飞秒激光角膜基质透镜切除术治疗中高度近视散光的临床研究

目的:飞秒激光角膜基质透镜切除(femtosecond lenticule extraction,FLEx)术治疗中高度近视散光并与标准的LASIK术比较,探讨FLEx术的安全性、有效性、可预测性。方法:随机选取行角膜屈光手术的中高度近视散光(近视度数-3.00^-10.00D,散光度≤-6.00D)患者86例172眼,分为两组进行研究,86眼使用FLEx术(A组),86眼使用标准准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)(B组),随访6mo,记录术后裸眼视力、最佳矫正视力、客观验光值、裂隙灯检查、术后有无并发症、角膜瓣厚度、眼压、角膜地形图。

基于VR技术的永定土楼展示系统的设计

基于VR技术的永定土楼展示系统是利用Flex框架和ActionScript 3.0为主的,面向对象编程语言制作一个实现人机交互的展示系统,实现数字旅游、虚拟旅游、透过景点展示以及景点文化展示,达到对旅游景点更好的宣传和展示效果。

Design and implementation of web fast sharing platform of massive geological map

It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments,and hard to give full play to the potential application value of geological map. Along with the network,the development of communication and computer technology,especially with the Web2.0 technology arisen,provides opportunities to the web for sharing of geological maps. Web fast sharing platform of massive geological maps( WSPGM) is based on the Flex technology development,using B/S architecture,with map navigation,search,display,security and other functions of the software system. Through the map pretreatment and asynchronous communication the system can display any size of geological map,and through the range limits,rights management,sharing system and watermark logo to take effective security on geological map. On the basis of this system,with the Jilin University web sharing system of geological map,the system can greatly improve the efficiency of using geological map. for research.