Testing the double-deficit hypothesis in an adult sample

The double-deficit hypothesis of dyslexia posits that reading deficits are more severe in individuals with weaknesses in phonological awareness and rapid naming than in individuals with deficits in only one of these reading composite skills. In this study, the hypothesis was tested in an adult sample as a model of reading achievement. Participants were parents of children referred for evaluation of reading difficulties. Approximately half of all participants reported difficulty learning to read in childhood and a small subset demonstrated ongoing weaknesses in reading. Structural equation modeling results suggest that the double-deficit hypothesis is an accurate model for understanding adult reading achievement. Better reading achievement was associated with better phonological awareness and faster rapid automatized naming in adults. Posthoc analyses indicated that individuals with double deficits had significantly lower reading achievement than individuals with single deficits or no deficits.     

Spelling consistency affects reading in young Dutch readers with and without dyslexia

Lexical-decision studies with experienced English and French readers have shown that visual-word identification is not only affected by pronunciation inconsistency of a word (i.e., multiple ways to pronounce a spelling body), but also by spelling inconsistency (i.e., multiple ways to spell a pronunciation rime). The aim of this study was to compare the reading behavior of young Dutch readers with dyslexia to the behavior of readers without dyslexia. All students participated in a lexical-decision task in which we presented pronunciation-consistent words and pseudowords. Half of the pronunciation-consistent stimuli were spelling consistent and the other half were spelling inconsistent. All three reader groups, that is, students with dyslexia, age-match students, and reading-match students, read spelling-consistent words faster than spelling-inconsistent words. Overall reading speed of students with dyslexia was similar to that of reading-match students, and was substantially slower than that of age-match students. The results suggest that reading in students with or without dyslexia is similarly affected by spelling inconsistency. Subtle qualitative differences emerged, however, with respect to pseudoword identification. The conclusion was that the findings were best interpreted in terms of a recurrent-feedback model.     

成功参考咨询虚拟团队组织结构特征分析

介绍了参考咨询虚拟团队产生的背景及参考咨询虚拟团队的内涵．并着重分析了成功参考咨询虚拟团队所应具有的动态的弹性组织结构、扁平化的组织模式、柔性化的组织架构、开放多样化的组织边界、网络化的组织关系、信任和契约并存的组织管理方式等组织结构特征,以期为参考咨询虚拟团队的建设提供有益的借鉴。     

关于我国团体名称规范检索点的思考

文章从适应虚拟国际规范文档的需求出发,列出了目前我国中文团体名称规范检索点存在的问题,从理论上或实践中进行了讨论。呼吁要搭建交流和沟通的平台,协调编目机构之间规则上的差异,以期最终形成全国统一的编目规则,以使能适应虚拟国际规范文档的需求。     

易于流道加工的三板模模仁结构改进设计

设计一种模仁结构,用于三板模注塑成型生产中,可改善电极加工及模仁浇口抛光,同时明显降低加工成本及加工时间。采用该种形式的的三板模模仁流道改进结构,可使电极制造简单,既有利于降低生产成本,又可使生产效率显著提高,具有很好的应用前景。     

基于组合特征的在线商标图像检索系统设计

提出一种基于组合特征的在线商标图像检索系统设计方法,该方法利用颜色直方图匹配、二维傅立叶形状描述子,及二维傅立叶变换形状描述方法与Zemike矩相结合的组合形状描述子,从粗到细、多层次提取商标图像形状特征,用欧氏距离度量形状相似性。用标准MPEG-7的CE2B图像库和1000多张商标图像库进行检索实验,并与现有方法进行比较,表现出其较好的检索性能。     

研发成果溢出和研发投资溢出下的企业R＆D策略研究

在存在研发成果溢出与研发投资溢出时,建立了以产量竞争的古诺双寡头两阶段博弈模型。在四种不同的R＆D策略下,比较了两种溢出方式下企业的R＆D水平。研究表明：当存在研发成果溢出时,与存在研发投资溢出相比,企业有较高的R＆D水平;当存在研发投资溢出时,每个企业的R＆D水平随着溢出水平的提高而下降;在没有溢出效应时两个模型是等价的。从促进技术进步的角度来看,无论是存在研发成果溢出还是存在研发投资溢出,在四种策略中,研究联合体策略优于其他任何一种策略。     

纳米晶对Er3＋离子各能级动态布居的影响

根据前驱玻璃和纳米晶结构玻璃陶瓷中Er3＋的强度参量,分别计算了各能级间的跃迁几率,建立了描述动力学过程的速率方程,证实了纳米晶结构能有效增加4F9/2能级的粒子布居数,同时减少4I9/2能级的粒子布居数.     

正项级数敛散性比较判别法推广Ⅰ及Ⅱ

对于正项级数敛散性的判别研究经历了较长的发展过程,Raabe判别法和D`Alembert判别法研究了在定理假设条件下r1与r1时的情况,而r=1时情况却没有解决。在对Raabe判别法和D`Ale-mbert判别法r=1时的情况进行了研究,对已有方法加以进一步推广,归结为结论———正项级数敛散性判别法推广Ⅰ及Ⅱ。     

基于高频链技术的逆变电源设计

文章设计实现了一种基于ARM7的高频链逆变电源.首先介绍逆变电源采用高频链逆变技术的优势,然后具体针对100 VA高频链逆变电源进行主电路和控制方案的设计,最后给出相应的仿真波形,证明了该逆变电源具有良好的性能.