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对图书馆服务器的规划、配置、选型进行深入探讨，并详细介绍了4种服务器性能评估方法，在此基础上利用其中一种方法对温州市图书馆自动化系统的服务器需求进行TPCC计算，以此抛砖引玉，期望建立适应图书馆实际业务需求的TPC基准测试程序。 相似文献
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ABSTRACT As an important part of art and culture, ancient murals depict a variety of different artistic images, and these individual images have important research value. For research purposes, it is often important to first determine the type of objects represented in a painting. However, the mural painting environment makes datasets difficult to collect, and long-term exposure leads to underlying features that are not distinct, which makes this task challenging. This study proposes a convolutional neural network model based on the classic AlexNet network model and combines it with feature fusion to automatically classify ancient mural images. Due to the lack of large-scale mural datasets, the model first expands the dataset by applying image enhancement algorithms such as scaling, brightness conversion, noise addition, and flipping; then, it extracts the underlying features (such as fresco edges) shared by the first stage of a dual channel structure. Subsequently, a second-stage deep abstraction is conducted on the features extracted by the first stage using a two-channel network, each of which has a different structure. The obtained characteristics from both channels are merged, and a loss function is constructed to obtain the classification result. This approach improves the model's robustness and feature expression ability. The model achieves an accuracy of 84.24%, a recall rate of 84.15%, and an F1-measure of 84.13% when applied to a constructed mural image dataset. Compared with the AlexNet model and other improved convolutional neural network models, the proposed model improves each evaluation index by approximately 5%, verifying the rationality and effectiveness of the model for automatic mural image classification. The mural classification model proposed in this paper comprehensively considers the influences of network width and depth and can extract rich details from mural images from multiple local channels. An effective classification method could help researchers manage and protect mural images in an orderly fashion and quickly and effectively search for target images in a digital mural library based on a specified image category, aiding mural condition monitoring and restoration efforts as well as archaeological and art historical research. 相似文献
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[目的/意义]探讨学者关联数据集的定位及其构建方法,以期为学科发展、学者评价与信息共享利用提供便利。[方法/过程]在阐释现有机构知识库内涵基础上,分析学者关联数据集之功能特点,并以我国图书情报领域为例,通过开源软件D2R发布该领域学者的关联数据集。[结果/结论]学者关联数据集不同于机构知识库,它以所属学科领域的学者为数据起点,以网罗一切相关信息资源,并以完全开放、关联与共享的方式提供知识。在学者关联数据集的构建与发布过程中,重点需克服实体URI定义、作者重名、专著与网络学术记录难以采全等问题。 相似文献
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Considering the rising proportion of English learners (ELs) in general education, little is known about how this change in classroom composition relates to the frequency of instructional activities and skills. This study uses a multimodal perspective on learning mathematics in a multilingual context, which recognizes the diverse modes of communication that students draw on in mathematics classrooms. We examined national data using quantitative analyses and investigated the mathematics practices that were more likely to occur in kindergarten classrooms that did and did not have ELs. We found teachers reported greater frequency of manipulatives and count/calendar activities in mathematics instruction when there were EL students in the classroom. Teachers in classrooms with ELs also reported a greater frequency of mathematics content that involved teaching shapes and practical skills. The findings indicate that teachers tended towards a supportive multimodal approach to instruction when ELs were present. 相似文献
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国家精品课程网站建设的思考——基于英语语言类课程的调查分析 总被引：2，自引：0，他引：2
宗云 《中国远程教育(综合版)》2009,(10)
本文以2003-2008年共评选出的54门英语语言类国家精品课程为研究对象,从总体概况、课程模块建设、运行情况三方面对网站建设情况进行了详细分析.数据表明,网站整体建设质量有待改进,课程资源共享程度不够.作者在分析的基础上对国家精品课程网站建设提出了行之有效的建议. 相似文献
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Students' academic achievement is the result of the interplay between person-level and contextual factors (R. R: Greene, 2014; D. E. Hunt, 1975). Students perform better when classroom characteristics support their characteristics. The authors examine whether student perceptions of two classroom characteristics (care and control) fit with two Latino student characteristics (English language learner status and grit) in relation to their academic achievement. Using a sample of fourth- and fifth-grade Latino students from the Measures of Effective Teaching dataset (n = 3,272), the authors conducted a series of nested regression models with two- and three-way interactions between student characteristics and student perceptions of classroom characteristics. Findings revealed that grit is most strongly associated with Latino English language learners’ English/language arts achievement when students perceived that teachers used high levels of care and control. We conclude with implications for practitioners. 相似文献
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国家精品课程网上资源教学设计与开发的内容分析研究 总被引：3，自引：0，他引：3
本文从教育技术学视角依槲教学系统设计和开发理论,运用内容分析方法从教学维度、礼会维度、技术维度三个方面对2003-2006年124门国家精品课程网上资源的教学设计与开发现状进行分析,以期了解其设计与开发的优势与不足,为构建特色卡古品课程设计、开发模型等研究以及精品课程的建设、评价、共享、推广和应用奠定基础. 相似文献