全文获取类型
收费全文 | 898篇 |
免费 | 10篇 |
国内免费 | 1篇 |
专业分类
教育 | 690篇 |
科学研究 | 53篇 |
各国文化 | 12篇 |
体育 | 72篇 |
文化理论 | 5篇 |
信息传播 | 77篇 |
出版年
2023年 | 4篇 |
2022年 | 7篇 |
2021年 | 7篇 |
2020年 | 11篇 |
2019年 | 22篇 |
2018年 | 32篇 |
2017年 | 29篇 |
2016年 | 33篇 |
2015年 | 19篇 |
2014年 | 16篇 |
2013年 | 181篇 |
2012年 | 21篇 |
2011年 | 30篇 |
2010年 | 26篇 |
2009年 | 22篇 |
2008年 | 19篇 |
2007年 | 25篇 |
2006年 | 20篇 |
2005年 | 17篇 |
2004年 | 25篇 |
2003年 | 18篇 |
2002年 | 16篇 |
2001年 | 14篇 |
2000年 | 17篇 |
1999年 | 15篇 |
1998年 | 9篇 |
1997年 | 15篇 |
1996年 | 21篇 |
1995年 | 15篇 |
1994年 | 15篇 |
1993年 | 10篇 |
1992年 | 6篇 |
1991年 | 10篇 |
1989年 | 7篇 |
1988年 | 13篇 |
1987年 | 12篇 |
1986年 | 5篇 |
1985年 | 13篇 |
1984年 | 12篇 |
1983年 | 12篇 |
1982年 | 5篇 |
1981年 | 9篇 |
1980年 | 4篇 |
1979年 | 7篇 |
1978年 | 5篇 |
1977年 | 14篇 |
1976年 | 6篇 |
1975年 | 3篇 |
1972年 | 3篇 |
1857年 | 6篇 |
排序方式: 共有909条查询结果,搜索用时 15 毫秒
21.
Bill Ptacek 《Public Library Quarterly》2016,35(4):338-343
In this article, author Bill Ptacek says that the future is now, and, at least from the 1970s through today, in the field of early childhood work, the future has come so fast that it is constantly upon us. That reality means that those concerned about young children in libraries have been about adaptation on a continuing basis. In this world of rapid change, innovation is constant: City firefighters come to the libraries in uniform to read stories to children, library outreach specialists take programs to daycare centers in their communities, and staff members create a space in a library devoted to early childhood reading. This tradition of rapid change means that the early childhood staff of most large public libraries in North America is changing for the future on a regular basis. The work unit should be considered seriously as one model for 21st century public library reform. 相似文献
22.
Anthony W. Blanchfield Tammy M. Lewis-Jones James R. Wignall James B. Roberts 《European Journal of Sport Science》2018,18(9):1177-1184
The effectiveness of a nap as a recovery strategy for endurance exercise is unknown and therefore the present study investigated the effect of napping on endurance exercise performance. Eleven trained male runners completed this randomised crossover study. On two occasions, runners completed treadmill running for 30?min at 75% ?O2max in the morning, returning that evening to run for 20?min at 60% ?O2max, and then to exhaustion at 90% ?O2max. On one trial, runners had an afternoon nap approximately 90?min before the evening exercise (NAP) whilst on the other, runners did not (CON). All runners napped (20?±?10?min), but time to exhaustion (TTE) was not improved in all runners (NAP 596?±?148?s vs. CON 589?±?216?s, P?=?.83). Runners that improved TTE after the nap slept less at night than those that did not improve TTE (night-time sleep 6.4?±?0.7?h vs. 7.5?±?0.4?h, P?.01). Furthermore, night-time sleep predicted change in TTE, indicating that runners sleeping least at night improved TTE the most after the nap compared to CON (r2 ? =??0.76, P?=?.001). In runners that improved TTE, ratings of perceived exertion (RPE) were lower during the TTE on NAP than CON compared to runners that did not improve (?0.4?±?0.6 vs. 0?±?0, P?=?.05). Reduced exercising sense of effort (RPE) may account for the improved TTE after the nap. In conclusion, a short afternoon nap improves endurance performance in runners that obtain less than 7?h night-time sleep. 相似文献
23.
24.
