查询词典 experimental

The experimental data obtained were submitted to analysis of variance and chisquare test.

实验获得的数据提交给方差分析和chisquare 测试。

At last, experimental results and analysis are given in this paper.

论文最后给出了实验结果和相应的分析。

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。

The classical geometry went though three development period, that is experimental, speculative and analytic geometry.

古典几何学大致经历了实验几何、推理几何和解析几何三个发展阶段。

The analytical and experimental results show that this analytic method is logical and effective.

理论分析与实验表明，该方法是合理的和有效的。

Experimental results show that the proposed analytical calculation method is feasible.

实验结果表明所提出的解析计算方法可行。

The results show that the analytical results agree well with the experimental results.

结果表明模拟分析与实验结果吻合得较好。

The experimental results were analyzed and discussed.

对实验结果进行分析讨论。

The calculation results anastomose experimental data and prove the reliability of the model again.

用建立的喷雾反应过程数学模型计算所得结果也与实验数据相吻合，验证了该数学模型的普遍性。

Objective: To study the long-term protection of external stent to vein graft, and its possible mechanism in hypercholesterolemia; also to provide the experimental evidence to use the external stent in CABG surgery. Methods: Establish a hypercholesterolemic rabbit model and anastomose vein into artery, total cholesterol was determined timely.

目的：研究外支架在高胆固醇血症内环境下对移植静脉的远期保护作用及其可能的机制，为临床上对具有高胆固醇血症的冠脉架桥病人使用桥静脉外支架改善远期通畅率提供实验依据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。