全文获取类型
收费全文 | 447篇 |
免费 | 5篇 |
国内免费 | 1篇 |
专业分类
管理学 | 17篇 |
人口学 | 1篇 |
丛书文集 | 4篇 |
理论方法论 | 3篇 |
综合类 | 110篇 |
社会学 | 5篇 |
统计学 | 313篇 |
出版年
2022年 | 4篇 |
2021年 | 1篇 |
2020年 | 4篇 |
2019年 | 13篇 |
2018年 | 9篇 |
2017年 | 14篇 |
2016年 | 13篇 |
2015年 | 11篇 |
2014年 | 15篇 |
2013年 | 140篇 |
2012年 | 30篇 |
2011年 | 18篇 |
2010年 | 9篇 |
2009年 | 17篇 |
2008年 | 13篇 |
2007年 | 9篇 |
2006年 | 10篇 |
2005年 | 13篇 |
2004年 | 9篇 |
2003年 | 8篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 4篇 |
1999年 | 7篇 |
1998年 | 6篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 5篇 |
1992年 | 6篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 4篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有453条查询结果,搜索用时 31 毫秒
121.
CBN刀精车GCr15轴承钢的试验研究 总被引:1,自引:0,他引:1
本文利用正交试验法,通过用CBN刀对GCr15轴承钢精车切削试验并对试验数据进行了多元线性处理,得出了在此切削条件下的切削用量三因素与刀具耐用度的Taylor公式,为解决难加工材料GCr15轴承钢的精车及实际生产提供了经验。 相似文献
122.
A. H. Welsh & Elvizio Ronchetti 《Journal of the Royal Statistical Society. Series B, Statistical methodology》1998,60(2):413-428
We discuss the problem of estimating finite population parameters on the basis of a sample containing representative outliers. We clarify the motivation for Chambers's bias-calibrated estimator of the population total and show that bias calibration is a key idea in constructing estimators of finite population parameters. We then link the problem of estimating the population total to distribution function or quantile estimation and explore a methodology based on the use of Chambers's estimator. We also propose methodology based on the use of robust estimates and a bias-calibrated form of the Chambers and Dunstan estimator of the population distribution function. This proposal leads to a bias-calibrated estimator of the population total which is an alternative to that of Chambers. We present a small simulation study to illustrate the utility of these estimators. 相似文献
123.
参数未知的房地产投资系统混沌同步 总被引:1,自引:0,他引:1
针对经济增长系统参数未知时,房地产投资驱动系统与经济增长响应系统的同步问题,基于Lya-punov稳定性理论和自适应控制方法,给出了两系统渐近同步的一个充分条件和自适应控制律。数值模拟验证了控制策略的有效性。 相似文献
124.
Dose proportionality/linearity is a desirable property in pharmacokinetic studies. Various methods have been proposed for its assessment. When dose proportionality is not established, it is of interest to evaluate the degree of departure from dose linearity. In this paper, we propose a measure of departure from dose linearity and derive an asymptotic test under a repeated measures incomplete block design using a slope approach. Simulation studies show that the proposed method has a satisfactory small sample performance in terms of size and power. 相似文献
125.
126.
This paper proposes tests for equality of intercepts of two simple regression models when non sample prior information is available on the equality of two slopes. For three different scenarios on the values of the slope, namely (i) unknown (unspecified), (ii) known (specified), and (iii) suspected, we derive the unrestricted test (UT), restricted test (RT), and pre-test test (PTT) for testing the equality of intercepts. The test statistics, their sampling distributions, and power functions of the tests are obtained. Comparison of power function and size of the tests reveals that the PTT has a reasonable dominance over the UT and RT. 相似文献
127.
Gwangsu Kim 《Journal of the Korean Statistical Society》2019,48(1):146-168
The estimation of random effects in frailty models is an important problem in survival analysis. Testing for the presence of random effects can be essential to improving model efficiency. Posterior consistency in dispersion parameters and coefficients of the frailty model was demonstrated in theory and simulations using the posterior induced by Cox’s partial likelihood and simple priors. We also conducted simulation studies to test for the presence of random effects; the proposed method performed well in several simulations. Data analysis was also conducted. The proposed method is easily tractable and can be used to develop various methods for Bayesian inference in frailty models. 相似文献
128.
Andrs Ramírez‐Hassan Manuel Correa‐Giraldo 《Australian & New Zealand Journal of Statistics》2019,61(3):360-379
Central to many inferential situations is the estimation of rational functions of parameters. The mainstream in statistics and econometrics estimates these quantities based on the plug‐in approach without consideration of the main objective of the inferential situation. We propose the Bayesian Minimum Expected Loss (MELO) approach focusing explicitly on the function of interest, and calculating its frequentist variability. Asymptotic properties of the MELO estimator are similar to the plug‐in approach. Nevertheless, simulation exercises show that our proposal is better in situations characterised by small sample sizes and/or noisy data sets. In addition, we observe in the applications that our approach gives lower standard errors than frequently used alternatives when data sets are not very informative. 相似文献
129.
X. L. Hu P. Castagliola A. A. Tang 《Journal of Statistical Computation and Simulation》2019,89(13):2468-2488
In practice, different practitioners will use different Phase I samples to estimate the process parameters, which will lead to different Phase II control chart's performance. Researches refer to this variability as between-practitioners-variability of control charts. Since between-practitioners-variability is important in the design of the CUSUM median chart with estimated process parameters, the standard deviation of average run length (SDARL) will be used to study its properties. It is shown that the CUSUM median chart requires a larger amount of Phase I samples to sufficiently reduce the variation in the in-control ARL of the CUSUM median chart. Considering the limitation of the amount of the Phase I samples, a bootstrap approach is also used here to adjust the control limits of the CUSUM median chart. Comparisons are made for the CUSUM and Shewhart median charts with estimated parameters when using the adjusted- and unadjusted control limits and some conclusions are made. 相似文献
130.
In this paper, some recent and classical tests of symmetry are modified for the case of an unknown centre. The unknown centre is estimated with its α-trimmed mean estimator. The asymptotic behaviour of the new tests is explored. The local approximate Bahadur efficiency is used to compare the tests to each other as well as to some other tests. 相似文献