群体AHP的最小偏差排序方法     

胡见阳 《赣南师范学院学报》1993,(Z2)

本文首先讨论了群体AHP的一种新的排序方法(GLDM),建立了这种方法的理论并且给出了它的算法。接着讨论了加权的GLDM以及其权系数的给定方法。最后通过一算例对比了GLDM和GLLSM以说明GLDM的有效性和优越性。  相似文献   

格子点分布的随机加权逼近     

刘焕彬  周勇 《黄冈师范学院学报》1995,(3)

用随机加权和分布去逼近格子点随机变量X1，X2，…，Xn的均值的分布，获得的逼近速度为，且给出精确的同阶O的常数为．  相似文献   

基于多区域中心加权卷积特征的图像检索     

杨海龙  张娜  包晓安  桂江生 《教育技术导刊》2019,18(8):204-207

针对图像特征局部信息描述不足问题,提出一种基于多区域中心加权深度卷积特征提取方法。首先通过卷积神经网络提取输入图像的卷积层激活特征图,然后通过计算不同通道特征图的差异,选择具有区分性的区域特征图,最后通过多区域权重进行加权聚合,生成用于检索图像特征向量。在不同的建筑物数据集进行实验,结果表明检索精度分别提升了1.2%、0.9%。  相似文献   

Templates,typologies and typifications: neoliberalism as keyword     

Emma Rowe  Christopher Lubienski  Andrew Skourdoumbis  Jessica Gerrard  David Hursh 《Discourse: Studies in the Cultural Politics of Education》2019,40(2):150-161

ABSTRACT

Neoliberalism as a concept, ideology, or theoretical lens has emerged in the last couple of decades as a monolithic presence in education research, and the social sciences more broadly. We bring two aims to this Special Issue: to critique the rigour of neoliberalism as a theoretical framework utilised within education research; and second, to explore and propose an alternative to neoliberalism as a critical frame of analysis. This paper will postulate three-waves of neoliberalism, specifically ordo-liberalism, radical liberalism, and post-neoliberalism. We challenge ‘big-N’ neoliberalism; conceptualisations of neoliberalism as homogenous and monolithic; and, demonstrate how neoliberalism interacts with particular milieus of time and space. In reflection of Williams but also Foucault’s tracing of ‘discursive formations’, neoliberalism as a keyword points to a genealogy of power which requires further excavation. The notion of an assemblage, enabling mutations and contra configurations, may offer a way forward.  相似文献   

应变式电子计价称的弹性体设计     

李娟 《石家庄职业技术学院学报》2001,13(4):31-33

在应变武传感器设计中,弹性体的设计是一个重要环节.通过对悬臂单梁和平行梁形状的弹性体的力学分析,说明经改造后的平行梁弹性体能满足电子计价称的设计要求.  相似文献   

Analysis of group performance with categorical data when agents are heterogeneous: The evaluation of scholastic performance in the OECD through PISA     

《Economics of Education Review》2014

This paper analyzes the evaluation of the relative performance of a set of groups when their outcomes are defined in terms of categorical data and the groups’ members are heterogeneous. This type of problem has been dealt with in Herrero and Villar (2013) for the case of a homogeneous population. Here we expand their model controlling for heterogeneity by means of inverse probability weighting techniques. We apply this extended model to the analysis of the scholastic performance of fifteen-year-old students in the OECD countries, using the data in the PISA. We evaluate the relative performance of the different countries out of the distribution of the students’ achievements across the different levels of competence, controlling by the students’ characteristics (explanatory variables regarding schooling and family environment). We find that differences in mathematical and reading abilities across OECD countries would lower by between 40% and 50% if the students’ characteristics would be those for the OECD average.  相似文献   

基于特征加权支持向量机的血吸虫尾蚴识别算法设计与应用     

易云  汪廷华 《赣南师范学院学报》2012,33(3):37-40

本文提出一种利用特征加权支持向量机（FWSVM）识别河流、湖泊等水域中血吸虫尾蚴的算法．该算法采用图像形态学、动态阈值化等图像处理方法在图片中搜索可能存在尾蚴的区域,然后利用疑似区域图像的Hu矩作为特征值训练FWSVM,最后利用训练好的分类器对采集的视频进行识别．实验结果表明该算法能够有效识别水域中的血吸虫尾蚴．  相似文献   

An approach to assign individual marks from a team mark: the case of Australian grading system at universities     

Kali Prasad Nepal 《Assessment & Evaluation in Higher Education》2012,37(5):555-562

This study uses a new approach to assign individual marks from a team mark using individual contributions to a teamwork product. A team member’s contribution to a teamwork product, in the form of an individual weighting factor, is calculated using team members’ co‐assessment. A comparison of the proposed approach with existing methods has been discussed with the help of a typical teamwork example. The approach has been refined to make it applicable for the Australian grading system at universities. It has been implemented in a large undergraduate engineering course to observe its effectiveness in practice. The results show that the method encourages teamwork, penalises below‐average contributions and rewards above‐average contributions. An analysis of a students’ perception survey shows that students prefer the approach over alternative approaches.  相似文献   

一种探测组织知识结构的新方法:基于FCA的作者关键词耦合分析     

刘萍  王哲 《图书情报工作》2012,56(22):121-128

阐述作者关键词耦合和形式概念分析的基本原理,详细讨论在作者关键词耦合的基础上生成概念格的具体方法以及知识结构的建构过程。通过对该方法在某一科研组织中的应用举例,阐明该方法能够较好地揭示组织知识结构。与传统的共词分析方法相比,基于形式概念分析的作者关键词耦合分析方法层次化效果更清晰、人工干预程度更低。  相似文献   

Assessing Methods for Generalizing Experimental Impact Estimates to Target Populations     

《Journal of research on educational effectiveness》2013,6(1):103-127

ABSTRACT

Randomized experiments are considered the gold standard for causal inference because they can provide unbiased estimates of treatment effects for the experimental participants. However, researchers and policymakers are often interested in using a specific experiment to inform decisions about other target populations. In education research, increasing attention is being paid to the potential lack of generalizability of randomized experiments because the experimental participants may be unrepresentative of the target population of interest. This article examines whether generalization may be assisted by statistical methods that adjust for observed differences between the experimental participants and members of a target population. The methods examined include approaches that reweight the experimental data so that participants more closely resemble the target population and methods that utilize models of the outcome. Two simulation studies and one empirical analysis investigate and compare the methods’ performance. One simulation uses purely simulated data while the other utilizes data from an evaluation of a school-based dropout prevention program. Our simulations suggest that machine learning methods outperform regression-based methods when the required structural (ignorability) assumptions are satisfied. When these assumptions are violated, all of the methods examined perform poorly. Our empirical analysis uses data from a multisite experiment to assess how well results from a given site predict impacts in other sites. Using a variety of extrapolation methods, predicted effects for each site are compared to actual benchmarks. Flexible modeling approaches perform best, although linear regression is not far behind. Taken together, these results suggest that flexible modeling techniques can aid generalization while underscoring the fact that even state-of-the-art statistical techniques still rely on strong assumptions.  相似文献