【摘 要】
:
Mathematics is believed to be the most universal ability of human beings and some researchers further verified that mathematics would be one of the most innate human abilities that can be bom-with and
【机 构】
:
National Taichung University , Taiwan Beijing Nor
论文部分内容阅读
Mathematics is believed to be the most universal ability of human beings and some researchers further verified that mathematics would be one of the most innate human abilities that can be bom-with and created-in the brain.Some said that mathematies would be the most likely communicative tool between heterogeneous groups, including creatures fiom outer spaces (Devlin, 2014).In contrast, language is also believed as the most unique ability of all mankind yet it is so much varied and masked by different cultures; as a results, subjects could not communicate effectively if they were belonged to different languages.Mathematics in classrooms and schools is to be discussed and taught by using the local or native languages.How will the languages play effects on perceiving and communicating mathematics?
其他文献
半导体光催化氧化技术利用太阳能将环境中的有机物降解为水和二氧化碳,涉及环境和能源问题,是目前发展最好的领域之一.在空气净化、废水处理、杀菌除臭、自清洁等方面具有广阔的应用前景.半导体光催化材料降解有机污染物具有反应温和高效、操作简便易控以及环境友好等特性,日益受到人们的关注.本文研究了在目前的半导体光催化材料中,TiO2作为一种应用广泛的光催化剂,具有化学性质稳定、耐酸碱性好、无毒性、氧化能力强而
本文采用密度泛函的DFT方法,在B3LYP/6-31G(d,p)理论水平上以Curran研究团队的实验研究为基础,对氮杂环卡宾叠氮化硼和不对称烯烃的[3+2]环加成立体选择性和反应机理进行了系统研究,分别选择不对称烯烃CH2=CHCOOCH3,CF2=CFCF3,CH2=CHCOCH3作为研究对象,按照不同进攻方式分别给出了两条可行的反应通道,从反应活化势垒很明显能够看出只有一条反应路径活性较高,
在现代工业和生活中,金属腐蚀已成为极为严重的破坏因素,遍及各个工业部门,为了抑制金属的腐蚀,采用缓蚀剂是一种经济有效的防腐蚀方法,新型缓蚀剂的开发多侧重在化工、医药副产品和植物、水生植物中提取物,如大蒜提取物、中药残渣等是近年来新开发的缓蚀剂.为了顺应清洁生产和环境友好经济的要求人们考虑将一些医药及其副产品应用于缓蚀剂,并且做了大量的研究,得到很好的效果.本文的甲硝唑、奥美拉唑及酮康唑是三种常见的
将醇氧化为相应的羰基化合物的反应,无论是在有机合成化学中,还是在工业上都有十分重要的意义,其在中间体的合成和精细化学品工业中有着广泛的应用.本文以西北特有的黄土为催化剂,Oxone(R)为氧化剂,在水相中实现对苯甲醇的催化氧化.传统的氧化工艺大多采用化学计量的过渡金属氧化物,如铬酸盐、高锰酸盐等,并且在有毒的有机溶剂以及苛刻的反应条件下进行的.这些物质一方面由于不可避免地造成环境污染或后处理费用增
本文通过表面引发原子转移自由基聚合(SIP-ATRP)成功的在粗糙氧化铝上修饰,pH敏感的弱酸性聚合物:聚甲基丙烯酸(pMAA),和弱碱性聚合物:聚甲基丙烯酸N,N一二甲氨基乙酯(pDMAEMA),pMAA在碱性环境中去质子化而成伸展状态,在酸性环境中质子化而成收缩状态,所以pMAA修饰表面呈现出对碱性液滴的粘附,而对酸性液滴滚动。弱碱性pDMAEMA修饰表面表现出相反结果,对酸性液滴粘附而对碱性
Previous studies have concentrated on harnessing surface plasmonic effects of metallic nanoparticles (NPs) to improve polymer solar cell performance.Although ample examples have evidenced the viabilit
Two mixed-ligand 1-D coordination polymer ([Zn(4,4-bipy)(4-cba)2] (1) and [Zn(4,4-bipy)(4-cba)3] (2)) were formed from 4-chlorobenzoic acid (4-cbaH) and 4,4-bipyridine (4,4-bipy).Their crystal structu