back projection 中文意思是什麼

back projection 解釋
背景放映法，銀幕合成
  • back : n 1 背，背部；背脊；背面，反面；背後，後部，後面，裏面。2 （指）甲；（刀）背；（手）背；（書）背...
  • projection : n 1 射出，投擲，發射，噴射。2 投射；投影，投影法；（地圖）投影圖製法；【電影】放映。3 凸出；凸出...
  1. All the nightclub apartments are equipped with american jbl sound, bass cannon, 43 inch back projection colorcast, full automaticity power amplifier machine and choose song system, self reliant wash room and telephone room. every room contains 100 thousand songs in chinese, japanese, korean and english to meet the guests demands

    夜總會豪華包廂內設有美國jbl音響，低音炮， 43寸背投彩電，全自動功放機，全自動點歌系統，設有獨立的洗手間和電話間每個包房內有中日韓英文歌曲10萬首，適合各位賓客的需求。
  2. On the basis of investigation and research about the technology of reconstruction for ict image up - to - date, this paper is devoted to develop an algorithm for image reconstruction based on wavelet theory. in this paper, time - frequency distribution for spatially varying filter was used to construct convolve - kernel by dwt, to modify convolve - back - projection algorithm

    本文在國內外有關ct圖像重建的研究狀況基礎上，根據小波分析理論，利用小波變換在時頻空間的可變性，用dwt變換構造卷積核，對卷積反投影演算法做了改進。
  3. The image reconstruction algorithms is thoroughly researched. the filter back projection ( fbp ), algebra reconstruction technology ( art ) and fan beam data rearrangement algorithm used in medical computer tomography are improved. the noser algorithm, linear neural networks method and hopfield neural networks method are presented and gain the better result of image reconstruction

    深入研究了圖像重建演算法，改進了醫學ct的濾波反投影演算法、代數重建技術和扇束投影數據重排方法，提出了帶圖像光滑約束的noser演算法、線性神經網路方法和hopfield神經網路方法，並得到了較好的圖像重建結果。
  4. I thought i would embarrass the financial director by revealing his next month ' s projection but i was hoist with my own petard when the leak was traced back to me

    我本想透露財務處長下個月的計劃使他難堪的，但消息泄漏一事追查到我時，我便搬起石頭砸了自己的腳。
  5. Fourthly, a fast back projection ( fbp ) algorithm is presented. it sloves the problem of large computational load of bp algorithm and the condition of dividing the subapterture is presented

    接著提出了一種快速後向投影演算法（ fbp ） ，解決了bp演算法計算量大的問題，給出了子孔徑劃分的條件。
  6. 6. video of flow pattern is realized with the linearity back projection ( lbp ) arithmetic. 7

    編制基於線性反投影演算法（ lbp ）的成像程序，實現流型的可視化。
  7. Lbp ( linear back projection ) method which is used in multiphase tomography is adopted to deal with ill matrix and speed up reconstruction

    進而藉助于多相流電容成象中的lbp法，處理病態矩陣和提高建象速度。
  8. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。
  9. Secondly, two applications of gpml abc in modeling pulse radar are shown : one is detecting pipeline underground, and the other is its application to highway technology. thirdly, with back - projection algorithm, we have formed the image of tree - trunks. in summary, the application of fdtd in uwb fopen so far is impressive

    然後，對適用於有耗媒質的gpml邊界條件的應用開展了深入研究，對脈沖雷達探測地下管道和測量高速公路瀝青層厚度進行了fdtd演算法模擬。
  10. Its image reconstruction belongs to the image reconstruction under narrow fan - beam scan mode. after comparing different algorithms, this paper introduces convolution back projection algorithm for the parallel image reconstruction

    採用高能直線加速器作為射線源的高能x射線工業ct機多採用窄角扇束掃描方式，其圖像重建屬窄角扇束掃描方式下的圖像重建。
  11. The narrow fan - beams are reset into parallel beam then the image reconstruction is conducted by parallel beam " convolution back projection algorithm, which combines the high scan efficiency with the convenience of image reconstruction. this paper analyses the parallelism in narrow fan - beam " convolution back projection algorithm, divides the task of image reconstruction into several subtasks, and discusses the parallelization of narrow fan - beam " decomposition and reset, parallel beam " convolution back projection, and image accumulation

