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71.
本文研究双重价格机制下经济系统的运行,建立了混合经济的价值理论,证明了竞争均衡的存在性,这一研究对于理解混合经济系统的运行有重要的意义。 相似文献
72.
学校教育与社会的日益结合是日益当代教育发展的最主要特点和趋势,学校体育与所在社区的有效结合是学校和社区的发展必然选择,学校体育也因此具有社区教育属性,表现为学校体育与社区教育的相容共通以及学校体育与社区体育的优势互补。学校体育在社区的发展过程中发挥指导功能并提高社区居民体育活动水平,价值导向功能以及对社区人文精神的促进几个主要功能。 相似文献
73.
《Journal of nonparametric statistics》2012,24(1):89-103
A competing risk type of model called the mixed hazards model is studied. This model differs from the usual competing risks in that the cause of failure can not be identified. Questions related to the identifiability of the model and to the uniqueness and support size of the maximum likelihood estimate of the mixing distribution are considered. A dual maximization problem results in a bound for the discrepancy of the log-likelihood from its maximum value. 相似文献
74.
This article discusses the problem of a fallible auditor who assesses the values of sampled records, but may make mistakes. To detect these mistakes, a subsample of the checked elements is checked again, now by an infallible expert. We propose a model for this kind of double check, which takes into account that records are often correct; however, if they are incorrect, the errors can take on many different values—as is often the case in audit practice. The model therefore involves error probabilities as well as distributional parameters for error sizes. We derive maximum likelihood estimators for these model parameters and derive from them an estimator for the mean size of the errors in the population. A simulation study shows that the latter outperforms some other—previously introduced—estimators. 相似文献
75.
The problem of estimation of parameters of a mixture of degenerate (at zero) and exponential distribution is considered by Jayade and Prasad (1990). The sampling scheme proposed in it is extended in this paper to a mixture of degenerate and Inverse Gaussian distribution. The Inverse Gaussian distribution is very relevant for studying reliability and life-testing problems. The inverse Gaussian being the first passage time distribution for Wiener process makes it particularly appropriate for failure or reaction time data analysis. 相似文献
76.
Birgit Debrabant 《统计学通讯:理论与方法》2013,42(19):3449-3467
Mixed Poisson processes are characterized by a well-known order statistic property: their occurrence times are distributed like ordinary uniform order statistics, given the state of the process at a certain time. We study a generalization of this property using a generalized model of ordered random variables, including a sequence of real parameters. 相似文献
77.
AbstractWhen the mixed chart proposed by Aslam et al. (2015) is in use, the sample items are classified as defective or not defective and, depending on the number of defectives, the quality characteristic X of the sample items are also measured. In this case, an Xbar chart decides the state of the process. The previous conforming/non-conforming classification truncates the X distribution and, because of that, the mathematical development to obtain the ARLs is complex. Aslam et al. (2015) didn’t pay attention to the fact that the X distribution is truncated and, due to that, they obtained incorrect ARLs. 相似文献
78.
Regression models that account for main state effects and nested county effects are considered for the assessment of farmland values. Empirical predictors obtained by replacing the unknown variances in the formulas of the optimal predictors by maximum likelihood estimates are presented. The computations are carried out by simple iterations between two SAS procedures. Estimators for the prediction variances are derived, and a modification to secure the robustness of the predictors is proposed. The procedure is applied to data on nonirrigated cropland in the Corn Belt states and is shown to yield predictors with considerably lower prediction mean squared errors than the survey estimators and other regression-type estimators. 相似文献
79.
Dong Joon Park 《统计学通讯:理论与方法》2013,42(13):2281-2291
In applications using a linear regression model with a balanced two-fold nested error structure, interest focuses on inferences concerning variability of the effects associated with the levels of nesting. This article proposes confidence intervals on the variance components associated with the primary and secondary levels in the model. In order to construct the confidence intervals we use a modified large sample method, generalized inference method, and Satterthwaite approximation. Computer simulation is performed to compare the proposed confidence intervals. A numerical example is provided to demonstrate the intervals. 相似文献
80.
ABSTRACTWe will design a new mixed acceptance sampling plan based on the exponentially weighted moving average statistic in this article. The plan parameters of the proposed plan are determined by an optimization problem. The efficiency of the proposed plan is compared with the existing attribute sampling plan. An industrial example is given for illustration purpose. 相似文献