关于复射影空间中全实极小子流形的注记     

舒世昌 《咸阳师范学院学报》1995,(6)

本文给出发射影空间中全实极小子流形曲率拼挤（Pinching）的几个定理，它们分别改进了沈一兵教授的有关Pinching定理。  相似文献   

Making sense of learner and learning Big Data: reviewing five years of Data Wrangling at the Open University UK     

Bart Rienties  Simon Cross  Vicky Marsh  Thomas Ullmann 《Open Learning》2017,32(3):279-293

Most distance learning institutions collect vast amounts of learning data. Making sense of this ‘Big Data’ can be a challenge, in particular when data are stored at different data warehouses and require advanced statistical skills to interpret complex patterns of data. As a leading institute on learning analytics, the Open University UK instigated in 2012 a Data Wrangling initiative. This provided every Faculty with a dedicated academic with expertise data analysis and whose task is to provide strategic, pedagogical and sense-making advice to staff and senior management. Given substantial changes within the OU (e.g. new Faculty structure, real-time dashboards, two large-scale adoptions of predictive analytics approaches, increased reliance on analytics), this embedded case study provides an in-depth review of lessons learned of five years of data wrangling. We will elaborate on the design of the new structure, its strengths and potential weaknesses, and affordances to be adopted by other institutions.  相似文献   

Objectivity as standardization in data-scientific education policy,technology and governance     

Ben Williamson  Nelli Piattoeva 《Learning, Media and Technology》2019,44(1):64-76

ABSTRACT

New data-driven technologies appear to promise a new era of accuracy and objectivity in scientifically-informed educational policy and governance. The data-scientific objectivity sought by education policy, however, is the result of practices of standardization and quantification deployed to settle controversies about the definition and measurement of human qualities by rendering them as categories and numbers. Focusing on the emerging policy agenda of ‘social and emotional learning and skills,’ this paper examines the practices of ‘objectivity-making’ underpinning this new field. Objectivity-making depends on three translations of (1) scientific expertise into standardized and enumerable definitions, (2) standardization into measurement technologies, and (3) the data produced through measurement technologies into objective policy-relevant knowledge, which consolidates a market in SEL technologies. The paper sheds light on knowledge-making practices in the era of big data and policy science, and their enduring reliance on the precarious construction of objectivity as a key legitimator of policy-relevant scientific knowledge and ‘evidence-based’ education governance.  相似文献   

高职大学生"习得性无助感"初探     

平延勋 《九江职业技术学院学报》2006,(3):12-13

近几年，高职教育在我国蓬勃发展，渐成燎原之势，因此，高职教育研究也成了人们关注的热点。本文通过对高职大学生“习得性无助感”的初步探讨，认为“习得性无助感”产生的原因，主要是社会的错误观念，教师的不当教育方式，同学的错误影响以及他们自己的错误归因，并据此提出了解决办法。  相似文献   

英美澳远程教育质量评估体系研究及启示     

张树玲  陈丽  孙波 《现代远程教育研究》2011,(1):61-66

在高等教育大众化及教育现代化的背景下,远程教育质量已经引起世界各国的高度重视。不同国家或机构依据自身国情及教育环境,在不同的价值取向和质量观指导下,形成各自的远程教育质量评估体系。近十年我国远程教育质量评估文献表明：从外部评估角度来看,英国、美国、澳大利亚的现代远程教育质量评估体系在质量观、评估标准、执行者、过程及效果反馈等方面有各自的特征,且具有较好的实施效果。我国在建立远程教育质量评估体系时,可以在结合自身国情的基础上,借鉴他国的有益措施。  相似文献   

Narrative Patterns Research in O·Henry's Novels     

王丽君  邓薇薇 《海外英语》2011,(8):350-352

O·Henry is living in the time when novelists are in the great pursuit of narrative pattern research. Hence his works is inevitably influenced. Beside his humorous language, surprising ends and expressions, O·Henry’s novels in my opinion is also marvelous for his outstanding narrative patterns arrangement. In this article, a research will be conducted onto his narrative pattern in the aspects of narrative perspectives, narrative space and narrative time. By this research, more information and references is intended to obtain for the further study on this area.  相似文献   

英国高等教育外部质量保障体系与牛津大学研究生教育     

蒋馨岚 《教育与现代化》2011,(2):80-86

英国高等教育外部质量保障体系包括英国高等教育基金委员会、高等教育质量保障署、专业机构和新闻机构等社会组织。牛津大学研究生教育处于英国高等教育外部质量保障体系之下同时又保持本身的自治传统。英国高等教育外部质量保障体系很好地促进了牛津大学的研究生教育的内部质量保障建设。这些成功的经验对我们的研究生教育的质量保障有重要的启示。  相似文献   

乌兰察布地区胡萝卜优化施肥方案初步研究   总被引：1，自引：0，他引：1  

穆俊祥  曹兴明  刘拴成  韩海霞  姚林柏 《集宁师专学报》2011,33(4):22-25

本试验通过正交旋转回归设计在乌兰察布地区选取氮、磷、钾和有机肥为参试变量,以胡萝卜产量为目标函数,建立了胡萝卜产量与参试因子间的数学模型,得出了各变量与产量的主次关系及各因素对产量的效应。最后,通过模拟寻优获得了本试验地条件下胡萝卜产量高于6000kg/667m2的施肥方案：N（8.06-8.72kg/667m2）、P2O5（3.89-4.26kg/667m2）、K2O（19.10-20.45kg/667m2）、有机肥（6346-6907kg/667m2）。  相似文献   

基于视频的数据挖掘系统的研究     

申华 《鞍山师范学院学报》2004,6(4):62-64

研究了一种视频数据挖掘的系统结构.介绍了该系统中各主要模块的功能;描述了视频数据预处理和视频数据立方体;讨论了视频数据挖掘方法并探讨了典型的视频挖掘技术.  相似文献   

Metaphors we’re colonised by? The case of data-driven educational technologies in Brazil     

Giselle Martins dos Santos Ferreira  Luiz Alexandre da Silva Rosado  Márcio Silveira Lemgruber  Jaciara de Sá Carvalho 《Learning, Media and Technology》2020,45(1):46-60

ABSTRACT

This article discusses issues concerning the spread of data-driven educational technologies in Brazil. Here, as elsewhere, educational technology continues to be promoted optimistically as the bearer of a panacea for historically-rooted social problems. Whilst some of these technologies have indeed contributed to important widening-participation programmes in the last two decades, widespread advocacy of technological ‘solutionism’, reflected in gradually stronger policy demands for efficiencies to be improved through ‘innovation’, has supported a relentless marketisation of the country’s educational systems. As transnational corporations position themselves to take control of key areas of these systems, threatening to restructure the whole sector, data-driven educational technologies provide the latest example in a series of ‘new’ ideas offered in an ever-expanding market. Based on the notion of ‘conceptual metaphors’, which encapsulate specific ways of perceiving, thinking and relating with the world, this article examines key metaphors underpinning discourses surrounding data-driven educational technologies in Brazil. In particular, the article analyses ways in which these specific metaphors may be promoting perspectives that ignore difference and obscure broader questions concerning education, thus contributing to the reproduction of previously existing problems and supporting new forms of colonisation.  相似文献