全文获取类型
收费全文 | 19902篇 |
免费 | 1487篇 |
国内免费 | 302篇 |
专业分类
21691篇 |
出版年
2024年 | 163篇 |
2023年 | 286篇 |
2022年 | 276篇 |
2021年 | 384篇 |
2020年 | 630篇 |
2019年 | 670篇 |
2018年 | 646篇 |
2017年 | 795篇 |
2016年 | 773篇 |
2015年 | 489篇 |
2014年 | 697篇 |
2013年 | 2125篇 |
2012年 | 522篇 |
2011年 | 577篇 |
2010年 | 448篇 |
2009年 | 718篇 |
2008年 | 907篇 |
2007年 | 942篇 |
2006年 | 813篇 |
2005年 | 691篇 |
2004年 | 585篇 |
2003年 | 506篇 |
2002年 | 459篇 |
2001年 | 271篇 |
2000年 | 261篇 |
1999年 | 222篇 |
1998年 | 176篇 |
1997年 | 145篇 |
1996年 | 123篇 |
1995年 | 108篇 |
1994年 | 102篇 |
1993年 | 81篇 |
1992年 | 63篇 |
1991年 | 45篇 |
1990年 | 50篇 |
1988年 | 41篇 |
1987年 | 26篇 |
1985年 | 372篇 |
1984年 | 420篇 |
1983年 | 349篇 |
1982年 | 449篇 |
1981年 | 444篇 |
1980年 | 444篇 |
1979年 | 395篇 |
1978年 | 446篇 |
1977年 | 352篇 |
1976年 | 354篇 |
1975年 | 274篇 |
1974年 | 278篇 |
1973年 | 237篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
整体汉字字形识别过程探索 总被引:6,自引:0,他引:6
本研究用微观发生范式探索了整体汉字和人工字的字形识别过程 ,主要获得以下结果 :1真字和人工字的正确提取率随呈现时间增长而提高 ,字形刺激的特征提取是一个有序的发展过程 ,字形识别加工受字特性 (真字与人工字 )和笔划数因素影响。2在以“十”为骨架和以“囗”为包围结构的字刺激中经常首先提取“十”或“囗”,而且首特征“十”或“囗”的提取不受字形熟悉性影响 ;笔划数变量仅对含“十”特征的字刺激的首特征提取产生影响。3在以上两类汉字中 ,“十”或“囗”作为首特征提取促进了字形识别加工过程。 相似文献
932.
Shifra Sagy Eliahu Stern Shaul Krakover 《American journal of community psychology》1996,24(5):657-676
This study examines macro and micro factors influencing the development of sense of community (Davidson & Cotter, 1980) in
two different populations (immigrants and veterans) in new temporary neighborhoods in Israel. At the macrolevel, the major
factors examined were population size, population density, number of dwelling units in the site, urbanity of the area, ethnic
heterogeneity, and peripheriality of the region. Three kinds of variables were examined on the microlevel: (a) personal attitudes:
evaluation of the dwelling unit and satisfaction with public services; (b) social networks; and (c) sociodemographic characteristics.
Data were collected from 242 immigrants from the former USSR and from 60 Israeli veterans, residing in 5 different sites.
Two different patterns of predictors of sense of community emerged in the two different samples. In the veteran sample, only
one macrolevel variable entered the stepwise analysis equation: the number of dwelling units in the site. In the immigrant
sample, three significant microlevel factors entered the equation: evaluation of the dwelling unit, external network, and
age. The data thus suggest that the major determinant factors underlying sense of community vary for different groups of people.
The paper is based on a study initiated and financed by the Ministry of Housing and Construction, the Unit of Social Policy,
Israel. 相似文献
933.
Ehlen S. J. Peter 《Studies in East European Thought》1996,48(1):83-108
A. F. Losev, one of the most important Russian philosophers and historians of ancient aesthetics and culture in the 20th century,
develops in his ‘Dialectics of the Myth’ (Dialektika mifa), 1930, a personalistic ontology by using elements of neoplatonic philosophy and Orthodox Christian belief. According to
Losev reality in all its different expressions and ontological strata must be understood as “mythical”, i.e. as “living mutual
exchange of subject and object”. The subjective and personal aspect of reality is not grounded in man’s epistemic relation
to it alone; reality in itself has to be characterized as personal and subjective. The main philosophical opponent is Descartes,
the founder of “modern rationalism and mechanism”.
相似文献
934.
