试论自主学习的理论依据、内涵与特征

自主学习是学习主导自己的学习的主动建构的过程，是建立在教育的终身化、民主化和个性化等教育观上的一种教育策略。同时，自主学习也是一个相对意义上的概念，自主学习的自主不是绝对的。自主学习具有自主性、能动性、超前性、独立性、独特性、创造性等特点，自主性是自主学习的本质属性。     

MFC框架下三维场景的绘制与交互控制

通过一个实例,讲述了在MFC框架下使用OpenGL函数来快速构建一个可以交换控制的三维球体。MFC框架编程,在获得设备环境对象后,使用绘图函数完成绘图工作,并编辑应用程序菜单为菜单项连接处理函数。利用OpenGL开发库函数,在VC＋＋编译环境下,实现了三维物体的渲染。     

一种改进的特征点匹配算法

特征点匹配是计算机视觉中的关键步骤,在很多领域中都有着的重要应用。通过对当前图像特征点匹配方法的研究,提取一种基于特征点的灰度量和几何特征量相结合的匹配方法。该方法首先用Harris算法提取特征点;然后用极线约束减少搜索范围;最后用特征点的灰度量实现特征点匹配。该方法利用极线约束,克服了用灰度量进行特征点匹配计算量大的缺点,提高了匹配速度。实验表明,是一种准确快速的特征点匹配方法。     

A comparison of feature selection methods for an evolving RSS feed corpus

Previous researchers have attempted to detect significant topics in news stories and blogs through the use of word frequency-based methods applied to RSS feeds. In this paper, the three statistical feature selection methods: χ², Mutual Information (MI) and Information Gain (I) are proposed as alternative approaches for ranking term significance in an evolving RSS feed corpus. The extent to which the three methods agree with each other on determining the degree of the significance of a term on a certain date is investigated as well as the assumption that larger values tend to indicate more significant terms. An experimental evaluation was carried out with 39 different levels of data reduction to evaluate the three methods for differing degrees of significance. The three methods showed a significant degree of disagreement for a number of terms assigned an extremely large value. Hence, the assumption that the larger a value, the higher the degree of the significance of a term should be treated cautiously. Moreover, MI and I show significant disagreement. This suggests that MI is different in the way it ranks significant terms, as MI does not take the absence of a term into account, although I does. I, however, has a higher degree of term reduction than MI and χ². This can result in loosing some significant terms. In summary, χ² seems to be the best method to determine term significance for RSS feeds, as χ² identifies both types of significant behavior. The χ² method, however, is far from perfect as an extremely high value can be assigned to relatively insignificant terms.     

科技论文隐性学术不端行为判别特征分析

【目的】 总结隐性学术不端行为的特征,为识别与防范此类学术不端行为提供帮助。【方法】 分析从编辑实务中发现的3种隐性学术不端行为(不当署名、公式或图表抄袭及跨语种抄袭)的特征,举例说明根据这些特征判定相应不端行为的方法。【结果】 当稿件符合相应的隐性学术不端行为特征时,编辑需特别关注并判别该稿件的隐性学术不端行为。【结论】 编辑应提高存疑、甄别和审稿的意识,编辑部应加强名单、签名和沟通管理,共同努力为学术出版质量把关。     

非接触式手掌识别

单一掌纹特征难以全面描述手掌信息,导致识别率较低.为了提高识别率,提出了一种基于Gabor滤波的掌形、掌纹、关节融合手掌识别方法.首先对手掌图像进行预处理,然后提取手掌图像的特征,最后进行特征匹配.实验结果表明,融合多特征的方法是有效的.     

新工科建设背景下的高校科技智库发展路径探索

首先结合我国经济发展新旧动能转换以及国内外高等工程教育发展情况,分析高等工程教育改革的内在动力,简述新工科的提出与发展现状,梳理新工科建设过程中面临的主要问题。随后,概述智库的社会职能与特征,分析认为高校科技智库在新工科建设中的优势特色主要在于精准把握方向、聚焦顶层设计、紧贴企业主体。最后,基于高校科技智库兼具人才培养与政策咨询功能的实际,探讨高校科技智库完善自身建设的重点方向,提出着重从健全制度、建强团队、学科融合、项目申报、产业对接等方面加快高校科技智库建设。     

The relational antecedents of project-entrepreneurship: Network centrality, team composition and project performance

The relational antecedents of project-based enterprises have not yet received systematic investigation. These ventures are typically created by individual freelancers who are usually embedded in networks of collaborative relationships that convey the information and resources required to carry out new projects. Using a relational perspective of entrepreneurial discovery and team composition, we analyze the performance determinants of project-entrepreneurs, namely the individuals who are responsible for launching and carrying out those projects. We argue that project-entrepreneurs’ performance is related to their degree of centrality within the social network, and their familiarity with the selected project-team as captured by the distribution of ties among team members. We test our hypotheses within the Hollywood Film Industry over the period 1992–2003. The findings point to the existence of diminishing returns to centrality and performance benefits from assembling teams that combine old-timers and newcomers. The theoretical contributions and implications of the study are discussed.     

智能像卡联网门禁系统信息采集研究

智能像卡联网门禁系统为多门集中管理（如宾馆、办公楼等）提供了一种新型的工作模式,实现这一工作模式的首要任务是进行像卡信息的采集.该文提出一种基于PC机线程像卡测量空间自传送的方法.像卡测量空间由单片机系统控制红外对管阵列而获得,经RS232总线送往联网系统上位机即PC机,PC机采用串口线程工作方式实现实时接收,在主线程中对测量空间进行整定、规范等前置处理工作.此过程的高质量完成,不但为智能像卡联网门禁系统这一新型多门集中管理工作模式的成功实现打下坚实基础,而且为以智能像卡作信息载体的新型模式输入设备的研发提供了可行性依据.     

基于嵌入式应用的指纹识别系统设计与实现

随着指纹识别技术的发展和嵌入式系统的广泛应用,指纹识别逐渐向嵌入式方向发展。本文利用Fujitsu公司的电容式固态指纹传感器MBF200、Samsung公司的ARM S3C2410处理器和uC/OSⅡ操作系统,扩展了相应外部设备,构建了一个通用型基于嵌入式应用的指纹检测与处理模块的指纹识别系统。通过实验验证,该系统能够完成指纹图像的获取与匹配工作。