Ramsey数r（3,q）的下界公式

本文证明了两类特殊的循环图是(3,q)-图,从而得到:当q≥4时,r(3,q)≥5*q-13;当q≥7且为奇数时,r(3*q)≥7·q-33.     

混合型表达式及其应用

混合型表达式的定义及其应用     

边界积分方程数值解法及其应用(Ⅱ)

本文推广了中的结果,对于三维问题,利用多元插值和边界型求积公式给出边界积分方程一种新的数值解法。     

简单图的生成树数的进一步探讨

利用Cayley公式求解递推关系方程,给出了一组简单图S（p,n,p）,S（p,n,q）的生成树数的计算公式.     

聚乙烯醇缩丁烯醛初探

对聚乙烯醇缩丁烯醛进行的初步研究表明，聚乙烯醇不难进行缩丁烯醛化．高缩醛度的聚乙烯醇缩丁烯醛较易凝胶化，说明其分子间交联程度较高，可能的原因是作为α，β不饱和醛的丁烯醛与聚乙烯醇进行缩醛化反应时存在着１，２加成与１，４加成两种方式     

具有权因子的Range—Siu公式

在C~?空间中具有逐块光滑强拟凸边界的域上得到具有权因子的 Range-Siu公式和?方程具有同样权因子的解。     

广义微分中值定理及其在求未定式极限中的应用

本文给出了拉哥朗日中值定理和柯西中值定理的广义形式，为求一些复杂的未定式的极提供了一种新的思路和方法。     

Paper tools in experimental cultures

The paper studies various functions of Berzelian formulas in European organic chemistry prior to the mid-nineteenth century from a semiotic, historical and epistemological perspective. I argue that chemists applied Berzelian formulas as productive ‘paper tools’ for creating a chemical order in the ‘jungle’ of organic chemistry. Beginning in the late 1820s, chemists applied chemical formulas to build models of the binary constitution of organic compounds in analogy to inorganic compounds. Based on these formula models, they constructed new classifications of organic substances. They further applied Berzelian formulas in a twofold way to experimentally investigate organic chemical reactions: as tools which supplemented laboratory tools and as tools for constructing interpretive models of organic reactions. The scrutiny of chemists' performances with chemical formulas on paper also reveals a dialectic which contributed considerably to the formation of the new experimental culture of synthetic carbon chemistry that emerged between the late 1820s and the early 1840s. In an unintended and unforeseen way, the tools reacted back on the goals of their users and contributed to conceptual development and a shift of scientific objects and practices (‘substitution’) which transcended the originally intended chemical order.