食品中亚硫酸盐使用及检测方法的研究进展

亚硫酸盐是一类在食品中广泛使用却常被忽视的添加剂,不恰当的使用会对人体造成一定的损伤.笔者综述了食品中亚硫酸盐的使用及检验方法,并讨论了各种检测方法的优缺点.旨在对食品生产过程中亚硫酸盐的使用及检测起到一定的指导作用.     

改善和提高参数单侧假设检验教学效果的实践与探索

分析了参数单侧假设检验教学的现状和存在的问题,提出和论证在该部分内容的教学中应注意讲好思想方法、确定好小概率事件和适当介绍参数单侧检验中原假设的确立原则。通过加强这三个方面的工作,以期缓解学生学习的畏难情绪,提高学生的学习兴趣,从而有效改善和提高参数单侧假设检验的教学效果。     

碳管法燃煤烟气汞浓度取样装置研制

自主研制了包括内置吸附剂和两段式碳吸附管在内的整套新型碳管法烟气汞浓度取样装置,以期实现燃煤烟气中颗粒汞和气相总汞浓度的精确测量．在6 kW 燃煤循环流化床装置上同时采用碳管法与安大略标准法（OHM）进行烟气中汞浓度取样．结果表明,碳管法所得汞平衡率均处于95．47％～104．72％之间．不同工况下碳吸附管第2段穿透率始终低于2％,且与相同工况下 OHM 测试结果的相对偏差在15．96％～17．56％之间,均小于20％．结果表明,所研制的碳吸附管干法烟气汞浓度取样装置符合美国 EPA 质量保证和质量控制（QA／QC）标准,可应用于实际燃煤烟气汞浓度的取样测试．     

‘I’m just a numbers person’: the complexity,nature and effects of the quantification of education

This paper draws upon the sociology of numbers, particularly work by Theodore Porter, to reveal the multifarious ways in which numbers actively constitute practices in schools. Drawing upon a case study of one low-performing school in a low-performing region in the state of Queensland, Australia, and theorising into the sociology of numbers, the research explores the complex ways in which numbers came to constitute and dominate the practices in this school site under a broader national, state and regional policy context demanding rapid improvements in various forms of standardised tests and associated practices. Specifically, the research reveals a strong and simultaneous focus by teachers upon a variety of numeric data collected at national, regional and local levels, and intricate relations between these data; multiple visualisation, triangulation and comparison approaches towards such data in virtual and physical formats; and the enumerative nominalisation of both students and their reading attainment in relation to specific, concretised levels of achievement and various types of scale scores. The research cautions against the sheer volume of such enumerative practices, which, while productive of teachers’ understandings of student capacity against standardised measures of achievement, may also lead to a more reductive view of education, dominated by concerns about achievement in standardised tests (and associated practices) alone.     

Education as a ‘risky business’: Theorising student and teacher learning in complex times

This paper employs sociological literature on risk and the commodification of education to explain current schooling practices in a context of increased concerns about students’ behaviour and results on standardised tests of achievement. Drawing upon teacher and student learning practices in three school sites in south-east Queensland, Australia, the article reveals how specific tests, packages and programmes have been employed as technologies of governance to minimise the risk of adverse student behaviour, maximise student outcomes on standardised tests, and provide teachers with discrete learning experiences construed as improving such outcomes. The sum total of these foci is the construction of education as an increasingly ‘risky business’ which employs a myriad of products and tests to manage perceived and actual risks. The paper also reveals how these products and processes constitute student misbehaviour and inadequate teacher and student learning as ‘risk objects’ requiring constant intervention, but which also inhibit inclusion in schooling settings, and challenge teachers’ professionalism.     

基于知识链接的文献服务策略

以知识管理的视点,阐述了E时代文献信息的特点以及用户对文献检索的新需求,以知识集成替代文献堆积为基点,以知识链接的系统集成为路径,以提高检索与知识再应用质量为目标,探讨了知识元集成和知识群链接的路径,研究了图书文献服务部门如何面向用户需求,发挥检索工作者管理能力、研究能力和创新能力,通过对文献信息资源的深度挖掘,实现从信息到知识再到智慧的转变,提高文献服务的附加值,以显著提高用户对于知识的应用和创新能力的问题。     

某任务管理计算机航电系统测试与研究

为了解决某机载任务管理计算机航电系统测试设备对故障的快速定位及故障诊断、隔离问题,对机载计算机航电测试设备的系统结构、硬件、软件进行了分析,阐述了系统测试设备的设计思想及实现方法,最后通过对机载任务管理计算机各模块故障模拟、数据分析,对测试系统设备进行了评价,验证了某机载任务管理计算机测试设备设计的合理性和可靠性,为机载计算机测试系统设计、研发、故障隔离诊断提供借鉴和参考。     

语言测试公平性研究回顾及其思考

近几年来语言测试公平性问题吸引了越来越多测试专家的关注。值得注意的是,当人们谈到语言测试公平性问题的时候,首先想到的就是公平性的定义,以及如何进行公平性的检验。然而,对公平性研究进行回顾是更好地了解公平性定义以及更好地制定出适用于公平性检验的指导性原则的前提。通过相关文献的查阅,文章总结出了迄今为止公平性问题研究所经历的三个阶段,并对语言测试公平性的相关问题进行思考与展望。     

对新课程背景下初中体育教学单元设计的科学探讨

新形势下,为了保证初中体育新课程标准在学校体育教学中的顺利实施,初中体育教师在体育课堂教学过程中就需要制订科学且合理的单元教学计划,来指导初中体育课堂教学的顺利开展。优质的教学单元设计可以为体育课堂教学活动提供高质的行动纲领,使初中体育教师可以在日常教学工作中达到事半功倍的效果。反之,如果忽视教学单元设计不仅仅难以获得良好的教学效果,而且很容易导致初中体育教学走上弯路,一定程度上会影响到初中体育教学任务的顺利完成。因此,如何制订科学有效的初中体育教学单元设计,已经成为广大初中体育教师进行新课程改革必须面对和解决的重要问题。     

工科非电专业电工学教考模式的几点思考

电工学是工科院校非常重要的一门技术基础课,本文基于不同专业对电工学教学的要求,从内容设置、教学模式及考核模式几个方面进行了一些思考,并针对不同专业提出了案例教学的实例,以期能够把基础课的教学与专业方向紧密联系起来,用生动的教学方式激发学生学习这门课程的积极性。