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   243篇
  免费   8篇
教育   201篇
科学研究   22篇
各国文化   2篇
体育   1篇
综合类   1篇
文化理论   2篇
信息传播   22篇
  2023年   12篇
  2022年   7篇
  2021年   9篇
  2020年   13篇
  2019年   13篇
  2018年   14篇
  2017年   19篇
  2016年   15篇
  2015年   8篇
  2014年   19篇
  2013年   36篇
  2012年   9篇
  2011年   9篇
  2010年   7篇
  2009年   12篇
  2008年   7篇
  2007年   9篇
  2006年   7篇
  2005年   1篇
  2004年   1篇
  2002年   1篇
  2001年   1篇
  2000年   1篇
  1999年   1篇
  1997年   3篇
  1996年   1篇
  1995年   2篇
  1994年   2篇
  1992年   1篇
  1990年   1篇
  1987年   1篇
  1986年   1篇
  1985年   2篇
  1984年   3篇
  1983年   1篇
  1981年   1篇
  1980年   1篇
排序方式: 共有251条查询结果,搜索用时 93 毫秒
51.
52.
Solid oxide fuel cells(SOFCs) offer high energy conversion,low noise,low pollutant emission,and low processing cost.Despite many advantages,SOFCs face a major challenge in competing with other types of fuel cells because of their high operating temperature.The necessity to reduce the operational temperature of SOFCs has led to the development of research into the materials and fabrication technology of fuel cells.The use of composite cathodes significantly reduces the cathode polarization resistance and expands the triple phase boundary area available for oxygen reduction.Powder preparation and composite cathode fabrication also affect the overall performance of composite cathodes and fuel cells.Among many types of cathode materials,lanthanum-based materials such as lanthanum strontium cobalt ferrite(La1-xSrxCo1-yFeyO3- have recently been discovered to offer great compatibility with ceria-based electrolytes in performing as composite cathode materials for intermediate-to low-temperature SOFCs(IT-LTSOFCs).This paper reviews various ceria-based composite cathodes for IT-LTSOFCs and focuses on the aspects of progress and challenges in materials technology.  相似文献   
53.
Measuring the quality of service in higher education is increasingly important, particularly as fees introduce a more consumerist ethic amongst students. This paper aims to test and compare the relative efficacy of three measuring instruments of service quality (namely HEdPERF, SERVPERF and the moderating scale of HEdPERF‐SERVPERF) within a higher education setting. The objective was to determine which instrument had the superior measuring capability in terms of unidimensionality, reliability, validity and explained variance. Tests were conducted utilizing a sample of higher education students, and the findings indicated that HEdPERF scale resulted in more reliable estimations, greater criterion and construct validity, greater explained variance, and consequently was a better fit than the other two instruments. Consequently, a modified five‐factor structure of HEdPERF is put forward as the more superior scale for the higher education sector.  相似文献   
54.
ABSTRACT

Students in senior pre-university education encounter difficulties in the application of mathematics into physics. This paper presents the outcome of an explorative qualitative study of teachers’ beliefs about improving the transfer of algebraic skills from mathematics into physics. We interviewed 10 mathematics and 10 physics teachers using a semi-structured questionnaire that was based on an algebraic transfer problem. Almost all teachers acknowledged this transfer problem and considered it to be important. We found a continuum of teachers’ beliefs about aspects influencing transfer, including beliefs on improving this transfer. Together with identified improvement aspects about coherent mathematics education, these may help reduce physics teachers’ frustrations who spend extra time on re-teaching mathematics. Teachers think that transfer does not happen, because students see both subjects as separate disciplines. Contrary to most physics teachers, most mathematics teachers do not feel the need to collaborate with physics teachers. We found two extreme, opposite beliefs about the transfer of algebraic skills into physics. An intermediate group believes that only an integrated approach can solve the transfer problem. Some of the teachers’ beliefs could be organised into a beliefs system. Further research could investigate to which extent such beliefs systems exist and which beliefs these contain.  相似文献   
55.
