檢波前的 的英文怎麼說

中文拼音 [jiǎnbōqiánde]
檢波前的 英文
predetection
  • 檢 : Ⅰ動詞1 （查） check up; inspect; examine 2 （約束; 檢點） restrain oneself; be careful in one s c...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 前 : Ⅰ名詞1 （在正面的） front 2 （次序在先的） first; top 3 （過去的; 較早的） ago; before; preceding...
  • 的 : 4次方是 The fourth power of 2 is direction
  1. Nowadays, the ways to detect the piles are various, and all of them are limited in some aspects. for instance, coring test do large scathe on the piles, and static load test will waste much time, money and energy, while some ways are hard to operate as the limitation of the length and the diameter of the piles, and the special condition on the spots, such as high - strain, low - strain, and so on. furthermore, the result can only be gained under the complex analysis of the collected wave, and under the validation of the coring test

    目前，工程中常用的樁基檢測方法很多，但都存在著一些弊端：有的對樁破壞性嚴重，例如抽芯檢測；有的耗時、耗財、耗力，例如靜載荷試驗；還有的如低應變、高應變等檢測技術由於受到樁長、樁徑以及現場一些特殊情況的限制，操作很不方便，而且採集到的波形要經過比較復雜的處理分析方能得出結論，而這個結論卻還要輔助取芯手段加以驗證。
  2. 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

    目前畸變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畸變電流檢測法。這些方法均有一定的變換，需要快速、實時運算，因此必須使用高速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，在一定程度上限制了有源濾波器的發展。
  3. A cyclic radial shearing interferometer was used to diagnose the wavefront distortion of a laser system and an lcslm ( liquid crysnd spatial ligh modulator ) was used to control it. some results have been summarized as follows : l. according to the theory of scalar quanity diffeaction and the model of the random gaussian phase screen of low frequency wavefront, the effect of the low frequency wavefront with different rms gradient on the focal spot of a laser beam was studied

    本論文在激光光束波前畸變檢測和控制上進行了新的探索，主要就空間相位調制環路徑向剪切干涉儀以及它對波前畸變的檢測和液晶空間光調制器及其對中頻段波前畸變的控制進行了研究，其研究的內容和取得的成果如下：一、根據標量衍射理論，結合低頻波前畸變的高斯隨機位相分佈模型，研究了不同均方根梯度低頻畸變波前對激光光束焦斑聚焦性的影響，並採用描述中頻段波前畸變的功率譜密度概念，模擬計算了它對激光焦斑旁瓣的貢獻。
  4. An adaptive demodulation circuit is also given to reduce the affection of the noise, the interference and the instability of the signal

    目前，採用自適應檢波電路的處理機己經在工業用避碰雷達中獲得應用。
  5. The research results are controlled source which has linear or nonlinear variabe frequency scan function and the seismic instruments which match with it, and the method of small group intervals, small offset, much more channels, short array length, high - frequency receivers are applied during the link of data acquisition, and that the techniques of the refraction static correction, the noise suppressing, the high - resolution velocity analysis, the wavelet length compression, the wavelet zero - phase, and the prestack migration should be applied emphasizedly during the link of data processing and interpretation

    研究表明，對于城市活斷層的抗干擾高解析度淺層地震勘探，在數據採集環節應採用具有線性或非線性變頻掃描功能的可控震源和與其相匹配的地震儀器，以及小道間距、小偏移距、多接收道、短排列和高頻檢波器接收的工作方法；在數據處理與解釋環節，要重視折射靜校正技術、噪聲壓制技術、高精度速度分析技術、子波壓縮技術、子波零相位化技術和疊前偏移技術等的應用。
  6. 3 ) the dynamic traits of six portfolios are very concurrent. after a further analysis towards the performance of forming and testing, it is proved that the noise trading model is suit to explain the violent volatility in china stock market

    第三，六種組合的累積異常收益率的動態行為特徵都非常一致，進一步對其在事件形成期和事件檢驗期的前後表現進行對比分析后，更加驗證了噪聲交易模型所具有的對我國股市股價大幅波動的解釋力。
  7. Point diffraction interferometer - a physical idea, is invented by smartt and strong in 1972, advanced by smartt and steel, and used to test astronomical telescope, it has simple structure and has not special demand to source. recently. with the development of fiber ' s manufacture and coupling technology. the simple modern fiber ' s center is smaller than before, this make it possible to progress fiber point diffraction interferometer ( pdi ), in addition to test convergent wavefront, it can test the reflective concave. the excellence of pdi is that it does not need standard mirror. in intereference testing, the standard mirror is the main reason which limit the improvement of precision, pdi can avoid difficulty to provide the wide future for high precision testing. pdi, which produce the standard sphere wavefront, is an instrument which realize the phase shifting with piezoelectric transducer ( pzt ), and collect the interferogram with ccd, in this paper, a adjusting methord is described, then data processing is obtained

