【摘 要】
：
The Tibetan plateau as one of the youngest orogen on the Earth was considered as the result of continent-continent collision between the Eurasian and Indian plates.The thickness and structure of the c
【出 处】
：
Earthquake Science
论文部分内容阅读
The Tibetan plateau as one of the youngest orogen on the Earth was considered as the result of continent-continent collision between the Eurasian and Indian plates.The thickness and structure of the crust beneath Tibetan plateau is essential to underst
其他文献
近些年来,在图像处理和计算机视觉领域,人脸自动检测引起许多学者的关注。它是诸如人脸跟踪、人脸识别、人脸检索等应用的前提和基础。同时由于它的准确性和有效性直接影响这些系统的应用,也被认为是人脸识别系统得以实际应用的关键技术。本文在介绍国内外人脸检测研究进展的基础之上,详细讨论了基于图像块的人脸检测方法。
针对广义模糊熵图像阈值分割法中参数m的选取问题,提出一种利用优化算法自适应选取参数的广义模糊熵阈值分割方法.该方法通过粒子群优化算法,依据图像分割质量评价准则对参数m在(0,1)区间进行全局寻优,并依据广义模糊熵最大准则对S型隶属度函数中的3个参数(a,b,d)进行全局组合寻优,从而实现了广义模糊熵图像阈值分割方法的自动阈值选取.实验结果表明,该方法对光照不均匀图像具有更好的分割效果.
用代表点替代类均值代表类、用加权距离替代欧氏距离作为样本与类之间的相似性度量,由此建立一种新的无监督数据聚类算法.提取指标对分类所作贡献大小的量化值,以此为启发性知识定义加权距离,建立了用质心修正当前代表点的迭代算法.与均值聚类等序贯算法不同,基于质心的迭代算法的批处理性可消除输入产生的随机性干扰.采用IRIS数据和Breast Cancer数据验证了该算法的有效性.
一、军用物资集装运输向配套化方向发展早在二次世界大战期间,美军就采用了托盘化包装来运输弹药等物资。由于托盘化、集装化包装具有效率高,管理使用方便,适于空投、空运和节省费用等特点,因此,在二战后得到了大量发展。
随着科技的发展,近年来伪造证件的犯罪势头有所上升,如何采用合适的手段应对,防止此类犯罪的蔓延,是一个亟待解决的问题。在当前经济迅速发展的形式下,采用相应的高科技手段是较为行之有效的解决办法。通过对目前国内外较为流行的磁卡、IC卡及射频卡等防伪技术进行认真分析后,二维条码突出的防伪性能及较低的成本使之在防伪技术中脱颖而出。由于二维条码适合快速机读,
Uncertainties are common in the dating of paleoearthquakes.To improve the credibility of the dating of paleoearthquakes,analysis was done on fault activity,sedimentary environment and seismo-geomorpho
This paper presents the damage in the meizoseismal region of the M_S8.0 Wenchuan earthquake,Sichuan,China,and the seismic intensities determined according to "the Chinese Seismic Intensity Scale",and
The aftershock activity of the May 12,2008 Wenchuan M_S8.0 Earthquake Sequence shows an obvious segmented feature.Most of the large aftershocks were distributed in the north and south parts of the aft
This paper demonstrates an atmospheric correction method to process MODIS/Aqua (Moderate-resolution Imaging Spectroradiometer) ocean color imagery over turbid coastal waters with the aid of concurrent
Fold terminations are key features in the study of compressional fault-related folds.Such terminations could be due to loss of displacement on the thrust fault or/and forming a lateral or oblique ramp