全文获取类型
收费全文 | 1001篇 |
免费 | 31篇 |
专业分类
管理学 | 171篇 |
民族学 | 8篇 |
人口学 | 134篇 |
丛书文集 | 10篇 |
理论方法论 | 86篇 |
综合类 | 35篇 |
社会学 | 430篇 |
统计学 | 158篇 |
出版年
2023年 | 6篇 |
2022年 | 2篇 |
2021年 | 13篇 |
2020年 | 25篇 |
2019年 | 32篇 |
2018年 | 49篇 |
2017年 | 55篇 |
2016年 | 46篇 |
2015年 | 20篇 |
2014年 | 32篇 |
2013年 | 174篇 |
2012年 | 36篇 |
2011年 | 52篇 |
2010年 | 46篇 |
2009年 | 41篇 |
2008年 | 39篇 |
2007年 | 33篇 |
2006年 | 25篇 |
2005年 | 29篇 |
2004年 | 25篇 |
2003年 | 16篇 |
2002年 | 35篇 |
2001年 | 15篇 |
2000年 | 16篇 |
1999年 | 19篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 11篇 |
1995年 | 7篇 |
1994年 | 13篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1990年 | 8篇 |
1989年 | 5篇 |
1988年 | 9篇 |
1987年 | 6篇 |
1986年 | 6篇 |
1985年 | 6篇 |
1984年 | 4篇 |
1983年 | 10篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1975年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 2篇 |
排序方式: 共有1032条查询结果,搜索用时 218 毫秒
151.
In this paper a specification strategy is proposed for the determination of the orders in ARMA models. The strategy is based on two newly defined concepts: the q-conditioned partial auto-regressive function and the p-conditioned partial moving average function. These concepts are similar to the generalized partial autocorrelation function which has been recently suggested for order determination. The main difference is that they are defined and employed in connection with an asymptotically efficient estimation method instead of the rather inefficient generalized Yule-Walker method. The specification is performed by using sequential Wald type tests. In contrast to the traditional testing of hypotheses, these tests use critical values which increase with the sample size at an appropriate rate 相似文献
152.
The paper investigates random processes of geometrical objects in Euclidean spaces. General properties of the measure of total projections are derived by means of Palm distribution. Explicit formulas for variances of the projection measure are obtained for Poisson point processes of compact sets. Intensity estimators of fibre (surface) processes are then studied by means of projection measures. Classification of direct and indirect probes is introduced. The indirect sampling design of vertical sections and projections is generalized and its statistical properties derived. 相似文献
153.
Alessandro Di Bucchianico Jan Friso Groote Kees Van Hee Ronald Kruidhof 《统计学通讯:模拟与计算》2013,42(2):346-359
Common software release procedures based on statistical techniques try to optimize the trade-off between further testing costs and costs due to remaining errors. We propose new software release procedures where the aim is to certify with a certain confidence level that the software does not contain errors. The underlying model is a discrete time model similar to the geometric Moranda model. The decisions are based on a mix of classical and Bayesian approaches to sequential testing and do not require any assumption on the initial number of errors. 相似文献
154.
Linda P. Dekker Kirsten Visser Esther J.M. van der Vegt Athanasios Maras Jan van der Ende Nouchka T. Tick Frank C. Verhulst Kirstin Greaves‐Lord 《Journal of research on adolescence》2020,30(2):487-501
The private nature of psychosexual functioning leads adolescents and their parents to have different perspectives, which highlights studying parent–child informant discrepancies in this domain. We investigated informant discrepancy in psychosexual functioning, using the self‐report and parent report versions of the Teen Transition Inventory (TTI), of adolescents with autism spectrum disorder (ASD; 136 parent–child dyads) compared to adolescents from the general population (GP; 70 parent–child dyads). Significantly larger informant discrepancies exist in ASD dyads than GP dyads in most domains of psychosexual functioning, except for Body image, Sexual behavior, and Confidence in the future. It is important to use and pay attention to both informants, as discrepancies are relevant for both research and clinical practice regarding psychosexual functioning. 相似文献
155.
