倡导“双轮驱动”,发掘学习潜能

1问题的提出在一次反证法的公开教学中,执教老师依照教材要求,通过对概念的讲解、反证法的操作流程及说明、举例与练习,有序地实施教学,在本节课小结时,向学生提出了这样一个问题:我们为什么要学习反证法?回答出人意料.一位学生说是为了做作     

Study of lower emittance dedicated synchrotron radiation mode for the BEPCⅡ

In this paper,a dedicated synchrotron radiation （SR） mode for the BEPCⅡ with an emittance of 85 nm has been designed,including the linear lattice,chromaticity correction and dynamic aperture optimization.The emittance of the new mode is about 60% of the previous mode used for routine operation of the BEPCⅡ .The effect of wigglers on the linear lattice was compensated and the total dynamic aperture including the wigglers’ nonlinear effect was estimated.The preliminary commissioning at the end of 2008 and the formal operation with the new mode confirmed its merits.     

激光全息无损检测实验

本介绍了利用激光全息干涉计量对物体进行检测技术。并给出了实验装置和对物进行检测的图片。     

A Scheme for Atomic Entangled States and Quantum Gate Operations in Cavity QED

We propose a scheme for controllably entangling the ground states of five-state W-type atoms confined in a cavity and realizing swap gate and phase gate operations. In this scheme the cavity is only virtually excited and the atomic excited states are almost not occupied, so the produced entangled states and quantum logic operations are very robust against the cavity decay and atomic spontaneous emission.     

对实验课教学过程的思考

职业技术教育的特点是以培养学生动手能力为中心,以培养学生技能为目标,因此职业学校必须重视实验教学。通过实践,使学生认识、理解、验证基本概念和定律;训练学生基本操作技术;通过课程设计,生产经营实践,培养学生的职业能力。实验课的教学包括选题与准备、讲授与示范、操作与指导、评议与总结四个阶段。本文就这四个阶段的教学谈谈自己的一点思考心得。     

Multi-agent controlled teleportation of multi-qubit quantum information via two-step protocol

Utilizing both the general quantum teleportation and the two-step protocol, a new method is presented by which multi-qubit quantum information can be teleported in a much easier way from a sender Alice to a receiver Bob via the control of many agents in a network than by Yang et al＇s method. In this method, only all the agents collaborate with Bob can the unknown states in Alice＇s qubits be fully reconstructed in Bob＇s qubits. Comparisons between the method and Yang et al＇s method are made. Results show that, in this method, the preparation difficulty of initial states and the identification difficulty of entangled states are considerably reduced, new method is more feasible in technique, and Hadamard operations are not needed at all.     

中学物理实验操作考试的实践与研究

教育部《关于2000年初中毕业、升学考试改革的指导意见》中明确指出:"切实加强与实验有关内容的考核,有条件的地方可以进行实验操作能力的考核."我们清楚地看到教育行政部门已经把实验操作考试提到了议事日程上,作为物理教育的目标科学地纳入物理实验操作考试中,从而促进物理实验操作考试评估体系的建立,加快素质教育目标在物理学科的落实,逐步形成与素质教育相适应的物理实验操作考试新模式.     

INVESTIGATION ON KANE DYNAMIC EQUATIONS BASED ON SCREW THEORY FOR OPEN-CHAIN MANIPULATORS

IntroductionDynamicsofroboticmanipulatorsisthebasisofdynamiccontrolandmechanicaldesignofroboticmanipulators.Dynamicanalysisofrobotscanemploytheapproachesoftheoreticalmechanicsanddynamicequationsofanalyticalmechanics,suchasNewton_Eulerdynamicequations,Lagrange_Eulerdynamicequations ,Routhequation ,Appellequation ,andKaneequations.Theultimateresultsarethesamewhenweinvestigateononekindofmotionsaboutoneobjectivebydifferentdynamicequations,butthespeedandquantitiesofcomputationoftheseequationsare…     

多粒子W态的多控制隐形传输

利用（N－1）个EPR对和一个（M＋2）量子比特的GHZ态来实现N粒子W态的M个控制隐形传输。当所有的控制方都对自己的粒子进行Hadamard操作和测量，并把测量结果告诉接受方，隐形传输成功实现；接着讨论了当一个控制方不合作，隐形传输失败。     

我校“无线公网的油气田紧急切断防爆阀遥控系统”成果进入产业化

油气田紧急切断防爆阀是油气田鉴于安全生产的需要，在相当多的管线关键位置安装的、处理紧急事故时切断气源的关键装置．目前常用的紧急切断阀为过压或欠压机械式紧急切断阀，这些阀门往往安装在距生产基地较远的野外，存在反映时向慢、不灵敏、功能单一等缺陷，不利于把事故遏止在初发阶段．因此研制一种克服上述缺点的远程控制系统，对于油田安全具有普遍的意义．