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371.
The transfer ratio of bacteria from one surface to another is often estimated from laboratory experiments and quantified by dividing the expected number of bacteria on the recipient surface by the expected number of bacteria on the donor surface. Yet, the expected number of bacteria on each surface is uncertain due to the limited number of colonies that are counted and/or samples that can be analyzed. The expected transfer ratio is, therefore, also uncertain and its estimate may exceed 1 if real transfer is close to 100%. In addition, the transferred fractions vary over experiments but it is unclear, using this approach, how to combine uncertainty and variability into one estimate for the transfer ratio. A Bayesian network model was proposed that allows the combination of uncertainty within one experiment and variability over multiple experiments and prevents inappropriate values for the transfer ratio. Model functionality was shown using data from a laboratory experiment in which the transfer of Salmonella was determined from contaminated pork meat to a butcher's knife, and vice versa. Recovery efficiency of bacteria from both surfaces was also determined and accounted for in the analysis. Transfer ratio probability distributions showed a large variability, with a mean value of 0.19 for the transfer of Salmonella from pork meat to the knife and 0.58 for the transfer of Salmonella from the knife to pork meat. The proposed Bayesian model can be used for analyzing data from similar study designs in which uncertainty should be combined with variability. 相似文献
372.
Shannon Jenkins 《Social science quarterly》2012,93(2):415-433
373.
374.
Low and Middle Income Mothers' Regulation of Negative Emotion: Effects of Children's Temperament and Situational Emotional Responses 总被引:3,自引:0,他引:3
The present study investigated the effects of situational (child situational emotions) and dispositional (child temperament) child variables on mothers’ regulation of their own hostile (anger) and nonhostile (sadness and anxiety) emotions. Participants included 94 low and middle income mothers and their children (41 girls; 53 boys) aged 3 to 6 years. Children's situational emotions (anger, sadness, or fear) and parent emotion type (hostile or nonhostile) were important predictors of mothers’ regulation, but their effects were influenced by SES: Middle income mothers were more likely to control hostile than nonhostile emotions in response to child anger and sadness, and more likely than low income mothers to control hostile emotions in response to child sadness and fear. Low income mothers were more likely than middle income mothers to control nonhostile emotions in response to child anger. However, results also suggest that differences in emotion regulation between low and middle income mothers may stem from the link between SES and authoritarian parenting beliefs. Maternal regulation of negative emotion was not predicted by child temperament. 相似文献
375.
This study investigated the characteristics of families with a new baby, screened to identify families with vulnerability, who did not take up the offer of home‐visiting support from a community volunteer. Using logistic regression, background factors were compared with those families receiving support. Those not receiving support, 59.1% of those referred, were more socially, educationally and economically disadvantaged, living in more disadvantaged neighbourhoods. Those who received support were more likely to have larger families, no local support network, or had family members with health or mental health problems. One in nine families referred had not been reached by the support service. In brief qualitative telephone interviews, mothers who did not take up the offer of support reported changing their mind, wanting to cope without help and in some cases feeling that the support offered did not meet their specific needs. Policy implications are suggested, in particular offering support to new parents thought to be vulnerable within a statutory framework, with sufficient infrastructure and resources to conduct outreach work. Research implications include making a concerted effort to find out about families who decide not to take part in service evaluation studies, or who drop out after initial agreement. 相似文献
376.
Two tools to assist organizational self‐assessment have recently become popular in the U.K. nonprofit sector, providing the opportunity for a comparative study of how such tools are used in practice. Because both spring from the quality movement in management, the study also provided a chance to observe how quality ideas evolve as they are applied in nonprofit contexts. The study found that self‐assessment can indeed enable constructive review processes in a wide range of contexts. However, when the models “work” it is in rather different ways than is suggested by the terms in which they are promoted. 相似文献
377.
378.
379.
Jenkins Robert M. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1995,6(2):183-201
One of the important developments in post-Communist Hungary has been the growth of the voluntary or non-profit sector. Under
the Communist regime, voluntary associations were controlled and independent organisations were largely suppressed. During
the 1980s, advocacy groups and independent associations emerged to challenge the Communist monopoly on organisation. These
challenges were instrumental in laying the foundation for the post-Communist non-profit sector, providing models of organisation
and experienced activists. After the creation of a new legal framework in 1989 and 1990, the growth of the non-profit sector
was dramatic. Two types of non-profit organisations have developed in democratic Hungary: associations predominate in membership
activities, while foundations are active in fields requiring fund-raising. Attempts by the Hungarian Democratic Forum-led
government to shape the non-profit sector to meet its goals were met with political pressure from professionals in the non-profit
sector. The result was the beginnings of a contract-for-service regime and increased organisation of a contract-for-service
regime and increased organisation of interests within the non-profit sector itself.
This is a revised version of a paper presented at the 1994 Annual Conference of the Association for Research on Nonprofit
Organizations and Voluntary Action (ARNOVA), Berkeley, California, October 1994. The author gratefully acknowledges support
from the Program on Nonprofit Organizations (PONPO), Yale University. Helpful comments were provided by David Bronkema, éva
Kuti, Debra Minkoff, Suzanne Morrah and members of the PONPO Colloquium. 相似文献
380.
Paton Rob Foot Jane 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2000,11(4):329-353
Arrangements to certify that an organization's management systems meet standards of good practice are an increasingly prominent feature in the environment of public and private nonprofits. This paper reports an exploratory study of the issues that this phenomenon presents to managers and policy makers, drawing on the limited literature, and five case studies covering two different schemes. The main conclusions are that nonprofits can and do use these awards in very different ways, and hence the outcomes are diverse. These findings run counter both to the rational system assumptions on which such arrangements are based, and to the general thrust of institutional theory with its emphasis on isomorphism. Some implications for decision makers and future research are outlined. 相似文献