Representation:从再现到表征——论斯图尔特·霍尔的文化表征理论

英国伯明翰学派领军人物斯图尔特.霍尔把原本属于哲学认识论的再现(representation)概念转换为结构主义符号学与"文化研究"(cultural studies)相结合的"表征"(representation)概念,从而实现了再现概念的"文化转向"。霍尔在其文化研究和批评实践中,以表征概念为基石,形成了一种系统的文化表征理论。在再现论、能动反映论思维占垄断地位的中国学术界,表征理论不失为一种思维和研究范式的替代性选择,它将提供一种全新的理论视野,开启一系列全新的论题。     

Giant magnetic field from moiré induced Berry phase in homobilayer semiconductors

When quasiparticles move in condensed matters, the texture of their internal quantum structure as a function of position and momentum can give rise to Berry phases that have profound effects on the material’s properties. Seminal examples include the anomalous Hall and spin Hall effects from the momentum-space Berry phases in homogeneous crystals. Here, we explore a conjugate form of the electron Berry phase arising from the moiré pattern: the texture of atomic configurations in real space. In homobilayer transition metal dichalcogenides, we show that the real-space Berry phase from moiré patterns manifests as a periodic magnetic field with magnitudes of up to hundreds of Tesla. This quantity distinguishes moiré patterns from different origins, which can have an identical potential landscape, but opposite quantized magnetic flux per supercell. For low-energy carriers, the homobilayer moirés realize topological flux lattices for the quantum-spin Hall effect. An interlayer bias can continuously tune the spatial profile of the moiré magnetic field, whereas the flux per supercell is a topological quantity that can only have a quantized jump observable at a moderate bias. We also reveal the important role of the non-Abelian Berry phase in shaping the energy landscape in small moiré patterns. Our work points to new possibilities to access ultra-high magnetic fields that can be tailored to the nanoscale by electrical and mechanical controls.     

Unconventional Hall effect induced by Berry curvature

Berry phase and Berry curvature play a key role in the development of topology in physics and do contribute to the transport properties in solid state systems. In this paper, we report the finding of novel nonzero Hall effect in topological material ZrTe₅ flakes when the in-plane magnetic field is parallel and perpendicular to the current. Surprisingly, both symmetric and antisymmetric components with respect to magnetic field are detected in the in-plane Hall resistivity. Further theoretical analysis suggests that the magnetotransport properties originate from the anomalous velocity induced by Berry curvature in a tilted Weyl semimetal. Our work not only enriches the Hall family but also provides new insights into the Berry phase effect in topological materials.     

《狼厅》中的神话与颠覆

在《狼厅》中,希拉里·曼特尔将神话传说和历史叙事结合在一起。这种独特的叙述风格,颠覆了宫廷令人敬畏的传统形象,深刻揭示了权力斗争背后的权威确立和自我塑造。     

笔名的力量——以安妮·勃朗特的《女房客》为例

笔名作为一种副文本,在文学批评中占有重要地位,但往往并未被重视。以安妮·勃朗特的《女房客》为例,分析维多利亚时期笔名盛行现象背后的性别因素,认为安妮使用笔名的行为其实是一种处世策略,代表着女作家对自我身份的主动操控,意味着性别是不确定的,是具备操演性的,女性作家可以破除现实生活中的既定性别角色,诉诸文学创作寻求话语权威。     

游走在虚实之间——曼特尔“都铎王朝”系列的新历史主义解读

英国著名女作家希拉里·曼特尔的“都铎王朝”三部曲迄今已完成前两部：《狼厅》（2009）和《提堂》（2012）,这两部作品给她带来多个文学奖项的同时,也让希拉里·曼特尔这个名字进入了中国读者的视野.本文将结合新历史主义关于文本和历史的关系的观点：“历史的文本性”和“文本的历史性”以及“颠覆”和“遏制”,来探讨作者在小说中体现出的历史观,以期对作品有一个更加深入的了解.     

《北堂书钞》异文研究

随着年代推移,古书在流传过程中由于各种原因,会出现较多讹误。唐代虞世南所编《北堂书钞》由于善本缺失,且年代久远,校勘后发现存在大量异文。其讹误现象一为脱字,二为讹字,且校本也存在不准确之处。对异文进行研究处理,对于恢复古书原貌,正本清源有一定价值。     

基于MCS51的出租车计价器设计与仿真

在分析现有出租车计价器的基础上,介绍一种以MCS51单片机为控制核心,采用A44E集成开关型霍耳传感器进行测距,LCD1602液晶显示模块作为费用显示,采用DS1302实时时钟电路模块、AT24C02外部数据存储模块等。设计出一简易出租车计价系统。文章给出了硬件电路及主程序流程,阐述了软、硬件设计过程中关键技术的处理方法。经proteus软件仿真表明：该系统功能运行稳定,计费准确,满足出租车分时、分场景计价功能,能够达到实际应用目的。