数值

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。

According to the different dynamic models, the time precise Baumgarte modify technique and the method to solve state equations were used to simulation the flexible impact system, the satisfactional results were obtained.To the control problem.

对于数值模拟问题，针对不同的动力学模型，分别利用精细Baumgarte违约修正法及状态方程的精细积分法对系统进行了数值模拟，得到了满意的数值解。

This study performed the three-dimensional nonlinear finite element analyses using a general purpose finite element program ABAQUS to simulate the structural behaviors of two full-scale H-beam to box-column subassemblage specimens in fire test. In the experimental program of this study, the two specimens were tested at elevated temperatures in the furnace and under the specified constant loadings, and the moment connections of the two specimens were made of fire-resistant steel and normal steel respectively for comparison.

本研究针对两支实尺寸H型梁-箱形柱接合之耐火钢与普通钢弯矩接头试体受定载加温的火害行为进行ABAQUS有限元素数值模拟，所得之数值结果分别与两支试体在大型高温炉中所进行的火害试验结果比对，以验证有限元素数值模型之正确性。

There are profound study on the internal heat and mass transfer of cooling tower in unwindy weather at present.

在目前冷却塔数值研究的基础上，本文以逆流湿式自然通风冷却塔为研究对象，建立冷却塔内外空气流动和传热传质的数学和物理模型，并运用数值计算方法对冷却塔进风口附近的流场进行了数值模拟。

In this paper,the power coupling efficiency of semiconductor laser passing through a collimating system is discussed.

在长距离无线光通信中，接收点光功率密度与光束发散角平方呈反比关系，为了获得小的发散角和大的功率耦合效率，要求准直系统有较大的数值孔径，但数值孔径过大会增加像差，因此合理设计功率耦合效率与准直系统的数值孔径就非常重要。

The explicit dynamic code DYNA3D was used to simulate the drawing process of cross member part.

对汽车底盘横梁拉深成形过程进行了数值模拟，对比分析了数值模拟结果与实验结果，同时讨论了凸模的虚拟冲压速度对数值模拟结果的影响。

Secondly, based on the abstract and assignment decomposition of the entities included in the URWE, the Agent model of the URWE entities such as pollutionenterprise、 governor and water body was built, and combined with the theory of drainage basin water pollution control and decision-making, the assignment allotment and frame design of the Agent included in the URWE was made in detail, the theory foundation was established to achieve the URWEIDSS based on Agent.

再次，分析了现有城市河流水质数值仿真所存在的不足，提出了基于Agent的城市河流水质数值仿真模型，并基于这种城市河流水质数值仿真模型，提出了采用模块化、拖拉式的方式进行城市河流水质仿真的方法。

The following are the results: 1. An abstract meteorological phase parallel model for numerical weather prediction is developed as follows:〓 In this equation, parallel wall clock time related with computing grid numbers, load imbalance, communication and synchronization overhead is given out. It can be used to design and analysis the parallel algorithm.

该研究工作的主要结果如下： 1 发展提出了一个适用于气象数值预报模式的阶段并行模型MPPM：〓它表明了并行计算时间与数值模式的计算格点量、负载平衡因子、通信开销、同步开销及并行开销等之间的关系，为设计和分析数值预报模式的并行算法提供了理论依据。

Based on them, distribution laws of subgrade temperature field under fluctuant boundary temperature cycle conditions are analyzed, and different ratios of slope for general subgrade and different status when there are or not banquettes are compared by laboratory simulation and numerical analysis; thermal insulation and cooling effect of thermal insulation slab, broken stone and non-power heat pipes is respectively investigated under the trend of elevated temperature by numerical analysis, laws of subgrade deformation are predicted under the trend of elevated temperature and influences of subgrade thaw settlement on pavement stress are studies by numerical computation for observation data of representative road sections selected.

为研究青藏公路冻土病害处治对策，从青藏公路2002年～2004年冻土病害整治工程实际出发，在系统分析研究青藏公路病害及发生机理的基础上，运用室内模拟试验、数值分析方法，依托处治冻土病害路段实际使用的隔热板路基、碎石路基、无动力热棒路基等进行现场试验，分析边界温度周期波动条件下的路基温度场分布规律，同时进行一般路基不同边坡坡率的对比研究及有无护坡道的对比研究；运用数值分析方法，对气温升高趋势下隔热板、碎石、无动力热棒的隔热降温效果进行了研究；选择代表性路段观测资料，运用数值计算的方法，进行升温趋势下的路基变形预测，研究路基融沉变形对路面应力的影响。

In the couping solution, based on the characteristics of the models in this dissertation, each of loading step is finished in unit time. Thus the volumetric strains on the current increment step as analysis parameters are inserted into the equation of continuity and a physical equation for pore water pressure is presented. The fundamental solutions of two kinds of classic problems (axial symmetry and plane strain) are derived. By use of the fundamental solutions of pore water pressure combined with finite element method of soil mechanics, a semi-analytical and semi-numerical method for nonlinear consolidation equations is presented.

在耦合分析中，根据本文模型的特点，将每一荷载增量步看作单位时间完成，对应当前增量步的体变分量作为分析参数代入连续方程，建立了基于数值模型的孔压变化方程，根据工程中最常见的两类问题推导出基本解，结合土骨架的控制方程建立了此类液-固耦合问题的半解析半数值解答体系，编制了有限元程序，从而实现了从建立本构关系到模拟固结问题的全数值方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。