In order to solve the problem,We proposed a simple formula for computing paraxial travel time of single-way wave operator. The formula is based on the forward and inverse transform between time-space domain to frequency-wavenumber domain and from vector field to exponential manifold. The travel time are expressed as polynomials of the horizontal offset between the two points, and the single-square-root operator in frequency-wavenumber domain are expressed as polynomials of wavenumber. Coefficients of travel time polynomials and that of single-square-root operator are related each other and calculated by Lie algebraic integrand, exponential map and the saddle-point method.

針對此在线免费看一级片，基于時間空間域到頻率波數(shù)域和向量場到指數(shù)流形上的正反變換欧美xxxxx又大又粗，提出了計算單程波算子旁軸走時的簡便公式欧美老妇性挿肛，將走時表示成空間變量(地面點到地下相點的水平距離)的多項式乱人伦人妻中文字幕app，將頻率波數(shù)域單平方根算子表示成波數(shù)的多項式性爱视频A级，運(yùn)用Lie代數(shù)積分欧美精品强奸视频、指數(shù)映射和鞍點法將走時多項式的系數(shù)與單平方根算子的系數(shù)聯(lián)系起來，運(yùn)用單平方根算子的系數(shù)計算走時多項式的系數(shù)A片强奸少妇毛片按摩。

In order to solve the problem, We proposed a simple formula for computing paraxial travel time of single-way wave operator. The formula is based on the forward and inverse transform between time-space domain to frequency-wavenumber domain and from vector field to exponential as polynomials of wavenumber. Coefficients of travel time polynomials and that of single-square-root operator are related each other and calculated by Lie algebraic integrand, exponential map and the saddlepoint method.

針對此99伦乱视频，基于時間空間域到頻率波數(shù)域和向量場到指數(shù)流形上的正反變換，提出了計算單程波算子旁軸走時的簡便公式国外一区二区三区黄色录像，將走時表示成空間變量（地面點到地下相點的水平距離）的多項式手机一级在线视频，將頻率波數(shù)域單平方根算子表示成波數(shù)的多項式，運(yùn)用Lie代數(shù)積分在线观看黄片精品、指數(shù)映射和鞍點法將走時多項式的系數(shù)與單平方根算子的系數(shù)聯(lián)系起來视频欧美日韩，運(yùn)用單平方根算子的系數(shù)計算走時多項式的系數(shù)。

In this paper,we build symplectic structure of 2-nd order and high order singular differential operators on infinite interval, we construct a symplectic space by the maximal and minimal operator domain .

本文研究了無窮區(qū)間上二階成年女人特黄av免费、高階奇型微分算子的辛結(jié)構(gòu)中文字幕av人妻一本二本，利用最大與最小算子域構(gòu)造了一個辛空間，用辛空間中的線性流形來刻畫定義在無窮區(qū)間上二階800av.com在线免费看、高階奇型對稱微分算子的自共軛擴(kuò)張問題91人妻论坛社区。

The difficulty of CT reconstruction increases in non-medicinal fields, for the reason that the short action time and the limited operator domain of the physical fields being measured.

CT重建在非醫(yī)學(xué)領(lǐng)域，由于被測量的物場具有作用時間短18污视频网站在线免费观看、作用域小等特點精品久久国产精品99国产，從而加大了難度。

Edge detection is one of the important roles in the digital image processing, the Prewitt operator, LOG operator and Canny operator are adopted in the classical edge detection operator arithmetic in space domain.

邊緣檢測是數(shù)字圖像處理的一個重要內(nèi)容美女裸体视频久久，討論了經(jīng)典的邊緣檢測算子算法国产在线一区无码视频久，該算法更多地采用Prewitt算子、LOG算子很很操很很爆操爆视视、Canny算子等在空域中進(jìn)行亚洲国产精品三区第一次。

On the one hand, because of the short action time, it is impossible to get enough time to circumvolve instruments or to circumvolve the physical fields being measured so as to scan in all directions, so the physical fields can only be measured through several instruments; on the other hand, because the physical fields are partly screened or the operator domain is too limited, the measurement directions are limited, too.

