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Polynomial fitting was used to map out the pressure distribution curve of numerica...

与通过试验数据计算出的结果相比,数值模拟计算出来的轴向力相对误差在9%以内,而经验公式计算的轴向力相对误差为14%,采用数值模拟方法计算轴向力具有更高的精度,对多级离心泵轴向力平衡的研究具有指导意义。

It is obtained from the numerical simulation that the flow field distribution rule is in accordance with the known hydrocyclone flow field rule completely.

将数值计算与室内模拟试验的分离效率进行了对比,结果表明用数值模拟的方法进行流场研究是可靠的。

The main contributions of this dissertation are In chapter 2, we propose a scientific visualization system modal which is based on large-format display technology and Client-Commware-Server structure. In chapter 3 and chapter 4, we accomplish two large-scale scientific visualization systems. In chapter 5 and chapter 6, we propose HFFT on hexagon and parallel dodecahedron domains, and reduce the computational complexity from O and O to O and O . Lastly, we propose a parallel HFFT on distributed memory computers.

本文的主要贡献如下:提出了使用大屏幕显示技术、适用于大规模科学计算可视化系统的Client-Commware-Server模型;实现了油藏数值模拟和分子模拟两个大规模科学计算的可视化系统;给出了二维三方向六边形区域、三维四方向十二面体区域上的HFFT算法,将变换的计算复杂度分别从直接计算的O和O量级降到了快速算法的O和O量级;最后,本文给出了一种基于分布式存储的并行HFFT算法,并对影响、提高并行算法的若干因素进行了分析。

Using this method, the DSMC program is developed to simulate flows in transitional region around a sphere double cone and Apollo capsule, and the aerodynamic and thermal characteristics around the supersonic and hypersonic vehicles is investigated.

在此基础上建立了一套DSMC数值模拟程序,对球双锥和Apollo飞船在过渡区域流动进行了数值模拟,并分析了其过渡区域超音速、高超音速的气动力、气动热等问题。

This thesis takes the four-cylinder double-acting Stirling engine as the research key. Based on the Schmidt analysis method, all kinds of flow friction losses and heat losses are analyzed and a model which adapt to the performance of the four-cylinder double-acting Stirling engine is built.

本文以四缸双作用斯特林发动机为研究重点,首先阐述了模拟斯特林发动机的施密特分析法,进而分析了四缸双作用斯特林发动机工作过程中存在的各种流动阻力损失和热量损失,建立了适用于模拟四缸双作用斯特林发动机性能的模型。

The downslope height of gas/water contact with different permeability, different gas injection rate and different actuating pressure gradient with gas flooding are calculated.

实验拟合了气驱水启动压力梯度,计算了不同渗透率、不同注气量、不同气驱水启动压力梯度下的气水界面下移高度,应用CMG数值模拟软件,进行了注气抑制底水锥进的模拟研究。

Based on the theory of heat transfer, hydrodynamics and the theory of metal solidification, by using numerical analysis technology, database technology and visual technology, this paper provided a simulation and check method for the process design to simulate the fluent field and temperature field of the filling solidification and cooling, and can predict the casting quality according to these fields, thus, by this way, improved the quality of casting draft design.

该课题就是为工艺设计提供模拟和校核手段,以传热理论、流体力学及金属凝固理论等为基础,利用数值分析技术、数据库技术和可视化技术等对铸造过程进行仿真,从而模拟出在铸件充型、凝固和冷却中的流场和温度场,并根据这些物理场对铸件质量进行预报,从而提高铸件工艺设计的质量。

Analyse every group of data with, output graph of function and statistics to draw a direct and persuadable conclusion.

首先由理论到实践:即根据排队理论在M/M/1型的环境下,编制实际模型的模拟程序,通过运行程序得到实际的模拟数据。

ZXM1600P is a modular analog telephony interface product, which connects up to 16 analog telephones in a PC and supports a combination of up to 8 dual fxs or fxo channel module for a total of 16 lines.

ZXM1600P是一个模块化的模拟语音接口产品,它连接多达16个模拟电话在PC和支持相结合的多达8个双接口或接口通道模块,共16行。

It looks upon water resistant as load, simulate every instance of locomotive running and check its every parameter automatically, then collect and dispose these data of parameters, calculate the power of simulating running of locomotive, which is based on the current, and voltage of host dynamotor.

即以水阻作为负载,模拟机车运行,对机车的主发电动机的电流、电压和柴油机的转速等参数进行检测,并对检测结果进行处理,计算出模拟机车运行时的功率,并以此为依据,对机车的工作状念进行判断,通过水阻试验,调整有关参数,使机车运行时能发挥所要求的功率和满足规定的工作特性。

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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

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