in-circuit zero 中文意思是什麼
in-circuit zero
解釋
在線零位-
When the galvanometer reads zero the circuit is in the null-balance position.
當檢流計的讀數為零時，電路處于零平衡位置。 -
A novel phase - shifted zero - voltage and zero - current switching pwm dc / dc full - bridge converter is presented in this thesis, which is based on the groundwork of summarization of the development of power electronics in recent years and lucubration in theoretical basis of modern high frequency soft switching power convert technique and analysis of operation principle, characteristic of the circuit and inherent drawbacks of the traditional phase - shifted zero - voltage switching pwm dc / dc full - bridge converter
本文在對近年來電力電子學科的發展高度綜述和對現代高頻軟開關功率變換技術理論基礎深入研究的基礎上，對傳統的移相控制zvspwmdc dc全橋變換器的工作原理、電路特性、存在的缺點進行了分析，在此基礎上提出了一種改進型的移相控制zvzcspwmdc dc全橋變換器。 -
Analyzing the variation of the nozzle arc parameters at current zero, in addition, analyzing the breaking property of the studied circuit breaker on the basis of the theory
分析了電流過零時噴口內電弧參數變化的原因，此外，從理論上對所研究的斷路器的開斷性能進行了分析。 -
Zero insertion force a kind of integrated circuit socket where no pressure is needed to insert the chip. these sockets are used in eprom programmers, burn - in boards and test jigs
零插拔力：一種集成電路插座，插入晶元時不需要壓力。這些插座在eprom編程器、老化板和測試夾具中使用。 -
The development of a visual short circuit software under ptcad2000 is presented in this paper, as well as the system structure, the definition of the data structure, the interface to ptcad2000, the conversion of the original wiring diagram of power network to calculable power network, the implement of three sequence network, the implement of impendence matrix and admittance matrix of power network considering the zero sequence mutual inductances among lines, and the implement of short circuit calculation by using computer
本文介紹了在ptcad2000平臺下短路電流可視化計算軟體的開發。介紹了軟體的系統結構、數據結構定義、與ptcad2000平臺的介面、電力系統原始接線圖轉成等值可計算網路、序網的生成、考慮零序互感線路阻抗時電網導納矩陣和阻抗矩陣的生成，以及故障點短路電流計算的計算機實現。 -
Some anti - interference techniques are introduced such as appropriate circuit layout and wiring, the component and device screening as well as digital filter and the zero point processing in software
提出了通過從電路合理的布局布線和元器件的篩選以及軟體的數字濾波和零點處理等措施來達到抗干擾的目的。 -
For the limitations of traditional pwm hard switching circuit, a kind of zero of pair soft switching technology is introduced and the switching loss can be cut down by it and the reliability of inverter in case of high frequency can be improved also
由於傳統pwm硬開關電路的局限性，本文採用一種雙零諧振型軟開關技術降低開關損耗以及在高頻情況下提高整機的可靠性。 -
In effect, a negative resistance is inserted in the circuit so that its total resistance is zero.
