数据库安全与保密技术   总被引：3，自引：0，他引：3  

许俊  郑家光 《四川职业技术学院学报》2006,16(1):112-113

介绍数据库安全保密的重要意义和评估安全数据库的相关标准,讨论保证数据库安全的技术方法和管理措施, 并就MS SQL安全问题提供解决方案．  相似文献   

数据交叉表在实际生活中的应用与理论分析     

魏连秋  张义红 《衡水学院学报》2006,8(1):39-41

数据库在计算机发展的今天已经越来越广泛地被使用,而数据库中数据的多种形式变换更是经常的,其中行列数据的变换是较难的,通过对该问题进行深入分析,联想到关系表中数据的逻辑形式,利用Excel的数据透视表和VFP中的交叉表来实现行列数据交换较为合适,进而利用SQL查询语句分析了行列数据交换的实质。  相似文献   

C语言和PASCAL语言的对比学习     

黄晓因 《思茅师范高等专科学校学报》2003,19(3):27-29

掌握了一门程序设计语言后学习其它的语言课程，应有意识地进行对比。文中重点从数据结构、语言工具两个方面比较了C语言和PASCAL语言的异同并进一步指出：在学习进程中贯穿对比思维，可达到事半功倍、温故知新的效果。  相似文献   

建筑设计中PDM系统开发的关键问题及其实现技术     

焦思红  屈云光 《北京工业职业技术学院学报》2003,(4)

根据PDM系统建设的实际,提出了开发PDM系统中的几个关键问题,主要包括角色管理、工作流管理、片本控制以及应用软件集成等,对于每一种问题均给出了相应的解决方案。  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   

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   

企业新计量信息流转模型和新自动计量模型设计与实施的应用研究     

陈小文  李雅男 《辽宁科技学院学报》2019,21(1):23-25

文章讨论了基于信息化数据通讯流转原理和现场自动控制理论,研究了冶金制造企业大宗原燃料、成品、半成品和产品新计量信息流转模型和新自动计量模型设计与实施的现代信息流转和自动称量达到自动、稳定、正确、可靠、合理、可追溯的问题,通过在本钢集团公司ERP、EMS系统配套运行和现场轧钢线计量称重实施等线上操作的手段来实现应用研究。解决了企业新计量信息流转模型和新自动计量模型设计与实施的问题,达到了计量信息系统的提出"数出一门,量出一家"和"网络化自动运行"要求,为冶金制造行业解决此类问题提供了新的思路和方法,具有极大的推广和应用价值。  相似文献   

内部会计控制的若干问题     

董多多 《温州职业技术学院学报》2002,2(4):10-11,19

内部会计控制制度是企事业单位加强内部会计监督的一项基础管理措施，目前在部分企事业单位中由于制度建设不健全，内部控制管理松懈，会计监督失控，出现了一些经济犯罪和腐败现象，为此，笔者就内部会计控制的若干问题进行探讨，提出相应的对策。  相似文献