Δ-distance: A family of dissimilarity metrics between images represented by multi-level feature vectors

This article presents the Δ-distance, a family of distances between images recursively decomposed into segments and represented by multi-level feature vectors. Such a structure is a quad, a quin or a nona-tree resulting from a fixed and arbitrary image partition or from an image segmentation process. It handles positional information of image features (e.g. color, texture or shape). Δ-distance is the generalized form of dissimilarity measures between multi-level feature vectors. Using different weights on tree nodes and different distances between nodes, distances between trees or visual similarity between images can be computed based on the general definition of Δ. In this article, we present three Δ-based distance families: two families of distances between tree structures, called -distance( for Tree) and -distance ( for Segment), and a family of visual distances between images, called ( for Visual). The -distance visually compares two images using their tree representation and the other two distances compare the tree structures resulting from image segmentation. Moreover, we show how existing distances between multi-level feature vectors appear to be particular cases of the Δ-distance     

5种全文电子期刊数据库的评价分析

以Elsevier SDOS、Kluwer Online、IEEE/IEE、Springer Verlag和Academic Press 5种常用的全文电子期刊数据库为例,对其学科分布、被SCI、SSCI权威数据库收录的比重以及JCR期刊影响因子分析等几个方面进行评价分析,并讨论这些电子期刊对图书馆期刊管理的影响。     

利用XML实现图书馆Web数据库的动态发布

介绍了XML以及基于XML的三层C/S模型，探讨了利用XML实现图书馆Web数据库动态发布的设计思想，并通过示例展示了基于XML的图书馆Web数据库动态发布的具体实现。     

‘It's The Catcher in the Rye… He said it was the kind of book you made your own': Finding Holden in Contemporary YA Literature

Published in 1951,The Catcher in the Rye encapsulated teenage angst. Some time ago David Belbin mused about the influence of Catcher on the proliferation and popularity of YA literature. Salinger's recent death has sparked a renewed interest in his work and more attention on Holden and his inheritors. This article discusses how five recent adolescent novels, with male protagonists, mirror Holden's adolescent paralysis. They exist in a liminal state between childhood and adulthood, attempting to understand the phonies around them. These protagonists help define the nature of the ‘lost’ adolescent in the current golden age of YA literature.     

输煤控制系统硬件结构与上位机监控软件设计

根据工况将不同的设备组合成不同的工作流程，以集散控制技术为基础，应用PLC网络实现了对输煤设备的现场控制、电控室控制和中控室控制。并以FIX软件为工具，通过定义PLC的I/O端口映射表方法，以时间、事件、故障为触发手段，设计了实时监控软件，并实现了输煤量与数据库系统的数据接口。     

名人代言目的地对旅游者态度和行为的影响

聘请名人担任形象代言人逐渐成为一种流行的目的地营销策略,但旅游学界对名人代言的研究才刚刚起步。采用准实验设计研究方法,以大学生为样本收集数据,使用结构方程模型检验了名人代言的主流范式“一致性假说”在旅游研究领域的适用性。研究发现：①名人/目的地一致性通过名人可信度影响旅游者的目的地态度和旅游意向,即旅游者感知到名人形象与目的地形象越一致,他们对该名人担任代言人的信任度就越高,进而就会对其代言的目的地形成好感并产生较强的旅游意向;②名人/自我一致性通过名人认同影响旅游者的目的地态度和旅游意向,即旅游者感知到名人形象与自我形象越相似,他们对该名人的认同度就越高,因而对其代言的目的地就会产生较好的态度和较强的旅游意向。     

基于我国政务网站的信息公开与信息共享实证分析

通过对26个优秀政府网站调查的实证分析，找出在信息公开与信息共享过程中存在的一些问题，并针对这些问题提出相应的建议。     

数字资源整合及检索初探

本文介绍了目前整合数字资源的方式以及相关标准、协议和接口技术,讨论了数字资源整合系统的信息检索原理及跨语言翻译、学科专业分类表、检索语言转换等问题,分析了数字资源整合研究将面临的挑战。     

Using 21st century video prompting technology to facilitate the independence of individuals with intellectual and developmental disabilities

Barriers in acquiring, maintaining, and generalizing daily living skills are factors that contribute to discrepancies in independent living outcomes among transition age youth and young adults with intellectual and developmental disabilities (IDD). Acquisition and generalization of daily living skills empowers transition age youth and young adults with disabilities to meet their own needs with minimal reliance on others. Infusing the use of technology as a self‐prompting device facilitates the acquisition of tasks that may not be otherwise attainable. In this study, self‐directed video prompting on an iPad with the My Pictures Talk application was used to help young adults with IDD in a postsecondary program acquire daily living skills in a single subject, multiple probe across subjects design. The effects of the intervention on generalization to tasks that were one, two, and three components different were also assessed. Results demonstrated a functional relationship between the introduction of the intervention and improvement in skill performance.