中国海岸带及近海科学数据平台研究与开发

基于海洋数据的多样性和时空复杂性的特点,采用目前先进的大型空间数据库管理软件——Oracle9i的ArcSDE,ArcGIS桌面系统,完成了海岸带及近海科学数据平台实体的装载和组织工作,并在ArcObject组件的基础上开发了基于C/S的数据平台的前端管理系统,当前该系统可以实现面向海洋用户的遥感数据无缝拼接、多源数据多种快速查询、提取、影像数据的装载以及影像元数据的管理和修改等多种功能.该系统主要服务对象是涉及国家主管海岸带和近海专业的科研调查部门或个人,自其建立以来已经陆续开展一些应用服务,达到了理想的效果,满足了用户的需求.     

The incidence of plastic ingestion by fishes: From the prey’s perspective

One of the primary threats to ocean ecosystems from plastic pollution is ingestion by marine organisms. Well-documented in seabirds, turtles, and marine mammals, ingestion by fish and sharks has received less attention until recently. We suggest that fishes of a variety of sizes attack drifting plastic with high frequency, as evidenced by the apparent bite marks commonly left behind. We examined 5518 plastic items from random plots on Kamilo Point, Hawai’i Island, and found 15.8% to have obvious signs of attack. Extrapolated to the entire amount of debris removed from the 15 km area, over 1.3 tons of plastic is attacked each year. Items with a bottle shape, or those blue or yellow in color, were attacked with a higher frequency. The triangular edges or punctures left by teeth ranged from 1 to 20 mm in width suggesting a variety of species attack plastic items. More research is needed to document the specific fishes and rates of plastic ingestion.     

Oracle9i空间数据存储的研究

介绍了Oracle9i实现GIS空间数据和属性数据一体化存储的原理,重点阐述了地理空间各类实体的Oracle数据库存储结构,并给出了基于SQL—PLUS和MapX数据上载的实例。     

LQC—Ⅱ型三维电阻率采集系统的设计研究

本文设计一种三维并行直流电法勘探系统：LQC—Ⅱ型三维电阻率采集系统,由主机、电测子站和多模式智能电极三部分组成。主机控制电测子站完成16通道、24位数据电性数据的并行采集与传输,每个电测子站控制与之相连的16个电板的同步与状态转换。以1台主机控制16个电测子站和256个智能电极对水池低阻体模型进行电极扫描式测量,获取32640个数据的测量为例,整个测量时间约30分钟。     

热液铀矿床中的红化问题

按红化与铀矿化形成的先后关系,将热液铀矿床(特别是碱交代型铀矿床)中的红化划分出三种成因类型:原生红化、同生红化和后生红化。其中后生红化又分为次生红化和表生红化。讨论了红化不同成因类型的可能形成机理:空洞效应导致原生红化;铁—铀氧化还原作用导致同生红化;辐射作用导致次生红化;O_2对Fe~(2+)的氧化作用导致表生红化。作出了在成矿热液所处的物理化学条件下铁—铀氧化还原反应的pH—Eh图和pH—PUO_2图。肯定了在成矿热液所处的物化条件下铁—铀反应的可能性。原生红化与矿化关系不大,它作为开放式碱交代的标志之一:同生红化与矿化关系密切;次生的红化可作为构成找矿标志的一个因素;表生红化意义不大。     

An oracle-based data management method for large database in CyberCity GIS

An Oracle8i-based approach is proposed to manage the integrated databases of large CyberCity. This approach consists of three schemes: ? a special R+-tree index is designed to accelerate spatial retrieving, in which the bounding boxes of local regions have no intersection and all leaf nodes of the R+-tree (geometry records) have no repetition; ∪ different data compression algorithms are adopted to compress the digital elevation models, 3D vector models and images, such as LZ77 lossless compression algorithm for compression of vector data and JPEG compression algorithms for texture images; ? in order to communicate with Oracle8i database, a CyberCity GIS spatial database engine (SDE) is designed. On the basis of this SDE prototype a case study is done.     

IKONOS影像生产1：10000地理信息产品的研究

简要介绍了IKONOS卫星遥感影像适用于地理信息产品生产的特点，然后通过试验生产，并与传统的航片相比较，详细分析了利用IKONOS影像作为数据源生产1：10000基础信息产品在精度、生产流程、工作效率、生产周期、外业工作量和价格等方面的情况。     

神府矿区活鸡兔矿井烧变岩水害防治工程研究

活鸡免矿井是神木北部矿区首批建设的现代化煤矿之一，于2000年12月投产，生产原煤800万t/a。由于该矿井范围内煤层上部（垂距21-30m）赋存有10.97km^2烧变岩裂隙含水层，其静储量高达130万m^3，单孔涌水量可达2000m^3/d，对煤矿的安全开采构成了巨大威胁。同时，烧变岩裂隙水双是可供矿区开发利用的宝贵水资源，为消除水害隐患及合理利用地下水资源，采用了钻孔泄水方式将烧变岩裂隙水引入矿区供水系统，既保证了矿井的安全生产，又取得了巨大的经济效益与环境效益。     

A comparison of three gravity inversion methods for crustal thickness modelling in Tibet plateau

Crustal thickness can be determined by gravimetric methods based on different assumptions, e.g. by isostatic hypotheses. Here we compare three gravimetric inversion methods to estimate the Moho depth. Two Moho models based on the Vening Meinesz-Moritz hypothesis and one by using Parker-Oldenburg’s algorithm, which are investigated in Tibet plateau. The results are compared with CRUST2.0, and it will be presented that the estimated Moho depths from the Vening Meinesz-Moritz model will be better than the Parker-Oldenburg’s algorithm.     

口虾蛄超氧化物歧化酶同工酶的组织特异性研究

以口虾蛄为材料进行研究，用聚丙烯酰胺凝胶电泳法，对其肌肉、心脏、腹鳃、肝胰腺及眼球5种组织器官进行超氧化物歧化酶(SOD)同工酶的研究分析。结果表明：不同组织中超氧化物歧化酶(SOD)的同工酶谱带存在差异，具有明显的组织特异性。眼球、腹鳃、肝胰腺和心脏中有2条酶带，肌肉中几乎不表达，心脏中SOD2和肝胰腺中SODl谱带表达最浓，而腹鳃中的酶带表达最弱。