全文获取类型
收费全文 | 1442篇 |
免费 | 31篇 |
专业分类
教育 | 1138篇 |
科学研究 | 62篇 |
各国文化 | 25篇 |
体育 | 90篇 |
综合类 | 1篇 |
文化理论 | 8篇 |
信息传播 | 149篇 |
出版年
2023年 | 13篇 |
2022年 | 20篇 |
2021年 | 27篇 |
2020年 | 44篇 |
2019年 | 65篇 |
2018年 | 82篇 |
2017年 | 95篇 |
2016年 | 88篇 |
2015年 | 38篇 |
2014年 | 54篇 |
2013年 | 295篇 |
2012年 | 30篇 |
2011年 | 50篇 |
2010年 | 43篇 |
2009年 | 44篇 |
2008年 | 33篇 |
2007年 | 24篇 |
2006年 | 23篇 |
2005年 | 25篇 |
2004年 | 32篇 |
2003年 | 19篇 |
2002年 | 22篇 |
2001年 | 17篇 |
2000年 | 19篇 |
1999年 | 12篇 |
1998年 | 11篇 |
1997年 | 11篇 |
1996年 | 10篇 |
1995年 | 10篇 |
1994年 | 21篇 |
1993年 | 6篇 |
1992年 | 12篇 |
1991年 | 7篇 |
1990年 | 14篇 |
1989年 | 6篇 |
1986年 | 5篇 |
1985年 | 12篇 |
1984年 | 12篇 |
1983年 | 6篇 |
1982年 | 9篇 |
1981年 | 12篇 |
1980年 | 9篇 |
1979年 | 11篇 |
1978年 | 4篇 |
1977年 | 8篇 |
1976年 | 4篇 |
1975年 | 4篇 |
1973年 | 7篇 |
1971年 | 7篇 |
1968年 | 5篇 |
排序方式: 共有1473条查询结果,搜索用时 15 毫秒
121.
122.
This paper reports on a research project which examined the potential ofthe Internet, and other networked information resources, to improve access to information fortrained nurses working in remote areas. This paper provides a review of current literature in thefield. It describes the research carried out, presents a summary of the research findings anddiscusses the implications of these findings. The paper concludes that the Internet and networkedresources do have considerable potential to improve access to information for nurses working inremote and rural areas. However, information skills, along with professional guidance, are alsorequired. 相似文献
123.
This study compares the instrumentation and analysis techniques used when determining the power expended pedalling a rope-braked
ergometer manufactured by Monark (Sweden) during a low intensity test. Power values were generated by eight subjects. The
instrumentation consisted of load cells to measure the rope brake forces, a tachometer to measure the flywheel velocity and
instrumented pedal cranks manufactured by Schoberer Rad Messtechnik (SRM). The subjects pedalled a rope-braked ergometer at
60 rev min-1, against a resistance of 3 kg, for 5 minutes. Three different measurements of the mean power were recorded and these were
compared with the value given by Monark. The SRM cranks provided two sets of results using different software packages supplied
with the cranks. SRM standard software is used for taking measurements during training and cycle races over long time periods.
An additional piece of software is provided by SRM called Ptnew, which gives readings of torque and pedal cadence over periods
up to 30 seconds. Using the values supplied by Monark each subject generated 180 W of power. The mean power for the eight
subjects, measured using the SRM cranks, was 170.36 W (SD 4.11) using the alternative SRM software (Ptnew) over a 30 second
period and 173.68 W (SD 2.21) using the standard SRM software. From the direct measurement of the brake forces and flywheel
velocity the mean power across the eight subjects was 148.90 W (SD 5.89). The SRM cranks measure the input power, whereas
the direct measurement system measures the power output excluding mechanical losses. These values give a figure for the mechanical
efficiency for the roped-braked ergometer of 88%. It was found that Monark overestimates the power generated by the subjects
when compared with both the SRM systems and the direct measurement instrumentation. 相似文献
124.
125.
Gordon E Finley 《Int J Intercult Relat》1979,3(1):5-13
Although the topic of research collaboration receives infrequent comment, a well functioning collaborative process is crucial to the substantive success of intercultural research enterprises. The present report addresses this topic and focuses on two major sets of collaborative issues, the personal/ personnel and the structural/organizational. The issues are organized around the phases of the project at which they optimally should be considered and resolved. 相似文献
126.
127.
128.
129.
130.