back current 中文意思是什麼

back current 解釋
反向電流逆流
  • back : n 1 背，背部；背脊；背面，反面；背後，後部，後面，裏面。2 （指）甲；（刀）背；（手）背；（書）背...
  • current : adj. 1. 通用的，流行的。2. 現在的，現時的，當時的。3. 流暢的；草寫的。n. 1. 水流；氣流；電流。2. 思潮，潮流；趨勢，傾向。3. 進行，過程。
  1. Going back in time, knowledge was thought to develop differently : impressions to resemblance / contiguity / cause to reason. in our current definition of knowledge what has happened to experience, and wisdom

    回想從前，對知識的獲取認識是不同的：知識是對相似性/聯系性/事物的緣由的認識。我們當前定義的知識，經驗和智慧發生了怎樣的變化？
  2. Are used to dynamically display the current counter value and create a form action to refer back to the calling portlet

    用於動態顯示計數器值，創建一個表單動作，以便向後引用正在調用的portlet 。
  3. But the portuguese coach used their current selection problems to hit back at the critics who have lambasted their defensive woes in recent weeks

    但是葡萄牙主帥用自己靈活的排兵布陣痛擊了那些批評他們防守的聲音。
  4. I propose to raise the duty - free quantity of alcoholic beverages that hong kong residents may bring back from the current 750 millilitres of still wine to one litre and to apply this to all liquors

    香港居民入境時可享的酒類免稅額，會由現時的750毫升無氣葡萄酒，調高至一公升，而這免稅額亦會適用於所有酒類飲品。
  5. The three - phase distribution flow method on combining the back / forward sweep algorithm and circuit calculation is studied. as a result, the transform model from the apparent power of low voltage side to the current of high voltage side is built

    研究了電路計算與配電網潮流計算的前推回代法相結合的（基於電路分析的）三相潮流計算方法，在該演算法的基礎上建立了配變低壓側的功率到高壓側的電流的轉換模型。
  6. Neural network control is an important mode of intelligent control, and it is widely used in branches of control science, first, the architecture and the learning rule ( error back propagation algorithm ) of multiplayered neural network which is widely used in control system are presentedo especially, the paper refers to the architecture of diagonal recurrent neural network and its learning algorithm - - - - - recurrent prediction error algorithm because of its faster convergence with low computing costo next, before introducing the neural network control to the double close loop dc driver system, the controllers of current and velocity loop are designed using engineering design approach after analysis of the system, simulation models of the system are created

    神經網路控制是智能控制的重要方式之一，它廣泛應用於自動控制學科各個領域。本文首先敘述了控制系統中常用的多層前饋網路結構及演算法（ bp演算法） ，特別提及了能夠較好描述系統動態性能的對角遞歸神經網路和在用遞推預報誤差演算法訓練drnn時取得了較快的收斂速度。其次，應用工程方法分析設計了tf - 1350糖分離機的電流、轉速雙閉環直流調速系統的控制器，作為引入神經網路控制的設計基礎，並建立了系統的模擬模型。
  7. Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles

    對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較，模擬研究和實驗結果表明，當反電動勢的平頂寬度小於107電角時，採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上，更有效地抑制電磁轉矩脈動。
  8. For the bldcm which has a general crest width of the back - emf waveform, two kinds of torque ripple conditions when drived by sine - wave current as well as by square - wave current are deduced based on the mathematical models. in addition, a comparison is carried out between these two conditions, which indicates that sinusoidal current driving is more favorable to minimizing the torque ripple when the crest width of the back - emf waveform is less than a certain value

    闡述了抑制齒槽轉矩措施對反電動勢波形的影響，利用無刷直流電機的數學模型推導並比較了任意平頂寬度梯形波反電動勢在正弦波和矩形波兩種電流驅動下的電磁轉矩脈動情況，得出在梯形波平頂寬度減小到一定數值后採用正弦電流驅動更有利於減小電磁轉矩脈動。
  9. Voltage segment network constituted by electron switch of bta and controlled by single chip microcomputer constitutes a new fast electronic regulator. for bta cross zero touch off, sine wave which is exported is integrity. a new way to generate stable ac current is found with feed back control system by single chip microcomputer. so a new high power ac current regulator is developed

