全文获取类型
| 收费全文 | 65篇 |
| 免费 | 1篇 |
| 国内免费 | 28篇 |
专业分类
| 教育 | 44篇 |
| 科学研究 | 40篇 |
| 各国文化 | 3篇 |
| 体育 | 2篇 |
| 信息传播 | 5篇 |
出版年
| 2021年 | 2篇 |
| 2020年 | 6篇 |
| 2019年 | 2篇 |
| 2018年 | 3篇 |
| 2017年 | 1篇 |
| 2016年 | 4篇 |
| 2015年 | 3篇 |
| 2014年 | 3篇 |
| 2013年 | 6篇 |
| 2012年 | 3篇 |
| 2011年 | 5篇 |
| 2010年 | 2篇 |
| 2009年 | 4篇 |
| 2007年 | 2篇 |
| 2006年 | 4篇 |
| 2005年 | 5篇 |
| 2004年 | 3篇 |
| 2003年 | 2篇 |
| 2001年 | 1篇 |
| 2000年 | 1篇 |
| 1998年 | 1篇 |
| 1997年 | 1篇 |
| 1996年 | 1篇 |
| 1995年 | 1篇 |
| 1994年 | 2篇 |
| 1993年 | 2篇 |
| 1992年 | 1篇 |
| 1991年 | 2篇 |
| 1989年 | 1篇 |
| 1988年 | 2篇 |
| 1987年 | 2篇 |
| 1986年 | 2篇 |
| 1985年 | 1篇 |
| 1984年 | 3篇 |
| 1983年 | 1篇 |
| 1982年 | 1篇 |
| 1981年 | 2篇 |
| 1979年 | 3篇 |
| 1978年 | 2篇 |
| 1966年 | 1篇 |
排序方式： 共有94条查询结果，搜索用时 238 毫秒
51.
52.
Ju‐Ling Shih Hui‐Chun Chu Gwo‐Jen Hwang Kinshuk 《British journal of educational technology : journal of the Council for Educational Technology》2011,42(3):373-394
In recent years, digital learning has been converting from e‐learning to m‐learning because of the significant growth of wireless and mobile computing technologies. Students can learn any time and any where with mobile devices. Consequently, context‐aware ubiquitous learning (u‐learning) is emerging as a new research area. It integrates wireless, mobile and context awareness technologies in order to detect the situation of the learners and provide more seamless adaptive support in the learning process. In this paper, a context‐aware u‐learning environment is developed for learning about campus vegetation in elementary schools based on an innovative approach by employing repertory grid method in designing learning content. In addition, we probe the feasibility of context‐aware u‐learning in courses by soliciting feedback from the students and teachers through interviews and questionnaires. The findings reveal that the environment is capable of enhancing students’ motivation and learning effectiveness. Moreover, it is also capable of reducing the teaching load while enabling better control of class order. 相似文献
53.
石铸 《中国科学院研究生院学报》1987,25(1):39-49
About 22 species of the genus Scorzonera L. are so far known to occur in China.
Among them, S. pamirica Shih is described as new and 3 species, S. tau-sahyz Lipsch. et Bosse,
S. pubescens DC. and S. transiliensis M. Pop., are new records to China. Four names in the
literature are reduced to synonyms,and some wrong identications in Chinese botanical literature
are pointed out in this work. Some species with considerable variation in morphology, such as,
S. pseudodivaricata Lipsch. and S. sinensis Lipsch. ex Krasch., are also discussed here. 相似文献
54.
中国菊科菜蓟族植物研究(Ⅱ) 总被引：1，自引：0，他引：1
石铸 《中国科学院研究生院学报》1984,22(5):386-396
本文是对国产菜蓟族两个属研究的一个小结。一个是蓟属(Cirsium Mill. Ecmend．Scop.)，将全部国产蓟属49种植物分隶排列在8个组中，其中3个组为新成立的组，1个组为新的组合。记载了9个新种，1个新组合种，4个种为中国分布新记录。将过去学者们发表的组、种 及变种等各级上的65个名称处理为新异名，检查出错误鉴定8处，对变异较大的种给予了说明和讨论。另一个是刺膜菊属(Alfredia Cass.)，记载了一个新种。 相似文献
55.
56.
57.
This study presents the random-effects rating scale model (RE-RSM) which takes into account randomness in the thresholds over persons by treating them as random-effects and adding a random variable for each threshold in the rating scale model (RSM) ( Andrich, 1978 ). The RE-RSM turns out to be a special case of the multidimensional random coefficients multinomial logit model (MRCMLM) ( Adams, Wilson, & Wang, 1997 ) so that the estimation procedures for the MRCMLM can be directly applied. The results of the simulation indicated that when the data were generated from the RSM, using the RSM and the RE-RSM to fit the data made little difference: both resulting in accurate parameter recovery. When the data were generated from the RE-RSM, using the RE-RSM to fit the data resulted in unbiased estimates, whereas using the RSM resulted in biased estimates, large fit statistics for the thresholds, and inflated test reliability. An empirical example of 10 items with four-point rating scales was illustrated in which four models were compared: the RSM, the RE-RSM, the partial credit model ( Masters, 1982 ), and the constrained random-effects partial credit model. In this real data set, the need for a random-effects formulation becomes clear. 相似文献
58.
59.
A sample of 209 secondary (12th grade) students were tested for their knowledge of Chinese characters, words, and idioms as specified in a Chinese Language syllabus. The students also took comprehension tests in the form of cloze tests based on passages selected from Chinese newspapers and literary works, covering occupations, social events, sports, leisure pursuits and international news. Although performance in curriculum-based tests was satisfactory, the students were found to have difficulty comprehending life-based reading materials. Probable causes for the lack of consistency between performances in the tests using different reading materials are discussed. 相似文献
60.