The set of absorbing boundary conditions based on paraxial approximations of 3-D elastic wave equations are applied to the numerical boundaries.

在此基礎(chǔ)上進(jìn)行了三維鹽丘地質(zhì)模型的地震波傳播數(shù)值模擬試算一级黄色视频在线免费播放A级。

In this paper, on the base of paraxial approximations, we present a set of absorbing boundary conditions of 3D elastic wave equations and apply to the 3D elastic wave numerical modeling in isotropic medium.

本文基於傍軸近似法提出了計(jì)算三維彈性波方程的吸收邊界條件公式亚洲一区二区视频观看，表示了各邊界面国产欧美日韩A片、邊棱和角點(diǎn)處波場(chǎng)所滿足的單程波方程美女被插逼逼，并在三維彈性波數(shù)值模擬中進(jìn)行了應(yīng)用欧美操屄视频在线播放。

There are various techniques for constructing analytical approximations to the nonlinear differential equation.

早期研究非線性振動(dòng)的理論分析方法多局限於弱非線性振動(dòng)系統(tǒng)亚洲午夜无码久久yy8090，碰到強(qiáng)非線性振動(dòng)系統(tǒng)就顯的無能為力。

An asymptotic expansion of the errors with O(h3) is shown. Therefore , by using extrapolation we can improve the accuracy order of approximations.

該方法的優(yōu)點(diǎn)在于奇點(diǎn)處權(quán)函數(shù)的選擇a日韩精品在线看，并且證明了誤差有h3冪漸進(jìn)展式亚洲中文人妻，從而可以利用外推達(dá)到加速收斂的目的800AV凹凸视频免费观看网，更好地提高了計(jì)算精度。

By combining the two good linear approximations with the best linear approximations we present improved algorithms which could increase the attacking speed.

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Pickover's other criteria seem to be that a law should be at least moderately important and should hold true — with the usual caveats about appropriate circumstances and approximations.

Pickover還羅列了其他幾條評(píng)判標(biāo)準(zhǔn)包括一條定律至少應(yīng)該相當(dāng)重要和能夠真實(shí)成立——在特定的適用條件和近似下美女b网站。

In theory of approximations, the classic methods of polynomial approximation for rational expression are various interpolations and operator approximations, such as Lagrange interpolation, Hermite interpolation and Bernstein polynomial approximation.

在逼近論中欧美性爽交大全，用多項(xiàng)式逼近有理式的經(jīng)典的方法是各種插值與算子逼近方法，如Lagrange插值一级黄色视频免费网站、Hermite插值和Bernstein多項(xiàng)式逼近等jjzzwww。

In order to avoid the Maratos effect,the merit function s used are approximations to Flether s differentiable exact penalty function,and the algorithm updates approximations to one-sided reduced Hessian and two-sided reduced Hessian seperately.

為避免Maratos效應(yīng)，我們采用Flether的光滑精確罰函數(shù)的逼近形式作為價(jià)值函數(shù)91色色视屏，并且分別對(duì)Lagarange函數(shù)的單邊既約Hessian的近似陣和雙邊既約Hessian的近似陣進(jìn)行校正美女18禁止看的扒开奶罩网站。

Authors made use of shifted perspective, orthographic projection, approximations of axial or lateral projection, and approximations of parallel projection in illustrations depicting the detailed structures of machines and devices.

作者運(yùn)用等同于移動(dòng)透視、正投影AAA亚洲无码高清、近似軸測(cè)投影和近似平行投影的畫法和文字解說表達(dá)出機(jī)械性色av免费精品观看、器物等的詳細(xì)構(gòu)造。

The accuracy of safe approximations is discussed. The computation method of safe approximations is put forward.

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