脈沖加寬 的英文怎麼說

In chapter 2, the pcss are manufactured and two technics are introduced. the practical flow is given. meanwhile the linear operational mode and nonlinear operational mode of pcss are analyzed in chapter 3, after simulating time - space distribution of electron and hole in photoconductor, the relations of laser energy, laser character and photoconduction are analyzed and the fundamental principles of nonlinear phenomenon is introduced

在第一章中，介紹了本論文的研究背景，簡要回顧了超寬帶光導脈沖源的發展歷史，同時概括了本論文的主要工作。在第二章中，介紹了光導開關的製作及工作原理，詳細闡述了實際的加工流程，並分析了其線性和非線性兩種工作模式。

This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。

Micro - controller was programed to measure the width of engine running speed signal successively, via pdiusbd12 these measured data are transmitted to pc, according to some algorithm, for pc program to analyze, process and display angular acceleration, thus diagnose diesel engine

單片機連續採集轉速信號的脈沖寬度，同時通過pdiusbd12將採集的數據上傳到個人電腦，供電腦按照特定的演算法分析和處理，以進行角加速度波形顯示和柴油機故障診斷。

The feedback of the output voltage is the major control loop. to achieve better frequency response and disturbance rejection of the input voltage, a input voltage feed - forward system is introduced in control loop. the duty - cycle of pwm applied at the gate of power mosfet is modulated by both input and output voltage

該晶元採用的控制方式為電壓型pwm （脈沖寬度調制， pulsewidthmodulation ）控制方式，以輸出電壓反饋作為主要控制參量，同時為了提高晶元對輸入電壓擾動的響應速度，採用了輸入電壓前饋方法，將輸入電壓因素引入了反饋控制環中，通過對輸入輸出電壓的檢測，控制加在功率mos管柵極電壓上矩形脈沖的占空比，進而調節輸出電壓。

The factors which influenced the process include the insulator ' s material, structure, the distribution of space electrical field, the way to deal with the surface, the characteristic of voltage waveform, pulse width etc. there are two kinds of theory for the vacuum surface flashover : secondary electron emission avalanche ( seea ) and electron triggered polarization relaxation ( etpr )

影響該過程的因素包括絕緣材料結構、空間電場分佈、表面處理方法、所加電壓特徵，脈沖寬度等。研究真空表面閃絡過程有兩類理論：二次電子發射崩潰（ seea ）和電子引發極化鬆弛（ etpr ） 。

On the basis of a lot of experimental data based on the orthogonal test of pulse peak electric current, pulse width and pulse intermission, experimental mathematical models of electric spark forming of several sorts of materials are built up with multiple linear regression analysis

摘要用正交試驗法對電火花加工中的峰值電流、脈沖寬度、脈沖間隔進行設計，在大量實驗數據的基礎上，採用最小二乘法建立實用的多種材料的電火花加工實驗數學模型。

Numerical examples show that, pulse deformation and broadening, spectrum redshifting, narrowing and distortion take place with increasing diffraction angle in the near field, and the pulse form changes with propagation distance in the near field, but is preserved in the far field

數值計算例說明在近場隨衍射角的增大會出現脈沖變形、加寬、譜紅移、變形、變窄等特性，脈沖形狀在近場隨傳輸距離變化而變化，但在遠場保持不變。

The article quantificational studies the relation between gas quantity and voltage amplitude and pulse width of pulse supply power driving valve

文中對該類型閥門特性之一的進氣量與所施加的脈沖電壓幅值和脈寬的關系進行了定量研究。

Some new phenomenons were discovered. the width of trigger current changes with the discharge condition, it is only 100u. s when let the trigger source work alone, but it can rise up to 300us with the arc current and magnetic field

在研究過程中發現引弧電流脈沖寬度受放電狀態的影響很大，在不引燃主弧時脈寬只有75 s ，而在引燃主弧並在加磁場的情況下會增大到300 s 。

Circuit for stretching pulses

加寬脈沖電路

Micromachining of wideband optical materials with ultra - short laser pulses

超短激光脈沖對寬帶光學物質的微加工

In the hipib strengthening experiments, samples of high - speed steel ( w6mo5cr4v2 ) were irradiated by abstract hipib ( cn + = 30 %, h + = 70 %, ion energy 250 kev, ion current density 60 - 180a / cm2, pulse duration 80 - 100 ns ). microstructure investigation and properties characterization of the treated hss samples were carried out to investigate the effect of current density and pulse number of incident hipib on the surface modification treatment. the physical mechanism of the hipib - solid interaction was established based on the experiments

