谈误差理论中的一些考证

由于真值的不可知性,测量中总存在误差.长期以来误差理论方面的资料偏少,专业计量人员偏少,加之误差分析理论是一个多方面多层次的学科,这就使得各资料说法不一,有些概念比较模糊混乱.本文对误差理论中的一些重要概念及问题作一些考证,以加深对误差理论的理解.     

在大学物理实验教学过程中实施素质教育

从物理实验教学的实际出发,讨论了在大学物理实验教学中实施素质教育的基本途径.     

A new kind of nonlinear phenomenon in coupled fractional-order chaotic systems: coexistence of anti-phase and complete synchronization

In this paper,we have found a kind of interesting nonlinear phenomenon-hybrid synchronization in linearly coupled fractional-order chaotic systems.This new synchronization mechanism,i.e.,part of state variables are anti-phase synchronized and part completely synchronized,can be achieved using a single linear controller with only one drive variable.Based on the stability theory of the fractional-order system,we investigated the possible existence of this new synchronization mechanism.Moreover,a helpful theorem,serving as a determinant for the gain of the controller,is also presented.Solutions of coupled systems are obtained numerically by an improved Adams-Bashforth-Moulton algorithm.To support our theoretical analysis,simulation results are given.