d-a 中文意思是什麼

d-a 解釋

  • d :
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  1. Tesh, r. b. and d. a. shroyer 1980 the mechanism of arbovirus transovarial transmission in mosquitoes : san angelo virus in aedes albopictus. am. j. trop. mod. hyg., 29 ( 6 ) : 1 394 1 404

    郭曉霞，趙彤言，董言德，等. 2003 .白紋伊蚊經滯育卵傳遞登革型病毒的實驗研究.中國媒介生物學及控制雜志， 14 （ 1 ） : 9 11
  2. Design of novel inverter - weightier - capacitance network of d a

    權電容網路的設計
  3. Modest loneliness may motivate one ' s activities and thus play a positive role, d ) a questionnaire of the loneliness structure of college students in henan province has been developed in this study and it proves to have high reliability and validity by means of exploratory factor analysis and confirmative factor analysis. implications for future research are discussed

    這與西方學者僅將大學生作為成人被試來研究成人孤獨感（不考慮發展）的視角不同，可以說在成人孤獨感的研究中吸收了西方學者關于兒童青少年孤獨感的研究優點（關注發展問題） ，而這更符合我國大學生發展的實際情況。
  4. The control system included the following units : video decode unit, data format conversion unit, fpga controller, cache unit and d / a monitor. the above self - design control unit plus row and column power supply units make the whole fed driving system, thus drove the 25 inch sample and realized color video display. the 25 inch vga sample thus fabricated could display video images, and obtained its brightness 400cd / m2, contrast ratio 1000 : 1, 256 circuit gray scale

    本文介紹了fed驅動系統的工作原理，重點論述了基於fpga的vga級彩色fed新型驅動控制系統的研製，這種新型fed驅動控制系統主要包括視頻解碼電路、數據格式轉換電路、 fpga控制電路、數據緩存電路和d / a監控電路，配合后級列灰度調制單元和行掃描單元，組成完整的fed驅動系統，可以驅動25英寸vga級fed顯示屏，實現彩色視頻顯示，樣機亮度達400cd / m2 、對比度為1000 : 1 ，灰度等級為256級。
  5. A d and d a conversion

    數模與模數轉換
  6. In the development process, pcl - 818l card is adopted by the system as the interfaces of a / d and d / a

    在系統的開發過程中，採用的是p卜818l數據採集卡作為d 、八接。
  7. So digitalizing analog signal is the trend of information technology, in which a / d and d / a plays an important role

    所以模擬信號數字化是信息技術的發展趨勢，而a d和d a轉換器在其中扮演著重要角色。
  8. 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a d 、 d a轉換的具體電路和利用該數據採集卡實現a d 、 d a轉換的具體手段進行了闡述。
  9. 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 ，數字上/下變頻器，高速數字信號處理器等。
  10. 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

    軟體無線電的關鍵思想在於兩點:一是將a / d ， d / a盡量靠近天線，二是用軟體實現盡可能多的無線電功能。
  11. 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

    對控制系統進行了軟體設計。軟體包括控制系統pid演算法的dsp實現、系統初始化以及a d 、 d a轉換程序。
  12. 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

    在結合具體硬體環境和系統需求明確了系統的a d 、 d a等環節的實現手段以後，文章對系統控製程序所採用的具體的語言環境和程序結構進行了說明。
  13. 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

    軟體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、模塊化的通用硬體平臺上盡可能多的用軟體來實現。
  14. Daw so v l, daw son t m, batley d a, et al. mechanism of nitric oxide mediated neurotoxity in primarty brain cultures [ j ]. j neurosic, 1993, 13 ( 6 ) ： 2651

    陳琳，高署，胡成穆，等.一氧化氮及一氧化氮合酶在腦缺血損傷中的作用[ j ] .安徽醫藥， 2004 ， 2 （ 8 ） ： 5
  15. Based pc, d / a convertor and 2 - dimension galvanometer scanning system, laser marking control system is built. coordinate data scanned and kept in the computer are transformed into the analog signals by d / a converter, then control the galvanometer to deflexion

    基於pc 、 d / a轉換器和二維振鏡掃描系統搭建激光打標機控制系統，將存儲在主控計算機的掃描坐標點的坐標數據通過d / a轉換，將數字信號轉換成模擬信號來控制振鏡偏轉。
  16. Rigging and fitting my mast and sails ; for i finish d them very compleat, making a small stay, and a sail, or foresail to it, to assist, if we should turn to windward ; and which was more than all, i fix d a rudder to the stern of her, to steer with ; and though i was but a bungling shipwright, yet as i knew the usefulness, and even necessity of such a thing, i apply d my self with so much pains to do it, that at last i brought it to pass ; though considering the many dull contrivances i had for it that sail d, i think it cost me almost as much labour as making the boat

    他當然是個劃船的好手，可是對使用帆和舵卻一竅不通。他見我用手掌舵，駕著小舟在海上往來自如，又見那船帆隨著船行方向的變化，一會兒這邊灌滿了風，一會兒那邊灌滿了風，不禁大為驚訝-簡直驚訝得有點發呆了。可是，不久我就教會了他使用舵和帆，很快他就能熟練駕駛，成了一個出色的水手。
  17. However having a fresh gale, i stretch d a - cross this eddy slanting north - west, and in about an hour came within about a mile of the shore, where it being smooth water, i soon got to land

    由於風還大，我就從斜里穿過這股迴流，向西北插過去。一小時之後，離島只有一海里了，且這一帶海面平靜，所以不久我便上了岸。
  18. When we had fir d our second volley of our fusees, we thought they stopp d a little, and hop d they would have gone off ; but it was but a moment ; for others came forward again ; so we fir d two volleys of our pistols, and i believe in these four firings, we had kill d seventeen or eighteen of them, and lam d twice as many ; yet they came on again

    於是我們馬上沖到那二十多隻受傷狼跟前它們已跑不動了，只是在地上掙扎。我們拿起刀亂砍亂殺。正如我們所預期的那樣，這辦法果然很奏效，因為那些逃跑的狼聽到它們同伴的慘叫聲，知道事情不妙，就嚇得跑遠了，而且再也沒有回來。
  19. The f. d. a. says it is moving closer to permitting the sale of milk and meat from animals that are genetic copies of other animals

    食品藥品管理局說不久就會允許在市場上銷售克隆牛奶和肉類製品。
  20. Compared with primary second sampling a / d converter, it realizes digital feedback by digital circuit and does n ' t adopt high accuracy d / a converter with complex technology and high price. it has many excellent qualities, such as high - integration, high - accuracy, widely used, low - price. it can be widely used in test and measure system, scientific instrument, iatric instrument, automatic test system etc. so popularizing this new type a / d converter has very significant meaning

    與原有的兩次采樣a / d轉換器相比，用數字電路實現數字反饋可不用技術復雜、價格昂貴的高準確度d / a轉換器，具有集成度高、準確度高、適用性強、價格低等優點，可廣泛應用於測量測試系統、科學儀器、醫療儀器、稱重儀器、自動測試系統等。
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