How specific is the shape bias?     

Diesendruck G  Bloom P 《Child development》2003,74(1):168-178

Children tend to extend object names on the basis of sameness of shape, rather than size, color, or material-a tendency that has been dubbed the "shape bias." Is the shape bias the result of well-learned associations between words and objects? Or does it exist because of a general belief that shape is a good indicator of object category membership? The present three studies addressed this debate by exploring whether the shape bias is specific to naming. In Study 1, 3-year-olds showed the shape bias both when asked to extend a novel name and when asked to select an object of the same kind as a target object. Study 2 found the same shape bias when children were asked to generalize properties relevant to category membership. Study 3 replicated the findings from Study 1 with 2-year-olds. These findings suggest that the shape bias derives from children's beliefs about object kinds and is not the product of associative learning.  相似文献   

人民币汇率波动对中国出口商品结构的影响分析     

饶春燕 《茂名学院学报》2016,(4):61-64

从人民币实际有效汇率波动趋势和我国出口商品结构现状出发,建立时间序列模型分析人民币实际有效汇率波动对我国出口商品结构存在的影响。实证结果表明,人民币实际汇率升值有助于我国出口商品结构的改善。并结合当前我国出口商品结构存在的问题,提出了改善我国出口商品结构的建议。  相似文献   

影响高中生物教师教学水平的几个主要因素     

饶有生  宋显群 《江西教育学院学报》2004,25(3):96-98

影响高中生物教师教学水平的因素有很多,但就我省高中生物教学的实际情况而言,主要是教师的教学观念、教师的专业知识水平、教师的科学研究能力三个方面。如何在这三个方面不断丰富和完善自我的问题应该成为广大高中生物教师共同关注的课题。  相似文献   

严格单调函数复合而成的函数增减性的讨论     

饶鑫光 《河池学院学报》1987,(1)

若干个在其定义域区间上严格单调的函数按一定次序进行复合,所得的复合函数其增减性与中间变量(中间函数)的增减性密切相关。本文由函数的复合满足结合律出发,推导出两者之间的联系规律:若复合过程的中问函数有奇数个减函数,则复合所得函数为减函数;若复合过程的中间函数中有偶数个减函数,则复合所得函数为增函数。这就提供了在已知中间变量(中间函数)增减性的条件下,判断多重复合函数增减性的简便方法。  相似文献   

Jane Eyre     

饶帮早 《中学生英语》2002,(10):27-27

Young Jane Eyre was orphaned(成为孤儿） and sent to live with her uncle,who died shortly after her arrival.Her stepaunt despised(讨厌） her and sent her to Lowood School so that she could become a governess(家庭教师）。She was the friendship of everyon there,but her life was difficult because conditions were poor at the school.  相似文献   

非奇Toeplitz型上三角矩阵的线性分解及应用于对称式的若干结论(Ⅱ)     

饶鑫光 《河池学院学报》1992,(3)

本文是作者文的继续。在文中,提出了非奇 Toeplitz 型上三角矩阵的线性分解的概念,并给出了如下结论:每个阶数≥2的复数域上的非奇 T 型上三角矩阵在复数域上都可唯一地线性分解。本文提出了 n 元有重复组合 k 次齐式(n 元重组 k 次齐式)、一元多项式根的重组 k 次齐式的概念,利用文的结论,推导出一元 n 次多项式根的重组 k 次齐式与根的初等对称多项式两者之间的联系公式,推导出一元 n 次多项式根的重组 k 次齐式与一元多项式系数构成的 T 型上三角矩阵的逆阵两者之间的联系规律,并给出根的重组 k 次齐式的系数行列式表示。  相似文献   

新编初中数学第六册简介     

吕学礼  谭鼐  孙福元  翟连林  饶汉昌  李琳 《天津教育》1980,(2)

全日制十年制学校初中课本《数学》第六册即将出版发行,开始试用。下面将这一册书作一简单介绍,并谈谈我们编写时的一些想法,不当之处请批评、指正。本册是初中阶段的最后一册,包括“函数及其图象”、“直线和圆的方程”、“统计初步”、“视图”(作为选学内容)四章。另外书末还有一个附录“初中阶段总复习参考题”,供复习整个初中阶段内容时参考选用。在本册中安排这些内容,有下面的一些考虑。大家知道,目前我国中小学是十年制。其中小学五年,初中三年,高中两年。从当前情  相似文献   

Geneticists told to sing for their supper     

Brown P 《New scientist (1971)》1991,131(1784):8

  相似文献   

ON THE REE ACROSS THE PERMIANTRIASSIC BOUNDARY IN SOUTH CHINA     

Zhou Yaoqi Chai Chifang Mao Xueying Ma Shulan Ma Jiangguo 《中国科学院研究生院学报》1992,(2)

This paper discusses the INAA results of REE in clays atand near some Permian/Triassic boundaries of South China.It showsthat the REE patterns of boundary clays differ from those of non-boundary clays.One difference is that the boundary clays are moreenriched in LREE,with steeper slope of REE and a smaller Eu nega-tive anomaly than the non-boundary clays.Another difference is that theboundary clays show a small Ce negative anomaly,but no Ce anomalyoccurs in the non-boundary clays.From these REE patterns and some other experimental facts,it isproposed that the P/T boundary clay may be a mixed product consistingof the acidic-intermediate ash and the upper crust substance representingsputtering component,and the calculated fraction of the former andlatter is 7/3.  相似文献   

海军的新型声纳会伤害鲸鱼吗     

MichaelW．Robbins  张帆 《科学与生活》2003,(5):65-65

经过多年的争论，国家海洋渔业机构于去年夏天批准美国海军使用新型低频声纳系统查找敌方潜艇的位置。这一许可促使自然资源保护委员会和一个由其他环境组织组成的联盟向联邦法院控告海军，称这种声纳将对海洋生命造成巨大的危害。  相似文献