After special lectures on radio or television , these students , too , have to send set work for correction by correspondence 學(xué)生在收音機或電視上收聽了專門的授課節(jié)目之后,也必須把指定的作業(yè)寄出,通過函授批改訂正。
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(yù)測中傳統(tǒng)的鏡像原理與雙射線傳播模型的結(jié)合而提出的改進了的射線跟蹤算法,它能用于任何復(fù)雜的傳播環(huán)境中,能找到從發(fā)射機到接收機之間的所有傳播路徑而無須冗余的計算。
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(wèi)星是新一代以mems技術(shù)為核心的微小衛(wèi)星,由于質(zhì)量很輕( 1kg以下) ,可不使用高成本的大型運載工具進行發(fā)射,其成本可比一般衛(wèi)星大大降低;此外,皮型衛(wèi)星的研制將不再需要大型的實驗設(shè)施和高跨度廠房,因此目前大學(xué)等研究機構(gòu)是研制皮型衛(wèi)星的主要科研力量,在大學(xué)的實驗室里研制皮型衛(wèi)星,可以降低它們的研制費用。
sending set meaning:[Electronics] 1. See RADIO TRANSMITTER. 2. An equipment for transmitting electromagnetic waves. Also see TRANSMITTER, 1. sensation level The level of sound that produces a tingling or noticeable sen...