利用脉冲展宽理论研究偏振模色散的补偿技术

随着光放大器和色度色散补偿技术的不断提高，光纤的偏振模色散（PMD）已经成为限制超高速、超长距离光纤通信系统发展的主要因素。在40 Gbit／s或更高速率的光纤通信系统中，PMD的影响已不可忽略，必须考虑PMD的补偿问题。文章从PMD引起的脉冲展宽角度，对40 Gbit／s光通信系统中常用的几种pMD补偿技术的使用做了比较分析，指出自适应的主偏振态传输补偿技术比一阶后补偿技术和主偏振态传输补偿技术具有一定的优越性。     

斯托克斯空间偏振模色散矢量叠加的研究

偏振模色散（PMD）矢量叠加方法是分析高阶PMD效应非常有力的简捷工具,利用它研究高阶PMD效应对系统性能影响及补偿方面相当方便．着重在斯托克斯（Stokes）空间来研究偏振模色散（PMD）矢量叠加的方法．     

从社会翻译学角度再看《傲慢与偏见》两译本

翻译研究在中国经历了翻译的语言学派、文化转向、语用学派等阶段发展到今天的社会翻译学。德国社会学家皮埃尔·布迪厄的社会学思想为我们研究翻译的产生、传播等过程拓宽了方向。如今,越来越多的专家学者将社会学的基本理论、研究方法运用于翻译研究中,翻译学迎来了新的发展。该文试从布迪厄社会学思想中两个核心概念——场域、习性出发,结合《傲慢与偏见》两个中文译本——王科一译本和孙致礼译本探讨不同时期各因素相互斗争形成的特定场域,译者在社会中形成的不同习性在两个译本产生、翻译策略运用中所产生的影响。     

计算机网络中冲突域和广播域的形成及解决对策研究

冲突域和广播域是计算机网络中两个非常重要而又容易混淆的概念,正确掌握和应用这两个概念对计算机网络技术的理解和掌握非常关键.主要论述了计算机网络中冲突域和广播域的概念、两者的比较、形成和解决对策.     

从语域的角度比较The Adventures of Huckleberry Finn的两个译本

近年来,语域已被愈来愈多地引入到翻译领域。从语域的角度来评价译本,可以较大限度地避免主观褒贬,用较为科学的方法评估译品的“信”度和“等值”量的大小,更易于对译作进行定量分析。笔者以此为立足点,从语域幅度的把握和语域与修辞两个方面对TheAdventuresofHuckleberryFinn的两个译本进行比较。     

语域理论视角下《小公主》两个译本的对比分析

语言学理论与翻译相结合,为翻译研究提供了崭新的视角。该文以功能语言学的语域理论为视点,从语域三要素——语场、语旨和语式出发,对美国作家伯内特的名作《小公主》的两个译本进行比较分析,探讨了语域理论在翻译中的应用,指出译文与原文应实现语域对等。     

由军事词语在体育领域中的跨域使用探析术语的泛化

文章就语料统计从共时与历时两个层面对军事词语跨域使用的现状、特点、规律及跨域原因进行了分析,从而探讨了各类行业词语跨域使用的共同规律,透过词语跨域使用的过程进一步探析术语泛化的途径.     

论"斯坦美兹补偿"与"对称分量补偿"的一致性

消除非对称运行对电网产生不良影响,对于固定负载,可以采用两种方法对电路进行补偿——即“斯坦美兹补偿”与“对称分量补偿”。文章通过实例分析了这两种补偿方法的一致性。指出非对称补偿的实质,是用补偿网络的补偿电流去消除非对称电流中的负序分量。     

创新的场域

创新的场域分别是指创新的内部结构和外部环境。创新场是由创新者、创新方法和创新果三个要素构成的。创新域主要由"自然域"和"社会域"两大部分组成,"社会域"又可以细分为经济域、政治域、文化域等。创新场和创新域的相互关系可以分为对立关系、统一关系和追随关系。存在于创新场域之间的对话、沟通、协作是塑造未来的关键。     

《花田错》中语域偏离及语篇幽默效果

古装轻喜剧《中国古代爱情故事新编》风靡银屏,本文选择该剧十五个故事之一的《花田错》作为分析对象,运用Halliday的语域理论,尝试从语域转换、语域混合和语域借用三个方面对剧中人物对白的幽默效果进行分析。     

Conducting Preference Assessments and Reinforcer Testing for Individuals With Profound Multiple Disabilities: Issues and Procedures

The purpose of this article is to review the current research on preference assessment and reinforcer testing for individuals with profound multiple disabilities (PMD). It briefly reviews the literature that describes a subpopulation of individuals with PMD distinct from the general population of individuals labeled as having profound disabilities. The article describes the types of preference assessment procedures that have been used with individuals with PMD. Results from 13 published studies, which assessed preferences and tested reinforcers with individuals with PMD, suggest that preference procedures currently used with individuals at the higher levels of profound disabilities and individuals with severe disabilities are not always successful in identifying preferred stimuli that function as consistent reinforcers for individuals with PMD. Based on this review and other studies over a 3-year period, this article provides a rationale for conducting preference assessments to assist in curriculum development and describes a process for conducting preference assessments and targeting social, affective, and motor behaviors to increase with individuals with PMD.     