    對于窄角扇束掃描方式，把窄角扇束重排成平行束，再由平行束卷積反投影重建演算法來重建圖像，是把掃描的高效率和重建方式的簡便易行很好的結合起來。本論文對窄角扇束卷積反投影演算法進行了并行性分析，指出把圖像重建任務分解為多個子任務并行工作，並在工作站機群上討論了窄角扇束的分解、重排、平行束卷積反投影圖像重建、圖像合成的并行實現。
  12. The image of computed tomography ( ct ) is of good quality and high resolution. it can be processed and analyzed digitally therefore, ct has become a new nondestructive detection technique, which is applied widely in aviation, shipping, automobile, public security and other areas. the filter back - projection ( fbp ) technique and the algebraic reconstruction

    =計算機層析成像（簡稱ct ）技術檢測精度高、重建的圖像具有無影像重疊、空間解析度和密度解析度高、可以直接數字化處理與分析等特點，成為近十幾年發展起來的一種新的無損檢測技術，廣泛應用於航空、航天、機械、船舶、公安、海關等諸多領域。
  13. In this paper, the author attempts to discuss two main problems of convolution back projection algorithm basing on fan - beam scanning

    本文主要探討了卷積反投影演算法的兩個核心問題：卷積窗函數與內插函數。
  14. Under wide - aperture, the anisotropy of scattering centers become evidence, in this paper, we propose a new algorithm based on sub - aperture and filtered back - projection algorithm to estimate the anisotropy of scattering centers in wide - aperture imaging

    然後針對散射中心方向特性提取問題，結合子孔徑思想和濾波逆投影演算法提齣子孔徑濾波逆投影演算法，模擬結果驗證了演算法的有效性。
  15. This software can be used to construct automatically 16 electrodes and 32 electrical electrodes finite element method ( fem ) division model. the equi - potential lines in any drive pattern can be plotted and the boundary potential changes in its forward problem can be obtained. using back projection method, the impedance imaging in simulation and real measurement can be reconstructed

    該軟體對任意形狀、結構的場域可實現自動剖分，可建立16電極、 32電極求解模型；正問題部分可給出各種激勵情況下的等位線分佈和邊界電位變化情況；逆問題部分用反投影法實現了圖像重構，並成功應用於所研製的測試系統。
  16. In inverse problem of ert, the linear back projection algorithm based on sensitivity field is used to reconstruct the qualitative image. assume that the change of conductance is slight, so the sensitivity can be approximately

    在電阻層析成像的成像演算法方面，論文中使用了基於敏感場的線性反投影演算法，假設電導率分佈的變化不是很大，則場內敏感場系數的分佈可近似的認為不變，這樣就可利用敏感場矩陣直接求取多幅圖像。
  17. Firstly, based on the development history and characteristics of stock market the thesis looked back the development history and characteristics of every stage of chinese stockjobbers laid stress on the business development and risk management. secondly, the thesis analyzed the existing comprehensive evaluation method and choosed or model of data envelopment analysis as evaluation model. then we analyzed the deficiency of ( 7r model and established two new model - average value model, go model and its corresponding projection model - which were used to evaluating and sequencing fourteen comprehensive stockjobbers and draw a conclusion based on computation result of the three models

    本文首先以我國證券市場發展歷史及特點為基礎，回顧我國證券公司發展歷程及各階段經營特點，主要分析證券公司業務發展和風險管理狀況；其次，對證券公司現有評價方法進行研究，選擇數據包絡分析（ dea ）的c _ 2r模型作為對證券公司進行評價的數學模型，針對c _ 2r模型排序時存在的並列第一和零權重問題，提出均值模型、 g _ 0模型及相應的投影模型，並對三種模型的計算復雜度進行了討論；第三，選擇14家綜合類證券公司進行實證研究並對三種模型的計算結果進行了對比分析；最後，簡要總結2001年證券市場狀況並對證券公司今後面臨的機遇和挑戰進行了分析。
  18. Finally, global optimization is applied to minimize the back projection errors, which can refine the data and produce a jointly optimal 3d structure

    我們將它們通過一組相似變換轉移至同一坐標系下，就得到了物體整體的三維結構。
  19. The parallelization of image reconstruction by convolution back projection with narrow fan - beam based on workstations cluster can solve fast image reconstruction of high power x - ict, and the speed of parallel image reconstruction relates to the numbers of workstations involved

    本論文採用窄角扇束卷積反投影圖像重建在工作站機群上的并行實現能解決高能x射線工業ct機的快速圖像重建問題，并行圖像重建的速度與參與并行實現的工作站數有關。
  20. The convolution back projection ( cbp ) technique and the algebraic reconstruction technique ( art ) are two of the major image reconstruction methods in ct

    現在主要有兩大類重建圖像的方法:變換方法和迭代方法.變換法以卷積反投影演算法最為常用，醫學ct普遍採用變換法成像技術
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