正速度脈沖 的英文怎麼說

中文拼音 [zhēngsùdùmàichōng]
正速度脈沖 英文
positive-velocity impulse
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 速度 : 1. [物理學] velocity; speed; blast; bat 2. [音樂] tempo3. （快慢的程度） speed; rate; pace; tempo
  1. 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。
  2. Backed up by the soplat theory based on particle kinematics, the second chapter of this paper presents with analysis and simulation of several single observer passive measurement models, which uses such relative movement parameters as bearings changing rates and centrifugal acceleration information on the basis of bearings measurements. in the third chapter, the observability of location respectively using bearings and its changing rates information and centrifugal acceleration information is analyzed, and its observable condition is got. the fourth chapter puts forward the modified covariance extended kalman filtering ( mvekf ) against the defect of traditional extended kalman filtering ( ekf ), whose performance is simultaneously compared in the chapter with the performance of ususal tracking algorithm such as ekf, mgekf, iekf by computer simulation

    在近年來提出的基於質點運動學原理的單站無源定位理論基礎上，本文第二章提出了幾種在角度測量的基礎上增加角度變化率及相對運動的離心加速度等運動學參數的單站無源測量模型，並對它們進行了分析和模擬；第三章分別對利用角度及其變化率信息定位和利用離心加速度信息定位的可觀測性進行分析並得到了相應的可觀測條件；第四章針對傳統擴展卡爾曼（ ekf ）方法的缺點，提出了一種修正協方差的擴展卡爾曼濾波（ mvefk ）方法，並將其和ekf 、 mgekf 、 iekf等常用的單站無源定位濾波方法進行了性能模擬比較；第五章通過引入雷達機動目標跟蹤方法和模型，提出了利用角度及其變化率對機動輻射源跟蹤的多級噪聲自適應方法和imm方法；第六章主要對角度變化率和離心加速度參數的獲取技術進行了研究，提出了幾種高精度測量脈沖序列多普勒頻率變化率的方法。
  3. Many experiments on the effects with the change of several parameters, such as initial charging current, amplitude and frequency of positive pulses, variety of the amplitude of positive pulses among each charging stages, amplitude and duration of negative pulses, duration between positive and negative pulses, have been performed. the results of analysis and comparison of experimental data verify the validity and feasibility of the fast - charging method. on this basis, a new type of control strategy is advanced

    就充電過程中的起始充電電流、正脈沖的幅值、正脈沖的頻率、各充電級之間正脈沖幅值的變化幅度、負脈沖的幅值、負脈沖的持續時間、正負脈沖之間的停歇時間等幾個參數進行了大量的實驗，對實驗數據進行分析和比較，驗證了快速充電方法的有效性和可行性，在此基礎上提出了一種新型快速充電控制策略。
  4. X fluorescence can quickly carry out measurement without damage and motion. it was widely adopted in geology, mining, environmental - protection, archaeology and industrial - analysis. its principium is that in measurement of radioactivity, the pulse energy is directly proportional to pulse signal amplitude detected by the radiation detector

    X熒光方法可以實現快速、原位、無損測量，被廣泛應用於地質、礦業、環保、考古、工業在線分析等領域，其原理是：在核能譜測量工作中探測器輸出的脈沖信號與入射粒子的能量成正比，通過測量脈沖信號幅度，得到入射粒子的能量。
  5. The system can generate three - phase spwm pulses and has following characters : the range of modulation frequency is from 0 khz to 4 khz. and can be divided to 7 classes to control. the carrier frequency may be selected up to 24 khz, and can be divided to 8 classes to control ; rotational frequency is defined to 16 bits

    該系統能產生三相六路正弦脈寬調制（ spwm ）波形;調制頻率范圍為0 4khz ，分7級控制; 16位的速度控制解析度;載波頻率分8級控制，最高可達24khz ;系統介面兼容intel系列和motorola系列單片機;該系統控制簡單、精確，易修改，可現場編程;同時具有脈沖延時小、最小脈沖刪除、過壓和過流保護功能等特點，可應用於pwm變頻調速系統的全數字化控制。
  6. We derive an analytic expression of the group velocity dispersion ( gvd ) induced chirp and the self - phase modulation ( spm ) induced chirp in the normal dispersionregion of non - kerr - like optical fibers with saturable nonlinarity. the evolution of chirp is simulated by numerical methods. the studied results show that the more powerful saturable effects, the smaller is chirp and the gently is chirp. the net chirp is zero in the central region of the pulse

    從理論上推導出具有飽和非線性的非克爾光纖正常色散區內，群速度色散效應導致的啁啾和自相位調制效應導致的啁啾解析表達式.利用數值解法模擬了非克爾光纖正常色散區啁啾演變過程.研究結果表明：當非克爾光纖的飽和非線性增強時，凈啁啾不斷減小，而且，越來越平緩，脈沖中心附近區域凈啁啾接近零
  7. Then, a semi - analytical solution for the velocity response of the pile subjected to a semi - sine wave exciting force was derived by using invert fourier transform

    利用付立葉逆變換，給出了半正弦脈沖激勵下樁頂速度時域響應半解析解。
  8. The sinusoidal pulse width modulation variable - frequency speed - regulated system based on 80c196mc microcontroller

