全文获取类型
收费全文 | 23636篇 |
免费 | 208篇 |
出版年
2023年 | 23篇 |
2022年 | 57篇 |
2021年 | 59篇 |
2020年 | 110篇 |
2019年 | 102篇 |
2018年 | 3584篇 |
2017年 | 2929篇 |
2016年 | 2368篇 |
2015年 | 325篇 |
2014年 | 237篇 |
2013年 | 583篇 |
2012年 | 748篇 |
2011年 | 2551篇 |
2010年 | 2586篇 |
2009年 | 1571篇 |
2008年 | 1838篇 |
2007年 | 2300篇 |
2006年 | 152篇 |
2005年 | 304篇 |
2004年 | 262篇 |
2003年 | 218篇 |
2002年 | 129篇 |
2001年 | 70篇 |
2000年 | 127篇 |
1999年 | 59篇 |
1998年 | 50篇 |
1997年 | 45篇 |
1996年 | 32篇 |
1995年 | 17篇 |
1994年 | 24篇 |
1993年 | 19篇 |
1992年 | 21篇 |
1991年 | 20篇 |
1990年 | 24篇 |
1989年 | 12篇 |
1988年 | 10篇 |
1987年 | 14篇 |
1984年 | 18篇 |
1983年 | 11篇 |
1982年 | 16篇 |
1980年 | 11篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 11篇 |
1975年 | 10篇 |
1972年 | 13篇 |
1971年 | 13篇 |
1970年 | 14篇 |
1969年 | 9篇 |
1967年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Olle Hellström 《Theoretical medicine and bioethics》1993,14(4):325-342
One of my main points in this study is that the knowledge of orthodox medical theory is an incomplete guide for practical action when relating to our patients' specifically human problems. By following a holistic perspective on patients' health and on our medical enterprise we will be more efficient as doctors. This standpoint is illuminated by means of two case reports. Instead of focusing on symptoms as such and letting them refer to orthodox medical theory, I explicitly relate to the patients as if they are conveying a personal meaning by means of experienced symptoms. The experience of illness could be a successful strategy on the existential level although destructive on the technical biological level. A holistic theory of health can give doctors a good conceptual base when relating to people whose presented illnesses are to be regarded explicitly as their way of making themselves understood. The doctor's understanding of the patient's illness, of the theory of health, and of how health is regained, is dependent on the doctor's having the courage to reduce the distance to the patient, the courage to participate and be changed. 相似文献
52.
This study was based on data from a longitudinal research program. The cohort consisted of 874 normal children in an entire school grade in a Swedish community. The aim of the study was to investigate the relation between birth weight and behavior at school, for all children and for each sex separately. The results identified specific aspects of behaviour disorder significantly related to low birth weight (LBW) for children at the age of 10 but not at the age of 13. When the sexes were separated, there were no relations between birth weight and deviant behaviour for boys of low birth weight as compared to boys of normal birth weight, while girls of low birth weight showed specific behavioural disorders at age 10 as compared to girls of normal birth weight. For girls reared in families of low parental socioeconomic status, aggressiveness and motor restlessness at age 10 but not at age 13 was also present. Further analyses showed that girls born small-for-gestational age showed lack of school motivation and concentration difficulties both at age 10 and age 13. 相似文献
53.
Rodger Beehler 《Studies in Philosophy and Education》1990,10(4):315-335
The essay examines the argument advanced by E.D. Hirsch, Jr., for instituting ‘cultural literacy’ as a fundamental priority of schools. A number of confusions and equivocations in Hirsch's reasoning are identified, and the propensity of his project to indoctrinate is exposed. Among the features of Hirsch's argument shown to be troubling are his shifting construal of ‘language’, his inconsistency about the requirements of cultural literacy, and his uncritical relation to traditional images of the American past and present. The upshot is to raise the question why Hirsch's project has elicited wide support and praise. 相似文献
54.
