排序方式： 共有61条查询结果，搜索用时 15 毫秒
41.
ABSTRACT: The Univ. of Maine is participating in the National Science Foundation's (NSF) GK-12 Teaching Fellows program. Between 2000 and 2003, 4 food science graduate students demonstrated food- and nutrition-related science lessons, among other innovative activities. This article includes details of an activity on natural dyes to help students understand plant pigments. Assessment of the NSF GK-12 program is ongoing both locally and nationally. NSF's goals are being met, including one of the most important, which is the effect of NSF Fellows as role models on K-12 students. 相似文献
42.
Wichor Matthijs Bramer 《Journal of the Medical Library Association》2016,104(2):143-145
Objective
Google Scholar is often used to search for medical literature. Numbers of results reported by Google Scholar outperform the numbers reported by traditional databases. How reliable are these numbers? Why are often not all available 1,000 references shown?Methods
For several complex search strategies used in systematic review projects, the number of citations and the total number of versions were calculated. Several search strategies were followed over a two-year period, registering fluctuations in reported search results.Results
Changes in numbers of reported search results varied enormously between search strategies and dates. Theories for calculations of the reported and shown number of hits were not proved.Conclusions
The number of hits reported in Google Scholar is an unreliable measure. Therefore, its repeatability is problematic, at least when equal results are needed. 相似文献43.
董正松 《贵州教育学院学报》2002,18(5):93-94
初三思想政治课教学中，可运用教材中的插图、图案、图表等结合学生的实际，巧妙地运用形象思维，激发学生的兴趣，从而取得预期的教学效果。 相似文献
44.
潘春兰 《天津成人高等学校联合学报》2005,7(5):76-77,96
研究性学习是学生在教师指导下，从自然、社会和生活中选择和确定专题研究，并在研究过程中主动地获取知识、应用知识、解决问题的学习活动。利用研究性学习进行模具概论课程专题研究，可以弥补模具课程设计这一环节。使学生学习的知识有一个完整性、系统性，能在工作中解决一些较简单的设计问题。 相似文献
45.
李永 《中国教育发展研究杂志》2007,4(4):75-76
在信息化社会的今天，加快普及信息技术教育，提高信息技术课程的效益，对实现教育信息化，全面推进素质教育具有重要意义。 相似文献
46.
随着学校师资管理体制改革的不断深入,激励机制也逐渐被引入学校管理工作中。本文从“双因素理论”出发,就激励理论在高校管理中的运用提出了一些看法,以激发教师的内在动力,调动教师的工作积极性,提高学校管理效益。 相似文献
47.
48.
涂加乐 《军事体育进修学院学报》2009,28(2):126-128
随着科技的发展和时代的进步,在现代奥运会赛场上,成绩信息的记录方法越来越先进。与此同时,成绩的发布也越来越迅速、多样和准确。成绩信息主要包括运动员名单、比赛日程、比赛成绩、技术统计和排名情况等。其发布的方式多种多样,包括打印分发、INFO2008、评论员系统、电子显示屏、电视转播等. 相似文献
49.
The problem of results merging in distributed information retrieval environments has gained significant attention the last years. Two generic approaches have been introduced in research. The first approach aims at estimating the relevance of the documents returned from the remote collections through ad hoc methodologies (such as weighted score merging, regression etc.) while the other is based on downloading all the documents locally, completely or partially, in order to calculate their relevance. Both approaches have advantages and disadvantages. Download methodologies are more effective but they pose a significant overhead on the process in terms of time and bandwidth. Approaches that rely solely on estimation on the other hand, usually depend on document relevance scores being reported by the remote collections in order to achieve maximum performance. In addition to that, regression algorithms, which have proved to be more effective than weighted scores merging algorithms, need a significant number of overlap documents in order to function effectively, practically requiring multiple interactions with the remote collections. The new algorithm that is introduced is based on adaptively downloading a limited, selected number of documents from the remote collections and estimating the relevance of the rest through regression methodologies. Thus it reconciles the above two approaches, combining their strengths, while minimizing their drawbacks, achieving the limited time and bandwidth overhead of the estimation approaches and the increased effectiveness of the download. The proposed algorithm is tested in a variety of settings and its performance is found to be significantly better than the former, while approximating that of the latter. 相似文献
50.
The paper presents a study investigating the effects of incorporating novelty detection in automatic text summarisation. Condensing a textual document, automatic text summarisation can reduce the need to refer to the source document. It also offers a means to deliver device-friendly content when accessing information in non-traditional environments. An effective method of summarisation could be to produce a summary that includes only novel information. However, a consequence of focusing exclusively on novel parts may result in a loss of context, which may have an impact on the correct interpretation of the summary, with respect to the source document. In this study we compare two strategies to produce summaries that incorporate novelty in different ways: a constant length summary, which contains only novel sentences, and an incremental summary, containing additional sentences that provide context. The aim is to establish whether a summary that contains only novel sentences provides sufficient basis to determine relevance of a document, or if indeed we need to include additional sentences to provide context. Findings from the study seem to suggest that there is only a minimal difference in performance for the tasks we set our users and that the presence of contextual information is not so important. However, for the case of mobile information access, a summary that contains only novel information does offer benefits, given bandwidth constraints. 相似文献