全文获取类型
收费全文 | 623篇 |
免费 | 2篇 |
专业分类
教育 | 272篇 |
科学研究 | 26篇 |
各国文化 | 251篇 |
体育 | 13篇 |
文化理论 | 3篇 |
信息传播 | 60篇 |
出版年
2021年 | 2篇 |
2020年 | 6篇 |
2019年 | 12篇 |
2018年 | 7篇 |
2017年 | 3篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2014年 | 9篇 |
2013年 | 108篇 |
2012年 | 4篇 |
2011年 | 8篇 |
2010年 | 12篇 |
2009年 | 31篇 |
2008年 | 54篇 |
2007年 | 71篇 |
2006年 | 49篇 |
2005年 | 29篇 |
2004年 | 35篇 |
2003年 | 12篇 |
2002年 | 12篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 5篇 |
1997年 | 2篇 |
1996年 | 6篇 |
1995年 | 7篇 |
1994年 | 5篇 |
1993年 | 7篇 |
1992年 | 6篇 |
1991年 | 7篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1988年 | 5篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 12篇 |
1984年 | 5篇 |
1983年 | 6篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1979年 | 5篇 |
1978年 | 4篇 |
1977年 | 3篇 |
1975年 | 2篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1968年 | 3篇 |
1967年 | 3篇 |
1926年 | 1篇 |
1920年 | 1篇 |
排序方式: 共有625条查询结果,搜索用时 15 毫秒
611.
612.
One of the difficulties in Latin American development is attracting highly qualified professionals to interior cities with growth potential. Also, as in most less developed countries of the world, this is accompanied by a tendency toward a permanent ruralurban migration of the existing, more qualified personnel, leaving interior regions deficient in an important development resource. In this study a culturally versatile method to identify perceived desirable characteristics of cities as places to work and live is proposed. A triadic selection procedure and factor analysis are employed with a case study sample of graduate students in Rio Grande do Sul, Brazil. The results show that there are four major categories of attributes (population, economic, cultural, and physical) which could be used as incentives to attract people to medium sized interior cities in developing countries. Various ways in which the local university could be employed in such strategies are presented as examples of planning possibilities. 相似文献
613.
Arun Ray Susri Ray Chaudhuri Biswajit Majumdar Sandip K. Bandyopadhyay 《Indian journal of clinical biochemistry : IJCB》2002,17(2):44-51
Oral administration of ethanol extract of the rhizome ofPirorhiza kurroa at a dose of 20mg/kg body weight, for 10 consecutive days, was found to enhance the rate of healing on Indomethacin-induced
gastric ulcer in rats, compared to the ulcerated group without treatment. The level of peroxidised lipid, in terms of thiobarbituric
acid reactive species (TBARS), in gastric tissue, was increased in ulcerated rats which was restored to near normalcy on treatment
with ethanol extract. The specific activity ofin vivo antioxidant enzymes, viz SOD and catalase and total tissue sulfhydryl (thiol) group, which were markedly decreased in ulcerated
group, were found to be significantly elevated (p<0.05), on treatment with the above extract, at the specified dose, compared
to the indomethacin—induced ulcerated group without any supporting treatment. The present study thus suggests that the ethanol
extract of rhizome ofPicrorhiza kurroa, at the dose of 20mg/kg body weight, accelerated the healing of stomach wall of indomethacin induced gastric ulcerated rats
by anin vivo free radical scavenging action. 相似文献
614.
A new and systematic approach for the analysis and simulation of a non-circular chainwheel in a bicycle drive system is presented. The proposed leg-bicycle model is based on a five-bar linkage and explicit expressions for the kinematics and kinetics are derived. The generated shape of the chainwheel is smoothed to an ellipse, for practical reasons. The performance of this elliptical chainwheel is assessed by comparing the joint moments, leg angular accelerations, crank angular velocities, crank angular accelerations and output forces with those of a conventional circular chainwheel. The results suggest combining the elliptical and circular chainwheels into a single unit, in order to accommodate a wide range of pedalling speeds. At low speeds, the elliptical chainwheel is engaged, but as the speed increases, a switch over to the circular chainwheel is recommended. 相似文献
615.
Informational text is an important resource for classroom teachers that places unique comprehension demands on young students.
