车牌图像二次定位方法研究

提出了1种的车牌图像二次定位方法,在第1次定位中初步找出包含车牌边框的车牌图像区域。再根据车牌边框对车牌图像进行倾斜校正．在此基础上,对车牌图像进行第2次定位,最终获得精确的车牌区域．测试结果表明,车牌图像二次定位方法成功率较高,能够为后续的车牌字符识别打下良好的基础．     

酷手机

手机上没有了显示器，取而代之的是一个“空洞”，以及“空洞”边框上的全息投影仪。全息手机能真实再现三维图像。     

圆角化弧

圆角是指圆心角、圆周角、圆内角、圆外角、弦切角的统称。有关圆角的证明、计算问题,都可以化归为圆弧的证明和计算,从而使得这一类问题的解答有固定的方法可循. 本文先给出圆内角和圆外角的定义及     

以“退”为“进”

有一个横2000格,竖1000格的矩形方格纸。现从它的左上角开始向右沿着边框逐格涂色到右边框,再从上到下逐格涂色到底边框,再沿底边框从右到左逐格涂色到左边框,再从下到上逐格涂色到前面涂色过的方格,如此一直螺旋式地涂下去……直到将所有方格都涂满。那么,最后被涂的那格是从上到下的第__行,从左到右的第__列。(2003,小学数学奥林匹克决赛第4题)     

带凸缘圆筒件成形数值模拟

拉深成形中凸、凹模圆角半径一直都是成形的关键,严重影响成形的质量。以板料成形理论和abaqus软件为基础,探讨带凸缘圆筒件拉深成形过程中凸、凹模圆角半径的影响。结果表明：拉深成形过程中,板料最大应力主要集中在凸、凹模圆角半径处;在一定范围内拉深时采用较大的圆角半径,整形以后侧壁的厚度也较大;但凸、凹模圆角半径处的壁厚变化则刚好相反,随着首次拉深圆角半径的增大,壁厚逐渐变薄,甚至出现破裂和折叠;运用有限元数值模拟能很好地预测其成形缺陷,并可对计算参数进行优化。     

三个不等半径圆角曲面熔接及处理

以某零件一角为例,利用MasterCAM的CAD功能,介绍了熔接及处理三个不等半径圆角曲面的两种方法,方法一采用直观传统的三圆角曲面熔接的命令进行处理;方法二采用两曲面熔接命令.重点阐述了圆角熔接的比较,用理论证明了采用两曲面熔接命令处理三个不等半径圆角曲面的方法优于直接采用三圆角曲面熔接的命令.     

单缸柴油机曲轴圆角滚压工艺浅析

曲轴是柴油机最重要的零件之一,其承受着交变的弯曲、扭转应力,服役条件恶劣,它的强度对柴油机的使用可靠性和寿命都具有直接地影响,因而提高曲轴强度是众多制造厂长期努力的课题。曲轴圆角滚压工艺是提高曲轴强度的有效方法,在国内的多缸机行业,特别在汽车行业已得到了广泛地应用。文章借鉴多缸机曲轴圆角滚压对单缸柴油机曲轴圆角滚压工艺的可行性进行必要的探讨和研究。     

基于CSS技术的圆角矩形的实现

圆角矩形是网页设计中的常用元素,在页面布局时经常会用到,但至今尚没有一个完美的解决方案.在传统设计中,为了实现圆角矩形效果,大都使用带圆角的图片作为背景,这种方法必然导致对图片的反复调用,降低页面的加载速度,造成不良的用户体验.文章从一个新的角度出发,单纯使用CSS2.0技术实现了圆角矩形.这种方法不再需要调用图片,只调用简短的CSS代码,大大节省了网络带宽,同时取得了较优质的视觉效果,而且在不同种类和版本的浏览器中具有良好的兼容性.     

