关于一个热学问题的讨论

不少热学文献都配置了一则典型的习题，然而这些文献对这则习题的解答、给出的答案和提示无一正确，本文首先对该题及其解法提出质疑，然后建立了压缩模型，给出正确的解法并予以讨论。     

无互感耦合的二维N×N复杂二端自感网络的等效自感系数

探讨无互感耦合的二维N×N复杂二端自感网络的等效自感系数计算方法。将电阻网络中的Y△变换、串联、并联引入到自感网络中,并定义一个新的物理量———感导。以此为基础,通过一系列的变换,可使复杂的自感网络化简为简单的自感网络。文章以2×2的自感网络为例计算其等效感导系数的解析解。将此方法推广,便可以求得更为复杂的二维M×N网络的等效感导系数,从而得到等效自感系数。     

国内光度法测定汞的现状

评述了自１９８０年以来，国内光度法测汞（Ⅱ）的情况。内容包括：新高灵敏显色剂、多元络合物、萃取光度法、动力学光度法、荧光光度法、双（三）波长光度法、计算光度法及其它。共引用文献１１４篇。     

Field Method for Integrating the First Order Differential Equation

An important modern method in analytical mechanics for finding the integral, which is called the field-method, is used to research the solution of a differential equation of the first order. First, by introducing an intermediate variable, a more complicated differential equation of the first order can be expressed by two simple differential equations of the first order, then the field-method in analytical mechanics is introduced for solving the two differential equations of the first order. The conclusion shows that the field-method in analytical mechanics can be fully used to find the solutions of a differential equation of the first order, thus a new method for finding the solutions of the first order is provided.     

溶胶—凝胶法制备Al2O3气凝胶

以铝，正丁醇和乙酰乙酸乙酯为原料，采用溶胶－凝胶法和超临界Ｎ２萃取干燥工艺制备轻质，纳米多孔固体Ａｌ２Ｏ３气凝前，并用ＸＲＤ实验手段对气凝胶的结构进行了研究。     

溶胶—凝胶法制备Al_2O_3气凝胶

以铝、正丁醇和乙酰乙酸乙酯（ＥｔＡＣ）为原料,采用溶胶—凝胶法和超临界Ｎ２萃取干燥工艺制备轻质、纳米多孔固体Ａｌ２Ｏ３气凝胶,并用ＸＲＤ实验手段对气凝胶的结构进行了研究