全文获取类型
收费全文 | 1525篇 |
免费 | 35篇 |
国内免费 | 5篇 |
专业分类
管理学 | 76篇 |
人口学 | 7篇 |
丛书文集 | 13篇 |
理论方法论 | 18篇 |
综合类 | 240篇 |
社会学 | 12篇 |
统计学 | 1199篇 |
出版年
2024年 | 1篇 |
2023年 | 10篇 |
2022年 | 10篇 |
2021年 | 13篇 |
2020年 | 28篇 |
2019年 | 53篇 |
2018年 | 54篇 |
2017年 | 94篇 |
2016年 | 38篇 |
2015年 | 42篇 |
2014年 | 37篇 |
2013年 | 416篇 |
2012年 | 155篇 |
2011年 | 39篇 |
2010年 | 43篇 |
2009年 | 49篇 |
2008年 | 34篇 |
2007年 | 34篇 |
2006年 | 37篇 |
2005年 | 46篇 |
2004年 | 30篇 |
2003年 | 30篇 |
2002年 | 26篇 |
2001年 | 27篇 |
2000年 | 29篇 |
1999年 | 32篇 |
1998年 | 32篇 |
1997年 | 17篇 |
1996年 | 16篇 |
1995年 | 22篇 |
1994年 | 12篇 |
1993年 | 11篇 |
1992年 | 10篇 |
1991年 | 7篇 |
1990年 | 8篇 |
1989年 | 5篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 1篇 |
1978年 | 2篇 |
排序方式: 共有1565条查询结果,搜索用时 15 毫秒
101.
Mathias Raschke 《统计学通讯:模拟与计算》2017,46(9):6879-6888
We reveal that the minimum Anderson–Darling (MAD) estimator is a variant of the maximum likelihood method. Furthermore, it is shown that the MAD estimator offers excellent opportunities for parameter estimation if there is no explicit formulation for the distribution model. The computation time for the MAD estimator with approximated cumulative distribution function is much shorter than that of the classical maximum likelihood method with approximated probability density function. Additionally, we research the performance of the MAD estimator for the generalized Pareto distribution and demonstrate a further advantage of the MAD estimator with an issue of seismic hazard analysis. 相似文献
102.
Ravindra Khattree 《统计学通讯:理论与方法》2013,42(1):263-274
In this paper, estimates QP dispersion matrix and its functions are compared based on generalized Pitman nearness criterion, Various Iosa functions are considered for the purpose. Locally superior estimates are defined and obtained. Comparison of these estimates are made with other standard ones. It is snown that within certain classes, defined in the paper, these are the best estimatcrs ia the generalized Fitman nearness sense 相似文献
103.
科学元原则的动摇与后科学时代 总被引:2,自引:0,他引:2
王建华 《南京大学学报(哲学.人文科学.社会科学 )》2000,(6)
科学是按“元原则→公理体系→数学与逻辑方法→具体科学→具体科学技术、工程等的应用”的程式完成其建构的。通过对这一程式的静态分析,可发现科学本身的真理性(即科学性)是值得怀疑的;科学一元论的统治也是值得怀疑的。这种怀疑,使我们看到了后科学时代的曙光。 相似文献
104.
基于CARIMA模型和ARMAX模型的广义预测控制算法是两类基本的GPC算法,给出了它们的统一格式,对GPC算法的理论分析和实际应用有意义。 相似文献
105.
赵林 《佛山科学技术学院学报(社会科学版)》1995,(4)
把定义在半直线R+=[0,∞)上概率测度的广义卷积推广到了紧空间R+=[0,∞]上.讨论了与连续性、单位元有关的性质.根据单位元的可能性,导出了两类广义卷积,研究了它们之间的关系.比较了本文所用的推广方法与Urbanik的推广方法之间的联系. 相似文献
106.
A system of predictors for estimating a finite population variance is defined and shown to be asymptotically design-unbiased (ADU) and asymptotically design-consistent (ADC) under probability sampling. An asymptotic mean squared error (MSE) of a generalized regression-type predictor, generated from the system, is obtained. The suggested predictor attains the minimum expected variance of any design-unbiased estimator when the superpopulation model is correct. The generalized regression-type predictor and the predictor suggested by Mukhopadhyay (1990) are compared. 相似文献
107.
Summary: Wald statistics in generalized linear models are asymptotically 2 distributed.
The asymptotic chi–squared law of the corresponding quadratic form shows disadvantages
with respect to the approximation of the finite–sample distribution. It is shown by means
of a comprehensive simulation study that improvements can be achieved by applying
simple finite–sample size approximations to the distribution of the quadratic form in
generalized linear models. These approximations are based on a 2 distribution with an
estimated degree of freedom that generalizes an approach by Patnaik and Pearson. Simulation studies confirm that nominal level is maintained with higher accuracy compared
to the Wald statistics. 相似文献
108.
This paper deals with the construction of optimum partitions
of
for a clustering criterion which is based on a convex function of the class centroids
as a generalization of the classical SSQ clustering criterion for n data points. We formulate a dual optimality problem involving two sets of variables and derive a maximum-support-plane (MSP) algorithm for constructing a (sub-)optimum partition as a generalized k-means algorithm. We present various modifications of the basic criterion and describe the corresponding MSP algorithm. It is shown that the method can also be used for solving optimality problems in classical statistics (maximizing Csiszárs
-divergence) and for simultaneous classification of the rows and columns of a contingency table. 相似文献
109.
Covariates and Random Effects in a Gamma Process Model with Application to Degradation and Failure 总被引:7,自引:0,他引:7
The gamma process is a natural model for degradation processes in which deterioration is supposed to take place gradually over time in a sequence of tiny increments. When units or individuals are observed over time it is often apparent that they degrade at different rates, even though no differences in treatment or environment are present. Thus, in applying gamma-process models to such data, it is necessary to allow for such unexplained differences. In the present paper this is accomplished by constructing a tractable gamma-process model incorporating a random effect. The model is fitted to some data on crack growth and corresponding goodness-of-fit tests are carried out. Prediction calculations for failure times defined in terms of degradation level passages are developed and illustrated. 相似文献
110.
In this paper we consider semiparametric inference methods for the time scale parameters in general time scale models (Oakes, 1995, Duchesne and Lawless, 2000). We use the results of Robins and Tsiatis (1992) and Lin and Ying (1995) to derive a rank-based estimator that is more efficient and robust than the traditional minimum coefficient of variation (min CV) estimator of Kordonsky and Gerstbakh (1993) for many underlying models. Moreover, our estimator can readily handle censored samples, which is not the case with the min CV method. 相似文献