解读"圆的周长"

新世纪小学数学六年级上册"圆的周长"一课,教材是这样呈现的,如下图. 　　要为直径分别是5厘米和8厘米的两块圆镜镶边框(如下图),边框的长分别是多少厘米?(镜框厚度忽略不计)……     

教案：游在杭州—美丽的天堂

教学目标 1.初步学会从网上查找资料的方法。 2.初步学会把网页中的文字、图像复制到幻灯片中。 3.通过制作家乡(杭州)景点的幻灯片,进一步了解家乡的旅游资源,同时巩固幻灯片制作本领。 教学重点 学习把网页中的图片和文字复制到幻灯片中。 教学难点 1.删除复制到幻灯中的多余表格。 2.找到控制点,缩小复制到幻灯片中过长的表格边框。     

用EXCEL处理物理实验数据

许多物理实验是探索性实验,这类实验的特征就是依靠一定的实验装置进行测量,获得多组测量数据,然后对这些数据进行分析、处理,得到实验结论。Excel是一个功能强大、使用方便的电子表格软件,主要用于管理、组织和处理各种各样的数据,并能将数据生成表格、各式各样的图表、统计图形,而且可以对数据进行回     

Playing with computers,playing with ideas

In this article I react to the thoughts of Hennessey, addressing mainly the student, and Esquivel, addressing mainly the teacher. These authors present complementary, interesting, and consistent pictures of creativity education. Here I comment on a few issues that are less clear and discuss implications of these authors' work for computers in education. I conclude that teachers need to play with ideas about how they might use computers to build a culture that promotes deep, meaningful, and creative learning.Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the National Science Foundation.     

Choices with clients with profound hearing impairments

Kurt L. Johnson, Ph.D., and E. Jane Burkhead, Ph.D., are Assistant Professors with the Program in Counseling Psychology and Human Systems, Department of Human Services and Studies, at the Florida State University. D. Anthony Clark, M.S. is a Doctoral Candidate at the Florida State University.     

有理论的实验和有实验的理论

科学实验是科学认识的基础,没有科学实验就没有真正意义上的科学。近年来,发展心理学家对传统的研究方法作了创造性的改进,使研究对象有所扩大,研究内容有所拓展,从而对早期教育产生了更加丰富的实用价值。在儿童发展心理学中,实验法与其他方法的综合运用有着广阔的发展空间,但主流的方法依然是实验法。无论是哪一种研究方法,都必须坚持客观性原则。沉浸于后现代主义的相对主义和无政府主义思潮对科学发展和社会实践活动,包括对幼儿教育的发展是有害的。     

从容面对慢生

"没有天生的差生,只有有差异的学生"。差生一定程度上是教育本身制造的。"慢生"变为"差生"与教师有极大的关系。使"慢生"的成长速度加快,最关键的是想方设法激发慢生的内在积极性,使他们为自己的"大器晚成"保持自信和勇气。     

Parental sensitivity and attachment in children with autism spectrum disorder: comparison with children with mental retardation, with language delays, and with typical development

This study on sensitivity and attachment included 55 toddlers and their parents. Samples included children with autism spectrum disorder (ASD), mental retardation, language delay, and typical development. Children were diagnosed at 4 years of age. Two years before diagnosis, attachment was assessed with the Strange Situation procedure, and parental sensitivity and child involvement during free play were assessed with the Emotional Availability Scale. Parents of children with ASD were equally sensitive as parents of children without ASD, but their children showed more attachment disorganization and less child involvement. More sensitive parents had more secure children, but only in the group without ASD. Less severe autistic symptoms in the social domain predicted more attachment security. Autism challenges the validity of attachment theory.     

Using Assistive Technology with Individuals with Severe Disabilities

No abstract available for this article.     

Preschoolers' Relational Aggression with Siblings and with Friends

As part of a longitudinal study examining sibling and friend relationships in early and middle childhood, relational aggression by 4-year-olds and their interaction partners in semi-structured free play sessions with siblings and friends was examined during sibling sessions involving both same-gender and mixed-gender sibling pairs. Identifiable acts of relational aggression occurred during many of the interactions observed, but there was also a wide range in the amount of relational aggression produced. Both boys and girls used relational aggression with their siblings much more than they did with their friends. Although boys' and girls' relationally aggressive behaviors occurred at similar rates, the form and function of their relational aggression varied depending on the age and gender of their sibling.     

CASS工艺处理油漆生产废水

采用隔油——气浮——CASS——过滤工艺处理高浓度油漆生产废水，工程运行稳定，出水水质达到国家一级排放标准。     

浅析信托与代理、行纪的异同

在对信托与代理、信托与行纪进行比较的基础上,析出信托制度在财产管理方面灵活、安全、高效的优势.