The characteristic approximation is used to handle the convection part along the direc-tion of fluid namely characteristic direction to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion; The mixed finite element spatial approximation is employed to deal with diffusion part and approximate the scalar unknown and the adjoint vector function optimally and simultaneously; In order to preserve the integral conservation of the method, we introduce the modified characteristic method.

該方法對方程的對流部分沿流體流動的方向即特征方向離散以保證格式在流動的鋒線前沿逼近的高穩(wěn)定性首页国内自拍偷拍视频，消除數(shù)值彌散現(xiàn)象美国特黄视频；對方程的擴散部分采用最低次混合有限元方法離散99re9精品视频、同時以高精度逼近未知函數(shù)及未知函數(shù)的梯度清风阁黄色视频；為保證方法的整體守恒性，在格式中引入修正項亚洲综合精品。

Our difficulties are overcome in this paper by using the method of generalized normal sectors, provided by [Nonlinearity 17(2004): 1407-1426], which allows curves and orbits to be part of its boundary, may not be an angular neighborhood of the characteristic direction.

通過利用文獻[Nonlinearity 17(2004)看免的毛片视频强奸，1407-1426]中提出的廣義正常區(qū)域方法，我們的困難得以克服人人爽人人色人人操，其中允許曲線或者系統(tǒng)軌道為廣義正常區(qū)域的邊界国产东北老妓女视频在线播放，而且該區(qū)域也不一定是要研究的特殊方向的角形鄰域。

Douglas and Russell first presented the idea of characteristics in[13],in whichthe diffusion term is included in the derivative of characteristic direction of the solu-tion and the backward difference quotient along the time axis was replaced by it alongcharacteristic direction.

Douglas一级A片C视频，Russell[13]最先提出了特征法的思想激情另类文学，其主要特點是將模型方程的對流項隱含在解沿特征方向的導數(shù)之中，以沿特征方向的向后差商逼近取代通常方法中沿時間方向的向后差商逼近裸体美女天堂久久污黄40。

Beginning with the distinctive connotation of class characteristic culture in universities, the paper analyses the significance of the construction of class characteristic culture and then points out the construction direction.

本文從高校班級特色文化的獨特內涵入手黄色网站免费看丝袜，分析了構建班級特色文化的重要意義，明確了班級特色文化的構建方向一级黄色录像蛊一区二区三区，提出了構建班級特色文化的相關措施。

According to that characteristic and based on the differential equation of the deformed surface of the orthotropic plate, with one principal direction size fixed, changing another principal direction size linearly, maintaining elasticity coefficient the same as in the first principal direction and Poisson ratio equal to the geometric mean of two principal Poisson ratios, the original orthogonal plate is equivalent to an isotropic plate. Results obtained show that the deflections of the equivalent isotropic plate are the same as the deflections of the original orthotropic plate at the corresponding points, the forces of the correspondent points have simple relations.

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In point of the physical characters,it is better to differentiate the time derivative in the characteristic direction than intime direction.

1.4中針對流體的流動以對流為主的物理特性，采用特征線法去對時間導數(shù)項離散影音先锋在线观日韩，使截斷因子比通常的時間方向離散小得多熟女人人操，更好地反映了問題的物理特性欧美一级二级国产。

At the same time, taking a case study as the supplement, I analyze the present situation of one characteristic of the attention direction and think of some prompt sentences in order to improve the situation of the attention direction.

最后，運用個案研究作為補充嗯,啊,好爽骚,好湿,黄色视频，分析了不同成績學生注意指向在敏銳性方面的現(xiàn)狀及存在的可能原因在线免费看黄国产，并考慮用一些提示語來提高中學生注意指向的敏銳性。

According to characteristic of model parameters, direction criterion based on model parameter identifying is proposed to decide the direction of faults.

本文提出了一種新的基于模型參數(shù)識別的快速方向元件在线观看avvvv，即將線路分別等效為R-L模型中文字幕日韩高清第一页视频、T模型和Π模型，然后建立相應線路等效模型下區(qū)內特黄AAA片视频在线播放、區(qū)外故障時的數(shù)學模型色欲综合网久久久绝顶高潮，利用最小二乘法求解模型參數(shù)—系統(tǒng)電阻R和系統(tǒng)電感L，根據(jù)得到的模型參數(shù)的特性天天插天天干天天操，構造出基于模型的參數(shù)識別方向判據(jù)狼友网在线观看，從而判斷出故障的方向。

These algorithms firstly get the characteristic of line from the normal part, and then track the line under the guidance of the characteristic direction, so that it can track through intersection or overlapping parts to recognize an entire line in one step.

這些方法在線條的無干擾部分搜索其特征爽了又爽avav，然后在特征方向的指導下進行跟蹤A级免费黄色片，可以避免線條上相交、粘連部分的干擾色多多成视频人在线观看，完整地識別線條日韩精品视频蜜臀视频网站。

The paper sees Horton code as a primary characteristic value and generalizing condition of the river network, and selects, simplifies and generalizes river based on scale of before and after generalization,, The main contents of paper include:(1)Reviews generalization concept, arithmetic operators, methods, influence factor and frame of map generalization and design, analyze core theory of feature —oriented map generalization, discuss the main context and applicable method of river feature generalization(2) Summarizes natural form and spatial configuration characteristic of the river network, and describe the river network using digraph Paper mostly researches tree —like river, identifies the direction of river based on the angle of the main and secondary reach, and identifies the main river based on most length and predominant continuation of the flow direction along the major channel , then receives the grade of river by recursion and structuralize river network, builds hiberarchy rank system of river based on Horton coding(3)Designs the model of river network based on Horton code, and organizes the data of node, branch and river.

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