相對頻率 的英文怎麼說

中文拼音 [xiāngduìbīnlǜ]
相對頻率 英文
relative frequency
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 對 : Ⅰ動詞1 （回答） answer; reply 2 （對待; 對付） treat; cope with; counter 3 （朝; 向; 面對） be tr...
  • 頻 : 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 : 率名詞（比值） rate; ratio; proportion
  • 相對 : 1. （面對面） opposite; face to face 2. （非絕對的） relative 3. （比較的） relatively; comparatively
  • 頻率 : frequency; rate
  1. The relative frequency polygon has the same shape as the frequency polygon made from the same data set but a different scale of values on the vertical axis.

    根據同一資料繪制的相對頻率多邊形與頻率多邊形的形狀是相同的，只是縱軸上的標尺不同。
  2. Considering the similitude law for shaking table test, we study the test results and obtain some conclusions which are a ) generally, the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration, b ) when the intensity is on and above eight degree, the silty soil deposit will be liquefied dramatically, c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great, the relationship is represent as a concave curve, or else as a protruding curve and tends to stability. ( 3 ) based on the triaxial compression test and the resonant column test, some studies are made such as a ) the duncan - chang parameters of constitutive model, b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits. in order to deal with the test data, a computer program is compiled

    （ 2 ）利用小型振動臺進行了k _ 0固結狀態下粉土的振動液化模擬研究，通過分析正弦荷載作用下的試驗資料，驗證了粉土的孔隙水壓力增長模式的合理性；從微分方程推導了基於土體振動臺模型試驗的相似律，並從模型實體、孔壓時程曲線和相似律等方面做出了分析，得出了如下結論：在小型振動臺試驗中，模型箱中的粉土都發生了液化，液化的時刻和輸入加速度幅值有關，而對頻率的變化不太敏感；粉土在相當於8 9度地震烈度的加速度幅值作用下可能產生嚴重的液化；孔壓的增長曲線形狀與施加的荷載有關：當施加荷載為由小到大的形式時，曲線形狀為上凹的曲線；當施加荷載為等幅的正弦荷載或荷載幅值由大到小時，曲線形狀為上凸的曲線，且逐漸趨于穩定。
  3. For digital audio encoding and decoding modules, delta - sigma modulation is introduced and audio data, preambles with accessorial data are multiplexed according to the digital audio interface standard ; for carrier wave, pll frequency synthesizer is used ; for frequency modulation, voltage control oscillator is taken ; for demodulation, pll frequency discrimination is adopted

    調制方式，並按照數字音頻介面標準對音頻數據、同步字和附加信息進行通道復用;對于載波信號，採取鎖相環頻率合成技術手段;對于頻率調制，採用壓控振蕩器;對于解調電路，採取鎖相環鑒頻電路。
  4. According to the theory of digital signal processing, discrete fourier transform has selectivity to frequency just as spectrum analyzer

    根據數字信號處理理論，離散傅里葉變換（ dft ）演算法對頻率具有選擇性，有相當于頻譜儀的功能。
  5. The design tried to develop high performance frequency synthesizers especially fine resolution and low phase noise frequency synthesizers

    本次設計是對高指標頻率合成器特別是小步進低相噪頻率合成器研製的一次嘗試。
  6. There is difference frequency measurement requirement for every part of pid regulating, difference between dynamic quality and static quality in response time and accuracy. according to these, it use the interrupt functions and high - speed counter of the simens s7 - 200 plc cpu226 basic unit and some peripheral circuit to measure frequency ; in software designed, the procedure frame of hydraulic - turbine governor and disperse process of parallel pid are analyzed, an improved pid algorithm is adopted to realize a pid regulation mode with variable structure and parameters ; the mechanical liquid - pressure system of the hydraulic - turbine governor is with electric - hydraulic converter unit of step motor. according to the drive character of five phase of response step motor, a variable frequency regulated voltage driver unit is designed in order to realize interface between plc and driver of step motor

    本文利用s7 - 200plc自身的特點設計了頻率測量單元，根據pid調節各個環節的特點，以及調速器動態特性、靜態特性對頻率測量的實時性和精度要求的不同，利用s7 - 200plc基本單元中內置的高速計數器以及相應的外圍放大整形、分頻電路，實現了水輪發電機組頻率的測量；在軟體上，對微機調速器的整個程序框架、並聯pid的離散化過程進行了分析，選用改進的pid演算法實現了變參數、變結構的pid調節模式；調速器的機械液壓隨動系統具有步進電機電液轉換元件，採用五相反應式步進電機，根據其驅動特性設計了變頻調壓驅動器，實現plc與步進電機驅動器之間數字介面。
  7. The cable sag and bending stiffness effects are studied on the higher natural frequencies of cable vibration. it is found that the differences of the higher adjacent frequencies go to the fundamental frequency of the taut string theory even though the cable sag or bending stiffness is included. this unique characteristic of cable vibration is used to determine the cable tension with the well - known taut string theory

