x
uploads/sending set.jpg

sending set 發射機。

sending station

As a new generation of micro - satellite based on micro - electro - mechanic system ( mems ) , pico - satellite , in virtue of its low weight ( 1kg or lighter ) , is unburdened from high - cost large sending sets . thereby research of pico - satellite can be progressed with much lower cost without huge experimental establishments and wide - span workshops so that institutions , mostly universities , became the main researching force . besides reduced expenses , another advantage of research in university laboratories is the potential high privacy 皮型衛星是新一代以mems技術為核心的微小衛星,由于質量很輕( 1kg以下) ,可不使用高成本的大型運載工具進行發射,其成本可比一般衛星大大降低;此外,皮型衛星的研制將不再需要大型的實驗設施和高跨度廠房,因此目前大學等研究機構是研制皮型衛星的主要科研力量,在大學的實驗室里研制皮型衛星,可以降低它們的研制費用。

The text uses the method of ray tracing that is based on improved traditional mirror image principle of the radio wave forecast and two ray propagation model , which can be used in any complex propagation environment and found any propagation path from the sending set to receiving machine without redundancy computer 本文是基于無線電波預測中傳統的鏡像原理與雙射線傳播模型的結合而提出的改進了的射線跟蹤算法,它能用于任何復雜的傳播環境中,能找到從發射機到接收機之間的所有傳播路徑而無須冗余的計算。

After special lectures on radio or television , these students , too , have to send set work for correction by correspondence 學生在收音機或電視上收聽了專門的授課節目之后,也必須把指定的作業寄出,通過函授批改訂正。