数值的

The CFD software STAR-CD is used to simulate the normal operating conditions of cold and hot plenums in China Experimental Fast Reator. Complex 3-dimension model is established by using porous medium method. The temperature and velocity distributions of cold and hot plenums are given. These results are compared with the data of the thermal designs of CEFR which have been completed. Meanwhile, the influence of the buoyancy forces is analyzed.

应用计算软件STAR CD对中国实验快堆正常运行工况中的额定工况进行了三维数值分析，使用多孔介质模型对屏蔽柱的影响进行了模拟，给出了冷热钠池的三维温度场和流场，与已有热工设计进行了比较，并着重分析了浮升力在数值模拟计算中的影响，为事故工况下的设备动态分析及相应的设备力学分析提供了数据。

It was proved through experiment that optimum passive numerical shimming can achieve a high level in superconducting NMR imaging magnets and it can be realized very easily and very economically. Field regression is not absolutely necessary in the technique of optimum passive numerical shimming, but it is useful to know the structure of the field error Bz'.

磁场回归在超导核磁共振成像主磁体的无源数值匀场技术中虽然并不是绝对必需的，但在对主磁体进行无源数值匀场时，如能知道成像空间内不均匀磁场的磁场偏差B〓的结构，也是非常有用的。

Till now, there has not three-dimensional computation of radiation in system with complex geometry and fulled of inhomegeneous, absorpting and emitting medium existed in our country also. The author carries on three-dimensional computation of radiation in vectored nozzle for the first time, which undoubtedly establishes certain basis in this field.

此前我们国内还没有对复杂形状的系统内，不均匀吸收-发射性气体介质的辐射场的三维数值计算，本文率先对矢量喷管的辐射场进行了三维数值计算，为该领域的研究奠定了一定的基础。

Through the establishment of the eight-node hexahedral elements describing continuous variation of the thickness of adjacent elements, the involved nonlinear anisotropic elasto-plastic material model, the control strategies of the dynamic load of trajectories and so on, the FEM model of SPIF was reasonable planed.

通过建立能够描述邻接单元厚度连续变化的八节点六面体实体单元、涉及材料各向异性的非线性弹塑性材料模型、和工具头运动轨迹动态加载的控制策略等数值模拟中的关键性问题，对适用于金属板材单点渐进成形数值模拟分析的有限元模型的建立进行合理规划。

According to the researching actualities in ring rolling, this paper researched deeply the basic law of rolling deformation by simulation using ABAQUS software on the base of ring rolling theory and elastic-plastic kinematics explicit FEM. And the residual stress in cold ring rolling was computed by numerical simulation.The mass scaling measures in finite element simulation of ring rolling were researched.

本文针对环件轧制的研究现状，基于环件轧制理论和弹塑性动力显式有限元法，以ABAQUS有限元分析软件为平台，以数值模拟的方式对环件轧制变形的一些基本规律进行更深入的研究，并对环件冷轧时的残余应力进行数值模拟计算。

When the business card printing and membership card making paper road during periods of low, this number can be reduced when the tension is easier to control; when the business card printing and membership card making way more paper should be appropriate to increase the value of the motor speed ratio in order to meet the innermost paper on tensility, but other paper tape tension you can adjust the feed roller and business card printing and membership card numerical Studio tension.

当所制卡和会员卡制作的纸路较少时，此数值可以适当减少，因为这时的张力比较容易控制；当所制卡和会员卡制作的纸路较多时，应适当增加RTF电动机速比值，以满足最里面纸张对张力的要求，而其他纸带的张力则可以通过调整送纸辊和制卡和会员卡制作部张力的数值进行调整。

In the third chapter, using the methods of nonlinear feedback functions and Lyapunov functions and combining analytical with numerical methods, the nonlinear feedback methods are introduced and the synchronizations of chaos in Hadley system of aerographs and LFRBM system of physics are realized. Some of nonlinear feedback functions are constructed.

第三章在介绍非线性反馈方法原理的基础上，应用非线性控制的基本思想及Lyapunov函数方法，将解析法与数值法相结合，分别对气象学中著名的Hadley环流和物理学中的LFRBM系统进行研究，找到了一类非线性反馈函数，实现了混沌自同步，并利用Mathematica软件进行仿真实验，数值结果说明了该方法的有效性。

Based on the results from the Kaiser effect test, disengagement density dislocation test calcspar mineral crystal lattice, and physical simulation results, the numerical simulation models are constructed, and the boundary conditions for simulation analysis is decided.

利用Kaiser效应、方解石矿物晶体的晶格自由密度位错的测试结果，结合物理模拟的结果，建立了研究区数值模拟分析的地质模型，确定了数值分析的边界条件。

The results achieved by the unsteady simulation on the basis of Reynolds averaged Navier-Stokes are fitted to the experiential wind profile well. The results indicate that the numerical simulation based on CFD provides a new solution to study the downburst wind characteristics under the current conditions without detailed full scale data.

数值结果表明，基于雷诺平均的Navier-Stokes方程进行的非定常数值模拟结果同根据实测数据提出的三种经验风剖面吻合良好，在目前实测资料稀少的情况下，有助于更好地研究下击暴流风的基本特征。

The article simulates the flowing situation of fluid near the current regulator by using Fluent software, rationally analyses the flow field distribution near flow nipple, and compares the value of simulation result and programming calculation result.

利用Fluent软件对节流器附近流体的流动情况进行了二维数值模拟，对所得到的节流嘴附近的流场分布情况进行了合理的分析，并把数值模拟结果与编程计算的结果相比较。

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。