The author mainly anticipates the task including the simulation of eye fundus imaging and image mosaic . on the base of the dr principle and ophthalmic phototropism study , the author analyze and contrast new fundus camera system with traditional fundus camera . the author will establish the eyeball model with 3ds max technology , imitate the simple eyeball dioptre system and simulate the narrow - angle imaging to ensure the rationality and authenticity of fundus image , which solves the object origin of later image process , then fast mosaics the nine piece of fundus images with the help of the image registration theory and acquire a piece of wide - view fundus image containing more information , thereby provides doctor with enough diagnostic detail , which solves the problem of narrow view 作者在熟悉糖尿病性视网膜病变原理和眼科屈光学的基础上,进一步研究分析了新型免散瞳眼底照相系统和传统眼底照相机原理和区别,拟采用3dsmax建立三维眼球模型,仿真眼球屈光系统,模拟眼底照相系统的小角度拍摄,使获取的眼底图像合理真实,解决后期系统图像分析处理的对象来源问题;然后运用医学图像配准理论对仿真获取到的九幅小角度眼底图像进行快速拼接,拼成一幅大角度的眼底图像,解决小瞳孔拍摄图像视角太小的问题;最后通过对眼底图像配准算法在相似性测度和搜索算法的比较,找到一种适合眼底照相系统的眼底图像拼接的快速算法。
The transmission characteristics of the inverted telescope , and the influence of beam quality , beam parameter and light system parameter are analyzed with lens beam transmission theory and definition of the beam quality factor m ^ 2 , and a rational explanation of the active focal depth is obtained 摘要利用透镜光束传输规律和光束质量因子平方公尺的定义，阐述倒置望远镜导光系统在超重超大工件高功率激光加工中的传输特性，以及光束质量、光束参数、导光系统参数在加工范围内对稳定加工质量的影响，并对有效焦深给出一个更合理的解释。
Then we introduce the character of the atmosphere channel , which we emphasized on the atmosphere scatter , absorption and scintillation ' s effect on the laser beam . in chapter , we explain why we used cassegrain telescope to collect the optical signal at first , then the lightsource , detector , front amplifier used in optical communication has been compared to that of fiber communication , the noise including shot noise , thermal noise and background light noise has been explained here for analysis the snr and ber in the next section 在第三章介绍无线光接入系统的光收发单元，采用多孔径卡塞格伦式的收发天线对消除减小大气湍流影响有较大作用，针对大气信道的特点无线光系统收发单元在光源、光探测器、前置放大电路上存在许多有别于光纤通信的技术，同时还阐述了光接收机包括背景噪声的噪声机制和接收灵敏度、误码率等指标，最后给出了一个整个传送链路的功率预算。
Nowadays , the reported proteases in thykaloids include the energy - enzyme and non - energy - enzyme . they are almost all involved in the processing and degradation of proteins in lumen or membrane of thykaloid [ 12 - 18 ] . in our lab , some proteases associated with photosystem ii of spinach have been discovered in years 我们实验室多年来致力于光系统结合蛋白酶的分离纯化与性质研究工作，已经取得了一定的成绩，分离得到了几种光系统结合的蛋白酶，这些蛋白酶的性质有着较大的差异，而且也不同于国内外已经报道过的光系统结合蛋白酶。
It could cleave the 18 kd peptide of psii and produce smaller peptides [ 5 ] . in order to detect the proteases in the nacl extract of psii particles , the sds - gelatin - page was applied in our experience , to identify and characterize proteases in the 1 mol / l nacl extract of spinach psii particles 为了进一步研究光系统中的各种蛋白酶，我们采用分离胶中加入0二5明胶作为底物的sds page ，对光系统颗粒及其lmol几naci抽提液中存在的蛋白酶进行了：分离、活性检测和性质分析。
In this paper , we reviewed the sites of damage under chilling temperature , such as effects of low temperature on membrane , two photosystems and some enzymes in calvin cycle , the chilling - sensitive components that exist in plants in vivo and the way of improving the ability of defending photoinhibition under low temperature 本文论述了低温对植物伤害的原初反应，例如低温对膜的伤害、低温对两个光系统和卡尔文循环中某些酶类的影响，并讨论了植物体内的冷敏感组分以及提高植物防御低温光抑制能力的途径。
