查询词典 experimental research

Objective: Research the interface between C/C,CCH(fusional material of C/C and hydroxyapatite)implant and bone in the aim of providing experimental basis for developing a new dental implant.

目的：采用碳纤维增强碳复合材料(carbon fiber reinforced carbon，C/C)与羟基磷灰石(hydroxyapatite，HA)复合形成新型种植体，研究它们与骨结合界面的性质，为开发新型种植体提供实验依据。

Predecessor regarding this domain research relative weaker, but in view of the fact that this domain affected area is broad, myself ability and the energy are also limited, therefore this article only take plays to the shot result the vital role upper limb fast strength as a breakthrough point, S elects the acclivity barbell to lie pushes is the training method, through uses the different load combination to three experimental groups to carry on separately two month-long trainings, obtains by the time when uses the acclivity lies pushes the barbell training method training the best training load method combination.

前人对此领域的研究相对较为薄弱，但鉴于此领域涉及面较广，本人能力及精力有限，所以本文只以对铅球成绩起重要作用的上肢快速力量为切入点，选用上斜杠铃卧推为训练手段，通过对三个实验组分别采用不同的负荷组合进行为期两个月的训练，以期得出在用上斜卧推杠铃训练手段训练时最佳的训练负荷方法组合。

The research of ethylbenzene dehydrogenation kinetics has been carried out in an experimental adiabatic reactor.

在实验室绝热反应器中进行了乙苯脱氢制苯乙烯的反应动力学研究。

At present the mechanism of endangered species mostly confined to the morphology point of view, few physiological point of view of ecology, the lotus leaf fern Adiantum growth conditions of the study also stay in more qualitative analysis, there are few quantitative analysis of its optimum growth environment , The experimental use of morphological and physiological ecology of the idea and will use the components of the research methods, to be a long time to further explore their own independent development of plant taxonomy, morphology, physiology, ecology and other subjects the intrinsic link between , With a view to a new high on the survival of endangered species, adaptation and evolutionary mechanism.

目前对物种濒危机理的研究大都局限在形态学角度，很少有生理生态学角度的研究，对于荷叶铁线蕨生长条件的研究也多停留在定性分析上，很少有定量分析其最适生长环境，本实验采用形态学与生理生态学结合的思想，并将采用构件理论的研究方法，拟进一步探讨长期以来各自独立发展的植物分类学、形态学、生理学、生态学等学科之间的内在联系，以期能在一个新的高度上探讨濒危物种的生存、适应对策和进化机制。

The basic research of Polymeric aluminum chloride , prepared by electrolysis, was studied by various experimental methods and instrumental analysis techniques.

本文以电解絮凝法制备聚合氯化铝的工艺基础研究为最终目的，采用多种电解实验设备和方法，对电解制作PAC的工艺条件、技术参数进行了详细而系统地研究探讨。

The patients — one woman and two men ranging from 21 to 24 years old with a type of hereditary blindness called Leber congenital amaurosis type 2 — volunteered to test the safety of an experimental gene-transfer technique in a phase 1 clinical research study conducted by UF and the University of Pennsylvania with support from the National Eye Institute of the National Institutes of Health.

这些病人——有一名女性和两明男性，年龄在21-24岁之间，患有一种遗传性失明叫做二型利伯先天性黑矇——这三名患者志愿接受基因转移技术的实验安全性测试，这是佛罗里达大学和宾夕法尼亚大学在国立卫生研究院的国立眼病研究所资助下进行的第一期临床研究。

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。

In this thesis,based on the DFT+NEGF first-principles method,we construct a lead-molecule-lead sandwich system with single benzene-based molecule to investigate the relationship between the structure and properties of the molecular devices and the factors that influence properties of the molecular devices.Our computational investigations on these molecular devices are primarily concentrated on the effect of contact geometry between molecules and electrodes,the effect of side groups,the effect of different torsion angle between two phenyl rings and the effect of external electric field.This thesis consists of five chapters:In Chapter one,we mainly introduce the research background and development of the molecular electronics,including the experimental fabrication of molecular electronic components and theoretical simulation methods.Afterwards we discuss the questions that need to be solved in this area.Finally,the main contents of this thesis are listed.In Chapter two,we introduce the theoretical methods used in this thesis, including the main first-principles calculation methods,i.e.,the Density-Functionmethod and nonequilibrium Green\'s function.

本论文拟采用密度泛函理论和非平衡格林函数相结合的第一性原理计算方法，选取苯基小分子作为研究对象，构建了金属电极/有机小分子/金属电极三明治结构体系，系统地研究了苯基分子器件结构的改变与分子电输运性质之间的关系以及影响分子器件电输运性质的相关因素，其中重点研究了分子与电极间可能的接触结构改变、官能团、分子间的扭转角以及外电场对苯基分子电输运性质的影响，本论文主要包括以下五个章节的内容：第一章为综述部分，主要介绍了分子电子学产生的背景、分子器件的研究意义、当前研究分子器件的实验和主要理论方法，以及目前在研究分子器件中存在的一些问题，最后给出了本论文的主要研究内容和技术路线。

Anguilla has provided important experimental materials for the research on sturgeon virosis and genetic resources conservation.

欧鳗体细胞系的建立为开展鳗鲡病毒病和免疫及遗传学研究提供了重要的基础模型。

The current experimental results have already shown that the research can disambiguate very well. Further research such as score disambiguation for transforming and generalizing phase of MT can be in progress in the future. On the basis of this, a Chinese-English MT system is realized combining rulebased method with statistical-based method.

目前的实验结果表明此项研究起到很好的消歧效果，在以后的工作中可以进一步对机器翻译的转换和生成阶段进行评分消歧，并在此基础上实现一个规则方法和统计方法相结合的汉英机器翻译系统。

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。