    採用單片機控制雙向可控硅作為電子開關所組成的電壓分節網路，組成新穎快速的電子調壓器；由於雙向可控硅過零觸發，所以其輸出是不失真的完整正弦波；再用單片機組成反饋控制系統，從而找到了交流穩流的新方法，研製出一個大功率交流穩流電源
  10. Abstract : voltage segment network constituted by electron switch of bta and controlled by single chip microcomputer constitutes a new fast electronic regulator. for bta cross zero touch off, sine wave which is exported is integrity. a new way to generate stable ac current is found with feed back control system by single chip microcomputer. so a new high power ac current regulator is developed

    文摘:採用單片機控制雙向可控硅作為電子開關所組成的電壓分節網路，組成新穎快速的電子調壓器；由於雙向可控硅過零觸發，所以其輸出是不失真的完整正弦波；再用單片機組成反饋控制系統，從而找到了交流穩流的新方法，研製出一個大功率交流穩流電源
  11. This thesis is divided into four chapters : chapter one, introduction, including study the back - ground, the current situation of research and three parts of train of thought of writing of this text ; chapter two, domestic and international national defense reserve force trains the overview, build the summary in including the reserve force of national defense, foreign national defense reserve force trains the state, domestic national defense reserve force trains the state and improves the necessity of the reserve force quality of the national defense ; chapter three, the important position in the reserve force cultivation of the high - quality national defense of local university, including the important position in the reserve force cultivation of the national defense of local university, historical stage that the local university trained the reserve force of the national defense, the form of university ' s defense education and four parts of advantage in training the reserve force of the high - quality national def ense of local university of the present stage ; chapter four, the exploration and innovation of the

    它注重的是國防建設的高科技性，國防人才的高素質性，國防戰略的綜合性。本論文分為五章：第一章，緒論，包括研究背景，研究現狀和本文寫作思路三個部分；第二章，國內外國防后備力量培養概況，包括國防后備力量建設概述，國外國防后備力量培養狀況，國內國防后備力量培養狀況和提高國防后備力量素質的必要性；第三章，普通高校在高素質國防后備力量培養中的重要地位和歷史沿革；第四章，高校國防教育體制的探索與革新，包括現階段高校國防教育的形式，高校國防教育的不足，完善高校國防教育的設想三個部分；第五章為總結，對全文進行總的概括。
  12. Ceramic welding backups are used for one - sided welding of steel and aluminum alloy with any thickness, instead of two sided welding in shipbuilding industry, marine industry, and heavy mechanical industry. the products are stuitable for the most kinds of welding process such as gmaw, saw, fcaw and seg even with high electric current to produce a satisfactory back bead formation

    陶瓷焊接墊是用作鋼鐵或鋁合金單面焊雙面成型的支撐件，可替代效率低下的雙面焊工藝，被廣泛應用於造船，橋梁和重型機械等工業領域的各種焊接（ gmaw ， saw ， fcaw和seg ）甚至高電流場合
  13. On the one hand, it " s imperative to change the current structure, to hand to market the products and services what market can provide efficiently to change the current distribution situation and increase the fiscal expenditure that market can " t do actively for the sake of good solution to " beyond its duty " and " not yet finish its duty ". on the other hand, fiscal expenditure should embody its function to promote a country ' s development and it ' s necessary to increase constructional expenditure such as fiscal investment in agriculture, back bone enterprises of state - owned economy, pillar industries, guiding industries, basic industries and so on to ensure the rapid and all - round development of our country

