节气气候变化与上消化道出血的关系研究

通过对2000-2005年龙岩市第一医院上消化道出血（UGB）患者入院时的节气归属及当时气象资料的收集,分析不同节气气候变化与UGB的关系,运用最优子集回归方法建立关系模式进行综合分析,得出影响上消化道出血发病趋势的关键气象要素是节气最高气温、最低气温、平均水汽压;通过节气气候因素对UGB影响的认识,提出相应的预防保健措施。     

内蒙古夏季干旱的水汽输送特征分析

对于大气中水汽的定性、定量测量是提高内蒙古干旱研究与预测的有效手段。利用NCEP再分析资料和内蒙古地区实测降水资料（1961-2000年），定性、定量地分析东亚水汽分布、水汽输送与内蒙古夏季干旱的关系。得出内蒙古地区上空低层大气的含水量偏少是内蒙古夏季干旱的一个重要因素。由于青藏高原大地形作用，孟加拉湾和南海的水汽北上受阻，不能达到内蒙古高原是形成内蒙古干旱的又一原因。受大气环流影响，内蒙古高原水汽辐合偏弱是内蒙古夏季干旱的重要原因。青藏高原的水汽通量与内蒙古东西部降水都存在明显负相关；孟加拉湾至内蒙古西部是内蒙古西部地区降水的水汽通道，南海至中国东北地区为内蒙古东部降水的水汽通道。     

省级自动站中心站的系统结构与维护

介绍了省级自动站中心站的系统结构，通过对建设和运行阶段出现的问题进行分析，着重讨论了省级中心站系统各部分之间的功能与联系以及日常维护工作中的注意事项。     

谈《长春市真彩色影像地图集》的设计与编制

地图设计是十分复杂的脑力劳动，是生产地图产品各环节的技术依据，优秀的地图产品必须要有好的技术设计来指导。本文主要通过介绍《长春市真彩色影像地图集》技术设计的编写及影像地图集编制过程畅谈一下自己的体会。     

近邻点指数法测度澜沧江流域居民地空间分布类型

居民地分布情况间接地映射着区域的经济发展与城市布局,为研究居民点的分布特征,采用聚落地理学的邻点指数方法测度。以澜沧江流域为例,对流域不同类型居民地以及流域所涉及不同地区的居民地的分布特征进行分析研究。     

UPS及UPS用蓄电池的使用

介绍了UPS和UPS用蓄电池的分类，从蓄电池容量、蓄电池寿命、单个蓄电池电压、蓄电池所能承受的纹波系数以及蓄电池性能均一性等五方面介绍了选用UPS用蓄电池时应注意的问题。     

晋中秋白菜生长后期冻害天气预报研究及对策

依据秋白菜冻害发生前不同的天气条件,将冻害分为干冷型和湿冷型2种类型,并针对秋白菜的生理特点及对气象观测资料的研究,归纳出2型的冻害气象指标。在反查了大量的历史天气图基础上,选取08时天气图上某一范围作为预报关键区,建立了2型冻害的72h、48h、24h各预报时效的进型条件、起报条件和消空指标,综合组成了秋白菜的冻害预报系统。在1992年～1999年的试报中,各预报时效准确率平均达86%,取得了较满意得效果。     

eCognition技术在高分辨率遥感影像信息提取中的应用

本文提出了面向对象的多尺度分割策略,针对不同尺度的地物信息采用不同的分割尺度,在此基础上构建多尺度分割等级网,实现了地物信息的分层提取。以北京怀柔区QuickBird遥感影像为试验区进行信息提取,给出了多尺度分割参数的设置规律,获得了较好的效果,总体精度为84．82%。     

Genesis of the Changba–Lijiagou Giant Pb-Zn Deposit, West Qinling, Central China: Constraints from S-Pb-C-O isotopes

