首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1207篇
  免费   24篇
  国内免费   12篇
教育   782篇
科学研究   220篇
各国文化   23篇
体育   100篇
综合类   5篇
文化理论   6篇
信息传播   107篇
  2023年   8篇
  2022年   10篇
  2021年   26篇
  2020年   30篇
  2019年   41篇
  2018年   47篇
  2017年   72篇
  2016年   44篇
  2015年   36篇
  2014年   48篇
  2013年   176篇
  2012年   47篇
  2011年   47篇
  2010年   50篇
  2009年   37篇
  2008年   44篇
  2007年   38篇
  2006年   29篇
  2005年   33篇
  2004年   19篇
  2003年   25篇
  2002年   25篇
  2001年   26篇
  2000年   24篇
  1999年   27篇
  1998年   4篇
  1997年   6篇
  1996年   12篇
  1995年   11篇
  1994年   8篇
  1992年   12篇
  1991年   13篇
  1990年   7篇
  1989年   5篇
  1987年   10篇
  1986年   8篇
  1985年   17篇
  1984年   12篇
  1983年   12篇
  1982年   10篇
  1981年   5篇
  1980年   7篇
  1979年   5篇
  1978年   7篇
  1977年   4篇
  1975年   10篇
  1974年   6篇
  1973年   7篇
  1971年   7篇
  1970年   4篇
排序方式: 共有1243条查询结果,搜索用时 15 毫秒
961.
962.
This multiple case study aims to analyze education and living conditions of Romany students, their families, and their relation with the school. The study consists of three schools in ?zmir, where mostly Romany students are educated. Study group consists of fifteen participants in total, three school staff, one student from the secondary level and one parent from each school chosen by criterion sampling. Semi-structured interviews, observation notes, and documents are utilized in the study. Lives of the Romany which have turned into cultural destiny, how students reproduce the lives of their families and the role of school in this reproduction are revealed.  相似文献   
963.
964.
This study compared the responses of two priming exercises of similar fatigue on the adjustment of the oxygen uptake time constant (τV?O2) in cycling. Ten healthy young adults (25 ± 3 yr) performed: three step transitions from a 20-W baseline to the power output (PO) below the gas exchange threshold (MOD, MODPRE); a 3-min bout (P3MIN) at 90% of peak PO (POpeak), followed by MOD (MOD3MIN); and a 6-min bout (P6MIN) at 80% of POpeak, followed by MOD (MOD6MIN). The O2 supply-to-O2 demand ([HHb]/V?O2) ratio was calculated for MODPRE, MOD3MIN, and MOD6MIN. Neuromuscular fatigue was measured isometrically pre- and post-priming exercise. Reductions in maximal voluntary contraction (?29 ± 6 vs ?34 ± 7%) and high-frequency doublet amplitude (?48 ± 13 vs ?43 ± 11%) were not significantly different between P3MIN vs P6MIN, suggesting similar fatigue. τV?O2 for MOD3MIN and MOD6MIN were similar, being ~25% smaller than MODPRE. The [HHb]/V?O2 ratio was significantly greater in MODPRE (1.13 ± 0.12) compared to MOD3MIN (1.02 ± 0.04) and MOD6MIN (1.02 ± 0.04). This study showed that priming exercise of shorter duration and higher intensity, was sufficient to accelerate V?O2 kinetics similarly to that observed subsequent to P6MIN when the muscle fatigue was similar.  相似文献   
965.
Current study is conducted to evaluate method verification of two locally available kits manufactured by DSI & BIORAD for quantitative estimation of Hepatitis B virus antibodies in human normal immunoglobulin by using International standard of National Institute of Biological Standards and Control. Four analyst perform five sets of test in duplicate analysing accuracy, precision, and limit of detection, sensitivity and specificity. Our results suggest that both DSI and BIORAD kits fulfil the validation criteria and are sensitive to detect up to 10 mIU concentration precisely and accurately. DSI kit is more precise at concentration 100 mIU and economically 4–5 times cheaper in local market; on the other hand, BIORAD kits provide larger detection range up to 1000 mIU.  相似文献   
966.
文章以ocLc的“学术科研信息工作框架模型”为基本研究框架,采用问卷调查收集129份问卷资料,并深入访谈12位研究人员,对数字信息环境下学术科研人员在科研过程中的科研信息行为(信息查找、存取、组织、阅读利用、写作和学术成果分享等活动和行为)和需求的特点与现状展开调研和分析,以期为科学定位个人科研信息空间的功能框架和探索研究图书馆资源建设和服务提供实证指导依据。  相似文献   
967.
Despite the accepted need for strategic alignment in the manufacturing strategy literature, there has been relatively little research aimed at simultaneously aligning decisions in the structural and infrastructural areas with the competitive priorities of an organization. This article attempts to bridge the gap by examining how work force management practices, an infrastructural decision, should be aligned with both the process technology of a manufacturing plant, a structural decision, and its competitive priorities. A conceptual model for linking competitive priorities, process technologies, and work force management practices is presented, and specific and testable propositions are developed for future empirical research. The proposed conceptual model is based on the premise that the process of matching work force management practices to competitive priorities involves identification of the key managerial tasks underlying various competitive priorities. These tasks, in turn, are matched with the process technology characteristics and work force management practices to seek a good fit, which is expected to improve manufacturing performance.  相似文献   
968.
Shoe manufacturers launch running shoes with increased (e.g., maximalists) or decreased (e.g., minimalists) midsole thickness and claim that they may prevent running injury. Previous studies tested footwear models with different midsole thicknesses on the market but the shoe construct was not strictly comparable. Therefore, in the present study, we examined the effect of midsole thickness, from 1-mm to 29-mm, in a standard test shoe prototype on the vertical loading rates, footstrike angle and temporal spatial parameters in distance runners. Fifteen male habitual rearfoot strikers were recruited from local running clubs. They were asked to run on an instrumented treadmill in shoes with different midsole thicknesses. We found significant interactions between midsole thickness with vertical loading rates (< 0.001), footstrike angle (= 0.013), contact time (< 0.001), cadence (= 0.003), and stride length (= 0.004). Specifically, shoes with thinner midsole (1- and 5-mm) significantly increased the vertical loading rates and shortened the contact time, when compared with thicker midsole shoes (25- and 29-mm). However, we did not observe any substantial differences in the footstrike angle, cadence and stride length between other shod conditions. The present study provides biomechanical data regarding the relationship between full spectrum midsole thicknesses and running biomechanics in a group of rearfoot strikers.  相似文献   
969.
The May Fourth Movement is most often understood as a precursor to the China that emerged under the rule of Mao Zedong and the Chinese Communist Party. In this essay, Mizoguchi presents an alternative reading of May Fourth, one envisioned by Liang Shuming as more deeply rooted in Chinese tradition than the heavily Marxian, class-based May Fourth later positioned as the forebear of the Cultural Revolution.  相似文献   
970.
Why is the period from the Opium War through the Republican era in recent Chinese history treated by so many scholars of different stripes as a decline of China itself, rather than as a decline simply of the dynastic order? What is the nature of the Republican period? What role has the centralization and decentralization of power played through these years – and is it limited to the Republican period, or is it part of a much longer trend in Chinese history? Why have so many scholars fixated on the Opium War at the beginning of Chinese modernity? Mizoguchi asks these penetrating questions and makes telling comparisons with Japan over roughly the same period of time.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号