构建网络安全防护体系

随着计算机技术和通信技术的发展,计算机网络将日益成为工业、农业和国防等方面的重要信息交换手段,渗透到社会生活的各个领域.网络安全问题日益突出,为了提高网络的整体安全水平必须全方位的构建网络安全防护体系,本文介绍网络安全防护体系的构建过程,并描述网络安全防护体系结构.     

A color image segmentation method as used in the study of ancient monument decay

In the cultural heritage area, it is of fundamental importance to characterize and classify the conservation state of the materials constituting ancient monuments, in order to study and monitor their decay. Generally, the decay diagnosis is provided by “naked eye” analysis done by expert scientists “walking around” the artifact and recording the conservation state of each individual element they observe. In this paper, a color image segmentation approach, based on histogram threshold and edge detection techniques is presented, to extract degradation regions, characterized by holes or cavities, from color images of stone-materials. The goal is to provide an aid to the decay diagnosis by segmenting degraded regions from color images, computing quantitative data, such as the area and perimeter of the extracted zones, and processing qualitative information, such as various levels of depth detected into the same zones. Since color is a powerful tool in the distinction between objects, a segmentation technique based on color, instead of intensity only, has been used to provide a clearer discrimination between regions. The study case concerns the impressive remains of the Roman Theatre in the city of Aosta (Italy). In particular, we have processed and analyzed some color images of the theatre puddingstones, acquired by a camera.     

竞赛中运动员的心理障碍与心理训练

心理因素是现代竞技体育比赛中十分重要的一个训练环节,它是取得胜利的主要手段。从理论分析出发,运用体育运动心理学的有关知识,简要分析了在体育运动竞赛中产生心理障碍的原因,提出了克服心理障碍的心理训练方法和手段,对提高竞赛水平具有一定的指导用。     

金属焊接质量的红外成像检测

介绍一种基于红外成像技术的金属焊接质量的无损检测方法.首先介绍了检测的基本原理和检测装置,然后详细给出了以边缘检测为基础的缺陷检测方法及检测结果.最后通过比较说明,利用红外成像技术对金属焊接质量进行无损检测是一种很有效的方法.     

中国竞技体育制度变迁的障碍性因素分析

本文着重从经济学角度对我国竞技体育制度变迁进行了深入地分析和探讨，找出了影响和制约我国竞技体育制度变迁的主要障碍性因素，为我国竞技体育的进一步发展提出合理而又切合实际的意见和建议。     

高等代数学习中思维障碍的研究

本文分析了学生在学习高等代数过程中存在的主要思维障碍。并针对这些问题提出了解决思维障碍的对策。     

RFID技术在图书馆的应用实例及障碍分析——以武汉图书馆为例

主要介绍了RFID技术在图书馆中的应用情况,并对操作过程中出现的种种问题进行分析。     

大学图书馆员专业发展的内涵、障碍与策略

从大学图书馆员专业发展的内涵入手,分析大学图书馆员专业发展进程中的障碍,探讨大学图书馆员专业发展的基本策略.     

A Framework for Policies and Practices to Improve Test Security Programs: Prevention,Detection, Investigation,and Resolution (PDIR)

Test security is not an end in itself; it is important because we want to be able to make valid interpretations from test scores. In this article, I propose a framework for comprehensive test security systems: prevention, detection, investigation, and resolution. The article discusses threats to test security, roles and responsibilities, rigorous training for everyone involved in testing, and an evaluation of current practices in test security. I call on everyone responsible for testing programs—the Association of Test Publishers, Council of Chief State School Officers, National Council on Measurement in Education, U.S. Department of Education, and state assessment program managers, their vendors, and the research community—to collaborate on guidelines and practices for security violation prevention, detection, investigation, and resolution.     

低重复率稿件中的学术不端行为检测与防范

重复率低却存在抄袭的稿件,其原因可能为单一的检测系统存在漏洞,新发表的论文上传数据库存在时间差,作者对稿件的有意识“修饰”,以及网络时代造假手段多样化.为此,文中提出以下措施:使用多种数据库进行文字检测,从查重报告中发现问题,建立有效的审稿专家数据库、网站教育和警示,充分利用网络资源,加快稿件处理进程,增强编辑的责任意识等,以利于更好地防范学术不端行为.