攀西铁矿成矿带地质矿产特征及找矿方向

本文通过对攀西地区区域地质、区域矿产特征的分析,综合地球物理、遥感解译资料,共划分出4个找矿远景区：冕宁泸沽一喜德登相营富铁矿找矿远景区、盐源矿山梁子-牛厂富铁矿找矿远景区、太和一攀枝花钒钛磁铁矿远景区、西昌德昌兴隆．会理龙泉铁矿远景区。指出远景区内岩浆晚期分异型铁矿床、火山沉积变质型铁矿床等为主攻矿种。     

古地磁讲学和应用研讨会在桂林召开

1987年9月16日至26日在桂林举办了一次“古地磁讲学和应用研讨会”（以下简称研讨会）。来自中国有色金属工业总公司、地质矿产部、国家地震局、中国科学院、冶金工业部、核     

气象信息传输中WLAN的安全应用

为保证WLAN内的数据安全,通过对主动及被动攻击方式的特点进行分析,提供了硬件路由器的设置,网络版杀毒软件的安装及VPN的设置等用于具体防范,使WLAN能在气象信息传输中更安全应用。     

会东-东川地区平顶山组金矿化层位与找矿方向

通过对播卡、新田、小溜口金矿矿化层位的对比研究,认为其矿化层位同属于汤丹群平顶山组。金矿赋矿地层平顶山组为成矿提供了主要物质来源,播卡金矿、新田金矿属于构造蚀变岩型金矿床。认为会东-东川地区平顶山组的找金工作,应以地层、岩浆岩、断裂、蚀变为重要线索。新田矿区及其外围、播卡金矿区控矿剪切破碎带南延地段、小溜口-人民凹-燕子岩地区有继续寻找同类型矿床的潜力。     

玛纳斯河流域绿洲生态经济功能区划研究

生态功能区划是寻求人类与自然和谐共处的有效途径.运用地理信息系统工具提取遥感图像数据,定性分析与定量评价相结合,对玛纳斯河流域绿洲进行生态经济功能区划.研究表明:玛纳斯河流域绿洲可以划分为4个生态经济功能亚区.该划分有助于为玛纳斯河流域绿洲资源开发、产业布局、灾害防治、环境综合整治、生态建设及经济发展分区管理提供科学依据.     

九华山风景区地热调查与分析

通过调查,初步查明地热分布及外围的地层、构造,分析研究它们与地热显示、地热异常的关系,推断地热的导水和储水构造;初步圈定地热异常的范围,为进一步勘查、开发九华山风景区地热提供决策依据。     

轨道运动对BiSAR海浪成像的影响

速度聚束调制是研究BiSAR海浪成像机理的一个重要方面,而海浪的轨道运动是速度聚束调制产生的根源。在平飞非等速情况下,本文以单色波为例,建立了含有轨道速度和加速度扰动的海面回波模型,推导了BiSAR海浪图像强度的表达式。当收发平台取适当的参数时,数值计算表明BiSAR是可以对一定条件下的海浪成像,并比较了单站SAR和双站SAR海浪图像的异同点。     

1986-2015年小浪底水库运行前后黄河下游主槽调整规律

Based on the measured discharge,sediment load,and cross-sectional data from 1986 to 2015 for the lower Yellow River,changes in the morphological parameters(width,depth,and cross-sectional geomorphic coefficient)of the main channel are analyzed in this paper.The results show that before the operation of the Xiaolangdi Reservoir(XLDR)from 1986 to 1999,the main channel shrunk continually,with decreasing width and depth.The rate of reduction in its width decreased along the river whereas that of depth increased in the downstream direction.Because the rate of decrease in the width of the main channel was greater than that in channel depth,the cross-sectional geomorphic coefficient decreased in the sub-reach above Gaocun.By contrast,for the sub-reach below Gaocun,the rate of decrease in channel width was smaller than that in channel depth,and the cross-sectional geomorphic coefficient increased.Once the XLDR had begun operation,the main channel eroded continually,and both its width and depth increased from 2000 to 2015.The rate of increase in channel width decreased in the longitudinal direction,and the depth of the main channel in all sub-reaches increased by more than 2 m.Because the rate of increase in the depth of the main channel was clearly larger than that of its width,the cross-sectional geomorphic coefficient decreased in all sub-reaches.The cross-sectional geometry of the main-channel of the lower Yellow River exhibited different adjustment patterns before and after the XLDR began operation.Before its operation,the main channel mainly narrowed in the transverse direction and silted in the vertical direction in the sub-reach above Aishan;in the sub-reach below Aishan,it primarily silted in the vertical direction.After the XLDR began operation,the main channel adjusted by widening in the transverse direction and deepening in the vertical direction in the sub-reach above Aishan;in the sub-reach below it,the main channel adjusted mainly by deepening in the vertical direction.Compared with the rates of decrease in the width and depth of the main channel during the siltation period,the rate of increase in channel width during the scouring period was clearly smaller while the rate of increase in channel depth was larger.After continual siltation and scouring from 1986 to 2015,the cross-sectional geometry of the main-channel changed from wide and shallow to relatively narrow and deep.The pattern of adjustment in the main channel was closely related to the water and sediment conditions.For the braided reach,the cross-sectional geomorphic coefficient was negatively correlated with discharge and positively correlated with suspended sediment concentration(SSC)during the siltation period.By contrast,the cross-sectional geomorphic coefficient was positively correlated with discharge and negatively correlated with SSC during the scouring period.For the transitional and meandering reaches,the cross-sectional geomorphic coefficient was negatively correlated with discharge and positively correlated with SSC.     

注浆技术在处理冲（钻）孔灌注桩混凝土桩身缺陷中的应用

通过工程实例介绍注浆技术处理冲(钻)孔灌注桩桩身缺陷的工艺流程、工艺设备、操作方法及施工质量控制要点，并对注浆处理的机理、工艺参数进行了初步探讨。