Research on teaching expository text structure to young children shows that explicit instruction improves student comprehension.
This practical article addresses how to use “well-structured” expository trade book titles to teach text structure. A lesson
plan template and an extended example of an explicit lesson on order/sequence are provided. 相似文献
616.
Disparities in health and healthcare are a major concern in the United States and worldwide. Approaches to alleviate these disparities must be multifaceted and should include initiatives that touch upon the diverse areas that influence the healthcare system. Developing a strong biomedical workforce with an awareness of the issues concerning health disparities is crucial for addressing this issue. Establishing undergraduate health disparities courses that are accessible to undergraduate students in the life sciences is necessary to increase students’ understanding and awareness of these issues and motivate them to address these disparities during their careers. The majority of universities do not include courses related to health disparities in their curricula, and only a few universities manage them from their life sciences departments. The figures are especially low for minority-serving institutions, which serve students from communities disproportionally affected by health disparities. Universities should consider several possible approaches to infuse their undergraduate curricula with health disparities courses or activities. Eliminating health disparities will require efforts from diverse stakeholders. Undergraduate institutions can play an important role in developing an aware biomedical workforce and helping to close the gap in health outcomes. 相似文献
617.
W. Ray Crozier 《Educational Psychology in Practice》2014,30(2):156-166
Shy and withdrawn behaviours are cause for concern and have attracted contrasting perspectives. On the one hand, they are regarded as predictive of social anxiety disorder and may benefit from intervention; on the other hand, there are claims that normal behaviours are being pathologised. Evidence is reviewed which suggests that while they represent a risk factor for social anxiety disorder, these patterns of behaviours are only moderately predictive, the large majority of shy children do not go on to meet diagnostic criteria for social anxiety disorder, nor have adults who meet these criteria necessarily been shy as children. A fruitful approach may be to develop effective social and emotional learning programmes to increase children’s understanding of shyness and to aid identification of children at risk. 相似文献
618.
Using the evaluation research strategy (Geroy & Wright, 1988) as a guideline, the authors conducted a needs assessment with 280 support staff, faculty, and administrators at a mid–sized community college. We taught the nominal group technique (Delbecq & Van de Ven, 1971) to representatives from each of these three groups. These representatives facilitated the participation of virtually all employees at the college in identifying a prioritized list of items that would enable these persons to “do their jobs better.” Analysis of the suggested performance improvement solutions utilized the performance technology model (Gilbert, 1978) and indicated that the solutions fell into five categories of intervention: high–yield training, direction and flow of information, resources, performance incentives, and medium–yield training. This combination of models and methods provided the decision makers with data that refocused their vision from planning professional development training to planning for performance improvement. These data represented needs, not wants, and enabled them to recognize the importance of addressing both training and non–training options. 相似文献
619.
This paper explores the nature of Information Management (IM) pedagogic practice within UK higher education (HE), by exploring the history of IM and teasing out what this may mean for its teaching. Empirical evidence is considered from both qualitative and quantitative data analysis perspectives through the application of Grounded theory. 相似文献
620.
M. Sachidhanandam S. N. Singh A. K. Salhan Uday Sankar Ray 《Indian journal of clinical biochemistry : IJCB》2010,25(2):153-157
The study involved three ethnic groups of India; Rajputs, Gorkhas and South-Indians. Each group consisted of ∼40 healthy,
male soldiers between 20–50 years. The reference ranges for cortisol, testosterone, prolactin, arginine vasopressin and proAtrial
natriuretic peptide1–98 were determined using Enzyme-Immunoassay (EIA) while plasma levels of thyroid-stimulating hormone, triiodothyronine, free-triiodothyronine,
thyroxine and freethyroxine were measured using Enzyme-linked immunosorbent assay (ELISA). The results indicated that plasma
hormone concentrations were within physiological range and inter-ethnic differences were most prominent between north- (Rajputs
and Gorkhas) and south- Indians. In comparison to Radioimmunoassay, the EIA method for prolactin, thyroid-stimulating hormone,
free-thyroxine gave higher values while the ELISA method for triiodothyronine, free-triiodothyronine, and thyroxine gave lower
values. These differences are due to differences in assay standards and design. 相似文献