全文获取类型
收费全文 | 257篇 |
免费 | 6篇 |
专业分类
教育 | 160篇 |
科学研究 | 61篇 |
各国文化 | 2篇 |
体育 | 7篇 |
文化理论 | 4篇 |
信息传播 | 29篇 |
出版年
2023年 | 3篇 |
2022年 | 6篇 |
2021年 | 8篇 |
2020年 | 5篇 |
2019年 | 22篇 |
2018年 | 24篇 |
2017年 | 16篇 |
2016年 | 9篇 |
2015年 | 9篇 |
2014年 | 14篇 |
2013年 | 40篇 |
2012年 | 11篇 |
2011年 | 15篇 |
2010年 | 9篇 |
2009年 | 8篇 |
2008年 | 1篇 |
2007年 | 7篇 |
2006年 | 5篇 |
2005年 | 6篇 |
2004年 | 4篇 |
2003年 | 3篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1992年 | 7篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1975年 | 1篇 |
排序方式: 共有263条查询结果,搜索用时 265 毫秒
81.
82.
Ahmed Yaqinuddin Muhammad Zafar Muhammad Faisal Ikram Paul Ganguly 《Anatomical sciences education》2013,6(2):125-133
Assessing teaching‐learning outcomes in anatomical knowledge is a complex task that requires the evaluation of multiple domains: theoretical, practical, and clinical knowledge. In general, theoretical knowledge is tested by a written examination system constituted by multiple choice questions (MCQs) and/or short answer questions (SAQ). The assessment of practical knowledge (three‐dimensional anatomical concepts) involves oral, spot, or objective structured practical examinations (OSPE). Finally, the application of anatomical knowledge to patients is tested mainly through objective structured clinical examinations (OSCE). The major focus of this study is the OSPE. Although many schools challenge students using this tool in practical examinations in the early phase of the curriculum, the true meaning of OSPE is frequently forgotten and it becomes, in reality, a spot examination. This article, for the first time, describes how the concept of the OSPE has evolved and is currently being used to assess the practical domain of anatomical knowledge in a problem‐based curriculum at Alfaisal University College of Medicine. In addition, it describes the main differences from the spot examination, which is normally used in traditional medical curricula. The authors believe that the OSPE remains the most efficient tool to assess the practical aspects of anatomical knowledge in a system where basic knowledge is integrated with the clinical or functional part of anatomy. However, this contention only holds true if the OSPE process revolves around structured objectives. Anat Sci Educ 6: 125–133. © 2012 American Association of Anatomists. 相似文献
83.
Dimitris Kiritsis Ahmed Bufardi Dimitris Mavrikios Thomas Knothe Hadrien Szigeti Anirban Majumdar 《Education and Information Technologies》2013,18(2):331-350
Manufacturing industry can improve its competitiveness through innovation and technological excellence, and appropriate Industrial Learning can help to achieve this goal through allowing the manufacturing workforce to acquire new skills related to the advanced developments in information and communication technologies. This raises the need for new Industrial Learning tools and methods from the viewpoint of learning content, learning processes, and delivery mechanisms. In this paper, we present a generic competence-based approach for Industrial Learning developed in the framework of ActionPlanT project. The approach is composed of (i) an Industrial Learning model which serves to represent and understand competence-based learning, and (ii) a methodology which implements through a number of steps the Industrial Learning actions defined using the Industrial Learning model in industrial organisations. Both the model and the methodology are presented in details. A metrics-based method for evaluating the implementation of the learning actions defined using the approach is also described. 相似文献
84.
The article discusses the need for initiatives to be undertaken by the King Fahd University of Petroleum & Minerals Library administration to acquire archives of and perpetual access to its subscribed electronic journals. It also reports the findings of a survey conducted to ascertain the publishers' positions on archiving services and the right to permanently access licensed materials paid for during the period of a license agreement. The findings are expected to help the library to plan for securing the right over a three-year period to ongoing access to the back files of journals from fifteen commercial and society publisher platforms. 相似文献
85.
This study examined the use of electronic resources among academic scholars of The Islamia University of Bahawalpur (IUB), Punjab, Pakistan. A quantitative survey was found most convenient and useful for this study. The total population of the study was 169 research students in IUB. The response rate was 79% and 133 utilizable responses were coded and analyzed by using SPSS software. Results of the study showed that most of the researchers (61%) used electronic resources daily for many purposes and reasons. Most of them (57%) were “satisfied” with the usage of electronic resources. Learning, education, and research were the main purposes, and easy use and easy access to documents were the major reasons of using these resources. Lack of internet connection is the major problem faced by the respondents. 相似文献
86.
