全文获取类型
收费全文 | 141篇 |
免费 | 1篇 |
专业分类
管理学 | 36篇 |
民族学 | 2篇 |
人口学 | 5篇 |
理论方法论 | 9篇 |
社会学 | 66篇 |
统计学 | 24篇 |
出版年
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 1篇 |
2015年 | 6篇 |
2014年 | 5篇 |
2013年 | 39篇 |
2012年 | 3篇 |
2011年 | 5篇 |
2010年 | 6篇 |
2009年 | 5篇 |
2008年 | 3篇 |
2007年 | 4篇 |
2006年 | 4篇 |
2005年 | 8篇 |
2004年 | 6篇 |
2003年 | 5篇 |
2002年 | 2篇 |
2001年 | 3篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1989年 | 2篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有142条查询结果,搜索用时 1 毫秒
71.
In this article, we formulate a transfer theorem in terms of probability generating functions and discuss two approaches to limit distributions of random sums of Z +-valued random variables. We then develop Z +-valued N-ID and ?-ID laws. 相似文献
72.
Rocchio’s similarity-based relevance feedback algorithm, one of the most important query reformation methods in information retrieval, is essentially an adaptive supervised learning algorithm from examples. In practice, Rocchio’s algorithm often uses a fixed query updating factor. When this is the case, we strengthen the linear Ω(n) lower bound obtained by Chen and Zhu (Inf. Retr. 5:61–86, 2002) and prove that Rocchio’s algorithm makes Ω(k(n−k)) mistakes in searching for a collection of documents represented by a monotone disjunction of k relevant features over the n-dimensional binary vector space {0,1} n , when the inner product similarity measure is used. A quadratic lower bound is obtained when k is linearly proportional to n. We also prove an O(k(n−k)3) upper bound for Rocchio’s algorithm with the inner product similarity measure in searching for such a collection of documents with a constant query updating factor and a zero classification threshold. 相似文献
73.
The work aims to contribute to the construction a local-scale poverty indicator, which contemplates multiple dimensions and allows for spatialization of socioeconomic data for a rural area in the Monte Desert. Given the evident and widely studied relationship between desertification processes and poverty, and aiming to contribute to integrating socioeconomic information to desertification assessment and monitoring, there arises the need for spatializing poverty by addressing its multiple dimensions, aspects poorly developed thus far. For this purpose, a data model was designed, which enabled integrating quantitative and qualitative information within the scope of geographic ?nformation systems (GIS) with multi-criteria decision analysis (MCDA), whereby it was possible to spatialize in detail the degree of poverty in the study area, laying the foundations for up-scaling the assessment to different scales. This work demonstrates the usefulness of GIS and MCDA as an instrument that enables progressing in new integral, interdisciplinary, multi-scale and multi-temporal approaches. 相似文献
74.
Many researchers in economics as well as sociology have stressed the important role of business networks for cooperation, trust, and performance. This claim is based on solid theoretical arguments as well as empirical findings. However, neither theory nor the selective empirical results support the view that networks are always beneficial for economic transactions. This paper begins with an observation that for the purchase of IT products, network embeddedness leads to even more problems for the customer. In order to explain this effect, possible reasons for this phenomenon are discussed using theory as well as empirics. The most promising explanation for this special case is the effect of uncertainty and incomplete information ex post. In order to reduce this uncertainty, the buyer forms beliefs on the basis of the opinions existing in a shared network or group. However, if the network members have the same problem of uncertainty, suppliers have an incentive to reduce their performance because such behavior will not be detected and sanctioned. An analysis of the customer's tolerance to a supplier's behavior in business transactions yields support for this argument. Even if problems in a transaction are kept constant, customers give suppliers more reputational credit if they share a common network. 相似文献
75.
This article focuses on the problems faced by dual‐earner partnerships arising from the regional coordination of the partners' careers. It is still unknown whether the fact that couples are less mobile than singles is caused by homogeneous preferences within couples or by a process of balancing conflicting interests. Consequently, we analyze the potential conflicts provoked by work‐related migration incentives. We test hypotheses derived from bargaining theory using quasi‐experimental data from a factorial survey of nearly 280 European couples. Our results support the bargaining approach and confirm that asymmetrical shifts in bargaining power drive the potential for conflict. Women's willingness to move is generally less than men's, but the impact of employment prospects differs only slightly by gender. 相似文献
76.
