查询词典 evolution

Theoretical and experimental investigation on the evolution of the atomic system with gaussian velocity distribution in a laser plane wave, in which the theoretical predications is in good agrement with the experimental results.

3在理论上和实验上系统地研究了高斯速度分布原子系统在激光行波场中的演化过程及其和激光光强、失谐、作用时间等物理参量的关系。理论和实验结果基本一致。

The emergence of the image of Houji who was an ancient agronomist and the first ancestor of people in Zhou Dynasty has a strong mythological color . The evolution of this image has reflected different modes of thinking and different ways of life in different ages .

后稷作为周人始祖形象的出现，不仅本身带有浓厚的神话色彩，而且在这一形象的衍变中，反映出了当时人们的思维模式和生活方式，呈现出了不同时代的文化意蕴。

Bridge is a man made channels above the air. the bridge has being developed quickly as the evolution of vehicles and our requirement.

桥是一种架空的人造通道，随着人们的需求不断提高，交通工具的不断发展。

It's the next step in the Air Force's evolution.

它是美国空军下一步发展的重点。

In this paper, the evolution of air hammer and air bit has been reviewed, the structure, advantages and application con.

为此，对空气锤和空气钻头发展历史进行了简单回顾，介绍了空气锤及空气钻头的结构、使用优点和应用注意事项，重点阐述了空气锤和空气钻头在普光气田的应用效果和出现的问题。

Compared to the "real" Impreza , recently unveiled in its latest hatchback evolution, the concept created by Lars Martensson features a very aggressive styling with a short wheelbase, muscular wheelarches, huge tires and extreme features like the air scoop on the hood and the rear spoiler.

相较于"实质"impreza ，近曰推出其最新hatchback演变概念创造的拉尔斯martensson特点的一个非常进取的造型与短轴距，肌肉wheelarches，巨大的轮胎和极端的特点，象空气舀的发动机罩和尾部扰流器。

The air motion in umbrella curtain spray combustion system for diesel engine was studied using numerical analysis with the emphasis on the evolution of in-cylinder flow field, the interactions between swirl and squish and the effects of combustion chamber configuration.

用数值分析方法研究柴油机伞帘喷雾燃烧系统中的空气运动规律，探讨了缸内流场的演变过程、涡流与挤流的相互作用和燃烧室结构的影响，并比较了该燃烧系统与原机燃烧系统中的流场。

We are just that much ahead of you, albeit thousands of years in evolution and it is also your path.

我们仅仅只是领先你们的进化，在多年的演变之后，这也是你们的道路。

Bruce Alberts, president of the National Academy of Sciences, warned this year in a "Dear Colleagues" letter of "increasingly strident attempts to limit the teaching of evolution."

美国国家科学院主席布鲁斯阿尔伯特，在今年的一封署名为"致亲爱的同事"信中，警告避免出现"越来越多的限制进化论教学的一些敏感尝试"。

In order to study the polygenesis of AFP and the relationship between individual development and system development, the evolution of the albuminoid gene family was analyzed by analyzing the proteins of the gene family from different species by bioinformatics approaches, and drew a phylogenetic tree of different albumin domains from different proteins.

为了研究AFP的系统发生，并以此探讨系统发育与个体发育的关系，运用生物信息学手段，分析了不同物种中类白蛋白家族成员的进化关系，并对各分子的白蛋白结构域进行了进化归类。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。