調制系數 的英文怎麼說

中文拼音 [diàozhìxìshǔ]
調制系數 英文
coefficient of modulation
  • 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...
  • 制 : 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...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Next analyzed were the characteristics of natural gas pipeline transmission ; cost, ratemaking principle, method of acquiring the pipeline transmission fee, constitution, calculate, management and control after that, wt ; compared service cost methods with economic evaluation methods and the one - part pricing method with the two - part pricing method. later on was introduced the regulate coefficient of pipeline transmission fee structure, established the modificatory two - part pricing method, and found out a natural gas pipeline transmission pricing method that is fit for china ' s current situation. finally, we validated the rationality and applicability of this metho j by the demonstrational analysis on the natural gas pipeline transmission price of " the gas transmission from west to east " pipeline this paper ' s research fundamental is : the fundamental of natural gas pipeline transmission pricing should reflect the characteristics of natural gas pipeline transmission

    本文首先論述了自然壟斷行業的價格理論，然後分析了天然氣管輸的特點、定價原則及管輸費的收取方式、成本、構成、計算及其管理與調控；在此基礎上比較了中外天然氣管輸定價的服務成本法與經濟評價法，一部制定價法與兩部制定價法等；針對目前我國天然氣管道運價的制定現狀，本文深入研究了國際通用的天然氣管輸定價方法，引入「管輸費結構調整系數」的指標，建立修正的兩部制定價方法，找出了一套適合於我國當前國情的恰當的天然氣管輸定價方法，並通過「西氣東輸」管線加以實證分析，驗證了方法的合理性和適用性。
  2. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。
  3. 1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %

    從功率單向流動角度出發，提出了一種lcc諧振型恆頻移相單相高頻鏈逆變電路拓撲，在調制系數0 . 1 m 0 . 5情況下，控制移相角按正弦規律變化，使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號，經過整流、濾波、低頻逆變，從而獲得正弦度較好的輸出電壓。理論分析和實驗結果證明對于阻性負載或阻感性負載，移相全橋具有超前橋臂零電壓開通，滯后橋臂或者零電壓開通（ _ 0 ）或者零電流關斷（ _ 0 ）的軟開關特性，而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。
  4. Successive linear programming is proposed to solve it with the help of lindo6. 1 program. digital tests are carried out and results show that the algorithm is practical and efficient for distribution systems loss minimization and can be used to optimize real distribution system operation

    在求解過程中，結合了線性規劃模型演算法程序lindo6 . 1 ，並引入迭代步長控制系數k ，對控制變量的增量作有效的調整，同時，選取就地無功平衡點作為迭代初值。
  5. Spectral gain narrowing compensation modulation function in high - power ultrashort - pulse laser systems

    高功率超短脈沖激光系統中光譜增益窄化補償的調制函數
  6. Chapter 2 treats the design of digital phase modulation system in frequency hopping mode communication

    第二章說明了跳頻傳輸模式下數字相位調制系統的設計。
  7. By simulating, this paper compared the effect of capacitor compensation to that of svc compensation, the results showed that capacitor compensation add the voltage flash, and svc was the optimal equipment to restrain the flash. furthermore, the smaller value of ks and tf, the better effect of svc

    通過數值模擬曲線分析，對比了電容補償和靜止無功補償器（ svc ）補償的效果，得到的結論是電容補償有擴大閃變的影響，而靜止無功補償器（ svc ）是抑制閃變的最佳裝置，並且調差系數ks和時間常數t _ f越小， svc補償效果越好。
  8. It is found that the electron beam may approach ideal bunching. high power microwave pulses with tunable frequency can be generated by post - accelerating the electron beam and carefully designing the extraction cavity. in terms of the pic simulation, the output power of 1. 25gw at 2. 2ghz and 480mw at 4. 4ghz in axial acceletron have been obtained

    用增加中間腔的辦法，大大提高了前兩階諧波電流分量，數值計算結果表明，其中一階諧波電流調制系數達到了140 ，二階諧波電流調制系數達到了68 ，通過改變提取腔的設計，可選擇不同頻率的輸出，其一次諧波頻率為2 . 2ghz ，輸出功率為1 . 25gw ，效率為9 . 33 ，二次諧波頻率為4 . 4ghz時，輸出功率為0 . 48gw ，效率為3 . 6 。
  9. The algorithm have the good one - way property, high sensitivity to initial values and good security due to the intrinsic characteristic of chaotic system and rijndael algorithm. the simulation experiment demonstrates the convenience and good hash performance ; 3 ) a new scheme of digital voice secure communication was proposed based on chaotic modulation without additional synchronization. the modulation sequence generated by chaotic logical mapping was used to encrypt the digital voice signal

    混沌系統和rijndael演算法的固有特點使該演算法具有較好的安全性、對初值有高度的敏感性以及較好的單向性能，並且易於實現，是一種有效的單向hash函數； 3 ）研究了一種無需同步的基於混沌調制的數字語音保密通信系統的方案，利用邏輯映射產生混沌調制序列，以該序列作為密碼對數字語音進行加密處理，為了更好的隱匿信號特徵，混沌調制在小波分解的基礎上，對不同的通道使用不同的參數進行，並借鑒混沌掩蓋對信息信號進行了限幅處理，使密文完全隨機化。
  10. Two generating methods of compensation current are also proposed for the purpose of eliminating detuning or limiting harmonic voltage contents, in which the compensation current is the weighted superposition of filter harmonic currents or voltages and the regulating factor

