河北省GPS水汽与PM2.5质量浓度的比较研究

利用河北省GPS观测数据,结合同期PM2.5质量浓度数据,开展GPS水汽与PM2.5质量浓度的比较研究。结果发现,GPS水汽与PM2.5的显著性sig值小于0.01,相关系数大于0.6,两者存在显著的正相关特性。     

方目网囊对蓝圆Shen和多齿蛇鲻的选择性比较

为检测方目网囊对蓝圆Shen和多齿蛇鲻的选择作用，2000年11－12月在南海北部海域试验了4种目大的方目网囊。结果表明，方形网目网囊有利于释放纺缍形（如蓝圆Shen），圆形或近圆形（如多齿蛇鲻）两种形体鱼类的小，幼鱼，且对后者的释放效果更好。当网囊目大分别为45，50mm时，蓝圆Shen的50％选择体长（L0．5）分别为121.22,128.77mm；当网囊目大分别为40，45，50mm时，多齿蛇鲻的L0．5分别为124.12,126.75,139.32mm。通过不同目大网囊对蓝圆Shen，多齿蛇鲻选择性比较分析，发现50mm目大方目网囊的选择效果效果优于40，45mm目大的网囊，因此，在南海区拖网渔业中采用50mm目大的方目网囊是必要的，同时建议将150mm作为蓝圆Shen，多齿蛇鲻的最小可捕叉长标准。     

鱼肉液体制曲的工艺条件

研究在鱼鲜酱油的酿制中，采用鱼肉液体制曲提高蛋白利用率并利用制曲过程去除鱼腥味。探讨了制曲温度，制曲时间，种曲添加量对鱼肉液体制曲的影响，分析了液体曲的蛋白酶活力和制曲过程对鱼腥物质三甲胺（TMA）的消除情况。结果表明，制曲温度为40℃，制曲时间为24h，种曲添加量0．4％为最佳制曲条件，此时，液体曲的蛋白酶活力为245Iu/mL，制曲过程对甲胺的去除率可达74．7％。     

A CASE STUDY ON CONCENTRATION AND DECENTRALIZATION：BEHAVIOR AND DYNAMIC MECHANISM OF SPATIAL EVOLUTION IN METROPOLITAN AREA，NANJING，CHINA

In rapid socio-economic development,the process of concentration and dispersal of various elements tends to be more dramatic,tremendously influencing the shaping and transformation of the space in metropolitan area.Survey of spatial concentration and decentralization has thus become a basic method in examining metropolitan spatial evolution.In this research,three elements were selected as the essential indicators of the process:demographic density distribu-tion,employment density distribution and business office location.Performance of these elements in Nanjing City was exam-ined historically.As Nanjing City could be regarded as a representative of metropolitan areas in China,its situation large-ly suggestes the general characteristics in similar areas of China.Hence based on the investigation of Nanjing City,four general implications were highlighted.First ,metropolitan areas in China are in a violent process and shift of spatial concentra-tion and decentralization.Second,from now to at least the near future,concentration will continue to be the central fea-ture.Third,the landscape of metropolitan areas basically exhibits a dual structure character.The gap in environmental and ecological qualities among different districts will continue for a long time.Fourth,Central Business District (CBD) is playing an important role in helping to convert the traditionally single-centered city structure into a polycentric one.     

PRELIMINARY STUDY ON THE FLOODING AND DROUGHT CLAMITY DURING PAST 1500 YEARS IN THE HAI′AN REGION，JIANGSU PROVINCE

Collection and arrangement of the historical records of climatic changes and environment evolution,espectial-lyin the aspect of calamities,are made on the history documents of past 1500 years about Haiˊan region,Jiangsu Province.There existed two obvious flooding-drought frequently-occurring periods:one was from 1550 AD to 1850 AD and another was 100 AD to 1200AD.The period of 1550 AD to1850 AD is interrupted by two relatively arid and cold climatic periods:one was from 1630 AD to 1700 AD and another was 1750 AD to 1820 AD.The main characteristic of the calamity periods is that they occurred by turns,and sometimes,both drought and flooding occurred in the same year.The instability of the climatic changes in the Little Ice Age may be the main reason of the frequently-occurring flooding and drought in Haiˊan region.Research results also show that the frequently-occurring periods of flooding and drought is in close relationship with the solar activity,and therefore,occurrence of the flooding and drought may be in relation with the intensity of the solar activity.This hypothesis may need further study in the future.     

虚拟现实技术在地理信息系统中的应用

本文分析了虚拟现实技术的构成和技术特点，介绍了虚拟地理信息系统（VR－GIS）的特点及其应用。     

松辽流域东南部地区“95．7”特大洪水分析

从降水过程，暴雨时空分布，洪水发生时间及过程，洪水组成特征和洪水稀遇程度等几方面，分析了1995年7月中，下旬发生在松辽流域东南部地区的特大洪水。     

油气勘探数据仓库的建设及春相关技术

从油气勘探的角度阐述了数据仓库在该领域的应用，并从油气勘探数据仓库建设，数据仓库的结构体系，相关技术及其决策支持系统四个方面对油气勘探数据仓库系统开发进行了论述。     

初论西藏冈底斯带中段尼木西北部班岩铜矿地质特征

西藏冈底斯带尼木西北部具有斑岩型铜矿产出的有利地质条件，已有厅宫，冲江，白容，岗讲，渡布曲等铜矿床（点），可望形成大型－超大型班岩铜矿集中区，其资源量远景可达400－600万t以上，在分析地背景的基础上，总结了矿床的地质特征，并与国内外斑岩铜矿进行了对比，建立了本区铜矿的综合遥感地质找矿模型。