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101.
Dogs can learn effectively to detour around a V-shaped fence after observing a demonstration from either an unfamiliar human
or dog demonstrator. We found earlier that there is substantial individual variation between the dogs’ performance, even when
using the same experimental conditions. Here, we investigate if the subjects’ relative dominance rank with other dogs had
an effect on their social learning performance. On the basis of the owners’ answers to a questionnaire, subjects from multi-dog
homes were sorted into groups of dominant and subordinate dogs. In Experiment 1, dominant and subordinate dogs were tested
without demonstration and we did not find any difference between the groups—they had similarly low detour performances on
their own. In Experiment 2 and 3, dogs from single dog and multi-dog households were tested in the detour task with demonstration
by an unfamiliar dog, or human, respectively. The results showed that social learning performance of the single dogs fell
between the dominant and subordinate multi-dogs with both dog and human demonstration. Subordinate dogs displayed significantly
better performance after having observed a dog demonstrator in comparison to dominant dogs. In contrast, the performance of
dominant and subordinate dogs was almost similar, when they observed a human demonstrator. These results suggest that perceived
dominance rank in its own group has a strong effect on social learning in dogs, but this effect seems to depend also on the
demonstrator species. This finding reveals an intricate organization of the social structure in multi-dog households, which
can contribute to individual differences existing among dogs. 相似文献
102.
Methods of incorporating a ridge type of regularization into partial redundancy analysis (PRA), constrained redundancy analysis
(CRA), and partial and constrained redundancy analysis (PCRA) were discussed. The usefulness of ridge estimation in reducing
mean square error (MSE) has been recognized in multiple regression analysis for some time, especially when predictor variables
are nearly collinear, and the ordinary least squares estimator is poorly determined. The ridge estimation method was extended
to PRA, CRA, and PCRA, where the reduced rank ridge estimates of regression coefficients were obtained by minimizing the ridge
least squares criterion. It was shown that in all cases they could be obtained in closed form for a fixed value of ridge parameter.
An optimal value of the ridge parameter is found by G-fold cross validation. Illustrative examples were given to demonstrate the usefulness of the method in practical data analysis
situations.
We thank Jim Ramsay for his insightful comments on an earlier draft of this paper. The work reported in this paper is supported
by Grants 10630 from the Natural Sciences and Engineering Research Council of Canada to the first author. 相似文献
103.
Michael Schrter 《The International journal of psycho-analysis》2004,85(1):159-177
Before the First World War, it had been taken for granted that psychoanalysis was carried out by doctors. The IPA, however, also included non‐physicians. This corresponded to Freud's view that psychoanalysis was a basic science (psychology of the unconscious) with manifold fields of application in medicine as well as in the humanities. It was for the latter application that Freud specifically recruited a number of researchers, e.g. Rank. After 1918, helped by a general boom in psychotherapy, these people too began to work as therapists. This led to a debate about lay analysis within the ‘Secret Committee’ that has so far received little attention and is one focus of this paper. Abraham had only allowed doctors to become members of his group. Similarly the Berlin Policlinic was established as a place for the postgraduate training of doctors. On the other hand, Freud (together with Rank) continued to maintain his broader view of psychoanalysis. In 1920/21, he already wished that analysts would not become a subgroup within the medical profession, but a profession of their own, defined by their special training. The big problem of the late 1920s, that different attitudes to the lay question threatened the autonomy of local or national groups and the integration of the IPA, also became visible at that early time in a conflict between London (Jones) and Vienna/Berlin. 相似文献
104.
当代民众信仰状况与社会安定意识相关研究 总被引:6,自引:0,他引:6
信仰是个人深层的、稳定的行为导向体系,是人的精神世界的核心。本研究根据信仰的内容,将信仰划分为物质信仰、精神信仰、伦理信仰、国家社会信仰和宗教神灵信仰。从天津市选取不同职业、不同年龄段的被试745名,对他们的信仰状况与社会安定意识状况进行调查研究,结果表明:民众的社会安定意识与其物质、宗教神灵信仰有非常显著的负相关,与其精神、国家社会信仰有非常显著的正相关。多元回归分析结果表明:影响社会安定意识的因素为保障制度不健全、对挫折的不良反应、社会治安状况差、官员腐败、分配不公、责任外归因。 相似文献
105.
探索性因素分析在测验编制中局限性的模拟实验 总被引:6,自引:0,他引:6
本文主要用模拟研究的方法,通过生成拟合优度验证性因素分析的数据,来考察探索性因素分析在测验编制中的局限性。结果表明探索性因素分析作为纯数据基础上的一种统计方法,在因素问相关程度较大时.得到与理论假设不一致的结论。本文还就测验中会聚效度的一些限制作了初步探讨,结合具体情况介绍了中等相关限定条件的实质。 相似文献
106.
In this paper we study the interrelationships between two sets of data measured on the same subjects via redundancy analysis.
We consider redundancy analysis from an inferential point of view. Under the hypothesis of multinormality, tests of significance
are obtained for each successive redundancy component so that only the significant factors are retained for prediction purposes.
An example illustrates the method.
The authors would like to thank the Editor and the referees for their helpful comments. This research has been partly financed
by NSERC (Canada). 相似文献
107.
采用理想点方法检验生活取向测验及其修订版的单维性 总被引:2,自引:1,他引:1
该文从项目反应过程出发,认为可能是由于原有的维度分析方法将生活取向测验(LOT)及其修订版(LOT-R)这两个测验的项目反应理想点过程错误地限定为优势过程,导致两个测验违背单维性的结论;进而采用主成分分析的未旋转成分负荷散点图和对应分析的维度分数散点图,并结合项目相关矩阵法验证LOT和LOT-R的维度。结果显示LOT-R的单维性得到了验证,LOT由于包含两个测量应对的项目而导致违背单维性。最后作者提出应该与理想点过程相一致的心理计量学模型对LOT-R的数据进行分析。 相似文献
108.
The use of surrogate weights based on rankings has been proposed as a method for avoiding difficulties associated with the elicitation of weights in multi‐attribute decision analysis. When the simple multiattribute rating technique using swings (SMARTS) method is being employed it has been suggested that rank order centroid (ROC) weights are the best surrogate weights to use. This study shows that ROC weights are appropriate to use as a substitute for original weights that are constrained to sum to a fixed total (usually 1 or 100) as used in the point allocation method. If, however, the original weights are determined without any initial restrictions, as in the direct rating method, and are then normalized, which is the common procedure in SMARTS analysis, then the ROC weights do not provide the best approximations to the original weights. This paper shows how to obtain rank order distribution (ROD) weights that provide a better approximation than the ROC approach to unrestricted original weights. The paper also shows that, as the number of attributes in a decision problem increases, the ROD weights approximate to the more easily calculated rank sum weights. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
109.
道德和法律的关系,是体现现代性本质的一个核心问题。“德法次序”概念,可以将日常德治和法治关系的探讨,纳入到具有普遍性的政治哲学框架中来,实现一种现代政治哲学叙事。 相似文献
110.
Wim P. Krijnen 《Psychometrika》1994,59(2):269-270
De Vries (1993) discusses Pearson's product-moment correlation, Spearman's rank correlation, and Kendall's rank-correlation coefficient for assessing the association between the rows of two proximity matrices. For each of these he introduces a weighted average variant and a rowwise variant. In this note it is shown that for all three types, the absolute value of the first variant is greater than or equal to the absolute value of the second.The author is obliged to Frits E. Zegers for useful comments on an earlier version of this paper. 相似文献