关于惠斯登电桥测电阻中几个问题的讨论

本文简述了电桥原理。提出了电桥平衡和灵敏度计算方面的两个问题，并给出了解决办法。     

滑线式电桥电阻测量条件和灵敏度数据处理的探讨

运用不确定度,推出了滑线式电桥测电阻的最佳测量条件,指出了该条件应用时出现的问题,提出了解决办法：另外对电桥灵敏度测量的等效方法给出了证明,对灵敏度数据处理方法进行了补充。     

基于麦克斯韦方程的矿山岩爆现象研究

基于麦克斯韦方程，本文对岩爆过程中产生的电磁辐射在煤层、岩石中的传播规律进行了理论计算．分析与研究结果显示：一方面，岩爆过程中产生的电磁辐射信号符合麦克斯韦方程；另一方面，数值模拟破裂过程电磁辐射在煤层、岩石中的传播时可将电磁辐射产生源理想化为水平电偶极子和水平磁偶极子的叠加；并得出了电磁辐射源产生的场在煤层、岩石中空间分布的解析计算式．麦克斯韦方程的应用对于岩爆等动力灾害预测的电磁辐射监测仪的研制和定向定位监测具有重要的理论和实际意义．     

Scheme for implementing perfect quantum teleportation with four-qubit entangled states in cavity quantum electrodynamics

Recently, Peng et al. [2010 Eur. Phys. J. D 58 403] proposed to teleport an arbitrary two-qubit state with a family of four-qubit entangled states, which simultaneously include the tensor product of two Bell states, linear cluster state and Dicke-class state. This paper proposes to implement their scheme in cavity quantum electrodynamics and then presents a new family of four-qubit entangled state |Ω₄>₁₂₃₄. It simultaneously includes all the well-known four-qubit entangled states which can be used to teleport an arbitrary two-qubit state. The distinct advantage of the scheme is that it only needs a single setup to prepare the whole family of four-qubit entangled states, which will be very convenient for experimental realization. After discussing the experimental condition in detail, we show the scheme may be feasible based on present technology in cavity quantum electrodynamics.     

Scheme for implementing perfect quantum teleportatior with four-qubit entangled states in cavity quantum electrodynamics

Recently, Peng et al. [2010 Eur. Phys. J. D 58 403] proposed to teleport an arbitrary two-qubit state with a family of four-qubit entangled states, which simultaneously include the tensor product of two Bell states, linear cluster state and Dicke-class state. This paper proposes to implement their scheme in cavity quantum electrodynamics and then presents a new family of four-qubit entangled state ｜Ω/1234. It simultaneously includes all the well-known four-qubit entangled states which can be used to teleport an arbitrary two-qubit state. The distinct advantage of the scheme is that it only needs a single setup to prepare the whole family of four-qubit entangled states, which will be very convenient for experimental realization. After discussing the experimental condition in detail, we show the scheme may be feasible based on present technology in cavity quantum electrodynamics.