搜索结果: 1-15 共查到“知识库 地壳与地形学”相关记录364条 . 查询时间(1.312 秒)
新疆数字地貌的关键技术与应用研究
新疆 数字地貌 关键技术
2023/8/19
Nature:由流变性质和地表过程控制的造山带地形(图)
流变性质 地表过程控制 造山带地形
2023/1/14
NG:地形应力对岩体滑坡规模的控制(图)
地形应力 岩体滑坡 控制 中国科学院地质与地球物理研究所
2023/1/14
青藏高原东北缘祁连山造山带至阿拉善地块壳幔电性结构研究
青藏高原东北缘 祁连山造山带 阿拉善地块 壳幔电性结构
2019/3/19
在青藏高原东北缘祁连山造山带至阿拉善地块之间完成了一条372 km的大地电磁剖面,通过二维反演计算,获得了沿剖面180 km深的壳幔电性结构模型,结合研究区地质和地球物理资料开展综合分析,研究结果表明:(1)剖面自南向北所经过的祁连山造山带、走廊过渡带和阿拉善地块对应3种壳幔电性结构模型:东祁连壳幔高-低-高阻似层状电性结构、河西走廊壳幔低阻带状电性结构和阿拉善南缘壳幔高-低-高阻层状电性结构.(...
地壳密度是表征其物质组成以及结构特征的一个基本参数,是深入理解构造演化、地球动力学等问题的重要基础.本文利用最新发布的布格重力异常数据,以现有的三维S波速度模型、地表热流以及岩石学数据作为约束条件,采用引入深度加权函数的三维重力反演算法,获取了南极大陆三维精细密度结构模型.研究结果显示,南极大陆地壳尺度范围内密度异常在-0.25~0.20 g·cm-3之间.大致以南极横断山脉为界,受中生代与新生代...
LANDFORM PERCEPTION ACCURACY IN SHADED RELIEF MAPS: A REPLICATION STUDY CONFIRMS THAT NNW LIGHTING IS BETTER THAN NW AGAINST THE RELIEF INVERSION EFFECT
Relief inversion effect Terrain reversal effect Shaded relief maps
2018/11/9
Relief inversion effect is a perceptual phenomenon that leads to an inverted perception of convex and concave shapes. This perceptual inversion occurs in scenes where the shading/shadows act as the ma...
利用青藏高原东北缘2011-2014年期间的流动重力与GPS观测资料和1970-2011年水准观测获得的垂直运动背景场资料,结合区域地质构造动力环境和区内发生的强震事件,系统分析了区域重力场变化、地壳三维形变与区域构造环境和强震活动的关系,进一步研究和探讨了区域重力场变化与区域三维地壳运动的时空分布特征及其机理。结果表明:1)测区内重力场变化与GPS观测反映的水平运动和水准观测反映的垂直运动在空间...
根据煤岩壳质组各显微组分的纹理特点及其差异,采用基于人类视觉感知的Tamura纹理描述方法,提取其粗糙度、对比度、方向度、线像度、规则度等特征量,对壳质组显微组分中角质体、藻类体和树皮体等3类组分典型样本进行描述,并对特征量的可区分性进行分析。鉴于壳质组显微组分样本数的局限,构建适合于小样本分类问题的支持向量机分类器,分别采用不同特征量及特征量组合对3种典型组分进行分类。实验结果表明:单个特征难以...
STUDY ON SITE CONDITIONS BASED ON TOPOGRAPHIC SLOPE
DEM, Topographic Slope, Vs30, Site Conditions
2018/5/15
The travel-time averaged shear-wave velocity to a depth of 30m (Vs30) below the Earth’s surface is widely used to classify sites in many building codes. Vs30 is also used to estimate site classificati...
THE STUDY OF WATERSHED TOPOGRAPHY CHARACTERISTICS IN VAKHSH RIVER BASED ON ZY3-DSM
ZY3-DSM the Catchment Boundary Profile Line the Longitudinal Valley Profile Line the Terrain Complexity Indices the Landform Development Indices
2018/5/11
The Vakhsh River is one of the major rivers in Tajikistan. The quantitative analysis of watershed topography and developmental characteristics in Vakhsh River catchment can reflect the morphological c...
SEMI AUTOMATED LAND COVER LAYER UPDATING PROCESS UTILIZING SPECTRAL ANALYSIS AND GIS DATA FUSION
NTDB (National Topographic Data Base), Segmentation, Classification, nDSM, data fusion
2018/5/11
Technological improvements made in recent years of mass data gathering and analyzing, influenced the traditional methods of updating and forming of the national topographic database. It has brought a ...
THERMAL EFFECTS ON CAMERA FOCAL LENGTH IN MESSENGER STAR CALIBRATION AND ORBITAL IMAGING
Mercury, MESSENGER, MDIS Camera Digital Terrain Models
2018/5/11
We analyse images taken by the MErcury Surface, Space ENviorment, GEochemistry, and Ranging (MESSENGER) spacecraft for the camera’s thermal response in the harsh thermal environment near Mercury. Spec...
RESEARCH ON THE CRUSTAL DEFORMATION CHARACTERISTICS IN BEIJING USING INSAR AND GNSS TECHNOLOGY
Beijing INSAR GNSS Crustal Deformation Geological structure
2018/5/14
In this paper, we tried to reveal the characteristics of the crustal deformation in both the horizontal and vertical directions in Beijing using InSAR and GNSS observations. Regarding the serious land...
Lg波Q值随震源深度的变化作为地壳本征衰减深度的判据
Lg波 衰减 品质因子Q值 合成地震图
2019/3/19
Lg波的QLg值是描述区域地壳结构及介质衰减特性的重要参数之一,QLg层析成像被广泛应用于地壳衰减结构横向不均匀性的研究中.但是,对QLg在垂直方向上的不均匀性的研究较少.当发现一个地区发生QLg值低时,我们希望进一步了解这种介质衰减深度.本文通过数值模拟合成地震图的方法,通过分析不同震源深度和介质模型计算QLg,判断Lg波发生主要衰减的深度.研究结果显示:(1)当震源深度浅时,上地壳介质衰减对于...