从气候角度浅谈云南人的性格     

普琼珍  杨长荣  徐嫩羽 《气象知识》2021,(1):63-67

天悠悠,地悠悠,自从盘古开天辟地,女娟造人的传说开始,人世间就有了世代流转的千奇百怪、人与自然和谐相处的典范——云南,物华天宝,生存环境多样化、民俗多样性、由气候物化引起的谜团也多姿多彩,如:云南人为什么“黑”?为什么善良可爱?又为什么那么“憨”?这些都或多或少地与这个地气物化大系统有关,甚至是生死攸关的连锁交替循环。物化,也即事物的连锁反应和由此带来的演变、合成,相当于量变到质变的演绎。  相似文献   

支持向量机及其在地震预报中的应用前景   总被引：2，自引：0，他引：2       下载免费PDF全文

王炜  林命週  马钦忠  赵利飞 《地震工程学报》2006,28(1):78-84

统计学习理论(SLT)是研究小样本情况下机器学习规律的理论。支持向量机(SVM)基于统计学习理论,可以处理高度非线性分类和回归等问题,不但较好地解决了小样本、过学习、高维数、局部最小等实际难题,而且具有很强的泛化(预测)能力。本文介绍了支持向量机的分类、回归方法,分析了这一方法的特点,讨论了该方法在地震预报中的应用前景。  相似文献   

Application of Wavelet Decomposition to Removing Barometric and Tidal Response in Borehole Water Level     

Yan Rui  )  Huang Fuqiong )  Chen Yong ) ) China Earthquake Networks Center  Beijing  China) Institute of Earthquake Science  Beijing  China) Institute of Geophysics  China Earthquake Administration  Beijing  China 《中国地震研究》2007,21(4)

Wavelet decomposition is used to analyze barometric fluctuation and earth tidal response in borehole water level changes. We apply wavelet analysis method to the decomposition of barometric fluctuation and earth tidal response into several temporal series in different frequency ranges. Barometric and tidal coefficients in different frequency ranges are computed with least squares method to remove barometric and tidal response. Comparing this method with general linear regression analysis method, we find wavelet analysis method can efficiently remove barometric and earth tidal response in borehole water level. Wavelet analysis method is based on wave theory and vibration theories. It not only considers the frequency characteristic of the observed data but also the temporal characteristic, and it can get barometric and tidal coefficients in different frequency ranges. This method has definite physical meaning.  相似文献   

Uncertainty of the Numerical Solution of a Nonlinear System‘s Long-term Behavior and Global Convergence of the Numerical Pattern     

HU  Shujuan 《大气科学进展》2004,(5)

1. Introduction The partial di?erential equations for atmosphericmovement are often nonlinear and often very complex;we usually cannot obtain an analytic solution but must?nd a numerical solution. The general method is ?rstto discretize the space varia…  相似文献   

Research Project Entitled “The Dynamics and Physical Processes in The Weather and Climate System“ --Part Ⅰ: A Brief Introduction     

LUO  Yunfeng 《大气科学进展》2004,(5)

1. Introduction Human activities including social and economic de-velopments, are closely related to the change of theweather and climate system. Since the beginning oftime, weather and climate, which are the general termsfor the entire range of phenom…  相似文献   

Strong earthquake activity all over the world and strong-moderate earthquake activity within and near China Febraury, 2004 ～ March, 2004)     

CHEN  Pei-shan 《地震学报(英文版)》2004,17(4):507-508

Illustration 　　All the data in this catalog are chosen from the “Preliminary Seismological Report of Chinese Seismic Stations“(Its abbreviation is“Monthly Report“). The catalog includes the events of M≥4.7 in and near China and M≥6 all over the world. The“Monthly Report“is monthly compiled by the Ninth Section of Institute of Geophysics, China Earthquake Administration.……  相似文献   

