We present a method for fitting parametric probability density models using an integrated square error criterion on a continuum of weighted Lebesgue spaces formed by ultraspherical polynomials. This approach is inherently suitable for creating mixture model representations of complex distributions and allows fully autonomous cluster analysis of high-dimensional datasets. The method is also suitable for extremely large sets, allowing post facto model selection and analysis even in the absence of the original data. Furthermore, the fitting procedure only requires the parametric model to be pointwise evaluable, making it trivial to fit user-defined models through a generic algorithm. 相似文献
Concept mapping is now a commonly-used technique for articulating and evaluating programmatic outcomes. However, research regarding validity of knowledge and outcomes produced with concept mapping is sparse. The current study describes quantitative validity analyses using a concept mapping dataset. We sought to increase the validity of concept mapping evaluation results by running multiple cluster analysis methods and then using several metrics to choose from among solutions. We present four different clustering methods based on analyses using the R statistical software package: partitioning around medoids (PAM), fuzzy analysis (FANNY), agglomerative nesting (AGNES) and divisive analysis (DIANA). We then used the Dunn and Davies-Bouldin indices to assist in choosing a valid cluster solution for a concept mapping outcomes evaluation. We conclude that the validity of the outcomes map is high, based on the analyses described. Finally, we discuss areas for further concept mapping methods research. 相似文献
In this article, we propose a new criterion to evaluate the similarity of probability density functions (pdfs). We call this the criterion on similar coefficient of cluster (SCC) and use it as a tool to deal with overlap coefficients of pdfs in normal standard on [0;1]. With the support of the self-update algorithm for determining the suitable number of clusters, SCC then becomes a criterion to establish the corresponding cluster for pdfs. Moreover, some results on determination of SCC in case of two and more than two pdfs as well as relations of different SCCs and other measures are presented. The numerical examples in both synthetic data and real data are given not only to illustrate the suitability of proposed theories and algorithms but also to demonstrate the applicability and innovation of the proposed algorithm. 相似文献
In the public sector, Canadian governments intervene frequently in labor disputes by suspending collective bargaining and
curtailing legal strikes. Previous research has focused on the contours of government intervention, such as its overall effects
on collective bargaining and strikes. The discussion highlights one actor, a government, restricting the behavior of another
actor, a union, using legislation and policy making. As a result, we know less about more micro-level elements and implications
of the process of government intervention. I address these themes using a detailed case study of the Alberta Teachers’ Association
and the strikes it coordinated in 2002.
The paper seeks to makes a contribution to a recent debate in the Journal about what a political economy of youth might look like. The paper will take up aspects of Sukarieh and Tannock’s [2016. ‘On the political economy of youth: a comment.’ Journal of Youth Studies 19 (9): 1281–1289] response to the initial contributions by Côté [2014. ‘Towards a New Political Economy of Youth.’ Journal of Youth Studies 17 (4): 527–543, 2016. ‘A New Political Economy of Youth Reprised: Rejoinder to France and Threadgold.’ Journal of Youth Studies.] And France and Threadgold [2015. ‘Youth and Political Economy: Towards a Bourdieusian Approach.’ Journal of Youth Studies], and will take the form of three ‘notes’: Capitalism: From the first industrial revolution to the third industrial revolution; Youth as an artefact of governmentalised expertise; The agency/structure problem in youth studies: Foucault’s dispositif and post-human exceptionalism.
These notes will suggest that twenty-first century capitalism is globalising, is largely neo-Liberal, and is being reconfigured in profound ways by the Anthropocene, bio-genetics, Artificial Intelligence (AI), and the Internet of Things (IoT). A political economy of twenty-first century capitalism, let alone a political economy of young people, must be able to account for a capitalism that in many ways looks like the capitalism of the First and Second Industrial Revolutions, but which is at the same time profoundly different as it enters what has often been described as the Third Industrial Revolution. It is these profound emergences that pose the greatest challenges for engaging with a political economy of youth. 相似文献