全文获取类型
收费全文 | 1500篇 |
免费 | 41篇 |
国内免费 | 15篇 |
专业分类
管理学 | 182篇 |
民族学 | 8篇 |
人口学 | 24篇 |
丛书文集 | 49篇 |
理论方法论 | 27篇 |
综合类 | 576篇 |
社会学 | 49篇 |
统计学 | 641篇 |
出版年
2024年 | 1篇 |
2023年 | 8篇 |
2022年 | 12篇 |
2021年 | 14篇 |
2020年 | 24篇 |
2019年 | 42篇 |
2018年 | 55篇 |
2017年 | 67篇 |
2016年 | 32篇 |
2015年 | 34篇 |
2014年 | 54篇 |
2013年 | 221篇 |
2012年 | 64篇 |
2011年 | 57篇 |
2010年 | 53篇 |
2009年 | 48篇 |
2008年 | 60篇 |
2007年 | 60篇 |
2006年 | 58篇 |
2005年 | 63篇 |
2004年 | 62篇 |
2003年 | 43篇 |
2002年 | 25篇 |
2001年 | 64篇 |
2000年 | 50篇 |
1999年 | 39篇 |
1998年 | 40篇 |
1997年 | 32篇 |
1996年 | 31篇 |
1995年 | 34篇 |
1994年 | 21篇 |
1993年 | 18篇 |
1992年 | 14篇 |
1991年 | 9篇 |
1990年 | 8篇 |
1989年 | 9篇 |
1988年 | 13篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1979年 | 3篇 |
1976年 | 3篇 |
1975年 | 1篇 |
排序方式: 共有1556条查询结果,搜索用时 15 毫秒
61.
C.C. Heyde 《Journal of statistical planning and inference》1996,50(3):373-378
This paper illustrates the use of quasi-likelihood methods of inference for hidden Markov random fields. These are simple to use and can be employed under circumstances where only the model form and its covariance structure are specified. In particular they can be used to derive the same estimating equations as the E-M algorithm or change of measure methods, which make full distributional assumptions. 相似文献
62.
63.
Bo He 《Journal of applied statistics》2009,36(8):835-852
We develop an autoregressive integrated moving average (ARIMA) model to study the statistical behavior of the numerical error generated from three fourth-order ordinary differential equation solvers: Milne's method, Adams–Bashforth method and a new method that randomly switches between the Milne and Adams–Bashforth methods. With the actual error data based on three differential equations, we desire to identify an ARIMA model for each data series. Results show that some of the data series can be described by ARIMA models but others cannot. Based on the mathematical form of the numerical error, other statistical models should be investigated in the future. Finally, we assess the multivariate normality of the sample mean error generated by the switching method. 相似文献
64.
Ernest Gonzales Lisa A. Marchiondo Jing Tan Yi Wang Huajuan Chen 《Journal of gerontological social work》2017,60(3):245-254
ABSTRACTThe Aging Semantic Differential (ASD) is the most widely used instrument to measure young people’s attitudes towards older adults. This study translated the ASD to Mandarin and examined its psychometric properties. The Mandarin-ASD contains three latent factors (Personality and Mental Health, Societal Participation, and Physical) that have high internal reliability and reasonable discriminate validity. Social work researchers, practitioners and allied professionals may utilize the ASD-Mandarin instrument to measure young people’s attitudes towards older adults in China. We issue a call for a universal-ASD that can be applied across different cultural contexts. 相似文献
65.
In this paper, we propose a new partial correlation, the so-called composite quantile partial correlation, to measure the relationship of two variables given other variables. We further use this correlation to screen variables in ultrahigh-dimensional varying coefficient models. Our proposed method is fast and robust against outliers and can be efficiently employed in both single index variable and multiple index variable varying coefficient models. Numerical results indicate the preference of our proposed method. 相似文献
66.
A generalization of Zellner's SUR model is derived for sets of seemingly unrelated systems of econometric equations. The resulting structural form – worked out for a set of Cowles Commission-type simultaneous equations systems – is general enough to include any SUR-type or panel-type specification of systems of econometric equations with contemporaneously correlated errors. Maximum estimation efficiency is obtained by treating all the individual subsystems at once rather than in a subsystem-by-subsystem fashion. 相似文献
67.
This paper addresses the collinearity problems in semi-parametric linear models. Under the difference-based settings, we introduce a new diagnostic, the difference-based variance inflation factor (DVIF), for detecting the presence of multicollinearity in semi-parametric models. The DVIF is then used to device a difference-based matrix perturbation method for solving the problem. The electricities distribution data set is analyzed, and numerical evidences validate the effectiveness of the proposed method. 相似文献
68.
Yasutaka Shimizu 《Scandinavian Journal of Statistics》2017,44(4):951-988
Consider a process satisfying a stochastic differential equation with unknown drift parameter, and suppose that discrete observations are given. It is known that a simple least squares estimator (LSE) can be consistent but numerically unstable in the sense of large standard deviations under finite samples when the noise process has jumps. We propose a filter to cut large shocks from data and construct the same LSE from data selected by the filter. The proposed estimator can be asymptotically equivalent to the usual LSE, whose asymptotic distribution strongly depends on the noise process. However, in numerical study, it looked asymptotically normal in an example where filter was chosen suitably, and the noise was a Lévy process. We will try to justify this phenomenon mathematically, under certain restricted assumptions. 相似文献
69.
70.
This paper discusses the regression analysis of current status failure time data arising from the additive hazards model with auxiliary covariates. As often occurs in practice, it is impossible or impractical to measure the exact magnitude of covariates for all subjects in a study. To compensate the missing information, some auxiliary covariates are utilized instead. We propose two easy-to-implement procedures for estimation of regression parameters by making use of auxiliary information. The asymptotic properties of the resulting estimators are established and extensive numerical studies indicate that both procedures work well in practice. 相似文献