全文获取类型
收费全文 | 275篇 |
免费 | 8篇 |
专业分类
管理学 | 42篇 |
民族学 | 1篇 |
人口学 | 25篇 |
丛书文集 | 2篇 |
理论方法论 | 32篇 |
综合类 | 2篇 |
社会学 | 145篇 |
统计学 | 34篇 |
出版年
2022年 | 2篇 |
2020年 | 4篇 |
2019年 | 16篇 |
2018年 | 8篇 |
2017年 | 10篇 |
2016年 | 6篇 |
2015年 | 5篇 |
2014年 | 13篇 |
2013年 | 40篇 |
2012年 | 7篇 |
2011年 | 9篇 |
2010年 | 10篇 |
2009年 | 4篇 |
2008年 | 8篇 |
2007年 | 16篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 8篇 |
2003年 | 5篇 |
2002年 | 8篇 |
2001年 | 7篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 1篇 |
1995年 | 6篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 7篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 5篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 4篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1975年 | 4篇 |
1974年 | 2篇 |
1973年 | 4篇 |
1968年 | 1篇 |
1966年 | 1篇 |
1963年 | 2篇 |
排序方式: 共有283条查询结果,搜索用时 156 毫秒
181.
Jared Verner Robert Pastorok Joel O'connor William Severinghaus Norman Glass Norman Glass 《The American statistician》2013,67(4):393-402
Most of what is currently known about ecosystems derives from two sources: comprehensive studies by classical ecologists and economically motivated studies by resource specialists. The former have traditionally concentrated on natural or long-undisturbed ecosystems, the latter on those few species in managed or polluted ecosystems that are harvested, hunted, or fished. A recent genre of legislation, drafted with insight provided by the scientific community, recognizes the dearth of ecological information on managed or polluted communities (which are becoming far more ubiquitous and important) and dramatically raises the requirements for comprehensive data and data analyses to guide managerial and pollution abatement policies. This paper describes several important current efforts to use ecological community structure analyses to implement and enforce such legislation and some effects of such analyses on environmental policy. 相似文献
182.
Determinants of political support for new sports facilities are explored. We test to what extent the civic attachment and civic optimism of a respondent promotes support for new facilities. Survey data from the 2005 CBS News/New York Times monthly poll were analyzed to find variables that affected public support for a new stadium for the New York Mets and a new arena for the New Jersey Nets. Whether New Yorkers’ were optimistic about the future of New York and whether they planned to continue living in New York had a significant impact on whether they supported new facilities. Demographic factors that frequently explain political differences did not have a significant effect. Respondents with greater civic attachment and optimism were more likely to support major sports projects. The findings open the door for additional research on how civic attachment and optimism impact the willingness of community residents to support major public projects. 相似文献
183.
Joel Michalek 《统计学通讯:理论与方法》2013,42(3):241-250
An empirical distribution function Fm, defined on a subset of order statistics of a random sample of size n taken from the distribution of a random variable with continuous distribution function F, is shown to converge uniformly with probability one to F. Small sample distributions of the one and two sided deviations and the asymptotic normality of the standardized Fm are established. The relative efficiency of Fm as compared to the classical empirical distribution function is calculated and tabled. for n = 10, 20, 50, 100, 200. 相似文献
184.
Beth Bourdeau Joel W. Grube Melina M. Bersamin Deborah A. Fisher 《Journal of research on adolescence》2011,21(3):639-648
This article reports on the development and psychometric properties of the Adolescent Sexual Expectancies Scale (ASEXS). Data were obtained from three annual longitudinal surveys of youth aged 10–17 at the first administration (N=932 at Wave 3). Confirmatory factor analyses indicated that 4 correlated factors corresponding to Social Risk, Social Benefit, Health Risk, and Pleasure adequately represented the expectancy items. High alpha coefficients and stability across survey waves indicated good internal and test–retest reliability for these factors. Latent variable autoregressive analyses indicated that Social Risk expectancies predicted changes in sexual behavior over the course of the study. Multigroup analyses established that the measurement and predictive models were equivalent for males and females and across age groups. The ASEXS provides researchers with a useful measure for examining adolescents' expectancy beliefs about the consequences of sexual behavior. 相似文献
185.
This paper extends the one-way heteroskedasticity score test of Holly and Gardiol (2000, In: Krishnakumar, J, Ronchetti, E (Eds.), Panel Data Econometrics: Future Directions, North-Holland, Amsterdam, pp. 199–211) to two conditional Lagrange Multiplier (LM) tests of heteroskedasticity under contiguous alternatives within the two-way error components model framework. In each case, the derivation of Rao's efficient score statistics for testing heteroskedasticity is first obtained. Then, based on a specific set of assumptions, the asymptotic distribution of the score under contiguous alternatives is established. Finally, the expression for the score test statistic in the presence of heteroskedasticity and related asymptotic local powers of these score test statistics are derived and discussed. 相似文献
186.
Joel E. Cohen 《The American statistician》2015,69(1):5-7
Markov's inequality gives an upper bound on the probability that a nonnegative random variable takes large values. For example, if the random variable is the lifetime of a person or a machine, Markov's inequality says that the probability that an individual survives more than three times the average lifetime in the population of such individuals cannot exceed one-third. Here we give a simple, intuitive geometric interpretation and derivation of Markov's inequality. These results lead to inequalities sharper than Markov's when information about conditional expectations is available, as in reliability theory, demography, and actuarial mathematics. We use these results to sharpen Chebyshev's tail inequality also. 相似文献
187.
Eric Campbell Beverly Moy Sandra Feibelmann Joel Weissman David Blumenthal 《Accountability in research》2013,20(2):103-118
The purpose of this study was to explore qualitatively the nature, consequences and management of institutional academic industry relationships (IAIRs) in the life and health sciences. The results of our interviews suggest that in the institutions we visited IAIRs are common and deeply embedded in the academic enterprise both among institutional officials and the organization itself. Many believe these relationships have potential benefits for the research and education mission while creating the potential for conflicts of interest. Further tracking and study of IAIRs is required to understand and anticipate the full effects of these relationships on the scientific enterprise in the United States. 相似文献
188.
189.
Leonardo Soares Bastos Joel Mauricio Correa da Rosa 《Journal of applied statistics》2013,40(7):1533-1544
In this paper, we provide probabilistic predictions for soccer games of the 2010 FIFA World Cup modelling the number of goals scored in a game by each team. We use a Poisson distribution for the number of goals for each team in a game, where the scoring rate is considered unknown. We use a Gamma distribution for the scoring rate and the Gamma parameters are chosen using historical data and difference among teams defined by a strength factor for each team. The strength factor is a measure of discrimination among the national teams obtained from their memberships to fuzzy clusters. The clusters are obtained with the use of the Fuzzy C-means algorithm applied to a vector of variables, most of them available on the official FIFA website. Static and dynamic models were used to predict the World Cup outcomes and the performance of our predictions was evaluated using two comparison methods. 相似文献
190.
Campbell EG Moy B Feibelmann S Weissman JS Blumenthal D 《Accountability in research》2004,11(2):103-118
The purpose of this study was to explore qualitatively the nature, consequences and management of institutional academic industry relationships (IAIRs) in the life and health sciences. The results of our interviews suggest that in the institutions we visited IAIRs are common and deeply embedded in the academic enterprise both among institutional officials and the organization itself. Many believe these relationships have potential benefits for the research and education mission while creating the potential for conflicts of interest. Further tracking and study of the IAIRs is required to understand and anticipate the full effects of these relationships on the scientific enterprise in the United States. 相似文献