negative pulse 中文意思是什麼
negative pulse
解釋
負極性脈沖-
There has been a revolutionary advance in ultrashort pulse technology since the discovery of self - mode locking of ti : sapphire lasers. few - femtosecond pulses have already been generated from ti : sapphire lasers, by means of combining self - phase modulation with negative group velocity dispersion, which is similar to the way of soliton generation
鈦寶石激光自鎖模的發現使得超短脈沖技術發生了革命性的變化，利用自相位調制和負群速度色散結合的類孤子產生方式，人們已經在鈦寶石鎖模激光器上得到了脈寬只有幾個飛秒的光脈沖。 -
The second, at the high frequency primary coil, when switch turn on with control signal ( the spwm pulse is modulated ), in the positive or negative semi - period of low frequency modulation signal, transformer coil with same direction voltage. the magnetic flux of transformer core will increase step by step. at the end, it leads to magnetic flux saturation
二、在高頻變壓器原邊，當開關管接收控制信號脈沖列（經調制的spwm波列）導通時，在低頻調制信號的正半周或負半周內，施加在變壓器繞組上的是同一方向的電壓，變壓器磁芯中的磁通可能將級進地逐漸增加，導致磁芯飽和，造成磁偏或單向磁化，導致低頻電信號放大失真或由於很大的磁化電流而無法正常工作。 -
Its products comprise various types of electrostatic precipitator 、 long bag low pressure pulse 、 positive ( negative ) pressure reverse flow 、 rhombus bag filter ( explosion proofing and ordinary type ) 、 pulsant rotary reverse flow flat bag filter 、 gas - box pulse bag filter ; flue gas desulfurization 、 waste water treatment facility and different nonstandard equipment
主要產品有各種型號的靜電除塵器（管極式及極板式） 、長袋低壓脈沖袋式除塵器、正（負）壓反吹大布袋除塵器、菱形袋式除塵器（防爆型及普通型） 、脈動反吹扁袋回轉式除塵器、氣箱脈沖除塵器等收塵設備；煙氣脫硫設備、水處理設備及各種規格的非標設備。 -
The positive and negative frequency expressions of quasi - monochromatic optical fields of a pulse in fiber - optic communication and the positive and negative frequency forms of fourier transformations and nonlinear schr ? dinger ( nls ) equations are discussed
摘要討論光通信中脈沖的準單色光光場的正負頻表示，正負頻形式的傅里葉變換，正負頻形式的非線性薛定諤方程及它們之間的關系。 -
Study and design of control system of negative high - voltage pulse power supply for ecrh
負高壓脈沖電源控制系統的研究與設計 -
There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not
首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。 -
Rise fall time, positive negative pulse width,
上升下降時間，正負脈沖寬度， -
Negative justification negative pulse stuffing
負碼速調整負脈沖塞入 -
Influence of negative pulse on aluminum alloy micro - arc oxidation
負脈沖對鋁合金微弧氧化的影響 -
Numerical results indicate that the sheath expands faster than dust - free sheathes. it is also shown that, for small dust particles, the motion of dust particles is very remarkable and the charging effect can be negligible, and for large dust particles, the charging effect of dust particles becomes more evident while they are almost kept stationary during the whole negative potential pulse
計算結果表明：塵埃等離子體鞘層要比無塵埃粒子的等離子體鞘層擴展地快；對于小顆粒的塵埃粒子，塵埃粒子的運動十分明顯，而塵埃粒子的充電效應幾乎可以忽略；對于大顆粒的塵埃粒子，充電效應將變得十分明顯，而塵埃粒子在整個負脈沖階段，幾乎保持不變。 -
The variable polarity power supply circuit uses two stages full - bridge inverter, the former inverter is regarded as a constant - current source with fast dynamic response, and supplys energy for the second one, and the latter one is to produce variable polarity current excellently, and low - frequency pulse current by variable polarity power supply is used to reduce input energy and control the shape of weld bead while welding. a series of high - frequency pulse current is superposed on direct - current - electrode - negative ( dcen ) current through the high - frequency pulse power supply, which is used to compress the arc and improve process of crystallization
