如何在大学数学教学中渗透数学竞赛思想

讨论了如何结合教学内容在大学数学教学中渗透数学竞赛思想的问题,强调沟通高等数学与初等数学的联系,激发学生学习兴趣。     

基于等维灰色递补方法预测广西人口数量

利用2004～2006年数据采用等维灰色递补动态预测方法对广西2007～2020年人口数量进行了预测.结果显示,到2020年广西人口数量将达到5500万人左右.低增长率高增长量并存是广西今后一段时期人口数量变化的主要特点.     

交叉三角形波纹通道的传热与流动特性的研究

为获得层流条件下交叉三角形波纹通道的传热和流动特性的实验数据,利用热线风速仪和热电偶对流过该设通道的风速和温度进行了测量,在充分考虑入口端流体力学和热力学效应情况下,对周期性通道的实验数据进行处理,并获得平均摩擦因数fD和平均努塞尔数NuD.将实验数据与Fluent数值模拟结果作了对比,误差结果小于±15%.     

APOS理论视角下无穷概念认知分析

无穷概念一直是学生学习的一个困难.APOS理论是一种建构主义的数学学习理论,包含操作、过程、对象和图式4个阶段.内化和凝聚是APOS理论的两个重要的心理机制.教师对无理数的认识要从历史视角下关注数的发展,从发生教学法角度上进行无理数教学设计,让学生从概念发展的过程阶段转化到对象阶段.     

微信公众号的评价指标体系研究

[目的/意义]总结现有的微信公众号现状,研究微信公众号的模式特征,提出微信公众号未来发展的合理建议。[方法/过程]运用文献分析法,分别从系统质量、信息质量、服务质量3个方面构建指标体系,科学评价微信公众号的发展模式。[结果/结论]信息质量是微信公众号发展过程中的核心,一个好的微信公众号其信息质量必定是得到保障的,未来微信公众号的发展可以在保障信息质量的前提下,结合系统以及服务进一步发展。     

期刊h指数与载文数量、被引量关系模型及其变化规律的实证分析

利用《中国引文数据库(CCD)》作为样本统计源,分别对相同时间段不同学科、同一学科不同时间段的期刊h指数与载文量(n)、篇均被引量(p)进行统计与曲线回归,曲线回归结果良好,通过对《中文社会科学引文索引(CSSCI)》统计数据回归,进一步证实曲线方程的存在,并根据回归结果分析统计时间段差别对曲线系数的影响及曲线变化的基本规律。     

Speaker adapted dynamic lexicons containing phonetic deviations of words

Speaker variability is an important source of speech variations which makes continuous speech recognition a difficult task. Adapting automatic speech recognition （ASR） models to the speaker variations is a well-known strategy to cope with the challenge, Almost all such techniques focus on developing adaptation solutions within the acoustic models of the ASR systems. Although variations of the acoustic features constitute an important portion of the inter-speaker variations, they do not cover variations at the phonetic level. Phonetic variations are known to form an important part of variations which are influenced by both micro-segmental and suprasegmental factors. Inter-speaker phonetic variations are influenced by the structure and anatomy of a speaker＇s articulatory system and also his/her speaking style which is driven by many speaker background characteristics such as accent, gender, age, socioeconomic and educational class. The effect of inter-speaker variations in the feature space may cause explicit phone recognition errors. These errors can be compensated later by having appropriate pronunciation variants for the lexicon entries which consider likely phone misclassifications besides pronunciation. In this paper, we introduce speaker adaptive dynamic pronunciation models, which generate different lexicons for various speaker clusters and different ranges of speech rate. The models are hybrids of speaker adapted contextual rules and dynamic generalized decision trees, which take into account word phonological structures, rate of speech, unigram probabilities and stress to generate pronunciation variants of words. Employing the set of speaker adapted dynamic lexicons in a Farsi （Persian） continuous speech recognition task results in word error rate reductions of as much as 10.1% in a speaker-dependent scenario and 7.4% in a speaker-independent scenario.     

关于Fejér平均的正逼近定理

本文改进了Ｆｏｕｒｉｅｒ级数Ｆｅｊéｒ平均的正逼近定理的证明，给出了较文［１］、［２］更为简捷的证明方法。     

语法知识在语言问题思辨中的应用

本文讨论汉语语法知识的实际应用问题。全文包括五个部分：1)统数和序数；2)定数和约数；3)量词和非量词；4)限选和非限选；5)问题小议。     

实数与超实数

本文对实数如何扩充到超实数作了探讨，并证明了超实数的5个重要性质。