量化頻率調制 的英文怎麼說

中文拼音 [liánghuàbīndiàozhì]
量化頻率調制 英文
qfm quantized frequency modulation
  • : 量動1. (度量) measure 2. (估量) estimate; size up
  • : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
  • : 率名詞(比值) rate; ratio; proportion
  • 調 : Ⅰ動詞1 (配合得均勻合適) harmonize; suit well; fit in perfectly 2 (使配合得均勻合適) mix; adju...
  • : Ⅰ動詞1 (製造) make; manufacture 2 (擬訂; 規定) draw up; establish 3 (用強力約束; 限定; 管束...
  • 量化 : quantization量化器 quantizer; digitizer; 量化失真 quantizing distortion; 量化條件 quantum conditi...
  • 頻率 : frequency; rate
  1. The modulation of sound properties over a wide range of time scales is one of the most obvious characters of oscine passerine ' s vocal, whose song contains many different kinds of syllables that consist of many more multiple song phrases. in oscine passerine, ipsilateral projections of ra to nxiits innervates the ipsilateral syringeal muscles exactly, and thus they have strong ability of vocal control with variable tones, high frequency and higher lever of quality. as a result, the songs sound well

    鳴禽鳴囀的最大特點之一便是其單次鳴唱時間長,鳴唱所包含的音節數和音節種類繁多,因而由這些音節所組成的句型結構也是復雜多樣富於變,且由於nxiits嚴格的側別控(每一側核團只支配同側鳴肌) ,使其具有更強的控聲能力,其鳴聲音調幅度大,高,品質因數大,音色好,因而其鳴聲也悅耳動聽。
  2. Compared with non - passerine, they appeared longer syllable length, higher basic frequency and more viable frequency ranges. though the amplitude modulation properties enhanced their vocal production, the type of syllable is still stable and less of variety. so the phrase consisted of syllables are comparatively few and changes of the tone are relatively less

    且表現出很強的調特性和特有的幅度調特性,相對的音節時程比較長,基較高且范圍較大,所特有的幅度調特性更增加了其控聲的能力,但其音節的種類仍很單一,缺乏變,由音節所組成的句型較少,音調幅度不大,因此,其叫聲質盡管較非鳴禽有所改善,但相對鳴禽而言卻又遠遠不如。
  3. Undershoot undershoot refers to the amount by which voltage or frequency drops below the nominal value as the voltage regulator or governor responds to changes in load

    下超調下超調指電壓調整器或控器在應對負荷變時,電壓或低於額定的
  4. First, how to conduct sample and quantification of continuous time signal which is prior condition of sdr is explored in detail, and the comparison and analysis of some sample modes are given in which band pass signal sampling theorem is most important. second, multi - sample rate signal processing which is an important basis of sdr is studied. emphasis are put on decimation and interpolation those are the most fundamental process and the realization of decimation and interpolation filter

    在基於中采樣的軟體無線電結構框架下,首先詳細探討了軟體無線電的前提條件,即如何對連續時間信號進行采樣,比較分析了幾種采樣的方式,其中最為重要的是帶通信號采樣定理;然後探討了軟體無線電的一個重要基礎,即多采樣信號處理,重點討論其最基本的兩個過程抽取和內插以及抽取器和內插器的實現;接著介紹了結構簡單、適用於一級抽取的cic濾波器和適用於做2倍抽取的半帶濾波器;再次論文在總結了傳統的調調基礎上,結合軟體無線電器件的特點,系統的探討並實現了基於正交思想的am 、 fm 、 ask 、 fsk 、 bpsk 、 qpsk的正交調調演算法。
  5. In this paper, several scheme of vscf is compared firstly, of which gets doubly - fed generating mode. doubly - fed vscf wind power generating system uses a doubly - fed induction generator, which rotate speed can be able to change with wind turbine, and it ensures a constant - frequency output, by controlling the frequency of current input into rotor windings. in vector trans control system, the control of stator active power and the control of stator reactive power can be essentially decoupled, and the former is via torque component and the latter is via exciting component of stator current