    點衍射干涉儀這一物理思想，早在1972年smartt和strong就已發明，由smartt和steel做了進一步發展，並成功的用於檢測天文望遠鏡，它結構簡單，對光源沒有特殊要求，近年來，由於光纖製造工藝以及耦合技術的發展，單模光纖纖芯不斷縮小，為光纖點衍射干涉儀得以發展提供了前提條件，該干涉儀由激光照明，除了檢測會聚波前外，還可以用來檢測反射凹球面，進而應用到單個面形的檢測；另外，光纖點衍射干涉儀最大的優點是不需要標準鏡，在干涉檢測中，標準鏡是檢測精度受限的很大原因，光纖點衍射干涉儀能繞開這一難度，為進行高精度的光學檢測提供了廣闊的前景。
  8. 7. based on our crsi and algorithm and double lcslm, an adaptive optical hardware system which c & n be used to model arbitrary complicated wavefront and the compensation of the wavefront can be accomplished was built. and according to the characteristic of a crs interferogram of a step wavefront produced by an lctv, the pixel - level calibration of this system is implemented

    七、採用已建立的空間相位調制環路徑向剪切干涉儀及其波前重建演算法，和位相調制持性已知的兩塊液晶空間光調制器，創建了一套用於模擬產生任意畸變波前並加以檢測和反饋控制的自適應光學硬體系統，並通過臺階波前對該系統實現了像素級校準。
  9. Due to the advantages such as short response time, easy operation, and convenient to comprehend the wavefront modes, the hartmann wavefront sensor ( h - wfs ) is widely utilized nowadays in real - time adaptive optics system, turbulence statistical characterization, optical components test, light quality evaluation, laser atmosphere communication, the wavefront correction of ultrahigh power laser pulses, as well as human eye aberrations measurement. the detection accuracy is important to the performance of the whole optical system. considerable efforts have been performed in the investigation of h - wfs wavefront detection techniques in past years

    哈特曼波前傳感器具有實時探測，易操作，可以直觀顯示波前畸變分佈等優點，被廣泛地用作自適應光學系統的波前信息探測和波前畸變補償，大氣湍流統計特性表徵，光學元件檢測，光束質量評價，超強激光脈沖波前整形，激光大氣通信以及人眼象差測量等各個領域之中，其探測精度的高低對整個光學系統的工作性能有著極其重要的影響。
  10. Although there are many literatures describing ultrasonic detector for traffic flows, none of the same category has referred the techniques applied in the design herein such as multi - sensor construction, automatically establishing datum line regardless of suspension height, digital filtering and multi - lane detection as well as measuring length of motorcade

    目前有關超聲波車流檢測器的文獻較多，但本設計中採用的多探頭結構、自動標定超聲波探頭的架設高度、數據濾波以及多車道測量和檢測車隊長度等技術在同類設計中未見使用。
  11. Through the instance of inspection of roadbed disease of certain highway engineering and field operating practice, application prospect and extension value of this technology in the domain of roadbed quality inspection are discussed

    通過瑞雷面波法在某高速公路路基病害調查中的工作實例及現場工作方法，論述了該技術在公路路基質量檢測中的應用前景及推廣價值。
  12. It is very constructive to get power quality parameter in time. in this paper, we study the power quality parameter arithmetic in difference and research tune wave measure in particular. we give a new method based on transform of the shannon wavelet packet interpolation in frequency domain

    本論文研究了電能質量各參數的測量演算法，特別是針對目前頗受關注的電網諧波檢測技術進行了深入的探討，提出了一種shannon小波頻域內插的小波包分解諧波檢測方法，模擬試驗表明該方法達到了很好的抗混疊效果，同時還能檢測出諧波中的高頻成分以及電網中的次諧波干擾。
  13. The new system has strong data manage ability, it can manage the database easily. it also can be improved easily and get deal with human friendly. especially it improve tune wave detection and can realize remote control

    新型電能質量參數檢測系統，數據處理功能強、數據管理方便、系統升級簡單、人機交互性好，特別是解決了諧波檢測中的抗混疊現象，並且能進行遠程監控，具有較大的使用價值和廣闊的應用前景。
  14. According to the gjb 2077 - 94 and the requirement of automatic radio of haige communication co., a new way of bit synchronization is put forward. this article discusses the design of 8 - fsk modulating and demodulating, signal detection, and fec encoding, based on the technique of bit synchronization. ale module is optimized and mended in its application, because it is a module of automatic radio of the company