在hipib轟擊材料表面方面，本文選擇成分由c ~ （ n + ） （ 30 ）和h ~ + （ 70 ）組成、加速電壓為250kv 、脈沖寬度為80 100ns的hipib對高速鋼（ w6mo5cr4v2 ）進行表面輻照處理，研究離子束流密度和脈沖次數對高速鋼微觀結構和宏觀性能的影響，探討了hipib與材料表面相互作用的物理機制。

Then the pulse is modulated by pwm. after the modulated signal through a low pass filter, we can get the change of the frequency that related to the capacitor

對頻率變化的脈沖進行寬度調制，通過低通濾波就可以輸出頻率變化量，也就可以得到相應的加速度值。

It proves that the accuracy of the obtained photon fluence by this kind of method is acceptable. overall, pulse photon fluences in the pulse accelerator and the radiation field caused by pulse reactor have been obtained by strict experimental studies and theoretical calculation in this paper. it provides the technological support to calibration of detectors for physical diagnosis in nuclear exploding

簡而言之，通過嚴格的實驗研究和理論計算，本文測得了12mv脈沖加速器的x射線譜和liftld對較寬能區的中子的let效應因子值，並通過研製的均勻固體電離室測得了脈沖加速器和脈沖堆輻射場的光子注量，解決了幾個相關的技術難題，為核爆診斷探測器的標定提供了技術支撐。

It is found from the experiment that under the conditions of peak magnetic field of 0. 57t, beam pulse fwhm ( full width of half maximum ) of 44ns, a microwave radiation pulse with fwhm 25ns and whole width of 35ns is produced, when the intensity of the guiding magnetic field rises, the peak microwave power changes little but the width of the pulse reduces. the a - k gap also has obvious influence on the microwave radiation, the stable and higher microwave output is obtained under suitable gap

實驗中還發現，在峰值磁場0 . 57t和束流半高寬44ns情況下，得到了25ns半高寬和35ns底寬的微波脈沖信號，隨著導引磁場增加，微波信號幅值基本不變，但國防科學技術大學研究生院學位論文是微波脈沖寬度會逐步減少;實驗中還發現磁場線圈位置有一定的軸向調節范圍，說明在磁場軸向分佈的一定變化范圍內，器件都可以正常工作，這對以後的永磁場系統導引的微波實驗有利。

The result of the test for dynamic breakdown characteristics reveal that breakdown voltage increases as the lengths of the pulses applied to the gate and drain electrodes increase. this could be mainly due to the influence of surface states

Gaasmesfet動態擊穿特性測試結果表明， gaasmesfet的擊穿電壓隨柵極與漏極上所加脈沖電壓寬度的增大而增大，這主要是因為表面態的原因。

Multiple electrical stimulations induced higher rates of activation, cleavage and developmental of blastocysts than single one. 3 continuous electrical stimulations ( 10min, interval ) obtained higher rates of activation and developmental than 2 times and 1 time ( 89. 58 %, 20. 59 % vs70. 83 %, 11. 54 % and 60. 42 %, 14. 28 % ; p < 0. 05 ). ( 2 ) ca2 + in electric medium was crucial to mouse oocyte activation when stimulated with electrical pulses. oocytes were activated more easily in a medium with ca2 + than in one without ca2 + by electrical stimulations, but free calcium concentration in electric medium did not affect the activation efficiency of oocytes ( p < 0. 01 )

脈寬進一步增加並不能繼續升高卵母細胞的激活率；卵母細胞的激活率也隨激活次數的增加而升高，卵子經多次激活處理后，激活率、卵裂率和囊胚發育率都明顯升高，本實驗採用3次連續電脈沖（每次間隔10min ）處理卵子，得到的激活率和囊胚發育率（ 89 . 58 ， 20 . 59 ）顯著高於1次（ 60 . 42 ， 14 . 28 ）和2次處理組（ 70 . 83 ， 11 . 54 ， p 0 . 05 ） 。

The design of the circuit ? key parameters including pulse width in the level shifter part and delay time of the filter circuit, and the necessity to add a limiting current resistor at source the ldmos were emphatic analyzed. author finished the design of each sub - circuit

對電路關鍵參數高低壓電平位移脈沖寬度、高端濾波電路濾波寬度的設計及在ldmos源端加入限流電阻的必要性進行了重點分析，完成了各單元電路的設計。

Irradiating effect and amelioration of radio fuzes irradiated by uws - emp

超寬譜電磁脈沖對無線電引信的輻照效應和防護加固研究

A new pattern position sensitive detector is introduced, so the accelerometer has many advantages including high sensitivity, high resolution and quick response speed. a binary width - modulated pulse rebalance loop is applied in the accelerometer

該加速度計引入了新型位置敏感探測器psd ，使其具有高的靈敏度、解析度和響應速度;同時採取了二元調寬脈沖加矩方式的再平衡迴路。