全文获取类型
收费全文 | 465篇 |
免费 | 15篇 |
国内免费 | 4篇 |
专业分类
管理学 | 72篇 |
民族学 | 1篇 |
人口学 | 4篇 |
丛书文集 | 13篇 |
理论方法论 | 11篇 |
综合类 | 135篇 |
社会学 | 2篇 |
统计学 | 246篇 |
出版年
2023年 | 5篇 |
2022年 | 1篇 |
2021年 | 4篇 |
2020年 | 6篇 |
2019年 | 16篇 |
2018年 | 23篇 |
2017年 | 25篇 |
2016年 | 9篇 |
2015年 | 12篇 |
2014年 | 19篇 |
2013年 | 82篇 |
2012年 | 30篇 |
2011年 | 17篇 |
2010年 | 17篇 |
2009年 | 10篇 |
2008年 | 18篇 |
2007年 | 20篇 |
2006年 | 18篇 |
2005年 | 18篇 |
2004年 | 21篇 |
2003年 | 14篇 |
2002年 | 9篇 |
2001年 | 19篇 |
2000年 | 15篇 |
1999年 | 5篇 |
1998年 | 8篇 |
1997年 | 8篇 |
1996年 | 7篇 |
1995年 | 6篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1979年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有484条查询结果,搜索用时 953 毫秒
431.
Motivated by the papers of Woodward and Gray (1979) and Gray, Kelly and McIntire (1978) on the R and S array approach to ARMA modeling, the authors show that the R and S array algorithm is completely equivalent to Levinson recursion. Since entries in the R and S array can be computed by either algorithm, the equivalence provides greater insight into the R and S methodology as well as its links to Akaike's AIC or FPE. Numerical simulations serve to highlight the differences between the various approaches as well as illustrate the problems associated with exact methods. The K and S array approach is shown to be an effective procedure for determining ARMA model orders. 相似文献
432.
Abstract High frequency data have become an important feature of many areas of research. They permit the creation of estimators in highly non‐parametric classes of continuous‐time models. In the context of continuous semi‐martingale models, we here provide a locally parametric ‘double Gaussian’ approximation, to facilitate the analysis of estimators. As in Mykland and Zhang (Econometrica, 77, 2009, p. 1403), the error in the approximation can be offset with a postasymptotic likelihood correction. The current approximation is valid in large neighbourhoods, permitting a sharp analysis of estimators that use local behaviour over asymptotically increasing numbers of observations. 相似文献
433.
434.
时间序列分析就是通过研究时间序列中数值上的统计关系,来揭示系统的动态结构特征及其发展变化规律,是一种重要的现代统计分析方法,广泛地应用于自然领域、社会领域的科学研究和思维。在时间序列变量建模的过程中,一般分为模型识别、模型估计和诊断以及模型预测三个步骤,其中模 相似文献
435.
研究了一类非线性时滞偏微分方程 解的振动性,其中(x,t)∈Ω×(0,∞),是具有逐片光滑边界的有界区域,得到了方程所有解振动的充分条件。 相似文献
436.
Let x ≥ 0 and n ≥ 2 be integers. Suppose there exists an orthogonal array of strength 2 in n symbols with q rows and columns where , and d is a positive integer. Then d is called the deficiency of the orthogonal array. The question of embedding such an array into a complete array is considered for the case d ≥ 3. It is shown that for d = 3 such an embedding is always possible if n ≥ 2(d ? 1)2(2d2 ? 2d + 1). Partial results are indicated if d ≥ 4 for the embedding of a related design in a corresponding balanced incomplete block design. 相似文献
437.
公司投资行为受股票市场投机影响,投机性时间序列的实质是影响信息收集行为,股市短期时间序列投机者选择接收关于外生震荡不确定性的私人信息,博弈经理投资决策并对经理投资行为产生影响。本文基于信息结构研究股票市场短期时间序列投机对经理投资行为的影响,分析股票市场博弈均衡和经理有效均衡行为,阐明经理低效率投资决策行为的实质。 相似文献
438.
439.
The regression model suggested by Cox (1972) has been widely used in survival analysis with censored observations. We propose isotonic window estimators for a monotone baseline hazard function in the Cox regression model. We prove that these estimators are asymptotically normal. The simulati on results presented in the article suggest that the proposed estimator performs better than several existing estimators in the literature 相似文献
440.
John W. Sawyer Jr. 《The American statistician》2013,67(4):300-308
A strategy is presented for producing code to evaluate first partial derivatives of a function f by computer. Advantage is taken of the capabilities that a compiler must have simply to bring about the evaluation of f. A bound kt on the time it should take to evaluate the partials of f is developed, where f takes time t to evaluate and k is independent of f. The benefits of the differentiation strategy for weighted least squares analysis of categorical data are discussed. 相似文献