Proponents of the projection strategy take an epistemic rule for the evaluation of English conditionals, the Ramsey test, as clue to the truth-conditional semantics of conditionals. They also construe English conditionals as stronger than the material conditional. Given plausible assumptions, however, the Ramsey test induces the semantics of the material conditional. The alleged link between Ramsey test and truth conditions stronger than those of the material conditional can be saved by construing conditionals as ternary, rather than binary, propositional functions with a hidden contextual parameter. But such a ternary construal raises problems of its own. 相似文献
55.
Lars Nyberg Ulrich Olofsson John M. Gardiner Lars-Göran Nilsson 《Psychological research》1997,59(4):231-239
The purpose of this study was to assess retrieval strategy in incidental, intentional, and inclusion tests with word-fragment cues following a levels-of-processing manipulation at study. The results of Exp. 1 showed small levels-of-processing effects in incidental tests, and most subjects reported involuntary rather than voluntary retrieval of study-list words. In an intentional test, although levels of processing had a much greater effect, quite a few subjects also reported involuntary rather than voluntary retrieval of study-list words, and these subjects showed a smaller effect of levels of processing than subjects reporting voluntary retrieval. These results suggest that subjects given instructions for both voluntary and involuntary retrieval of study-list words in an inclusion test might not in fact attempt voluntary retrieval at all, but simply adopt an involuntary retrieval strategy. The results of Exp. 2 provided evidence to support this suggestion. The general implication is that where test contamination refers to subjects' failure to use retrieval strategies in accordance with test instructions, inclusion tests can be contaminated, as well as incidental or intentional tests, and that it is always necessary to obtain converging evidence about the actual strategies subjects use. 相似文献
56.
57.
58.
Jörg R. J. Schirra 《Kognitionswissenschaft》1997,6(4):177-195
How can we explain that an assertion on something perceived can be understood in the same manner by somebody who cannot perceive that scene? This problem bases the interest in computational linguistics in how listener modeling could possibly be harmonized with reference semantics. Mental images substituting real perception appear as a way out. The architecture of the listener model has to be adapted to the creation and use of such pictorial data structures. Furthermore, the relation between the latter and a verbal (i. e., propositional) representation must be understood. The resulting architecture of a listener model with reference semantics can be employed to solve communicational problems from three general classes in a better way, as is demonstrated by an example implementation. 相似文献
59.
Fifty-two patients with spider phobia, fulfilling the DSM-III-R criteria for simple phobia, were assessed with behavioral, physiological and self-report measures. They were randomly assigned to five different treatment conditions: (1) one session therapist-directed exposure (maximum 3 hours), (2) specific manual-based treatment in the home, (3) specific manual-based treatment at the clinic, (4) general manual-based treatment in the home and (5) general manual-based treatment at the clinic. The results show that therapist-directed one-session treatment was significantly more effective than three of the manual-based treatments, both at the post-treatment and follow-up stages. Specific manual-based treatment at the clinic was significantly more successful than the other manual-based treatments, but only at follow-up. The proportion of clinically significant improved patients at follow-up was 80% in the therapist-directed group compared to 63% for the specific manual-based treatment at the clinic, 10% for specific manual-based treatment in the home, 9% for general manual-based treatment in the home, and 10% for general manual-based treatment at the clinic. The conclusion that can be drawn is that one-session therapist-directed treatment is the treatment of choice for spider phobia but manual-based treatment is a good alternative in some cases. 相似文献
60.
GROUPING BY PROXIMITY AND MULTISTABILITY IN DOT LATTICES: 总被引:1,自引:0,他引:1
Abstract— Gestalt phenomena have long resisted quantification. In the spirit of Gestalt field theory, we propose a theory that predicts the probability of grouping by proximity in the six kinds of dot lattices (hexagonal, rhombic, square, rectangular, centered rectangular, and oblique). We claim that the unstable perceptual organization of dot lattices is caused by competing forces that attract each dot to other dots in its neighborhood. We model the decline of these forces as a function of distance with an exponential decay function. This attraction function has one parameter, the attraction constant Simple assumptions allow us to predict the entropy of the perceptual organization of different dot lattices. We showed dot lattices tachistoscopically to 7 subjects, and from the probabilities of the perceived organisations, we calculated the entropy of each lattice for each subject. The model fit the data exceedingly well. The attraction constant did not vary much over subjects 相似文献