全文获取类型
收费全文 | 1184篇 |
免费 | 26篇 |
国内免费 | 3篇 |
专业分类
管理学 | 65篇 |
人口学 | 13篇 |
丛书文集 | 18篇 |
理论方法论 | 27篇 |
综合类 | 167篇 |
社会学 | 4篇 |
统计学 | 919篇 |
出版年
2024年 | 1篇 |
2023年 | 6篇 |
2022年 | 5篇 |
2021年 | 12篇 |
2020年 | 16篇 |
2019年 | 41篇 |
2018年 | 30篇 |
2017年 | 60篇 |
2016年 | 31篇 |
2015年 | 25篇 |
2014年 | 38篇 |
2013年 | 334篇 |
2012年 | 98篇 |
2011年 | 45篇 |
2010年 | 44篇 |
2009年 | 36篇 |
2008年 | 33篇 |
2007年 | 39篇 |
2006年 | 26篇 |
2005年 | 39篇 |
2004年 | 33篇 |
2003年 | 15篇 |
2002年 | 25篇 |
2001年 | 21篇 |
2000年 | 23篇 |
1999年 | 17篇 |
1998年 | 13篇 |
1997年 | 17篇 |
1996年 | 10篇 |
1995年 | 8篇 |
1994年 | 11篇 |
1993年 | 7篇 |
1992年 | 7篇 |
1991年 | 8篇 |
1990年 | 6篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1976年 | 1篇 |
1975年 | 3篇 |
排序方式: 共有1213条查询结果,搜索用时 17 毫秒
61.
In this article, we present a new efficient iteration estimation approach based on local modal regression for single-index varying-coefficient models. The resulted estimators are shown to be robust with regardless of outliers and error distributions. The asymptotic properties of the estimators are established under some regularity conditions and a practical modified EM algorithm is proposed for the new method. Moreover, to achieve sparse estimator when there exists irrelevant variables in the index parameters, a variable selection procedure based on SCAD penalty is developed to select significant parametric covariates and the well-known oracle properties are also derived. Finally, some numerical examples with various distributed errors and a real data analysis are conducted to illustrate the validity and feasibility of our proposed method. 相似文献
62.
63.
Zachary Zimmer 《统计学通讯:模拟与计算》2017,46(7):5836-5845
This article explores the calculation of tolerance limits for the Poisson regression model based on the profile likelihood methodology and small-sample asymptotic corrections to improve the coverage probability performance. The data consist of n counts, where the mean or expected rate depends upon covariates via the log regression function. This article evaluated upper tolerance limits as a function of covariates. The upper tolerance limits are obtained from upper confidence limits of the mean. To compute upper confidence limits the following methodologies were considered: likelihood based asymptotic methods, small-sample asymptotic methods to improve the likelihood based methodology, and the delta method. Two applications are discussed: one application relating to defects in semiconductor wafers due to plasma etching and the other examining the number of surface faults in upper seams of coal mines. All three methodologies are illustrated for the two applications. 相似文献
64.
65.
Sherzod B. Akhundjanov 《统计学通讯:理论与方法》2017,46(10):4977-5000
In this article, we study exponentially weighted moving average (EWMA) control schemes to monitor the multivariate Poisson distribution with a general covariance structure, so that the practitioner can simultaneously monitor multiple correlated attribute processes more effectively. The statistical performance of the charts is assessed in terms of the run length properties and compared against other mainstream attribute control schemes. The application of the proposed methods to real-life and simulated datasets is demonstrated. 相似文献
66.
以英国学术英语口语语料库(BASE)中关于lecture和seminar两个主题和情景的话语为语料,建立相对应的汉语语料库,基于Halliday系统功能语法中的情态理论,从情态量值的角度对比英汉学术口语语体中的情态分布特征.研究发现:(1)情态在英汉学术口语中的分布存在显著性差异;(2)英汉两种语言都倾向于使用情态的肯定形式,较少用否定形式;(3)英语学术口语更倾向使用低、中量值的情态词,而汉语学术口语则多使用低、高量值的情态词;(4)英语学术口语的高频情态词分布不均衡,较多地使用了低量值情态词can,而汉语的高频情态词分布相对集中,没有表现出过多使用某个情态词的特点. 相似文献
67.
高校“大学生机会型创业”教育体系研究——以浙江省为例 总被引:1,自引:0,他引:1
本文在分析机会型创业推进模型和创业外部环境因素的基础上,提出了构建高校大学生机会型创业教育矩阵模型,并对完善我国高校大学生机会型创业教育教学提出建议和对策。 相似文献
68.
针对具有非线性和不稳定性的时间序列,提出一种结合经验模态分解(EMD)、有向可见图(DVG)网络的动态预测模型。利用经验模态分解将原时间序列分解为多个固有模态函数(IMF),然后对分解后的高频和低频IMF利用快速傅里叶变换得到各自的周期;依据每个周期,从原时间序列的尾部截取长短不一的子序列,然后采用有向可见图算法转换为多个有向网络,利用随机游走在每个有向网络中寻找与时间序列最后一个节点相似的节点;最后,依据平行线法,预测时间序列的下一个数值。原油价格的时间序列是一类典型的具有非线性和不稳定性的序列,利用此模型对WTI原油每日价格进行实证分析。研究结果表明,此模型不但可以有效地预测时间序列的变化趋势,而且具有较高的预测精度。 相似文献
69.
GEIR STORVIK 《Scandinavian Journal of Statistics》2011,38(2):342-358
Abstract. Use of auxiliary variables for generating proposal variables within a Metropolis–Hastings setting has been suggested in many different settings. This has in particular been of interest for simulation from complex distributions such as multimodal distributions or in transdimensional approaches. For many of these approaches, the acceptance probabilities that are used turn up somewhat magic and different proofs for their validity have been given in each case. In this article, we will present a general framework for construction of acceptance probabilities in auxiliary variable proposal generation. In addition to showing the similarities between many of the proposed algorithms in the literature, the framework also demonstrates that there is a great flexibility in how to construct acceptance probabilities. With this flexibility, alternative acceptance probabilities are suggested. Some numerical experiments are also reported. 相似文献
70.
This study treats an asymptotic distribution for measures of predictive power for generalized linear models (GLMs). We focus on the regression correlation coefficient (RCC) that is one of the measures of predictive power. The RCC, proposed by Zheng and Agresti is a population value and a generalization of the population value for the coefficient of determination. Therefore, the RCC is easy to interpret and familiar. Recently, Takahashi and Kurosawa provided an explicit form of the RCC and proposed a new RCC estimator for a Poisson regression model. They also showed the validity of the new estimator compared with other estimators. This study discusses the new statistical properties of the RCC for the Poisson regression model. Furthermore, we show an asymptotic normality of the RCC estimator. 相似文献