back to back circuit 中文意思是什麼
back to back circuit
解釋
背對背電路-
This year ' s f1 schedule starts with tough back - to - back intercontinental flyaway races, with round two at the hot and humid sepang circuit in malaysia in just seven days time
今年f1的賽程以一個緊密的洲際背靠背比賽開始。 7天之後，比賽將來炎熱潮濕的馬來西亞雪邦賽道舉行。 -
In the hardware design, the paper completes modules ’ design like outside memory, patulous a / d, patulous d / a, rs232 communication, ecan communication, led control, keyboard control, distant control, emulation, reset, logic voltage switch, dsp supply power regulate and ac - dc power circuit, as well as room layout design like anterior panel, back panel etc. and dsp transfers data with peripheral equipments except outside memory using serial ports. besides, the whole circuit is configured in interrupt response. thus, it can meet system demand as well as take full advantage of tms320f2812 ’ s hardware resource. in the software design, the paper finishs programs like the interface programms intercommunicates with people, the distant control program, ad and da modules ’ control program, in addition, the paper select the velocity and acceleration state - feedback algorithm and is written in the program. the software design uses dsp integrate exploiting environment named ccs2. 2 of ti inc. as software instrument, and programs with the combination of c language and assembly language. moreover, in order to maintenance or modify the software expediently and shorten software ’ s exploitation time, the design adopt software modularization technique. finally, some air cylinder experiments are carried out to proved that the pneumatic controller is very practical
在硬體設計中，本文完成了片外存儲器擴展、 a / d擴展、 d / a擴展、 rs232通信介面、 ecan通信總線介面、液晶顯示控制、鍵盤控制、遠程控制、模擬、復位、邏輯電平轉換、 dsp工作電源校正電路和ac - dc電源等模塊設計以及控制器前面板、後面板等的空間布局設計。其中dsp與除外部存儲器的外圍設備之間的數據傳送全部採用串口通信，同時系統電路配置成中斷響應方式，這樣既滿足了系統要求，又充分利用了tms320f2812的硬體資源。在軟體設計中，本文完成了人機界面功能模塊、遠程控制模塊、 ad擴展模塊、 da擴展模塊、速度和加速度狀態反饋的控制演算法的程序設計。 -
Universal instruments is a global electronics productivity specialist, providing innovative circuit, semiconductor, and back - end assembly technologies and equipment, integrated system solutions, and process expertise to manufacturers in every sector of the global electronics industry
環球儀器公司是一家全球性的電子產品生產設備專業製造商，為全球電子行業各領域的製造廠商提供富有創新性的電路、半導體、後端組裝技術和設備、集成系統解決方案及專項工藝技術。 -
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。 -
The team carried out three drainage surveys and four closed - circuit tv surveys covering extensive areas. dye - tracing was used to track misconnections back to where they originated, and the epd also cracked down on illegal back - lane dishwashing at food stalls and restaurants
負責的隊伍進行了三次廣泛的渠道調查和四次閉路電視調查，此外並應用色粉測試法追蹤誤駁污水管的源頭，以及打擊熟食檔和在後巷清洗碗碟的食肆。 -
When those ptvs are sequentially loaded to cut ( circuit under test ) from intelligent fault diagnosis system, homologous prvs ( parallel response vector ) are taken back. through test response analysis by expert system, intelligent fault diagnosis system can detect all fixed ' 1 ' logic fault, fixed ' 0 ' logic fault, and detect the majority of multi - line short circuit fault
當這些ptvs從pc機中依次加載到被測電路板后，相應的prvs （并行響應向量集）可以獲取供診斷系統進行測試響應分析，從而檢測出固定邏輯故障和橋接故障。 -
Arranged signal activating lock circuit and time - base control circuit in the sound wave receiving circuit to take the initial signal of back wave as the valid one in the cycle, thus to improve the ratio of signal vs. noise and detective precision
