基于网页摘要分析的元搜索引擎研究*

针对目前搜索引擎返回结果的海量性，构建一个元搜索引擎，旨在高效利用多个成员搜索引擎返回的结果。介绍元搜索引擎的基本架构及当前结果融合的主要方法，应用统计学方法研究网页标题、网页摘要与网页文本之间的相关性关系，从而确定相关度权值进行结果相关性判断。实验证明，元搜索引擎搜索结果的平均准确率比各个成员引擎的搜索结果平均准确率都有较大提高。     

Strength in Numbers: Encouraging Every Staff Member to Work to Capacity

Libraries play a critical role in enhancing the learning landscape of the schools they support. In order for any library to become a powerhouse and a community meeting place, all library team members need to align with the library's vision, own it and begin to add their own strengths and talents purposefully. This article explores practical strategies for developing a visionary team, including supportive leadership, daily stand-up meetings, weekly staff meetings, special-focus teams, rostering and the “five conversations” approach. These effective strategies can be implemented across a broad range of library workforce contexts in order to ensure the most effective workforce teams are built.     

Destined to Design? How and Why Australian Women Choose to Study Industrial Design

Despite over three decades of legislation and initiatives designed to tackle the traditional gender divide in the science, technology and design fields, only a quarter of the registered architects in Australia are women. There are no statistics available for other design disciplines, with little known about why women choose design as a career path and who or what influences this decision. This qualitative research addresses this knowledge gap, through semi‐structured in‐depth interviews conducted with 19 Australian women who completed an industrial (product) design degree. Thematic analysis revealed three key themes: childhood aptitude and exposure; significant experiences and people; and design as a serendipitous choice. The findings emphasise the importance of early exposure to design as a potential career choice, highlighting the critical role played by parents, teachers, professionals and social networks.     

统计图形数据库参数设计方法

本文通过具体的实例,利用 2.13Ⅰ的特显命令,在dBASEⅢ PLUS下设计了一个图形数据库,为实现统计图形参数设计提供一方法。     

Sex,sport and justice: reframing the ‘who’ of citizenship and the ‘what’ of justice in European and UK sport policy

Universalist claims are often made about sport which is, as a consequence, increasingly written into national and international policy as an entitlement of citizenship or even human right. Further, in most countries physical education (PE) is a compulsory component of children's education, and sport is seen as central to this. Consequently, in the interests of justice sport must aspire to be egalitarian, that is, relevant to and meaningful for boys and men, and girls and women. In this context three fundamental questions are asked in relation to sport: (1) Do all citizens want to participate? (2) Who counts as a citizen? and (3) What are justice and equality? Feminist political and citizenship theory particularly the work of Pateman, Lister and Fraser is used to explore these questions and interrogate the ‘who’ of citizenship and the ‘what’ of justice in relation to framing sport policy in Europe and the UK. It is argued that notwithstanding the extensive use of the Council of Europe definition of sport,¹1. ‘“Sport” means all forms of physical activity which, through casual or organised participation, aim at expressing or improving physical fitness and mental well-being, forming social relationships or obtaining results in competition at all levels' (CE, 1992 CE. (1992/2001). European sports charter. Retrieved from https://wcd.coe.int/ViewDoc.jsp?Ref=Rec(92)13&;Sector=secCM&;Language=lanEnglish&;Ver=rev&;BackColorInternet=9999CC&;BackColorIntranet=FFBB55&;BackColorLogged=FFAC75 [Google Scholar]–2001 CE. (1992/2001). European sports charter. Retrieved from https://wcd.coe.int/ViewDoc.jsp?Ref=Rec(92)13&;Sector=secCM&;Language=lanEnglish&;Ver=rev&;BackColorInternet=9999CC&;BackColorIntranet=FFBB55&;BackColorLogged=FFAC75 [Google Scholar]). and despite or even because of the widespread adoption of the language of gender equality and gender mainstreaming, although formal sport citizenship rights might be accorded to all individuals and regarded as gender neutral, this masks a discourse of androcentric sport citizenship. This has captured European and UK sport policy and provision and is hindering further progress towards gender justice in sport and therefore PE. Given the universal and compulsory aspirations of sport particularly within PE, gender justice should be conceptualised not only as cultural recognition, political representation and economic redistribution within the normalised frame of competitive performance sport or ‘sport for sports sake’; but also as a critical meta-political remapping and reframing of sport as sport and physical recreation or ‘sport for all’.     

