环境和目标信息的家庭全息地图。设计了局部几何—全局拓扑的全息地图分层表示模型。分析了机器人坐标系、局部环境坐标系和目标的相对关系,给出了机器人局部环境自定位算法... 提出了一种满足家庭服务机器人环境认知和智能服务需要的融合环境和目标信息的家庭全息地图。设计了局部几何—全局拓扑的全息地图分层表示模型。分析了机器人坐标系、局部环境坐标系和目标的相对关系,给出了机器人局部环境自定位算法和基于坐标变换的服务机器人全息地图构建方法。家庭环境下机器人实物实验表明,基于局部几何—全局拓扑表示的全息地图,服务机器人路径规划和任务执行效率得到有效提升。 展开更多
关键词 家庭服务机器人 家庭全息地图 几何-拓扑分层模型 QR code标签
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Late-Quaternary Movement Along the Sertengshan Piedmont Fault and a Model for Segmentation of Its Rupture
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作者 ChenLiehun RanYongkang YangXiaoping GuoWensheng 《Earthquake Research in China》 2004年第1期67-78,共12页
Analysis and study of the geometrical structure of the fault, tectonic features of late Quaternary movement, paleoseismic activity, and structural characteristics of boundaries between segments of the Sertengshan pied... Analysis and study of the geometrical structure of the fault, tectonic features of late Quaternary movement, paleoseismic activity, and structural characteristics of boundaries between segments of the Sertengshan piedmont fault permitted us to preliminarily determine the following 4 active segments of the fault: the Wujiahe segment (from Dongwugai Gully to Dahoudian Village), Wujumengkou Dongfeng Village segment (from Dahoudian to Delingshan), Dashetai segment (from Delingshan to Xiaoshetai Gully mouth), and the Ulan Hudong segment (from Xiaoshetai Gully mouth to Tailiang). The boundaries between them are the Dagoudian mountain spur, the Delingshan Mountain spur and the step zone at Xiaoshetai Gully mouth, respectively. The segments are independent for seismic activity. However, it is possible that joint ruptures between Wujiahe and Wujumengkou Dongfeng Village segments and between Dashetai and Ulan Hudong segments may occur. 展开更多
关键词 Sertengshan piedmont fault Active fault Segmentation PALEOSEISMICITY
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提高光栅衍射计算收敛性的途径 被引量:9
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作者 周传宏 王磊 王植恒 《物理学报》 SCIE EI CAS CSCD 北大核心 2001年第6期1046-1051,共6页
从数学原理、几何分层 ,以及数值计算三方面 ,分析了耦合波法在计算光栅衍射时的收敛性问题 ,提出了改善计算收敛性的途径 .并明确指出对于不同的光栅问题 ,影响计算收敛性的主要因素是各不相同的 ,计算时应该针对具体的问题采用相应的... 从数学原理、几何分层 ,以及数值计算三方面 ,分析了耦合波法在计算光栅衍射时的收敛性问题 ,提出了改善计算收敛性的途径 .并明确指出对于不同的光栅问题 ,影响计算收敛性的主要因素是各不相同的 ,计算时应该针对具体的问题采用相应的改善方法 . 展开更多
关键词 耦合波法 校正傅里叶展开 多层近似 收敛 光栅衍射 数学原理 几何分层 数值计算
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A survey on the local refinable splines 被引量:1
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作者 LI Xin CHEN FaLai +1 位作者 KANG HongMei DENG JianSong 《Science China Mathematics》 SCIE CSCD 2016年第4期617-644,共28页
This paper provides a survey of local refinable splines,including hierarchical B-splines,T-splines,polynomial splines over T-meshes,etc.,with a view to applications in geometric modeling and iso-geometric analysis.We ... This paper provides a survey of local refinable splines,including hierarchical B-splines,T-splines,polynomial splines over T-meshes,etc.,with a view to applications in geometric modeling and iso-geometric analysis.We will identify the strengths and weaknesses of these methods and also offer suggestions for their using in geometric modeling and iso-geometric analysis. 展开更多
关键词 geometric modeling isogeometric analysis B-splines hierarchical B-splines T-splines polynomial splines over hierarchical T-meshes(PHT-splines) locally refined(LR)B-splines local refinement
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Surface geometry and magnetism of Eu@C_(60) monolayer on Ag(111)
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作者 ZHAO ZhiWei WANG Jing LIU Ying 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第9期1589-1593,共5页
The surface geometry, electronic structure, and magnetism of Eu@C60 monolayer absorbed on Ag(111) have been investigated within the framework of density functional theory. The Eu@C60 monolayer has been constructed on ... The surface geometry, electronic structure, and magnetism of Eu@C60 monolayer absorbed on Ag(111) have been investigated within the framework of density functional theory. The Eu@C60 monolayer has been constructed on Ag(111) substrate by one of the hexagon faces of C60 downward and its mirror plane face parallel to Ag(111). The Eu@C60 monolayer induces a recon- struction of the Ag(111) substrate and the perpendicular distance between the Eu@C60 and Ag(111) surface is 2.06 A, being shorter than that between C60 and Ag(lll) surface by 0.05A. There is no chemical bond formed between the Eu@C60 and Ag(111), and only 0.55e transferred from Ag(111) to Eu@C60. A large magnetic moment about 6.80/μB per unit cell is found for Eu@C60/Ag(111) system. 展开更多
关键词 endohedral fullerene two-dimensional C60 domain magnetic organic molecule
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