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1.
Inverted Index Compression Using Word-Aligned Binary Codes 总被引：3，自引：1，他引：3
We examine index representation techniques for document-based inverted files, and present a mechanism for compressing them using word-aligned binary codes. The new approach allows extremely fast decoding of inverted lists during query processing, while providing compression rates better than other high-throughput representations. Results are given for several large text collections in support of these claims, both for compression effectiveness and query efficiency. 相似文献
2.
竞技体育快速发展,运动员为了取得优异的比赛成绩要长期承受大运动量、高负荷的训练。运动员训练过程中产生的疲劳现象主要与成就感的降低、情绪/体力耗竭和对运动的负评价程度相关。改善运动员心理承受能力和应变能力,减轻心理负担,根据个体运动潜力进行针对性训练,科学安排训练量、训练强度和训练时间等可以提高训练效率。 相似文献
3.
Robinson Clinton Vũ Tú Anh Thị 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2019,65(3):443-470
International Review of Education - In the multilingual environments of Africa, national literacy policies vary in terms of the attention they give to the roles and purposes of local, national and... 相似文献
4.
The article reviews the social-educational theorization of the early Soviet psychologist L. S. Vygotsky (1896–1934) in the light of the impact of communicative globalization in educational practice. Vygotsky proposed four “genetic domains” for investigating higher cognitive processes: the phylogenetic (humans undergoing natural evolution), the cultural-historical (social activity of humans), the ontogenetic (individual lifespan), and the microgenetic (immediate events). Vygotskian sociocultural theory is widely used in educational research, especially Vygotsky’s notion of mediated development via tools and signs. Since Vygotsky, communicative globalization has transformed educational potentials. Nevertheless, provided adjustments are made to Vygotsky’s genetic method to incorporate time-space compression, the mutual presence of the genetic domains, and the glonacal heuristic, Vygotskian theory continues to be useful in socially-situated investigations of educational development and transformation, and opens another way into the global, for example investigation of the role of global mediation in learning. 相似文献
5.
Grisham W Schottler NA McCauley LM Pham AP Ruiz ML Fong MC Cui X 《CBE life sciences education》2011,10(2):222-230
Zebra finch song behavior is sexually dimorphic: males sing and females do not. The neural system underlying this behavior is sexually dimorphic, and this sex difference is easy to quantify. During development, the zebra finch song system can be altered by steroid hormones, specifically estradiol, which actually masculinizes it. Because of the ease of quantification and experimental manipulation, the zebra finch song system has great potential for use in undergraduate labs. Unfortunately, the underlying costs prohibit use of this system in undergraduate labs. Further, the time required to perform a developmental study renders such undertakings unrealistic within a single academic term. We have overcome these barriers by creating digital tools, including an image library of song nuclei from zebra finch brains. Students using this library replicate and extend a published experiment examining the dose of estradiol required to masculinize the female zebra finch brain. We have used this library for several terms, and students not only obtain significant experimental results but also make gains in understanding content, experimental controls, and inferential statistics (analysis of variance and post hoc tests). We have provided free access to these digital tools at the following website: http://mdcune.psych.ucla.edu/modules/birdsong. 相似文献
6.
邱团 《沈阳体育学院学报》2011,30(2)
广西作为中国对接东盟的"桥头堡",已经成功主办了中国-东盟系列体育赛事,产生了较好的社会、经济等综合效益,但目前还缺乏知名赛事品牌,而体育赛事的品牌又关系到一个体育赛事的前途与发展,关系到运动水平的提高和体育事业市场化产业化的发展等.因此,就借鉴国外相关赛事品牌开发的经验,结合广西主办中国-东盟体育赛事的现状,提出广西开发中国-东盟体育赛事知名品牌的建议. 相似文献
7.
Hoang Loc Phuoc Le Hieu Thanh Van Tran Hung Phan Thanh Chi Vo Duc Minh Le Phuong Anh Nguyen Dung The Pong-inwong Chakrit 《Education and Information Technologies》2022,27(3):4007-4035
Education and Information Technologies - Peer assessment has an important role in teaching and learning nowadays. However, the existing techniques tend to be limited due to a lack of a suitable... 相似文献
8.
Comprehension tests often compare accuracy on inferential versus literal questions and find inferential harder than literal, and poor comprehenders performing worse than controls. Difficulties in integration are assumed to be the reason. This research explores another reason—differences in memory for the passage information underlying the questions. Thirty-nine poor comprehenders and 39 controls were given multiple-paragraph passages, which they retold before answering questions. Retellings permitted assessing question accuracy as a function of memory for the text underlying each question. Inferential accuracy was poorer than literal, and the expected group effect was obtained. However, when text memory was perfect, group differences disappeared, indicating that poor comprehenders can generate inferences as well as controls, if they have the relevant information in memory. These findings show that text memory is crucial in distinguishing poor comprehension. 相似文献
9.
The teaching and assessment of essay writing at primary schools throughout Vietnam is regulated by the Ministry of Education
and Training. The analytical error-recognition method of assessment, however, does not facilitate direct interpretation of
students’ writing competence. In this study, which involved samples of Grade 5 students in five provinces in Vietnam, a combination
of traditional and partial credit scoring rubrics was developed to enable data analysis using the Rasch model. Based on such
analysis, a continuum of writing ability at Grade 5 level was identified and a mastery level defined in terms of writing skills.
The study has implications for possible changes in future assessment and marking schemes. 相似文献
10.
Hsiao-Lin Tuan Chung-Chieh Yu Chi-Chin Chin 《International Journal of Science and Mathematics Education》2017,15(8):1385-1401
The purposes of this study are to report the influences of a mixed delivery professional development [PD] course involving face-to-face classes and the mentoring assisted inquiry-based teaching [MAIT] website that addressed the conceptual change and self-efficacy of high school mathematics and science teachers’ conceptions of inquiry-based teaching. Twenty-five in-service high school science and mathematics teachers participated in a 9 weeks, 4 h per week PD course. Data collection included the pre-post Inquiry Teaching Efficacy Questionnaire [ITEQ], teachers’ reflective journals posted on the MAIT website, teachers’ assignments requested by the course instructor, and follow-up teachers’ interviews. Findings revealed that both mathematics and science teachers’ conceptions of inquiry teaching show significant improvements after the course. The mixed delivery PD course had the same influence on science and mathematics teachers. The authentic video clips and lesson plans provided on the MAIT website and the specific feedback toward teachers’ performance are the main factors that shaped teachers’ inquiry-based teaching conceptions. 相似文献