    本文首先比較了幾種變速恆方案,從中選擇了雙饋式變速恆方案;它運用雙饋電機的工作原理,允許發電機轉速變,而在電機轉子側接入低勵磁電流,通過控該電流的,保證雙饋電機定子輸出的恆定;再結合矢技術,通過調節轉子電流來控定子電流的轉矩分和勵磁分,相應獨立地控發電機輸出的有功功和無功功
  6. At present, people usually use birefrigence and quasi - phase - matching methods to achieve higher effiency in the process of conversion. a significant advantage of quasi - phase - matching method is that the interaction is occurred through the largest element of the x ( 2 ) tensor ; the period of optical superlattice can be designed randomly, and any interaction can be matched without walk - off angle ; they are fitted to be used in frequency conversion of lower power especially. the quasi - phase - matching method has some advantages over birefrigence method, improving the efficiency of frequency conversion ; the range of frequency conversion covers its whole transperant wavelength

    由於準相位匹配技術有其獨特的優勢,可以利用非線性光學晶體的最大二階極,如ppln 、 pplt 、 ppktp用的非線性極都是d _ ( 33 ) ,其有效非線性系數高出普通非線性光學介質(如bbo 、 lbo 、 ktp )一個數級,而且可以人為靈活設計調周期,通過周期設計其變換范圍可以覆蓋準相位匹配介質的整個透明波段,選擇無走離效應,解決了常規pm難以解決的問題,拓寬了非線性晶體的應用范圍,極大地提高了轉換效,已成為非線性光學材料和固體激光器的研究熱點之一。
  7. Due to the complexity of the structure and control of cycloconverter - type three - phase hf link inverter for soft - switching based on phase - shift - controlled full - bridge mode, a simple and optimized vvvf control strategy is proposed. this control strategy includes : produced pwm by space voltage vector ( svm ) and equivalent carrier frequency fe = 1 / te are introduced into the pdm control of the cycloconverter ; softened equivalent pwm wave is generated at the notches of hf voltage pulses ; the harmonious control between regulating pulse width by phase - shifted angle and regulating voltage of equivalent pwm is to minimize the harmonics content of output voltage of the inverter

    西安理工大學博士學位論文針對這種前級移相全橋軟開關周波變流型三相高鏈逆變器結構和控的復雜性,提出了一種實現簡單而整體優的vvvf控策略:將空間電壓矢產生p姍的方法svm和等效載波fe = 1 / te引入到周波變流器的pdm控;按高電壓脈沖前後沿軟等效p翎波;用移相調節高脈沖寬度和等效p姍調壓協調逆變器輸出電壓,在滿足輸出電壓條件下使諧波最小。
  8. 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光參系統的光學部分、計算機控數據採集閉環系統以及計算機控反饋技術的研究。在光學部分,本論文利用現有實驗條件進行了參振蕩器調諧的研究,得到了調諧曲線,並做了輸出參光的能轉換效以及輸出功的實驗,得到一系列特性曲線。
  9. According to the results of experiments, the stability of detection and the significance of photocurrent normalized are discussed. how the illumination mode, the frequency and the resistance of photocurrent loop affect the response of photocurrent is analyzed in detail. and the pilot study on the real - time detection of laps system has been done

    根據實驗結果分析討論了新系統的測穩定性,以及光照射方式、光調和光電流迴路阻抗對光電流響應的影響,以及光電流歸一處理的重要性,並且初步研究了laps系統的實用實時檢測。
  10. 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

    的脈沖進行寬度調,通過低通濾波就可以輸出,也就可以得到相應的加速度值。
  11. A new full - wave measurement circuit structure is put forward that would increase distribution automation system reliability and veracity. the distributed protection and monitoring unit in this paper can instead of general instruments of low voltage distribution system. it not only combines ampere meter, voltage meter, active power meter, reactive power meter and power meter, frequency meter into a meter, but also increases monitoring position switch, control bus switching alternately and monitoring energy

