全文获取类型
收费全文 | 738篇 |
免费 | 48篇 |
出版年
2023年 | 14篇 |
2022年 | 14篇 |
2021年 | 19篇 |
2020年 | 22篇 |
2019年 | 13篇 |
2018年 | 48篇 |
2017年 | 38篇 |
2016年 | 44篇 |
2015年 | 24篇 |
2014年 | 31篇 |
2013年 | 99篇 |
2012年 | 44篇 |
2011年 | 33篇 |
2010年 | 26篇 |
2009年 | 17篇 |
2008年 | 43篇 |
2007年 | 37篇 |
2006年 | 28篇 |
2005年 | 29篇 |
2004年 | 18篇 |
2003年 | 18篇 |
2002年 | 13篇 |
2001年 | 4篇 |
2000年 | 18篇 |
1999年 | 7篇 |
1998年 | 5篇 |
1997年 | 5篇 |
1996年 | 6篇 |
1995年 | 5篇 |
1994年 | 5篇 |
1993年 | 5篇 |
1992年 | 6篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1984年 | 5篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1977年 | 3篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 2篇 |
1972年 | 1篇 |
排序方式: 共有786条查询结果,搜索用时 15 毫秒
131.
132.
133.
The purpose of this article is to compare the theory and reality of agricultural research networks in sub-Saharan Africa.
Networking is a mode of organization that generally suits the new environmental conditions. The analysis of the agricultural
research network environment in sub-Saharan Africa shows that when institutional networks started to proliferate, human and
institutional conditions were not yet ripe. This explained some of the problems. Nowadays, conditions have improved. Despite
all difficulties, networks have contributed to creating a scientific community, have participated in apportioning and even
harmonizing research activities, and have made it possible to maintain research activities in countries going through a crisis.
Marie de Lattre-Gasquet is a researcher from the Centre de coopération internationale en recherche agronomique pour le développement
(CIRAD), in France. Within the external relations directorate of CIRAD, she has been responsible for the relationships between
CIRAD and international organizations. She has also actively participated in the preparation of CIRAD’s long-term strategy.
She worked for the International Service for National Agricultural Research (ISNAR) in The Netherlands from 1983 to 1985.
She holds a Master in International Management (AGSIM, Thunderbird Campus) and a Doctorate in Economy (Université de Paris
X).
He is mostly working on the agricultural research networks in sub-Saharan Africa. He holds a diploma from the Institut National
d’Agronomie—Paris Grignon. 相似文献
134.
135.
136.
Fran H. Norris Ph.D. Stanley A. Murrell 《American journal of community psychology》1988,16(5):665-683
As participants in a panel study, 234 older adults were interviewed before, as well as after, serious flooding occurred in southeastern Kentucky. Floods are not uncommon in this area, but these were more widespread than most, and resulted in both previously exposed and newly exposed subsamples of disaster victims. Flood impact was measured at both personal and community levels. With preflood symptoms controlled, there were modest flood effects on both trait anxiety and weather-specific distress in older adults without prior flood experience, but no flood effects in older adults who had been in floods before. Thus, the study provides support for the "inoculation hypothesis" and other conceptualizations that emphasize the advantage of being familiar or experienced with a stressor that is at hand. An implication is that "experienced" victims could be a valuable resource in prevention efforts. 相似文献
137.
Summary This experiment was designed to investigate the influence of a secondary attention-demanding force-production task on adaptation to prismatic displacement. Recent suggestions by Finke (1979) lead to the prediction that a secondary task executed during adaptation would interfere with the central component of adaptation (as measured by intermanual transfer), but not the peripheral component (adaptation specific to adapted limb). There were three secondary task conditions (no task, easy task, difficult task). Other factors investigated were: type of feedback (continuous, terminal), hand adapted (right, left) and prism orientation (base right, base left). While negative aftereffect was not influenced by the secondary task manipulation, intermanual transfer results provide partial support for Finke's model. Correlational analyses indicate the importance of task-specific parameters in determining the nature of perceptual-motor adaptation. 相似文献
138.
Ronald A. Cole Max Coltheart Fran Allard 《Quarterly journal of experimental psychology (2006)》1974,26(1):1-7
Subjects were presented with a sequence of two letters, each letter spoken in either a male or female voice. On each trial, the subject was required to indicate, as quickly as possible, whether the two letters had the same name. Reaction times (RTs) were faster for letters spoken in the same voice for both “same” and “different” responses, even when letters were separated by 8 s. These results are incompatible with the notion of physical and name codes in auditory memory since a “different” response should always be based on a comparison of letter names and should not be influenced by voice quality. It was also found that RTs were not influenced by the phonemic distinctive feature similarity of the letters. 相似文献
139.
140.
Pehlivan Seda Süner Ali Yıldırım Yasemin Fadıloğlu Çiçek 《Journal of religion and health》2018,57(4):1497-1508
Journal of Religion and Health - The study was conducted to determine the levels of usage of complementary and integrative health (CIH) approaches and the symptoms experienced by Turkish patients... 相似文献