想象训练研究现状的分析   总被引：1，自引：0，他引：1  

徐和庆  罗剑 《福建体育科技》2001,20(2):37-40

本文采用文献资料法对近十年刊载在中美四种主要期刊上的想象训练研究报告作了分析。结果表明想象训练正在从有效性研究向过程变量研究深化 ,研究面也由简单技术向复杂技术扩展 ,指出了目前复杂技术研究明显不足 ,还指出了基础理论在过程变量控制方面的研究严重滞后 ,在一定程度上影响了想象训练研究的进一步深化。本文为想象训练的研究和应用提供了有益的综合信息。  相似文献   

College course scarcity and time to degree     

《Economics of Education Review》2014

College students are taking longer to earn baccalaureate degrees now than ever before, but little is known about institutional factors that may contribute to this trend. In this paper we investigate an important institutional constraint—course scarcity—that we hypothesize may be associated with increased time to degree. We employ a unique administrative dataset from a large, moderately selective, public institution and use an instrumental variables approach, identifying off the random registration times assigned to students. Results suggest that course scarcity does not delay students’ graduation. We explore alternative explanations for our findings and discuss a variety of other factors correlated with time to baccalaureate completion.  相似文献   

Does working during higher education affect students’ academic progression?     

《Economics of Education Review》2014

This paper examines the effect of working during higher education on academic progression, in terms of number of credits acquired by first-year university students in Italy. We discuss different contrasting hypotheses on the role of employment during university on academic outcomes: the zero-sum perspective, the reconciliation thesis, the positive and the negative selection to work hypotheses. In the empirical part we analyze data from the Eurostudent survey, which collected data on a representative sample of university students who were enrolled in the academic year 2002/03, after the implementation of the ‘Bologna Process’. We use a negative binomial regression model considering work experience as an endogenous multinomial treatment. Results indicate that, conditional on observed covariates (socio-demographic variables, school-related and university-related variables), there is a positive self-selection into employment, especially for low-intensity work. Traditional multivariate regressions show a penalty in academic progression only for high-intensity workers, but once accounted for unobserved heterogeneity also the low-intensity work experience appears to negatively affect academic progression.  相似文献   

A multi-criteria approach for the group assessment of an academic course: A case study     

《Studies in Educational Evaluation》2015

The present paper aims at proposing a structured methodology to evaluate the results of an academic training course addressed to postgraduate students. The evaluation process intends to identify the efficacy of an education course by means of a comparison between the general objectives and the results expected by the students. Since the evaluated aspects by the students, detected by means of questionnaires, are both quantitative and qualitative, the proposed methodology is based on the analytic hierarchy process (AHP). In order to facilitate the evaluation process, answers have been modelled by means of linguistic variables. In particular, different evaluation scales have been used and each one is characterized by different levels associated to different fuzzy numbers.  相似文献   

最优购书量的讨论     

蔡述健 《宁德师专学报(自然科学版)》2006,18(3):231-233

运用概率论和微分学的知识,讨论在一定的广告费用和书本贮存费用的情况下,根据图书的购进价和售出价确定书店的最优购书量．  相似文献   

NTM方法在非线性贝叶斯动态模型中的应用     

高汝召  边平勇  赵衍才 《周口师范学院学报》2007,24(5):37-39

将NTM方法应用于非线性贝叶斯动态模型，给出了它的递推公式以及随机变量的数字特征的计算，与蒙特卡洛方法相比提高了效率和精度.  相似文献   

学生个体差异:研究方法与基本结构     

曾继耘 《课程.教材.教法》2006,(3)

对课堂教学中学生个体差异的研究主要有两种方法:一是类型化研究,二是差异变量分析。其中差异变量分析是全面动态把握学生个体差异的较好方法。从影响学生学习的主体因素角度来分析,课堂教学中学生的个体差异主要包括基础性差异、动力性差异、操作性差异和方向性差异等四个方面,它们共同构成了课堂教学中学生个体差异变量的分析框架,为我们全面检视课堂教学中学生个体差异的真实状况提供了有效的检视工具。  相似文献   

Assessing and Controlling Acquiescent Responding When Acquiescence and Content Are Related: A Comprehensive Factor-Analytic Approach     

Pere Joan Ferrando  Fàbia Morales-Vives  Urbano Lorenzo-Seva 《Structural equation modeling》2016,23(5):713-725

This article proposes procedures for assessing and controlling acquiescence in personality scales when acquiescence is related to the content that the scale intends to measure. Our proposal is comprehensive in that it can be applied to different item response formats fitted with response models that can be parameterized as factor-analytic models. In the calibration stage, our proposal makes joint use of a balanced scale and a set of markers for acquiescence, and consists of 2 sequential procedures: a direct semirestricted solution, and a restricted solution with minimal identification constraints. In the scoring stage, we discuss how the information given by the acquiescence–content relation can be used to obtain Bayes expected a posteriori scores. The robustness of the direct procedure is assessed both analytically and by simulation. A free, user-friendly program that implements the procedures proposed is made available. Practical issues of use and interpretation are discussed and illustrated with an empirical application.  相似文献   

Domain Coloring and the Argument Principle     

Frank A. Farris 《PRIMUS》2017,27(8-9):827-844

Abstract

The domain-coloring algorithm allows us to visualize complex-valued functions on the plane in a single image—an alternative to before-and-after mapping diagrams. It helps us see when a function is analytic and aids in understanding contour integrals. The culmination of this article is a visual discovery and subsequent proof of the Argument Principle, which relates the count of poles and zeros of a meromorphic function inside a contour to the accumulated change in argument of the function around the contour. Throughout, I offer connections to standard learning goals of courses in complex variables.  相似文献   

费歇判别法在乳房癌诊断中的应用   总被引：3，自引：0，他引：3  

钟绍军  叶小青 《黄冈师范学院学报》2004,24(3):27-31

研究了乳房肿瘤的分类问题，通过对500个已知肿瘤性质(良性或恶性)细胞核的显微图像的10个量化特征进行统计分析，利用费歇判别法，建立了费歇判别模型，给出了判别准则，对未知乳房肿瘤性质的病例进行了成功的诊断；最后对变量进行了合理的缩减．本方法具有良好的实用性和操作性．  相似文献