在超聲波接收電路中設有信號觸發鎖定電路和時基控制電路。實現以各探頭中最早收到的回波信號為本檢測單元的有效信號，有效提高信噪比和檢測精度； 4 -
At the same time we based on the high precision tuning mechanism and computer controlling feed - back technology to design pid controller. so, we finished design of closed - circuit controlling system and achieved the goal of sampling and feedback
同時，本文在高精度的調諧機構的基礎上，利用計算機控制反饋技術，設計了速度式pid控制器，完成了閉環反饋控制系統的設計，實現了輸出參量光信號採集和反饋的目的。 -
In the section of experiment, we focused on the research of optical system of optical parameter oscillation, computer controlling data sampling closed - circuit system and technology of computer controlling feed - back. in the section of optics, we used present condition to do the experiments about optical parameter effect and got a series of characteristic curve on power transition efficiency and output power
本文的實驗部分主要側重於智能化光參量系統的光學部分、計算機控制數據採集閉環系統以及計算機控制反饋技術的研究。在光學部分，本論文利用現有實驗條件進行了參量振蕩器頻率調諧的研究，得到了調諧曲線，並做了輸出參量光的能量轉換效率以及輸出功率的實驗，得到一系列特性曲線。 -
Planning and designing a microinjection controller on its structure, parameters and circuit tolerance analysis, etc. aspects. based on the primitive electrical microinjection volume controller driven by air - pressure, an improved one with the pressure - keeping function is fabricated. the new controller prevents the dna - fluid from drawing - back by providing a keeping - pressure to it before or after the microinjection
（ 2 ）對微注射量控制器進行了系統、參數及容差等方面的方案設計，並在原有的基礎上進行了改進，構建了帶保壓裝置的氣壓電控式微注射量控制器，克服了原控制器在注射前或完成後易產生的dna液倒吸現象。 -
State - of - the - art safe rooms include an independent phone line, a back - up generator, oxygen scrubbers to replenish the air supply, and closed - circuit television screens connected to computers
藝術級的安全屋含有一根獨立的電話線，一個備份發電機、補充空氣供給氧氣洗刷器，一個連接到電腦的閉路電視屏幕。 -
There is a voltage inverter circuit provided by suzhou auo used to supplying working voltage for the ccfl ( cold cathode fluorescent lamp ) of lcd back light module
同時，蘇州友達光電有限公司為液晶顯示模塊的ccfl （ coldcathodefluorescentlamp ）背光源提供一塊逆變器。 -
In the paper, based on the existing literature research foundation an analog circuit catastrophic fault location approach by using feedforward networks with back ? propagation learning is realized. by this approach, the simulation require ments before test are reduced because fewer training samples are needed, and the fault location process is fast. this method is very efficient in location of single hard fault wit component tolerances. the measureme nt space feature and the general characterization concept of single and double soft fault in linear circuits are presented. according to this concept, a linear circuits soft fault location approach using subhidden layer bpnn is established with element tolerance, and it is shown that this approach is successful in fault location. a double fault feature extraction.,
本文在現有文獻理論研究的基礎上實現了採用bp演算法前向多層神經網路對直流測試下模擬電路硬故障的診斷方法。其特點是採用少量典型特徵樣本作為bp網路的訓練樣本，獲得訓練樣本的代價小，減少了測前工作量，同時診斷速度快，在考慮元件容差時仍有好的診斷效果。文中介紹了線性電路單一軟故障和雙軟故障所具有的電壓增量空間特性和統一特徵概念。 -
This can fully consider the effect of the structure of transmission line and the selection of lighting parameter etc. by calculating and analyzing various of factor that affect the lightning tripping probability of 500kv double circuit transmission line, we can draw the conclusions : the result by intersecting method is more accord with the practicality circumstance than by existing standard methods, using unbalance high insulation and reverse sequence of wire can reduce the contemporary outage rate of double circuit line, reducing the footing resistance is one of the most efficiency method to reduce the back stroking rate of double circuit transmission line, the double back stroking rate and the single back stroking rate will fall by three ground wire, when the footing resistance is 10 ohm, the back stroking rate by three ground wire is 83 percent of by two ground wire
