全文获取类型
收费全文 | 1485篇 |
免费 | 46篇 |
国内免费 | 5篇 |
专业分类
管理学 | 38篇 |
民族学 | 5篇 |
人口学 | 16篇 |
丛书文集 | 74篇 |
理论方法论 | 38篇 |
综合类 | 561篇 |
社会学 | 37篇 |
统计学 | 767篇 |
出版年
2023年 | 7篇 |
2022年 | 7篇 |
2021年 | 12篇 |
2020年 | 24篇 |
2019年 | 48篇 |
2018年 | 42篇 |
2017年 | 86篇 |
2016年 | 29篇 |
2015年 | 33篇 |
2014年 | 58篇 |
2013年 | 258篇 |
2012年 | 144篇 |
2011年 | 72篇 |
2010年 | 72篇 |
2009年 | 49篇 |
2008年 | 75篇 |
2007年 | 70篇 |
2006年 | 79篇 |
2005年 | 86篇 |
2004年 | 57篇 |
2003年 | 57篇 |
2002年 | 48篇 |
2001年 | 49篇 |
2000年 | 28篇 |
1999年 | 4篇 |
1998年 | 9篇 |
1997年 | 5篇 |
1996年 | 3篇 |
1995年 | 6篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 3篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
排序方式: 共有1536条查询结果,搜索用时 15 毫秒
1.
A. M. Abd El-Raheem 《Journal of Statistical Computation and Simulation》2019,89(16):3075-3104
The generalized half-normal (GHN) distribution and progressive type-II censoring are considered in this article for studying some statistical inferences of constant-stress accelerated life testing. The EM algorithm is considered to calculate the maximum likelihood estimates. Fisher information matrix is formed depending on the missing information law and it is utilized for structuring the asymptomatic confidence intervals. Further, interval estimation is discussed through bootstrap intervals. The Tierney and Kadane method, importance sampling procedure and Metropolis-Hastings algorithm are utilized to compute Bayesian estimates. Furthermore, predictive estimates for censored data and the related prediction intervals are obtained. We consider three optimality criteria to find out the optimal stress level. A real data set is used to illustrate the importance of GHN distribution as an alternative lifetime model for well-known distributions. Finally, a simulation study is provided with discussion. 相似文献
2.
教学管理是教学工作运转的支柱,教学管理的优劣影响着教学质量。该文介绍了外语学院教学管理工作的基本内容,包括教学任务的布置落实、教学检查、教学文件的建设、学籍管理,以及结合学院的实际情况完善考试制度、制定成绩管理细则和考试结果奖励办法等。 相似文献
3.
笔者系统总结了我国城乡差距、城乡关系失调的具体表现,并进一步分析了城乡发展差距过大对国民经济和社会发展的影响以及统筹城乡发展的现实意义,继而从改革城乡分治的管理体制,加快城镇化进程,推动城乡联动的工业化路线等方面提出了统筹城乡发展的对策建议。 相似文献
4.
CHIN-TSANG CHIANG MEI-CHENG WANG CHIUNG-YU HUANG 《Scandinavian Journal of Statistics》2005,32(1):77-91
Abstract. Recurrent event data are largely characterized by the rate function but smoothing techniques for estimating the rate function have never been rigorously developed or studied in statistical literature. This paper considers the moment and least squares methods for estimating the rate function from recurrent event data. With an independent censoring assumption on the recurrent event process, we study statistical properties of the proposed estimators and propose bootstrap procedures for the bandwidth selection and for the approximation of confidence intervals in the estimation of the occurrence rate function. It is identified that the moment method without resmoothing via a smaller bandwidth will produce a curve with nicks occurring at the censoring times, whereas there is no such problem with the least squares method. Furthermore, the asymptotic variance of the least squares estimator is shown to be smaller under regularity conditions. However, in the implementation of the bootstrap procedures, the moment method is computationally more efficient than the least squares method because the former approach uses condensed bootstrap data. The performance of the proposed procedures is studied through Monte Carlo simulations and an epidemiological example on intravenous drug users. 相似文献
5.
Computing maximum likelihood estimates from type II doubly censored exponential data 总被引:1,自引:0,他引:1
Arturo J. fernández José I. Bravo Íñigo De Fuentes 《Statistical Methods and Applications》2002,11(2):187-200
It is well-known that, under Type II double censoring, the maximum likelihood (ML) estimators of the location and scale parameters, θ and δ, of a twoparameter exponential distribution are linear functions
of the order statistics. In contrast, when θ is known, theML estimator of δ does not admit a closed form expression. It is shown, however, that theML estimator of the scale parameter exists and is unique. Moreover, it has good large-sample properties. In addition, sharp
lower and upper bounds for this estimator are provided, which can serve as starting points for iterative interpolation methods
such as regula falsi. Explicit expressions for the expected Fisher information and Cramér-Rao lower bound are also derived.
In the Bayesian context, assuming an inverted gamma prior on δ, the uniqueness, boundedness and asymptotics of the highest
posterior density estimator of δ can be deduced in a similar way. Finally, an illustrative example is included. 相似文献
6.
Jerald F. Lawless 《Revue canadienne de statistique》2004,32(3):327-331
Oiler, Gomez & Calle (2004) give a constant sum condition for processes that generate interval‐censored lifetime data. They show that in models satisfying this condition, it is possible to estimate non‐parametrically the lifetime distribution based on a well‐known simplified likelihood. The author shows that this constant‐sum condition is equivalent to the existence of an observation process that is independent of lifetimes and which gives the same probability distribution for the observed data as the underlying true process. 相似文献
7.
市场调查:图书选题计划制定的关键 总被引:1,自引:0,他引:1
罗小卫 《重庆工商大学学报(社会科学版)》2003,20(6):150-151
加强市场调查对提高图书选题策划的预测准确性作用极大。市场导向和市场反馈,将直接有助于出版机构了解市场的饱和点、空白点、热点、增长点和萎缩点,正确判断图书市场的现状和未来走势,进而在制订选题计划时更为合理地进行因势利导和科学决策。 相似文献
8.
陈国先 《西华大学学报(哲学社会科学版)》2006,25(6):47-50
本文证明在定位资源的产出必须超过定额的约束下,最优产出模型的均衡条件是:资源资本(或劳动)的货币边际转换率e>1,而不是e=1。因此政府应实行资源定额与价格的管理政策,才会使中国“十一五”规划中的GDP年增7.5%、单位GDP资耗下降20%、居民年增收5%三者协同实现。 相似文献
9.
涂江红 《重庆大学学报(社会科学版)》2003,9(6):8-10
目前,市场竞争日趋激烈,税务筹划成为现代企业理财新思路.本文对常用方法以及应注意的若干方面进行探讨. 相似文献
10.
Yen Steven T. Douglass Shaw W. Eiswerth Mark E. 《Review of Economics of the Household》2004,2(1):73-88
Asthma patients' health status may be especially sensitive to some types of air pollution, but the evidence on this is mixed. We explore the effects of ground-level ozone on asthma patient's activities, breaking apart the usual aggregated category of leisure into indoor and outdoor activities, and differentiating those by whether the activities were active or inactive. Applying the semiparametric censored estimation method we demonstrate that even though the period over which activities were observed was relatively low in ozone levels, there is a significant impact of ozone on a few activities. The (non-ozone) economic and demographic variables in the model play significant roles in explaining the allocation of time among seven activities, suggesting the suitability of the approach for other household decision-making contexts. 相似文献