Key Stage 3 Pupils’ Views About Reading

Recent developments in literacy teaching have tended to target the needs of primary, rather than high school pupils and focus on technical, rather than affective aspects of reading. This paper describes a questionnaire‐based study undertaken to identify perceptions and views held by Key Stage 3 readers of different ages, genders and abilities. Outcomes support previous research, indicating differences between boys and girls and older and younger pupils, particularly in relation to reading preferences. Reading engagement appears to be linked to reading ability. EPs are challenged to offer perspectives that can contribute to literacy development at casework and curriculum levels.     

基于UML的汽车动力传动系统优化匹配专家系统建模与开发

UML是面向对象技术的一个重要应用,也是软件工程环境中对象分析和设计的重要工具.文章以汽车动力传动优化匹配专家系统为背景,探讨了利用统一建模语言对该系统进行需求分析,建立了系统的静态模型和动态模型,实现了对象模型转化为代码.通过实例表明用UML进行建模使得系统具有实用性、规范性和有效性.     

Reversing the Downward Spiral of Science Instruction in K-2 Classrooms

This study investigated the extent to which teacher professional development led to changes in science instruction in K-2 classrooms in rural school districts. The research specifically examined changes in (a) teachers’ content knowledge in science; (b) teachers’ self-efficacy related to teaching science; (c) classroom instructional time allotted to science; and (d) instructional strategies used in science. The study also investigated contextual factors contributing to or hindering changes in science instruction. Data sources included a teacher survey, a self-efficacy assessment, content knowledge tests, interviews, and classroom observations. After one year in the program, teachers showed increased content knowledge and self-efficacy in teaching science; they spent more instructional time on science and began using different instructional strategies. Key contextual factors included curricular demands, resources, administrative support, and support from other teachers.     

生物学教学中合作学习策略初探

合作学习是新课程理念的新颖产物，合作学习作为一种新理念正在广泛地应用于课堂教学中。就合作学习在生物学教学中如何设计教学的整体目标、如何设计教学课型进行了初步的探索，试图找到一条即符合客观规律，又适合自己和本校学生特点的方法，使每个学生在参与的过程中体验学习的快乐。促进学生形成良好的非认知品质。     

Co-benefit of hazardous trace elements capture in dust removal devices of ultra-low emission coal-fired power plants

The co-benefit of hazardous trace elements such as mercury (Hg), arsenic (As), and selenium (Se) capture in dust removal devices of ultra-low emission coal-fired power plants was investigated. Feed fuel and ash samples collected from 15 different coal-fired power units equipped with ultra-low emission systems were characterized to determine the concentrations and distribution characteristics of trace elements. It was found that the low-low temperature electrostatic precipitator (LLT-ESP) and the electrostatic fabric filter (EFF) had greater abatement capacity for Hg than normal cold-side ESP (CS-ESP). Only 0.8%–36.1% of Hg escaped from LLT-ESP and EFF, whereas 42.1%–90.6% of Hg escaped from CS-ESP. With the employment of EFF and ESP (inlet temperature<125 °C), 72.3%–99.1% of As and 70.7%–100% of Se could be captured before the wet flue gas desulfurization (WFGD) system. The significance level of the effects on the abatement capacity for Hg, As, and Se in ESP were analyzed by the Pearson correlation analysis and grey relational analysis. The results indicated that the low inlet temperature of LLT-ESP had significant promotional effect on the simultaneous removal of Hg, As, and Se. The smaller particle size of fly ash can be conducive to the adsorption of hazardous trace elements. The inhibitory effect of sulfur content in coal was significant for the enrichment of Hg and Se in fly ash.