頻率變化 的英文怎麼說
中文拼音 [bīnlǜbiànhuà]
頻率變化
英文
frequency change-
In the next place, by studying the change of the resonant frequency of the whole system, this paper designs the circuit to track the resonant frequency of the system by cd4046 mainly. at the same time, in order to improve the efficiency and get better dynamic capability of the converter, we choose pll and fuzzy control after comparing the pll circuit, fuzzy circuit and pll ? fuzzy control circuit. in the end, this paper brings forward the control blue print to realize the drive control circuit of the high frequency converter, using the dsp chip as the key part to realize four routes of pwm drive pulses with dead band of the control system
其次，通過對整個系統諧振頻率變化的分析和研究，設計了以鎖相環cd4046為核心的鎖相環控制電路，同時，在綜合比較鎖相環控制、模糊控制以及模糊控制和鎖相環復合控制三種控制演算法的基礎上，進行了系統模擬，得出採用復合控制可使跟蹤電路既具有鎖相環路較好的穩態性能，又擁有模糊控制較好的動態性能，系統魯棒性能好，同時也提高了逆變器的效率。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
且表現出很強的頻率調制特性和特有的幅度調制特性，相對的音節時程比較長，基頻較高且頻率變化范圍較大，所特有的幅度調制特性更增加了其控聲的能力，但其音節的種類仍很單一，缺乏變化，由音節所組成的句型較少，音調變化幅度不大，因此，其叫聲質量盡管較非鳴禽有所改善，但相對鳴禽而言卻又遠遠不如。Microscopic mechanism of moments of inertia and odd - even differences for well - deformed actinide nuclei
錒系變形核轉動慣量及奇偶差隨角頻率變化的微觀機制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。This paper proves that the changes of pre - compression on the windings have effects on their natural frequencies and derives their relation, which provides the experimental and theories foundation for fault diagnosis of large - scale electric transformers
通過對大型變壓器繞組進行振動實驗和根據建立的變壓器繞組軸向振動數學模型的理論推導，闡明了變壓器繞組預緊力的變化與其固有頻率變化之間的關系，這為大型變壓器的故障診斷提供了理論與實踐依據。Pll has the excellent narrow - band - tracking - filtering characteristic. in this scheme, we combine the merits of dds and pll
該方案是將dds的高解析度、高精確度、頻率變化易於控制的優點與pll良好的窄帶跟蹤性能相結合。A novel communication receiver which uses lapped transform ( lt ) incorporating modified median filter ( mmf ) algorithm is designed for narrow - band interference excision. the lt domain mmf algorithm takes full advantages of the direct sequence spread spectrum signal, as well as the characteristics of lt, performing the transform domain filtering twice. the first filtering locates the position of interference and mitigates most of them. the second filtering is performed in a small neighborhood of the located interference. so lt domain mmf algorithm can completely mitigate the interference without distorting the desired signal. simulation results demonstrate the improved ber performance and increased robustness of our receiver
本文採用改進的重疊變換域中值濾波演算法進行變換域抗干擾處理.該演算法既考慮到直接序列擴頻信號的特點，同時又利用重疊變換的特性對變換域系數進行了二次濾波.該演算法節省處理時間，並且不需要有關干擾的先驗知識，系統性能不會隨干擾頻率變化而變化，因而是一種很穩健的處理方法Methods of structural damage detection based on frequency change
基於頻率變化的結構損傷識別方法More attention is paid to the starting response of the motor, considering the effects of the different start positions, the parameters of the motor and the frequency changes of the source
文章著重分析了電機的起動過程，討論了不同起動位置、電機的參數以及電源的頻率變化時對電機起動的影響。Compared with the induction meter, the electronic meter ' s measurement error is affected diminutively by the change of the frequency, that is to say, the electronic meter has a wide frequency respond characteristic and its error - frequency characteristic curve is flat. therefore, taking the whole energy as measurement standard, the measurement error of electronic meter is less than that of induction meter very much ; while the measurement error of electronic meter is bigger than that of induction meter when taking the basic energy as measurement standard
和感應式電能表相比，電子式電能表的計量誤差受頻率變化影響較小，具有較寬的頻率響應，誤差頻率特性曲線較為平坦，因此，在諧波存在下以全能量為計量標準時，電子式電能表的計量誤差遠遠小於感應式電能表的電能計量誤差，而以基波能量為計量標準時，電子式電能表的計量誤差比感應式電能表的計量誤差大。Stationary phase method shows that by using information along the ridge defined by the phase on transformed domain, original signal could be represented and reconstructed
利用穩定位相法的近似公式分析可知，脊上分佈參數包含的信息與信號瞬時頻率變化規律密切相關，並且可以用來對信號進行重建。But for the furnace cooling samples, all samples have another damping peak about at 3 00 ( called tp2 peak ). the peak is not of relaxation model, the peak temperature does not vary with frequencies
除爐冷試樣外，其餘各熱處理態試樣均在300左右，有一內耗峰幾2峰，此內耗峰無馳豫特性。頻率變化，內耗峰的位置不變，對同一熱處理態試樣內耗峰位置不變。Abstract : enhancing function of pulsating draught for sintering process is studied with simulative burden in the laboratory. the experiment results indicate that sintering velocity is the fastest along with appropriate pulse draught frequency when negative pressure is lower
文摘:採用模擬原料，在試驗室內的脈動燒結裝置上，進行脈動氣流燒結試驗，探討了脈動氣流的頻率變化和抽風負壓等因素對燒結過程的強化作用The possible influence of the global warming to storm surge frequency has been one of the concerned questions at present for researchers. some of them consider that the frequency will increase according to the results of observation and simulation, but some others do n ' t agree to it. to verify the speculated conclusions, the coastal storm surge frequency in middle jiangsu province during the warm period of middle holocene is discussed in this thesis
風暴潮頻率在全球氣候變暖后的可能變化已引起了廣泛的關注，而目前研究者們通過模擬與觀測所獲得的結論並不一致，基於此，本文從地質時期氣候冷暖變化與熱帶氣旋頻率變化之間的關系對這一問題作了驗證與探討。The experimental results show that the method can accurately extract variable amplitude and frequency order in time domain, and is suitable for vibration response character extraction of rotating machinery
實驗結果表明，該方法能夠在時域中準確地提取幅值和頻率變化的階比，適合於旋轉機械振動響應特徵提取。Transient state frequency variation
動態頻率變化率Frequency variation rate
頻率變化速率The wrap - up ratio is the ratio of the sine of the maximum scan angle to the percentage change in frequency required to scan
綜合比率是最大掃描角的正弦與所需的頻率變化百分率之比。Having the excellent electrical performances, low losses and a capacitance of a slight variation with both temperature and frequency
電性能優良，損耗小，電容量隨溫度和頻率變化小。According to the laser gain change is linear related to the frequency shift, the doppler frequency is extracted by the signal processing
根據激光的增益變化和頻率變化成線性關系，可以對信號進行處理求出多普勒頻移。分享友人