全文获取类型
收费全文 | 5104篇 |
免费 | 657篇 |
国内免费 | 626篇 |
出版年
2024年 | 14篇 |
2023年 | 102篇 |
2022年 | 114篇 |
2021年 | 165篇 |
2020年 | 280篇 |
2019年 | 282篇 |
2018年 | 225篇 |
2017年 | 314篇 |
2016年 | 322篇 |
2015年 | 204篇 |
2014年 | 254篇 |
2013年 | 785篇 |
2012年 | 185篇 |
2011年 | 219篇 |
2010年 | 179篇 |
2009年 | 254篇 |
2008年 | 307篇 |
2007年 | 277篇 |
2006年 | 257篇 |
2005年 | 237篇 |
2004年 | 203篇 |
2003年 | 180篇 |
2002年 | 163篇 |
2001年 | 124篇 |
2000年 | 107篇 |
1999年 | 98篇 |
1998年 | 71篇 |
1997年 | 56篇 |
1996年 | 41篇 |
1995年 | 49篇 |
1994年 | 54篇 |
1993年 | 32篇 |
1992年 | 25篇 |
1991年 | 31篇 |
1990年 | 25篇 |
1989年 | 20篇 |
1988年 | 23篇 |
1987年 | 11篇 |
1986年 | 10篇 |
1985年 | 12篇 |
1984年 | 17篇 |
1983年 | 5篇 |
1982年 | 8篇 |
1981年 | 6篇 |
1980年 | 13篇 |
1979年 | 9篇 |
1978年 | 6篇 |
1977年 | 6篇 |
1976年 | 5篇 |
1975年 | 1篇 |
排序方式: 共有6387条查询结果,搜索用时 0 毫秒
31.
32.
Edward O. Wilson 《Zygon》1990,25(3):245-262
Abstract. The sciences may be conceptualized as a hierarchy ranked by level of organization (e.g., many-body physics ranks above particle physics). Each science serves as an antidiscipline for the science above it; that is, between each pair, tense but creative interplay is inevitable. Biology has advanced through such tension between its subdisciplines and now can serve as an antidiscipline for the social sciences—for anthropology, for example, by examining the connection between cultural and biological evolution; for psychology, by addressing the nature of learning and the structure of the unconscious; for economics, by examining economically irrational behavior and by comparing economic activity in humans and other species. Sociology, concerned mainly with advanced literate societies, is relatively remote from the genetic basis of human social behavior. However, moving between biological and social levels of organization generates richness and points to new and unexpected principles. 相似文献
33.
Timothy J. Trull Eric Hillerbrand 《Journal of psychopathology and behavioral assessment》1990,12(4):285-297
Normative data for the Fear Questionnaire (Marks & Mathews, 1979), a popular self-report instrument measuring phobic concerns, were collected from both a community and a collegiate sample. The covariation and internal consistency of the blood-injury phobia (BI), social phobia (SO), and agoraphobia (AG) subscales were assessed in each sample, and the factor structure of the items from these three subscales was examined. Results indicated that, in general, community subjects reported more phobic concerns than did collegiate subjects, and females reported greater phobic concerns than did males. Results from confirmatory factor analyses suggest that the three factors of BI, SO, and AG did not emerge from either data set. Follow-up exploratory factor analyses did identify the general factors of blood-injury phobia and agoraphobia. Normative data from the present study are compared to those obtained previously, and directions for future research are provided. 相似文献
34.
Kimary N. Shahin 《Argumentation》1990,4(3):347-361
Problems with regard to the analysis of argumentative partly discourse arise from definitorial disconformity. In this article, Informal argument is taken as the primary definition to study the basic structure of argument from a fragment of an Agatha Christie novel. Bilmes' account of the notions of Formulation (F) and Decision (D+/D-) are adapted to describe the relations of opposition which are displayed in informal argument. The minimal structure of argument is represented by the formula F/D-/D-, in which F is a speaker's personal composition of a fact, the first D- is the disconfirming uptake of it by another speaker and the second D- is the completing disconfirming uptake by the initial speaker. Some of the speaker's possibilities to initiate an argument by expressing a Formulation are explored, as well as the social and cultural norms which play a role in argument-initiation and the concepts of win and loss. 相似文献
35.
该文较系统地论述了孟子的普通心理思想。主要问题是:心理学思想的基本观点,知虑心理思想,情欲心理思想,志意心理思想,智能心理思想,性习心理思想。 相似文献
36.
从情绪描述看青少年期到成人期认知结构的发展 总被引:1,自引:0,他引:1
该研究依据研究者制定的认知发展水平评价系统,对年龄范围在13—55岁之间的90名被试关于生气、害怕、伤心、高兴四种情绪的自我描述进行了评价分析。结果表明,青少年期的思维具有形式化、外在、抽象等特点,成人期的思维具有内在、具体、形象等特点,前者具有刻板性、封闭性,后者具有灵活性、开放性。 相似文献
37.
人类颜色视觉的计算理论 总被引:2,自引:0,他引:2
该文有机地结合了计算视觉理论和生态学视觉理论,指出颜色信息处理的根本任务是检测环境中的光不变量。在此基础上,作者提出了颜色视觉的计算理论以及计算理论本身的生物学标准。初级视觉计算是典型的不适定问题,动物的视觉系统则利用视环境中存在的条件将该不适定问题转化为定解问题。本文引入颜色视觉计算的免要条件,客观性约束,以及颜色认知的神经表象,证明了上述约束下颜色算法的存在性。本文给出了构造颜色知觉的基本假设。同时,该文还讨论了与上述问题密切相关的几个基本问题:神经表象的完备性,主观色觉的客观性,明度知觉和颜色知觉的统一,人类主观色觉的实现方式。 相似文献
38.
39.
40.
How do people go about choosing between alternatives in relatively simple settings? This study explores some of the variables that past work suggests may be relevant. Volunteer subjects worked for money in six procedures in which the probability of a payment from either of two alternatives was 1.0, but the rate of pay (i.e. the speed with which a payment was delivered or the size of the payment) interacted with the subjects recent allocation of choices, which we define as the ‘internalities’. Because of the internalities, choosing the currently more profitable alternative did not maximize total earnings. Subjects were more likely to fail to maximize when the interaction between present pay and past choices was spread over longer sequences of choices, or when the reward variable was the speed, rather than the value, of each payment. Subjects often disregarded the internalities and were instead guided by the current yields of the two alternatives, which is a frequently observed tendency, called ‘melioration’, in experiments on choices by animals. The tendency toward melioration was only partially counteracted by explicit instructions on how to maximize earnings. We discuss a theoretical framework for melioration that postulates both motivational and cognitive sources. 相似文献