全文获取类型
收费全文 | 13834篇 |
免费 | 335篇 |
专业分类
管理学 | 1815篇 |
民族学 | 59篇 |
人才学 | 1篇 |
人口学 | 1198篇 |
丛书文集 | 86篇 |
教育普及 | 2篇 |
理论方法论 | 1287篇 |
综合类 | 342篇 |
社会学 | 7032篇 |
统计学 | 2347篇 |
出版年
2021年 | 69篇 |
2020年 | 213篇 |
2019年 | 254篇 |
2018年 | 276篇 |
2017年 | 408篇 |
2016年 | 312篇 |
2015年 | 248篇 |
2014年 | 281篇 |
2013年 | 2238篇 |
2012年 | 440篇 |
2011年 | 364篇 |
2010年 | 248篇 |
2009年 | 264篇 |
2008年 | 308篇 |
2007年 | 313篇 |
2006年 | 253篇 |
2005年 | 388篇 |
2004年 | 330篇 |
2003年 | 291篇 |
2002年 | 303篇 |
2001年 | 341篇 |
2000年 | 319篇 |
1999年 | 334篇 |
1998年 | 229篇 |
1997年 | 221篇 |
1996年 | 232篇 |
1995年 | 206篇 |
1994年 | 219篇 |
1993年 | 191篇 |
1992年 | 253篇 |
1991年 | 258篇 |
1990年 | 222篇 |
1989年 | 228篇 |
1988年 | 206篇 |
1987年 | 193篇 |
1986年 | 197篇 |
1985年 | 188篇 |
1984年 | 219篇 |
1983年 | 209篇 |
1982年 | 176篇 |
1981年 | 147篇 |
1980年 | 144篇 |
1979年 | 175篇 |
1978年 | 143篇 |
1977年 | 125篇 |
1976年 | 113篇 |
1975年 | 111篇 |
1974年 | 101篇 |
1973年 | 101篇 |
1971年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 937 毫秒
841.
Every adult can eliminate the risk of losing control of personal health decisions and financial resources by having a last will and testament, health proxy, power of attorney, and living trust. Yet evidence suggests that less than a majority of adult Americans have these documents. We surveyed 900 adult Americans (25 plus years old) to determine what factors predict the possession of these risk-reducing documents. In total, 46% had a living will and testament, 32% a durable power of attorney, 30% a health proxy, and 18% a living trust. Events that prompt people with wealth to secure these documents, such as increasing age, getting married, having children, and experiencing a life-threatening event were the strongest predictors of having a will. These were also among the strongest predictors of having a health proxy, along with a personal history of being proactive, and a family history that fostered trust of attorneys. Affluence, age, and education were the strongest predictors of having a living trust, and the strongest correlate of having a durable power of attorney was having faced a life-threatening event, positive experiences with attorneys, and higher educational achievement. 相似文献
842.
The smooth goodness of fit tests are generalized to singly censored data and applied to the problem of testing Weibull (or extreme value) fit. Smooth tests, Pearson-type tests, and the spacings tests proposed by Mann, Schemer, and Fertig (1973) are compared on the basis of local asymptotic relative efficiency with respect to the asymptotic best test against generalized gamma alternatives, The smooth test of order one Is found to be most efficient for the generalized gamma alternatives. 相似文献
843.
Arthur G. Holms 《统计学通讯:模拟与计算》2013,42(1):51-71
As many as three iterated statistical model deletion procedures are considered for an experiment.Population model coeff cients were chosen to simulate a saturated 24experiment having an unfavorable distribution of parameter values.Using random number studies, three model selection strategies were developed, namely, (1) a strategy to be used in anticipation of large coefficients of variation (neighborhood of 65 percent), (2) strategy to be used in anticipation of small coefficients of variation (4 percent or less), and (3) a security regret strategy to be used in the absence of such prior knowledge 相似文献
844.
Survey data collected from a southwestern metropolitan area indicate that self-defined politically conservative individuals are less inclined to commit criminal or deviant acts than their liberal or moderate counterparts; however, results from multivariate analyses indicate that measures of self-control and pressure to conform all reduce the effects of political conservatism to nonsignificance. In general, the relationship between political ideology and misbehavior appears to be partly spurious and partly indirectly attributable to the effects of other social and situational factors. Moreover, responsiveness to pressures to conform is not due to self-control. The results provide some challenge to traditional interpretations of misbehavior but they also confirm an important part played by structural/contextual variables. 相似文献
845.
