全文获取类型
收费全文 | 266篇 |
免费 | 18篇 |
出版年
2024年 | 2篇 |
2023年 | 7篇 |
2022年 | 2篇 |
2021年 | 9篇 |
2020年 | 8篇 |
2019年 | 10篇 |
2018年 | 22篇 |
2017年 | 17篇 |
2016年 | 14篇 |
2015年 | 12篇 |
2014年 | 15篇 |
2013年 | 32篇 |
2012年 | 9篇 |
2011年 | 16篇 |
2010年 | 12篇 |
2009年 | 12篇 |
2008年 | 14篇 |
2007年 | 12篇 |
2006年 | 7篇 |
2005年 | 9篇 |
2004年 | 6篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2001年 | 7篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 5篇 |
1992年 | 2篇 |
1985年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有284条查询结果,搜索用时 15 毫秒
281.
ABSTRACTAt the regional level, the imperative of sustainable development often manifests itself in an emphasis on developing green industries. However, regions vary in their preconditions for achieving this. In this paper we link regional preconditions to various pathways for green industry development. This provides the foundation for identifying place-based policy implications for growing green industries in different types of regions, grounded in the emerging perspective in innovation studies on transformative innovation policy. The paper thereby helps to understand the pathways for greening the economy in different regional contexts and how such green pathways can be promoted through policy. 相似文献
282.
Growth curves were prepared for length and various other dimensions, including some innovative ones, of the scapula, clavicle, first rib, ilium, pubis and ischium of ages up to 20 years including several immature and many full-term fetuses. Most curves showed, like the previously reported diaphyses of the limb bones, what appears to be a consistent adolescent growth spurt at about 17 years, but the number of specimens supporting these parts of the curves is too small for the validity of this growth spurt to be beyond doubt. The fetal dimensions were similar to those of Fazekas and Kósa and of other recent populations. For the post-natal stages of growth, no data are available for comparison but there was close correspondence with the growth curves of some ancient peoples, Amerindian, caucasoid and negroid, whose limb-bone growth rates had also been shown previously to be well below those of contemporary caucasoids. Thus it is argued that the shoulder-girdle and hip-bone data provided further evidence that this Scottish island population was affected by stunting factors. Although there is no skeletal evidence of malnutrition, there is plenty of evidence that the way of life was full of hardship in which the children shared. They took a full part in the arduous work involved in farming marginal-quality land; the houses were damp, cold, smoky and dark; they were overcrowded although, mainly because of the high infantmortality rate, families were not large. 相似文献
283.
Wim Van Neer 《International Journal of Osteoarchaeology》1993,3(2):119-127
An evaluation is given of the value for seasonality studies of incremental growth in the pectoral spines of the Nile catfish Clarias gariepinus. The subfossil spines used for this study are from a Byzantino-Islamic site in Syria, and probably all derive from animals captured on the floodplain during the yearly inundation of the nearby Orontes river, although only 45 per cent of the spines could be recognized as deriving from fish captured during that period. It is believed that the inability to date accurately the season of capture of the other specimens is due to disadvantages inherent in the growth cycle of the fish. For the moment it is possible to determine the season of death only of individuals that were taken during a period of rapid growth. 相似文献
284.