昆虫吃菜大法

这是一部给昆虫,还有好奇的你看的宝典。昆虫是生物界中最大的家庭之一,因此食性不一非常正常,它们中不仅有吃肉的,更有一大帮素食主义者,以及杂食主义者。     

Dependence of electrical and optical properties of IGZO films on oxygen flow

Amorphous InGaZnO (a-IGZO) films were deposited on the corning eagle XG (EXG) glass substrates using magnetron sputtering method. The structure, surface morphology, electrical and optical properties of these films were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), semiconductor parameter analyzer and spectrophotometry, respectively. The influence of oxygen flow on the electrical properties of IGZO thin films was studied, showing that increasing oxygen flow changes the resistivity with six orders of magnitude. The contact resistance of ITO/IGZO is 7.35×10⁻² Ω·cm², which suggests that a good ohmic contact exists between In₂O₃: Sn (ITO) and IGZO film.     

Video retargeting using optimized crop-and-scale

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.     

整合思维巧解数学综合题

数学综合题从题设到结论,从题型到内容,条件隐蔽,变化多样,因此决定了审题思考的复杂性和解题设计的多样性,也就成为高考考查的热点.本文对常见的几类综合型试题作一介绍,希望同学们有所收获.     

任务驱动——学生思维发展的驱动力——以《建立超链接》为例

如何恰当地运用任务驱动法开拓学生思维是摆在每一位信息技术教师面前的重要课题。 1教学实例 下面就曾听到的《建立超链接》一堂课的一个片断谈我对“任务驱动”式教学的探索与认识变化过程。     

嘻哈视频集锦

八爪鱼：看到“精彩视频集锦”我就有种看“NBA今日十佳球”的感觉（暴暴蓝：我看你是对篮球着魔了）。话说前不久刚刖举行了编辑部篮球赛,八爪鱼、暴暴蓝、丢丢的强势组合,却不幸在小组赛中一分惜败,唉一郁闷!闷心!不爽!     

7．强大的APP，让iPhone无所不能

这是一款能够读取TXT、PDF、Word、音频、视频、图片等多种格式文件的软件。乃iPhone必备软件之一。Goodreader可以编辑TXT文档。但需要特别注意的是,TXT文本要在PC端将编码由ANSI改为UTF-8格式再保存。不然导入后只能识别出一大堆的乱码。     

高效课堂——问题的核心作用

建构主义理论的内容很丰富,其核心是:以学生为中心,强调学生对知识的主动探索、主动发现和对所学知识意义的主动建构(而不是像传统教学那样,只是把知识从教师头脑中传送到学生的笔记本上).建构主义强调,学习者并不是空着脑袋进入学习情境中的.在日常生活和以往各种形式的学习中,他们已     

解数学题几点策略

一、巧用换元法求函数值域所谓换元法求函数值域,就是运用三角代换或代数代换,把所给的不易求值域的函数转化为另一个易求的或比较熟悉的函数,再求出它的值域.1.三角代换     

高中化学解题策略浅探

一、守恒法的应用守恒思想贯穿着中学化学始终,守恒法的灵活运用能够简化解题的过程,从而快速准确地解答题目．守恒法类型有很多,如电荷守恒、电子守恒、元素守恒、质量守恒等。