衰減圖 的英文怎麼說
中文拼音 [shuāijiǎntú]
衰減圖
英文
decay pattern-
Some by - products of this work can be used as routine tools in the uv laser laboratory. commercial video ccd cameras are used to image uv laser and soft x rays, window glass as a fluorescer is used to indirectly measure the uv laser beam profile with high energy density, and a special glass which permits uv light to pass through while absorbs the visible, is introduced into the uv beam profiling in strong visible stray light environment
實驗中發展了一些測量技術，例如用可見光視頻ccd直接測量紫外激光的光束分佈和激光等離子體產生的x光二維圖象，利用窗玻璃作為熒光體測量能量密度較高的紫外光束分佈，利用可見吸收紫外透射玻璃製成的衰減器測量有嚴重背景光的紫外光束分佈，可以作為實驗室的常規測量工具，並有一定的推廣價值。Based on the theory of the extended fractal dimension, this paper studied the attenuation level of self - similarity of various map objects with the variety of the map scale, and researched further the relationship between the scale level factor of map features and fractal attenuation
以擴展分維作為理論基礎，從變維分析的角度出發，研究地圖目標的自相似程度隨比例尺變化而衰減的規律，進一步研究地圖目標的尺度指標與分形衰減之間的關系。Compared with straight ray tracing, inversion of bending ray tracing is better when data of test are accurate. on the other hand, natural weight is introduced and numerical simulations and experiments of wlm on inversion of velocity and attenuation are also made, which show that wlm, with resistance of noises and convergence of iteration, may get good re - construction images
本文引入了物理意義明確的自然權，對基於自然權的加權阻尼最小二乘反演演算法（ wlm ）在速度反演、衰減反演中進行了數值模擬和試驗研究，結果表明wlm均能獲得良好的重建圖像，迭代收斂，抗噪能力強。Circuit analysis sub - system adopts the newly advanced methodology, circuit topology analysis, and circuit sensitivity analysis to generate layout constraints and control performance degradations
電路分析子系統採用新提出的信號流分析方法再結合已有的電路拓撲分析和電路靈敏性分析方法生成布圖約束控制電路性能的衰減。Revolutionary longwave image quality longwave 8 to 9m performance provides superb high definition image quality, ultra precise
圖像性能提供極其精確的測量精度，低的大氣衰減率和高解析度的The second chapter is about model experiment study, it introduces purpose, scheme, equipment and experiment contents having copperplate and copper ball as object by comparability rule experimenting plenty of physical models, deals with experiment data and makes second field attenuation voltage curves first field isoline both single aperture and mutli - aperture in different situation. in the end, it obtains best depth of multi - aperture source
利用相似性準則進行大量的物理模擬實驗，實驗觀測中以銅板和銅球作為目標體，詳細介紹了模擬實驗研究的目的、方案、使用設備以及實驗內容，並對實驗數據進行了處理分析，作出了不同模擬條件下單、多孔徑的二次場衰減電壓曲線和一次場等值線圖，找出多孔徑作發射源的探測最佳深度。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。It is based on the principle : under a number of angles, the x - ray attenuation in a cross section of a human body is measured by detector resulting in a set of profiles. this set of profiles is called the radon transform of the object in mathematics. the problem now is to reconstruct a two - dimensional image via inverting its radon transform
它所基於的成像原理是：人體的某個剖面在若干個角度上被x射線束照射，照射后x射線的衰減量被檢測器記錄下來，形成投影集合，數學上將這個投影集合描述為該剖面的radon變換，通過反演radon變換就能夠重建剖面的二維圖像。Computerized tomography ( ct ) is a typical non - invasive examination techniques in medicine, which can depict anatomical structures without damaging the human body. lt is based on the principle : under a number of angles, the x - ray attenuation in a cross section of a human body is measured by detector resulting in a set of profiles. this set of profiles is called the radon transfoim of the object in mathematics. the problem now is to reconstruct a two - dimensional image via inverting its radon transform
它所基於的成像原理是：人體的某個剖面在若干個角度上被x射線束照射，照射后x射線的衰減量被檢測器記錄下來，形成投影集合，數學上將這個投影集合描述為該剖面的radon變換，通過反演radon變換就能夠重建剖面的二維圖像。The reaction mechanism for methanol oxidation at pt / moox / gc composite electrode involved the proton spillover effect from hydrogen molybdenum bronze, and a bifunctional reation mechanism for methanol oxidation by providing a hydrous molybdenum oxide to oxidize the intermediates, coads, for keeping cleaning platinum surface and make it easier for methanol to be oxidized on the clean platinum
