The conditions for long distance propagation and self - guiding are given . 3 . an optical amplification system for 10 ps krf laser with polarization multiplexing is developed and the energy of 140 ml is extracted 发展了一种适用于超短脉冲激光的光学偏振放大技术，并应用于10pskrf激光放大系统中，可在有限的激光输出口径内有效地提取激光的输出能量。
Besides this , conferencing systems , additional led displays , additional lcd desktop systems , audio amplification systems , digital recording , image processing systems , signal processing and conversion systems , and long distance control systems must all be integrated 除此以外，还有远程会议系统、 led辅助显示系统、桌面液晶辅助显示系统、音频扩声系统、数字录音系统、多画面图像处理系统、音视频信号处理切换系统、远程监控系统等组成。
The main contents are as follows : ( 1 ) by employing the direct method , the soliton periodic amplification system in optical fiber link with loss is considered , and the adiabatic solution ( slowly varying portion ) and first - order correction ( rapidly varying portion ) for a single soliton case are presented 本文的主要内容如下： ( 1 )利用直接扰动方法对周期放大系统进行了理论分析，给出孤子周期放大系统的绝热近似解和一级修正解的积分表达式，结果分析表明孤子在放大过程中一部分能量以色散波的形式流失，而这一色散波主要由孤子周期放大系统的一级修正解来刻画。
The amplification system was optimized so that the pcr with different primers can be carried out under the same condition . the pcr products were sequenced using sanger ' s terminator and fluorescent label techniques . sequences were analyzed and compared base on sequencing analysis3 . 4 and seq / ede software 方法根据mtdna控制区及其周围区域的序列，设计多对引物，探索优化扩增体系，使扩增条件能够同时满足多对引物的需要，用sanger末端终止法及荧光标记技术对样本进行dna测序， sequencinganalysis3 . 4和seq ede软件进行序列分析和比对。
Abstract : using the ray - tracing method , we demonstrate that a grating - telescope stretcher is the conjugation of a grating pair compressor . we present an analytical formula for calculating the phase dispersions of the grating - telescope stretcher . the computer simulation with the formula demonstrates that there exists an optimal material dispersion for an amplification system , with which we can achieve the largest dispersion - free bandwidth 文摘:用光线追迹法论证了光栅-球面镜系统与普通的光栅对系统是一对相位共轭元件，并提出了光栅-球面镜系统色散的解析计算公式，以及对一个典型的放大系统做了模拟.模拟结果表明，对于一个放大系统，存在一个最佳的材料色散，用它可以获得最大的无色散带宽
At last , in term of the property of wide band of fra , the interference between channels of multi - channel amplification system is discussed . in multi - channel system , the relations between signal - interference ratio and input signal wave power , between signal - interference ratio and the number of channel and between signal - interference ratio and gain of fra have be discussed . the way of restraining the interference is produced 最后结合喇曼放大器宽带宽的特性讨论了在多信道系统中光纤喇曼放大器的串扰问题，研究了在多信道系统情况下，系统中的信扰比与信号输入光功率、信道数以及放大器增益之间的关系，并提出了减小此串扰的方法。
All - purpose conference room av amplification systems must handle audio in the forms of voice , music , movie soundtracks , singing ( for live performances ) , etc . , therefore the proper locations to install speakers , the power of the speakers , the number of microphones and audio channels must all be given serious consideration 多功能厅的音频扩声系统由于需要同时满足人声（会议） 、音乐播放声（电影播放） 、歌唱声（文艺演出）等多种需求，所以在音箱的合理安装位置、功率大小、话筒的数量、音频处理方面需要着重考虑。