Environmental degradation stemming from anthropocentric causes threatens the biodiversity more than ever before, leading scholars to warn governments about the impending consequences of biodiversity loss (BL). At this point, it is of great importance to study the public’s conceptions of BL in order to identify significant educational implications. However, a review of the literature reveals a relatively small body of research about the public understanding of BL. In this qualitative study, we thus strived to elicit Turkish school students’ conceptions about BL using a written questionnaire including open-ended questions with respect to the definition of biodiversity as well as reasons for, results of and solutions to BL. The sample consisted of 245 school students in a relatively small city. A two-staged content analysis was run on the responses. The results showed that school students most commonly preferred species-focused definitions of biodiversity and understood BL through such various conceptual patterns as, ‘balance of nature’, ‘forest’, ‘global warming’, ‘hunting’ and ‘indirect conservation’. At the end of the paper, the possible educational implications and future perspectives were discussed.  相似文献   
56.
The purpose of the present study was to explore through qualitative methodology the practice of visiting shrines, a religious practice indigenous to Turkish Muslims, and its potential mental health benefits. Thirteen individuals were interviewed at two shrines in Istanbul, Turkey. The researchers focused on visitors’ presenting issues, beliefs regarding the practice, the mental health benefits of the visit, and the behaviors that the visitors engaged in during their visit. The data were analyzed using the Consensual Qualitative Research method. Five domains emerged from the data: (i) degree of religiosity and duties, (ii) knowledge and beliefs about shrines, (iii) purpose of visits, (iv) activities during the visit, and (v) experience and impact of the visit. The findings were discussed based on the mental health benefits of visiting shrines and the counseling and cultural implications.  相似文献   
57.
The study aims to demonstrate evidence of (a) students’ conceptual change on solution rates; (b) students’ sub‐microscopic explanations of dissolution; and (c) retention of the concepts of solution rates. The sample consists of 44 Grade 9 students (18 boys and 26 girls) drawn purposively from two different classes (22 each) in the city of Trabzon, Turkey. The current study incorporates multiple methods of data collection: items from a solution concept test, clinical interviews and examination of students’ self‐assessment tasks. The results reveal that there is a statistically significant difference between scores in pre‐test and post‐test and between pre‐test and delayed test (p < 0.05). This research indicates that the intervention has improved students’ understanding of the conceptual relationship between solution rates and the sub‐microscopic explanation of dissolution. It has also helped in overcoming students’ alternative conceptions to some extent. However, alternative conceptions have not been eliminated completely. In the light of the results, this current study suggests that a simple model such as the four‐step constructivist teaching (4E) is efficient.  相似文献   
58.
Multicultural early childhood education is necessary in a culturally diverse country like Malaysia. Preschool teachers play an important role in implementing multicultural education in the classroom. This paper reports the findings of a self-report questionnaire involving 854 preschool teachers in Malaysia. The preschool teachers disclosed their current multicultural education practices as well as the challenges they encountered when implementing multicultural education. While the majority of teachers claimed that they implemented multicultural education, a closer examination revealed that most of them used the tourist or contribution approach which focuses on only the outward manifestations of a culture when dealing with multicultural education. The transformation or anti-bias approach was used by only a small number of teachers. The teachers identified some challenges in multicultural education implementation, such as lack of instructional resources and the lack of stakeholder support. Thus, it is important to ensure teachers develop more critical understandings of multicultural education through teacher education training and programs. Other efforts to help teachers overcome challenges in implementing multicultural education include producing and developing more instructional materials and learning aids, which are suitable for young children and appropriate for the local context. Preschool teachers also need stakeholders to give more support and to acknowledge the importance of implementing multicultural early childhood education.  相似文献   
59.
Başak Bilecen 《Compare》2013,43(5):667-688
Drawing on the literature on international student experiences and identities, this study discusses theories of identity from a social constructionist perspective. ‘Identification’ is the preferred term to describe a dynamic process through which students negotiate the meaning of their identities in different societies and communities. Based on interviews with 35 international doctoral students from two graduate schools in Germany, the article illustrates the significance of international mobility for education when external ‘differences’ are appreciated and contribute to cosmopolitan imaginations and when internal differences are created in relation to ‘Others’ in the host society. The article contributes to the literature on international student mobility by providing a fine-grained analysis of student identification, showing how the discourse of difference is used as a double strategy.  相似文献   
60.
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