用数学建模竞赛的思想指导师范生毕业论文的写作

针对高等师范院校数学专业毕业论文的现状和存在的问题,阐述了毕业论文改革的必要性和可行性,提出了遵循数学建模竞赛的思想和方法来指导师范生毕业论文写作的新模式,并且给出了按照数学建模竞赛的思想和方法进行师范生毕业论文选题和撰写的建议。     

Reply to the Comments

First, I am pleased to note the broad area of agreement amongthe four of us. We concur fully that polls are useful, powerful,and play an important role in contemporary politics. My threeresponders also acknowledge the significance of alternativeways in which citizens can express their opinions and, furthermore,that public opinion is more diverse and nuanced than any dichotomoussplit between the pros and cons on a particular issue recordedat a particular time might suggest. Sir Robert chides me explicitly, and Gary Langer by implication,for failing     

Binary Interpolative Coding for Effective Index Compression

Information retrieval systems contain large volumes of text, and currently have typical sizes into the gigabyte range. Inverted indexes are one important method for providing search facilities into these collections, but unless compressed require a great deal of space. In this paper we introduce a new method for compressing inverted indexes that yields excellent compression, fast decoding, and exploits clustering—the tendency for words to appear relatively frequently in some parts of the collection and infrequently in others. We also describe two other quite separate applications for the same compression method: representing the MTF list positions generated by the Burrows-Wheeler Block Sorting transformation; and transmitting the codebook for semi-static block-based minimum-redundancy coding.     

中文本体三元组的单字索引与更新方法研究

以实现中文本体三元组的快速索引和更新为目的,首先分析中文本体的知识结构,并通过OWL建模语言将其内部的各种知识单元转换成关系三元组和属性三元组构成的知识网络;然后利用《通用规范汉字表》对体现实体间语义信息的关系三元组进行编码,形成主语前缀和宾语前缀索引表,同时对描述实体特征的属性三元组进行编码,形成主语前缀和主语后缀索引表;接下来详细论述关系和属性三元组的更新方法;最后选取多个本体文件对三元组的汉字索引和更新方法进行测试和分析.结果表明,单字索引能够有效地减少本体三元组的更新和检索时间.     

本体推理在知识检索中的应用

介绍本体在知识检索中的作用,对语义网规则语言（SWRL）和Protégé-OWL API的使用进行详细介绍,利用Protégé-OWL API和SWRL实现本体概念的推理操作。通过领域本体进行实验,对结果进行分析,为进一步应用提供参考。     

通向自由的艰难之路——我国开放存取的现状分析

目前,多数研究误将我国开放存取发展缓慢的原因归结为知识产权对开放存取的威胁、质量控制的制约、付费模式脱离实际等因素.实质上,政府、机构、期刊和研究者对开放存取的认知度过低才是问题的关键.基于问题的核心因素,我国开放存取的发展需要政府采取有效的措施加以引导、机构的认可与重视、学术期刊的积极参与、研究者的支持.     

Facilitating learning in large lecture classes: testing the "teaching team" approach to peer learning

We tested the effect of voluntary peer-facilitated study groups on student learning in large introductory biology lecture classes. The peer facilitators (preceptors) were trained as part of a Teaching Team (faculty, graduate assistants, and preceptors) by faculty and Learning Center staff. Each preceptor offered one weekly study group to all students in the class. All individual study groups were similar in that they applied active-learning strategies to the class material, but they differed in the actual topics or questions discussed, which were chosen by the individual study groups. Study group participation was correlated with reduced failing grades and course dropout rates in both semesters, and participants scored better on the final exam and earned higher course grades than nonparticipants. In the spring semester the higher scores were clearly due to a significant study group effect beyond ability (grade point average). In contrast, the fall study groups had a small but nonsignificant effect after accounting for student ability. We discuss the differences between the two semesters and offer suggestions on how to implement teaching teams to optimize learning outcomes, including student feedback on study groups.     

Evaluating students’ perceptions and attitudes toward computer-mediated project-based learning environment: A case study

This research investigated 68 secondary school students’ perceptions of their computer-mediated project-based learning environment and their attitudes towards Project Work (PW) using two instruments—Project Work Classroom Learning Environment Questionnaire (PWCLEQ) and Project Work Related Attitudes Instrument (PWRAI). In this project-based learning environment, students experienced a face-to-face classroom setting and e-learning by using a synchronous computer-mediated communication (CMC) tool called ‘iCollaborate’ for online communication and project collaboration with peers from other countries. The PWCLEQ and PWRAI instruments were used to evaluate the computer-mediated project-based learning environment using students’ perceptions of the learning environment and to further investigate how their perceptions might affect their attitudes towards PW lessons. Students perceived the computer-mediated project-based learning environment favourably but they preferred to experience more Material Environment and more Open-Endedness and Social Presence. Simple correlation analysis revealed that all environment dimensions were significantly and positively related to the students’ attitudes towards PW, while multiple regression analysis indicated that two scales, Instructor Support and Social Presence, were the strongest predictors of attitudes towards PW lessons.     

我国农民体育消费的现状与对策研究

体育消费已成为我国拉动内需、活跃市场、繁荣经济、拓宽就业渠道的一支坚挺力量。研究约占全国人口总数70%农民的体育消费状况将对我国整体经济发展和社会主义新农村建设有着重要的划时代的历史意义。通过对我国发达与欠发达地区农民体育消费现状进行了调查和分析,并提出对策与建议,旨在落实＂农民体育健身工程＂,推动农村体育市场的建立与发展,改变农民的消费意识,拉动新农村经济的增长,促进社会主义新农村建设。