一方面，因為作用時間短黄片四区，不可能有充足的時間使儀器旋轉(zhuǎn)或使被測物場旋轉(zhuǎn)來全方位掃描国产精品视频拍自网站，只能固定幾個方位的探頭同時進(jìn)行測量；另一方面伊人一本精品久久久久，由于物體被部分遮擋或作用域小影音先锋日韩在线资源，使觀測方位受到限制中文在线天堂网www官网，也只能在測量中用少量的探頭。

It carries out the amplitude-preserved migration with the phase shift amplitude-preserved correction operator in frequency-wave number domain and time shift amplitude-preserved correction operator in frequency-space domain.

文中引入了裂步傅里葉保幅偏移算法中文字幕日本黄色视频，分別通過頻率－波數(shù)域的相移保幅校正算子和頻率－空間域的保幅時移校正算子實現(xiàn)了保幅偏移加勒比在线精品观看。

Author, secondly, starts from the approximate expandness of square root operator, perform mathematical calculations for finite difference operator in frequency-space domain, Fourier finite difference operator in mixing domain(frequency-space and frequency-wavenumber domain) and general screen operator in mixing domain, compare and discuss their precision of their wavefield, adaptability for lateral velocity variations, computation efficiency and stability.

第二，從平方根算子的近似展開出發(fā)對頻率—空間域的有限差分算子欧美激情a片免费专区、混合域(頻率—空間域6080无码吃奶在线观看视频；頻率—波數(shù)域)的Fourier有限差分算子、混合域的廣義屏算子進(jìn)行了推導(dǎo)并對其波場描述精度91超碰在线中出、對橫向變速的適應(yīng)性超碰在线免费公开干、計算效率和穩(wěn)定性進(jìn)行了比較與評述。

According to the different orientations of domain walls with respect to the (100) observation plane of a foil, 90°domain boundaries may be divided into two kinds. one is thin lens or ring shaped a-a 90°domain boundary, and the domain wall lies on the {110} plane; Usually, most of these domain boundaries are uncharged; according to the extinction rules for the (011) domain walls, the displacement vector 〓 along 〓 can be dertermined, which is parallel to the line of intersection between the domain wall and the plane consisting of spontaneous polarization vectors on both sides of domain boundary; from selected area electon diffraction of crystals including domain boundary, we not only examine slight difference in the crystal parts on both sides of the domain boundary, but also obtain crystallographic relationship between them, that is, there exists a 180°rotation symmetry operator along a normal of domain wall. The other is Z or ring shaped a-c 90°domain boundary along {010} direction, and the displacement vector 〓 runs along 〓 direction.

根據(jù)界面相對于樣品中(100)觀測面取向的不同月综合网，90°疇可分為兩類：一類為薄透鏡片狀或環(huán)狀的a-a90°疇无码网站色哟哟在线观看，其界面平行于{110}，多數(shù)不帶電欧美极品A片小视频在线看，由消光規(guī)律可確定其位移矢量平行于疇界面與自發(fā)極化所在平面的交跡美女张开腿被弄到高潮视频，即，〓方向久久一级黄色毛片，而從包含疇界的選區(qū)電子衍射圖可知黄色毛片免费看永久，這種不帶電的90°疇界兩側(cè)存在微小的取向差，其界面兩側(cè)的結(jié)晶學(xué)關(guān)系為以界面法線為二次軸的旋轉(zhuǎn)關(guān)系视频日韩午夜在线播放网站免费；另一類為Z狀或環(huán)狀的a-c90°疇91后入国产在线，其界面平行于[010]或[001]，相應(yīng)的位移矢量為〓方向97.riav。

An improved shift operator finite-difference time-domain method for general dispersive medium based on the implementation of infinite impulse response filter in digital signal processing technique is presented.

借鑒數(shù)字信號處理技術(shù)中的無限脈沖響應(yīng)濾波器實現(xiàn)的思想美女a视频网站，提出一種適用于通用色散介質(zhì)的改進(jìn)移位算子時域有限差分（shift operator finite-difference time-domain，SO-FDTD）方法国产综合91。