地图投影在地理信息系统中的作用及配置研究

地图投影是地理信息系统(GIS)的空间定位框架,它对地理信息系统的影响已渗透到各个方面。本文通过分析国外地理信息系统中地图投影的设计与配置,认为高斯投影和Lambert投影是适合我国国情的GIS地图投影。     

屏幕跟踪矢量化技术在房屋震害预测中的应用

本文探讨屏幕跟踪矢量化在保定市房屋抗震防灾预测 GIS系统研究过程中的应用 ,并着重介绍了地理信息系统地图投影、坐标变换和最小二乘法在矢量化中的基本原理 ,以及屏幕跟踪矢量化在保定市城区地图矢量化应用过程。     

地理信息科学专业教学内容拓展及实践教学方法研究

文章针对地理信息科学教学中存在的问题,重点就教学内容和实践教学方法进行了研究与探讨。信息技术的飞速发展促使地理信息科学必须对教学内容进行拓展,包括网络电子地图的地图投影、视频传感器GIS应用技术、网络开发技术,同时要开展多种形式的实践活动,提高学生的实践动手能力,包括第二课堂、项目带动和科技活动。     

GIS采用高斯-克吕格地图投影技术的研究

系统介绍了高斯-克吕格地图投影的计算技术,给出了实际地理信息系统使用高斯-克吕格地图投影的计算方法,为地理信息系统的开发与使用提供了技术参考.     

连续型遗传算法和遗传规划在投影变换中的应用初探

回顾了地图投影变换的基本方法,阐述连续型遗传算法和遗传规划的原理和方法,探讨这两优化方法在地图投影变换中的应用.     

地理信息系统专业双语教学课程建设

阐述了地理信息系统（GIS）专业双语教学的必要性和可行性,提出了地理信息系统专业软件双语教学课程建设的目标、内容和关键问题,探索该专业GIS软件双语教学课程建设的思路和主要特色,进行GIS软件双语教学课程实践分析及讨论存在的问题。     

利用Google Map API开发轻量级GIS桌面应用程序之初探

以运用C#2010.net语言、JavaScript 脚本开发水文站实时信息 GIS 展示软件为实例,提出了在无专业GIS服务器的前提下,利用Google Map API开发基于WinForm的桌面GIS软件的技术思路,并提供了核心的程序代码。     

农林院校“GIS软件及应用”实验课程的教学改革与实践——以西北农林科技大学为例

从西北农林科技大学农业特色的GIS专业培养目标出发,对"GIS软件及应用"实验课程内容组织、教学模式和考核方式等进行探讨和改革,建立并实践了具有农林特色的专业软件的教学方案,从根本上提高了农林类GIS的教学质量。     

基于SNMP的GIS软件与资源的监控管理系统

基于SNMP(Simple Network Management Protocol,简单网络管理协议)的GIS(Geography Information System,地理信息系统)软件与资源的监控管理系统,主要是利用SNMP简单易行的网络管理技术对GIS软件以及GIS的各种数据资源进行宏观管理和分析,对GIS软件的使用状态或流程以及GIS资源的使用状况进行监控和预警,从而达到最有效的使用GIS软件及其资源的目的。     

地理信息系统的发展趋势

随着地理信息系统(GIS)技术在各个应用领域的推广使用,GIS技术与地理空间信息的表示、处理、分析和应用手段的不断发展紧密相连,形成了各种不同功能的GIS系统软件。介绍了GIS的定义,分析了当前GIS的应用方向和发展状况,并着重阐述了GIS今后的发展趋势及其应用领域。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.