全文获取类型
收费全文 | 11172篇 |
免费 | 224篇 |
国内免费 | 67篇 |
专业分类
管理学 | 349篇 |
劳动科学 | 2篇 |
民族学 | 73篇 |
人才学 | 1篇 |
人口学 | 57篇 |
丛书文集 | 710篇 |
理论方法论 | 174篇 |
综合类 | 4540篇 |
社会学 | 92篇 |
统计学 | 5465篇 |
出版年
2024年 | 5篇 |
2023年 | 35篇 |
2022年 | 62篇 |
2021年 | 75篇 |
2020年 | 138篇 |
2019年 | 219篇 |
2018年 | 262篇 |
2017年 | 437篇 |
2016年 | 220篇 |
2015年 | 243篇 |
2014年 | 384篇 |
2013年 | 2177篇 |
2012年 | 759篇 |
2011年 | 497篇 |
2010年 | 455篇 |
2009年 | 482篇 |
2008年 | 508篇 |
2007年 | 593篇 |
2006年 | 560篇 |
2005年 | 538篇 |
2004年 | 501篇 |
2003年 | 467篇 |
2002年 | 380篇 |
2001年 | 374篇 |
2000年 | 239篇 |
1999年 | 133篇 |
1998年 | 123篇 |
1997年 | 95篇 |
1996年 | 65篇 |
1995年 | 90篇 |
1994年 | 64篇 |
1993年 | 53篇 |
1992年 | 50篇 |
1991年 | 24篇 |
1990年 | 24篇 |
1989年 | 32篇 |
1988年 | 17篇 |
1987年 | 16篇 |
1986年 | 7篇 |
1985年 | 6篇 |
1984年 | 17篇 |
1983年 | 11篇 |
1982年 | 6篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1977年 | 1篇 |
1976年 | 3篇 |
1975年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
Martin Hazelton 《Statistics and Computing》1995,5(4):343-350
Some statistical models defined in terms of a generating stochastic mechanism have intractable distribution theory, which renders parameter estimation difficult. However, a Monte Carlo estimate of the log-likelihood surface for such a model can be obtained via computation of nonparametric density estimates from simulated realizations of the model. Unfortunately, the bias inherent in density estimation can cause bias in the resulting log-likelihood estimate that alters the location of its maximizer. In this paper a methodology for radically reducing this bias is developed for models with an additive error component. An illustrative example involving a stochastic model of molecular fragmentation and measurement is given. 相似文献
92.
93.
《Australian & New Zealand Journal of Statistics》2002,44(3):381-384
Books reviewed:
R.J. Adler, R.E. Feldman & M.S. Taqqu, A Practical Guide to Heavy Tails: Statistical Techniques and Applications.
J.J. Foste, A Beginner's Guide to Data Analysis Using SPSS for Windows.
N. Limnios and G. Oprisan, Semi–Markov Processes and Reliability. 相似文献
R.J. Adler, R.E. Feldman & M.S. Taqqu, A Practical Guide to Heavy Tails: Statistical Techniques and Applications.
J.J. Foste, A Beginner's Guide to Data Analysis Using SPSS for Windows.
N. Limnios and G. Oprisan, Semi–Markov Processes and Reliability. 相似文献
94.
依法执政或依法行政,作为执政方式最为直接、最为具体的基本实践环节或途径,在相当范围内反映着科学执政、民主执政的实现程度。这取决于《行政许可法》不打折扣地坚决实施,政府的依法执政职能方式从重管制向重服务转变;职能范围从“全能”向“有限”回归;职能性质由“专断”走向真正“民主”;职能习惯从主观随意转向严格的法治。 相似文献
95.
一些恒等式在函数论、组合数学、解析数论等学科的研究领域中极为重要。以二项式作为生成函数,给出了几个组合恒等式证明。 相似文献
96.
Current status data arise when the death of every subject in a study cannot be determined precisely, but is known only to have occurred before or after a random monitoring time. The authors discuss the analysis of such data under semiparametric linear transformation models for which they propose a general inference procedure based on estimating functions. They determine the properties of the estimates they propose for the regression parameters of the model and illustrate their technique using tumorigenicity data. 相似文献
97.
文章根据专业学习和技能培训的关系,设计了本科教学的机械设计技能培训模块,为培养大学生的设计技能提供了一个实践平台。 相似文献
98.
C. L. Sheng 《Theory and Decision》1989,26(2):175-195
This paper clarifies and interprets some basic quantitative concepts of value, utility and utility function from a utilitarian point of view. First, I discuss the question as to whether value is objective or subjective. I hold that value is subjective and statistical in nature (although from the various subjective values of a certain object a norm can usually be obtained). Second, I emphasize the distinction between use value and exchange value in relation to utility. Third, I propose a law of diminishing incremental interest, which refers to the incremental (marginal) utility of money. Fourth, I identify the utility of money with the von Neumann-Morgenstern utility. Fifth, I question the necessity of the usual normalization of utility functions and the restricted linear transformation (and the consequent concept of strategic equivalence). Sixth, I discuss in detail the terminal values and utilities of a utility function from a philosophical rather than mathematical point of view, particularly the boundedness of a utility function and the magnitudes of V
0 and U
0. Finally, I conclude that, in order to be able to have interpersonal comparisons of utility, utility should have the same dimension as value rather than no dimension, and the normalization problem should be reconsidered in the light of terminal values and utilities. 相似文献
99.
本文主要探讨了脉冲光源光函数的测试方法,着重介绍了利用频谱分析仪,采用比对法测试闪光型救生衣灯光函数的过程. 相似文献
100.
Approximation of a density by another density is considered in the case of different dimensionalities of the distributions. The results have been derived by inverting expansions of characteristic functions with the help of matrix techniques. The approximations obtained are all functions of cumulant differences and derivatives of the approximating density. The multivariate Edgeworth expansion follows from the results as a special case. Furthermore, the density functions of the trace and eigenvalues of the sample covariance matrix are approximated by the multivariate normal density and a numerical example is given 相似文献