high-frequency distortion 中文意思是什麼

high-frequency distortion 解釋
高頻失真
  • high : adj 1 高的〈指物，形容人的身高用 tall〉；高處的；高地的。2 高級的，高等的，高位的，重要的。3 高尚...
  • 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。
  • distortion : n. 1. 歪扭，扭曲。2. 【電學】（信號、波形等的）失真；【物理學】（透鏡成像產生的）畸變；【醫學】扭轉，變形。3. 竄改，歪曲，曲解。adj. -al
  1. High - frequency link power converters are receiving increasing attention. when the input frequency of ac - ac converter is quite high, such as 20khz or above, in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage, the switching cycle becomes discrete pulse spectrums, however, the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria

    當交-交變頻器的輸入頻率非常高，通常為20khz時，為了在零電壓條件下實現逆變器開關管的通斷，變換器的開關時刻必須選擇在高頻交流電壓脈沖為零時，這意味著變換器開關時刻在時間軸上成為不連續的點，而常規的硬開關pwm變換器是將開關時刻選擇在任意時刻。
  2. This paper gives a systematical research on high frequency distortion performance of vehicle shock absorber. we prove that the cavitation specific property is another basic cause of high frequency distortion of vehicle shock absorber. we put forward the new utility engineering theory about saturated a un - saturated high frequency distortion clearly. we also sum up the technology norms of the test of shock absorber cavitation specilic property on domestic equipment comprehensively

    該文對車輛筒式減振器高頻畸變特性進行了系統研究.揭示並論證了泡沫特性是筒式減振器高頻畸變的另一類重要基本成因，明確地提出飽和與不飽和高頻畸變等工程實用新概念.文中還對使用國產設備進行減振器泡沫特性臺架試驗的技術路線進行了歸納
  3. Based on the geophone vibration formula, this paper presents the affective factors to the seismic data from high resolution geophone arrays and its main property specifications, such as natural frequency, damping coefficient, sensitivity, harmonic distortion, and alias

    為此，從檢波器的振動方程出發，對高解析度地震檢波器性能指標（如自頻率、阻尼系數、靈敏度、諧波失真、假頻等）以及檢波器組合的連接方式對地震資料品質的影響進行了分析。
  4. And it investigates the appearance condition ( including joint, crack, eroding, corrosion, braking pole device rupture, crane - girder ' s gnawing railway and so on ) of the whole crane - girder system on the spot, at the same time, it also actually examines the stress of the beam, chemical ingredient, distortion and railway excursion, etc. through sampling, and based on the actually examined results, it checks and calculates the carrying capacity of crane - girder system. then, based on the investigating on the spot and the calculated result, it discusses the mechanism of fatigue failure of the upper part of welded steel crane - girder, analyses the reason of steel crane - girder in the high - frequency emerging the fatigue crack, institutes the strengthened method of damaged steel crane - girder of accurate packing up workshop of the primary mill plant. finally, it presents some advice and suggestions for the repairing and strengthening method of fatigue crack of upper part of steel crane - girder in the high - frequency

    針對包鋼初軋廠精整車間鋼吊車樑上部區域出現裂縫這一問題，本文首先綜述了國內外關于焊接鋼吊車樑上部區域疲勞裂縫的研究現狀；其次對整個吊車梁系統的外觀情況（包括連接、裂縫、腐蝕、銹蝕、制動桿件斷裂、吊車啃軌等）進行了現場調查，抽樣實測了梁的應力、化學成分、變形及軌道偏移等，根據實測結果，對吊車梁系統的承載能力進行了驗算；然後，根據現場調查及計算結果，探討了焊接鋼吊車樑上部區域疲勞破壞的機理，分析了重級工作制鋼吊車梁出現疲勞裂縫的原因，制定了初軋廠精整車間破損鋼吊車梁的加固方案；最後就重級工作制鋼吊車樑上部區域出現疲勞裂縫的修復與加固方案提出了一些意見和建議。
  5. In the distribution system, many capacitor banks are applied to decrease the loss of the network. the harmonic resonance may be incurred between the network and the capacitor banks in the harmonic frequency, thus the security of the system may be destroyed because of the high harmonic distortion level

    配電網中裝設了大量的電容器進行無功優化來降低網損，但在諧波頻率下，容易產生系統與電容器之間的諧波諧振或諧波放大，從而使系統的諧波畸變率變大，破壞了系統的安全運行。
  6. Experiment results suggest that the response distortion induced by the sealed pressure case appears in the mid and high frequency area

    實驗結果揭示，由高壓密封艙引起的頻響變異發生在中高頻區段。
  7. The main limitation of a intensity - modulated - continuous - wave laser rangefinder is the leakage distortion created by the high frequency current source which modulates the laser diode