Nadeem Akhtar Abbasi Tariq Pervaiz Ishfaq Ahmed Hafiz Mehwish Yaseen Azhar Hussain 《Journal of Zhejiang University. Science. B》2013,14(9):774-784
In vitro cultures of loquat cultivar Mardan were established using shoot apices after treating with NaOCl (5%, 7%, 10%, 12%, 14% (v/v)) for 12 min and HgCl2 (0.01%, 0.05%, 0.10%, 0.20%, 0.25% (w/v)) for 2 min. A maximum survival rate of 70% was recorded after surface sterilization with 10% NaOCl. Caulogenic response was assessed on Murashige and Skoog (MS) medium fortified with assorted combinations of the cytokinins, benzylaminopurine (BAP), kinetin, and N6-(2-isopentyl)adenine (2iP). Treatment of BAP 1.5 mg/L combined with 2iP 9.0 mg/L and kinetin 1.5 mg/L was found to be optimum for shoot morphogenesis in terms of the number and subsequent growth of shoots, while the highest shoot length was yielded by the combination of BAP 0.5 mg/L, kinetin 0.5 mg/L, and 2iP 3 mg/L. Higher levels of cytokinins induced callogenesis, vitrification and stunted growth to some extent. For rhizogenesis, uniform sized micro-shoots were excised and transferred to half-strength MS medium containing auxins. The best rooting expression was observed with naphthaleneacetic acid (NAA) 1 mg/L combined with indole-3-butyric acid (IBA) 2 mg/L and paclobutrazol (PBZ) 1 mg/L. 相似文献
87.
Citizens as consumers: Profiling e-government services’ users in Egypt via data mining techniques 总被引:1,自引:0,他引:1
This study uses data mining techniques to examine the effect of various demographic, cognitive and psychographic factors on Egyptian citizens’ use of e-government services. Data mining uses a broad family of computationally intensive methods that include decision trees, neural networks, rule induction, machine learning and graphic visualization. Three artificial neural network models (multi-layer perceptron neural network [MLP], probabilistic neural network [PNN] and self-organizing maps neural network [SOM]) and three machine learning techniques (classification and regression trees [CART], multivariate adaptive regression splines [MARS], and support vector machines [SVM]) are compared to a standard statistical method (linear discriminant analysis [LDA]). The variable sets considered are sex, age, educational level, e-government services perceived usefulness, ease of use, compatibility, subjective norms, trust, civic mindedness, and attitudes. The study shows how it is possible to identify various dimensions of e-government services usage behavior by uncovering complex patterns in the dataset, and also shows the classification abilities of data mining techniques. 相似文献
88.
Abdul Samad Aziz Madhav Govind Kalekar Adinath Narayan Suryakar Tabita Benjamin Milsee Jaya Prakashan Bijle Mohammed Nadeem Ahmed Mehmood Sayyad 《Indian journal of clinical biochemistry : IJCB》2013,28(4):374-380
The present study aims to assess and compare the biochemical oxidative stress markers in male smokers and non-smokers with chronic periodontitis. One hundred thirty-four male chronic periodontitis patients and 64 apparently healthy male volunteers were recruited for the study. The periodontal status was evaluated by measuring gingival index, plaque index, papillary bleeding index and clinical attachment loss using UNC-15 probe. The biochemical markers estimated were total antioxidant capacity, RBC-superoxide dismutase, glutathione peroxidase, vitamin C, malondialdehyde and C-reactive protein. The obtained results indicate higher oxidative stress in chronic periodontitis. Smokers with chronic periodontitis show significantly higher periodontal clinical parameters and relatively higher systemic oxidative stress. Vitamin C estimation may be an important biochemical parameter in conjunction with clinical parameters for diagnosis of chronic periodontitis in smokers. 相似文献
89.
This multiple case study examined pre-service teachers perceptions of effective post-secondary instruction. Pre-service teachers
were asked to write essays describing an effective teacher of their choice. Twenty-one essays were randomly selected. Data
analysis involved open coding of each essay, content analysis of each essay using Anderson and Burns’ (Research in classrooms:
The study of teachers, teaching, and instruction (1st ed.). Oxford, England; New York: Pergamon Press, 1989) empirically derived
dimensions of instruction, and effect size analysis of student and teacher roles. Instructional components were identified
that differentiate between effective inquiry instruction and effective instruction. Effective inquiry instruction was associated
with more and different teacher and student roles, more activities as part of instruction, and more student small group discussion
than was effective instruction. 相似文献
90.
Sameen Ahmed Khan 《Resonance》2012,17(5):468-475
It is straightforward to construct the set of equivalent resistance for circuits constructed from a bunch of four or five equal resistors. But as the bunch size increases it becomes difficult to find the order of the set of equivalent resistances. Even the computer programs runs out of memory. Here we present an analytical result using simple mathematical machinery. The size of the set is shown to be less than 2.618 n . 相似文献