例句與用法

1. For the sake of making user randomly communicate between gsm900 and dcs1800 networks with a single handset , this thesis devoted to design and realize a rf ( radio frequency ) subsystem for gsm900 / dcs1800 dual band handset according to gsm 05 . 05 protocol provided by etsi , which the structure of single board can realize gsm900 / dcs1800 dual band of the handset
   為了使用戶可用一部手機(jī)在gsm900 dcs1800兩個(gè)移動(dòng)通信網(wǎng)上自動(dòng)漫游通話，本論文根據(jù)歐洲電信標(biāo)準(zhǔn)學(xué)會(huì)( etsi )提出的gsm05 . 05協(xié)議，設(shè)計(jì)實(shí)現(xiàn)gsm900 dcs1800雙頻段手機(jī)中射頻子系統(tǒng)。它單片的實(shí)現(xiàn)了手機(jī)的雙頻段gsm900 dcs1800 ，而且隨時(shí)可以根據(jù)網(wǎng)絡(luò)的需要，實(shí)現(xiàn)無縫(不斷線)自動(dòng)切換。
2. With the development of social economy and science technology , rf ( radio frequency ) card technology is more broadly applied by all kinds of trades , specially such as mass transit , wireless communication identify finance trade and safety - defend etc we use usually magnetic card or touch ic ( intelligent card ) in the past , but the shortage is that the card is read - write low efficiency frictional waste and short life , so that it ca n ' t guarantee the reliability of system for long term running
   隨著社會(huì)經(jīng)濟(jì)和科技的發(fā)展，射頻卡技術(shù)越來越廣泛地應(yīng)用于各種行業(yè)，特別是公共交通、無線通信、身份識(shí)別、金融交易和安全防衛(wèi)等行業(yè)。過去，智能卡應(yīng)用領(lǐng)域常采用磁卡或接觸式ic卡，但由于讀寫速度慢，易磨損，使用壽命短，無法保證系統(tǒng)長(zhǎng)期運(yùn)行的可靠性和方便性。
3. Therefore , the diagnostics of electrical and optical characteristic of plasma form the basic respects of plasma diagnostics . the author reports in detail in the dissertation the experimental investigation on the phenomena of some common discharge systems at typical operation status such as dc glow ; rf ( radio frequency ) glow and microwave ecr ( electron cyclotron resonance ) discharge
   創(chuàng)新之處： （ 1 ）提出了雙原子分子轉(zhuǎn)動(dòng)分辨發(fā)射光譜的擬合方法，并利用擬合方法進(jìn)行了氮?dú)庵绷鬏x光放電產(chǎn)生的第一負(fù)帶轉(zhuǎn)動(dòng)分辨光譜和磁控濺射沉積cnx膜過程中cn基團(tuán)的振動(dòng)帶的轉(zhuǎn)動(dòng)線型擬合，獲得了相應(yīng)的轉(zhuǎn)動(dòng)溫度。
4. The article puts forward a new digital wireless transmission system which is realized by combining a mcu as its control center with a rf ( radio frequency ) module . compared with using bluetooth technology , this resolution can guarantee the quality of the received signal even in an unstable environment , by the way the cost is quite low
   本文設(shè)計(jì)一種以ti公司msp430系列的單片機(jī)為控制核心結(jié)合射頻模塊實(shí)現(xiàn)傳感信號(hào)的無線數(shù)字傳輸系統(tǒng)。與傳統(tǒng)采用藍(lán)牙技術(shù)的方法相比,此方法在環(huán)境不穩(wěn)定時(shí),仍能保證良好的數(shù)據(jù)傳輸質(zhì)量,且所需成本小。