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排序方式: 共有1645条查询结果,搜索用时 15 毫秒
981.
Christopher Lee Meghann Weldon 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2019,28(5):175-182
AbstractIn July 2017 the California State University system of twenty-four libraries started an unmediated interlibrary loan service for print materials, known as CSU+. This paper examines four years of interlibrary loan data, from two years before CSU+’s launch to two years after, to explore the impact of the new service on interlibrary loan usage. The data shows that CSU?+?dramatically increased interlibrary loan use across the California State University system. 相似文献
982.
AbstractThe researchers extracted a disproportionate stratified random sample from 40?years of thesis bibliographic records at Concordia University in Montreal, Quebec. Match rates for thesis authors in the LC/NACO Name Authority File and in Canadiana Authorities were examined. ProQuest digitization of older theses, the creation of an institutional repository, the move to electronic theses and dissertations in 2011, and the implementation of vendor-assisted authority control in 2017 impacted bibliographic records. In addition to the dearth of matches in general, results uncovered false matches and significant changes to Library and Archives Canada thesis authority control practices over the years. 相似文献
983.
Christopher J. Harris Joseph S. Krajcik James W. Pellegrino Angela Haydel DeBarger 《Educational Measurement》2019,38(2):53-67
Contemporary views on learning highlight that deep learning occurs not simply by accumulating knowledge, but by using and applying knowledge as one engages in disciplinary activity. Increasingly, those concerned with education policy and practice are shifting priorities toward supporting deeper learning by emphasizing the importance of students’ ability to apply knowledge in subject areas. Designers of student assessments are following suit and are taking on the challenge of creating a new generation of assessments. We present a principled approach for designing classroom‐based assessments that not only assess deeper learning, but also provide teachers with critical information about how students are progressing toward achieving ambitious new learning goals. Our approach follows the evidentiary reasoning of evidence‐centered design and builds on research about the important role of knowledge‐in‐use to support student learning. We illustrate our approach in the context of creating tasks that assess students' science proficiency as reflected in the Next Generation Science Standards that are gaining prominence in the United States. 相似文献
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985.
AbstractIn this paper, we consider the football statues of China, whose football team has dramatically underperformed relative to its population size and economic power. Although China lacks a participative grassroots football culture and has struggled to establish a credible domestic league, recent government intervention and investment has seen football’s profile rise dramatically. China’s many football statues are largely atypical in comparison to the rest of the world, including their depiction of anonymous figures rather than national or local heroes, the incorporation of tackling scenes in their designs, and their location at training camps. Through four specific examples and reference to a global database, we illustrate how these statues reflect the tensions and difficulties inherent in China’s desire to integrate itself into global football, and achieve its stated goal of hosting and winning the FIFA World Cup, whilst simultaneously upholding national, cultural and political values such as the primacy of hard work and learning, and saving face in defeat. 相似文献
986.
James Christopher Westland Jian Mou Dafei Yin 《Information processing & management》2019,56(4):1592-1604
Consumers often display unique habitual behaviors, and knowledge of these behaviors is of great value in prediction of future demand. We investigated consumer behavior in bicycle sharing in Beijing, where demand prediction is critical for cost-effective rebalancing of bicycle locations (putting bikes where and when they will be rented) and supply (number of bicycles). We created baseline statistical demand models, borrowing methods from economics, signal processing and animal tracking to find consumption cycles of 7, 12, 24 h and 7-days. Lorenz curves of bicycle demand revealed significant stratification of consumer behavior and a long-tail of infrequent demand. To overcome the limits of traditional statistical models, we developed a deep-learning model to incorporate (1) weather and air quality, (2) time-series of demand, and (3) geographical location of demand. Customer segmentation was added at a later stage, to explore potential for improvement with customer demographics. Our final machine learning model with tuned hyperparameters yielded around 50% improvement in predictions over a discrete wavelet transform model, and 80–90% improvement in predictions over a naïve model the reflects some current industry practice. We assessed causality in the deep-learning model, finding that location and air quality had the strongest causal impact on demand. The extreme market segmentation of customer demand, and our relatively short time span of data combined to make it difficult to find sufficient data on all customers for a model fit based on segmentation. We reduced our model data to only the 10 most frequent to see whether such segmentation improves our model's predictive success. These results, though limited, suggest that customer behavior within market segments is more stable than across all customers, as was expected. 相似文献
987.
Madelyn H. Labella Angela J. Narayan Christopher M. McCormick Christopher D. Desjardins Ann S. Masten 《Child development》2019,90(1):227-244
A multimethod, multi-informant design was used to examine links among sociodemographic risk, family adversity, parenting quality, and child adjustment in families experiencing homelessness. Participants were 245 homeless parents (Mage = 31.0, 63.6% African American) and their 4- to 6-year-old children (48.6% male). Path analyses revealed unique associations by risk domain: Higher sociodemographic risk predicted more externalizing behavior and poorer teacher–child relationships, whereas higher family adversity predicted more internalizing behavior. Parenting quality was positively associated with peer acceptance and buffered effects of family adversity on internalizing symptoms, consistent with a protective effect. Parenting quality was associated with lower externalizing behavior only when sociodemographic risk was below the sample mean. Implications for research and practice are discussed. 相似文献
988.
989.
990.
Christopher P. Brown 《Teachers and Teaching》2013,19(8):1026-1044
Background: Policymakers’ use of high-stakes exams to improve students’ academic achievement affects teachers and their tenure in the field at all levels of schooling. Novice teachers now being inducted into the field have been educated almost exclusively in these high-stakes learning environments. Yet, how their familiarity with these contexts combined with their experiences in their own classrooms affect novices’ induction into the field of teaching has not been fully examined. Aim: This article presents findings from an investigation into the experiences of two first-year teachers who were educated and trained to be teachers in the same high-stakes education system in which they taught. It examines how these first-year teachers viewed policymakers’ reforms affecting their teaching and tenure in the field. Methods: This qualitative case study centers on the experiences of two first-year teachers working in the same high-stakes standards-based accountability teaching context in which they were educated – the case. This study provides insight into the issue of how novices’ familiarity with high-stakes reform combined with their experiences in their own classrooms impacts their conceptions of their teaching and their tenure in the field. Outcomes: The findings from this case study reveal how policymakers’ high-stakes reforms impacted the development of these novice teachers in significant ways. Not only did they have to learn how to teach as they taught, but they also had to ensure they were teaching all of their students to pass the high-stakes exams. Their varied experiences also demonstrate how these high-stakes exams can ‘test’ beginning teachers out of the classroom. Conclusions: These findings demonstrate that first-year teachers’ familiarity with policymakers’ high-stakes reforms is not enough to prepare them for the expectation that they immediately improve students’ academic achievement on high-stakes exams. Such findings not only challenge what it means to be a educator in these contexts, but they also shed light on how larger political and economic forces impact the teaching and tenure of novices. To support new teachers, teacher educators and mentors should rethink the education and induction processes while helping novices understand as well as prepare for the role context plays in their teaching and development as professionals. 相似文献