A new numerical method for the fractional integral that only stores parthistory data is presented,and its discretization error is estimated.

提出了一種只需要存儲(chǔ)部分歷史數(shù)據(jù)的分?jǐn)?shù)積分的數(shù)值計(jì)算方法，并給出了誤差估計(jì)800avcvm。

Thedecision of whether further refinement of meshes is necessary is based on the estimateof the discretization error.

我們還將移動(dòng)網(wǎng)格方法應(yīng)用于靜態(tài)問題国产精品久久婷婷人人爽，并在其中研究使用后驗(yàn)誤差估計(jì)來構(gòu)造控制函數(shù)的方法。

Due to discretization error of image points and inevitable location shifts embedded in feature extraction processes, the parameters of a line determined by two feature points must possess some uncertainties.

由于圖像特征點(diǎn)的離散誤差和特征點(diǎn)提取過程中的位移現(xiàn)象国产精品黄色在线观看，使得由二圖像點(diǎn)所確定的直線的參數(shù)隨之產(chǎn)生某種不確定性大色欧美。

The nonlinear sliding mode controller is taken as an example, the implementation form of δ operator discretization control, the error analysis and the algorithms stability are studied both theoty and engineering application.

數(shù)值仿真表明，當(dāng)高速開關(guān)閥的節(jié)流孔流量系數(shù)色综合久久加勒比中文字幕、摩擦片的磨損量午夜三级A三级三点自慰、摩擦系數(shù)、傳動(dòng)系的彈性系數(shù)等因素在允許范圍內(nèi)變化時(shí)国产一级美女黄片A，滑睦细九越洗竺悠礎片那里有？刂破鞯母櫿`差遠(yuǎn)低于一般的PID控制器。

There are a great many L-shape structures in modern designing, which induce stress concentration and singularity. The dependence of the discretization error on the mesh refinement of such structures of fillet and connection point is of particular evidence.

結(jié)構(gòu)設(shè)計(jì)中廣泛存在L-型結(jié)構(gòu)往往導(dǎo)致應(yīng)力集中和應(yīng)力奇異性jizz国产视频，有限元離散過程很大程度上影響了L-型結(jié)構(gòu)角點(diǎn)附件的位移和應(yīng)力數(shù)值解精度五月草视频。

Fourth precision solution can be derived from two grid sets solution with a second precision central difference scheme by Richardson extrapolation. It reduces the amount of calculation. Uncertainty is determined from the discretization error analysis. A finer grid calculation is made to validate the extrapolation scheme.

對(duì)于2階精度中心差分格式的2套網(wǎng)格數(shù)值解，用Richardson外推法可以得到4階精度的解aA电影黄色电影网，其工作量比直接求解4階離散方程的工作量減少許多日韩欧美,另类；對(duì)于計(jì)算中的數(shù)值不確定度，用該方法分析了離散誤差操逼亚洲色，并用逐次加密網(wǎng)格的方法探討了外推法的合理性午夜影院性。

The auxiliary technologies for hexahedral mesh generation are studied thoroughly in this article. The technologies mainly cover the parametric description of three-dimensional geometric solid boundary, the controlling of mesh precision by imposing maximum geometric discretization error, the topology analysis of mesh, the optimization of node labeling and the display of mesh with removed hidden lines.

對(duì)六面體網(wǎng)格生成的輔助技術(shù)進(jìn)行了較深入的研究免费观看国产嫖妓视频，其中主要討論了三維空間幾何實(shí)體邊界的參數(shù)化描述26uu另类自拍、利用最大幾何離散誤差來控制網(wǎng)格的離散精度、在對(duì)網(wǎng)格的拓?fù)潢P(guān)系進(jìn)行正確分析的基礎(chǔ)上提出改進(jìn)的節(jié)點(diǎn)編號(hào)優(yōu)化算法以及快速的網(wǎng)格消影顯示等技術(shù)18到20岁女人毛片一区。

For the diffractive optical element realizing beam shaping in the fractional Fourier transform domain,the transform matrix calculated by the discrete sampling points was compared with that calculated by the Fresnel integral,and the discretization error of the intensity distribution on the output plane was qualitatively obtained.

針對(duì)分?jǐn)?shù)傅里葉變換衍射光學(xué)光束整形器件国产毛片不卡在线视频，比較了按離散點(diǎn)與按菲涅耳積分計(jì)算得到的變換矩陣間的差距，從中分析得出按離散點(diǎn)計(jì)算的變換矩陣引入的離散化誤差與分?jǐn)?shù)傅里葉變換系統(tǒng)參數(shù)的關(guān)系8X永久华人成年免费网站。

DSP is used to realize digital controllers of velocity-loop and position-loop. Analyze and validate that dividing high-level continue controller to several low-level controllers, then discretize the low-level controllers to form series controller can depress the discretization control error.

采用DSP實(shí)現(xiàn)速度環(huán)和位置環(huán)的數(shù)字控制器久久再先视频，分析并驗(yàn)證了連續(xù)域高階控制器分解成連續(xù)域低階控制器，將低階控制器離散后進(jìn)行串聯(lián)控制精品国性色无码AV网站，這種實(shí)現(xiàn)方式的數(shù)字控制器與連續(xù)域控制器之間的控制誤差不卡毛片在线观看，將遠(yuǎn)小于直接將連續(xù)域高階控制器離散成高階數(shù)字控制器產(chǎn)生的控制誤差。

To solve this problem, new oblique hypersurface discretization method is presented.

連續(xù)屬性的離散化是粗糙集理論的主要問題之一www.//黄片视频免费。