从某銅矿談中小型矽卡岩矿床的勘探     

曹垣晴 《中国地质》1963,(11)

一、中小型矽卡岩矿床的特点中小型矽卡岩矿床,一般矿体数目較多,分布在灰岩或矽卡岩带中没有明显的規律性,矿体規模不大,矿体形态复杂,有用成分分布不均匀。这些特点在辽宁某中小型矽卡岩型銅矿是比較典型的。該矿区位于辽河群地层形成的背斜北翼,火成岩沿北西构造方向侵入,伴随的岩墙岩脉活动极其复  相似文献   

作物生长模拟模式的现状和研究方向          下载免费PDF全文

矢岛正晴  吉书琴 《气象与环境学报》1990,7(3):55-56

一、前言定量地描述作物生理现象、气象条件等环境因素与作物生态的关系,研究能够说明和预测作物生长发育和产量形成过程的作物生长模拟模式,不仅可以预报作物产量,而且可以用于评价某一地区潜在的生产力、农业生产的风险分析、确定作物的种植条件和适宜种植期,以及根据作物的生育诊断采取  相似文献   

地下水动态预测的灰色双控模型   总被引：1，自引：0，他引：1  

徐霞晴 《水文》1994,(6):42-46

地下水动态预测的灰色双控模型徐霞晴（江苏省连云港水文水资源勘测处）在地下水资源评价和预测中，由于地下水动态的变化受水文、气象、水文地质和人类活动等因素的影响，从而导致用于地下水动态预测的方法较多。在现有的众多预测方法中，对预测值及其变幅和预测方法大多...  相似文献   

郑国光局长许小峰副局长沈小农司长对内蒙古成立60周年大庆气象保障服务工作致信慰问     

晴山 《内蒙古气象》2007,(4):40

本刊讯 日前,中国气象局郑国光局长、许小峰副局长、沈小农司长给内蒙古气象局局长乌兰发来短信,对内蒙古成立60周年大庆气象保障服务的全体工作人员表示慰问并提出明确要求.……  相似文献   

西藏“雪绒石”岩石学特征研究     

邓晴晴  施光海 《地质论评》2023,69(Z1):26-28

  相似文献   

基于轮廓似然估计的广义极值分布在地震中长期预测中的应用          下载免费PDF全文

赵宜宾  张艳芳  王福昌  任晴晴 《地震学报》2022,44(6):1061-1071

为描述强震预测的不确定性,在地震预报极值分析模型的参数估计中,引入轮廓似然估计法。对广义极值分布中形状参数和地震重现水平的轮廓似然估计原理及数值算法进行了详细地阐述,并利用构建的广义极值分布模型对东昆仑地震带进行了地震危险性分析。关于形状参数和重现水平的点估计,以及10年以内的重现水平置信区间的估计,轮廓似然估计法与极大似然估计法效果基本相同,但在中长期地震重现水平置信区间的预测中,轮廓似然估计法得到的关于置信水平不对称的置信区间,在强震水平下对预测震级的不确定性表达更准确,预测结果更加有效。   相似文献   

基于水文模型的蒸散发数据同化研究进展   总被引：1，自引：0，他引：1  

占车生  董晴晴  叶文  王会肖  王飞宇 《地理学报》2015,70(5)

本文系统综述了基于水文模型的蒸散发数据同化研究,阐述了蒸散发作为非状态变量构建数据同化演算关系的难点和瓶颈,并系统分析了利用当前各种通用水文模型进行蒸散发同化的可行性.基于此,尝试提出了一种易于操作且具有水循环物理机制的蒸散发同化新方案,该方案利用具有蒸散发—土壤湿度非线性时间响应关系的分布式时变增益模型(DTVGM),并进一步完善DTVGM蒸散发机理,构建基于DTVGM水文模型的蒸散发数据同化系统.该新方案将为区域蒸散发精确模拟提供新的思路和借鉴.  相似文献   

Impacts of Sea Surface Temperature on the Interannual Variability of Winter Haze Days in Guangdong Province     

