原型效应对具备特定范畴特征的同义词群归类的应用性研究

本文将英语语言中的同义词现象为研究对象,从词的义位、词义的范畴展开讨论,立足于原型理论,探索性地将现代英语词汇中极其活跃的、使用异常广泛、数量上越来越多的同义词的成因,在哲学范畴、心理学范畴给出了一定的分析.     

英语中两种名词属格的认知对比

英语中,名词属格有两种形式即’s属格结构和＂名词＋of＋名词＂结构。由于这两种结构表达的都是所属关系,在译成汉语时都译成＂的＂,所以引起很多学者的关注。但是以往的研究和努力都是在划分两种属格的语义关系,通过区分语义关系的不同来找出两者用法上的差异。利用认知语言学的原型范畴理论探讨两种名词属格的属性及其互补性可以帮助英语学习者更清晰明了地掌握两种结构的使用规则,在应用中做出正确的选择和判断。     

Analysis of the Variations of Body Build of Middle-and Old-aged and Research on the Prototype

The characteristics of body build of middle - and old -aged women and its rule of variations as well as the basic sizes of various parts are discussed. All these are based on the body measurements of this age group, and also on the statistical studies of the measurement data. By setting the regression equation, the calculating formulae of various control parts are obtained, thus establishing the prototype of this age group for women.     

原型范畴理论的演变与发展及其启示

原型范畴理论是认知语言学中最重要的范畴理论之一,它兼容了经典范畴和家族相似范畴观的优点,并且它所体现的原型效应为基本层次范畴和多义范畴研究提供理据.文章在介绍原型范畴理论形成和发展的基础上,对比原型范畴理论和经典范畴理论的异同,深入分析了原型范畴的特征,进而结合实际教学,论述了原型范畴理论在词汇教学中的指导意义.     

Scaling considerations for modelling the in situ vitrification process

Thermal-electric field interactions occur in many areas of engineering. An example is the in situ vitrification process, a relatively new technology for remediating hazardous wastes. Mathematical and physical modelling of this process requires knowledge of the similarity constraints involving thermal- electric fields. This paper addresses this issue and derives the scaling relationships for modelling the remediation process from fundamental principles. Requirements for maintaining temperature and electric potential field similarity between the model and the prototype are determined as well as requirements for maintaining similarity in off-gas generation rates. A scaling rationale for designing reduced scale experiments is presented, and the results are assessed numerically.     

Surface triangulation for polygonal models based on CAD data

This paper presents an approach to the generation of unstructured surface meshes for Computer‐Aided Design (CAD) surface models represented as lists of polygons with minimum user interventions. Stereolithography (STL) data are adopted as an interface between a CAD system and the surface grid generator. STL files often include problems such as overlapping surfaces, gaps, and intersections. They have to be revised quickly and automatically before the surface models are used for the background grid of the surface grid generation. In this paper, we describe an automatic revision method for use with STL‐defined surface models. The advancing front method using geometric features is adopted directly on the modified STL surfaces. The capability of the method is demonstrated for several 3D surface models. Copyright © 2002 John Wiley & Sons, Ltd.     

管子管板检测机器人爬行脚的吊装负载能力研究

在爬行机器人携带无损检测（NDT）设备的情况下,为了保证其对立式换热器管子管板角焊缝检测过程的稳定性和可靠性,重点对立式换热器管子管板检测机器人的关键机构——爬行脚的负载能力进行了数值模拟分析和实验研究,应用Hypermesh和ANSYS Workbench联合仿真平台对爬行脚在充气和自锁工况下的结构强度和接触状态进行了仿真。模拟结果表明,在负载逐渐增加的过程中,两种工况下爬行脚与换热管内壁之间没有发生滑移失效,一直保持了良好的稳定性和可靠性。同时对爬行脚实验样机进行了开发和验证,并通过两种工况下的吊装负载实验,得到充气工况最大负载为38 kg,自锁工况最大负载为15 kg,验证了其良好的稳定性。     

神光系列装置激光聚变实验与诊断技术研究进展

文章主要介绍了国内自2000年以来的激光惯性约束聚变（ICF）实验研究以及诊断技术研究的进展,主要内容为神光II激光装置上的实验,也对刚建成不久的神光III原型装置上的实验作简要介绍,此外,文章还介绍了神光II和神光III原型装置上近期发展的诊断技术和设备.文章作者在神光II激光装置上开展了多项的物理实验研究,其中包括黑腔物理、内爆物理、流体动力学不稳定性、辐射不透明度以及辐射驱动冲击波等,并取得了重要的进展.在X射线单能成像、Thomson探针、无高级衍射的单级衍射光栅等新型关键诊断技术与尖端设备研制方面也取得了显著进展.     

复杂机电系统全寿命设计研究

复杂机电系统全寿命设计能够满足生产线的高可靠性要求,减少因装备结构复杂而引发的事故,变装备事后安全性评估为事先的主动可靠性设计,因此该研究具有重大意义．本文以齿轮全寿命试验为例,指出了全寿命设计可持续发展必须依赖于小子样系统研究,提出了小子样系统的两种研究策略：数值模拟研究和虚拟样机研究。     

硅衬底上聚丙烯酰胺/氧化锌纳米线薄膜蓝色发光二极管

采用高分子络合软模板法利用高分子络合和低温氧化烧结反应,在硅衬底上自组装生长出顶面平滑具有六角柱形结构的ZnO纳米线,并基于此聚丙烯酰胺/ZnO纳米线体系构筑了聚合物基ZnO纳米线发光二极管器件,在相对低的阈值电压下实现了常温常压下电场驱动的蓝色发射光,并且其发光颜色可由其应用的激励电压方便地调控.几乎垂直排列的ZnO纳米线/高分子薄膜在器件中被作为发射层.该方法使用聚合物作为LED器件的粘结剂和发光层的分散介质,稳定了硅衬底上埋置在聚合物薄膜中的ZnO纳米线准阵列并对ZnO纳米晶的表面起钝化作用,防止发光猝灭.结果表明,新技术是一种低成本制备ZnO基紫外/蓝色发光材料的工艺,并且减少了以往工艺中要求ZnO薄膜p型掺杂的麻烦.