    即一方面要改變現有的財政支出結構，按照公共產品理論把市場能夠有效提供的產品和服務交給市場以改變國家財政包攬過多的分配局面，加大市場不能有效供給產業的財政支出，解決好財政「缺位」和「越位」的問題；另一方面，要根據中國的國情，財政支出應該體現財政的促進發展的職能，增加經濟建設支出，特別是農業、國有經濟的骨幹企業、國家支柱產業、先導產業、基礎產業等的財政投資，確保國家快速、全面發展。
  14. Being a widely utilized public ip platform, it is susceptible to security attacks of all nature, as outlined in the following areas : the open nature of the ip internet systems - increase of foreign attacks, for example dos / ddos attacks ; the current weakness of the existing operating system ' s internet protocol ; mainframe, and lack of an evaluation standard for back office systems, the inevitable problem of illegal internal access, the lack of guidelines for record keeping and post attack documentation processes, hi addition, still in existence, are managerial problems including the lack of securit y knowledge amongst the workforce and the inexistence of a complete set of security guidelines. to guarantee china telecom ' s 163 / 169 system ' s reliable functions, to protect the user ' s interests, at the same time, insuring quality service, it is necessary to adapt p2dr model as a solution to the current security issues. supported by the modern secure theory and made the secure implementation abundant project practices, this paper gives the general secure design for the chongqing public ip network using p2dr secure model

    中國電信建設的公眾ip網對我國internet的發展起著決定性作用，重慶電信163 / 169網際網路是國家骨幹網在本地的延伸，擁有7個核心節點（採用cisco12012 、 2 * 2 . 5gdpt環） ，三十八個匯接節點，能提供寬帶，窄帶多種接入方式的公眾ip網，現擁有近20萬用戶，佔全市網際網路用戶四分之三以上，作為這樣一個擁有眾多用戶，開放的ip平臺，會受到各種各樣的安全威脅，主要表現在ip網路的開放性，來自外部的攻擊增多，如dos / ddos攻擊；所使用的操作系統運行的網路協議自身的脆弱性；主機、網路設備的配置是否缺乏評估手段；不可避免的內部非法訪問；缺乏必要的攻擊審計作為犯罪取證，出此之外，還有管理上的一些問題，如人員安全意識不強，安全制度不夠健全等多方面原因。
  15. The feed - back provided by the reflected electron beams reduce the start - up current and the start - up time in a vircator, while the existence of klystron cavity improves the extracting efficiency, hence the radial reflex klystron oscillator with virtual cathode combines the advantages of both devices, becomes a compact, efficient set

    利用虛陰極反射電子束對調制腔的正反饋，可以減小起振電流和起振時間，而且提高了微波產生效率。它是一種結構簡單，緊湊，不需要引導磁場的器件。
  16. 15six - person used desks, 10 one - person used desks, 110 chairs, 2 newspaper shelves, 7 shelves for back number, 4 shelves for current periodicals, 2 air conditioners, one information, one photocopier, 14 sets of computers ( including those for teaching ), one printer, one scanner and one radio recorder

    閱覽桌十五張（六人用） 、閱覽桌十張（一人用） 、座椅一百一十把，報架二座，過期期刊架七座，現期期刊架四座，冷氣二部，服務臺一座，影印機一臺，教學用電腦十四部，印表機一部，掃瞄機一部以及收錄音機一臺。
  17. Gpib and rs - 232 control of current, voltage and resistance and read - back of current, voltage, and power

    Gpib和rs - 232潮流控制電壓和潮流電壓，和力量抵抗和讀取
  18. Equipment for water supply service - test method of prevention from back current

    供水服務設備.防迴流的測試方法
  19. There was, it is true, underneath, a back current of sympathy through which a woman of the world might have conquered him

    在這股浪潮裏面，其實還是有一股同情的暗流，一個老於世故的女人本可以利用它來征服他的。
  20. The way to shield the back current of foilless diode is analyzed by karat program. the surface flashover is raised from 300kv to 400kv when the shield is added in experiments

    使用karat程序分析了無箔二極體的迴流屏蔽方法，實驗中發現加屏蔽環后表面閃絡電壓從300kv提高到了400kv 。
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