小波分析在地壳形变资料处理中的应用          下载免费PDF全文

张燕  )吴云  )刘永启)施顺英  ) 《地震学报》2004,26(7):103-109

小波变换的时频分析和奇异性检测特性,使得其在非稳态信号处理中有不可抵挡的优势，本文用已知的合成信号对这两个特性进行了分析和说明. 对几次地震前的形变时间序列资料（定点潮汐形变观测、GPS观测）作了小波变换. 结果发现:地震前约4个月左右，震中周围的几个定点形变台站都接收到周期为几天到十几天的异常信号；而地震前震中周围的几个GPS观测站均同时接收到周期为3个月到半年左右的异常信号，不同的地震异常出现的时间不一样. 这些同时出现在多个台站或观测站的同频段的异常信号是可能的地震前兆.   相似文献   

单次冲击能量及P em>-Sem>曲线测桩法          下载免费PDF全文

许昭永)段永康)王  彬)胡毅力)杨润海)许  峻)赵晋明) 《地震学报》2004,26(7):131-140

通过研究打桩公式法和应力波动法（如CASE法），提出单次冲击能量及P-S曲线测桩法:用重锤或小型火箭筒一次冲击桩顶，用桩顶附近的检波器记录振波图和检测静、动位移. 通过实测冲击能(总能量)转换系数、波动和振动各自消耗的能量等各物理量，测定计算单桩竖向承载力. 利用振波图计算力（P）与位移（S）动态关系曲线，确定屈服点，并利用静载荷试验检验动测结果和确定动静P-S曲线的相关常数，进而确定与承载力相应的沉降量. 而且，可由PS曲线的形态判定桩身成型质量.   相似文献   

Geochemistry of the ophiolite and oceanic island basalt in the Kangxian-Pipasi-Nanping tectonic melange zone, South Qinling and their tectonic significance     

LAI Shaocong  ZHANG Guowei  PEI Xianzhi & YANG HaifengKey Laboratory of Continental Dynamics  Ministry of Education  Department of Geology  Northwest University  Xi''''an  China Correspondence should be addressed to Lai Shaocong 《中国科学D辑(英文版)》2004,(2)

Detailed studies indicate that Kangxian-Pipasi-Nanping tectonic zone is a complicated melange zone which includes many tectonic slabs of different origins. Ophiolite (MORB-type basalt), oceanic island tholeiite and alkaline basalt have been identified. Moreover, this tectonic melange zone is eastward connected with the Mianlue suture zone. The deformation characteristics, consisting components and volcanic rock geochemical features for the Kangxian-Pipasi-Nanping tectonic melange zone are much similar to those of the Mianlue suture zone and Deerni ophiolite. Therefore, the Kangxian-Pipasi-Nanping tectonic melange zone should be the westward extension part of the Mianlue suture zone. It indicates that the Mianlue suture zone had extended to the Nanping area.  相似文献   

A 2.8 Ma record of environmental evolution and tectoni events inferred from the Cuoe core in the middle of Tibetan Plateau     

SHEN Ji  Lü Houyuan  WANG Sumin  CHEN Shiyue  YANG Xiangdong  WU Yanhong & ZHU Zhaoyu .Nanjing Institute of Geography  Limnology  Chinese Academy of Sciences  Nanjing  China  .Institute of Geology  Geophysics  Chinese Academy of Sciences  Beijing  China  .Guangzhou Institute of Geochemistry  Chinese Academy of Sciences  Guangzhou  China Correspondence should be addressed to Shen Ji 《中国科学D辑(英文版)》2004,(11)

The uplift of the Tibetan Plateau is the most im-portant event in the Cenozoic Era. It has been provedthat the rising Plateau is of great significance to globalatmospheric circulation and climate change. It has alsoinfluenced the transmission and balance of the globalmatter and energy[1—3]. The uplift of the Plateau is un-doubtedly true, but there have long been argumentsabout the process and mode of the Plateau uplift. Didthe Plateau rise as a whole or partly? Did it rise oncefor all or …  相似文献