In the dissertation , the author uses objective and subjective measurement respectively to compare among philips ' s 1st ( c ' s algorithm , philips ' s 2nd ic ' s algorithm and our own motion compensated algorithm . simulation shows our algorithm solves the problem of horizontal edge flicker in saa4991 , alleviates the problem of " tear " in saa4992 . the author also uses subjective measurement to compare among our edge - based motion adaptive de - interlacing algorithm , traditional intra - field interpolation algorithm and faroudja ' s dcdi algorithm . simulation shows our own edge - based algorithm can remove the sawtooth on the object ' s edge , and has basically reach the level of dcdi 论文从主观和客观两个角度对比分析了自有的运动补偿算法和飞利浦一代芯片saa4991 、二代芯片saa4992中的运动补偿算法的性能：自有算法对于图像的水平边有效抑制了saa4991存在的闪烁现象，减小了saa4992存在的拖尾问题；自有的边沿算法消除了传统算法在物体边沿处存在的锯齿，可以得到清晰平滑的边沿，基本达到了dcdi算法的水平。
On the basis of image segmentation , this thesis mainly discusses the algorithm of automatic target tracking in sequence images on the sea . firstly , in terms of the characteristics of image on the sea , such as weak contrast between target and background , borderline between sky and sea , spoondrift and so on , a method called barycenter tracking which is based on intra - frame information from the sequence images is proposed , in which the threshold method is the key algorithm 在图象分割算法研究的基础上,本文重点从两方面讨论了海上序列图象中运动目标的自动跟踪算法:首先,针对海上图象的特点,即背景与目标间的弱对比度、存在海天线、鱼鳞光和目标拖尾等,设计了以阈值分割为核心的基于帧内信息的形心跟踪方法。
Abstract : some technical problems concerning the development of end burning motors , such as low takeoff acceleration , long tail - off duration and interface debonding of the stress relief flap etc are analyzed and some appropriate measures are put forward . the measures have been proved to be suitable and valuable for improving the motor performance 文摘:就贴壁浇注的端面燃烧发动机容易产生的起动加速慢、工作拖尾时间长及尾端部人工脱粘层(盖层)粘接脱粘等技术问题进行了分析，提出了适用的解决办法，这些方法已被实践证明是有效的，对提高发动机性能非常重要。
The results given by the improved software are not both statistically and biologically different from manually specified results , and thus can be used as an effective alternative for the latter . it has a very high sensitivity in determining cells with a tail , meeting the needs of screening tests . it has both a high sensitivity and a high specificity in determining cells with 2 damage grade , indicating a potentially good laboratory index 结论彗星试验图像分析软件经改进后，分析准确性得到提高，程序鲁棒性增强，而且易用性改善，并增加了由操作者进行必要校正的功能;所得分析结果与人为指定的分析结果相比，并不同时存在统计学显著差异和生物学显著差异，可作为真实可靠的彗星数据分析系统应用;改进后的系统在拖尾细胞判定上具有很高灵敏度，可用于筛查试验项目;在2级及2级以上损伤细胞的判定上同时具有较高的灵敏度和特异度，是实验室研究中的优良指标。
As the dispersive influence can be easily described by a frequency transfer function , the feasibility of measuring the function with the g - s algorithm is researched numerically in the next part . from the results of simulation with fibers with different length and pulses with different width , it ’ s known that the convergence of the algorithm is related to the difference between the input and output pulse . then , the influence of attenuation and self phase modulation of fiber is discussed , and the influence of the delay phenomenon and fitted polynomial is also analyzed 通过对不同光纤长度和不同输入脉冲脉宽的计算,得到了g - s算法的收敛性与输入波形和输出波形之间的关系;在此基础上,通过对光纤损耗、自相位调制的模拟,分析了损耗和自相位调制对光纤传递函数测量的影响;本文还分析了波形测量中的拖尾现象和多项式拟合对测量的影响,进而,对利用g - s算法进行单模光纤传递函数测量的可行性进行了阐述。
The principle and characteristics of ofdm system are introduced first . then several key technologies of channel estimation and equalization for ofdm are discussed in detail , including pilot signal based channel estimation methods , cyclic prefix based channel estimation method , frequency domain adaptive filtering method and time domain equalization method for long channel impulse . the corresponding comparison and simulations are also provided 文中讨论了利用导频信号的信道估计方法，利用循环前缀进行信道估计的方法， ofdm信号均衡中自适应滤波技术，及信道冲击响应长于循环前缀时利用时域均衡减少解调器输入信号拖尾长度的方法，分析了这些方法的原理，并通过计算机仿真验证了这些方法的性能。
