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101.
程福德 《湖北师范学院学报(哲学社会科学版)》1994,(3)
本文用Melnikev方法研究超导中弱性Josephson结方程的动力学特性,指出了紊动产生的条件.方程为:d~2x/dt~2+a(dx/dt)+sinx=b+εlsinwtd~2x/dt~2+a(dx/dt)+sinx=b+ε[l_1sinw_1t+l_2sinw_2t] 相似文献
102.
This paper summarizes the literature on estimation and testing of present value relations. Twenty-four test statistics are illustrated and compared in a simulation experiment utilizing six different data generation models. The test statistics are calculated for actual Standard and Poor's 500 annual stock price and dividend data, and the results are interpreted in light of the Monte Carlo experiments. 相似文献
103.
104.
Trivellore E. Raghunathan 《Allgemeines Statistisches Archiv》2006,90(4):515-526
Despite advances in public health practice and medical technology, the disparities in health among
the various racial/ethnic and socioeconomic groups remain a concern which has prompted the Department
of Human and Health Services to designate the elimination of disparities in health as an overarching goal
of Healthy People 2010. To assess the progress towards this goal, suitable measures are needed at the population
level that can be tracked over time; Statistical inferential procedures have to be developed for these population
level measures; and the data sources have to be identified to allow for such inferences to be conducted.
Popular data sources for health disparities research are large surveys such the National Health and Interview
Survey (NHIS) or the Behavior Risk Factor Surveillance System (BRFSS). The self-report disease status collected
in these surveys may be inaccurate and the errors may be correlated with variables used in defining the
groups. This article uses the National Health and Nutritional Examination Survey (NHANES) 99-00 to assess
the extent of error in the self-report disease status; uses a Bayesian framework develop corrections
for the self-report disease status in the National Health Interview Survey (NHIS) 99-00; and compares inferences
about various measures of health disparities, with and without correcting for measurement error. The methodology
is illustrated using the disease outcome hypertension, a common risk factor for cardiovascular disease.
JEL classification C1 (C11, C13, C15), C4 (C42) and I3 (I31, I38) 相似文献
105.
The problem of consistent estimation of the slope parameter in an ultrastructural model with replicated observations is considered in this article. A consistent estimator based on a weighted arithmetic mean of two inconsistent least squares estimators is proposed which is independent of any unknown quantity. The efficiency properties of this estimator are studied. 相似文献
106.
107.
Guojun Wang 《统计学通讯:理论与方法》2013,42(15):2694-2713
We investigate certain objective priors for the parameters in a normal linear regression models with one of the explanatory variables subject to measurement error. We first show that the use of the standard non informative prior for normal linear regression without measurement error leads to an improper posterior in the measurement error model. We then derive the Jeffreys prior and reference priors, and show that they lead to proper posteriors. We use simulation study to compare the frequentist performance of the estimates derived using these priors, and the MLE. 相似文献
108.
Vassilly Voinov 《统计学通讯:理论与方法》2013,42(21):4622-4630
The Wald's method for constructing chi-squared tests of fit has been formulated more accurately. It is shown that Wald's type statistics will follow the central chi-squared distribution if and only if the limit covariance matrix of standardized frequencies will not depend on unknown parameters. Several examples that illustrate this important fact are presented. In particular, it is shown that the goodness-of-fit statistic developed by Moore and Stubblebine does not follow the chi-squared limit distribution, and, hence, cannot be used for testing multivariate normality. 相似文献
109.
Given a most believed value for a quantity together with upper and lower possible deviations from that value, a rectangular distribution might be used to represent state-of-knowledge about the quantity. If the deviations are themselves known by probability distributions, and the value conditioned on the deviations is rectangular, then the marginal distribution of the value is determined by the distributions of the deviations. Here we show under quite general conditions that conversely, given the marginal distribution, the distributions of the deviations are uniquely determined. The case in which the marginal distribution is trapezoidal is studied in some detail. 相似文献
110.