R. Mansell Prothero 《Population studies》2013,67(2):166-183
A brief survey of censuses previously taken in Northern Nigeria makes clear by comparison the importance of the 1952 Census in the acquisition of demographic data. Some of the problems of organising and conducting the census are considered. The analysis of the census results pays special attention to the pattern of population density but consideration is also given to age and sex structure, occupations, tribal data, literacy and religions. Shortcomings and omissions in the census, particularly the absence of any information on migration, are noted. The conclusion stresses the importance of the 1952 Census as a basis for future demographic studies ; the evidence for an increasing population but the absence of vital statistics to explain this ; the need for much further detailed analysis to be undertaken of the data in the 1952 Census. 相似文献
846.
William J. Hall Kristen D. Witkemper Grayson K. Rodgers Emily M. Waters Mark R. Smith 《Journal of gay & lesbian social services》2018,30(1):49-63
Purpose: Many students who are lesbian, gay, bisexual, transgender, or queer (LGBTQ) face hostile school environments that can negatively impact their mental health and education. This study involved a photovoice project where high school students from a gay-straight alliance in the rural southeastern United States took photographs that depicted the issues LGBTQ students were facing and then exhibited their photographs and stories to individuals from the school system and local community to promote awareness, dialogue, and action. Methods: Twenty adults who attended the photovoice exhibit responded to an online survey about their experiences with the intervention. Results: Eighty-five percent of adults reported that the intervention made them think about issues they had not previously considered, including the struggles LGBTQ youths face, gender issues, and living in a rural community. Common emotions experienced at the intervention included feeling excited, concern for the youths, and proud of the youths. Furthermore, 81% of the adults indicated that they would take action or behave differently as a result of the intervention, including supporting and affirming LGBTQ students, using gender-neutral and -inclusive language, and confronting bias in themselves and others. Conclusions: Photovoice is a promising strategy for LGBTQ students to activate adult allies in their community. 相似文献
847.
The effect of a single variable data point, x, on the usual test statistics for traditional hypothesis tests for means is analyzed. It is shown that an outlier may have a profound and unexpected effect on the test statistic. Although it might appear that an outlier would tend to lend support to the alternate hypothesis, it may in fact detract from the significance of the test. In one-population tests and analysis of variance (ANOVA), the value of x that maximizes the significance of the test statistic is given. This value does not have to be unusually large or small. In fact, it often falls within the range of the other sample points. In the general one-population case, the limiting value for the test statistic is shown to be +1. In the case involving more than one population, it is shown that the limiting value of the test statistic is a function only of the number of members in the samples and not their relative values. Special cases are identified in which the test statistic is shown to have unique characteristics depending on the characteristics of the data. 相似文献
848.
ABSTRACT The purposes of this paper are to abstract from a number of articles variance component estimation procedures which can be used for completely random balanced incomplete block designs, to develop an iterated least squares (ITLS) computing algorithm for calculating maximum likelihood estimates, and to compare these procedures by use of simulated experiments. Based on the simulated experiments, the estimated mean square errors of the ITLS estimates are generally less than*those for previously proposed analysis of variance and symmetric sums estimators. 相似文献
849.
850.
Dolores Añón Higón Ödül Bozkurt Jeremy Clegg Irena Grugulis Sergio Salis Nicholas Vasilakos Allan M. Williams 《国际管理评论杂志》2010,12(2):201-217
This paper discusses the literature on the established determinants of productivity in the retail sector. It also draws attention to some neglected strands of research which provide useful insights into strategies that could allow productivity enhancements in this area of the economy. To date, very few attempts have been made to integrate different specialisms in order to explain what drives productivity in retail. Here this paper rectifies this omission by putting together studies from economics, geography, knowledge management and employment studies. It is the authors’ view that quantitative studies of retail productivity should focus on total factor productivity in retailing as the result of competition/composition effects, planning regulations, information and communications technology, the multinational operation element and workforce skills. Further, the fact that retail firms possess advantages that are transferable between locations suggests that investment in strategies enhancing the transfer of explicit and tacit knowledge between and within businesses are crucial to achieve productivity gains. 相似文献