模拟

In this paper, we contribute an evolutionary heterogeneous beliefs model byusing t distribution to replace traditional standard normal to describe fundamen-tal price process and adding risk-adjusted market fraction function in classicaltwo types traders scheme. And then we utilizedifference equation stability and bifurcation theory and numerical simulation tostudy the system. It is found that the system has some styled facts (high kurto-sis、fat tali and long memory) of the actual financial market, and this indicatesthat the simulation model can reflect well the true financial market.

本文通过引入t分布代替原有的正态分布描述基础价格过程，引入经风险调整的投资者市场分数维函数取代原有的无风险调整的市场分数维函数，在经典的两类投资者(自主投资者和图表分析者)模拟模型框架下，建立了新的异质预期资产定价模型，利用差分方程稳定性和分支理论及数值模拟的方法对该系统进行理论分析和实证研究，发现模型具有真实金融市场的程式化事实(尖峰厚尾性，长记忆性等)，模拟效果较好。

We also using numerical simulations to exam the optical properties of the diffractive structures, and theorically explain how the diffractive can work as a PBS, and also anchoring LC molecules.

在模拟方面，本论文利用三种不同的数值方法(FEM、FDTD、RCWA)进行光学模拟，并与实验进行对照比较，除此之外也将数值模拟视为是设计与改良绕射结构的重要工具。

The field survey, sampling, testing and collection of the geological and hydrogeological data were done for the description of evolutional geological structure and sedimentation and division and definition of water-bearing system and hydrogeological age and hydro-pressure system and study of the vadose field and chemical field. By establishing the rammer numerical model, the sandy mudstone thickness recovery model, water-rock interaction particle translative simulation and hydrogeochemical simulation, and using geological statistics, analogism and complex analysis method, water circulation and water exchange of each layer in each study stage have been researched, The results show the regularity of the vadose field evolution in different stages.

本项以野外调查、采样测试和搜集的地质、水文地质大量第一性资料为依据，在论述盆地的地质构造演化、沉积演化的基础上，以含水系统、水文地质期和水压系统类型的划分和定位为研究的切入点，渗流场、化学场为研究主线，通过建立压实数学模型、砂泥岩恢复厚度数学模型、水岩作用物质成分转移的实验模拟、水文地球化学模拟、地质统计法、类比法、综合分析法等方法，模拟计算了各研究层在各研究时期水循环特点和水交替强度，揭示了各研究层渗流场在地史进程中形成演化的规律性。

By adopting the calculating analysis method of elastic-plastic three-dimensional FEM numeric simulation, this paper makes a simulation analysis on the structure stability of the shallow cover and unsymmetrically loaded parts in Tongyoushan tunnel, mainly simulates the effects caused by different construction orders on surroundings and supporting structure stability, and it centers on the analysis on the weak part, the midwall in the lining of the connecting-arch tunnel.

采用弹塑性三维有限元数值模拟计算分析的方法，对桐油山隧道浅埋、偏压地段结构稳定性进行了模拟分析，主要模拟了不同施工顺序对围岩及支护结构稳定性的影响，重点对连拱隧道整体衬砌中的薄弱环节－中墙进行了分析。

To verificate the correctness and reliability of the simulation system, a typical processing of 3 rollers stretch reducing of tube is simulated by simulation system of 3D Thermo-mechanical Couple rigid-plastic FEM.

为验证作者开发的&钢管张力减径三维热力耦合刚塑性有限元虚拟仿真集成系统&的正确性和可靠性，对典型的三辊张力减径过程进行了模拟，并将模拟结果与产品实测结果进行对比，结果证明了采用有限元模拟技术能够为钢管张力减径工艺制度制定和轧辊孔型优化提供依据。

Characteristics of Ten-Roll Tube Straightener;2. Ultimate strength of short steel tube-confided concrete;3. To verificate the correctness and reliability of the simulation system, a typical processing of 3 rollers stretch reducing of tube is simulated by simulation system of 3D Thermo-mechanical Couple rigid-plastic FEM.

为验证作者开发的&钢管张力减径三维热力耦合刚塑性有限元虚拟仿真集成系统&的正确性和可靠性，对典型的三辊张力减径过程进行了模拟，并将模拟结果与产品实测结果进行对比，结果证明了采用有限元模拟技术能够为钢管张力减径工艺制度制定和轧辊孔型优化提供依据。

Through the comparison analysis for two MD simulation data, it was found that for the system with Zn2+ ions and phenol, the conformational flexibility of insulin hexamer was decreased.

用分子动力学模拟方法设计了两个模拟时间为600 ps的对比计算机模拟实验，研究了R6态的胰岛素六聚体在水溶液中的构象柔性。

Some researchers reported that using sonde data in modifying wind's profile has greatly improved the results of trajectory simulations.

郭（2003）於轨迹模拟中加入了以系留探空气球所量测得之垂直剖面气象资料，用以改善地面测站无法有效地呈现出位於烟流高度之温度风分量，并藉此来改善轨迹模拟在中部山区模拟结果不佳之缺点。

The present study focuses on some important aspects of LES technology. It includes review of LES development, fundamental theory and equations and numerical implementation. The procedure of LES consists of filtering Navier-Stokes equation, modeling subgrid scale, closuring the set of equations and solving the numerical equations.

本文对大涡模拟的研究集中在以下几个方面：首先回顾了大涡模拟技术发展的历程，它的理论基础与滤波方程组，以及它在CFD程序中的数值模拟实现：包括滤波NS方程，模化亚网格量，封闭滤波方程，求解滤波方程。

Based on typical models, clutters are generated on computer so as to study the feasibility of simulation algorithms.

本研究的目的就在于总结现有的杂波模型和模拟方法，并根据典型模型，通过计算机模拟产生杂波信号，研究模拟方法的有效性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。