模拟

The model is used to count several engineering example.Comparing the 2D numerical results with electrical simulations,it is proved that the seepage model can count the seepage surface and the location of search results in dam well and truly.Comparing 3D results with 2D results at close section,the results are tally well except the difference of meshes and the interceptive position of section.So the model is credible and has upper practicality value.In the projects,the spending of account is increasing because of the bigger account field.

将饱和—非饱和渗流模型用于几个工程实例，其二维模拟结果同渗流电模拟实验结果进行了对比，证明本文的渗流模型完全能够准确计算坝内的渗流浸润线以及逸出面位置；三维数值模拟的结果在相近剖面处与二维结果作了比较，考虑三维网格剖分及剖面截取位置的差异，三维结果与二维结果吻合的较好，证明本文的饱和—非饱和渗流模型在三维计算中是可靠的且具有较高的实用价值。

The outputs from the ensemble simulation are analyzed using the three basic interpretational methods commonly used in the ensemble forecast; the consequence is that it is practicable to introduce ensemble technique in regional climate study. Th...

以集合预报的 3种基本释用方法，对集合模拟产生的大量输出结果作了细致的分析，发现在区域气候模拟中，引入物理集合是可行的；它为区域气候数值研究提供了更多的手段和信息；集合系统存在的不足之处在于：集合成员间离散程度不足、集合模拟范围较狭窄，这使得离差对误差的实际预报能力低于潜在预报能力，也使集合概率预报的精度降低。

It is difficult to be simulated and analyzed due to the excessive surfaces, complex structure and locomotory parts in zoom lens. All the transmission planes taken as the partial reflection and partial transmission planes were simulated with ASAP（advanced system analysis program）and the stray rays on "dangerous surfaces" which easily generate the ghost images in zoom lens were analyzed. Based on it, the zoom lens was optimized and the quality of image was improved by changing the curvature and refractive index of the second reflection planes.

利用ASAP软件模拟每个透射面作为部分透射、部分反射的表面，对变焦光学系统非轴上光进行分析，模拟出变焦系统的光学元件表面和光机内壁，实行实际光线追迹，然后以像面为研究对象，进一步实施实际光线追迹，模拟出全部散射光在像面上的能量分布，找出鬼像形成的原因，并在此基础上通过改变二次反射所在面的曲率或改变所在面的折射率两种方法对变焦光学系统进行优化，减小鬼点数目，以提高系统的成像质量。

This method makes the general average loss of the losses for fail report and misdeclaration to be minimum, and make up for the lower degree of accuracy of debris flow forecast in a certain extent.

利用泥石流运动数值模拟和GIS技术相结合的方法对泥石流在出山口后的运动和堆积过程进行数值模拟和危险性分区，创建了泥石流运动数值模拟和危险性分区的新方法。

On the basis of study on a couple of prevailing fieldbus,combined with the development of fieldbus-based simulated monitoring system of marine engine room in Qingdao Ocean Shipping Mariners' College,which the author joins,the design and technical features of fieldbus systems are analyzed,the advantages to adopt fieldbus technology in narine engine room are discussed,the basic operating principle of LonWorks fieidbus is approached,the structural scheme of LonWorks bus-based monitoring and alarming system simulator of marine engine room is proposed,and the buildup and function thereof are detailedly expounded to some extent.

本文结合作者参加的青岛远洋船员学院机舱监测报警模拟系统的科研工作，在研究了当今流行的几种现场总线的基础上，分析了现场总线系统的结构特点和技术特点，论述了在船舶机舱中采用现场总线技术的优越性，探讨了LONWORKS总线的基本工作原理，提出了基于LONWORKS总线的船舶机舱监测报警模拟系统的构造方案，并对该监测报警模拟系统的组成、功能等进行了比较详细的论述。

On the basis of study on a couple of prevailing fieldbus,combined with the development of fieldbus-based simulated monitoring system of marine engine room in Qingdao Ocean Shipping Mariners' College,which the author joins,the design and technical features of fieldbus systems are analyzed,the advantages to adopt fieldbus technology in narine engine room are discussed,the basic operating principle of LonWorks fieidbus is approached,the structural scheme of LonWorks bus-based monitoring and alarming system

摘要本文结合作者参加的青岛远洋船员学院机舱监测报警模拟系统的科研工作，在研究了当今流行的几种现场总线的基础上，分析了现场总线系统的结构特点和技术特点，论述了在船舶机舱中采用现场总线技术的优越性，探讨了LONWORKS总线的基本工作原理，提出了基于LONWORKS总线的船舶机舱监测报警模拟系统的构造方案，并对该监测报警模拟系统的组成、功能等进行了比较详细的论述。

This paper also describes microscopic mechanical behavior of foam metal materials phenomenologically by means of combination of experiments and numerical simulation, simulates dynamic and static response of foam aluminum structures by means of FEM, and simulates large deformation elastic-plastic behavior of foam aluminum structure under static and dynamic loads with accuracy.

本文还利用实验和数值模拟相结合的方法，以唯象的本构模型描述了泡沫金属材料的宏观力学行为，采用有限元方法模拟了泡沫铝结构的静、动态响应，较准确的模拟了泡沫铝结构在静态、动态载荷作用下的大变形弹塑性行为。

In this study, based on the Rnl, extinction coefficient k, transition coefficient of canopy layer stomatic resistance K', aerodynamics resistance ra and rc calculated with the data of Rn, LAI, rsi, the daily transpiration variation of Picea purpurea, Larix principisrupprechtii, Hippophae rhamnoides ,Betula platyphylla and Populus cathayana were studied in Datong County, Qinghai Province. Comparing with the practical transpiration variation measured by Li1600 Steady Porometer, the relative error of this model was less than ±15%, and the results were stabilized and tested by precision analysis.

本研究通过对Rn、LAI、rsi的实地观测，确定了林冠截流净辐射、消光系数、冠层阻力转换系数、空气动力学阻力和冠层整体气孔阻力，对青海大通地区紫果云杉、华北落叶松、沙棘、白桦和青杨的日蒸腾过程进行了模拟，与用快速称重法订正的Li1600稳态气孔仪实测蒸腾结果对比，模拟的相对误差在±15%以内；模型敏感性分析发现，温度、LAI以及rsi是决定模拟结果的主要参数，模型对各参数变化反应不敏感。

The computational cost of the scheme is greatly reduced comparing with pseudospectral modeling of the two-way equation.

就模拟一次反射地震波而言，与前人研究的双程波动方程伪谱法地震波模拟相比，本文算法具有足够高的模拟精度，且计算效率成倍地提高。

In order to check the correctness and reliability of direct numerical simulation of the three-dimensional turbulence with the moderate or low flow Reynolds number, this paper adopts the pseudospectral method to direct numerically simulate the three-dimensional plane mixing layer.

为了验证直接数值模拟三维中低流动雷诺数湍流的正确性和可靠性，该文采用拟谱方法对三维平面混合层流场进行了直接数值模拟，并将数值模拟得到的结果与 Lasheras 等的平面混合层经典实验结果进行了对比。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。