The completeness property of the set of real numbers in the transition from calculus to analysis

This paper focuses on teaching and learning the set of real numbers R and its completeness property at the university level. It studies, in particular, the opportunities for understanding this property that students are offered in four undergraduate correlative courses in Calculus and Analysis. The theoretical framework used in the study draws on concepts developed in the Anthropological Theory of Didactics, especially the notions of praxeology and mathematical organization. The paper shows different expectations concerning the same notion (R and its completeness) through different school levels, and intends to bring up some reflections about the transition from Calculus to Analysis.

古典诗词中的数字及其英译

全文两部分:第一部分介绍了中国古典诗词中数字的使用与分类,分析了数字在诗词中的修辞功能,提出了欣赏数字艺术功能的主要方法;第二部分从诗词英译实例中归纳出数字英译的四种基本方法,并对不同译法进行了比较和评析.     

电子商务个性化服务手机号码交易平台的研究

作为电子商务个性化服务的一个特例,以人们所普遍使用的手机为基础,针对一部分人对特殊号码的需求,应用时下流行的PHP开发语言,结合关系数据库MySQL,设计开发B2B模式的手机号码交易平台,为普通用户提供购买号码的平台,为号码经销商提供广阔的销售平台。     

论弗雷格的“同一性”理论

同一性是产生哲学困惑的一个常见根源,研究者不乏其人,最初人们都认为同一性就是一个对象与其自身的同一。弗雷格开创了一种与意义理论联系起来的研究同一性问题的方法,即在进行同一性分析时将涵义和指称明确区分开来,这一方法为后来的同一性问题研究奠定了基础。     

Wm∨Pn（n≥5）的点可区别边色数

研究了Wm∨Pn（n≥5）的点可区别边染色,给出了Wm∨Pn（n≥5）的点可区别边色数.     

医学期刊青年编辑应注意培养对数字的"敏感性"

医学期刊青年编辑在稿件编辑中,往往对数字的"敏感性"不高,可能会使各种与数字相关的错误被忽略或是造成新的数字相关性差错,如稿件修回日期与病例收集时间矛盾、病例总数与不同性别病例教之和不等、流行病学调查数据核算差错等等,使稿件和期刊质量受到影响,医学期刊青年编辑应从逻辑性和规范化两方面着手,注意培养对数字的"敏感性".     

Variability in the natural number bias: Who,when, how,and why

When reasoning about rational numbers, people sometimes incorrectly apply principles or rules for natural numbers. Many factors affect whether participants display this natural number bias, including their age and experience, the affordances and constraints of the given task, and even the specific numbers in the given problem. In this paper, we argue that this variability can be conceptualized in terms of dynamic choices among problem-solving strategies. People's strategy choices vary as a function of their repertoire of available strategies and as a function of the specifics of the tasks, problems, and context. Further, we argue that the specific profiles of variability in strategy use that are observed in different participant groups can be conceptualized in terms of the strength and precision of the representations of numbers and operations that people in those groups possess. In our view, the natural number bias arises when people's representations of rational number magnitudes or rational number operations are not sufficiently strongly activated or sufficiently precise to guide performance on a specific task in a specific context. In these cases, participants' more highly activated or more precise representations for natural numbers may underlie and guide their performance. This account suggests that contexts and experiences (including instructional experiences) that help build, strengthen, and activate rational number representations should lead to improvements in performance.     

关于Ramsey数的下界问题

对一般的Ｒａｍｓｅｙ数的下界给出了一个加强结果，并指出用概率方法进一步研究了Ｒｍａｓｅｙ数的下界的关键之处。     

广东省普通高校“扩招”对体育课程建设引发出几个最突出的问题研究

扩招后, 广东省22 所普通本科院校公共体育课程建设引发出了四个最突出的问题。呼吁要加大体育场馆硬件的经费投入, 逐步改变体育教师队伍的学历和职称结构, 充分利用学校体育资源, 合理安排体育授课时段, 尽快适应高等教育超常规的快速发展形势和扩招后所引发的新变化。     

半夏属的染色体数目、倍性与珠芽发生的关系

本文通过对半夏属Pinellia 5个种10个群体的染色体计数和珠芽数量统计，首次报道了5个染色体数目，同时发现珠芽的发生与染色体基数及多倍化程度有关：x=13的类群无珠芽，而x=9的有珠芽；在有珠芽的半夏P．ternata(Thunb．)Breit．中，平均每叶珠芽数随倍性的提高而增大。半夏是一个多倍体复合种，起源于无珠芽、染色体基数为x=7～9的二倍体祖先，可能是在该属的早期进化中由鹞落坪半夏P.yaoluopingensis X．H．Guo et X．L.Liu的x=13经非整倍性跌落而成，在发生上比鹞落坪半夏进化。