YTI-A视频时码插入器的研制

在人造卫星观测的ＣＣＤ图象记录中，为方便图象保存，查阅及图象处理，将图象记录中的相关信息插入记录的图象中是十分重要的。ＹＴＩ－Ａ视频时码插入器正是为此应用而设计。本仪器内有一个可自动与后面板输入秒同步到１μｓ的数字钟。记录日期包括年月日，时刻记录精度为１０μｓ，望远镜指向（Ａ，ｈ）的记录精度为１″。这些信息全部以二种格式被插入记录的图象中可供图象处理时查阅和快速读出。文中叙述了仪器原理及应用     

鳄鱼捕手之死

2006年9月初,有人在知名视频共享网站YOUTUBE发布了一些视频片断,通过视频的标题可以看出是有关史蒂夫·欧文的,其中有一个视频的标题为“绝对真实的史蒂文最后时刻”,只有短短的几十秒钟,点击率却很高。由于该视频内容涉及史蒂夫·欧文被刺鳐刺伤致死的整个过程,所以被划定必须通过身份认证才能观看,以免被一些未成年人观看后产生不良后果。     

APPLICATION OF GEOGRAPHICAL PARAMETER DATABASE TO ESTABLISHMENT OF UNIT POPULATION DATABASE

Now GIS is turning into a good tool in handling geographical, economical, and population data, so we can obtain more and more information from these data. On the other hand, in some cases, for a calamity, such as hurricane, earthquake, flood, drought etc., or a decision-making, such as setting up a broadcasting transmitter, building a chemical plant etc., we have to evaluate the total population in the region influenced by a calamity or a project. In this paper, a method is put forward to evaluate the population in such special region. Through exploring the correlation of geographical parameters and the distribution of people in the same region by means of quantitative analysis and qualitative analysis, unit population database (1km× 1km) is established. In this way, estimating the number of people in a special region is capable by adding up the population in every grid involved in this region boundary. The geographical parameters are obtained from topographic database and DEM database on the scale of     

ANALYSIS ON THE SPATIAL DISTRIBUTION VARIATION CHARACTERISTIC OF URBAN HEAT ENVIRONMENTAL QUALITY AND ITS MECHANISM——A Case Study of Hangzhou City

Urban heat environmental quality(UHEQ) is affected by the interacting of weather condition and underlying surface framework of urban area .In the last two decades,many researchers from domestic and overseas have studied many problems at the aspect of urban heat environment such as urban heat islands ,urban air temperature and their rela-tion with urban land cover,city population,air pollution etc,In the recent years,Hangzhou,acting as a center city of Zhejiang Province in China,its urbanization quantum and quantity have both changed greatly,in particular ,representing as business affairs building,resident real property and all kins of specialty market having arisen in built-up zone,Based on Landsat TM images data in 1991 and 1999,urban underlying surface temperature value and Normalized Difference Vegetation Index (NDVI) were calculated using image interpreting and supervised classification technique by remote sensing software ERDAS image 8.4,The relation model between urban underlying surface temperature (UUST )and urban air temperature was setup according to the certain correlation patten .Reference to the relational standard of assessing human comfort and other meteorology data of Hangzhou City in summer,the spatial distribution characteristic and the spatial varia-tion degree of human comfort of heat environmental quality are estimated and mapped on a middle scale,that is ,in six districts of Hangzhou City .Then the paper reveals the main characteristic of spatial variation from 1991 to 1999.Lastly,the change mechanism is analyzed and discussed from the viewpoint of city planning,construction and environmental protec-tion.     

地理信息系统课程教学内容研究

在对目前地理信息系统飞速发展现状和教学内容进行对比分析的基础上，论述对地理信息系统专业课程教学内容进行改革的必要性。针对目前高等院校地理信息系统专业的课程内容调整，提出了基于实践教学的地理信息系统教学内容改革的基本思路。     

三维城市模型及其显示技术

三维城市模型把城市各种人工与自然地物表示成依比例和透视关系搭建的三维模型，在计算机上建立类似于缩微城区模型的效果图，以三维立体的形式展现城市的视景图像。从数据源、显示技术和应用领域等方面讨论三维城市模型的设计和应用，并对实现快速构模的方法进行了研究。     

"3S"技术在海域勘界中的应用

介绍了“3S”技术在海域勘界工作中的应用，并以2002年粤桂线海域勘界为例，详细地说明了这些新技术在海域勘界中所起的作用。对这些新技术的应用潜力，尤其为公平、公正、科学地划分涉界双方的海域界线提供技术支撑和今后在海域勘界信息系统中的发展方向作了展望。     

长江口深水航道数学模型信息系统研究

利用GIS二次开发软件ArcView，完成数学模拟所需的计算网格生成及线边界法中地形数据提取的优化。集成ArcView、Visual Basic及长江口潮流数学模型，实现了数值模拟计算成果的三维可视化及实时互动的动态演示。所开发的长江口数学模型信息系统能根据整治工程需要，提交各类工程数据库。