速度畸變 的英文怎麼說

中文拼音 [biàn]
速度畸變 英文
speed distortion
  • : Ⅰ形容詞(迅速; 快) fast; rapid; quick; speedy Ⅱ名詞1 (速度) speed; velocity 2 (姓氏) a surna...
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  • : Ⅰ形容詞1 (偏) lopsided; unbalanced2 (不正常的; 不規則的)irregular; abnormalⅡ名詞[書面語] (零...
  • 速度 : 1. [物理學] velocity; speed; blast; bat 2. [音樂] tempo3. (快慢的程度) speed; rate; pace; tempo
  1. At present, the typic harmful current detection methods are the fast fourier transform algorithm in frequency domain and methods based on the instantaneous reactive power theory, these methods all require some transform and quick, real - time calculating, so high precision analog multipliers or high speed dsp chip with fast a / d are needed, this results in complex circuit and high cost , which have restricted the development of apf

    目前電流檢測常用的方法有頻域法的fft和基於瞬時無功理論的電流檢測法。這些方法均有一定的換,需要快、實時運算,因此必須使用高的數字微處理器和高性能a / d轉換器,這必將大大提高系統成本,使得電路結構復雜,在一定程上限制了有源濾波器的發展。
  2. On the basis of formation and operation principles of the bar code identification system, the author has studied the moment - invariants theory of pattern recognition, and combined the other image processing techniques, then developed a bar code identification system which can recognize not only the lightly contaminated and incomplete bar code but also the distorted bar code with arbitrarily angle. using the idea of the layers, the author has consteructed a kind of two dimension barcode, and developed the identification system for it

    在簡介條碼識別系統的組成及工作原理的基礎上,作者針對條碼圖像攝入過程中可能遇到的種種情況,以矩不為特徵的模式識別理論為依據,結合矩陣分割和其他數字圖像處理技術,開發出不僅能對輕污染與殘缺的條碼進行識讀,而且能對任意角的條碼圖像進行快識別的一維條碼譯碼系統。
  3. Because no need to perform image thinning, the method is more faster and can avoid many spurious minutiae caused by thinning aberrance

    由於無需進行圖象細化處理,因此處理較快,且可以避免由於細化而產生很多虛假細節點。
  4. Based on the unified recursive formula, the four algorithms included in this study are the central difference method, the newrnark ' s method, z - transform method, and duhamel ' s step integral method. the accuracy, the phase and other existent problem are studied in this paper. it is proved in this paper that the recursive parameters b1and b2are relate to the poles of theoretical transfer function

    分析中可以發現,中心差分方法, newmark中點加方法、 z換方法及duhamel逐步積分法在精范圍內其計算相位是沒有的,中國地震局工程力學研究所頃土學位論文一但是中心差分方法, newmark中點加方法隨著采樣間隔及系統自振頻率的增大,系統的固有自振周期被改,其傳遞函數的共振區域與理論傳遞函數的共振區域會發生分離。
  5. Shock absorber is an important part of the vehicle suspension system. as an essential damping part of chassis components, shock absorber is closely connected with the operation, security and comfortabieness of the vehicle. the outer performance of shock absorber shall be indicated by the indicator diagram and the speed characteristic. the double - tube hydraulic shock absorber critical velocity is very low and easy to make outer performance degradation

    減振器在車輛懸架系統中發揮著重要的作用,作為汽車底盤的主要阻尼元件,它不僅影響到車輛的舒適性,還關繫到車輛的操縱性及安全性,其外特性由示功圖和特性表示;普通雙筒液壓減振器臨界較低,易發生外特性,且低溫條件下更易發生
  6. As to the video signal, alarm signal, control signal, are all weak electricity signal, exceedingly easily be subjected to the jam, in case the power supply system does not steady, wave propag ation is greatly, the harmonic content of power source overtops, the veins wave factors are great unduly, and even power source equipment breakdown, outputting abnormal, will be about to affect the video signal image effect, and dependability cuts downs to the security and alarming system. we adopt fast fu lye ' s mutation rule - fft alternatives, by the way of carrying fft alternatives to the local junction circuit, regulated power supply, ups ' s power source, and switch power source, thereby diagnose every degree harmonious wave content of power souse, and abnormal coefficient, compared to the normal working situation. thereby diagnose out the working condition of the regulated power supply, ups ' s power source, and switch power source

    如果有供電系統不穩定、波動大,電源的諧波含量過高,紋波系數過大,乃至電源設備損壞、輸出異常等情況出現,將會嚴重影響視頻信號的圖像效果,大大降低防盜系統的穩定性和可靠性,我們採用快傅利葉換原理,即fft換,通過對市電、穩壓電源、 ups電源、開關電源等的電壓信號進行fft換,從而得出信號中各次諧波的含量及信號系數,並將其與正常工況下的參數進行對比,從而進一步診斷出穩壓電源、 ups電源、開關電源等設備的運行狀況;組成監控系統的設備長期處于工作狀態,往往由於設備散熱條件不好、設備老化故障等原因導致設備表面溫過高,從而影響設備的正常運行,降低設備的使用壽命。
  7. Experimental results show that the grains were gradually triturated to namometer size with milling time and the grain size might be 30nm or so, but the grain size was not decreasing after the powder has been milled for 25 hours. the nano - sized sic was synthesized by ball milling of si and c mixed powders which rare earths as a additive was added to

    結果表明:隨著時間的延長,粉末逐漸細化至納米級,可以細化到30nm左右,但球磨時間超過25h后粉末顆粒繼續細化的明顯放慢,並且在球磨的過程因為晶粒細化和晶粒內部發生了嚴重的晶格,納米粉體x射線衍射峰產生嚴重寬化。
  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