實際上，這就是把負電阻接入電路，使電路的總電阻為零。 -
Thus, at zero magnetic field the metal disk acts as a short circuit ( very low resistance ), and in a strong enough field it is equivalent to an empty space ? an open circuit ( very high resistance )
因此，沒有磁場時金屬圓盤會造成短路（電阻很低） ，磁場夠強時它就像空無一物的空間，成為開路（電阻很高） 。 -
A novel cycloconverter - rype three - phase hf link inverter topology for soft - switching based on phase - shifted full - bridge mode is proposed, whose main advantages are as follows : under the conditions of d < i < and overlap - d, the switches of the leading leg are turned on at zvs and the switches of the lagging leg are turned off at zcs and all switches of the cycloconverter circuit are commutated in the overlapping mode in the interval of zero voltage, which makes the circuit realize soft switching to the utmost extent and reliably solve the problem of peak voltage caused by the storing energy of leakage inductance of hf transformer
論文提出一種新型移相全橋軟開關周波變流型三相高頻鏈逆變器，電路的主要優點是：前級移相全橋的移相角控制在_ d _ i和_ （ overlap ） - _ d條件下，超前橋臂零電壓開通，滯后橋臂零電流關斷，並使周波變流器所有開關在零電壓期間重疊換相，使整機開關最大程度地實現了軟開關，並可靠解決了高頻變壓器漏感儲能引起的電壓尖峰問題。 -
Remember the following words and expressions : e. g. multimeter ； circuit ， current ； voltage ； resistance ； digital multimeter ； analogue multimeter ； analogue multimeter scales ； zero adjustment control ； zero adjustment control for resistance ranges ； measurement ranges switch ； transistor test socket ； meter probe ； positive terminal ； negative terminal ； anode ； cathode ； red lead ； black lead ； power supply ； connect in parallel ； connect in series
記住萬用表、電路、電流、電壓、電阻、數字萬用表、模擬萬用表、表頭、機械零位調整器、歐姆零位調整器、量程選擇開關、晶體管插孔、表棒、正接線端、負接線端、陽極、陰極、紅導線、黑導線、電源、並聯、串聯等常用英文單詞，並逐步掌握。 -
In hardware design, a / d, mt8880, serial port communication module and other interface circuit are described. in software design, the related algorithms such as scale transform, digital filter, digital zero, dtmf communication and repeated output program are considered
硬體設計主要介紹了a d轉換、 mt8880 、串列通信等模塊和介面的電路設計，軟體設計主要介紹了程序設計中比較關鍵的標度變換、數字濾波、數字調零和重復輸出等數據處理的演算法以及利用dtmf信號實現數據採集器和監測站傳輸數據的通信軟體設計。 -
A resolution method in software is applied to calibrate zero point and full scale of the circuit. software approach to nonlinear correction for sensor and circuit is presented. therefore system error is eliminated, and measurement accuracy of temperature is improved. the signal of acidity electrode is detected by a differential amplifier circuit, which consists of operational amplifiers tlc2254 with high input impedance and low drift
採用橋路和單運放差動放大電路對溫度傳感器信號檢測放大，軟體校正溫度傳感器和測量電路的非線性，軟體校準測量電路的零點和滿度，消除測量電路的系統誤差，提高補償溫度的測量精度；採用高阻、低漂移運放tlc2254組成高阻差動放大電路用於酸度電極信號測量。 -
By compared with the simulation results and the experiment results, we come to the conclusions that : ( 1 ) circuit with assistant network can widen soft - switching extent in lagging arm, reduces duty - cycle loss on the secondary, diminishes switching dissipation of inverter spot - welding power source. ( 2 ) the range of resonant capacitor, the important factor to soft - switching process, not only affects zero - voltage turn - off of power switches, but also affects the range of zero - voltage turn - on of power switches. so resonant capacitors must be considered according to many aspects ; ( 3 ) it easily fulfils soft - switching condition in lagging arm as leakage inductance of power transformer increases, but bigger leakage inductance of power transformer increases opening dissipation of transformer and decreases efficiency of soft - switching inverter power source
通過模擬結果與軟開關點焊逆變器試驗結果的對比分析，得到了如下主要結論：採用輔助網路可以完全拓寬全橋軟開關逆變器的滯后橋臂軟開關范圍，減小了次級占空比丟失，降低了逆變電阻點焊電源的開關損耗；諧振電容是影響軟開關工作狀態的重要因素，其大小不僅影響開關管的零電壓關斷，同時也影響開關管的零電壓開通范圍，因此，諧振電容應該綜合考慮；功率變壓器漏感越大，越容易滿足滯后橋臂的軟開關條件，但是大的漏感也使變壓器的通態損耗增加，降低了軟開關逆變器的效率。 -
