frequency harmonics 中文意思是什麼

frequency harmonics 解釋
諧和頻率
  • frequency : n. 1. 屢次,頻仍,頻繁。2. (脈搏等的)次數,出現率;頻度;【物理學】頻率,周率。
  • harmonics : n. 【音樂】和聲學。
  1. A building of high, the breadth, long comparison is very important. house for combination in an ideal of big set, reruns hour then contain the best frequency to respond to the width. frequency response range in other words, the combination can broadcast tallest to can also fully develop to the lowest frequency, and the equilibrium degree is as well high, and halt a circumstance is very tiny. the first glint wave primary reflection mutual interference for with wave secondary reflection of many glints the degree is not to result in confusion. combination that fundermental the diapason wave harmonics is again perfect

    大套組合在一間理想的房子里,重播時便有最佳的頻率響應寬度frequency response range 。換句話說,組合所能播放的最高至最低頻率也可以盡情發揮,平衡度亦高,駐波情況極微。第一反射音波primary reflection和多次反射音波secondary reflection的互相干擾情度不至造成混亂。
  2. Furthermore, with the fourier series technique, the disturbance is discomposed into predominant mode and high frequency harmonics, and the nonlinear stability of the nonparallel boundary layer is studied

    採用fourier級數的方法把擾動波分解為基本模態和高頻諧波模態,導出非平行非線性拋物化穩定性方程。
  3. With the fourier series technique, the disturbance is discomposed into predominant mode and high frequency harmonics. the nonlinear stability of three - dimensional disturbances for the blasius boundary layers is studied

    藉助fourier級數的方法將擾動波分解為基本模態和高頻模態,研究了三維擾動的非線性邊界層穩定性問題。
  4. These stray currents usually have a higher frequency (50-60h2 harmonics) than those used in the ip frequency technique.

    這些游散電流的頻率(5060H2及其諧波)通常比IP頻率域法中用的頻率要高。
  5. Two - dimensional harmonics frequency estimation in additive gaussian noise background based on quaternion and hypercomplex

    四元數和超復數在加性高斯噪聲背景下二維諧波頻率估計中的應用
  6. Because massive harmonic interference in the electrical network, it causes signal - sampling to include the very big harmonic in the measurement system, for eliminating measurement result influence by harmonic, the paper has an in - depth study of fourier transformation harmonics analysis measurement principle, analysis the forming reasons of frequency spectrum leakage and railing effect during measurement, achieves phase locked loop and frequency multiplier technique to realize integer - period synchronous sampling and eliminate impact of frequency spectrum leakage and railing effect in the result of measurement, and investigates in depth theory on phase locked loop and frequency multiplier technique, gives the method of realizing phase locked loop and frequency multiplier technique

    由於電網中存在大量的諧波干擾,導致測量系統中取樣信號也含有很大的諧波,為了消除諧波對測量結果的影響,論文深入研究了傅立葉變換諧波分析法的測量原理,分析了測量中頻譜泄漏和柵欄效應形成的原因,提出了採用鎖相環倍頻技術實現信號的整周期同步采樣,消除頻譜泄漏和柵欄效應對測量結果的影響,並對鎖相環倍頻技術的理論進行了深入研究,給出鎖相環倍頻技術的實現方法。
  7. Abstract : it provides a kind of new nonlinear integrator and its mathematical model. its frequency responses is disscussed by the harmonics linearization method. its phase lag is found to be only 27. 6, all high order harmonics are very small, and it is very resistant to disturbances. by using it, an two - objective optimum control system is designed. it has very good control performances and will have good prospects in application

    文摘:提出一種新型的非線性積分器,給出它的數學模型,並用諧波線性化原理討論它的頻率特性,其幅頻特性起積分作用,而相位滯后僅27 . 6 ,高次諧波分量小,抗干擾能力強.應用這種積分器設計了一個雙目標優化的二次優化系統.模擬結果表明,系統的控制性能好,具有廣泛的應用前景
  8. Harmonic method : the representation of tidal variations as a sum of harmonics known as constituents each of different frequency, amplitude and phase

    調和法:將潮汐變化分解為不同頻率,振幅和相位角的諧波(即分潮)的方法。
  9. This paper makes a science analysis to power system " s harmonics and harmonic oscillation in partial power net, develop the analysis software of harmonic oscillation characteristic. make use of this software can obtain the harmonic oscillation characteristic curve in a row frequency range, can discover accurately oscillation, can make an in - depth analysis and statistics and renew the realistic curve of voltage or current on the basis of the measured - data

    本文通過對電力系統諧波及局域電網諧波諧振現象的理論分析,設計、開發了局域電網諧波諧振特性分析軟體,利用該軟體可以獲取連續頻域內的諧波諧振特性曲線,發現準諧振區域,而且還能根據實際測試數據,正確統計分析出所要求的參數,同時能夠恢復電網實際的電壓、電流波形,並能根據國家標準自動生成分析報告。
  10. To reduce the harmonics in the line current, the random pwm mode is adapt. related to the typically constant pwm carrier frequency and its high harmonics, modulation of this frequency can be used to decrease emi and cost no more gain

    為了抑制輸入電流中一些幅值較大的諧波成分,利用dsp控制的特點,電路採用了隨機pwm方式,在不增加系統成本的前提下,有效地抑制了輸入電流的高次諧波含量。
  11. Harmonics can be added to a wave which has a single frequency to produce a complex wave.

