中文摘要：

精确测量了电路中各个元件的参数，为各种混沌现象的定量分析和数值模拟提供了可能；提出了一种新的测量非线性负阻方法，能精确而快捷地测量非线性负阻完整的I-U曲线；利用这种测量方法的实验电路，可以直接演示电路出现各种混沌现象时非线性负阻对应的工作区段，展示了非线性负阻在蔡氏电路产生混沌过程中所起的决定性作用，有利于学生更好地理解混沌现象产生的机理．

英文摘要：

Parameters of elements in the nonlinear circuit are measured precisely. A novel approach is proposed for a precise and convenient characterization of the nonlinear negative resistor. Based on this improved approach, it is possible to demonstrate simultaneously the chaos states of the circuit and their related I-U working regions of the nonlinear negative resistor, which is very helpful for a better understanding of the origin of nonlinear phenomera in the Chua＇ s circuit.