查询词典 finite difference approximation

Based on the theory of tidal flow and sediment motion, a 2-D depth-integrated mathematical model for the Jiaojiang Estuary is developed by using explicit scheme of finite difference on the triangle elements. The results show that the rotary currents occurring in this area can be simply and effectively simulated by the model. Meanwhile, the suspended sediment concentration simulated is in agreement with the field data.

本文根据椒江口实测水文地形资料，从平面二维水流泥沙基本方程和基本理论出发，采用三角单元有限差分法对水流泥沙方程显示求解，对椒江口潮流泥沙进行了数值模拟，模型简单实用，较好地再现了具有旋转潮波性质的椒江河口水流运动特征，含沙量场也得到了基本正确的反映。

Temperature field evolution of metallic glass in quartz tube is simulated by using finite difference method.

numerical simulation ；利用有限差分方法模拟了一个石英管内非晶合金冷却形成过程温度演变过程，并观察了冷却过程中的不同部位在不同时刻的冷却速度的变化。

In the surveys, some very closely spaced survey lines displayed remarkable differences in crustal structure. To find the reasons for the differences and to analyze the reliability of crustal structure, ocean bottom seismometer data from the west and east sides of the Dongsha Islands were reprocessed and inverted with tomography technique. The routine processing and inversion procedures include clock correction, position correction, finite-difference ray-tracing-based tomography, checkerboard test and comparison of the inverted crustal model with initial models. As a key step, we analyzed the lateral velocity resolution and smoothed out the short wavelength velocity variation which maybe most probably artifacts in the final velocity models.

在一些相隔很近的测线上，探测的深部地壳结构却相差较大，为了分析这些探测结果中差异的原因和地壳结构变化的可靠性，本文以东沙东侧海域测线和东沙西侧海域测线为例，对采集的海底地震仪记录进行了时间、位置校正和初至波走时拾取，利用有限差分地震走时层析成像进行了走时反演，获得所在剖面的地壳速度结构，并分析了模型的横向分辨率，剔除模型中短波长的横向速度变化。

First,we construct the finite difference scheme of the equation,the existence and the uniqueness of the solution for the scheme are proved.

首先，构建原方程的有限差分格式，并验证了差分格式解的存在唯一性。

The text is detailed to study the deducing process of the nodal finite difference equation, and to study its application hi the rock mass engineering problems.

本文详细研究了节点有限差分运动方程的推导过程，以及在岩土工程问题中的应用。

Use of the finite difference method for Volterra equation here as a variable element of the equation, As the same...

用差分方法求解沃尔泰拉方程，此处为一个变元的方程，由于该方程同时含有微分和积分，一般求解有一定的困难。

Firstly , one energy conservative finite difference scheme for SRLW equation of two levels and two of three levels are proposed in this paper.

所提的格式严格保持了方程原来所具有的守恒律。

It is show that if one chooses the field points appropriately, the set of finite difference equation is applicable for a boundary condition involving perfectly conducting surfaces.

如果选定恰当的域点，差分方程组加上适用的边界条件可以很好的模拟表面。

The other solves the non-steady heat conduction equation by finite difference method.

发展了两个太阳能固体吸收式制冰机的动态模拟程序，差别在于对反应器内的传热过程采用了不同的计算方法，其一采用反应前锋假设，其二采用有限差分方法求解非稳态的热传导方程。

To gain some idea of the accuracy of the finite difference equation, we have used the system (14a)-(14c) with the initial E, being a half sine wave for the case of no obstacle.

获得一些想法的正确性有限差分方程，我们所使用的系统(14a的规定)-(14c)与最初的E、半正弦条件下的任何障碍。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。