Edward A. Wise 《Journal of psychopathology and behavioral assessment》1996,18(1):71-82
A review of the literature resulted in 21 published studies that reported mean MMPI profile patterns for PTSD patients. Of these, six (29%) reported that the mean 8-2 profile pattern significantly differentiated PTSD patients from non-PTSD patients. The majority of studies found additional PTSD profile patterns reflecting nearly all of the MMPI clinical scales. The data indicate some common group profile patterns for inpatient veterans, prisoner's of war, and inpatient veteran substance abusers. The results also support the hypothesis that there is a continuum from inpatient to outpatient and veteran to civilian populations that corresponds with both symptom and stressor severity. It is concluded that although there is some typicality in similar populations, clinicians should expect heterogeneous MMPI profiles from PTSD patients representing a diversity of clinical symptoms and styles. 相似文献
935.
936.
A questionnaire study involving white collar workers (n=48) investigated the effects of the threat of retaliation, seriousness of malpractice and occupational status of the observer on the likelihood and method of whistle-blowing chosen. In line with previous whistle-blowing and bystander intervention research, the likelihood of whistle-blowing was greater for serious malpractices and where threatened retaliation was low. The effect of retaliation was only significant for serious white collar malpractices and in every situation internal whistle-blowing was more likely than external. The general likelihood of whistle-blowing was positively correlated with the perception that reporting the malpractice would result in change. 相似文献
937.
DAVID J. HARPER 《Journal of community & applied social psychology》1996,6(4):249-265
In this article it is argued that the attributional literature concerning explanations of poverty is inadequate due to its theoretical presuppositions. It is proposed that a discursive approach is better able to withstand criticism and contribute to a more adequate understanding of poverty accounts. Some examples are given of how a discursive approach might work in practice. 相似文献
938.
Multiple-criteria decision aid almost always requires the use of weights, importance coefficients or even a hierarchy of criteria, veto thresholds, etc. These are importance parameters that are used to differentiate the role devoted to each criterion in the construction of comprehensive preferences. Many researchers have studied the problem of how to assign values to such parameters, but few of them have tried to analyse in detail what underlies the notion of importance of criteria and to give a clear formal definition of it. In this paper our purpose is to define a theoretical framework so as to analyse the notion of the importance of criteria under very general conditions. Within this framework it clearly appears that the importance of criteria is taken into account in very different ways in various aggregation procedures. This framework also allows us to shed new light on fundamental questions such as: Under what conditions is it possible to state that one criterion is more important than another? Are importance parameters of the various aggregation procedures dependent on or independent of the encoding of criteria? What are the links between the two concepts of the importance of criteria and the compensatoriness of preferences? This theoretical framework seems to us sufficiently general to ground further research in order to define theoretically valid elicitation methods for importance parameters. 相似文献
939.
本文运用个案研究方法 ,从人类理性的角度分析了企业在不同的生产经营条件下的目标设置方式 ,发现不确定性和目标难度对管理者的目标设置过程有很大的影响。在确定的 ,且任务较容易的情况下 ,目标设置是以一种与理性期望模型相一致的方式进行的 ,而在高度不确定的条件下 ,管理者则倾向于采用渐进适应的模式设置目标。对管理者的经营活动作进一步深入的分析发现 ,在高难度的任务目标情景中 ,决策者更多地从战略的层次 ,而不是从具体的层次上寻求实现目标的途径 ,从而提出了目标难度与实绩的“策略搜索层次”假设 相似文献
940.
William Stout 《Psychometrika》1987,52(4):589-617
Assuming a nonparametric family of item response theory models, a theory-based procedure for testing the hypothesis of unidimensionality of the latent space is proposed. The asymptotic distribution of the test statistic is derived assuming unidimensionality, thereby establishing an asymptotically valid statistical test of the unidimensionality of the latent trait. Based upon a new notion of dimensionality, the test is shown to have asymptotic power 1. A 6300 trial Monte Carlo study using published item parameter estimates of widely used standardized tests indicates conservative adherence to the nominal level of significance and statistical power averaging 81 out of 100 rejections for examinee sample sizes and psychological test lengths often incurred in practice.The referees' comments were remarkably detailed and greatly enhanced the writeup and sensitized the author to certain pertinent issues. Discussions with Fritz Drasgow, Lloyd Humphreys, Dennis Jennings, Brian Junker, Robert Linn, Ratna Nandakumar, and Robin Shealy were also very useful.This research was supported by the Office of Naval Research under grant N00014-84-K-0186; NR 150-533, and by the National Science Foundation under grant DMS 85-03321. 相似文献