    本文根據gjb2077 - 94短波自適應通信系統自動線路建立規程和海格通信公司短波自適應電臺對ale模塊的具體需求，採用了一種新的位同步方法：能量跟蹤法，並在此基礎上提出了8fsk調制解調，信號檢測，前向糾錯編碼的具體實現方法。
  15. Based on the investingation and some study methods of the stability on the goaf, the paper has the goaf of the first and second tunnels of wu long channel on coal mine railway leased line in da ning of shanxi province as an example, according to the engineering geological invesitigation and maping in the earth ' s surface, also combining the visit on the relate people, firstly has a geological judge on the space extend of the mostly ledges which have been picked ; then adopts the instrument of engineering surveying and checking ( for short sws ) which is relatively advanced inside and outside to test by surface wave the rockmass and solid near the middle line of the tunnel ( total forty meter ), and has a relatively exact judgment on the place that the goaf impossible reveal ; lastly passing the validate by drilling, it make clear that the results which tested by sws is reasonable and believable, based on finding out clearly the space extend of the goaf, the author makes a relatively systemic study on the stability of wall rock around the goaf

    因此，查明采空區的具體位置，在此基礎上對場地進行工程適宜性評價，對整個工程建設具有重要的指導意義。本論文在總結前人對地下采空區勘察及有關穩定性研究方法的基礎上，以山西大寧煤礦鐵路專用線五龍溝1 ~ # 、 2 ~ #隧道采空區為研究實例，在詳細的地表工程地質調查和測繪的基礎上，結合通過對采空區有關人員的探訪，首先對主要開采礦層的空間展布進行地質判斷；然後採用國內外較為先進的工程勘探與檢測儀（簡稱「面波儀」 ） ，對1 ~ # 、 2 ~ #隧道中線兩側一定范圍內（共40米）進行了面波測試，對采空區的可能出露部位進行了較為準確的判斷；最後通過鉆探加以驗證，表明面波儀的測試結果是較為合理可信的。
  16. The concept of otn node transmission model is introduced. the requirement of otn node transmission model is discussed. this model uses the frequency domain transmission matrix to express the otn node transport characteristics. the simplified model based on wdm and im - dd systems, the relationship between node characteristics and model parameters and measurement of model parameters are also discussed. at last a briefly discussion on how to develop the otn simulation and cad software based on our model is demonstrated

    在線性時不變的假設下，提出利用頻域傳輸矩陣來表示節點傳輸特性的方法給出了oxc和oadm兩類光傳送網節點的統一的表示根據目前通用的波分復用強度調制直接檢波系統的特點對復雜的頻域傳輸矩陣進行了簡化並對通常所關心的節點主要性能指標與模型參數的關系模型參數的測量和計算模型的設計與計算機模擬輔助設計軟體開發的銜接問題進行了討論。
  17. Struggled through 3 years, we had made a 480 - channels marine multi - component seismic exploration system. include new circuit design of digital package, omnidirectional 3 component geophone, ocean bottom towed cable, marine four component seismic acquisition unit, hydrophone, recording system etc. in july 2001, this system was used in dagang field and worked over twenty km. we obtained a good seismic data

    目前已完成了一套480道海底電纜採集系統，包括數字包的創新電路設計，三分量檢波器的萬向平衡裝置，海底電纜鎧裝結構，可拖曳的四分量採集一體化單元，水聽器，系統主機等，並於2001年7月和2002年5月兩次在大港油田渤海灣海域進行了現場實驗，獲得了良好的地震資料。
  18. The linear scale before and after log is an effective way to inspect the reality and accuracy of the log curves, such as downhole signal ' s amplitude limit or not and serious distortion, the variable density logging tool ' s signal linear amplification and working stability

    測前、測后線性刻度對分析、判定變密度測井曲線的真實性與準確性體現在對井下波列的限幅與畸變程度、檢測儀器的線性放大狀態和穩定程度。
  19. Seismic wave ' s property is studied and seismic sensor ' s selection and setup are discussed at first. then, several parts are designed include the prep - amplifier, low pass filter data acquisition of the core of system and the serial interface between dsp and pc. finally, the disquisition presents some measures of anti - interference

    文章首先研究了地震波的特性並對地震檢波器的選擇與安裝進行了討論和設計，接著討論了系統前向通道包括前置放大、低通濾波環節的設計，系統核心數據採集部分vc5402與a d轉換介面以及與pc機串列通信介面的設計，最後介紹了dsp系統抗干擾的一些措施。
  20. In this paper, at first, we analyzed the feasibility of dynamic focusing by interpolation method, and then introduced our particular design of digital - coding emission, dynamic filter, dynamic focusing and digital i / q demodulation in digital front - end based on fpga

    論文首先在理論上分析了內插式數字動態聚焦實現的可行性，然後對數字前端的關鍵技術:數字編碼發射、動態濾波、動態接收聚焦、變跡變孔徑、正交包絡檢波等的fpga實現進行了詳細的闡述並給出了實現方案。
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