其中變極性電源採用二次全橋逆變結構，一次逆變提供快速的響應速率並給二次逆變提供能量，二次逆變提供良好的變極性性能，使輸出能量最優化，並用其低頻電流特性減小電弧線能量，控制焊縫成形;高頻脈沖電源提供的高頻電流疊加在反極性電流dcen上，利用電流的高頻特性壓縮電弧，改善焊縫金屬結晶過程。 -
With the use of new mcu p87c591, as the techiniques of serial communication and negative display of lcd, the dashboard has a very beautiful apearence and the system is simplified. not only the analogy signal and the pulse signal can be sampled into the instrument, but also the datum on the can - bus should be transferred into the system whit the connection to the in - vechile network. under the guindance of the idea of " informatic design ", the digital lcd dashboard system is developed, and the professional manufacturer of lcd display device is directed to develop and to design the special lcd module, by which the new lcd production is greatly optimized. all these intentions bing about a very well goal
在研製數字液晶儀表過程中，應用了新型單片機p87c591 、串口驅動技術和負顯技術，使該數字液晶組合儀表結構簡單，視覺美觀，既可以通過模擬通道、數字通道測量車輛傳感器的信號，又具備接入車輛總線、從can總線上獲得相關數據的能力。在項目開發過程中，運用「信息化設計」的觀點開展液晶顯示模塊的開發和設計工作；並根據軟體工程的原則，優化了液晶模塊的電路設計，使該項產品的開發取得了好的效果。 -
Abstract : enhancing function of pulsating draught for sintering process is studied with simulative burden in the laboratory. the experiment results indicate that sintering velocity is the fastest along with appropriate pulse draught frequency when negative pressure is lower
文摘:採用模擬原料，在試驗室內的脈動燒結裝置上，進行脈動氣流燒結試驗，探討了脈動氣流的頻率變化和抽風負壓等因素對燒結過程的強化作用 -
( ii ) charging effects on temporal and spatial evolution of dusty plasma sheath in plasma source ion implantation. the temporal and spatial evolution of a dusty plasma sheath in plasma source ion implantation has been investigated with a fluid theory and a self - consistent dust - charging model. a negative potential pulse is introduced to form the plasma sheath
（ ）塵埃粒子的充電效應對等離子體源離子注入（ ps ）鞘層時空演化的影響採用流體模型及自洽的塵埃粒子充電模型，我們研究了等離子體源離子注入時的塵埃等離子體鞘層的時空演化。 -
Investigation of the effect of negative third - step chromatic dispersion in adiabatic pulse compression in edfa
脈沖絕熱壓縮中負三階色散影響的研究 -
Due to technology demand would carry out multi - place measure of wind pressure or negative pressure. because measured medium include high concentration coal powder and coal dust grain, often makes sample pulse pipe to stop up, and effect on correct measure of wind pressure, so to safety production causes serious menace
由於工藝上的需要，要進行多處的風壓或負壓的測量，因被測介質中含高濃度的煤粉或煤灰顆粒，常使取樣脈沖管堵塞影響風壓的正確測量，對安全生產造成嚴重威脅。 -
From the numerical result, the pulse of the positive pressure and the negative pressure were clearly observed
從而得到了爆炸波流場的數值全息干涉圖。 -
Positive negative pulse width, totalize, peak voltage, time interval average and time interval delay
正負脈波寬度總和峰值電壓時間間隔平均及時間間隔延遲 -
They pointed out that modulation wave fronts ( such as those in the front of a light pulse ) in a negative index material are aligned the same way as they are in a positive index material ? anything else would violate basic causality and require parts of the wave to travel with infinite velocity
他們指出在負折射率材料中調制波前（例如光脈沖前端的波前）的方向，與在正折射率材料中相同；若非如此，就會違反基本因果律，且部份波的前進速度將成為無限大。 -
Pulse corona and a new mechanism of the negative steppedleader in cloud - to - ground lightning discharge
脈沖電暈與地閃負先導梯級性機制模式探討
分享友人