    2 .考慮垂度和抗彎剛度對高階自振頻率的影響，探討了索相鄰頻率之差，發現索的高階頻差就是弦振動理論的基頻，利用這一特性，分析了頻差法測索力的精度和適用范圍。
  8. Abstract : we have studied the polarization beats spectroscopy with phase - conjugation geometry in a cascade three - level system. it was found that the accuracy for the energy - level difference measurement is determined by the homogeneous linewidths of the optical transitions. under the condition for the occurrence of beating, the frequency difference of the beat between two independent light sources could exceed the laser linewidth. the measurement accuracy for laser absolute frequency could reach the same order of magnitude as the laser linewidth

    文摘:研究了級聯三能級系統中的相位共軛極化拍頻光譜術.發現其對能級差的測量精度決定於光學躍遷的均勻增寬.在符合拍頻條件時，兩獨立光源拍頻的頻差可以超出激光線寬，激光絕對頻率的測量精度可達到與激光線寬同一量級
  9. The conclusion is identified by computer simulation. the paper studies a noncoherent demodulation based on differential encoding in mc - cdma system and makes computer simulation of ber performance compared with that of coherent demodulation based on perfect channel estimation

    研究分析了一種使用差分編碼的非相干接收mc - cdma系統，對頻率選擇性瑞利衰落通道條件下的誤碼率性能進行了計算機模擬，並且和基於理想通道估計的相干解調方案進行了比較。
  10. In statistical language, we would say that the relative frequency become stable as the number of tosses becomes large(if we are tossing the coin under uniform conditions).

    用統計學的語言來說就是隨著拋擲增加（假定拋幣條件不變），相對頻率越來越穩定。
  11. The following algorithms have been proposed and tested in the thesis : 1 frequency selective fading : combine the isomorphism between the input space and the output space and propose a new approach to blind equalization of the channel. compared with conventional methods, the new approach offers lower computational complexity, better performance, and more robust against the over - determination of the system order ; 2 time selective fading : a new approach to the equalization of time selective channel based on the zero - forced equalizer is proposed which is more simple in its structure of algorithm ; 3 time - varying channel : using the instantaneous mean value changes of the output signal to extract the information of channel variations and model it using ar model, kalman filter is then employed to track channel variations, it bears faster ability in tracking the variation of tv channels ; based on the isomorphism between the inputs and the outputs and some of the approaches using in mimo system, a new algorithm of equalization of simo time - varying channel is proposed, which also share the merits of being robust against the over - determination of the system order ; model the time - varying channel using the multi - resolution decomposition wavelets, and then a blind identification method based " on the model is proposed ; at last, a new model for equalization and identification of mimo system is proposed

    主要工作在以下幾個方面： 1 、針對頻率選擇性衰落通道：結合輸入輸出空間同構關系提出一種新的頻率選擇性通道均衡方法，與傳統方法相比，該方法計算量更小，收斂速度更快，性能更優，且對系統階次的過確定表現穩健，具有實際均衡應用價值； 2 、針對時間選擇性衰落通道：提出一種基於迫零均衡的時間選擇性通道均衡方法，演算法結構簡單； 3 、針對時變色散通道：利用瞬態均值曲線提取通道時變信息，對之ar建模，利用卡爾曼濾波器跟蹤時變通道抽頭變化，可以快速跟蹤通道變化；基於輸入輸出空間之間的同構關系以及多輸入多輸出系統的處理方法，提出了新的單輸入多輸出色散時變通道均衡與識別演算法，同樣具有對通道階次過確定保持穩健的優點；結合小波多解析度分析提出一種基於小波模型的通道盲識別演算法；研究時變的多輸入多輸出系統的盲均衡與盲反卷積問題，給出一種時變系統處理模型。
  12. 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。
  13. It really provides convenience to evaluate and optimize the design result. 3 ) vibration analysis has been fulfilled by calling some math libraries and graphic libraries in matlab to plot graphics such as velocity - time, displacement - velocity, step response, impulse response, gain - frequency and phase - frequency. we can know the capabilities of the spring system from the graphics

