Materials with strong two - photon absorption ( tpa ) are currently attracting considerable attention in the chemistry , photonics and biology communities because of their potential applications in optical power limiting , upconverted lasering , three - dimensional datastorage , nondestructiveimaging and photodynamic therapy 强双光子吸收材料由于在激光限幅、双光子上转换激射、三维信息存储、生物体三维成像、光动力学治癌等方面具有诱人的应用前景，成为材料化学、光子学、生物学等领域的关注热点。
The related theory and critical technology of ladar , the imaging mode and ranging methods of imaging ladar have been discussed in detail in this dissertation . then a research project of high - speed 3d - imaging ladar using a laser diode has been proposed , and the primary and critical problems of the theory and technology of the project have been discussed . a ladar prototype has been manufactured successfully , with which lots of systematic experiments have been carried out 论文系统研究了激光雷达的相关理论和关键技术,详细讨论了成像激光雷达的测距体制和成像方式,在此基础上提出了一种采用半导体激光器的高速三维成像激光雷达研究方案,全面分析了该方案的主要理论问题和关键技术问题,并成功研制出了实验室样机,利用样机进行了大量的系统实验。
The 30 questions , most of which were multiple - choice , were designed to assess the type of practice , responder ' s status , available facilities and 3d visualization tools , the impact of 3d visualization on the interpretation process , and communication with referring physicians , according to the researchers 这问卷包括30个问题，大部分是多项选择题，研究者们设计了这些问题用来评价实际应用的种类，应用者的身体状况，可利用的设备，还三维成像技术，三维成像在检查过程中的作用，还有和相关医生的交流。
Studied the cluster and background reduction algorithm and , proposed an enhanced adaptive step average method based on the amplitude of a - scan signal ; 2 . improved the gpr data acquisition and processing software , some utilities have been added such as position wheel control program , data format translation etc . ; 3 . implemented 3d targets imaging using mixed programming of matlab and visual c + + ; 4 本文的主要工作如下: 1 .研究了探地雷达回波信号杂波及背景去除算法,改进了一种基于a - scan信号强度的自适应滑动平均法; 2 .改进并完善了探地雷达数据采集处理软件,加入了定位轮控制数据采集、数据格式转换、目标距离测定等程序; 3 .研究了探地雷达目标成像算法,利用动态链接库技术实现了在脱离matlab环境下在visualc + +编写的程序中调用matlab程序对目标进行三维成像的功能; 4 .参加外场实验及项目验收。
