d D flat 【音樂】降 D 調(diào)。 D major [minor] 【音樂】 D 大調(diào)[小調(diào)]。 D sharp 【音樂】升 D 調(diào)。 a D student 劣等生。 a D slide valve D 形滑閥。 CD = 400. DC = 600.
d and dd and d, d & d= 〔美俚〕1.drunk and disorderly (警察用語)酒醉后擾亂治安的。2.deaf and dumb 又聾又啞的;〔比喻〕裝聾作啞的(尤指因為怕報復(fù)而對壞事不加告發(fā))。; 儀器公司
In the development process , pcl - 818l card is adopted by the system as the interfaces of a / d and d / a 在系統(tǒng)的開發(fā)過程中,采用的是p卜818l數(shù)據(jù)采集卡作為d 、八接。
The influence of the parameters such as d and d ( illm thickness ) on laser induced voltage had been discussed 根據(jù)該公式,對影響激光感生電壓的一些參量如、 d 、薄膜的厚度d等進(jìn)行了討論。
So digitalizing analog signal is the trend of information technology , in which a / d and d / a plays an important role 所以模擬信號數(shù)字化是信息技術(shù)的發(fā)展趨勢,而a d和d a轉(zhuǎn)換器在其中扮演著重要角色。
Then , the article introduces the circuits of the a / d and d / a , and the conversion method of the a / d and d / a 文章還就實現(xiàn)a d 、 d a轉(zhuǎn)換的具體電路和利用該數(shù)據(jù)采集卡實現(xiàn)a d 、 d a轉(zhuǎn)換的具體手段進(jìn)行了闡述。
The software radio consists of several parts as follow : analog front end , broadband a / d and d / a , digital upper / down converter , high - speed signal processor and so on 它由以下幾個部分組成:模擬前端,寬帶a / d和d / a ,數(shù)字上/下變頻器,高速數(shù)字信號處理器等。
The main point of the conception about software radio is as follows : first , making the a / d and d / a close to the antenna ; secondly , accomplishing as much as function by software 軟件無線電的關(guān)鍵思想在于兩點(diǎn):一是將a / d , d / a盡量靠近天線,二是用軟件實現(xiàn)盡可能多的無線電功能。
The package of software contains the pid algorithm realizing for the dsp control system , the program for system initialization as well as the program for a / d and d / a transforming 對控制系統(tǒng)進(jìn)行了軟件設(shè)計。軟件包括控制系統(tǒng)pid算法的dsp實現(xiàn)、系統(tǒng)初始化以及a d 、 d a轉(zhuǎn)換程序。
After the methods of a / d and d / a were expressed according to the hardware and needs of the system , the article explains the language environment and the program structure 在結(jié)合具體硬件環(huán)境和系統(tǒng)需求明確了系統(tǒng)的a d 、 d a等環(huán)節(jié)的實現(xiàn)手段以后,文章對系統(tǒng)控制程序所采用的具體的語言環(huán)境和程序結(jié)構(gòu)進(jìn)行了說明。
The basis idea of software radio ( srd ) is to place the a / d and d / a close up the antenna as possible as and use software to realize all the function of any radio based on an opening and blocking currency hardware platform 軟件無線電的基本思想是將寬帶a / d及d / a盡可能靠近天線,將無線電臺的各種功能在一個開放性、模塊化的通用硬件平臺上盡可能多的用軟件來實現(xiàn)。