Illustrating Regression Concepts     

Markku Nurhonen  Simo Puntanen 《Teaching Statistics》1992,14(1):20-23

Modern microcomputers offer attractive possibilities to illustrate various concepts related to regression. In this article we describe how this can be achieved.  相似文献   

信息熵在多项选择题质量分析中的应用     

杜鹏东  孙涛  田振清 《现代教育技术》2006,16(3):36-39

多项选择题是各种测试中使用的较为广泛的题型之一,施测后对题目各选项的有效性做出判断可为评价测试质量提供重要参考依据。本文由分析多项选择问题的信息熵入手,给出多项选择题等价选法个数d的计算公式。同时,对多项选择题之间的质量比较问题,给出了使用相对熵的比较方法。  相似文献   

Multiple description coding with spatial-temporal hybrid interpolation for video streaming in peer-to-peer networks     

YAO Jason  CHEN Homer H 《浙江大学学报(A卷英文版)》2006,7(5):894-899

INTRODUCTION Multimedia services over the Internet are be- coming popular due to the widespread deployment of broadband access. However, the conventional cli- ent-server architecture severely limits the number of simultaneous users, especially for bandwidth inten- sive applications such as video streaming. P2P net- works, on the other hand, offer a solution to the scalability problem. As a node joins a P2P network, it not only consumes resources but also contributes its bandwidth or comp…  相似文献   

论教育评价理论与实践的基本走向   总被引：1，自引：0，他引：1  

章谋斌 《湖北广播电视大学学报》2006,23(6):148-149

当前,有关教育评价理论与实践的概念逻辑性不强,并且有些概念的提法有失偏颇,针对此种现象,本文从教育理论的特点出发,在此基础上,着重探讨教育评价各组成部分在这些理论的影响下的基本走向。  相似文献   

Cooperative co-evolution based distributed path planning of multiple mobile robots     

王梅  吴铁军 《浙江大学学报(A卷英文版)》2005,6(7):697-706

This paper proposes novel multiple-mobile-robot collision avoidance path planning based on cooperative co-evolution, which can be executed fully distributed and in parallel. A real valued co-evolutionary algorithm is developed to coordinate the movement of multiple robots in 2D world, avoiding C-space or grid net searching. The collision avoidance is achieved by cooperatively co-evolving segments of paths and the time interval to pass them. Methods for constraint handling, which are developed for evolutionary algorithm, make the path planning easier. The effectiveness of the algorithm is demonstrated on a number of 2D path planning problems.  相似文献   

The pedagogical potential of drawing and writing in a primary science multimodal unit     

Rachel E. Wilson  Leslie U. Bradbury 《International Journal of Science Education》2016,38(17):2621-2641

In consideration of the potential of drawing and writing as assessment and learning tools, we explored how early primary students used these modes to communicate their science understandings. The context for this study was a curricular unit that incorporated multiple modes of representation in both the presentation of information and production of student understanding with a focus on the structure and function of carnivorous plants (CPs). Two science teacher educators and two first-grade teachers in the United States co-planned and co-taught a multimodal science unit on CP structure and function that included multiple representations of Venus flytraps (VFTs): physical specimens, photographs, videos, text, and discussions. Pre- and post-assessment student drawings and writings were statistically compared to note significant changes, and pre- and post-assessment writings were qualitatively analysed to note themes in student ideas. Results indicate that students increased their knowledge of VFT structure and function and synthesised information from multiple modes. While students included more structures of the VFT in their drawings, they were better able to describe the functions of structures in their writings. These results suggest the benefits for student learning and assessment of having early primary students represent their science understandings in multiple modes.  相似文献   

辐角函数的研究     

王彩凤  尹树玲 《运城学院学报》2005,23(5):17-18

利用集合来定义辐角函数，研究幅角函数的存在性、连续性、可微性等性质。  相似文献   

多元智力理论中隐含的"智慧"观--中国古代智力观和多元智力理论的比较   总被引：1，自引：0，他引：1  

詹丽峰 《韩山师范学院学报》2005,26(5):21-24,29

加德纳的多元智力理论是一种教育哲学思想,这种哲学思想不仅试图解释“智力”的结构,而且还包含了“智慧”观念.西方传统智力理论“简洁”结构的主核是语言和数理能力,加德纳拓展了智力的内涵,使其更接近“智慧”的概念,这与中国传统智力观有许多呼应之处.  相似文献   

本溪地区人口预测的数学模型   总被引：1，自引：1，他引：1  

迟灵芝 《辽宁科技学院学报》2001,3(3):39-41

根据回归分析和灰色系统理论，利用本溪地区1990－1999年人口总数的统计资料，建立了本溪地区人口总数预测的数学模型，并通过对本溪地区人口总数预测的数学模型，验证了使用本文介绍的方法所得到的预测结果是较为符合实际的。  相似文献   

潜藏在水下的冰山——《终成眷属》中的召唤结构     

刘俊杰 《聊城师范学院学报》2006,(6):96-97,95

《终成眷属》的表层存在“爱情与偏见”的冲突。但从结构、情感两个层面分析后，我们可以从表层的冲突中发现伊瑟尔的“召唤结构”，这给我们提供了另一种审美空间，有助于更好地理解作品的主题。  相似文献