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Simulation and experiment results indicate that the optimization model is practical and reliable,and can be ap...

仿真和实验结果表明，该优化模型实用可靠，可用于生产实践中工作辊换热系数的确定。

And it is further proved that the technique is effective and practical by means of the examples of the extraction of periodic and aperiodic signals.

运用周期和非周期弱信号的检测实例，进一步证明了该方法的有效性和实用性。

According to the change of the enemy\'s quantity and the qualitative theory of the differential equation, we research the spruce aphides and its predator system. At the same time, we discussion the spruce aphid multiplication model when the natural enemy quantity is a certain value and the periodic oscillating model whose the quantity of the natural enemy changes along with the time. Obtains the stability condition of the balance point and the limit-cycle existing condition, the system presents the dissipative structure\'s character. Finally it explains that this theoretical analysis has certain practical significance regarding the preventing and controlling harmful insect.

第五章，松毛虫与其天敌的关系是食饵和捕食者的关系，根据天敌数量的变化，利用微分方程定性理论，研究松毛虫与天敌系统，讨论天敌数量为一定时的松毛虫增殖模型和天敌数量随时间变化的周期振荡模型，得到正平衡点全局稳定性和极限环的存在条件，通过计算机模拟，说明周期振荡的捕食模型能够呈现典型的时间耗散结构特征，对于防治害虫有一定的实际意义。

More practical approach than eating aphrodisiac You want to have more sexual functions?

更实用的比吃壮阳药办法你想拥有更强的性功能吗？

Atwood, based on her great concern about the practical environmental problems, created Oryx and Crake, which has become a representative of contemporary environmental apocalypticism.

阿特伍德基于对现实环境问题的深刻关注创作的《羚羊与秧鸡》成为当代环境启示录文学的典范。

This thesis, employing the environmental apocalyptic literature approach, one of the perspectives of eco-criticism, to interpret the novel Oryx and Crake, which is written by the famous Canadian woman writer Margaret Atwood, excavates the connotation of environmental apocalypticism in it and evaluates the literary value and practical social significance of this creation.

本文采用生态批评的方法之一——环境启示录文学研究——对加拿大著名女作家玛格丽特·阿特伍德的小说《羚羊与秧鸡》进行解读，发掘其中的环境启示录意蕴，并对这种创作的文学价值和社会现实意义作出评价。

ESMI is a non-profit and apolitical society, which promotes the development and practical application of Molecular Imaging within Europe.

欧洲分子影像学会是一个非营利，非政治的社会组织，旨在促进欧洲内部分子影像发展和实际应用。

It is not only a practical apparatus, but also exquisite works of art.

它不仅是一种实用的器具，而且是精致的艺术品。

It is the practical and apparent side of freedom.

它是自由实际和明显的一面。

I think so. They appear to be very practical.

我想是的，它们看起来很实用。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。