    針對消除失諧或限制諧波電壓含量的不同控制目標，提出了諧波磁通補償電流的兩種生成方法，補償電流分別是濾波器電流或母線電壓中各次諧波分量與調節系數的加權合成。
  11. A novel topology of dc - rail zvt voltage source three - phase pwm inverter is advanced. the principle, design considerations, modulation index and efficiency of the proposed inverter are discussed in detail

    提出了一種新型直流母線零電壓過渡電壓源三相pwm逆變器，並對該電路的工作過程、參數設計、調制系數以及工作效率等進行了詳細的分析和試驗研究。
  12. The numerical results of the dispersion relation show some nonlinear effects : for a fixed geometry of a waveguid, beam parameters and plasma density, the increment of the modulation parameter may lead to a slight increment of the operating frequency, however, as the modulation parameter increases further, saturation may occur and the dispersion relations are hard to be separated, it is due to the overmodulation of the microwave power, this phenomenon itself belongs to the nonlinear effects

    對於一定的波導、電子注參量和等離子體密度值，等離子體調制系數的增加，使工作頻率略微升高。但是，隨著等離子體調制系數的進一步增加，色散曲線變得彼此之間不可分辨，可以認為是等離子體的過調制導致了柵的飽和。這一現象是非線性的，可見，等離子體柵和調制場中文摘要是非線性關系，等離子體柵是非線性j 。
  13. At last, with the program, 18 one - storey and one - span prestressed frames are simulated. some conclusions are reached with the taking into account the, secondary moment and types of load applying : ( 1 ) the in the beam affects the ductility of the section and rotary property of the plastic hinge. so total coefficient of the modulation of moment becomes less with the becoming bigger

    最後，本文利用編制的非線性程序，模擬了18榀單層單跨預應力框架，重點研究截面相對受壓區高度、次彎矩、加載方式對塑性內力重分佈和彎矩調幅的影響，從中得出了以下主要的結論和規律： （ 1 ）框架梁相對受壓區高度在很大程度上反映了截面的延性，體現了塑性鉸的轉動能力，框架的總彎矩調幅系數隨著相對受壓區高度的增大而減小。
  14. 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量，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化和增益飽和現象，對輸入種子脈沖提出了一種新的分段頻率調制函數，實現了對增益窄化效應和增益飽和效應的共同抑制；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。
  15. But the spectrum efficiency of the traditional ofdm system is limited due to variance of channel parameters such as channel response and rms delay spread

    但是，決定通信系統調制參數的通道響應和rms時延擴展由於物體的運動或者環境的變化而動態變化，傳統的靜態確定ofdm系統調制參數的方法的頻譜效率不夠高。
  16. Meanwhile i give analysis method of constellation map. to update system, system optimization direction is taken as the most important thing, such as choice of modulator parameter, reduce power dissipation, improve circuit work frequency,

    同時給出星座圖分析說明;最為重要的是提出系統優化的方向，如調制參數的選擇、如何降低功耗、如何提高電路工作頻率，為系統的升級做了規劃。
  17. 3. in order to show the fact that the - licrowave modulates the background plasma density and the density grating influences the propagation of the microwave in return, the dispersion relation of the dielectric cerenkov maser filled with plasma grating is derived when the modulation parameter is varied

    三、為了反映等離子體被微波場調制從而形成密度周期性分佈的等離子體柵，反過來影響電磁波的傳播這一物理事實，在調制系數變化的情況下，從等離子體柵的等效模型出發，推導了等離子體柵填充的介質cerenkov脈塞的色散方程。
  18. Digital modulation is a important part of slltv, and it must meet the demond of slltv. the accomplishment of digital modulation greatly improves the performance and function of slltv, and it greatly promotes slltv research

    而數字化調制系統的完成極大地提高了激光電視的性能和功能，有力地推動了《半導體激光大屏幕彩色電視》項目的研究。
  19. Finally, the relation between the field of view matching of digital binoculars and the size of field of view of binoculars and camera is analyzed theoretically. based on the analysis of the mft principal and measure method of image sensor ’ s mtf, the contact measure method using rectangle template for mtf of image sensor is created. according to the number of pixels of image sensor in one cycle of the template function, the quantitive relation between sine template and rectangle template is proposed through theoretical analysis and comparison

    並利用衍射理論，從模板的形式（正弦形、矩形） 、模板與傳感器間距等幾個關鍵因素出發，進行了深入的理論探討，從理論上導出了矩形模板和正弦模板的差異、模板與圖像傳感器光敏面存在間距的情況下的光場分佈;並最終導出了間距存在下圖像傳感器調制傳遞函數值測得值與標準值之間的調整系數，利用此調整系數對實驗數據進行修正後可得到更為準確的調制傳遞函數。
  20. Recently, frequency - hop communication has been widely used in many military wireless communication domain as a secure transmission mode. in frequency - hop transmission, phase modulation system has good performance and high frequency efficiency

    跳頻傳輸模式下的數字相位調制系統具有較高的抗噪聲性能，且能有效地利用頻帶，實現數據的高速傳輸，是一種比較優越的調制方式。
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