刘晴晴  李春晖  谷德军  郑彬  林爱兰  彭冬冬 《热带气象学报(英文版)》2023,29(2):168-178

The impact of sea surface temperature (SST) on winter haze in Guangdong province (WHDGD) was analyzed on the interannual scale. It was pointed out that the northern Indian Ocean and the northwest Pacific SST play a leading role in the variation of WHDGD. Cold (warm) SST anomalies over the northern Indian Ocean and the Northwest Pacific stimulate the eastward propagation of cold (warm) Kelvin waves through the Gill forced response, causing Ekman convergence (divergence) in the western Pacific, inducing abnormal cyclonic (anticyclonic) circulation. It excites the positive (negative) Western Pacific teleconnection pattern (WP), which results in the temperature and the precipitation decrease (increase) in Guangdong and forms the meteorological variables conditions that are conducive (not conducive) to the formation of haze. ENSO has an asymmetric influence on WHDGD. In El Ni?o (La Ni?a) winters, there are strong (weak) coordinated variations between the northern Indian Ocean, the northwest Pacific, and the eastern Pacific, which stimulate the negative (positive) phase of WP teleconnection. In El Ni?o winters, the enhanced moisture is attributed to the joint effects of the horizontal advection from the surrounding ocean, vertical advection from the moisture convergence, and the increased atmospheric apparent moisture sink (Q2) from soil evaporation. The weakening of the atmospheric apparent heat source (Q1) in the upper layer is not conducive to the formation of inversion stratification. In contrast, in La Ni?a winters, the reduced moisture is attributed to the reduced upward water vapor transport and Q2 loss. Due to the Q1 increase in the upper layer, the temperature inversion forms and suppresses the diffusion of haze.  相似文献   

畜舍小气候研究进展   总被引：1，自引：0，他引：1  

戴小笠  何晴 《内蒙古气象》1999,(1):28-31

对几年来畜舍小气候的研究尤其是国内的研究进展作了大致介绍。在通风技术方面主要介绍有利通风的畜舍结构和目前通风方式。有关温度控制、有害物体及尘埃控制以及小气候综合模拟几方面分别叙述了各自的进展情况。  相似文献   

ANALYSIS OF THE ATMOSPHERIC AEROSOL OPTICAL DEPTH OVER CHINA IN 1980s   总被引：1，自引：0，他引：1       下载免费PDF全文

罗云峰  李维亮  周秀骥  何晴  倾继祖 《Acta Meteorologica Sinica》2000,(4)

This paper retrieves the yearly and monthly mean 0.75μm aerosol optical depth(AOD)of 41A-class solar radiation stations over China from 1979 to 1990,and analyzes the spatial andtemporal distribution of AOD over China mainland.The data employed are daily direct solarradiation and sunshine duration,as well as the TOMS version-7 ozone observation data in the sametime.The results indicate that the Siehuan Basin is the largest center of yearly mean AOD overChina.and the other two larger centers lie in Wuhan City and the South Xinjiang Basin,separately.AOD values are also relatively larger in the middle-and-lower reaches area ofChangjiang River.Shandong Peninsula and coastal area of Guangdong Province:while in YunnanProvince,coastal area of Fujian Province.most parts of Northwest and Northeast China,AODvalues are relatively smaller.The distribution of AOD varies with different months.In most partsof China.the maximum of AOD occurs in spring season;but the minimum varies in differentregions,From 1979 to 1990.in the Qinghai-Xizang Plateau,West Siehuan Basin,North GuizhouProvince.most areas of the middle-and-lower reaches of Changjiang River,Shandong Peninsulaand west part of South Xinjiang Basin.AOD shows an increasing trend.But in Northeast China,most part of Northwest China,Yunnan-Guizhou Plateau,western Guangxi Region and the coastalareas of East China,AOD shows decreasing tendency.Generally,the seasonal variationcharacteristics of AOD in China can be classified into four typical models,i.e.,mono-modal typesA and B,bimodal and Poly-modal.  相似文献