When zero sequence or high secondary harmonic current component appear in the circuit, the total current in the shield is zero, no electromagnetic interference with outside
當線路出現零序或高次諧波電流分量時，屏蔽層內電流總和為零，不對外界產生電磁干擾。 -
In ac circuits, the power consumed in a circuit will be zero if the voltages and currents are exactly90degrees out of phase with each other
在交流電路中，若電壓、電流相位正好相差90 ，則電路上消耗的功率為零。 -
The following is the main works and conclusions of this thesis. the novel upfc needs high power rate because it is generally used in high voltage transmission lines. after studied high - power converters and the literatures of upfc, the main circuit topology of novel upfc base on diode - clamping multilevel inverter is presented and the principle of using novel upfc to eliminate zero sequence and negative sequence currents is analyzed
本文所做的主要工作及得出的主要結論如下：由於upfc一般用於高壓輸電線，其功率等級要求很高，在綜合研究大功率變換器和upfc現有文獻的基礎上，提出了基於二極體箝位多電平變換器的新型upfc的主電路拓撲，分析了用其來濾出高壓輸電線非全相運行時所產生的零序和負序電流的原理。 -
The first part of the paper is designing the testing project for grounding resistance and insulation resistance in a new way. using 16bits ad converter with programmable control amplifier replaced the way which used changing resistance to change measure range. lt is not only improved testing precision and develop the system expediently, but also reduced the area of the circuit boardwith the new way. in order to make the electric implement safety testing system have upstanding expansibility, the software and hardware of the system adopted the modularization design. adopted mcu atmegal28 as a master mcu which control mmi, realtime clock and communication with slaver mcu. atemga8 as the slaver mcu to realize testing function. so it is easy to add or reduce the testing project. the testing implement system has been developed successfully, and the comments for the system is that it has high precision, high expansibility and easy maintain. but considering the electric implement system should have intelligence and humanity abi lity. so this paper bring forward a scheme of electric equipment safety testing embedded system with speech control. after introduce the basic theory of speech recognition, the paper expatiate the characters of this system. the system is a noise conditon, not special people, small glossary, insulation word system. with these characters design the speech recognition as fellow. utilizing cross zero ratio and short energy to ensure jumping - off point and end point ; adopting mfcc as the character parameters of speech recognition ; the character parameters than be recognized by dtw. in order to ensure the credibility of this project, first realized by matlab in computer
在介紹了語音識別的基本原理后，闡述了本系統的特點：本系統是一個噪聲環境下非特定人、小詞匯量、孤立詞的語音識別系統。根據本系統的這些特點設計了如下語音識別方案：利用過零率和短時能量相結合的方式確定語音端點；採用mel頻率倒譜系數（ mfcc ）作為語音識別的特徵參數；得到的特徵參數最後通過動態時間規整（ dtw ）的模式識別方法進行識別。為了確保本系統實現方案的可靠性，首先通過計算機利用matlab軟體來模擬，在演算法模擬實現后又進一步增加環境的復雜性：加上較大的環境噪聲、突發性的噪聲等，再通過修改參數、修改參考模板、兩級識別等各種提高語音識別精度的方法來提廣東工業大學工學碩士學位論文高識別率。 -
If no independent source exits in a first - order circuit, the response to it is called the zero - input response
如果不存在獨立電源，那麼電路的響應稱為零輸入響應。 -
The microprocessor is used to realize digital control as flip plus of the scr. the ic chip sa866ae of mitel company is utilized as the low frequency signal generator of the system. furthermore in the zero - current detection circuit, use the photocoupler gaalas ired and photo ic to detect zero - current, furthest shorten the commutating " died region ", prevent the current from distorting
設計中採用單片機控制可控硅的觸發脈沖，實現數字化控制，並利用mitel公司的三相pwm交流電機脈寬調制晶元sa866ae ，成功研製了交-交頻器中的低頻信號發生器裝置，效果良好；此外利用用光電檢測元件進行系統零電流的檢測，盡可能地縮短換相死區，防止電流發生畸變，成功地解決了原有低頻電源系統中存在的兩大難題。
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