Sanne P. A. Rasing Marloes W. G. Braam Steven M. Brunwasser Jan M. A. M. Janssens Daan H. M. Creemers Ron H. J. Scholte 《Journal of research on adolescence》2020,30(1):298-313
Parental psychopathology and parenting behavior are known to be related to adolescents depression and anxiety, but unique roles of mothers and fathers are not clear. Our aim was to examine the relation of maternal and paternal psychopathology, emotional support, and respect for autonomy, and their interaction to depression and anxiety symptoms in adolescents. In total, 142 female adolescents participated, together with 138 mothers and 113 fathers. Data were analyzed using latent growth curve modeling. Paternal emotional support was negatively related to adolescent baseline level of depression and anxiety symptoms. Further, we found that there was a positive association between respect for autonomy and depression symptoms in adolescents for higher levels of paternal symptoms of psychological problems. 相似文献
156.
Loes G. M. van Rijsewijk Tom A. B. Snijders Jan Kornelis Dijkstra Christian Steglich Ren Veenstra 《Journal of research on adolescence》2020,30(1):63-77
The aim of this study was to unravel the interrelatedness of friendship and help, and to examine the characteristics of friendship and help networks. The effects of mutual versus one‐sided help relations on friendship initiation and maintenance, and vice versa, were examined. Friendship and help networks were analyzed (N = 953 students; 41 classrooms; Mage = 12.7). The results illustrate that friendship and help networks show some similarities, but only partly overlap and have distinct characteristics. Longitudinal multiplex social network analyses showed that mutual help was important for the maintenance of friendship, but not for the initiation of friendship. Further, particularly mutual friendships provided a context in which help took place. Implications of these findings are discussed. 相似文献
157.
ABSTRACTWeb surveys are an established data collection mode that use written language to provide information. The written language is accompanied by visual elements, such as presentation formats and shapes. However, research has shown that visual elements influence response behavior because respondents sometimes use interpretive heuristics to make sense of the visual elements. One such heuristic is the ‘left and top means first’ (LTMF) heuristic, which suggests that respondents tend to believe that a response scale consistently runs from left to right or from top to bottom. We conducted a web survey experiment to investigate how violations of the LTMF heuristic affect response behavior and data quality. For this purpose, a random half of respondents received response options that followed a consistent order and the other half received response options that followed an inconsistent order. The results reveal significantly different response distributions between the two groups. We also found that inconsistently ordered response options significantly increase response times and decrease data quality in terms of criterion validity. We, therefore, recommend using options that follow the design strategies of the LTMF heuristic. 相似文献
158.
159.
In this paper, we revisit the construction of confidence intervals for extreme quantiles of Pareto-type distributions. A novel asymptotic pivotal quantity is proposed for these quantile estimators, which leads to new asymptotic confidence intervals that exhibit more accurate coverage probability. This pivotal quantity also allows for the construction of a saddle-point approximation, from which a second set of new confidence intervals follows. The small-sample properties and utility of these confidence intervals are studied using simulations and a case study from insurance. 相似文献
160.
Jan Lust 《Globalizations》2019,16(7):1232-1246
ABSTRACTThe Peruvian economy depends for its growth on the export of its mineral resources. The core of the current economic development model is the export of the country's commodities and a free and (relatively) unregulated functioning of the markets. We argue that the continuity of the country's extractive development model is the consequence of the interplay between the objective and subjective conditions of Peruvian capitalist development. The analysis of the objective conditions is focused on the role of the country in the international division of labour, the relation between this role and the country’s economic and business structure, and the functionality of the extractive development model for the Peruvian State. In the case of the subjective conditions, the strength of the political Left, the labour movement and the social movements against mining capital are analyzed 相似文献