    單片機的正弦脈沖寬度調制變頻調速系統
  9. With laplace transforms, the question can be solved in laplace domain. with the aid of impedance transmit functions, an analytical solution for the impedance function in laplace domain is yielded, so is the corresponding analytical solution for the impedance function in frequency domain, semi - analytical solution of velocity response in time - domain subjected to a semi - sine exciting force and mobility at the level of the pile head

    利用拉普拉斯變換，將定解問題轉化到拉普拉斯域內求解，結合阻抗函數的傳遞性，得到了拉普拉斯域內的樁頂阻抗函數解析解，進而得到了頻域內的樁頂阻抗函數解析解、半正弦脈沖激振力作用下的速度時域響應半解析解和速度導納。
  10. The main original work includes : 1. the interaction between an integral pile and a uniform visco - elastic soil layer with viscous damping or hysteretic damping is theoretically studied, and the pile response to a harmonic load is obtained in a closed form and used to define complex stiffness at the pile head. semi - analytical solution of the velocity response in time domain subjected to a semi - sine wave exciting force is also given

    主要工作包括： 1 、在考慮樁周土三維波動條件下，對滯回阻尼、粘性阻尼單層均質土中樁土縱向耦合振動問題進行了解析研究，分別得到樁頂位移、速度頻域響應以及復剛度的嚴格解析表達，以及半正弦脈沖激振力作用下樁頂時域響應半解析解。
  11. Thus the resistance factor and vibration modes of the soil layer are obtained and used to analysis the pile response. by considering the interaction between the soil layer and the pile with boundary condition of continuity of displacement and equilibrium of force at the interface of soil layer and pile, the dynamic equilibrium equation of pile is solved and an analytical solution for the pile response in frequency domain is yielded, which is used to define complex stiffness and mobility at the level of the pile head. based on the convolution theorem and inverse fourier transform, a semi - analytical solution of velocity response in time - domain subjected to a semi - sine exciting force is given

    首先通過引入勢函數方法對土體位移進行分解，從而將土體動力平衡方程解耦，求解得到了土層的振動模態和阻抗因子，然後利用該解以小應變條件下樁土接觸面上力平衡和位移連續條件來考慮樁土耦合作用，求解樁的動力平衡方程，得到了樁頂的頻域響應解析解、復剛度和速度導納，利用卷積定理和傅里葉逆變換，求得了半正弦脈沖激振力作用下樁頂速度時域響應半解析解。
  12. The intracavity photon density and initial population inversion density are assumed to be gaussian distributions instead of plan wave assumption, based on this assumption, the rate equations of diode - pumped intracavity - frequency - doubled passively q - switched laser are modified. through solving these space - dependent rate equations numerically, the results under different assumption are compared. 5

    將腔內光子密度和初始反轉粒子數的平面波近似修正為高斯分佈近似，獨立地導出描述二極體泵浦內腔倍頻-被動調q激光器的速率方程，並通過數值求解該方程比較了兩種近似下脈沖特性的不同； 5 .實驗驗證了2中提出的實驗方案，並對實驗結果進行了分析。
  13. 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。
  14. This paper gave a general method to solve the accelerate damage boundary ( adb ) of the packaging system by finding the adb of two representative packaging systems under type wave. as for the displacement damage boundary ( ddb ) of the packaging system, this paper fist defined the dda of the bilinear packaging system under half - sine wave and other kind packaging systems by analysis. moreover, the course of solve this kind of problem by analysis was given

    論文研究了兩種典型脈沖激勵下的非線性包裝系統的加速度損壞邊界及其影響因素，總結了求解加速度損壞邊界問題的一般思路；針對包裝系統的位移損壞邊界，文中首次運用解析法確定了半正弦波激勵下雙線性包裝系統的位移損壞邊界，歸納了用解析法解決此類問題的一般過程，同時，本文還對此給出了應用更為廣泛的一種數值方法。
  15. In this paper, we design two types of flexible hinge, which are column stagger flexible hinge and flat straight round flexible hinge. the control system of the drive equipment includes the unity of the central console and control module. the console regards vc + + 6. 0 as the tool, it can set pulse number and pulse speed, start and stop the electromotor

    微驅動裝置的控制部分由上位機和控制模塊組成，上位機採用vc + + 6 . 0編制控制界面，可以設置電機旋轉所需的脈沖數和脈沖速度，可以實現電機的起停，正反轉及脈沖清零等工作，還可以分別控制不同鏡架的電機及相同鏡架的兩個電機。
  16. Transmit pulse signals of the proximity switch or photoelectric sensor to monitor, and contrast them with preset values, accordingly judge that if speed is normal

    利用近接開關或光電開關所?集到的脈沖訊號，送到監視器和預先設定值加以對比，以顯示移動速度是否正常。
  17. Adopting relatively simple mechanical model and predigested boundary condition and taking a straight bar applied one end with an semi - sine impulse to simulate the rigid target impacted by a projectile as an example, the relation between the stress wave propagation and acceleration of projectile has been analyzed by theoretical deduction and computer simulation

    摘要採用較為簡單的力學模型和簡化的邊界條件，以直桿一端施加一半正弦載荷脈沖和模擬彈體沖擊剛性靶為例，用理論推導和計算機模擬的方法分析應力波傳播和彈體加速度的關系。
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