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Books reviewed in this articles:
Politics in Brazil 1930–1964: An Experiment in Democracy. By T homas E. S kidmore .
Brazilian Planning: Development Politics and Administration. By R obert T. D aland .
Le Brésil. Special issue of Les Temps Modernes. 相似文献
Politics in Brazil 1930–1964: An Experiment in Democracy. By T homas E. S kidmore .
Brazilian Planning: Development Politics and Administration. By R obert T. D aland .
Le Brésil. Special issue of Les Temps Modernes. 相似文献
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We compare minimum Hellinger distance and minimum Heiiinger disparity estimates for U-shaped beta distributions. Given suitable density estimates, both methods are known to be asymptotically efficient when the data come from the assumed model family, and robust to small perturbations from the model family. Most implementations use kernel density estimates, which may not be appropriate for U-shaped distributions. We compare fixed binwidth histograms, percentile mesh histograms, and averaged shifted histograms. Minimum disparity estimates are less sensitive to the choice of density estimate than are minimum distance estimates, and the percentile mesh histogram gives the best results for both minimum distance and minimum disparity estimates. Minimum distance estimates are biased and a bias-corrected method is proposed. Minimum disparity estimates and bias-corrected minimum distance estimates are comparable to maximum likelihood estimates when the model holds, and give better results than either method of moments or maximum likelihood when the data are discretized or contaminated, Although our re¬sults are for the beta density, the implementations are easily modified for other U-shaped distributions such as the Dirkhlet or normal generated distribution. 相似文献
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Martin Manby Adele Diana Jones Liliana Foca Justyna Bieganski Sylvia Starke 《European Journal of Social Work》2015,18(2):228-245
Qualitative data from a larger study on the impact of parental imprisonment in four countries found that children of prisoners face fundamentally similar psychological and social challenges. The ways that children cope, however, are influenced by the interpretative frame adopted by the adults around them, and by how issues of parental imprisonment are talked about in their families. This article argues that families have to reappraise their view of the imprisoned parent and then decide on their policy for how to deal with this publicly. Their approach may be based on openness and honesty or may emphasise privacy and secrecy, or a combination of these. Children are likely to be influenced by their parents'/carers' views, although these may cause conflict for them. Where parents/carers retain a positive view of the imprisoned parent, children are likely to benefit; where parents/carers feel issues of shame and stigma acutely, this is likely to be transmitted to their children. This is important for social workers and practitioners involved in supporting prisoners' families and for parenting programmes. 相似文献
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Robert W. Irving 《Journal of Combinatorial Optimization》2008,16(4):344-360
We study variants of classical stable matching problems in which there is an additional requirement for a stable matching,
namely that there should not be two participants who would prefer to exchange partners. The problem is motivated by the experience
of real-world medical matching schemes that use stable matchings, where cases have arisen in which two participants discovered
that each of them would prefer the other’s allocation, a situation that is seen as unfair. Our main result is that the problem
of deciding whether an instance of the classical stable marriage problem admits a stable matching, with the additional property
that no two men would prefer to exchange partners, is NP-complete. This implies a similar result for more general problems,
such as the hospitals/residents problem, the many-to-one extension of stable marriage. Unlike previous NP-hardness results
for variants of stable marriage, the proof exploits the powerful algebraic structure underlying the set of all stable matchings.
In practical matching schemes, however, applicants’ preference lists are typically of short fixed length, and we describe
a linear time algorithm for the problem in the special case where all of the men’s preference lists are of length ≤3. 相似文献
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Adele N. Norris 《Sociological spectrum》2013,33(5):449-461
Rural U.S. poverty rates have been persistently high. Market-based anti-poverty strategies, specifically microenterprise programs, have gained currency as a feasible avenue for moving women out of poverty. While rural women may share some commonality, homogeneity among rural women is often assumed in poverty scholarship. It is imperative that poverty scholars contribute to closing the gap between theoretical explanations and the actually experiences of poverty among individuals occupying different social locations. As researchers address this gap, this article argues for the value of integrating two important components consistent with black feminist epistemology: (1) an intersectionality perspective, and (2) the voices of the local actors/stakeholders. This article concludes that without a purposeful examination of individuals located at the intersection of race/ethnicity, gender, and/or class; even carefully formulated policy can inadvertently discriminate against or benefit some women more than others. 相似文献
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The problem of inaccurate, misapplied or fraudulent scientific data could be addressed by government regulations, or by self‐regulation from within science itself. To many, self‐regulation implies the grounding of research activities in some “neutral”; standard of “ethics”; acceptable in a “pluralistic”; society. Yet, there is no such thing as a “neutral ethics”; and many “contemporary”; theories contain such serious theoretical deficiencies and contradictions that they are practically inapplicable. As a viable alternative to these theoretical and practical problems, an objectively based realistic framework of ethics is considered, and used to ground both the individual scientific and the collective public policy decision making processes. This is an ethics of properly integrated relationships. It is then applied to an analysis of many of the causes of incorrect scientific data, as well as of many of the internal and external pressures and abuses often experienced by scientists today. This approach respects the integrity of each decision maker as a human being and a moral agent—which in turn better insures the integrity of the protocol, the data, and the public policy decisions which follow—and ultimately, the integrity of the scientific enterprise itself. The alternative is government regulations. 相似文献