二维光子晶体绝对带隙的研究

晶体中获得大的绝对带隙,可以通过降低格子对称性解除简并来实现。格子对称性的降低一般可以通过向晶体的原胞内引入不同半径的柱子的方法实现,在该方法基础上结合滑移操作,对二维正方形光子晶体结构进行了研究,发现这种联合方法用于打开绝对带隙特别有用,其相对带隙宽度约为“双柱子正方形格子”情况的2倍,同时还使绝对带隙出现的位置向低频处移动。     

On broken symmetries and classical systems

Baker (2011) argues that broken symmetries pose a number of puzzles for the interpretation of quantum theories—puzzles which he claims do not arise in classical theories. I provide examples of classical cases of symmetry breaking and show that they have precisely the same features that Baker finds puzzling in quantum theories. To the extent that Baker is correct that the classical cases pose no puzzles, the features of the quantum case that Baker highlights should not be puzzling either.     

费米子动力学对称模型SU(3)内禀态下的平均核子数密度及核形变的解析式

给出了费米子动力学对称模型中的SU(3)对称极限的内禀态下的平均核子数密度.建立起传统的几何模型和费米子动力学对称模型的微观联系.并求得核形变的近似解析表达式.     

单粒子四极算符P~2（i）约化矩阵元的计算

用群论方法讨论费米子动力学对称模型（ＦＤＳＭ）中ｋ－集体激发模式情形单粒子四极算符Ｐ~２（ｉ）约化矩阵元的计算．为ｈｅｒｉｔａｇｅ混合的计算作准备。     

晶体中的能带反演对称性

本文从时间反演对称性说明了晶体中布里渊区内能带Ｅ（ｋ）＝Ｅ（－ｋ）的反演对称性，并且证明当晶体具有中心反演对称时，布里渊区内能带是二重简并的。     

李萨如图形研究

定义一个名为特征相差的新的物理量，利用它提出判定李萨如图形异同的准则，并研究李萨如图形的对称性、周期性变化等各种特性。     

PCR技术在遗传病检测中的应用

PCR是近几年发展起来的在分子生物学领域中最重要的技术之一,它在临床检验中的应用极为广泛,并以其高特异性、高灵敏度、简便快速、对样品要求低等优点弥补了其它方法的不足。本文着重介绍该技术的基本原理,及其在遗传病检测中的应用。     

Symmetry and asymmetry in electrodynamics from Rowland to Einstein

Halfway through the paper in which he laid down the foundations for the theory of special relativity, Einstein concludes that “the asymmetry mentioned in the Introduction … disappears.” Making asymmetry disappear has proved to be one of Einstein's many significant moves in his annus mirabilis of 1905. This elimination of asymmetry has led many commentators to claim that Einstein was motivated by either an aesthetic or an epistemic argument which gives priority to symmetry over asymmetry. Following closely the development of electrodynamics in the period from 1880 to 1905 and the usage of the related terms reciprocity and symmetry, we suggest a different way of understanding Einstein's motivation and the path he took. In contrast to the received view, we argue that Einstein responded to a debate in the literature on electrodynamics and that he was concerned neither with an aesthetic nor with an epistemic argument; rather, his reasoning was physical in the best sense, and most original. We will show that by providing a new perspective on the relation between electricity and magnetism, Einstein succeeded in bringing the discussion of symmetry in electrodynamics to an end.     

从二十一世纪力学教程看物理教学体系的变化

分析二十一世纪力学教程的特点，从物理理论的发展和教育目标要求上，讨论大学物理教学体系的变化。