对比系数

Firstly an engine helical intake port 3D model is built by CATIA V5R14. Then the flow numerical simulation of the port is done with Ricardo's CFD software VECTIS. In addition, the port is tested on the steady flow test rig. The calculation result agrees with the test result well.

利用CATIA V5R14对某发动机螺旋进气道进行了三维造型，然后利用Ricardo三维流体软件VECTIS进行流体计算，并对该气道进行了稳流试验，计算结果与试验对比发现，平均流量系数与里卡多涡流比吻合较好，而且CFD可以获得大量试验无法获得的信息。

After a great amount of digital simulation and comparison, an optimal solution (gain variable proportional guidance law plus direct side force control) is recommended. This scheme is the best to improve the attack precision and reduce the target miss distance and would be a worthwhile recommendation to engineering practice.

在对不同方案在不同条件下的仿真打靶结果进行对比分析的基础上，从中选择出一种脱靶量最小、制导精度最高的方案——变系数比例导引+直接侧力控制——可考虑作为实际工程应用的最佳选用方案。

To take a contrast,separately introduced several kind of filter circuits,and gave a separately analysis to ripple ratio which used in the commutated circuit and the filter circuit.

作者主要讨论了整流电路和滤波电路的基本工作原理，分别介绍了几种基本的滤波电路以用来作为对比分析，对整流电路和滤波电路的参数脉动系数分别进行了具体的分析。

Considering seep, on foundation of stress coupling theory, use water to spend dam of force of overweighted law counterpoise and its ground system again the condition getting power in running a course actually undertakes numeric imitate, provide realer enumerated data for choppy criterion thereby, right overweighted coefficient and traditional convergent criterion criterion do comparative analysis.

在考虑渗流—应力耦合理论基础上，采用水重度超载法对重力坝及其地基系统在实际运行过程中的受力状态进行数值模拟，从而为突变判据提供较实际的计算数据，并对超载系数和传统的收敛准则判据做对比分析。

The IKONOS data of Beijing Yuanmingyuan is fused with Tasseled Cap and PCA methods.The fusion results are analyzed and compared with full image and vegetation subset.The result shows that,in study area,the KT fusion method is better than PCA in full image and vegetation subset.The fusion results are differential with different KT transformation matrix,and the method of fusion should be chosen according to study area,data,and classification methods.

应用缨帽变换和主成分分析方法，对北京圆明园周围的IKONOS全色波段和多光谱波段进行融合，并分别对整景影像和植被区的融合结果进行对比研究，结果表明：在该实验区，整景影像和植被区缨帽变换融合结果都优于主成分析结果，不同的缨帽变换系数矩阵在整景影像和植被区融合质量会有差别，应根据具体地点、时相，分类方法做适当的选择。

The power factor, energy efficiency, electronic loss, lumen/w. and crest factor of 2×36 W electroinc ballasts based on these two dimming methods are recoded and Compared over a wide dimming range.

在宽的调光范围内，记录并对比了基于这两种调光方法的2×36W电子镇流器的功率因数、能量效率、电子损耗、单位功率光通量以及峰值系数。

This paper presents a new chlorine decay model adaptable to the real multi-source network, using Epanet-msx simulation module, comparing the differences in the concentration of chlorine caused by using the same or different chlorine decay rate coefficient of the treated water from different water plants, and then taking the discrepancy of the chlorine decay rate coefficient into consideration will be able to reflect residual chlorine concentration and changes in the network more realistically.

通过建立符合实际工况的多水源余氯衰减模型，运用Epanet-msx水质模块进行模拟运算，对比不同水厂余氯衰减系数同一化处理和差异化处理对管网余氯浓度造成的差别，可以看出差异化处理将能更真实地反应管网中余氯浓度的分布和变化情况。

The new model and the model of average deviation factor and average temperature were compared. The result indicates that the new model has a better precision and may be used in the calculation of pressure distribution in gas condensate well with high temperature and pressure when the depth of well is over 4000 meters.

新的压力计算模型与常用的平均温度和平均偏差系数计算方法的实例对比表明，新计算模型具有较高的精度，可用于深度超过4000 m的高温高压凝析气井井筒压力分布计算。

The new model and the model of average deviation factor and average temperature were compared. The result indicates that the new model has a better precision and may be used in the calculation of pressure distribution in gas condensate well with high temperature and pressure when the depth of well is over 4000 meters.

新的压力计算模型与常用的平均温度和平均偏差系数计算方法的实例对比表明，新计算模型具有较高的精度，可用於深度超过4000 m的高温高压凝析气井井筒压力分布计算。

FLUENT-CFD Software is used to simulate the flow and heat transfer in a rectangular passage with the arrays of circle-shaped, similar-drop-shaped, elliptic-shaped and water drop-shaped columns.

运用FLUENTCFD商用软件对装有圆形、准水滴形、椭圆形和水滴形4种扰流柱叉排阵列矩形通道内的流动和换热进行了三维数值模拟，获得了通道内流场、压力场以及局部对流换热系数分布的基本特征，并对扰流柱通道的换热特性和压力损失特性进行了对比分析。

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。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