    本文研製的保護和測控單元,可替代低壓配電系統中所使用的常規儀表,將原來迴路需要的電流表、電壓表、有功功表、無功功表和功因數表、表簡為一塊表,並增加了位置開關檢測,控母線投切和電度監測功能,從而極大的簡了低壓配電二次儀表設計、安裝調試,提高了運行、維護和管理水平。
  12. We give ptr ' s amplitude and phase signal of one dimension based on the theory of ptr, discuss the ptr ' s signal ' s frequency characteristic, and a method for measuring thermal diffusivity of opaque materials is introduced. then, we study on anisotropic materials " thermal conductivity, the temperature field and thermal conductivity tensor of anisotropic materials is theoretically deduced from the theory of ptr, and is proved by the experiment

    從光熱輻射理論出發,推導出一維情況下ptr信號的振幅和位相表達式,討論了光熱信號的特性,介紹了一種用ptr技術測不透明材料熱擴散系數的優方法;接著研究分析了各向異性介質受調激光束輻照下產生的光熱信號,在理論上推導出各向異性介質的溫度場以及熱導並給予一定的實驗驗證。
  13. Because of the advantages of no range blind area, high range resolution, low signal power and simple structure, lfmcw ( linear frequency modulation continuous wave ) radar attracted more and more attention recently

    線性調連續波( lfmcw )雷達是一種通過對連續波進行調來獲得距離與速度信息的雷達體系統。由於其具有無距離盲區、高距離解析度、低發射功、結構簡單,便於集成等優點,適合用於液位測系統。
  14. It is one of the most important works to run economically in today and future. the system of electric control automation in zhao zhaou is open, it bases on the net of rs485 bus control and centrally manages substation by control the main machine. the system controls the run parameter of electric equipment and the run environment by using the computer measure, communication and automation technology, it can realize measure, communicate, control and allocate in the remote area, transmit data and control through collect data and automatic count parameter

    肇州縣電力調度自動系統是以rs485總線工業現場控網路為基礎,通過監控主機對變電站進行集中管理的完全開放式系統,該系統綜合了計算機、測、通訊和自動的專業技術來監控電力設備的運行參數、監控運行環境,通過對輸變電線路及設備的交流電壓、電流的數據採集,自動計算出功、電、功因數、等參數,實現四遙:遙測、遙信、遙控、遙調及數據傳輸和監控功能。
  15. Comparing with the traditional phase - shifted laser range finder, the method could implement the ranging with multifrequency by using single modulated frequency. it could not only solve the contradiction of the range and the precision, but has high degree of accuracy and wide range, simplify the hardware design, and reduce the cost. this paper introduced the theory of phase distance measurement, analyzed various testing methods and expatiated the hardware and the software for the proposal system

    與傳統的相位法測距相比,本方法使用單調實現了多測距,有效地解決了相位法測距中測程與測精度之間的矛盾,具有高精度、大程、大噪聲容限的特點,而且簡了硬體設計,降低了成本;其次在數據處理中採用數據加窗函數的方法,提高了方波信號的譜解析度,進而提高了測的精度。
  16. By simulating mathematically on frequency and on space, we can find the average speed of space field and the average speed of frequency field that is weighted by amplitude, and analyse their relation, and analyse the meaning of space speed variance x and frequency speed variance v. in the fourth part, how to ensure the height of cloud is introduced, and basing on the theory of wind field continuity, the height updating quality controlling is introduced. in the fifth part, the system of cloud wind is introduced, we tracked cloud - motion of consecutive satellite images with one - minute interval by the 1 - d fourier analysis technique and the two - dim fourier analysis technique and the fft analysis technique, and dispose them with quality controlling. in the sixth part, we summarized our research and put up with shortages of this article

