【摘 要】
:
地理信息系统,它能把各种信息用地理和相关的视图结合起来,利用计算机图形与数据库技术来采集,分析数据,从而为土地利用,城市规划以及政府部门管理提供新知识为工程设计和规
论文部分内容阅读
地理信息系统,它能把各种信息用地理和相关的视图结合起来,利用计算机图形与数据库技术来采集,分析数据,从而为土地利用,城市规划以及政府部门管理提供新知识为工程设计和规划,管理决策服务.作为基础测绘测量,需要不断地学习,不断地更新技术,学好用好地理信息系统,为社会提供更好的数字产品.
其他文献
随着国度无界限,文化无国度的到来,全球化与多元化的发展,带来了价值观念的混乱,同时让我们陷入了“多元化”的选择困境之中。我们该如何选择适合自己的价值观,更好地选择自己的人
Catalytic wet air oxidation (CWAO) was investigated in laboratory-scale experiments for the treatmentof o-chlorophenol in wastewater. Experimental results showe
The influence of strain rate and temperature on the tensile behavior of as-cast and HIPed NiAl-9Mo eutectic alloywas investigated in the temperature range of 70
The effect of hydrogen on the dezincification layer-induced stress and the susceptibility to SCC was investigated.Experimental results showed that the dezincifi
The wetting behavior of molten Bi on polycrystalline Cu substrate and single crystal Cu substrate was studied bythe sessile drop method in the temperature range
The cavity growth was studied in uniaxial tension of superplastic magnesium alloy. An exponentially increasing cavity growth model was introduced into the numer
To understand the forming behaviour of magnesium alloys, the upsetting test of Mg alloys at evaluated temperature was conducted. It is found that Mg alloys are
The effects of RE modification on structure and the properties of a new cast hot-work die (CHD) steel were investigated. The grains of the CHD steel are refined
该篇文章以中国的上市公司间的并购为样本,收集了近8年的收购公司的经验证据,研究了收购公司并购后三年内的长期股票绩效,研究发现收购公司的长期股票绩效总体并不明显。而进行
橡胶混凝土的研究应用不但可以回收利用废旧轮胎,有益环境,还可以改善普通混凝土的性能缺陷,因此,具有广阔的应用前景.