利用美术教具 实施悬念教学

美术教具悬念教学按不同的载体可分为：信封教具悬念教学、布袋教具悬念教学和黑匣子教具悬念教学。美术教具悬念教学是以美术教具视觉形象的“新”、“奇”、“趣”等特点吸引学生,激发学生学习兴趣,引发学生注视、思考、探究,从而培养学生发散性思维和创造性思维。     

黑洞物理研究进展

在现代物理学中,黑洞是最错综复杂的物体之一。它们为类星体和其他活动星系核提供能量,也有助于透彻地理解量子引力。我们回顾一下黑洞的观测上的证据并简单地讨论它们的一些特性,也阐述了一些近年来涉及宇宙监督和黑洞熵统计起源的进展情况。     

压迫下的觉醒--从《紫色》看女性文学中的妇女主义

在女性文学史上,黑人作家爱丽斯·沃克创作的长篇小说《紫色》具有重要地位。沃克在作品中深 刻揭露了黑人男性对黑人女性的歧视和迫害,并且着力表现和挖掘了其现实和历史根源,诠释了她对"妇女主义" 的定义。本文通过解读小说中的部分人物形象和情节来浅析沃克妇女主义的特点。     

爱伦坡的文学理论及其在《黑猫》中的体现

爱伦坡在理论和实践上均坚持文学的最终目的是追求美的整体效果．反时文学的说教功能和现实价值。他的恐怖小说以独特的想象和深刻的洞察深入到人类心理隐秘的角落，名作《黑猫》是坡创作原则的集中体现。     

初始啁啾对光纤中双黑孤子传输特性的影响

本文采用变分法研究了初始啁啾对光纤中双黑孤子脉冲传输特性的影响。结果表明：初始负啁啾将减弱邻近黑孤子间的排斥相互作用     

Black Boxes in Workplace Mathematics

We ground Cultural-Historical Activity Theory (CHAT) in studies of workplace practices from a mathematical point of view. We draw on multiple case study visits by college students and teacher-researchers to workplaces. By asking questions that ‘open boxes’, we ‘outsiders and boundary-crossers’ sought to expose contradictions between College and work, induce breakdowns and identify salient mathematics. Typically, we find that mathematical processes have been historically crystallised in ‘black boxes’ shaped by workplace cultures: its instruments, rules and divisions of labour tending to disguise or hide mathematics. These black boxes are of two kinds, signalling two key processes by which mathematics is put to work. The first involves automation, when the work of mathematics is crystallised in instruments, tools and routines: this process tends to distribute and hide mathematical work, but also evolves a distinct workplace ‘genre’ of mathematical practice. The second process involves sub-units of the community being protected from mathematics by a division of labour supported by communal rules, norms and expectations. These are often regulated by boundary objects that are the object of activity on one side of the boundary but serve as instruments of activity on the other side. We explain contradictions between workplace and College practices in analyses of the contrasting functions of the activity systems that structure them and that consequently provide for different genres and distributions of mathematics, and finally draw inferences for better alignment of College programmes with the needs of students.     

电解催化氧化法处理造纸黑液

本文提出了一种治理造纸黑液的新方法─—电解催化氧化法、并讨论了影响ＣＯＤ去除率的各种因素。在最佳反应条件下，采用电解催化氧化法，ＣＯＤ的去除率可达９０．３％，出水接近国家排放标准。     

论《紫色》的话题艺术

文章试用言语行为理论分析<紫色>的话题艺术.书中女主人公茜莉自述的话题可分为自我遭遇、女权斗争、女性意识、种族歧视、宗教信仰、自力自强6个大的方面.纵向考察这些话题,可以明显地感受到茜莉的思想观念从封闭到开放,女性意识从麻木到觉醒,社会地位从依附到独立,崇拜对象从神到人的变化过程;横向考察这些话题,一个个个性各异的人物跃然纸上.纵向体现的是变化,横向表达的是特色; 前者在后者的作用下发生,后者在前者的衬托下更加鲜明,二者的有机结合,造就了<紫色>别具特色的语言艺术.     

‘I know what you are about to enter’: lived experiences as the curricular foundation for teaching citizenship

ABSTRACT

This qualitative multiple case study documents how two African American women social studies teachers utilise their lived experiences as the curricular foundation for teaching differing notions of citizenship to African-American students. Particular events, experiences, and relationships helped shape their perception of their roles as teachers and how they approached crafting a curriculum that was representative of their lived experiences as well as those of their students and community. This study hopes to shed light on how experiences may be used as valuable sources of knowledge in creating a more inclusive curriculum that mirrors the diversity seen in classrooms.     

运动镜模型 黑洞:时空结构

弯曲空间量子场中的一种运动镜模型可用于等效描述黑洞视界外的物理并使其物理过程及相应解释得以简化。本文在给出一特定的运动镜轨迹后将黑洞视界外的史瓦西空时流形与运动镜的空时流形进行了比较,得出两种结构在视界外空时区域完全相同。