通過計時電流圖中的電流衰減情況和cv實驗結果比較可得出， pt moo _ x gc電極催化劑具有一定的抗- co -中毒性能。 pt moo _ x gc的甲醇氧化機理是通過提供水合的氧化物來提高抗co中毒催化性能和質子溢出效應，從而加快甲醇氧化速度的。Echocardiograms are not appropriate as screening tests but are useful for evaluating suspected abnormalities of the heart valves or reduced overall heart function
超聲波心動圖不宜作為一種篩檢試驗手段，但作為評估心瓣膜疑似反常或心臟功能衰減之手段，它仍有利用價值。A system scheme of digital image collection plus spread spectrum communication ( abbreviated as ssc ) is presented in this paper after a full analysis of noise characteristics, attenuating characteristics and impedance characteristics of low - voltage power lines
本文首先介紹了低壓電力線的噪聲特性、衰減特性和阻抗特性，然後提出一種數字圖像採集+擴頻傳輸的系統總體方案。We found that different level coriolis acceleration stimulation had no significant influence on the duration of the illusion but had some influence on the pattern of the illusion, the intensity of ci increased with the levels of coriolis acceleration stimulation, and no significant difference was observed on nystagmus beats, peak slow phase velocity, mean slow phase velocity, time constant of slow phase velocity decay, duration of eng among different coriolis acceleration stimulation, but the direction of eng is consistent with the pattern of ci
結果發現：不同強度的科里奧利加速度刺激對錯覺形態具有一定影響，錯覺持續時間、錯覺強度隨科里奧利加速度的增加而增加，不同科里奧利加速度刺激下的眼震電圖，其眼震方向與錯覺形態是一致的，但無論是水平性眼震還是垂直性眼震，眼震次數、最大慢相速度、平均慢相速度。慢相速度衰減時間常數、持續時間等參數均無顯著性差別。If we were to try burying our detectors in order to attenuate the surface waves, we would soon grow discouraged.
如果企圖用埋置檢波器的方法來衰減面波，很快就會發現這種做法是徒勞的。The work including : ( 1 ) svm based auto detection and segmentation of left ventricle mri image the aim of the segmentation of the left ventricle mri image is to find out the inner and the outer contour of the left ventricle, while for that the structure of the heart is very complex, meantime the tag lines may also decay, the contrast of the object and the background will also descend, which still make the segmentation more difficult
同時，對核空間方法在圖像處理領域的幾種應用進行了論述。本文工作包括： （ 1 ）設計基於svm的mri左心室圖像的自動檢測及分割過程心臟mri圖像分割的目的是為了找出mri圖像中左心室的內外輪廓，但是由於心臟的解剖結構非常復雜，再加上標記線會隨時間衰減，目標和背景的對比度會下降，這使得圖像的自動分割更加困難。Owing to slow recessing and long travel distance of the uhf radio waves, this system can transmit the images in tunnel and implement active talk
此系統利用無線高頻電波在隧道中衰減慢、傳輸距離遠的特性，實現了洞內圖像的傳輸和洞內、外語音交互。From the point of kinematics and dynamics, the author analyses the propagation rules of stress waves in concrete, namely time - space relations, wave amplitude attenuation, dispersion effect and characteristics of transmission of reflected waves and acoustic waves. combining with engineering practices, the author also concluded the main points of low strain detection of integrity of longdiameter underwater cast - in - situ piles, and pointed out that comprehensive and relational utilization of reflected waves method and acoustic wave transmission method can accurately evaluated the integrity of pile shaft and then improve the reliability of detection. 6figs., 3refs
從運動學和動力學角度，分析應力波在混凝土中的傳播規律：時空關系、波幅衰減、頻散作用以及反射波與聲波透射的特點，結合工程實踐，總結大直徑水下灌注樁低應變檢測的工作要點，指出綜合、合理運用反射波法與聲波透射法，可以較準確地評價樁身完整性，提高檢測結果的可靠性.圖6 ，參3This algorithm uses the profiles collected from a number of angles to compute the x - ray attenuation coefficient of a cross section inside the body, then reconstruct the image of the cross section
該演算法利用從各方向測量出來的投影值求出物體內部受檢斷面各點的x射線衰減系數，從而重建出整個人體橫截面的圖像。Tgs method utilizes a high - purity germanium ( hpge ) detector with large volume to perform low - resolution tomographic transmission scans on each layer and yield absolute images of the matrix ' density
測出的線衰減系數是絕對值，成像只要求低分辨。然而， tgs有ct測量所沒有的發射測量和圖像重建的問題。In this paper the injection dispersion in an oscillatory flow mixer has been studied by using the flow visualization technique with a solution of blue dye as the tracer. the process of injection dispersion was monitored with a digital camera connecting to a computer that treated the video data stream synchronously to obtain the attenuation curve of relative deviation of the flow image ' s gray scale values
實驗採用以藍色有機染料為示蹤劑的流動顯形技術，由攝像頭實時攝取注入分散過程的動態圖像，計算機同步分析視頻流數據，從而以在線監測的方式獲得流場圖像的灰度相對方差隨時間衰減的曲線。分享友人