偏振模色散对光孤子传输系统的影响

从考虑偏振模色散的光孤子的非线性薛定谔方程角度出发,用分步傅立叶方法对非线性耦合薛定谔方程进行求解。研究了偏振模色散效应对于光孤子传输系统的影响:首先在单个孤子脉冲的情况下,讨论了光孤子的自俘获效应对于偏振模色散的自适应能力,进而考虑更有意义的脉冲序列的情况,即因PMD引起的两个光孤子之间的相互作用以及能量损失而带来的系统损耗的问题。     

偏振模色散对光副载波复用系统的影响及其抑制

光链路的偏振模色散效应已成为高速 /长距离的传统光时分复用系统和光副载波复用系统的严重阻碍。文章基于一阶近似 ,导出了光副载波系统中 ,偏振模色散效应引起的射频信号功率衰落的一般表达式。并且研究了几种偏振模色散抑制方法的优缺点 ,提出了一种全新的相干检测技术来提高补偿性能。     

从完善征地补偿制度的角度来维护失地农民的利益

在城市化进程中,农村集体土地被征用的力度越来越大,产生了数量庞大的失地农民,加上现有征地补偿模式不合理,越来越多的被征地农民出现失地、失业、缺少生活保障的境地,很大一部分失地农民转变为城市贫民,这给我国社会的长治久安埋下了一个重在隐患。因此,在完善征地补偿过程中,有关部门应当以“三个代表”为指导思想,以民为本,制定与市场经济相适应的经济补偿标准,创新就业补偿方案,建立包括失地农民在内的社会保障补偿机制,并把三结合起来,保护好失地农民的利益。     

义工组织视角下深入理解人的城市化——以深圳市大浪小草义工为例

以深圳大浪小草义工为视角,调查分析这些外来务工人员的生活状态和心理活动,讨论义工对人的城市化进程的积极影响。并以此为切入点,深入理解人的城市化内涵。人的城市化分为四个阶段,即人的流动、就业、融入和归属,前三阶段是物质层面的量变,而最后阶段是精神层面的质变。人的城市化有两个方向,即农村人口向城市流动和城市精神向农村扩散,而后者也是人的城市化最后阶段的延续和升华。     

Mental disorder stigma among Scottish university students

Many studies have investigated university students’ attitudes to people with mental disorder (PMD) but most have used medical student participants. No Scottish studies were found on this topic where students of a broad range of subjects had participated. A mixed methods research design was employed where the topic was qualitatively explored (n = 3) prior to quantification of perspectives via questionnaire use (n = 642). Only 10.3% of questionnaire respondents agreed that PMD tended to be more violent than others and only 3.7% believed keeping PMD in psychiatric hospitals made the campus safer. Over 94% disagreed that PMD caused their problems, but 20.3% disagreed that PMD often improved with treatment. Almost 4% reported unwillingness to work on a class project with PMD. Science students were significantly more likely than arts students to view PMD as: violent, unpredictable, blameworthy for their condition, people who should be kept away from campus, causing them to feel unsafe. International students were more likely to ‘strongly agree’ than European Union (EU) students that PMD should be kept off the campus. EU students were more willing to work on a class project with PMD than international students were. Postgraduate students exhibited several more negative attitudes than undergraduates; being more likely to see PMD as violent and less likely to work on a class project with PMD. The need for mental disorder stigma related education among students at Scottish universities should be assessed.     

面向领域分析在软件构件化开发中的应用

软件构件技术是当前软件开发技术的主要动向之一.围绕面向特定领域软件构件的开发,将领域分析引入到软件构件化开发中,有助于产生具有较高的可复用性构件,并以贸易公司信息管理系统为案例,进一步深化对此方法的探讨.     

中日幼儿园科学教育之比较--以中日《幼儿园教育指导纲要》为分析视角

<幼儿园教育指导纲要>是幼儿教育的指导方针,对幼教实践具有巨大影响.本文以比较教育的视角,从中日两国新版<幼儿园教育指导纲要>对幼儿园科学教育领域的界定、幼儿园科学教育的目标、内容及方法几个方面,深入剖析两国幼儿园科学教育的异同点,探讨两国之间可能的相互借鉴之处.     

From the Bronx to Bengifunda (and other lines of flight): deterritorializing purposes and methods in science education research

In this essay I explore a number of questions about purposes and methods in science education research prompted by my reading of Wesley Pitts’ ethnographic study of interactions among four students and their teacher in a chemistry classroom in the Bronx, New York City. I commence three ‘lines of flight’ (small acts of Deleuzo-Guattarian deterritorialization) that depart from the conceptual territory regulated by science education’s dominant systems of signification and make new connections within and beyond that territory. I offer neither a comprehensive review nor a thorough critique of Wesley’s paper but, rather, suggest some alternative directions for science education research in the genre he exemplifies.