The extensive Changba-Lijiagou Pb-Zn deposit is located in the north of the Xihe–Chengxian ore cluster in West Qinling. The ore bodies are mainly hosted in the marble, dolomitic marble and biotite-calcite-quartz schist of the Middle Devonian Anjiacha Formation, and are structurally controlled by the fault and anticline. The ore-forming process can be divided into three main stages, based on field geological features and mineral assemblages. The mineral assemblages of hydrothermal stage I are pale-yellow coarse grain, low Fe sphalerite, pyrite with pits, barite and biotite. The mineral assemblages of hydrothermal stage II are black-brown cryptocrystalline, high Fe shalerite, pyrite without pits, marcasite or arsenopyrite replace the pyrite with pits, K-feldspar. The features of hydrothermal stage III are calcite-quartz-sulfide vein cutting the laminated, banded ore body. Forty-two sulfur isotope analyses, twenty-five lead isotope analyses and nineteen carbon and oxygen isotope analyses were determined on sphalerite, pyrite, galena and calcite. The δ34 S values of stage I(20.3 to 29.0‰) are consistent with the δ34 S of sulfate(barite) in the stratum. Combined with geological feature, inclusion characteristics and EPMA data, we propose that TSR has played a key role in the formation of the sulfides in stage I. The δ34 S values of stage II sphalerite and pyrite(15.1 to 23.0‰) are between sulfides in the host rock, magmatic sulfur and the sulfate(barite) in the stratum. This result suggests that multiple S reservoirs were the sources for S2-in stage II. The δ34 S values of stage III(13.1 to 22‰) combined with the structure of the geological and mineral features suggest a magmatic hydrothermal origin of the mineralization. The lead isotope compositions of the sulfides have 206 Pb/204 Pb ranging from 17.9480 to 17.9782, 207 Pb/204 Pb ranging from 15.611 to 15.622, and 208 Pb/204 Pb ranging from 38.1368 to 38.1691 in the three ore-forming stages. The narrow and symmetric distributions of the lead isotope values reflect homogenization of granite and mantle sources before the Pb-Zn mineralization. The δ13 CPDB and δ18 OSMOW values of stage I range from-0.1 to 2.4‰ and from 18.8 to 21.7‰. The values and inclusion data indicate that the source of fluids in stage I was the dissolution of marine carbonate. The δ13 CPDB and δ18 OSMOW values of stage II range from-4 to 1‰ and from 12.3 to 20.3‰, suggesting multiple C-O reservoirs in the Changba deposit and the addition of mantle-source fluid to the system. The values in stage III are-3.1‰ and 19.7‰, respectively. We infer that the process of mineralization involved evaporitic salt and sedimentary organic-bearing units interacting through thermochemical sulfate reduction through the isotopic, mineralogy and inclusion evidences. Subsequently, the geology feature, mineral assemblages, EPMA data and isotopic values support the conclusion that the ore-forming hydrothermal fluids were mixed with magmatic hydrothermal fluids and forming the massive dark sphalerite, then yielding the calcite-quartz-sulfide vein ore type at the last stage. The genesis of this ore deposit was epigenetic rather than the previously-proposed sedimentary-exhalative(SEDEX) type.     

津巴布韦大岩墙南段两翼铬铁矿床特征及成因探讨

津巴布韦大岩墙蕴含丰富的铬铁矿资源，不同部位成矿特征存在差异。钙碱性铁质基性-超基性岩浆结晶分异过程中伴随着铬铁矿的成矿作用，南部岩浆房两翼300 m深度范围内共赋存7个不连续的铬铁矿层，矿层垂向间距30~50 m，南部矿层发育优于北部；铬铁矿层厚度多为0.2~1 m，铬铁矿层发育于辉橄岩系和辉石岩系的接触部位，三者呈渐变式过渡接触，共同构成典型的韵律结构；两翼矿层产状呈对称状倾向于岩墙的轴部，倾角约为10°~20°；矿石多为自形-半自形微细粒结构，稀疏浸染状及中等浸染状构造，矿石为需选贫铬矿石，w（Cr₂O₃）=5%~30%，且矿体内Pt+Pd含量可观。大岩墙南段两翼铬铁矿为典型的早期岩浆结晶分异矿床，后期构造运动加剧了矿层的不连续性，并对局部岩矿层产状产生改造，蛇纹石化蚀变形成了指示矿体的标志性斑杂构造岩。