试论皮亚杰的运算逻辑

皮亚杰认为抽象模式是心理学因果解释的一种形式,文章认为皮亚杰所开创的运算逻辑是儿童实际思维发展机制的形式化模型,也是解释儿童认知结构转换规律的抽象模式。     

论历史时期汉水流域的文化政治地位

李家村与龙岗等仰韶文化遗存的分布表明 ,汉水流域是华夏文明的重要发祥地之一。对建都秦岭以北关中平原的周秦汉唐等王朝来说 ,汉水流域一直是第一政治后方 ,起着重要的政治缓冲和后院屏障作用 ;汉水流域历史上曾几度辉煌又几度衰落 ,代表着内陆腹地区域发展的一个典型 ;而作为沟通与中原、中南与西部的交通大动脉 ,又与中国的西部的开发具有重要意义。     

行政哲学研究对象再探讨--从"回归现实生活世界"的角度分析

近年来,在国内外学术界都出现了加强行政哲学研究的趋势。行政哲学已经成为行政学界关注的一个热点领域,并产生了为数不少颇具价值的理论成果。然而,行政哲学在我国的研究历程毕竟还相当短,理论研究的诸多方面尚未取得普遍共识。本文对国内关于行政哲学研究对象的观点进行了集中梳理,在对这些观点的认识的基础上,从马克思回归现实生活世界的角度重新界定了行政哲学的研究对象。     

方位词"上下"的汉英对比分析

语言中方位的表达方式体现了人们对空间关系的基本认识.对某一具体的空间关系,汉英语中的表达形式可能互有异同,这体现了两种语言的使用者在认识上的差异.本文对方位词"上下"在汉英语中表达法的某些典型异同及其原因进行比较分析.     

Effects of psychosocial variables in the similarity and interdependence of physical activity levels among adolescent best friend dyads

Given that physical activity (PA) tends to decrease with age during adolescence, addressing factors that affect change is important. This study examined the similarity and interdependence of PA as influenced by psychosocial factors among adolescent best friend dyads. A total of 660 adolescents, representing 330 best friend dyads, completed questionnaires with regard to PA, sitting time, perceived exercise benefits and barriers, physical self-perception and social support for PA. Dyads were also identified as reciprocal and non-reciprocal best friends; reciprocal means that both considered each other best friends and non-reciprocal were those in which only one considered the other a best friend. Data were analysed using a hierarchical linear model framework. Results indicated significant similarities between reciprocal best friend dyads for PA and sitting time, and for sitting time in non-reciprocal best friends (P values <.01). Psychosocial variables were associated with PA in reciprocal best friend dyads and with sitting time in reciprocal and non-reciprocal best friend dyads. Best friend gender, regular sports practice of the person, perceived exercise barriers of the best friend and best friend social support were the best predictors for PA.     

Coordination pattern of baseball pitching among young pitchers of various ages and velocity levels

This study compared the whole-body movement coordination of pitching among 72 baseball players of various ages and velocity levels. Participants were classified as senior, junior, and little according to their age, with each group comprising 24 players. The velocity levels of the high-velocity (the top eight) and low-velocity (the lowest eight) groups were classified according to their pitching velocity. During pitching, the coordinates of 15 markers attached to the major joints of the whole-body movement system were collected for analysis. Sixteen kinematic parameters were calculated to compare the groups and velocity levels. Principal component analysis (PCA) was conducted to quantify the coordination pattern of pitching movement. The results were as follows: (1) five position and two velocity parameters significantly differed among the age groups, and two position and one velocity parameters significantly differed between the high- and low-velocity groups. (2) The coordination patterns of pitching movement could be described using three components, of which the eigenvalues and contents varied according to age and velocity level. In conclusion, the senior and junior players showed greater elbow angular velocity, whereas the little players exhibited a wider shoulder angle only at the beginning of pitching. The players with high velocity exhibited higher trunk and shoulder rotation velocity. The variations among groups found using PCA and kinematics parameter analyses were consistent.     

具有非期望输出决策单元的有效性评价

针对具有非期望输出决策单元DMU的相对有效性 ,提出对其进行评价的非径向FDEA模型 ,并给出模型的相对有效性理论证明 .结合实际算例 ,指出FDEA模型在实际生产过程中对于节约生产资源 ,提高期望输出 ,降低非期望输出 ,特别是减少环境污染有重要应用价值 .     

我国图书出版的经济效应--基于面板向量自回归的脉冲分析

运用面板向量自回归模型分析后发现：东部地区图书出版对经济增长带来了“先增强后减弱”的正向冲击效应,中部地区的冲击效应既不明显也不稳定,西部地区则呈现负向冲击效应。同时,东部地区出版产业的延伸和知识的外溢使得全国的图书出版带来经济的有效增长。但是,这一效应主要是通过“产业渠道”而非“传播渠道”传导的,这就使得图书出版数量上的扩张只是带动了出版产业的发展,而未能带来出版知识快速且有效的转化。     

关爱教育的教学实施模式

关爱教育是学校德育的主旋律 ,人性关怀反映了德育人本化的趋势 ,关怀取向是对公正取向的合理补充。关爱教育本质上是一种情感教育 ,以情感体验与关爱实践为基本特征。关爱教育模式是以体验式学习建构的道德互动性结构化整体 ,包括情境体验、价值辨析、活动践行三种基本课型。关爱教育的实施需采取渗透性策略、生态性策略、仪式化策略与随机性策略。     

智慧城市整体建模技术初探

为破解智慧城市分行业垂直构建信息系统带来的信息资源分散整合的难题,本文提出一个新的解决方案, 即运用“分层构建、横向整合、模型聚合、平行演进”的机制,模仿智慧生命体的层次架构对智慧城市进行层次化的建 模设计,使得在现实城市中纵向分布的信息资源,在信息系统的虚拟城市模型中得到横向的大整合,发掘出一项在云 计算和大数据的环境下,可对垂直构建的信息系统进行具有兼容性、诱导性和可演进性的整体架构设计的新技术