Salmanzadeh A Kittur H Sano MB C Roberts P Schmelz EM Davalos RV 《Biomicrofluidics》2012,6(2):24104-2410413
Ovarian cancer is the leading cause of death from gynecological malignancies in women. The primary challenge is the detection of the cancer at an early stage, since this drastically increases the survival rate. In this study we investigated the dielectrophoretic responses of progressive stages of mouse ovarian surface epithelial (MOSE) cells, as well as mouse fibroblast and macrophage cell lines, utilizing contactless dielectrophoresis (cDEP). cDEP is a relatively new cell manipulation technique that has addressed some of the challenges of conventional dielectrophoretic methods. To evaluate our microfluidic device performance, we computationally studied the effects of altering various geometrical parameters, such as the size and arrangement of insulating structures, on dielectrophoretic and drag forces. We found that the trapping voltage of MOSE cells increases as the cells progress from a non-tumorigenic, benign cell to a tumorigenic, malignant phenotype. Additionally, all MOSE cells display unique behavior compared to fibroblasts and macrophages, representing normal and inflammatory cells found in the peritoneal fluid. Based on these findings, we predict that cDEP can be utilized for isolation of ovarian cancer cells from peritoneal fluid as an early cancer detection tool. 相似文献
25.
26.
Graphic elicitation, i.e. asking participants to draw, is an interview technique used to focus the interviewee on the given topic or gain extra meaning not covered verbally as part of the interview. This study analyses two interview contexts which included visual elicitation. It describes a successful example in which the researcher maintained control over the mode of the planned research task (diagram) as well as another example in which slippage occurred between the mode of the planned research task (drawing) and the resulting artefact (diagram). Through this analysis, strategies for maintaining researcher control over the mode of elicitation are identified, increasing our understanding about the theory and practice of both drawings and diagrams as two different modes of visual elicitation. The paper concludes that the required control does not necessarily comprise an increase in task structure (directing participants as to how to draw). Moreover, the subject and purpose of the task are equally important. Successful researcher control then comprises a careful balance between all the three aspects of purpose, structure and subject. 相似文献
27.
In recent years, the Standards for Qualified Teacher Status in England have placed new emphasis on student‐teachers' ability to become integrated into the ‘corporate life of the school’ and to work with other professionals. Little research, however, has been carried out into how student‐teachers perceive the social processes and interactions that are central to such integration during their initial teacher education school placements. This study aims to shed light on these perceptions. The data, gathered from 23 student‐teachers through interviews and reflective writing, illustrate the extent to which the participants perceived such social processes as supporting or obstructing their development as teachers. Signals of inclusion, the degree of match or mismatch in students' and school colleagues' role expectations, and the social awareness of both school and student‐teacher emerged as crucial factors in this respect. The student‐teachers' accounts show their social interactions with school staff to be meaningful in developing their ‘teacher self’ and to be profoundly emotionally charged. The implications for mentor and student‐teacher role preparation are discussed in this article. 相似文献
28.
The aim of this paper is to propose information literacy as a soft applied discipline, of key importance in the information society. This is contrasted with the characterization of information literacy as a personal attribute in the U.S. and Australian Information Literacy standards. Vannevar Bush's vision of the technologically connected and enabled scientist is used to introduce a discussion of citizen's information needs and responsibilities in an age of “cheap complex devices.” The authors emphasize the key role of information literacy in this information society. Information literacy is identified as a soft applied discipline, with reference to disciplinary indicators that have been identified in the literature. Building on this concept of an information literacy discipline, the authors propose a mission for information literacy education focused around three elements: information literacy for citizenship, information literacy for economic growth, and information literacy for employability. The paper concludes by identifying that in terms of preparing citizens for managing and taking action in society, information literacy has much to contribute, and that it is vital to nurture this emergent discipline. 相似文献
29.
Linda Musser Elizabeth Roberts 《Library Collections, Acquisitions, and Technical Services》2007,31(3-4):220-225
This study examined the occurrence of color in dissertations and theses produced at the Pennsylvania State University over a nine year period. Since the most common preservation method for dissertations and theses is monochromatic microfilming, traditional treatment may result in a loss of information encoded in color in these resources. Results indicate a significant increase in the use of color over the time period studied. Variations in the amount of color use by discipline were also observed. Implications related to monochromatic microfilming and recommendations for long term preservation are discussed. 相似文献
30.