查询词典 be conducted to

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。

"It is common to find people of French Canadian descent to be related to large numbers of other French Canadians," said genealogist Christopher Child, who conducted the research.

有关共和党总统竞选人约翰·麦凯恩的研究结果可能没那么令人惊讶。研究发现，他是第一夫人劳拉·布什的第六代表亲。

The late empire was impelled to begin a series of alteration. Meanwhile, as the influences of western ideology, the traditional education system was getting criticism. The society needed all kinds of talents, therefore, the industrial education was conducted to improve the occasion. The intellectuals relied on the developing of industrial education to save empire, not only for the heavy industry but also the light one, thus the economics of the country could be improved.

十九世纪中叶后，中国在内外交侵的情况下，社会经济文化等各方面也开始了一连串的变动，新的观念不断冲击著传统中国，旧有的教育制度受到抨击，新的人才观念因应而起，实业教育也在一连串的改革变动中被带进中国来。

X-ray radiography, X-ray radioscopy and X-ray computed tomography were performed to the C preforms and C/SiC composites made by chemical vapor infiltration method. Elementary research of the simulation of X-ray nondestructive testing of C preforms and C/SiC composites was conducted. The main contents and conclusions are summarized as follows:(1) The equivalent absorption coefficients of graphite and SiC to Al (KAl/sic, KAI/C) were measured. It was found that in 35-45KV, KAl/sic=1.1~1.2 and KAl/c=0.08~0.12. That means X-ray radiography was much less sensitive to fiber defects than to SiC matrix. It was suggested that Al Image Quality Indicator would be used to evaluate the quality of X-ray radiographs of C/SiC.

本文选择X射线照相、X射线实时成像和X射线CT等三种方法对C纤维预制体及C／SiC复合材料进行了检测和研究，并对C／SiC复合材料X射线检测的计算机模拟做了初步的探索，主要研究内容和结果如下：(1)测定了C和SiC的X射线照相等效系数，在35～45KV的条件下，Al对SiC的等效系数K_为1.1～1.2，Al对C的等效系数K_为0.08～0.12，所以X照相射线检测C／SiC对C纤维缺陷不敏感，而对SiC基体缺陷敏感。

To meet the gap between theory and practice, the reform of nomology may be conducted in two aspects, one of which is that the teachers are supposed to use creative methods to teach and guide the students to better understand the basic theories of nomology, and the other is that the teachers should use accessorial teaching methods to facilitate the students to study actively to improve their capability of solving practical problems.

为了弥合理论与实践的裂隙，法理学教学方法改革可以从两个方面展开：一方面，教师应当创造性地使用讲授的方法，引导学生深入理解法学基本原理；另一方面，教师还应当使用多种辅助教学方法，培养学生主动学习、解决实际问题的能力。

Objective: To explore the mechanisms resulting in the recurrence of urethral scar which make urethral strictures difficult to be cured, a series experiments were conducted to find potential effective factors involved in urethral scar formation and degradation, including the studies of extracellular matrix component of urethral stricture scar, the characteristics of urethral scar fibroblast, and the effects of urine on urethral fibroblast in vitro, as well as the studies to compare the difference of collagenase activity, type Ⅰ collagen and tissue inhibitor of metalloproteinase-1 (TIMP-1) in the tissues and cultured fibroblasts from normal urethra and strictured urethra respectively, and the studies to investigate the effect of antisense TIMP-1 oligodeoxyonucleotide on cell proliferation and collagenase activity of urethral scar fibroblast.

中文题名尿道瘢痕基础研究副题名胶原酶活性，TIMP-1的表达及其反义基因治疗外文题名 Experimental study on urethral scar-activity of collagenase，expression of TIMP-1，and antisense TIMP-1 gene transfection of urethral scar fibroblast 论文作者黄翔导师杨宇如教授学科专业外科学研究领域\研究方向学位级别博士学位授予单位四川大学学位授予日期2002 论文页码总数104页关键词尿道手术瘢痕胶原酶成纤维细胞尿道瘢痕馆藏号BSLW /2003 /R699 /12 目的：研究尿道瘢痕的细胞外基质的组成，尿道瘢痕成纤维细胞的生物学特性以及尿液对其生长的影响；比较胶原酶活性，金属蛋白酶组织抑制因子-1（TIMP-1）以及Ⅰ型胶原含量在尿道瘢痕和正常尿道组织及体外培养的成纤维细胞中的差异；研究反义TIMP-1寡核苷酸对尿道瘢痕成纤维细胞增殖以及胶原酶活性的影响。

Tip: Some planet types require habitation research to be conducted before they can be colonized.

提示：一些类型的行星可能需要相应的环境学研究成果才能殖民其上。

As stipulated in The Education haws, education can not be conducted for the purpose of productiveness. However, the regulation doesn't mean that education can never be profitable, and the profits earned through education should returm to education.

那么作为教育不可缺少的体育教育呢，体育教育产业化问题也应该引起足够的重视，面临ZI世纪的中国体育教育需适应教育发展的大势，与国际体育教育现代化寻求接轨的基点。

In this context, it should be noted a Recertification Audit will have to be conducted before the relevant date of the audit cycle is exceeded.

在这方面，必须注意换证审核必须在审核周期到期之前执行。

of fentanyl in the propofol Endoscopy in the use of effective and can be expanded to gastroscopy, but there are respiratory depression decreased heart rate and blood pressure side effects, the clinic with a strict indications and contraindications , In the administration of excessive speed can not, due administration of individual differences, should be of conventional oxygen therapy, conducted by professional anaesthetists anesthesia and equipped with necessary rescue equipment.

芬太尼联合异丙酚在内镜检查中运用疗效好，可扩大胃镜检查适应范围，但有呼吸抑制及血压下降心率减慢的副作用，该诊疗术要有严格的适应症和禁忌症，术中给药速度不能过快，给药量应有个体差异，术中应常规输氧，由专业麻醉师进行麻醉并配备必备抢救设备。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。