数e的教育功能

e是一个神奇的数，弄清它的来源和性质，研究它与其它数学对象的内在联系，将使我们认识到，数学对象在联系上的无限广阔性，在内容上的无比深刻性，在变化上的生动哲理性，从而发挥数学对象的多种教育功能。     

一种基于像素标识的笔画细化新方法

利用模板重复对字符点阵数据累加，然后对模板累加数据进行分析，提出标定每一像素点的方法，根据每个像素点的这些标定信息可确定细化后保留点和细化剔除点，进而进行保形的笔画细化。该方法的最大特点就是笔画细化保形效果好，细化结果受笔画边缘毛刺影响很小。通过上机验证，证实该方法是一个在笔画细化上有效实用的方法。     

弧焊逆变电源变结构控制规律的仿真研究

建立了CO2电弧焊的仿真模型，利用MATLAB软件对控制系统的动态过程进行了仿真试验。分析了输出回路中不同的直流电感（线性直流电感、可饱和电感、可变电感）对电源输出电流波形的影响，并获取得CO2短路过渡焊最佳的电流波形。仿真试验表明，只有采用可饱和电感和可变电感才能满足短路过渡过程中各阶段动态性能的要求，以达到减少飞溅的目的。     

字符串表达式的数值计算方法

介绍了如何利用数据结构基本原理构造出一个算法 ,用其计算以字符串形式表示的公式表达式的数值结果     

Carcinogenesis of asbestos switched on by inducing cross-linkage between DNA complementary pair bases

Since the beginning of the 1980s, Dai Qianhuan predicted based upon his di-region theory that the carcinogenesis switched on by the so-called physical carcinogenic factors including radiation, asbestos and foreign matter implantation, is just initiated through the cross-linking between DNA complementary pair bases induced by them. In this note, it was evidenced with the DNA filter elution method that the oxygenase activated by asbestos induces the cross-linking between DNA inter-strands and DNA-protein with dosage correlation, in which over 80% of DNA inter-strand cross-link ratio account for the total cross-link ratio. Obviously, both of the cross-linkages are just induced by hydroxyl free radical, HO ·, because the ferrous ion increased the cross-link ratios up to several times through Fenton reaction and vitamin C inhibited the cross-link ratios with factors of 8–9 by destroying the hydroxyl radical. Non-carcinogen but with lower free radical formation energy, pyrene, by culturing with asbestos gave 3–4 times cross-link ratios than the original ratios induced by asbestos only. Estradiol, an endogenous carcinogen, as a bio-electrophilic species but with higher free radical formation energy by culturing with asbestos, gave only 1.2 time cross-link ratios than expected ones. Ferrous ion which can increase HO · concentration through Fenton reaction, increased the ratios to 2–2.5 times in the former case but only 1.2 time in the latter case. Vitamin C, a free radical scavenger, gave a powerful inhibition to the cross-linking with a factor of 8–11 in the former case but a weak inhibition with a factor of 1.2 only in the latter case. So, it is evidenced further that the cross-linkages induced by asbestos are originated from hydroxyl radical. Reasonable structures of the cross-linking products induced by asbestos or hydroxyl radical have been depicted based upon AMI MO theory. These structures have been verified further by a reasonable explanation of the mutational spectrum induced by hydroxyl radical.     

蓖麻主要农艺性状及单株产量通径分析

利用 2 5个蓖麻杂交种的 14个主要农艺性状与单株产量的资料进行相关分析和通径分析 ,结果表明 ,一级分枝粒重、单株粒数、茎粗是蓖麻增产的重要因素 ,一级分枝粒重是育种目标的关键     

一种新的字符特征提取方法及其在识别中的两个应用

特征抽取是识别中的重要步骤，提取描述性强的特征能够有效提高分类器的识别效率。在提出有关概念的基础上，介绍了特征行抽取在字符过程中的两个重要应用。首先,在分类识别时可用作匹配的特征向量，通过双向匹配来识别独立的字符。其次，可在识别粘连字符时用于预测前端字符，并在提取前端字符后对预测结果进行验证，从而达到准确分割和识别粘连字符的目的。还详细描述了交互确定特征行的方法。最后根据实验数据对字符特征行的应用价值作出了评价。     

基于特征的参数化三维造型技术及其应用

文章介绍了基于特征的参数化三维造型技术的设计思想和实现途径。     

旅游控制论--以"黄金周"旅游系统为例

从控制论角度分析了旅游系统的要素构成、功能结构和区域结构,并以"黄金周"旅游系统为例,剖析了旅游控制系统的特征,旨在揭示旅游系统及其在运行过程中的内在规律.     

培养学生科技素质的语文教学策略

当代中学生必须具备科技素质,语文教学是培养学生科技素质的重要途径。语文教师要树立素质教育的观念,努力提高自身素质;要充分挖掘语文阅读教学中科技教育的内涵;充分发挥作文教学的科技教育功能;寓科技教育于丰富多彩的语文实践活动中;充分利用现代化的教学方法和教学手段培养学生的科技素质。