查询词典 simulations

Using hydrodynamical/N-body simulations and pure dark matter simulations, we found the dark haloes in the first kind of simualtions are more concentrated than in the second kind of simualtions. This result could increase the predicted probability of giant-arcs in gavitational lensing and cancel the great difference between the theoretical and observational results.

用含气体的数值模拟与纯暗物质的数值模拟比较，发现前者暗晕中的暗物质分布比后者中的更加密集，密集参数更大，这可能可以提高理论预言的引力巨弧的概率从而弥补理论与观测结果间的差距。

To verify the accuracy of CFD simulations, experiments were carried out. The results of simulations with user defined function of the effects of impeller type and stirring rate on the velocity field were in good agreement with the output of particle image velocity. The oxygen mass transfer model can be used to predict the process of oxygen mass transfer in a vessel, and the logarithmical expression can successfully describe the relation between the oxygen concentration and the dissolution time.

结果表明，(1)采用Fluent软件并结合用户自定义方程(user defined function， UDF)能够很好地模拟出实际搅拌器内流场分布，模拟结果与采用粒子成像技术(particle image velocity， PIV)的实验测量结果相符；(2)采用氧气传质模型能预测氧气在搅拌器内的动态传质过程，同时氧气浓度与溶解时间的对数关系式能较好描述试验搅拌器内氧气动态传质过程；(3)在相同搅拌速度下，圆盘涡轮式搅拌器产生的湍流动能分布范围要大于桨式搅拌器产生的湍流动能，而且湍流动能分布更均匀，湍流强度更大。

The applicability of this constitutive model is evaluated with the simulations of material tests conducted by Sasaki et al., includes (1)Uniaxially constant strain amplitude cyclic test,(2)Fast in tension/Slow in compression constant strain amplitude cyclic test,(3)Slow-fast-slow constant strain amplitude cyclic test,(4)Cyclic strain with tensile hold time test. Simulations based on this constitutive model have a good agreement with (1),(2) and (3), proofs that it can describe the cyclic stress-strain behavior of 60Sn/40Pb solder very well.

为验证本模式之能力，本文选择Sasaki等人之实验为对象，分别对60Sn/40Pb焊锡在(1)定应变振幅之循环单轴负荷实验、(2)拉伸快/压缩慢之定应变振幅循环负荷实验、(3)慢-快-慢之定应变振幅循环负荷实验、(4)拉伸应力保持之循环应变实验下的材料行为进行模拟，由(1)、(2)及(3)之结果证明本模式对60Sn/40Pb焊锡循环应力-应变整体行为具有理想的描述能力，并对循环塑性应变范围与应力范围之值有准确的预估。

The measurements and simulations are performed in real labs. Before the simulations, the size, structures and layout of labs are determined, specially, including the permittivities of materials in labs.

在实际实验室内进行仿真和测量，仿真前对实验室房间的尺寸、结构、内部布局都进行了认真的测定，特别是对每种物体在仿真频率上的介电常数进行了认真的测定。

The measured permittivities are used in relative simulations.Lots of measurements and simulations have been performed at 2.25GHz, 5.8GHz and 60GHz.

本文分别对2.25GHz，5.8GHz和60GHz的无线信道特征进行了实际测量和仿真计算，并将两者的结果从三方面功率延迟分布、接收总功率、RMS延迟扩散进行了仔细地比较，以确定仿真的可靠性。

The MgO melting simulations appears to validate the interpretation of superheating of the solid in the one-phase MD simulations.

MgO熔化模拟的结果对固体材料一阶相变分子动力学模拟的过热理论做了进一步的验证。

Numerical simulations by assemblies of circular panicles can qualitatively reflect the general characteristics of liquefaction behavior of sand. The interval effect of aspect ratio of elliptical panicle on the mechanical behavior of numerical sample is obtained, and the reason is related to the initial average co-ordination number. The regularity of evolution of fabric in the process of sand liquefaction under cyclic loading can be qualitatively achieved by using the numerical sample randomly mixed of panicles with different shapes. Numerical simulations can not only demonstrate the macro phenomenon of particle breakage, mostly importantly, it can also expose the evolution of particle breakage microscopically, and would contribute to further research of the micromechanics of particle breakage.

研究结果表明：Hertz-Mindlin非线性接触模型适用于变围压条件下砂土力学性质模拟；纯圆颗粒模拟能够定性地反映饱和砂土振动液化的一般规律；颗粒长短比变化对砂土力学性质的影响具有区间效应，其原因与粒间初始平均接触数有关；不同形状随机混合试样能够从定性规律上反映振动液化过程中砂土的细观组构演化规律；数值模拟不仅可得到颗粒破碎宏观响应，而且可以分析内部接触力变化和实现对粘结破裂位置的追踪，从而可进一步研究颗粒破碎细观力学机制。

The parameter re-estimation algorithms of MDHMM and MCHMM are also discussed, and relatively simulations of the two models are made, in theories and simulations which present the accuracy and superiority of those HMMs.

还讨论了两种新模型MDHMM和MCHMM的参数重估计算法，并进行了相应的模拟实验，从理论和实验结果论证了新模型的精确性和优越性。

The realistic simulations of the azimuth tugboats typical movement including turning ability, swaying ability were made. Among the simulations, the effects of wind and current were taken into account for the sake of reality.

最后，为验证本文所提出的模型的正确性与可行性，本文利用Visual Basic语言开发了全回转式拖轮的操纵运动仿真平台，并对全回转式拖轮的两种典型运动进行了仿真。

With the assimilation of dropsonde/QuikSCAT data, the simulated environmental flow becomes more northerly/southerly, resulting in better tracks. The data assimilation also helps to produce better water vapor mixing ratio in the simulations of the Bilis and Mei-yu cases. As a result, the radar reflectivity is better captured in the simulations.

雷达回波强度方面，碧利斯台风及6月中旬梅雨锋面个案之模拟前期同化该两种资料后，有较大的水气混合比，因为有较大的湿度及较多云水含量的缘故，使其模拟有较强的最大回波值，与观测较为接近。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。