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排序方式: 共有169条查询结果,搜索用时 15 毫秒
101.
This paper discusses method for constructing the prediction intervals for time series model with trend using the sieve bootstrap procedure. Gasser–Müller type of kernel estimator is used for trend estimation and prediction. The boundary modification of the kernel is applied to control the edge effect and to construct the predictor of a trend. 相似文献
102.
Koczkodaj Waldemar W. Mazurek Mirosław Strzałka Dominik Wolny-Dominiak Alicja Woodbury-Smith Marc 《Social indicators research》2019,141(2):861-871
Social Indicators Research - This study presents compelling social indicators of such magnitude that they cannot be ignored. The statistical evidence shows that data breaches of electronic health... 相似文献
103.
AbstractWe study the almost sure convergence of weighted sums of ratios of independent random variables satisfying some general, mild conditions. The obtained results are applied to exact laws for order statistics. An exact law for independent random variables which are nonidentically distributed is also proved and applied to ratios of adjacent order statistics for a sample of uniformly distributed random variables. 相似文献
104.
Mikołajczak Paweł 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2020,31(3):472-483
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Social enterprises have gained wide recognition as a tool for solving social and environmental problems. They generate new... 相似文献
105.
Paweł Marcin Kozyra 《Statistics》2018,52(1):177-204
We describe a method of determining upper bounds on the variances of linear combinations of the kth records values from i.i.d. sequences, expressed in terms of variances of parent distributions. We also present conditions for which the bounds are sharp, and those for which the respective lower ones are equal to zero. A special attention is paid to the case of the kth record spacings, i.e. the differences of consecutive kth record values. 相似文献
106.
Krista Byers-Heinlein Rachel Ka-Ying Tsui Daan van Renswoude Alexis K. Black Rachel Barr Anna Brown Marc Colomer Samantha Durrant Anja Gampe Nayeli Gonzalez-Gomez Jessica F. Hay Mikołaj Hernik Marianna Jartó Ágnes Melinda Kovács Alexandra Laoun-Rubenstein Casey Lew-Williams Ulf Liszkowski Liquan Liu Claire Noble Christine E. Potter Joscelin Rocha-Hidalgo Nuria Sebastian-Galles Melanie Soderstrom Ingmar Visser Connor Waddell Stephanie Wermelinger Leher Singh 《Infancy》2021,26(1):4-38
Determining the meanings of words requires language learners to attend to what other people say. However, it behooves a young language learner to simultaneously encode relevant non-verbal cues, for example, by following the direction of their eye gaze. Sensitivity to cues such as eye gaze might be particularly important for bilingual infants, as they encounter less consistency between words and objects than monolingual infants, and do not always have access to the same word-learning heuristics (e.g., mutual exclusivity). In a preregistered study, we tested the hypothesis that bilingual experience would lead to a more pronounced ability to follow another's gaze. We used a gaze-following paradigm developed by Senju and Csibra (Current Biology, 18, 2008, 668) to test a total of 93 6- to 9-month-old and 229 12- to 15-month-old monolingual and bilingual infants, in 11 laboratories located in 8 countries. Monolingual and bilingual infants showed similar gaze-following abilities, and both groups showed age-related improvements in speed, accuracy, frequency, and duration of fixations to congruent objects. Unexpectedly, bilinguals tended to make more frequent fixations to on-screen objects, whether or not they were cued by the actor. These results suggest that gaze sensitivity is a fundamental aspect of development that is robust to variation in language exposure. 相似文献
107.
The problem of Bayesian and robust Bayesian estimation with some bounded and asymmetric loss function ABL is considered for various models. The prior distribution is not exactly specified and covers the conjugate family of prior distributions. The posterior regret, most robust and conditional Γ-minimax estimators are constructed and a preliminary comparison with square-error loss and LINEX loss is presented. 相似文献
108.
109.
Małgorzata Wojtyś 《统计学通讯:理论与方法》2013,42(17):3082-3098
110.
The spectral measure plays a key role in the statistical modeling of multivariate extremes. Estimation of the spectral measure is a complex issue, given the need to obey a certain moment condition. We propose a Euclidean likelihood-based estimator for the spectral measure which is simple and explicitly defined, with its expression being free of Lagrange multipliers. Our estimator is shown to have the same limit distribution as the maximum empirical likelihood estimator of Einmahl and Segers (2009). Numerical experiments suggest an overall good performance and identical behavior to the maximum empirical likelihood estimator. We illustrate the method in an extreme temperature data analysis. 相似文献