    模擬模塊內各點的速度線性變時,得到空間域平均速度以及域以振幅為權重的平均速度,分析了空間域平均速度和域以振幅為權重的平均速度的關系,並揭示空間域的平均速度的標準差_ x和域的振幅為權重的平均速度的標準差_ v的意義,以及它們之間的關系;第四章介紹了雲跡風系統的高度指定以及風矢高度的劃分,並根據風場連續性原理,介紹了高度調整法的質;第五章介紹導風系統的流程,選擇了三個時刻的ir雲圖,分別用一維傅立葉相位法、二維傅立葉相位法和快速傅立葉演算法計算一個風場個例,並對所得風場進行質,並給出風場圖;第六章進行研究總結,指出不足和有待于進一步研究之處。
  17. In succession, the theory of chirped - pulse amplifier system is given in detail, firstly, studying from designing experimental light road and optical components to theoretical analysis, we par ' tly finished the system by ourselves. about ultr a - shoft pulse with a pulse - width of 9. 8f s and output power of 650mw and band - width of about l 20nm is output from oscillator source, secondiy, the stretching capacity of single grating four - pass stretcher is measured using abcd matrix combining collins function, and the effect of relativ e parameters to the streching ratio is also simulated. thirdly, a new type of disjunctional frequency moduiating function is provided according to the gain - narrowing and gain - saturation which are appeared in the co urse of amplification, under modulating the two effects are both controlled on some e xtent, fourthiy, the effect of ase that is often ignored by people is analyzed and the resolving methods are also given

    從光路、光學元件的自行設計到理論分析計算,初步建立了一臺實驗系統;採用abcd矩陣法結合collins公式計算了四通式單光柵展寬器的展寬,並模擬了相關參數對展寬比的影響,對實驗具有指導意義;評價了再生放大器和多通放大器的優缺點,對放大過程中通常忽略的放大自發輻射現象( ase )進行了分析,並提出了相應的解決方法;針對放大過程中出現的增益窄和增益飽和現象,對輸入種子脈沖提出了一種新的分段調函數,實現了對增益窄效應和增益飽和效應的共同抑;提出了系統的材料(包括放大介質和光路中的普通介質)正是融合高階色散的來源。
  18. Constant stator magnetic linkage control frequency converter includes power devices utilizing igbt, drive circuit using three - phase drive ic with multiple protection functions. pwm signal formation circuit in the way of voltage space vector control and realized with pld ( programmable logic device ) devices and compensation for the influence of supply voltage variation and stator resistance voltage drop

    其中,恆定子磁鏈控器的設計中主電路採用功器件igbt ;驅動電路採用三相多功能集成驅動晶元; pwm脈寬調信號產生電路採用電壓空間矢方式,由pld器件實現;對電源電壓變及電阻壓降造成的影響進行了補償。
  19. 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變器的特點提出了三種控策略對變流器進行控,通過變流器交-直-交的變換,將發電機發出的變變幅值交流電轉為可用的恆定的交流電,通過pwm調治能使其輸出功因數為一,並且該控系統功因數為可調,能在特殊情況下同電網交換一定的無功功,並通過對變流器的控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,採用先進的最大功俘獲演算法,能有效的從風中獲得最大的能
  20. We chose suitable tcp throughput model to estimate the available bandwidth correctly, using the estimated round trip time and packet loss ratio for the next time interval as parameters of the model to achive the accuracy of estimated network bandwidth. as the observed losses and round trip time vary very dynamically, adjust the sending rate equivalent to the amount of tcp throughput may result in a rather fluctuant sending rate. so we present a rate adjustment like tcp congestion control based on aimd, which increases its sending rate by an additive inereease rate

    根據mpeg4視流應用的特點,選擇合適的吞吐模型,進行合理的參數估計,並根據計算出的帶寬進行相應的速調整來實現擁塞控,我們使用未來rtt的估計值和分組丟失的估計值作為吞吐模型的參數,增強了控的實時性,弱了業務的振蕩性,提高了帶寬預測的準確性;在進行速調整時,不是簡單地將發送速調整到與tcp吞吐模型一致,而是採用類似tcp的aimd策略來調節發送速,減小了發送速的振蕩性。
分享友人