基本单元

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 paper, based on the idea of knowledge constructionism, a structural knowledge representation approach is proposed. The "Unit" is defined as the essential knowledge component, and ten types of units and relations between units are suggested.

本文以认知科学中的知识建构理论为基础提出了一种结构化知识表示方法，此方法以"单元"作为知识表示的基本结构模块，将单元划分为十种类型，并定义了单元之间的关系。

When the cell is configured for XOR XNOR MUX scheme,it can achieve the functions such as one bit full adder and base multiplier cell and so on for datapath application.

该单元采用功能增强的MUX结构，在配置为异或同或多路选择器结构时，只用一个单元的开销就可实现一位全加器、基本乘法单元等适于数据通路应用的功能。

Using the Mindlin theory, the four-node finite element shell modal of healthy and damaged structure is formed; Using Green Function theory, the fluid around the structure is considered to be inviscid, irrotational and incompressible, and then the effect of fluid to structure is translated to the added mass matrix compared with global mass matrix using BEM.

基于Mindlin理论，本文建立了描述健康和损伤的四结点有限元板壳单元模型；基于Green函数理论，将结构所处的流体环境考虑为无粘、无旋、不可压缩的理想流体，推导了三维问题拉普拉斯方程的基本解，并利用边界元方法将流体对结构的影响归结为对结构整体质量矩阵的影响；针对各向同性损伤单元，采取刚度各向整体弱化的方法分析；对于各向异性损伤单元，采用Kachanov理论，引入了x和y两个方向的弹性损伤折减系数。

The introduction first briefly reviews Western Europe\'s universal order of "recht" in middle ages: As independent political units, the city, the manor, the church parish, the ligeance and so on were set in a rank order, the relations between each rank were established in legal form, empire represented the highest rank, and simultaneously played an arbitrator\'s role, was the arbitrator of political units subordinated to the emperor. All of these ranks were placed in natural order created by God, thus, the Christianity religious doctrine had provided the final validity for the universal legal orders; then the symbiotic of the political evolution and the legal transformation will be discussed. Western jurisprudence resided in the Church during the middle Ages, after entering into modern era, resorted to the state."State" instead of "empire" became the basic concept of modem law, and new order of "recht" was bound to make legitimate argumentation for the nation; finally, the background and sketches of this article is explained. It will trace and analyze intrinsic evolution of the idea of legal order in the background of concrete politics--especially the geopolitics, inspects how the different nation-states split up from universal Christianly world and obtain their independence, inspecting differences of respective national path, the fit or unfit quality and the success or failure in this process.

导论首先简要回顾西欧中世纪大一统的法权秩序：作为独立政治单元的各城市、庄园、教区、领地等被镶嵌在一个等级秩序中，各个等级之间以法律的形式来确立相互之间的关系，帝国代表最高等级，同时扮演仲裁人的角色，是臣属其下的各个政治单元之间的仲裁者，而帝国等级又被安置在上帝创造的自然秩序中，因而，是基督教教义为大一统的法权秩序提供了最终的合法性；接着指出西欧政治演变与法权变革的共生性：西方法学在中世纪寄身于教会之中，进入近代以后则投靠了国家，"国家"代替"帝国"，成为近代法学构造的基本概念，新的法权秩序必然围绕民族国家展开；最后说明本文的论述方式和基本思路：本文将在具体的政治——特别是地缘政治——的背景中，追踪和解析法权观念的内在演变，由此进一步****不同民族国家内、异质的法权秩序如何从过去大一统的世界中分化剥离并获得独立，并试图检讨这一过程中不同民族道路的差异、优劣和得失。

To establish the constitutive equation of material, the metric tensor for stress , strain and their transformation equations between different configurations are derived, and basic theory of finite deformation as well as elasto-plastic deformation criterion are studied. By analyzing the applicability of different element models, four-node quadrilateral degenerated Mindlin isoparametric element is adopted because of its good versatility, and the element stiffness matrix is derived. The static implicit elasto-plastic finite element equation for complex skin stretch-forming is put forward based on Updated Langrange formulation.

本文首先系统地阐述了有限变形的相关基本理论，针对板料成形建立了应力应变度量张量及其相应的转换关系；介绍了材料的屈服准则、塑性变形强化规律、塑性流动规律以及加、卸载准则，并在此基础上建立了有限变形各向异性弹塑性本构方程；对板料成形的单元模型进行了分析，针对飞机蒙皮零件特点，采用通用性强的四节点四边形退化Mindlin等参壳单元进行成形模拟，并导出其单元刚度矩阵的具体形式；基于以上研究，以逐级更新Langrange描述的持续虚功率原理为基础，建立了率形式的复杂蒙皮拉形过程静态隐式弹塑性有限元方程。

The introduction first briefly reviews Western Europe\'s universal order of "recht" in middle ages: As independent political units, the city, the manor, the church parish, the ligeance and so on were set in a rank order, the relations between each rank were established in legal form, empire represented the highest rank, and simultaneously played an arbitrator\'s role, was the arbitrator of political units subordinated to the emperor. All of these ranks were placed in natural order created by God, thus, the Christianity religious doctrine had provided the final validity for the universal legal orders; then the symbiotic of the political evolution and the legal transformation will be discussed. Western jurisprudence resided in the Church during the middle Ages, after entering into modern era, resorted to the state."State" instead of "empire" became the basic concept of modem law, and new order of "recht" was bound to make legitimate argumentation for the nation; finally, the background and sketches of this article is explained. It will trace and analyze intrinsic evolution of the idea of legal order in the background of concrete politics--especially the geopolitics, inspects how the different nation-states split up from universal Christianly world and obtain their independence, inspecting differences of respective national path, the fit or unfit quality and the success or failure in this process.