    在調強連續波激光測距系統中，調制激光器的高頻電流源產生的泄漏干擾是影響測距精度的主要因素。
  8. The characteristics of three - level ( tl ) converter and its effect to the zero - crossing distortion are analyzed, and extended it to ml converters, which are suitable for the high input frequency pfc application

    文章詳細分析了三電平（ three - level ， tl ）變換器的特點和對輸入電流過零畸變的改善作用，並推廣至多電平變換器。
  9. In this circuit, we use many kinds of negative feedback to modify the ou tput wave, which can decrease the distortion. and we use the high - voltage and high frequency capacitance efficiency, which can decrease the disturbance of output signal of variable frequency source for the test of part discharge

    採用了多種負反饋迴路修正輸出波形，使得輸出電壓波形的失真度很小；並且在電路中有效利用高壓高頻電容，減小了變頻電源輸出的電壓對局部放電試驗時的干擾。
  10. The three - phase high - frequency ac pulse density modulation ( pdm ) converter, which is proposed in this paper, can efficiently synthesize low - distortion variable frequency variable amplitude low frequency voltage signals from the fixed - frequency voltage of the high frequency link

    本文闡述的高頻交流脈沖密度調制（ pdm ）的控制策略能夠較容易地將高頻交流信號低失真地合成幅值和頻率變換的低頻信號。
  11. Because of the broadcasting characteristics and power efficiency of multi - media, tds - ofdm ’ s dcli has strong capacities of adapting to high moving speed and preventing various distortions, it could be applied to the common complex distortion environment of broadcasts that cover large areas ; the time - frequency combination process allows for fast channel estimation and balancing, which could be used to support high - speed moving reception of high definition television

    由於具有多媒體廣播特點和省電功能， tds - ofdm的幀頭適應高速移動和抗多徑干擾的能力非常強，能適應大范圍廣播覆蓋造成的復雜干擾環境；時頻結合處理的快速通道估計和均衡，支持高清電視高速移動接收。
  12. Low distortion at high current operating, highly stable on operating frequency

    -高電流下超低歪，高穩定性工作頻率
  13. This paper introduces some practicable way of eta, presents the principle of each method and compares their virtues and shortcomings. among them, the vca ( voltage controlled amplify ) becomes prominent for its good characteristics, such as wide output dynamic range, low nonlinear distortion, flat amplitude - frequency characteristics, high amplitude resolution

    對衰減器的總體方案和實現方法作了全面的分析、並著重分析了電路設計和研製中的各個關鍵問題，如動態范圍，幅頻特性，相位特性，非線性失真等。
  14. If the sampling frequency is too low, the computer will not capture these high frequency components and this causes distortion

    如果取樣頻率太低，計算機將無法捕捉這些高頻，從而導致失真。
  15. The algorithm takes advantage of the merits of the watermarks both in low frequency and high frequency and can embed more information with less distortion. experimental results show the algorithm is robust to many common image operations. as for the vector map data, an uniform model of embeding watermark for vector maps and raster maps is proposed after current trend of research and watermarking methods of 3 - d vector images are summarized, primary study results show the model is effective and promising to further research

    目前該問題在國內外都還處于探索階段，作者在分析了國內外三維矢量水印的研究狀況、研究方法后，提出了將矢量數據中的部分信息轉化為柵格形式后再嵌入水印的方法，該方法使地圖柵格數據和矢量數據在嵌入水印時能夠使用統一模型，初步的實驗結果表明該方法為二維地圖矢量數據的水印嵌入開辟了一種新途徑。
  16. However input current distortion at the zero - crossing of the input voltage is a common problem in active pfc converters, and it becomes more serious as the line frequency is increased. the purpose of this thesis is to reduce the zero - crossing distortion of input current at high input frequency application

    但有源pfc變換器存在輸入電流過零畸變的缺陷，並且隨著輸入頻率的升高而越來越嚴重，本文的工作就是針對解決高輸入頻率下嚴重的輸入電流過零畸變而展開的。
  17. Based on the discussion of the nonlinearity of the vibrator, the mathematic model of ultra - low - frequency vibrator is established. then, on the basis of the ziegler - nichols pid controller, pid control parameters are modified according to the control requirements of object, and the computer simulation is done. finally, low - frequency feedback system is built up, which solves the problem of high distortion of the output of vibrator under ultra - low frequency

    從分析標準振動臺在超低頻時的非線性因素入手，建立了超低頻標準振動臺的數學模型；然後在zieglernichols法設計pid的基礎上，根據控制對象的性能要求修正了pid參數，並作了模擬研究；最後設計出低頻反饋系統，解決了振動臺超低頻失真度較大的問題。
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