利用Flash MX制作不确定度计算课件

以“圆柱体密度测量数据处理”课件的制作为例阐述如何利用FlashMX制作实验数据处理课件。     

Targeting of Kolmogorov-Arnold-Moser Orbits by the Bailout Embedding Method in Two Coupled Standard Maps

A bailout embedding method for controlling chaos can make the chaotic orbits targeting into Kolmogorov- Arnold-Moser orbits. We apply this method to a high-dimensional system with two coupled standard maps. The numerical simulation shows that this method could obtain target islands in order and hence could be used to control chaos. Moreover, it is robust in the presence of weak external noise.     

用驱动参量法实现混沌系统的同步

提出了通过外部混沌信号驱动两个混沌系统的某个参量并导致其同步的方法,以logistic映象和Lorenz系统这两个典型混沌系统为例,数值地研究了这种混沌同步方法.模拟结果表明,当被驱动参量的变化范围足够大时,两个或多个混沌系统在新的动力学的基础上达到完全同步.特别强调指出的是,观察到了两个Lorenz系统依赖于初始条件的不同的同步态 关键词： 混沌 同步 驱动参量法 反向同步     

水体中邻苯二酚和对苯二酚检测方法的研究进展

邻苯二酚和对苯二酚是水体中重要的污染物,对生物体具有严重的危害作用,故实现邻苯二酚与对苯二酚的快速简便、灵敏高效的检测具有十分重要的意义.本文作者综述了近几十年来国内外检测邻苯二酚和对苯二酚的主要方法,如色谱法、分光光度法、化学发光法和电化学分析方法,阐述了各种检测方法的特点;并探讨了两种物质的检测方法的发展趋势.     

Suppression of multiple ion bunches and generation of monoenergetic ion beams in laser foil-plasma

In one-dimensional particle-in-cell simulations, this paper shows that the formation of multiple ion bunches is disadvantageous to the generation of monoenergetic ion beams and can be suppressed by choosing an optimum target thickness in the radiation pressure acceleration mechanism by a circularly polarised laser pulse. As the laser pulse becomes intense, the optimum target thickness obtained by a non-relativistic treatment is no longer adequate. Considering the relativistic Doppler-shifted pressure, it proposes a relativistic formulation to determine the optimum target thickness. The theoretical predictions agree with the simulation results well. The model is also valid for two-dimensional cases. The accelerated ion beams can be compelled to be more stable by choosing the optimum target thickness when they exhibit some unstable behaviours.