    3 、在matlab環境下調用相應的數學函數庫和圖形庫對設計的彈簧進行分析，繪制彈簧加載后系統的速度-時間響應曲線、速度-位移響應曲線、階躍響應曲線、脈沖響應曲線、增益-頻率響應曲線和相角-頻率響應曲線，根據曲線來分析系統的各項性能。
  14. Frequency source is widely used in today ' s electronic equipment and even refered as " a heart " of many electronic systems. the frequency synthesizer with a lot of channels and high frequency stability by means of theory of phase locking has almost been a necessary component in the modern electronic systems such as telecommunication, radar and electronic countermeasure. the phase - locked frequency synthesizer can be generally divided into two kinds : one is digital phase locked frequency synthesizer, the other is analog sampling phase locked frequency synthesizer. compared with the prior, the latter has many merits such as lower phase noise, samller volume, lighter weight and lower power consumption and has a wide foreground in the equipments of microwave band

    利用鎖相原理來獲得波道數目眾多、頻率穩定度很高的頻率合成器，幾乎已成為現代通信、雷達和電子對抗等電子系統不可缺少的組成部分。鎖相式頻率合成器一般分為數字鎖相頻率合成器和模擬取樣鎖相頻率合成器兩類。取樣鎖相頻率合成器與數字鎖相頻率合成器相比，具有相位噪聲低、體積小、重量輕和功耗低等優點，尤其在微波波段的電子設備中，具有廣闊的應用前景。
  15. In modern microwave and millimeter wave communication systems, the low phase noise frequency sources have the key effects in the systems ’ performance. especially in the national defence, the effects are more obvious. so in this paper, a method to realize the low phase noise x - band frequency source has been proposed, designed, produced and tested

    在現代微波、毫米波通信系統中，低相噪頻率源對系統性能起著非常關鍵的作用，特別是在軍事國防上，這種關鍵的作用更加明顯，為此在本論文中，就如何實現x波段頻率源的低相噪性能，給出了一種設計方法並對其進行了實現。
  16. In statistical language, we would say that the relative frequency become stable as the number of tosses becomes large ( if we are tossing the coin under uniform conditions )

    用統計學的語言來說就是隨著拋擲增加（假定拋幣條件不變） ，相對頻率越來越穩定。
  17. Then a algorithm of phase shift estimate is designed, and simulate. 5

    4 .詳細研究了在存在相移的情況下，對頻率估計的影響。
  18. Analyzing real hrv, proving the every segment power ( high frequency > low frequency ) of projection in frequency axis is times with the every segment power by using fft, the lf / hf by using 2 method is primarily sameness. 3d figure is a trenchancy tool for doctor to look over the relation between time and frequency

    對實際的心率變異信號進行了維重慶大學碩士學位論文格納分析，證實通過計算三維時頻分佈對頻率軸的投影得到的各頻段（高頻段、低頻段等）功率，與直接用fft所得各頻段功率，二者只相差一個比例系數，並且二者lf hf的值基本相同。
  19. Finally, the production, which is designed and debugged all by myself, c band fine resolution low phase noise frequency synthesizer was introduced by module, including respective schedule, frequency distribution and phase noise experiment results. then whole circuit phase noise result, picture of spectrum with spur were presented, by which above theory was proved, analysis of the result was given, and the existing problem as well as methods to resolve it were motioned

    論文最後對自己設計調試的樣機c波段小步進低相噪頻率合成器進行了分模塊介紹，包括各部分的原理框圖、頻率分配和相噪測試結果，然後給出了整個樣機的相噪、雜散頻譜測試結果，對上面提到的理論進行驗證，並對結果進行了討論分析，提出了樣機現存的一些問題和幾點解決措施。
  20. This article gets some good results on the two - order markov chains on the base of the studies of one - order markov chains : in infinite experiment, the frequency of times of stationary state is accessing to transition probability. the indication function which is the times of appearance is a special function, so this paper in forth chapter continue to study more general function regarding to two - order markov chains, which is the property of the function of two - order markov chains. in chapter five, this paper study the convergence of cesaro averages for two - order morkov chains

    在大量試驗中，固定狀態出現次數的相對頻率可以用條件概率來加以說明，它是對一重馬氏鏈強極限性質的一個推廣；本論文進一步引入了有關二重馬氏鏈更廣泛的函數即二重馬氏鏈泛函，並研究了其強極限的性質；最後研究了二重馬氏鏈泛函的平均收斂性。
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