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- PPM(Pulse Position Modulation), as one of key technologies in the atmosphere laser communication, arouses more and more attention by the virtue of high power efficiency and strong resistance to interference. 光脉冲位置调制(PPM)具有能量传输效率高(每光子传输的信息量),抗干扰能力强等优点,是大气激光通信中的一项关键技术,因此越来越受到人们的重视。
- atmosphere laser alignment system 大气激光准直系统
- longitudinally-excited atmosphere laser 纵向激励大气压激光器
- transverse-excited atmosphere laser 横向激发大气压激光器
- longitudinally excited atmosphere laser 纵向激励大气压激光器
- The quantum noise is a basic noise in the atmospheric laser communication system, which restricts the effective distance of communication. 摘要量子噪声是通信系统中的基本噪声,它的存在制约了通信的有效距离。
- The meeting is gone on in very friendly atmosphere. 会议在非常友好的气氛中进行。
- That film creates an atmosphere of menace. 那部影片营造出吓人的气氛。
- Danger lurked in the atmosphere. 氛围中隐藏着危险。
- Keywords Vacuum Controlled atmosphere Laser soldering Fluxless; 真空;控制气氛;激光软钎焊;无钎剂;
- The plants drink in moisture from the atmosphere. 植物从大气中吸取水分。
- The atmosphere over dinner was warm and friendly. 用餐时洋溢著热情友好的气氛。
- The atmosphere was reminiscent of spy movies. 那气氛使人联想起间谍电影。
- The atmosphere is really festive and friendly. 气氛真是欢乐而友好。
- The atmosphere of the city is very much polluted. 那个城市的空气受到严重污染。
- The talk was conducted in a cordial atmosphere. 会谈是在热情友好的气氛中进行的。
- The ancient palace has a lot of atmosphere. 这座古老的宫殿很有魅力。
- The peoples are in a festal atmosphere. 各族人民都沉浸在节日的气氛之中。
- Petrol fumes from car engines poison the atmosphere. 汽车引擎排放的汽油烟气毒化着大气。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。