全文获取类型
收费全文 | 388篇 |
免费 | 17篇 |
专业分类
管理学 | 24篇 |
民族学 | 25篇 |
人口学 | 32篇 |
丛书文集 | 3篇 |
理论方法论 | 24篇 |
综合类 | 18篇 |
社会学 | 177篇 |
统计学 | 102篇 |
出版年
2023年 | 10篇 |
2022年 | 2篇 |
2021年 | 6篇 |
2020年 | 16篇 |
2019年 | 24篇 |
2018年 | 29篇 |
2017年 | 33篇 |
2016年 | 23篇 |
2015年 | 28篇 |
2014年 | 22篇 |
2013年 | 78篇 |
2012年 | 12篇 |
2011年 | 19篇 |
2010年 | 14篇 |
2009年 | 13篇 |
2008年 | 10篇 |
2007年 | 9篇 |
2006年 | 7篇 |
2005年 | 2篇 |
2004年 | 7篇 |
2003年 | 4篇 |
2002年 | 1篇 |
2001年 | 8篇 |
1999年 | 1篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1969年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有405条查询结果,搜索用时 875 毫秒
191.
{{@ convertAbstractHtml(article.abstractinfoCn, "cn")}}
{{if article.graphicalAbstractinfoCn && article.graphicalAbstractinfoCn != ""}}{{@ article.graphicalAbstractinfoCn}}{{/if}} 相似文献
192.
Border estimation of a two-dimensional uniform distribution if data are measured with additive error
The paper considers estimation of the boundary of an elliptical domain when the data without a measurement error are distributed uniformly on this domain but are superimposed by random errors. The problem is solved in two phases. In the first phase the domain is subdivided into thin slices and the endpoints of these slices are estimated within the framework of a corresponding one-dimensional problem. In the second phase the estimated endpoints are used to estimate the boundary using the total least-squares curve fitting procedure. 相似文献
193.
Jadran Dobrić 《统计学通讯:模拟与计算》2013,42(4):1053-1068
ABSTRACT This article suggests a chi-square test of fit for parametric families of bivariate copulas. The marginal distribution functions are assumed to be unknown and are estimated by their empirical counterparts. Therefore, the standard asymptotic theory of the test is not applicable, but we derive a rule for the determination of the appropriate degrees of freedom in the asymptotic chi-square distribution. The behavior of the test under H 0 and for selected alternatives is investigated by Monte Carlo simulation. The test is applied to investigate the dependence structure of daily German asset returns. It turns out that the Gauss copula is inappropriate to describe the dependencies in the data. A t ν-copula with low degrees of freedom performs better. 相似文献
194.
Ana V. Miletić Ilić 《统计学通讯:理论与方法》2013,42(21):6400-6415
ABSTRACTNew generalized binomial thinning operator with dependent counting series is introduced. An integer valued time series model with geometric marginals based on this thinning operator is constructed. Main features of the process are analyzed and determined. Estimation of the parameters are presented and some asymptotic properties of the obtained estimators are discussed. Behavior of the estimators is described through the numerical results. Also, model is applied on the real data set and compared to some relevant INAR(1) models. 相似文献
195.
196.
Betuel Canhanga Anatoliy Malyarenko Ying Ni Milica Rančić Sergei Silvestrov 《统计学通讯:理论与方法》2018,47(6):1328-1349
The celebrated Black–Scholes model made the assumption of constant volatility but empirical studies on implied volatility and asset dynamics motivated the use of stochastic volatilities. Christoffersen in 2009 showed that multi-factor stochastic volatilities models capture the asset dynamics more realistically. Fouque in 2012 used it to price European options. In 2013, Chiarella and Ziveyi considered Christoffersen’s ideas and introduced an asset dynamics where the two volatilities of the Heston type act separately and independently on the asset price, and using Fourier transform for the asset price process and double Laplace transform for the two volatilities processes, solved a pricing problem for American options. This paper considers the Chiarella and Ziveyi model and parameterizes it so that the volatilities revert to the long-run-mean with reversion rates that mimic fast (for example daily) and slow (for example seasonal) random effects. Applying asymptotic expansion method presented by Fouque in 2012, we make an extensive and detailed derivation of the approximation prices for European options. We also present numerical studies on the behavior and accuracy of our first- and second-order asymptotic expansion formulas. 相似文献
197.
Let π1, …, πk be k (? 2) independent populations, where πi denotes the uniform distribution over the interval (0, θi) and θi > 0 (i = 1, …, k) is an unknown scale parameter. The population associated with the largest scale parameter is called the best population. For selecting the best population, We use a selection rule based on the natural estimators of θi, i = 1, …, k, for the case of unequal sample sizes. Consider the problem of estimating the scale parameter θL of the selected uniform population when sample sizes are unequal and the loss is measured by the squared log error (SLE) loss function. We derive the uniformly minimum risk unbiased (UMRU) estimator of θL under the SLE loss function and two natural estimators of θL are also studied. For k = 2, we derive a sufficient condition for inadmissibility of an estimator of θL. Using these condition, we conclude that the UMRU estimator and natural estimator are inadmissible. Finally, the risk functions of various competing estimators of θL are compared through simulation. 相似文献
198.
Landsbergis PA Schnall PL Belkić KL Baker D Schwartz J Pickering TG 《Work (Reading, Mass.)》2001,17(3):191-208
Over the past 20 years, an extensive body of research evidence has documented that psychosocial work stressors are risk factors for hypertension and cardiovascular disease. These stressors, which appear to be increasing in prevalence, include job strain (the combination of psychological job demands and low job control), imbalance between job efforts and rewards, threat-avoidant vigilant work, and long work hours. This article reviews the evidence linking these stressors with hypertension and CVD, and the physiological and social psychological mechanisms underlying the associations. Also described are methods for measuring work stressors and new, more accurate techniques for measuring blood pressure. Finally, strategies for reducing work stressors and preventing hypertension and CVD are reviewed. These include clinical assessment, worksite health promotion, work organization interventions, legal approaches and work site surveillance. 相似文献
199.
吕乃基 《长沙理工大学学报(社会科学版)》2015,(3):5-14
科学的原罪在于其特殊的活动方式和由此得到的抽象的理论。技术的原罪导致生态危机、社会危机和人自身的危机。科学技术原罪的特征是不对称。科学技术原罪的背后是人的本能———好奇与控制,以及人性的弱点。科学技术的发展在一定程度上缓解其原罪,淡化和改变人的本能,改善人性的弱点。 相似文献
200.
刘文丽 《长江大学学报(社会科学版)》2015,(2):41-44
作为《侵权责任法》中一种重要的救济途径,死亡赔偿金制度在生命权救济和人权保障方面发挥着积极作用。目前,我国的死亡赔偿金制度面临死亡赔偿金计算方法缺失、统一死亡赔偿金标准难以适用、死亡赔偿金请求权主体和精神损害赔偿规则粗糙等问题。因此,应明确死亡赔偿金的性质,合理制定死亡赔偿金的计算标准,完善死亡赔偿金的请求权主体。 相似文献