distortion ratio 中文意思是什麼

distortion ratio 解釋
變態率
  • 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
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. A camera calibration method with co - line points is proposed, in which distortion center is located according to cross ratio invariability, and then distortion coefficients are calculated based on a line ' s central projection is a line

    摘要提出一種用共線點列標定攝像機鏡頭畸變參數的方法，先根據交叉比不變性確定畸變中心，再利用直線的中心投影仍為直線這一性質確定畸變系數。
  2. It is suggested that the time distortion ratio should be controlled in river model design ( in this model, m1 = 2 ~ 3 is suitable )

    並提出了河工模型設計中有關時間變態率控制的建議（在本模型條件下， m _ t = 2 3為宜） 。
  3. In accord with the state standard about harmonic. the harmonic permission value of tangqian line is calculated. some measurement data are shown and analyzed, and some main conclusion is drawed that the 7th harmonic voltages of tangqian line is near to the permission value, total harmonic voltage distortion ratio has oversteped the permission value. the 3th harmonic, the 5th harmonic, the 7th harmonic and the 9th harmonic current from tangqian line all overstep the permission, the largest 5th harmonic current ratio in tangsc reaches 44 %, the 7th harmonic and the 9th harmonic current in tang7c and tangsc is large maybe because the harmonic current is magnified. this paper studies the model of each element in tang yin substation

    根據有關公用電網諧波的國家標準，計算出湯牽線注入湯陰變電站的諧波電流允許值，從實測數據可以得出一些重要結論：湯牽線7次諧波電壓含有率的最大值接近國標中的限值，湯牽線的諧波電壓總畸變率的最大值已超標；湯牽線注入電網的3 、 5 、 7 、 9次諧波電流都超標；湯6c電容器的5次諧波電流含有率較高，最高達到44 ；湯7c和湯8c電容摘要器的7次和9次諧波電流含有率偏高，原因可能是發生了諧波電流放大現象。
  4. In this dissertation, researching from the basic concept of large signal network analysis, we discuss the measurement theory and technology of rf network nonlinearity and the characterization technology of intermodulation distortion in detail, and analyse some nonlinear characteristic excited with a one tone or multi - tone, such as am - am, harmonic distortion, intermodulation distortion, adjacent channel power ratio and how to qualitatively analyse nonlinearity of rf network to make the measurement and calibration

    本課題從大信號網路分析的基本概念出發，詳細討論了射頻網路非線性的測量理論和技術以及互調失真表徵技術，分析了在單頻音和多頻音信號激勵下的一些非線性特性，如am - am ， am - pm ，諧波失真，互調失真（ imd ）和臨近通道功率比（ acpr ）等，以及根據包絡域方法定性地分析射頻微波網路的非線性特性，以此來進行射頻網路的非線性測量和校準。
  5. Coupling beams " failure mode, shear distortion, ductility and energy dissipation were impacted by different shear - compression ratio from 0. 15 to 0. 20

    是一種值得推薦的抗震聯肢墻小跨高比洞口連梁的配筋形式。
  6. It is concluded that a certain amount of diaphragm will reduce the distortion effect greatly, but on the other hand, even with a fairly great density of diaphragm, such as the ratio of diaphragm span to the greatest dimension of the cross section is as small as 1. 25, the distortion effect ca n ' t be neglected compared with the effect of rigid torsion

    通過研究得到初步結論：設置一定數量的橫隔板可以大幅度地減小薄壁桿件的畸變效應；另一方面，盡管橫隔板設置到比較大的密度（橫隔板間距與截面最大尺寸之比為1 . 25 ） ，與剛性扭轉效應相比，畸變效應仍不能忽略。
  7. By means of wide investigation, instruments development, a series of model experiments and relative theory analysis, following results are obtained in river model time scale distortion ratio, model roughening, inflow and outflow controlling methods and equipment, new water level and velocity measuring technique, model automatic measuring and controlling system : ( 1 ) with the aid of configuration software, a large scale river model automatic measuring and controlling system is developed, realizing river model automatically controlling and basic hydraulic parameters automatically measuring

    本文通過廣泛調研、儀器研製、系列模型試驗和相關的理論分析，在河工模型時間變態率控制、模型加糙、出入流檢測方法和設備、水位流速測量新技術、模型自動測控系統等方面取得了下列成果： （ 1 ）應用工控組態軟體技術，開發了一套大型河工模型自動測控系統，實現了模型內外邊界的自動控制和基本水力參數的自動量測。
  8. Computation method based on fast fourier transformation ( fft ) is studied deeply, whose measurement accuracy is 0. 2s. the computing indexes involve voltage, current, power, frequency, phase, electric power, the harmonic ratio and the total harmonic distortion ( thd ) of phase voltage and phase current

