反

However, it is difficult to strip Fe from the loaded extractant, this will cause trouble to the U stripping with 50 g/L ammonium carbonate or sodium carbonate.

另外，由于负载的铁不能完全反萃，会给后续的碳酸铵反萃U带来麻烦。

The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.

文中对汽车碰撞安全性的设计理论和方法进行了归类和总结，其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等；重点介绍了碰撞有限元法的基本理论和有关算法，涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等，探讨了有限元计算中的材料模型参数获取技术，开发了相应的材料试验装置及材料模型参数反求软件，在此基础上进行了基本的碰撞仿真算例和试验对比研究；文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性，指出了设计薄壁吸能构件时需要考虑的几个主要影响因素，即焊点、壁厚、横截面和预变形等；在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究，提出了吸能转向机构和自适应安全气囊的仿真研究方法；文中最后探讨了整车碰撞性能的设计与改进方法，提出了以理想碰撞特性为目标，采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法，并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究，所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车，研究结果表明，本文所提出的设计与改进方法是适用而有效的，具有重要的工程实用意义和价值。

Based on the spherical and plane triangular relationships of the spacecraft, the center of the earth, the projected-cloud and the true-cloud, several error analyses were done for the computing of parallax with different intersection angle of crafts, and incorrect images match.

利用卫星、真云、投影云和球心的平面球面几何关系，在几何反演方法的基础上，对卫星间隔和图像错误匹配带来的反演误差进行了分析。

Based on the spherical and plane triangular relationships of the spacecraft, the center of the earth, the projected-cloud and the true-cloud, several error analyses were done when one pixel was incorrectly matched with different intersection angle of crafts and the same cloud height.

利用卫星、真云、投影云和球心的平面球面几何关系，在几何反演方法的基础上，分析了在固定云高、不同卫星间隔和固定卫星间隔、不同云高这两种情况下，错误对比1个像素导致的可能的反演误差。

More and more domestic product will enter to the EU market, it will have larger impact on the related industry of the EU.Although the revision law of the market economy position anti China had effected in 1998 , our country was regarded as a transformation economy nation by the EU. The problem of Non-market economics in anti- dumping become a hard nut to crack to our government and the export enterprises.

虽然1998年《欧盟对华反倾销市场经济地位问题的修正案》生效后，我国被欧盟视为转型经济国家，但是反倾销中的非市场经济问题一直是困扰我国政府和中国出口企业的一个重大难题。

Roeder's ex-wife says he became involved with anti-tax and anti-abortion activists groups about 10 years ago.

罗德的前妻表示她在10年前被卷入反纳税和反堕胎的活动组织中。

This word "anti" has no different meaning then if you were using it with "anti-war" or anti-abortion.

这个字，"反"并没有不同的含义，然后，如果你使用它与"反战"或反堕胎。

Even more disturbing is the rise of anti-Chinese sentiment in America, and the growth of anti-American feelings in china.

更糟的是美国的反中情绪，和中国的反美情结的滋长。

But Avatar is also a distinctly political work of art, with a strong anti-American and anti-Western message.

但是，《阿凡达》是一个特别政治化了的艺术品，代有着强烈的反美，反西方的信息。

But they have also boosted anti-Americanism among Pakistanis, especially within the army.

但是这些攻击同样也加剧了巴基斯坦人民的反美情绪，尤其是军队内的反美情绪。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。