期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
大别造山带地壳泊松比结构与超高压变质带——来自宽角反射与近垂直反射剖面的启示 被引量:9
1
作者 李英康 董树文 +2 位作者 张中杰 高锐 卢德源 《地质论评》 CAS CSCD 北大核心 2002年第1期15-23,共9页
综合宽角反射、近垂直反射的探测结果和有关地质资料,对大别造山带地壳结构和超高压变质带研究显示:大别造山带地壳具有层块结构特征。沿安义—庄墓剖面,上地壳有7个弹性块体,中地壳有5个,下地壳有4个。扬子与华北地块的主缝合带是超高... 综合宽角反射、近垂直反射的探测结果和有关地质资料,对大别造山带地壳结构和超高压变质带研究显示:大别造山带地壳具有层块结构特征。沿安义—庄墓剖面,上地壳有7个弹性块体,中地壳有5个,下地壳有4个。扬子与华北地块的主缝合带是超高压变质带,扬子地块与大别造山带的现今分界线是与郯庐断裂相交的太湖—马庙断裂,磨子潭—晓天断裂是大别造山带的北界,北淮阳构造带呈楔状向下插入,它与华北地块的分界是肥中断裂。郯庐断裂在中、上地壳近于直立,下地壳向西倾斜。超高压变质带的厚度为5~7km,产状向北插入到北大别块体之下,折返过程是构造就位,不是大别山的均匀抬升,折返的主运动面是水吼—五河高温剪切带。 展开更多
关键词 大别造山带 弹性特征 层块结构 超高压变质带 缝合带 地壳结构
下载PDF
Simultaneous Partitioning and Scheduling Algorithm for Clustered Architecture
2
作者 王磊 魏少军 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2004年第4期383-387,共5页
Clustered architecture is selected for high level synthesis,and a simultaneous partitioning and scheduling algorithm are proposed.Compared with traditional methods,circuit performance can be improved.Experiments show ... Clustered architecture is selected for high level synthesis,and a simultaneous partitioning and scheduling algorithm are proposed.Compared with traditional methods,circuit performance can be improved.Experiments show the efficiency of the method. 展开更多
关键词 high level synthesis SCHEDULING partitioning clustered architecture
下载PDF
Zonal disintegration phenomenon in rock mass surrounding deep tunnels 被引量:9
3
作者 WU Hao FANG Qin GUO Zhi-kun 《Journal of China University of Mining and Technology》 EI 2008年第2期187-193,共7页
Zonal disintegration is a typical static phenomenon of deep rock masses. It has been defined as alternating regions of fractured and relatively intact rock mass that appear around or in front of the working stope duri... Zonal disintegration is a typical static phenomenon of deep rock masses. It has been defined as alternating regions of fractured and relatively intact rock mass that appear around or in front of the working stope during excavation of a deep tunnel. Zonal disintegration phenomenon was successfully demonstrated in the laboratory with 3D tests on analogous gypsum models, two circular cracked zones were observed in the test. The linear Mohr-Coulomb yield criterion was used with a constitutive model that showed linear softening and ideal residual plastic to analyze the elasto-plastic field of the enclosing rock mass around a deep tunnel. The results show that tunneling causes a maximum stress zone to appear between an elastic and plastic zone in the surrounding rock. The zonal disintegration phenomenon is analyzed by considering the stress-strain state of the rock mass in the vicinity of the maximum stress zone. Creep instability failure of the rock due to the development of the plastic zone, and transfer of the maximum stress zone into the rock mass, are the cause of zonal disintegration. An analytical criterion for the critical depth at which zonal disintegration can occur is derived. This depth depends mainly on the character and stress concentration coefficient of the rock mass. 展开更多
关键词 block-hierarchical structure zonal disintegration phenomenon enclosing rock mass around deep tunnel equivalent material stress concentration coefficient
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部