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In this paper, the study about the interactionbetween the solar wind disturbance and the current sheet is mainly carried out intwo aspects: First, the characteristic propagating of this kind of CMEs erupting inthe open magnetic field between two helmet streamers has been studied by theMHD numerical simulation. Second, the Hall effect during magneticreconnection has been studied respectively through numerical simulating andtheoretically analyzing. And some of its characteristics have been discussed inthe aspect of the interaction between the disturbance and the sheet current.

论文主要从两个方面研究了太阳风扰动和电流片的相互作用：其一，对爆发在两冕流结构间的CME的传播特点进行了MHD数值模拟研究；其二，对磁重联过程中的Hall效应进行了数值模拟研究和理论分析，从扰动和电流片相互作用的角度初步探讨了Hall效应的一些特征。

After analyzing and studying the over all structure of ordinary C6163 lathe, we use numerical control technology to re-equip ordinary C6163 lathe for automation and precision. We attach the numerical control device and execution elements to the lathe and choose an appropriate machinery servo-system and computer system.

摘 要：本次毕业设计的题目是 C6163型车床的经济型数控改造设计，应用数控技术对C6163普通车床进行自动化和精密化改造，改造技术主要为：在车床上附加数控装置和执行元件，选择合适的机床伺服系统和计算机系统等。

Based on the linear wave-making numerical method, the investigation on nonlinear wave-making numerical method by using a Rankine source method is presented in this paper.

本文在线性兴波数值方法的基础上，利用Rankine源法开展了非线性兴波数值方法的研究。

Then the numerical simulation model of the oil pollutant migration in this kind of water-bearing system is constructed by means of the numerical simulation technology.

在分析水文地质条件的基础上，利用实验研究获得含水系统中连接上下含水层的弱透水层的渗透规律，然后运用数值模拟技术建立起此类含水系统中石油类污染质运移数值模拟模型。

Secondly, conception of vortex board was introduced, the numerical simulation was implemented on vortex tube, numerical simulation method was verified of valid by compared with experiment results.

其次，引入涡流板概念，对涡流管进行数值模拟，对比数值模拟和试验结果，验证了数值模拟方法的可靠性。

The numerical results were in good agreement with the measured results. The experimental and numerical results show that the vortex ring was induced by baroclinic effect and Helmholtz instability in the vicinity of the thruster exit after the donation wave exhausted the tube. The intensity, shape and location of the suspended shock varied when the shape of the vortex ring changed.

爆轰波溢出爆轰管后，斜压效应和Helmholtz不稳定导致涡环的产生，同时在流场中形成止于涡环的悬吊激波，涡环形状的变化又引起悬吊激波的强度、形状和位置的变化。

The advantage of CFD numerical simulation especially displays in the development of the new products, it not only can replace theroutine experiment and offer various kinds of flow characteristic parameters by a large margin , It not only can replace conventional experimental substantially provide various flow parameters, and reveals through three-dimensional flow field pattern to optimize design based on detailed. CFD numerical simulation in this text applications will greatly enhance the cage control valve design and the technical level and product quality, reducing cage control valve design and processing cycle, significant cost savings, And optimizes through the flow channel, to reduce fluid flow through the valve of energy loss, improving efficiency in the use of energy have the extremely vital significance.

CFD数值模拟的优势尤其表现在新产品的研制开发中，它不但能大幅度取代常规实验提供各种流动特性参数，而且能通过揭示流场三维分布形态为优化设计提供详细依据；文中所采用CFD方法必将大大提高套筒型调节阀设计的技术含量与产品质量，可缩短调节阀的设计和加工周期，节省大量成本，并且通过流道优化，对降低流体流过调节阀的能量损失，提高能源利用率等具有十分重要的意义。

Meanwhile , numerical computation of aerodynamics is widely applied with the progress of computer , large quantities of relative paper has been presented . but at present , the relative literature about turbulence characteristics of plural vehicles running in row and passing maneuvers is very limited . pointing to the above difficulty , in this paper , numerical computation of turbulent - velocity field is studied while a sedan exceeding a tractor - trailer truck

本论文在对某国产轿车单车外流场的模拟地面边界层、车轮转动和侧向风载荷研究基础上，以及两辆轿车并列行驶、同向超车的稳态研究的基础上，选取了两种笛卡尔网格方案和四面体混合网格方案，开展某国产轿车超过某大型运输车的数值模拟研究。

Study on numerical simulation for top beam of MPF press According to the result of numerical simulation for top beam, the unreasonable parts are improved for its configuration.

多点成形压力机上横梁的数值分析根据压力机上横梁的数值模拟结果，对不合理的部位进行了整体结构改进。

The motor's overload ability is exerted and the stable temperature rising of the motor is realized, which fulfills the demand of numerical control electrical screw press.To fulfill exact control on strike energy and block position, a high performance numerical control software system is essentially needed.

为此，作者将模块化的程序设计方法引入到数控电动螺旋压力机的软件系统中，各个功能模块相互独立，实现了软件系统的开放性和体系结构可复用性的目的。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。