    諧音加在單頻波上產生復波。
  12. Non - periodical time function consists of time harmonics with continuous frequency spectrum

    非周期時變由連續頻譜之弦波所構成。
  13. 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頻鏈逆變器結構和控制的復雜性,提出了一種實現簡單而整體優化的vvvf控制策略:將空間電壓矢量產生p姍的方法svm和等效載波頻率fe = 1 / te引入到周波變流器的pdm控制;按高頻電壓脈沖前後沿軟化等效p翎波;用移相調節高頻脈沖寬度和等效p姍調壓協調控制逆變器輸出電壓,在滿足輸出電壓條件下使諧波最小。
  14. Abstract : applying the frequency - domain representation of the complex signals in a three - phase system, a harmonic detection method based on the in - phase correlation filtering was put forward in this paper, which can be used to detect effectively the generalized harmonics in the three - phase system except the fundamental of positive sequence

    文摘:採用三相系統復信號的頻域表示並根據頻譜搬移原理,本文提出了一種基於同步相關濾波的諧波檢測方法,可用於三相電路中除正序基波以外廣義諧波的有效檢測。
  15. Also a prototype for the boost two - level converter is built. the experimental results show that the boost tl converter has lower input current harmonics than the boost two - level converter, and it can satisfy the limits specified in rtca do - 160d. so the boost tl converter has the potential to apply in the future variable frequency ac airborne system ranged from 360hz to 800hz

    並完成一臺boostpfc變換器進行實驗對比,實驗結果表明,相比于boostpfc變換器, boosttlpfc變換器能有效地減小電流諧波使其滿足相應的諧波標準rtcado - 160d ,所以它適合於即將採用360hz - 800hz變頻交流供電體制的航空電網。
  16. The widely applications of nonlinear instruments have produced many high order harmonics, they are flowing into the power network and greatly influence the quality of electric power. and the frequency is n ' t constant but changed around 50hz

    電網中非線性設備的使用日益增多,所產生的高次諧波電流大量注入電力線路中,使得電網電壓、電流波形發生畸變,同時電網頻率並不是固定不變的,而是在50hz附近波動。
  17. An algorithm that can extract harmonics " amplitudes using morlet wavelets is put forward. compared with the full - wave fourier algorithm, the algorithm proposed in this article is more stable when the frequency of electric network flutters. meanwhile the algorithm has the rapidity of giving out the

    在電網頻率波動情況下,通過比較說明短窗morlet復小波演算法在頻率波動過程中具有比傅氏演算法更穩定的特點,同時也可以達到1 3周波內完成的快速性。
  18. At the same time, with the rapid development of electric power industry, stabile power quality issues, such as voltage fluctuation and flicker, frequency fluctuation, harmonics, have increasingly captured considerable attention from utility companies and their customers

    同時,隨著電力工業的快速發展,穩態電能質量問題如電壓波動、頻率波動、諧波等,已經引起了足夠的重視。
  19. Flow separation produces pressure fluctuations of large amplitudes, possibly with the dominant frequencies differ from up - stream blade wake passing frequency and its harmonics

    尾緣氣流分離產生的壓力波動頻譜中含有上游葉片尾跡頻率及其倍頻的分量,但其頻譜可能比較復雜,並非單一地受上游葉片尾跡影響。
  20. In order to get suitable algorithms which are accuracy, feasible, practical and convenient to be realized by virtual instrument, this paper firstly analyzes measuring algorithms of major power quality parameters, such as voltage, current, frequency, harmonics, flicker, unbalance factor etc. then two algorithms, the one for basic power quality parameters measurement based on spectrum correction and the other one for flicker measurement based on fft, are presented

    基於虛擬儀器技術的電能質量測試儀應用靈活,升級方便, 「軟體就是儀器」的特色使測試儀各種通用功能和預期功能的方便實現成為可能。文章對電能質量的一些主要指標:電壓、電流、頻率、諧波、電壓波動和閃變、三相電壓不平衡度等的測量演算法進行了分析,尋求適合虛擬儀器實現的,切實可行、計算精確、實用性強的計算方法。
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