Using context to classify variables     

Lawrence M. Lesser 《Teaching Statistics》2013,35(1):29-31

  相似文献   

基于TMS320F2812事件管理器的一种测频方法     

李斌  钱伟  陈西迎  王磊  赵震 《科技广场》2008,(1):236-238

本文设计了一套以TI公司TMS320F2812芯片为控制核心的频率测量装置。文章利用其片内外设事件管理器的捕获功能,给出了一种简单的测频方法,其硬件电路大为简化,测频装置的可靠性极大提高,而且测频精度较高,提高了发电机励磁调节的可靠性和控制精度。  相似文献   

直放站的设计与调测     

胡明仁 《科技广场》2009,(1)

直放站在移动通信网络优化中应用越来越广泛.本文从工程实例出发,介绍了直放站的设计和调测流程,并给出了相关的经验数据.  相似文献   

因特网AS级拓扑测量和分析的进展     

吴玲  黄宝惠  魏镇韩 《人天科学研究》2009,(7)

测量和分析因特网AS级拓扑是研究因特网宏观特征和选路行为的基本手段。概述了两种测量AS级拓扑的方法,即从包含BGP选路信息的数据中发现AS级拓扑和从traceroute测量数据生成AS级拓扑;对比了不同测量数据的涵义和完整性;综述了多种分析因特网拓扑特性的测度;讨论了AS商业关系及相关选路行为的研究现状;给出了当前面临的技术挑战。  相似文献   

论1∶2.2∶2.2~2规律在社科图书馆的运用     

夏明顺 《中国图书馆学报》2000,26(2):92-93，64

提出了核心著作测定的具体步骤 ,指出核心著作测定应注意的事项 ;在此基础上研究了核心著作理论在社科图书馆的采购、剔旧、管理以及优秀著作之鉴定与预测等方面的具体运用。参考文献 1。  相似文献   

影响血液尿素测量值的实验室因素     

申醒 《武汉体育学院学报》1999,(5)

观察了实验室自然光照对二乙酰一肟法测定血尿素结果的影响。发现光照对测量结果有显著影响。提示测量过程中要避免室外光直接照射  相似文献   

体育测量评价的意义与局限   总被引：2，自引：2，他引：2  

姜达维 《天津体育学院学报》1999,14(1):66-67

通过讨论体育测量评价的作用与发展、发展特点以及局限,作者认为：体育测量评价是伴随着体育产生和发展起来的,我国体育教育专业引进的该学科起点高、发展快,但是必须慎重对待其方法的局限性及其与其它学科的相关关系,使用时要以科学的方法论为指导  相似文献   

Towards an operationalized and effective school self-evaluation system: An ongoing action research study in Chinese secondary schools since 2011     

《Studies in Educational Evaluation》2019

School self-evaluation (SSE) is an effective mechanism that helps schools to put in place strategies to improve an aspect of school quality. By implementing an action research study of SSE in 24 Chinese secondary schools across seven cities since 2011, the present study generalizes and proposes an operationalized and effective SSE system to illustrate how to operationalize SSE effectively. The system was developed in three essential parts: (a) constructing the measurement model of SSE, which included identifying the framework and indicators to determine the primary evaluation contents, and designing operational evaluation modules to apply SSE indicators to school practices and integrate them into routine school operations; (b) establishing a cooperation mechanism between internal SSE groups and external “facilitative friends” to conduct SSE with different roles allocated; and (c) summarizing detailed implementation procedures and key strategies to implement a cyclical, regular and sustainable SSE process step by step.  相似文献   

Revisiting the dimensionality of subjective task value: Towards clarification of competing perspectives     

《Contemporary educational psychology》2020

Expectancy-value researchers have described the components of subjective task value in multiple ways, leading to multiple competing structural representations of subjective task value data. The purpose of this study was to examine these competing multidimensional factor structures by comparing correlated factor, hierarchical, and bifactor representations of both confirmatory factor analysis and exploratory structural equation modeling (ESEM) models across three theoretical conceptualizations of subjective task value. Results indicate that, in an undergraduate life science learning context (n = 334), the best representation for subjective task value data was a bifactor ESEM model that allowed for the disentangling of general and specific variance of general subjective task value, specific value beliefs, and specific costs. Full measurement invariance of the retained structure across continuing generation and first-generation students was found, and no differential item functioning was found across gender. General subjective task value and specific opportunity cost significantly and positively predicted achievement and specific utility value significantly and negatively predicted achievement, providing support for the criterion-related validity of the general and specific factors for predicting achievement outcomes.  相似文献   

对我国甲级女排人际关系现状的初步研究   总被引：4，自引：0，他引：4  

沈跃进 《武汉体育学院学报》2001,35(4):23-25

采用莫雷诺社会测量法，对我国甲级女子排球队的人际关系进行了调查与测量。通过对问卷调查结果的统计处理与逻辑分析，初步地反映了我国女排人际关系的基本现状和人际关系的结构及存在的问题和形成的原因，以期为我国女排的科学训练、比赛及管理提供参考依据。  相似文献