Long‐term change of daily and multi‐daily precipitation in southern Sweden

Daily rain series from southern Sweden with records dating back to the 1870s have been analysed to investigate the trends of daily and multi‐day precipitation of different return periods with emphasis on the extremes. Probabilities of extreme storms were determined as continuously changing values based on 25 years of data. An extra set of data was used to investigate changes in Skåne, the southernmost peninsula of Sweden. Another 30‐year data set of more than 200 stations of a dense gauge network in Skåne was used to investigate the relation between very large daily rainfall and annual precipitation. The annual precipitation has increased significantly all over southern Sweden due to increased winter precipitation. There is a trend of increasing maximum annual daily precipitation at only one station, where the annual maximum often occurs in winter. The number of events with a short return period is increasing, but the number of more extreme events has not increased. Daily and multi‐daily design storms of long return periods determined from extreme value analysis with updating year by year are not higher today than during the last 100 years. The largest daily storms are not related to stations with annual rainfall but seem to occur randomly. Copyright © 2013 John Wiley & Sons, Ltd.     

屏边—西畴山弧地体南缘发现铜镍多金属硫化矿

眤博铜镍多金属矿处于哀牢山地体、红河裂陷槽、屏边西畴山弧交汇派生的北西多条线性断裂收敛区,辉长橄榄岩为铜镍钴容矿岩体。重磁推测基性岩体规模巨大,有较大远景。矿床类型为岩浆深部熔离—单成贯入式铜镍多金属矿。     

菏泽市基本农田调查上图工作探讨

市级基本农田上图是以县级调查区域为单位,依据该地区土地利用总体规划,按照基本农田划定及补划、调整的相关资料,将基本农田保护片（块）落实到标准分幅土地利用现状图上,计算统计县级基本农田面积,并逐级汇总出市级基本农田面积。该文针对菏泽市基本农田调查上图工作保证措施、出现的问题及解决办法、主要上图成果及分析略作探讨。     

中国滑坡遥感

我国滑坡遥感已有20多a的历史,作为区域性滑坡宏观调查的主要手段曾为山区大型工程建设的滑坡灾害调查及防灾减灾工作 作出了重要贡献。上世纪末以来,由于采用了“数字滑坡技术”和高分辨率遥感数据,滑坡遥感成为能更准确的定性、定量的调查手 段,甚至可进行大型个体滑坡的详细调查和监测研究。“数字滑坡”技术的实现主要依赖于遥感技术、数字摄影测量及图像处理技术 、GIS技术和计算机技术的支持。该技术大致可分为3大部分： 滑坡基本信息获取、信息存贮和管理及专题服务技术。本文以三峡库 区、四川天台乡滑坡、金龙山滑坡及易贡滑坡遥感调查及监测说明“数字滑坡”技术的专题服务应用。     

基于VB2008的电子水准测量数据处理程序的设计与实现

本文主要介绍利用Microsoft Visual Basic 2008编写电子水准测量数据处理程序的方法,并通过对编写的电子水准测量数据处理程序的实际应用,证明该应用程序可以有效解决电子水准测量的数据传输、数据编辑、数据处理、数据整理、折线图绘制、测量等级检验等实际问题,且具有用户自定义和批处理功能,能有效地减少内业数据处理的工作量。     

Equilibrium Uptake and Bioaccumulation of Basic Violet 14 Using Submerged Macrophyte Hydrilla verticillata

The percentage removal and uptake capacity of Basic Violet 14 using Hydrilla verticillata with living biomass was studied under batch conditions. The survival of H. verticillata was studied using the chlorophyll content in the living biomass. Bioaccumulation of Basic Violet 14 using H. verticillata was tested by varying the wet sorbent dosage (0.5–2.5 g), initial pH (3–8), and initial dye concentrations (5–25 mg L^?1). The results show that the plant was effectively accumulating the Basic Violet 14 dye. The uptake capacity of Basic Violet 14 dye was observed as 5.9 and 21.3 mg g^?1 at the initial dye concentration of 5 and 25 mg L^?1, respectively, for a biomass of 5 g L^?1 (wet weight) at pH 7.0 for 144 h. In general, the plant growth was found to be normal at lower concentrations and showed higher removal efficiency. It was also observed that removal efficiency of H. verticillata was found to decrease with increase in initial dye concentration. The biomass sample surface was analyzed using SEM imaging and functional groups present in the biomass were analyzed using FTIR. The equilibrium uptake capacity was analyzed by Langmuir and Freundlich isotherms. The equilibrium data was found to be fit well to both Langmuir and Freundlich isotherm models with higher coefficient of determination.     

2000国家重力基本网部分站的最新绝对重力测量

为分析部分2000国家重力基本网点的长期稳定性,应用FG5/240绝对重力仪在该网的永兴岛和郑州站进行了绝对测量。对观测结果的处理表明,观测精度优于5×10 ^-8 ms ^-2 ;同时对观测值及其对应的2000国家重力基本网点的重力值进行了比较,得出两者之间重力值差异变化。     

黔桂边境大弄地区透闪石化基性岩的确定及其地质意义

分布在大弄地区岩墙状及岩脉状强透闪石化岩石,过去一直被认为是闪长岩。通过新近的1:5万区域地质调查工作,获得了大量岩石学和岩石地球化学资料,结合其形成的地质背景和产出的地质特征等,我们认为它们是基性岩,而非闪长岩,形成于825Ma左右。这类基性岩的确定,对研究江南造山带西南段新元古代早期Rodinia超大陆裂解有重要的科学意义。     

子夜均值数据处理软件自主开发和应用

通过对1995-2007年全国24个台站子夜均值数据的整理,总结出各类错误数据的特征,结合数据处理技术,利用Visual Basic语言编制了数据处理软件,建立一种自动化的错误数据识别方法,为数据整理和处理分析提供高效率的工具。为今后子夜均值数据的正确判断提供方便快捷的途径。     

青海地震应急基础数据的影响因素分析

对南北地震带基础数据调查反映出的问题总结归类,并通过分析,找出基础数据的影响因素,以便今后在收集和更新基础数据时,找到更有效的方法和途径。在努力提高基础数据可靠性的同时优化数据库,更加方便、及时地进行基础数据库更新维护。