ff and on 中文意思是什麼

ff and on 解釋
斷斷續續，不時地
  • ff : FF ＝functional food 保健食品。
  • and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
  • on : adv 1 〈接觸、覆蓋〉上去；開（opp off）。 turn on the light [radio water gas] 開電燈[收音機、自來...
  1. Foundation fieldbus based on high speed ethernet ( ff hse ) is the only kind of fieldbus adopted the technology of ethernet. my thesis focus on the analyse and realization of the hse session, and through it the combination of hse and fieldbus is described. in the first part of this thesis, the history, the status and the trend of the fieldbus technology are introduced and the architecture of the foundation field is discussed. then hse session is analysed carefully

    本文在分析ffhse總線協議通信會話層session的基礎上，針對ff現場總線基於以太網的數據傳輸，以及session為總線的用戶提供通信服務進行了研究與開發，並實現了總線設備的互操作性處理，從而實現了以太網技術和現場控制技術的融合。
  2. At present, the most of vtr which are used in watch - control occasion for speciality are short of a uniform control - check - alarm system, which brings on the discommodiousness of operation and the user can not know the time of occurring a fault, which reduces the reliability of the watch - control system. therefor, at first, i carefully analyze the servo theory of the vtr which had been produced by chmavc with k mechanism to find out the work rule of the control signal ; second, take out some right control signal ; then for dealing with the problem of vtr in use for watch - control, i choose some right components to design the uniform control system for many special vtr with protel software. it mainly includes the following functions : operation functions of all vtr ( for example : power, play, ff, rew, stop, rec, eject, fwd, rwd, sp, lp ) was controlled by line at the same time ; in, the process of recording, when the tape walks to the end or stops by itself, the system gives an alarm and shows the number of the wrong vtr ; in the process of recording, the system gives an alarm and shows the number of the wrong vtr when the video signal from vidicon is losed ; the system controls all vtr to record on the non - working time when there is something wrong in the guarding section ; the system controls the video from vtr to switch to right monitor

    目前，用在監控場合的業務用錄像機普遍缺乏一個統一的控制及檢測報警系統，這就導致了操作的不方便和出現了故障用戶不知道，降低了監控系統的可靠性，為此，我首先對華錄松下生產的k機芯的錄像機伺服原理進行仔細分析，找出各個伺服控制信號的控制變化規律；然後從中選出合適的控制信號；針對目前錄像機在實際監控使用過程中存在的問題，選用合適的元器件；運用protel繪圖軟體，設計了這個多臺業務用錄像機的統一控制系統，她主要包括以下功能：錄像機操作功能（如power play ff rew stop rec eject及正尋反尋帶速設定等）的統一線控控制功能；磁帶在記錄過程中，磁帶到頭和磁帶自己「偷停」的報警，並要能顯示出具體是哪一臺錄像機；在記錄狀態下，攝像頭輸入信號丟失報警，並要能顯示出具體是哪一臺錄像機；在休息或其他不需要記錄時，一旦警戒區有情況，則控制所有機器自動進入錄像狀態的功能；從錄像機輸出的監控圖像信號對監視器的切換功能。
  3. Based on cdna sequences of ( 3 - carotene ketolase ( cr / ff ) and p - carotene hydroxylase ( c / - fz ), a 1. 6 kb crtw genomic sequence with six introns, and a 3kb crtz genomic sequence with five introns were clone, respectively. all the exon - intron junctions conform closely to gu - ag consensus splicing rule

    本論文工作成功地克隆兩個關鍵酶基因的基因組序列，發現crtw和crtz分別包括6個和5個內含子序列，所有這11個內含子的剪切位點都符合gu - ag規律。
  4. On the basis of that, we have an empirical research on the possible factor which influencing stock returns of our companies listed in shenzhen stock markert from a micro aspect. our research uses multifactor model combined with cross - section regression and econometrics, test the ff three - factor model of security portfolios and industry portfolios

    實證研究採用多因素模型的理論框架，結合橫截面回歸方法和計量經濟學的檢驗手段，對深圳股票市場股票組合和行業組合的f / f的三因素模型進行了實證研究。
  5. The chapter 4 gives a survey on many published studies and examines the main points of their view, including the origin explanation, economic and welfare effects, payg - ff reform and the system under open or multi - sector economy

    第四章，綜述了對養老保險問題的理論研究和主要觀點，從養老保險的起源、社會經濟影響效應、制度轉軌到開放經濟及多部門經濟下養老保險制度改革選擇等對理論研究進行歸納。
  6. One is a combination of ion exchange chromatography on q sepharose ff, hydrophobic interaction chromatography on phenyl hp, gel filtration chromatography on sephadex 200 and higher resolution ion exchange chromatography on mono q. the other is a combination of ion exchange chromatography on q sepharose ff, two affinity chromatography on con a sepharose 4b and benzamidine sepharose 6bcl sequentially

    上清液中重組蝗蛇毒類激血酶的純化是通過設計的不同分離純化方法組合進行的，並對每一種組合進行了活力與純度及口收率的評價，結果表明兩種組合方式都具有一定的實用性和可操作性。
  7. Most artificial intelligent planning algorithms are based on planning graph or state space search. ff based on both planning graph and heuristic state space search and performed standout in the 2nd and 3rd international planning competition

    Ff規劃器將規劃圖和啟發式狀態空間搜索原理進行了很好的結合，在兩屆ipc （ internationalplanningcompetition ）中取得了優異的成績。
  8. The nonlinear properties of the type compound of chalcone have been studied using finite field ( ff ) / pm3 method. the influence of the molecular structures, the type of substituting group and its sites on organic conjugated molecular electronic and nonlinear properties have also been studied for different substituting group and its sites. the results proved that the substiuting group noucd improve obviously the nonlinear properties of the system

    利用有限場ff pm3方法討論了查爾酮類化合物的非線性光學性質，針對不同取代基和取代位置系統分析了分子結構、取代基的類型、取代位置對共軛有機分子電子性質及非線性光學性質的影響結果表明，取代基的引入可明顯改善體系的非線性光學性質
  9. Spectrophotometric study on the interaction between xylene cyanol ff and proteins

    與蛋白質相互作用的分光光度研究
  10. As the third section is related with foundation fieldbus, the characteristics, architecture and function block of it is expatiated in this section. in the third section, i discuss the disadvantages of using wire media as physical layer media in traditional fieldbus on the basis of the first two section, and present a solution of substituting wireless bluetooth ? for wire media. in this solution the bluetooth ? gateway is presented by integrating bluetooth ? and fieldbus, the data collected by bluetooth ? sensor is transported to ff hse fieldbus by bluetooth ? gateway, and the control logic of ff hse fieldbus is realized by the same bluetooth ? gateway

    在這種有線介質替代解決方案中，將藍牙技術與現場總線技術相結合提出了藍牙網關的概念，現場藍牙傳感器採集的現場數據通過藍牙網關應用傳輸到ffhse現場總線上，同時ffhse現場總線上的控制邏輯也可以通過藍牙網關來實現，從而實現了無線藍牙網路與有線ffhse現場總線的互連，同時在該部分中還對藍牙網關應用的設計和實現進行了闡述。
  11. In order to provide the empirical testimony, we imitate ff ( 1, 993 ) three factors model to establish a model contained idiosyncratic risk factor, and use the shanghai a market data to carry on the examination

    為提供實證方面的依據，本文仿照ff （ 1993 ）的三因素模型建立了包含非系統性風險因子的實證模型，並採用上海a股市場數據對其進行檢驗。
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