变化系数

Roughness coefficients of rills flow increases with the increase of Reynolds number and are easily affected by the slope gradient.

坡面流阻力系数f随雷诺数Re的增大而增大，其变化还受坡度的影响。

The improvement of temperature coefficient of resonant frequency in modified ceramics based CaTiO_3 system can be attributed to the distortion of octahedra inside materials.

谐振频率温度系数的变化规律取决于氧八面体的畸变程度。

The following chart shows the correlation coefficients for a lead time in oil prices from zero to fifteen quarters.

首先研究的是油价变化超前于经济增长不同时长（从0到15个季度）之下的相关系数。

An explicit analytical solution of the threshold pump power of the laser has been derived based on rate equations which contain the attenuation coefficients of the pump and laser radiations as well as the major contribution of the re-emission of the upper level atoms to the pump wave by using the analytical solutions. An analytical solution of the minimum fiber length required for the onset of the oscillation is presented. In addition, the analytical solutions describing the variations of the density of the pump radiation and upper laser level population along the fiber length have also been given.

从速率方程组出发，在不忽略光纤损耗系数和保留再发射项主导部分的近似条件下推导出了双包层光纤激光器阈值泵浦功率的显函数解析表达式，得到了光纤激光器产生振荡所需的最小光纤长度的显函数解析解；还给出了泵浦光子数密度和上能级粒子数密度沿光纤方向随光纤长度变化的显函数解析解。

Simulation precision must be maintained for duty factor varying by 1% increments.

为了使工作系数稳定，仿真的精度的增量变化必须保持在1%以内。

By analyzing the dynamic change of pressure in the vacuum tank during the pre-cooling, the effects of the mass exchange coefficient and the packed rate on the pressure in the tank were discussed.

通过分析预冷过程中槽内压力的动态变化过程，讨论了质交换系数及装载率对槽内压力的影响。

The flowand heat transfer performances of two-row bundles with different fin spacing are carriedout. The effects of fin spacing on air-side heat transfer coefficient and flow resistance arediscussed.

对不同翅片间距的两排管管束流动和传热性能进行了分析，得到翅片间距变化对空气侧表面传热系数和流动阻力的不同作用规律。

In order to explore the influence of the interactions between particles and between gas and particles on the formation of heterogeneous flow structure, a computational study was carried out by using a two-fluid model based on the particle kinetic theory.

应用双流体模型 CFD模拟的方法，从恢复系数和曳力两方面，研究了气固密相流化床中颗粒之间和气固相之间的相互作用对床内非均匀流动结构形成与变化的影响。

The experiment shows that the changes of heat transfer coefficient and heat resistance of scale are very salient using EAF.The resistance reduced by 61 percent at the end of experiment.

结果表明，在外加交变电磁场的情况下，总传热系数及污垢热阻发生了明显的变化，实验结束时污垢热阻下降了61%。

By the way,it may realize the change curve of negative temperature coefficient for the thermal resistor.

电压信号利用声卡采集到计算机中，由LabVIEW软件编写的虚拟锁相放大器测量，实现了测量负温度系数的热敏电阻阻值随温度的变化曲线。

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。