全文获取类型
收费全文 | 1984篇 |
免费 | 152篇 |
国内免费 | 90篇 |
出版年
2024年 | 2篇 |
2023年 | 81篇 |
2022年 | 91篇 |
2021年 | 149篇 |
2020年 | 110篇 |
2019年 | 116篇 |
2018年 | 93篇 |
2017年 | 61篇 |
2016年 | 82篇 |
2015年 | 79篇 |
2014年 | 116篇 |
2013年 | 132篇 |
2012年 | 83篇 |
2011年 | 99篇 |
2010年 | 88篇 |
2009年 | 99篇 |
2008年 | 100篇 |
2007年 | 105篇 |
2006年 | 82篇 |
2005年 | 58篇 |
2004年 | 60篇 |
2003年 | 65篇 |
2002年 | 47篇 |
2001年 | 36篇 |
2000年 | 35篇 |
1999年 | 17篇 |
1998年 | 20篇 |
1997年 | 20篇 |
1996年 | 19篇 |
1995年 | 9篇 |
1994年 | 13篇 |
1993年 | 13篇 |
1992年 | 9篇 |
1991年 | 7篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 8篇 |
1987年 | 1篇 |
1985年 | 6篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 2篇 |
排序方式: 共有2226条查询结果,搜索用时 15 毫秒
1.
《Cell reports》2020,30(4):1152-1163.e4
2.
3.
4.
Steven M. Melemis 《The Yale journal of biology and medicine》2015,88(3):325-332
There are four main ideas in relapse prevention. First, relapse is a gradual process with distinct stages. The goal of treatment is to help individuals recognize the early stages, in which the chances of success are greatest. Second, recovery is a process of personal growth with developmental milestones. Each stage of recovery has its own risks of relapse. Third, the main tools of relapse prevention are cognitive therapy and mind-body relaxation, which are used to develop healthy coping skills. Fourth, most relapses can be explained in terms of a few basic rules. Educating clients in these rules can help them focus on what is important: 1) change your life (recovery involves creating a new life where it is easier to not use); 2) be completely honest; 3) ask for help; 4) practice self-care; and 5) don’t bend the rules. 相似文献
5.
6.
7.
9.
10.
Tomer J. Czaczkes Jürgen Heinze 《Proceedings. Biological sciences / The Royal Society》2015,282(1810)
Animals must contend with an ever-changing environment. Social animals, especially eusocial insects such as ants and bees, rely heavily on communication for their success. However, in a changing environment, communicated information can become rapidly outdated. This is a particular problem for pheromone trail using ants, as once deposited pheromones cannot be removed. Here, we study the response of ant foragers to an environmental change. Ants were trained to one feeder location, and the feeder was then moved to a different location. We found that ants responded to an environmental change by strongly upregulating pheromone deposition immediately after experiencing the change. This may help maintain the colony''s foraging flexibility, and allow multiple food locations to be exploited simultaneously. Our treatment also caused uncertainty in the foragers, by making their memories less reliable. Ants which had made an error but eventually found the food source upregulated pheromone deposition when returning to the nest. Intriguingly, ants on their way towards the food source downregulated pheromone deposition if they were going to make an error. This may suggest that individual ants can measure the reliability of their own memories and respond appropriately. 相似文献