导论首先简要回顾西欧中世纪大一统的法权秩序：作为独立政治单元的各城市、庄园、教区、领地等被镶嵌在一个等级秩序中，各个等级之间以法律的形式来确立相互之间的关系，帝国代表最高等级，同时扮演仲裁人的角色，是臣属其下的各个政治单元之间的仲裁者，而帝国等级又被安置在上帝创造的自然秩序中，因而，是基督教教义为大一统的法权秩序提供了最终的合法性；接着指出西欧政治演变与法权变革的共生性：西方法学在中世纪寄身于教会之中，进入近代以后则投靠了国家，&国家&代替&帝国&，成为近代法学构造的基本概念，新的法权秩序必然围绕民族国家展开；最后说明本文的论述方式和基本思路：本文将在具体的政治——特别是地缘政治——的背景中，追踪和解析法权观念的内在演变，由此进一步****不同民族国家内、异质的法权秩序如何从过去大一统的世界中分化剥离并获得独立，并试图检讨这一过程中不同民族道路的差异、优劣和得失。

Base Station type Software versionTypes of carrier frequency board adoptedTypes of combiner adoptedWhether had obtained the network license or notIndoor type or outdoor type Whether the master port is separated from the remote-port The maximum carrier frequency capacity of single cabinet The maximum supportable sector numbers of single cabinetWhether it is dual-carrier frequency board or notMust it be paired configuration if it's dual-carrier frequency board (namely, the type of single carrier frequency station could only configure the dual-carrier frequency on hardware) The maximum achievable configuration of a single station of the single cabinetReceiver sensitivity The maximum expand capacity of a single base station (the maximum number of TRX in configuration / the number of cabinets which is required)(fill in according with the three sectors) Top box transmitted power (given separately a grade one combine and a grade two combine) The maximum output power of amplifier (voice, a single logical carrier frequency) The maximum output power of amplifier (EGPRS, a single logical carrier frequency)Whether it has tower-interfaceWhether it has built-in lightning protectionWhether it support the ultra-long cover / whether it need for software support (give simple description that how hardware and software could achieve this) The supporting condition of EGSM (it should be supported including by the carrier frequency, combiner) Dual-band carrier wave (whether it supports the mixed use of 900 M/1800M in the same cabinet) The commonality of duplicate parts Whether it can built-in transmission unitThe single cabinet size (high × width × deep) Installation method Whether it can place against the wallThe basic frame full-configured weight and the supportable number of carrier frequencyThe expansion frame full-configured weight and the supportable number of carrier frequency

基站型号软件版本号采用载频板型号采用合路器型号是否已取得入网许可室内型or室外型是否是主远端分离单机柜最大载频容量单机柜最大支持的扇区数是否是双载频板如是双载频板，是否必须成对配置(即单载频站型只能硬件配置双载频)单机柜可达到的单站最大配置接收机灵敏度单基站最大扩展能力(最大配置TRX数/需机柜数)(按3扇区填写)机顶发射功率(分别给出一级合路与两级合路)功放最大输出功率功放最大输出功率(EGPRS，单个逻辑载频)有无塔放接口有无内置避雷装置是否支持超远覆盖/是否需要软件支持(简单描述软硬件如何实现)EGSM支持情况(包括载频、合路器均应支持)双频段载波（是否支持900M/1800M在同一机柜内混合使用）备件通用性是否可以内置传输单元单机柜尺寸安装方式可否靠墙放置基本架满配重量及支持载频数扩容架满配重量及支持载频数是否支持基本架与扩容架跨扇区满配功耗满配时重量供电方式机柜进出线方式合路器损耗合路能力：几合一单扇区最大支持几载频合路到一副天线/采用几个合路器单扇区载频达到需要增加一副天线时，是否支持两级合路换以不增加天线如两级合路插损为是否支持基带跳频和合成跳频每单个合路器在从低载频数向高载频数扩容时，是否还需要增加硬件可用性指标MTBFMTTR系统中断服务时间硬件是否支持EGPRS本次报价软件版本号开始支持EGPRS的软件版本号其他特点注： 1 应分别填写出来按照本次报价要求所采用的全部BTS型号和采用的合路器型号 2 列出本报价要求的全部室外型基站与高功放单元

At the beginning, the thesis offered an analysis on the backgrounds of Unit Integral English Teaching Approach, the reasons for choosing the research topic and its theoretical and practical significance. Through literature review and summary, the origin of Unit Integral English Teaching Approach, its basic conception and present achievements home and abroad were discussed. Then the theoretical support of Unit Integral English Teaching Approach, System Theory, was introduced and its basic axioms and principles were summarized. Upon this base, the experimental framework was put forward and the exemplification of the study was described in details.

本文首先对整体教学法产生的背景、课题选题的缘由、实验的理论和实践意义进行了论述，然后通过文献回顾与综述，阐明了单元整体教学法的起源、基本的概念以及目前国内外相关研究所取得的成果，并对整体教学法的主要理论依据—系统论的基本原理和原则进行了归纳分析，在此基础上提出单元整体教学研究的实验计划，详细描述了实验的实证性研究过程。

A sentence extraction method based on BE vector clustering is proposed. In this method, BE is employed as content unit. The evaluation results on DUC2004 task 2 show that this method is better than that uses word as content unit.

提出了基于基本要素向量空间聚类的文摘句抽取方法，该方法的特点在于它是以基本要素为内容单元的，在DUC2004任务2上的评测结果显示，其效果要好于以词为内容单元。

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。