GIS地图数据库的研究与实现

将地形图和地质图等进行处理和数字化,然后在GIS平台Arc GIS中建立空间数据库,采用Oracle作为后台数据库,使用空间数据引擎Arc SDE来管理Arc GIS对数据的访问,实现显示、查询、管理和下载等功能。     

Fluctuation in Ommastrephe bartrami yield in the North Pacific

The fluctuation in Ommastrephe bartrami yield from 1995 to 2001 in the North Pacific was shown obvious, on which this study was conducted using data of sea surface temperature (SST), chlorophyll-a (chl-a) and statistical production. The study shows that, cool water and low food abundance caused by abnormal Kuroshio resulted in the reduction in abundance of O. bartrami, which was worsened by excessive catch and the unawareness to local fishery resources protection.     

GPS伪卫星组合技术及其应用于形变监测的可行性研究

在形变监测中,传统的监测方法因实时性、连续性不强,自动化不高,已无法满足人们的需要。如今,GPS弥补了传统方法的不足,加之精确度较高,其理论和技术已在大地测量、地壳运动监测、精密工程测量等诸多领域得到了广泛的应用。GPS应用于变形监测,使得监测系统的数据采集、传送、处理和分析的自动化很容易实现,但对于GPS全球卫星定位系统,其定位精度、     

Fluctuation in <Emphasis Type="Italic">Ommastrephe bartrami</Emphasis> yield in the North Pacific

The fluctuation in Ommastrephe bartrami yield from 1995 to 2001 in the North Pacific was shown obvious, on which this study was conducted using data of sea surface temperature (SST), chlorophyll-a (chl-a) and statistical production. The study shows that, cool water and low food abundance caused by abnormal Kuroshio resulted in the reduction in abundance of O. bartrami, which was worsened by excessive catch and the unawareness to local fishery resources protection. Supported by National Key Project for Basic Research of China (2005CB422300)