气相色谱毛细管柱操作参数最优化探索

本文对气相色谱毛细管柱如何选择合适的柱温与载气线速进行了探讨,提出了一种在最短时间内使一种难分离物质达到预期分离的最优化方法,本法数学模型简单.实验工作量小,最优操作参数范围的估计较可靠,改变了凭经验与直觉选择分析件的传统方法,可适用于现代具有微机控制的色谱仪。     

示差脉冲极谱法研究XI. 受前行化学反应控制的电流方程

本文推导了受扩散和前行化学反应控制的示差脉冲极谱电流方程,并用实验进行了验证。根据该方程测得的动力学参数与文献报道值相符合。     

电流反馈示波极谱滴定法

本文提出了电流反馈示波极谱滴定法的原理、仪器装置及操作技术。为了提高去极剂切口的灵敏度, 可将dE/dt信号转换为电流信号后再反馈回电解池以补偿充电电流,一般可将切口灵敏度提高1至5倍, 图形分辨率也较经典方法高, 从而使滴定终点的变化更为敏锐, 扩大了示波极谱滴定的应用范围, 推导了电流反馈的交流电流极化理论公式, 分析了电流反馈对示波极谱图形、去极剂切口灵敏度及切口电位的影响。     

Bifurcation analysis and feedback control of a 3D chaotic system

In this paper, we analyze a three-dimensional differential system derived from the Chen system based on the first Lyapunov coefficient, and apply it to investigate the local bifurcation. And we present some insights on bifurcation and stability, also obtain some conditions for subcritical and supercritical. Finally, we give some numerical simulation studies of system in order to verify analytic results.     

2H－1，2，4－噻二唑并[2,3-α]嘧啶衍生物的合成及除草活性研究（Ⅴ）

合成了10个未见文献报道的目标化合物，结构经IR，^1H NMR,MS和元素分析确 证。初步除草活性测定结果表明：目标化合物具有高效、选择除草活性，主要抑制 双子叶植物（如油菜）的生长,而对单子叶植物（如玉米）具有较好的促进生长作 用。     

Energy deposition and penetration depth of heavy ions in the electronic stopping region

Previous calculations of spatial moments over the distribution of ion ranges and bombardment damage have been extended into the range of ion energies where electronic stopping is important. Numerical solutions are given of well-known integral equations, under the assumption of Thomas-Fermi scattering and velocity-proportional electronic stopping, for equaI masses of ion and target and five values of the electronic stopping constant, over a range of four decades of ion energy. The results are compared with experimental damage distributions, with good success. Implications on sputtering are mentioned briefly.     

平面电极上分支加和循环伏安法的研究

本文用固定电极电容电流理论对分支加和循环伏安法消除电容电流影响的原理作了说明;用数值模拟解法导出了平面电极可逆、准可逆和不可逆过程的理论方程;对其中的可逆过程作了实验验证.理论与实验结果一致.