    深入研究了測量精度為0 . 2s級的基於快速傅立葉變換（ fft ）的電壓、電流、功率、頻率、相位、電能等電力參數和各相電壓電流各次諧波含量、諧波含有率、諧波總畸變率的計算方法。
  9. According to this, we propose a new way to renew the traditional method of subjective image quality evaluation, different to only use mse ( mean square error ) and psnr ( peak signal - to - noise ratio ) to evaluate merely on radiation distortion, and complemented quantitative description on compressed image distortion o it is significant to choose the format of video transferation and measuring precision calculation of tracking and measuring systems based on images

    中國科學院長春光機與物理研究所博士學位論文據此提出了不同於傳統的僅用均方誤差（ mse ）和峰值信噪比（ psnr ）來評價圖像灰度輻射畸變的新思路，補充了對壓縮圖像幾何畸變的定量描述。這對于基於圖像的測量跟蹤系統中數字圖像傳輸方式的選擇，以及評價壓縮解壓演算法對測量精度的影響有重要意義。
  10. Test results show that this adc achieves the snr of 90 db and distortion ratio of 0. 0248 % for a 20khz signal bandwidth while operating under a single 3. 3v supply

    晶元測試結果顯示其信噪比達到90db ，總諧波失真0 . 0248 % ，基本達到了預期的設計指標。
  11. This paper introduces a method of calibrating and processing angular speed fluctuation in ni sampling system - pxi - 6281, it accomplishes the acquisition of angular speed fluctuation by distortion of signal, analyzing fundamental wave, high order harmonic of angular speed feedback signal and calculating the amplitude ratio of base wave and high order harmonic

    摘要利用ni的pxi - 6281高速數據採集卡來完成角速度波動信號的採集，借鑒信號失真度的概念，分析角速度反饋信號的基波和高次諧波大小，求取高次諧波與基波幅值比，作為角速度波動率。
  12. The cross short rollers guide way and servo feed - system are the most important parts of 3mz204cnc bearing internal grinding machine made by luoyany bearing research institute. - we have analysised firstly the factor of influence with roller guide way rigid, and we have obtained a load - distortion curve. we also have analysised the dominating factors influence with distinguish ratio of guide way, and we have obtained a solution about pre - tighted load which were tested by experiments

    本文對洛陽軸承研究所研製的3mz204cnc全自動內圓磨床的核心部件：十字交叉滾子導軌和數控進給系統展開研究，首先對影響滾動導軌剛度的因素進行分析，得出載荷?變形曲線，對影響導軌解析度的各因素進行分析，得出預緊力大小與分佈對解析度和起動力的影響，並通過實驗驗證。
  13. Image geometric correction based on distortion ratio

    基於畸變率的圖像幾何校正
  14. Introduction to communication systems ? analysis and design of communication systems ; analog and digital modulation and demodulation, frequency conversion, multiplexing, noise and distortion ; spectral and signal - to - noise ratio analysis, probability of error in digital systems, spread spectrum

    通信系統基礎：通信系統分析和設計，模擬和數字調制和解調，頻率轉換，統計復用，噪聲和失真；譜分析和信噪比分析，數字系統誤碼率，擴展頻譜。
  15. The longitudinal young ' s modulus and the in - plane shear modulus decrease with the increase of the maximum misalignment and the distortion width, but the transverse young ' s modulus and main poisson ' s ratio have no obvious change

    研究了不同的最大纖維偏轉角和變形區寬度對層合板彈性常數的影響，發現隨著和的增加縱向彈性模量和面內剪切模量逐漸降低，橫向彈性模量和主泊松比變化不明顯。
  16. The research work of the thesis include mainly : ( 1 ) observe a phenomenon which the two fracture modes are simultaneously found near crack tip of a four - point - bend specimen when the ratio of m / q is close to 3. 0mm, criteria m / q, when the fracture mode of four - point - bend specimen transits from void - mode to shear - mode. intensely location plastic distortion is observed in the front of crack tip and the macro - fracture of the specimen with the same m / q belongs to shear - mode fracture

    本文主要在以下幾個方面取得了一定的進展：通過四點彎試件的斷口和切片試驗，觀察到裂紋尖端同時存在兩種斷裂機制? ?在兩種斷裂模式相互轉化的臨界狀態附近，裂紋前方既有鈍化和延伸區中的空穴形核擴張，又有銳化角前劇烈的集中剪切變形。
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