    深入研究了測量精為0 . 2s級的基於快傅立葉換( 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、諧波總率的計算方法。
  9. Later on, after elaborating the disadvantages of the old methods in detecting and recognizing moving objects, a series of corresponding approaches are proposed, such as grid scan, local tracking bug and dynamic window in object tracing to reduce the huge data needed to be processed, maximum and minimum for selecting a proper segmentation threshold and improved conversion from rgb model to hsv and so on to decrease the influence of inhomogeneous lighting and the color noise, a bilinear interpolation in each quadrant to eliminate the bad effect on the recognition precise because of the distortions of the camera. after that, much emphasis is given on application study in pattern recognition with a feed - forward neural network. both the basic bp algorithm and improved bp algorithm in the study process are described in detail, and the later is used to quicken convergence speed and improve validity of the network

    然後,分析和闡明了傳統的運動目標檢測方法的不足,並在此基礎上結合研究中的實際實驗環境,提出了一系列解決方法,包括針對降低龐大數據量而提出的網格掃描、局部「跟蟲」追蹤和動態窗口掃描等目標檢測方法,針對實驗環境中光照不均和顏色干擾提出基於人機交互的最大最小值閾值選取方法和引入改進的rgb模型到hsv模型的轉換方法,為消除圖像對識別精的惡劣影響而採用的通過控制點進行雙線性插值進行校正的方法;緊接著,概述了神經網路的發展歷史和幾種常用神經網路模型的特點,重點研究了前饋型神經網路在模式識別中的應用問題,詳細闡述了基本的bp演算法和學習過程中bp演算法的改進,從而使網路收斂更快,解決問題更有效,並在此基礎上,設計了一個基於bp神經網路的運動目標識別系統,給出了實驗結果。
  10. The differences between this method and other similar methods are : ( 1 ) the fast synthetic source record algorithm based on the wave theory is adopted in prestack depth migration. ( 2 ) the plane wave source is used in migration that is consistent with the velocity analysis method. ( 3 ) by using the controlled illumination, the distortion of the plane wave source wavefield due to the lateral velocity variation is avoided therefore the error of velocity analysis is reduced and ( 4 ) the practical velocity spectrum makes the interactive migration velocity analysis feasible and convenient

    與其他類似偏移分析方法的不同點在於: ( 1 )疊前深偏移採用基於波動理論的快合成震源記錄演算法; ( 2 )偏移方法採用平面波震源,與分析方法一致; ( 3 )應用控制照明技術,避免了因橫向而導致的平面波震源波場在傳播過程中的,從而減小了分析的誤差; ( 4 )實用的譜設計,使交互偏移分析可行且易於操作。
  11. In order to get good dynamic as well as static performance, multiple - loop control strategy with the instantaneous outer voltage loop and inner current loop is used in pfc converter based on dsp tms320lf2407a

    內環通過瞬時值控制獲得快的動態性能,保證輸出率較低,外環使用輸出電壓的瞬時值控制,具有較高的輸出精
  12. In this thesis, assembler language was applied to program to realize dsp algorithm controller, which can perform such main computing as data collecting, self - adaptable distortion current detecting based on linear nerve cell, capacity voltage controlling in the side of direct current based on fuzzy control, pwm pulse width computing based on unsymmetrical rule sampling, etc. quick control speed ( one work period is 50 s ) and high accurateness feature largely in the controller

    本文採用匯編語言編程實現了dsp演算法控制器,它完成了數據採集、基於線性神經元的自適應電流檢測、基於模糊控制的直流側電容電壓控制、基於非對稱規則采樣的pwm脈寬計算等主要演算法的運算。該控制器具有控制快(一個工作周期為50 ) ,精高等特點。
  13. The lower temperature is the easier degradation. with compressed gas inside of the double - tube gas hydraulic shock absorber, a suitable pressure on the hydraulic tube, with obviously improves the critical velocity of shock absorber and then eliminates the possible distortion of outer performance degradation

    由於雙筒充氣液壓減振器中充有壓縮氣體,在儲油筒內建立了一定的背壓,因而能夠明顯地提高減振器的臨界,有效地消除外特性,顯著地改善減振器的性能,從而提高車輛懸架系統的品質。
  14. What the subject researching is that power energy should be measured with base wave ammeter to power systematic nonlinear user ; and that it is high veracious by base wave ac parameters measurement method to those not bad contaminative. it is well known that all kinds of ac parameters including of base wave and harmonics, but the content of harmonics in power systems increase largely with the mass disturbance to power using high - power electric equipment. which makes wave shape of voltage and current aberrence, so the measurement veracity and reliability decreased largely. at the same time brings out serious infuency to safe run of power system and electric equipment. the power which any non - linear loads consumes can be divided into two sides, one is base power absorbed in power and the other is minus harmonics power

    本課題所研究的問題是針對電力系統非線性負載用戶採用基波電表來計量電能;而對諧波污染不嚴重的線性用戶採用基波交流參數測量的方法仍然具有較高的準確性。眾所周知,各種交流參量都包含基波和各次諧波,然而隨著電力電子技術的迅發展,大功率的用電設備對電網的干擾也是越來越嚴重,導致電力系統諧波含量迅增長,使電壓和電流的波形產生嚴重,測量的準確性和可靠性都大大降低,同時也對電力系統和用電設備的安全運行帶來嚴重的影響。任何一種非線性負載所消耗的功率都可以分為兩部分,一部分為從電網中吸取的基波功率,另一部分則是負的諧波功率。
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