基于混凝土裂缝分形性质的结构老化评价方法

采用分形理论分析了混凝土裂缝的分布特征，实例计算表明，裂缝的分布具有分形的统计自相似性，其分布分堆数能很好地表征裂缝的发育程度，且它与结构老化的其它指标能相互印证；因此，裂缝分布分堆数可以作为衡量结构老化程度的一个有效指标，     

在ASP网页中访问Excel文件

简要分析了ActiveX控件在ASP中的应用，将Excel中的数据信息在intemet上直观、形象的显示出来。     

王易修辞学的科学性诉求

王易是中国现代修辞学的奠基者 ,其修辞学著作的出版”标志着修辞学独立而完整的体系的正式出现”。王氏修辞研究的最鲜明特色就是注重科学性。王著运用科学的方法 ,将所研究的对象划分出层次 ,揭示了修辞活动的实践性特点 ,揭示了修辞对语言交际的扩张功能 ,揭示了修辞活动中的辩证规律。     

网络数据库访问技术探秘

孝令的网络信息系统从实质来看是一个以数据库为基础，基于Internet的信息交互系统．本文分析了多种Web数据库的访问技术，由一个身份认证的实例描述了ASP访问动态数据库的技术．     

激发学生主动式学习的课堂情境创设

结合初中自然科学教学实践，对激发学生主动式学习的课堂情境的导入方法、课堂内容的组织、课堂氛围的烘托，以及课堂情境中学生的直觉顿悟和开放式思维的培养等方面进行了探讨．     

谈大学英语教学中"主动性学习"及应用

本文主要针对在大学英语教学过程当中传统教学的一些弊端 ,通过“主动性学习”与传统教学及趣味教学作比较 ,揭示学生学习兴趣的根本来源 ,探讨了“主动性学习”重要性和如何在英语教学当中激励学生进行“主动性学习”     

碳酸氢铵法制备活性氧化锌的理论研究

研究了用碳酸氢铵法由次氧化锌制备活性氧化锌的热力学，中间体碱式碳酸锌的主要组成，碱式碳酸锌热分解的温度及形貌。     

Promoting active student learning in strength of materials with the aid of CAI

The objective of this paper is to discuss how active student learning is possible with the aid of a CAI package for a subject such as Strength of Materials. Multimedia is the latest innovation that can be utilized to improve learning. In this study, multimedia components such as hypertext, sound, graphics, video, and animation are implemented in a CAI package. These capabilities can capture students' attention, and can also illustrate the application of knowledge to real world problems more effectively than traditional teaching methods. The other features of this package include guided examples, theory, and application tests. Guided examples show the students problem solving techniques, and provide feedback according to their responses. The theory and application tests enable the teacher to gauge the students' understanding of the subject matter. Students who do well in the theory test are eligible to attempt the application test, which poses real-world engineering problems. The lesson that can be concluded from this study is that students' problem solving skills can be improved with the aid of CAI which emphasizes anchored instructions. However, to achieve maximum benefit, students also need to possess independent learning skills.     

My Journey With Annemarie Roeper: Lessons Learned Along the Way

For over 70 years Annemarie Roeper was able to breathe new life into many aspects of giftedness and gifted education. Capturing the magic of such a charismatic and visionary leader is a challenge. However, stories and storytelling provide a pathway into the narrative of Annemarie’s life as it evolved from young adulthood to elderhood. This article provides the lessons learned during a long-standing friendship and insights into her multidimensional personality.     

Study on the distribution of active centers in novel low Ti-loading MgCl2-supported Ziegler-Natta catalyst

Novel MgCl2-supported Ziegler-Natta (Z-N) catalysts prepared using a new one-pot ball milling method caneffectively control the amounts of Ti-loading in the catalysts. Complex GPC data on polypropylene synthesized by thesenovel catalysts were analyzed using the method of fitting the molecular weight distribution (MWD) curves with a multipleFlory-Schulz function. It was found that multiple active centers exist in these novel catalysts. Detailed study of the effects ofthe Ti-loadings in the catalysts on the distribution of the active centers showed that the Ti-loadings in the novelMgCl2-supported Z-N catalysts might affect the proportion of each type of active centers; and might be the main factorresponsible for the effect of the Ti-loadings on the microstructure, the molecular weight and molecular weight distributionwidth of the resultant polymer, the catalytic activity and polymerization kinetics.