以线段长为方程根的中考题析解     

朱书民 《张家口职业技术学院学报》2006,19(2):22-24

以两线段长为一元二次方程的根的问题的解法，是把一元二次方程与几何问题直接挂钩。沟通了几何与二次方程之间的联系。  相似文献   

合理计算 巧解妙证     

张启通 《河北北方学院学报(社会科学版)》1995,(5)

通过对中学教学中若干例题特征的观察、分析,条件的适当转化,说明了如何巧解妙证一些数学题。  相似文献   

析体育理论课程测验的质量指标     

沈钧毅  张宗豪 《山西师大体育学院学报》2003,18(3):36-37

根据教育统计学讨论了评价体育专业学生理论课程测验的四个质量指标。这些指标都可以通过统计的方法加以量化，有了这些指标，就可以比较客观地反映教育测验的质量。  相似文献   

滑雪旅游目的地差异化营销策略探讨   总被引：4，自引：0，他引：4  

曹继宏 《昆明大学学报》2006,17(2):72-74

滑雪技能水平与其社会人口统计特点交叉影响着潜在滑雪旅游者的市场需求强度以及旅游决策。本文从市场需求分析出发对滑雪旅游目的地的差异化营销策略做出了初步研究,指出滑雪旅游目的地只有找准市场定位,并通过有效的产品服务组合,树立和保持其良好的市场形象,并通过独特的渠道为潜在游客提供差异化的滑雪体验价值,才能进一步赢得市场的认同,实现目的地的可持续发展。  相似文献   

主题图书馆服务用户满意度实证研究——以广州图书馆语言学习馆为例北大核心CSSCI     

蒋知义  郑洁洵  邹凯 《图书馆杂志》2022,(1):60-66

本文总结了主题图书馆服务用户满意度影响因素,并以广州图书馆语言学习馆为研究对象展开实证调查,运用结构方程模型方法研究各影响因素之间的关系。研究发现:专藏资源、馆员服务和主题活动对用户满意度有正向相关关系;主题活动对专藏资源满意度有正向相关关系;空间环境和宣传推广对主题活动满意度有正向相关关系。  相似文献   

Jacobi与Gauss—Seidel迭代法求解线性方程组收敛性比较与研究   总被引：1，自引：0，他引：1  

王育琳贺迅宇  张尚先 《株洲师范高等专科学校学报》2004,9(5):30-32

Jacobi迭代法和Gauss-Seidel迭代法是计算机求解线性方程组常用的两种迭代法,但是这两种方法对方程的收敛性要求很严,大部分方程组均不能用以求解.给出一些基本技巧:对于简单的2阶方程组,若Jacobi法与Gauss-Seidel法均发散,可交换其两行求得其解;对一般性方程,给出一个应用性较强的定理,将方程Ax=b ATAx=ATb,可以用Gauss-Seidel求得任何｜A｜≠0方程组的解.  相似文献   

范德瓦耳斯气体的临界指数β=1/3     

田国瑞 《新乡师范高等专科学校学报》2006,20(2):11-12

从范德瓦耳斯气体的对比态方程出发,推导出临界指数的数值为1/3,与实验值相近。  相似文献   

中立型泛函微分方程正周期解的存在性     

刘兴元 《怀化学院学报》2007,26(5):1-4

应用锥上不动点理论讨论了一类包含许多时滞人口模型的泛函微分方程的正周期解的存在性.  相似文献   

The effect of television viewing on ethnic prejudice against immigrants: A study in the Italian context     

《Int J Intercult Relat》2015

Television viewers construct many different meanings from the programs they watch. Here, we investigated whether ethnic prejudice is differentially influenced by the genre of television programs in their portrayal of ethnic minorities. We also wanted to determine whether a higher educational level reduces ethnic prejudice and television use. A self-reported questionnaire was administered to 401 Italian adults. Structural equation modeling was used to analyze the relationships between ethnic prejudice and television program contents and educational level. Viewing Reality and Variety Shows was positively related to ethnic prejudice, News and Public Affairs was negatively related, and Films and TV series had no apparent influence on prejudice. Educational level was negatively related to both ethnic prejudice and watching Reality and Variety Shows, and positively related to viewing News and Public Affairs and Films and TV series programs.  相似文献   

Contradictions around differentiation for pupils with dyslexia learning English as a Foreign Language at secondary school     

Maria Rontou 《Support for Learning》2012,27(4):140-149

This article deals with differentiation of teaching methods and extra time in class for pupils with dyslexia by English as a Foreign Language (EFL) teachers in two Greek state secondary schools. Activity theory is applied to analyse the contradictions that emerge around the issue of differentiation for pupils with dyslexia from data compiled from interviews with teachers, pupils and parents and field notes from lesson observations across two schools. The analysis shows that contradictions are created when participants try to achieve their goals for differentiation by lack of teachers’ knowledge, inadequate diagnosis, unclear school and Ministry policy, short duration of lessons and the number of pupils in class. The findings suggest the necessity of teacher training in dyslexia and the improvement of school and Ministry policy.  相似文献