在分析輸電線路繞擊耐雷性能時，對線路的雷電屏蔽問題進行了分析，提出對擊距法進行改進，充分考慮了風速的影響因素，編寫了具有工程實用價值的計算線路繞擊耐雷水平的程序，此方法可以充分考慮線路結構和雷電參數等對繞擊率的影響。通過對影響500kv同桿雙回線路雷擊跳閘率的各種因素進行了計算和分析，得到以下結論：採用相交法的計算結果比定義法更符合實際運行情況。採用不平衡高絕緣方式和導線逆相序排列可以大大降低雙回同時跳閘率。 -
This paper demonstrates how to generate variable pwm waveform based on standard cpld device, the proposed circuit is incorporated with mcu to provide simple and effective solution for high - performance pwm converters. in the brushless model, the igbt ( isolated gate bipolar transistor ) switch state period table is gained by mc33035 which analyzes the signal of position feed - back
這部分功能在cpld器件中用vhdl語言開發實現，其isp （在系統編程）方式使得設計與維護都比傳統方法方便靈活，由於逆變器開關元件的觸發信號是由硬體來產生的，因此更容易實現準確的高速實時控制。 -
Obtained by emtp program and the egm, this paper studies on lightning protection performance on 500kv double circuit transmission line the distributed parameter model of tower is built when analyzing the back stroking lightning protection performance for double circuit line, it can truly reflect the spreading course of lightning current on the tower, furthermore, considering the randomness of working voltage ' s phase when lightning strokes the top tower and supposing the probability of lightning appearing arbitrary phase in a cycle of ac is equal, this paper brings forward the statistical method to calculate the rate of back stroking on double circuit line
本文利用emtp程序、擊距法對500kv同桿雙回線路的耐雷性能進行了研究。在分析同桿雙回線路的反擊耐雷性能時，建立了桿塔的分佈參數計算模型，此模型可以真實地反映雷電流在桿塔上的傳播過程。並針對雷擊塔頂時，導線運行電壓相位角的隨機性，本文假定雷擊出現于交流一周期的任一角度區間內的概率相等，提出了利用統計法計算同桿雙回線路的反擊跳閘率。 -
In communications, the connection, by a common carrier, of the output portion of a circuit back to the input portion of a circuit
在通信技術中，通過公共載體將電路的輸出部分返回到電路的輸入部分的一種連接。 -
First, variable speed constant frequency wind energy convertion theory is described in this paper, then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid. then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability. simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established. to convert the variable frequency electricity into utility grid, back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy. then simulation is implemented to test the control strategy. in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
建立了永磁電機和變流器的數學模型，針對雙pwm變頻器的特點提出了三種控制策略對變流器進行控制，通過變流器交-直-交的變換，將發電機發出的變頻變幅值交流電轉化為可用的恆定頻率的交流電，通過pwm調治能使其輸出功率因數為一，並且該控制系統功率因數為可調，能在特殊情況下同電網交換一定的無功功率，並通過對變流器的控制實現了最大風能俘獲的功能。最後採用matlab / simulink進行了模擬，取得了良好的模擬效果。在風力發電系統中，採用先進的最大功率俘獲演算法，能有效的從風中獲得最大的能量。 -
After a disappointing 1 - 5 west coast swing to senior circuit parks in denver and san francisco, the yankees wing it back to the east coast to take on the baltimore orioles on tuesday in the first game of a three - game series
在歷經對上洛磯及巨人以1勝5敗令人難堪的美國西岸之旅后，洋基飛回美國東岸，將于星期二在金鶯主場展開三連戰系列賽的開幕戰。 -
With the classical pattern recognition theory, the back propagation neural network ( bpnn ) are applied to analog circuit fault diagnosis
最後，對模擬電路的bp神經網路方法和故障樹分析法作了比較。
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