Meni Koslowsky Abraham Sagie Michael G. Goldenhersh Dror Guberman Michael David Henri Trau 《Work and stress》2013,27(1):87-93
Abstract Little research has been conducted on the relationship between state anxiety and embarrassment in a medical setting. In the prcsent study, several personality and situational variables were examined as antecedents of state anxiety. A total of 277 patients who had come for an examination either as a response to a melanoma screening programme or due to a dermatological complaint participated in the study. Results showed that purpose of patient visit, physician's recommendation, trait anxiety, and embarrassment, were each correlated with state anxiety. Furthermore, using mediated regression analysis as well as structural equations, embarrassment was found to mediate between the above antecedents and state anxiety. The authors proposed a model linking all the variables and identifying their paths. Theoretical and practical considerations of the findings are discussed. 相似文献
77.
Received: October 15, 1998; revised version: January 10, 2000 相似文献
78.
n-person (n – 1)-quota-games where the quotas are positive for certain n – 1 (strong) players and negative for the remaining (weak) player, are discussed. Normative solutions predicted by the Core,the Kernel, the Bargaining Set, the Competitive Bargaining Set, and by the Shapley Value are presented and exemplified.Each of twelve groups of subjects participated in a four-person and a five-person (n – 1)-quota games with one weak player. The weak player was always excluded from the ratified coalition. The division of payoffs among the strong players was more egalitarian than the Kernel solution but less egalitarian than the Shapley value. The Core and the Bargaining Sets were fully supported for the two strongest players, but less supported for the other players. Analyses of the bargaining process confirmed a dynamic interpretation of the Bargaining Set Theory.This research was performed while the author was at the University of North Carolina. The research was partially supported by a PHS Research Grant No. MH-10006 from the National Institute of Mental Health. The author thanks Professor Amnon Rapoport for helpful advice in the design of this study. 相似文献
79.
Kenny Crump John Viren Abraham Silvers Harvey Clewell III Jeff Gearhart Annette Shipp 《Risk analysis》1995,15(4):523-532
Applying a hockey stick parametric dose-response model to data on late or retarded development in Iraqi children exposed in utero to methylmercury, with mercury (Hg) exposure characterized by the peak Hg concentration in mothers'hair during pregnancy, Cox et al. calculated the "best statistical estimate" of the threshold for health effects as 10 ppm Hg in hair with a 95% range of uncertainty of between 0 and 13.6 ppm.(1) A new application of the hockey stick model to the Iraqi data shows, however, that the statistical upper limit of the threshold based on the hockey stick model could be as high as 255 ppm. Furthermore, the maximum likelihood estimate of the threshold using a different parametric model is virtually zero. These and other analyses demonstrate that threshold estimates based on parametric models exhibit high statistical variability and model dependency, and are highly sensitive to the precise definition of an abnormal response. Consequently, they are not a reliable basis for setting a reference dose (RfD) for methylmercury. Benchmark analyses and statistical analyses useful for deriving NOAELs are also presented. We believe these latter analyses—particularly the benchmark analyses—generally form a sounder basis for determining RfDs than the type of hockey stick analysis presented by Cox et al. However, the acute nature of the exposures, as well as other limitations in the Iraqi data suggest that other data may be more appropriate for determining acceptable human exposures to methylmercury. 相似文献
80.
Abraham Margolies 《Social Studies》2013,104(6):247-251
In the current era of high-stakes testing and accountability, many social studies teachers struggle to find creative ways to add depth and authenticity to a broad, shallow curriculum. Teachers can use the time after tests are administered for students to reflect back on the social studies curriculum and select topics they want to study more deeply by digging “postholes,” or inquiries into questions, persons, processes, or events of their choosing. This article describes one teacher's efforts to implement an inquiry project in which she conferred with her students individually to formulate research questions and a research strategy and gave them opportunities to publicly and authentically share their work. 相似文献