光栅长度对光纤Bragg光栅慢光的影响

运用数值计算的方法研究了光栅长度对光纤Bragg光栅慢光的影响,并重点分析了优化后的慢光特性.结果表明:随着光栅长度的增大光纤Bragg光栅的慢光时延量不断增大,增长的幅度也在增大;且一定带宽的谐振峰两边的旁瓣加强;优化参数后在光栅长度为42.5 cm处得到了群速度为c/98的慢光,且慢光谱中心频率的右侧边带产生了很大的振动.     

Creating a space to #SayHerName: Rhetorical stratification in the networked sphere

ABSTRACT

This essay examines #SayHerName as a case study to analyze how circulation of the hashtag both challenged women’s erasure from #BlackLivesMatter discourse and motivated activists to center the stories of Black women killed in police interactions. We introduce the term rhetorical stratification to discern why the #SayHerName hashtag came to matter, and how it remained relevant in the national discourse about police brutality. To do so, we analyze how the #SayHerName movement evolved from the discursive to the material through policy briefs, social media circulation, and citizen journalism, which influenced news framing and initiated greater deliberation about this issue in both the networked public sphere and in local communities. We conclude that this hashtag invitation to digital activists engaged more nuanced perspectives about police brutality and policy reform, influenced the way Black women victims of police violence are covered in the news, and motivated community-based policy proposals addressing necessary changes in local policing.     

论北魏后期儒释道三教的发展及其对文学的影响

由于孝文帝的努力，北魏后期，儒释道三教改正了前期发展中存在的问题，关系得到调和，并形成了先儒后佛、辅以老道的发展格局。受其影响，北魏后期文学创作重功用，讲求辞彩和形式，创作空间得到了拓展。     

语法构式与修辞构式的衍变关系例说?

语法构式与修辞构式共处于同一个连续统中,之间不可能有一个分明的界线,重“通”或重“工”的语用功能是分别构式性质的前提。修辞构式必有语法构式的依托,语法构式衍变为修辞构式基于构式词变、义变、式变等多种因素的相互作用,是构式意义压制的必然后果。修辞构式向新的语法构式的转化是语法类推机制作用的结果,修辞构式有限的能产性磨蚀了构式不可推导性的根基,也成为衍生新的非典型语法构式的基础。     

浅谈修辞性问句的理据

修辞性问句在交际中可起到重要的作用。它是帮助说写者表辞达意及受话人听意会意的有效手段。探索修辞性问句的特点,并运用语言学理论分析修辞性问句的理据,能更好地理解修辞性问句的交际功能。     

GaN基材料的特性及应用

GaN具有禁带宽度大、热导率高、电子饱和漂移速度大和介电常数小等特点，在高亮度发光二极管、短波长激光二极管、高性能紫外探测器和高温、高频、大功率半导体器件等领域有着广泛的应用前景。     

浅谈《半导体物理与器件》课程的教学改革

《半导体物理与器件》是半导体科学的理论基础。在教学过程中引入科研动态、CASTEP模拟计算、实验教学及微信公众号。通过CASTEP模拟计算半导体材料的能带结构、态密度和掺杂,3D结构可视直观,使学生更加深刻的理解半导体中的抽象概念。将理论付诸于实践,提高学生的动手能力,培养学生创新思维和实际解决问题的能力。     

观其会通探其精微--关于《易》学与文学关系研究的思考

本文围绕《易》学与文学关系研究的问题，对历代学者就《易》学与文学之“会通”的研究状况进行了简要回顾，探讨了在该领域的研究中如何辩证地认识与处理“会通”关系，并提出了研究过程中应该注意掌握的主要方法。     

新词新义的修辞构建

从修辞构建及其作用的角度审视新词新义,总结出新词新义的两个特点:一是体验性的修辞构建,二是修辞构建的思想主导性.并尝试从修辞构建的角度,分析新词新义的一些修辞手法,以这一独特视角探讨新词新义的修辞哲学及其评价体系.     

Democratic education and the ‘strategy of material obstacles’: a pedagogical approach to the enforcement of traffic rules in a Greek town

This paper is about people's relationship to laws, rules and regulations in a Greek town. The aim is to describe specific traffic policies, point out the underlying pedagogical assumptions and assess their potential effect in relation to the goals of a democratic education. The study springs from the author's experience as a non-native inhabitant of Greece. It is the result of daily, 15-year-long participant observation. Faced with drivers who disregard most rules of the Highway Code, especially concerning parking, the authorities in a Greek town have screwed traffic devices to the ground. Functioning like obstacles, such devices are designed to make violations materially impossible. I argue that this policy eventually teaches people not to respect traffic regulations and rules in general, thus being in conflict with the goals of a democratic education.