四元六次对称多项式不等式探讨   总被引：2，自引：4，他引：2  

刘保乾 《广东教育学院学报》2006,26(3):6-12

对四元六次对称多项式不等式的分拆进行了初步探讨；证明了若干拆分基不等式和含参不等式；最后提出了若干问题。  相似文献   

离散大系统关于部分变元指数稳定性     

刘碧玉 《湘潭师范学院学报(社会科学版)》1990,(3)

本文利用向量Л(?)ПУНОВ函数讨论了一类离散大系统关于部分变元的指数稳定和关联指数稳定。获得了一些新的代数判据改进了文[ ]等的工作。  相似文献   

微积分学L’Hospital法则的推广研究     

成连连  郭红梅 《黄冈师范学院学报》2012,(3):4-6

本文将一元函数L’Hospital法则进行研究推广,在柯西中值定理的基础上建立多元函数L’Hospital法则,使L’Hospital法则的应用更广泛。  相似文献   

Cognitive,Affective, Personality,and Demographic Predictors of Foreign-Language Achievement     

《The Journal of educational research》2012,105(1):3-15

Abstract

The ability of cognitive, affective, personality, and demographic variables to predict second-language acquisition among college students was investigated. An all possible subsets regression analysis was used to compare the proportion of variance in foreign-language achievement explained by each variable. The analysis revealed that variables from each of the 4 domains were important predictors of foreign-language achievement. Overall, academic achievement, as measured by GPA average, was the best predictor, explaining 11.5% of the variance in foreign-language achievement. Foreign-language anxiety, the next best predictor, explained 10.5% of the variance. The educational implications of these findings for understanding foreign-language achievement are discussed, along with suggestions for future research.  相似文献   

新课改下的生物实验教学     

李金平 《大观周刊》2012,(40):134-134

生物学作为一门以实验为基础的科学,课程倡导以观察、调查和实验为主的探究性学习方式。生物实验是探究性学习的主要内容,它既是过程、又是方法,有助于培养学生的各种能力,提高学生的科学素养。因此生物实验教学的成功是生物教学有效性的核心内容之一。本文重点分析了在新课改下如何有效的开展生物实验教学,如何使实验教学能最大限度的调动学生学习的学习主动性,激发学生的求知欲望。  相似文献   

指导下习得在外语教学中的应用     

赵广发 《南昌教育学院学报》2012,(7):166-167

外语(即第二语言)能力的获得途径长久以来一直是语言学家和语言教学者长期以来争论的焦点。本文结合外语教学实践把外语习得和学习有机地结合起来,生成第三条途径,也就是指导下学习,并进行了可行性论证。  相似文献   

Participant characteristics and process variables predict attrition from a home-based early intervention program     

Tilman Brand  Tanja Jungmann 《Early childhood research quarterly》2014

Although advocates of home visits claim that they improve access to preventive interventions for socially disadvantaged families, home visiting programs often report high dropout rates. This study investigated factors predicting attrition in a sample of 434 low-income, first-time mothers in a German program modeled on the Nurse–Family Partnership program. Both participant characteristics and process variables associated with attrition were examined. The results indicated that 38.5% of the mothers left the program before completing 75% of the enrollment time; 62% of those left for addressable reasons (e.g., losing interest in program participation). Arguably, these participants might be retained through program modifications. Almost half of the dropouts left the program before completing 25% of the enrollment time. Program dropouts were younger and did not experience pregnancy-related risks. With regard to process variables, a high frequency of unsuccessful visit attempts and low maternal engagement during the home visits increased the risk for attrition. Self-referral, a high percentage of time spent on parenting issues as well as a high percentage of grandmother participation during visits contributed to participant retention. Among mothers with a high number of risk factors for child abuse and neglect, partner (husband or boyfriend) participation during visits positively influenced the retention rate. Since process variables explained a larger amount of variance in attrition compared to participant characteristics, it is reasonable to focus on the intervention processes when trying to reduce attrition.  相似文献   

Predicting On-Line Catalog Terminal Needs     

《College & Undergraduate Libraries》2013,20(2):99-106

Abstract

To determine if research findings from large academic, research libraries on the number of public access terminals needed apply to smaller libraries, the author compared results of a study done at a large research institution to one done at a mid-sized university. The data were different. This is important because the active automation market is currently thriving at smaller libraries, not larger ones, and because environment/size does seem to be critical to the consideration of automation parameters. Thus, smaller libraries should establish their own parameters and employ models generated at large institutions only as a general recipe.  相似文献   

改进的H—r可积下随机变量的弱大数定律     

施明华  岳芹  赵义超 《泰安师专学报》2013,(3):51-55

本文将Cesaro α一致可积进一步弱化,给出一种H—r一致可积概念．并利用一些重要的概率不等式,给出了H—r一致可积下随机变量序列的弱大数定律．  相似文献   

La influencia de variables cognitivas en el recuerdo de cuentos y su valoración en función de la edad     

José A. León  Alvaro Marchesi 《Infancia y Aprendizaje》2013,36(37):19-31

Resumen

Esta investigación analizó la memoria a través del recuerdo de cuentos bajo la manipulación de variables cognitivas en niños de 6, 8 y 10 años. Siguiendo la gramática de la historia según Stein y Glenn, se diseñaron tres cuentos sencillos con contenidos bien diferenciados. Cada historia poseía además dos finales (final feliz y final triste). Participaron un total de 108 niños y sus respuestas fueron registradas en un análisis factorial mixto con dos factores intersujetos (edad y sexo) y tres factores intrasujetos (contenido, final y categoría gramatical). Los resultados resaltan la importancia que el contenido ejerce no sólo en el recuerdo del mismo, sino también en los distintos finales presentados.  相似文献