■-知识与它的还原

利用单向S-粗集对偶,给出■-知识与■知识的F-还原概念,提出■-知识的F-还原定理与F-还原的属性补充冗余原理;单向S-粗集对偶是S-粗集的基本形式之一.

A Comparative Study of the L2 Pragmatic Competence of University Students in Hong Kong and the Chinese Mainland:The Contributions of Sociocultural Context and Linguistic Proficiency

This study investigates the differences in pragmatic competence between Hong Kong and Chinese mainland university students.Participants included 19 native speakers of English,115 Chinese mainland students,divided into those who had spent time abroad in an English-speaking country(CM A)and those who had not(CM NA),and 97 Hong Kong students,divided into those from an English-medium secondary school(Hong Kong EMI)and those from a Chinese-medium school(Hong Kong CMI).Linguistic proficiency was measured by a C-test,and pragmatic competence by a Metapragmatic Knowledge Test,an Irony Test and a Monologic Role Play.Group scores were compared using ANCOVAs to control for differences in proficiency.The results point to a continuum of pragmatic competence—EMI>CMI>CM A>CM NA—reflecting the groups’access to English in real-life contexts.The differences between the Hong Kong groups and the Chinese mainland groups were clearest in those tests measuring processing capacity(i.e.,Irony Response Time and the Monologic Role Play).CM A,but not CM NA,performed as well as the Hong Kong groups on measures of metapragmatic awareness.The results are discussed in terms of Bialystok’s(1993)distinction between analyzed representation and control of processing.

国内低氧训练研究现状的可视化分析

为了深入分析国内低氧训练研究的现状,运用CiteSpaceⅢ和CNKI的可视化功能对近20年来发表在国内体育核心期刊上有关低氧训练的文献进行计量学统计和可视化分析。结果表明,总体研究趋势以2008年为顶点呈正态分布,国内形成了凸显的科研力量。研究的热点主题包括低氧训练方式的多样化,低氧训练的监控,提高运动员的有氧和无氧能力,对机体的免疫力、认知功能的影响,在控重减肥中的应用,低氧训练干预下的氧化应激和细胞凋亡情况,低氧训练习服与基因多态性的关系,低氧训练对机体作用的分子机理的探讨等方面。新的低氧训练方式的应用、低氧训练的健康促进功能、低氧训练的分子机理的探讨和学科交叉成为今后的研究趋势。

基于无线传感器网络定位技术的图书馆智能管理创新

"互联网+"时代,信息技术的发展对图书馆的智能化管理工作提出了更高的要求。文章概述了无线传感器网络与定位技术,重点讨论了如何将WSN定位技术运用到图书智能管理,通过定位技术与大数据、云计算等信息技术的结合,推动图书馆智能系统建设和智能化发展。