谈谈正确理解电子电路中有关约束条件的重要性

全面考虑电路的约束条件，对于正确地分析电子电路是非常重要的。本文通过具体的应用实例，强调正确地、全面地理解约束条件在电子电路分析中的重要性。     

可控硅温度控制器仿真实验开发

运用软件技术创建虚拟器材使它们物理性能完全一致,当环境参数相同时仿真实验重复性大大提高;通过实时记录学生实验过程中的各种数据,对学生实验评分更加客观、科学,并可以对学生实验情况进行统计分析;实验中学生操作方便,实验现象表现形象直观,老师检查方便。     

铂电阻温度测量设计性实验研究与开发

研究了铂电阻的温度-阻值之间关系,给出了铂电阻标定温度的曲线,开发了温度测量物理实验题目,丰富了大学物理设计性实验内容,锻炼了学生动手能力和创新性思维。     

光导纤维中光速的实验测定

介绍了光导纤维中光速测定的基本原理。采用调制信号，应用门电路测量了两路输入信号的相差，计算出调制信号在光导纤维中的传输时间，从而得到光速。     

浅谈三人表决器实验电路的设计

采用中小规模集成电路门电路、译码器、数据选择器和加法器分别设计了4种三人表决器实验电路.如果数字系统简单,可以采用门电路;如果数字系统较复杂,则采用译码器、数据选择器和加法器较好.     

试论研究创新型实验的潜科学方法

针对研究创新型实验的思想方法与潜科学的思想方法的相关性,将潜科学方法融人研究创新型实验的工作之中,弥补了以往轻思想方法培养、轻潜能开发、轻素质教育的缺陷,为培养学生的综合实践能力,起到了很好的推动作用。由此也为研究创新型实验的探讨开辟了新的领域。     

试论研究创新型实验的潜科学方法

针对研究创新型实验的思想方法与潜科学的思想方法的相关性,首次将潜科学方法融人研究创新型实验的工作之中,弥补了以往轻思想方法培养,轻潜能开发,轻素质教育的缺陷,为培养学生的综合实践能力,起到了很好的推动作用,由此也为研究创新型实验的探讨开辟了新的领域。     

基于FAHP的研究创新型实验项目选择

将模糊层次分析法(FAHP)应用于项目的选择中来,根据相关因素对项目的重要程度进行排序,改变了靠决策者主观选择项目这一现状,使项目的决择更科学.     

电子学实验平台研制——兼谈加强应用物理专业电子学技术的教学

本文报导了为加强我系学生电子学能力而研制的电子学实验平台，该平台可以提供十多个高等电子这实验，配套设备只需要一台２０ＭＨＺ双线示波器和一台万用表，若有一台函数发生器则更好，教学实践效果良好，达到了少花线，多开实验，开好实验的目的。     

光纤传感器实验研究

本介绍了利用光纤传感器测量位移与振动的实验研究，并提出了扩展实验内容。     

Efficient scheme for realizing a multiplex-controlled phase gate with photonic qubits in circuit quantum electrodynamics

We propose an efficient scheme to implement a multiplex-controlled phase gate with multiple photonic qubits simultaneously controlling one target photonic qubit based on circuit quantum electrodynamics (QED). For convenience, we denote this multiqubit gate as MCP gate. The gate is realized by using a two-level coupler to couple multiple cavities. The coupler here is a superconducting qubit. This scheme is simple because the gate implementation requires only one step of operation. In addition, this scheme is quite general because the two logic states of each photonic qubit can be encoded with a vacuum state and an arbitrary non-vacuum state |φ> (e.g., a Fock state, a superposition of Fock states, a cat state, or a coherent state, etc.) which is orthogonal or quasi-orthogonal to the vacuum state. The scheme has some additional advantages: because only two levels of the coupler are used, i.e., no auxiliary levels are utilized, decoherence from higher energy levels of the coupler is avoided; the gate operation time does not depend on the number of qubits; and the gate is implemented deterministically because no measurement is applied. As an example, we numerically analyze the circuit-QED based experimental feasibility of implementing a three-qubit MCP gate with photonic qubits each encoded via a vacuum state and a cat state. The scheme can be applied to accomplish the same task in a wide range of physical system, which consists of multiple microwave or optical cavities coupled to a two-level coupler such as a natural or artificial atom.     

One-step implementation of a multi-target-qubit controlled phase gate with cat-state qubits in circuit QED

We propose a single-step implementation of a muti-target-qubit controlled phase gate with one catstate qubit (cqubit) simultaneously controlling n–1 target cqubits. The two logic states of a cqubit are represented by two orthogonal cat states of a single cavity mode. In this proposal, the gate is implemented with n microwave cavities coupled to a superconducting transmon qutrit. Because the qutrit remains in the ground state during the gate operation, decoherence caused due to the qutrit’s energy relaxation and dephasing is greatly suppressed. The gate implementation is quite simple because only a single-step operation is needed and neither classical pulse nor measurement is required. Numerical simulations demonstrate that high-fidelity realization of a controlled phase gate with one cqubit simultaneously controlling two target cqubits is feasible with present circuit QED technology. This proposal can be extended to a wide range of physical systems to realize the proposed gate, such as multiple microwave or optical cavities coupled to a natural or artificial three-level atom.     

Power Supply and Programmable Controller for Multishot Pellet Injector

MPI（multishot pellet injector） was imported from Russia about ten years ago. During the year＇s operation in HL-1M, most electrical equipments were repaired. Since the components are non-standard, so it is difficult to maintain. To fueling experiment meet the requirement of in HL-2A. The power supplies of fast valve and a programmable controller for shooting pellets were developed.     

Ultrasonically enhanced chemical dissociation from solid surfaces with application to cleaning electronic circuit boards

The Galvani potential has been used to study the removal of solder flux from electronic circuit boards with and without ultrasound. First a theory of the Galvani potential as applied to decontamination studies is presented. Then theoretical decontamination curves are presented, based on simple chemical kinetics coupled to mass diffusion to and from the surface through a passive boundary layer. Finally, the theory is tested and illustrated by removal of solder flux from finger structures in various solvents including freon, Prelete, and isopropanol in water. Clear differences in how quickly the Galvani potential decreased with time were noted. The fastest results were obtained for 80% isopropanol in water, but it is likely that more metallic salts were left behind on the surface than in the slower methods. The saturation of the solvents is also discussed. Finally, methods of on-line testing solvents and circuit boards based on the Galvani potential are discussed.     

兰州重离子加速器冷却储存环主环二极铁电源设计

主环二极铁电源是兰州重离子加速器冷却储存环(HIRFL-CSR)工程的关键设备和指标要求最高的一台电源,采用了独特的拓扑和控制策略。为满足峰值功率3.15MW(3kA,1.45kV)的输出能力和快脉冲要求,采用了晶闸管整流并联脉宽调制补偿单元的主电路拓扑结构和特殊的控制方式,这套综合方案确保电源满足了全部技术指标。本文介绍了该拓扑结构的原理和优势,讨论了为满足±2×10-4的跟踪误差的要求而采用的控制拓扑和双基准给定的原理,并简介了调试过程和近年来的运行和改进情况。     

门电路传输特性曲线的计算机辅助观测

介绍了利用Mathematica软件包让普通微机通过声卡输出调试信号的方法，并直接用示波器观测了门电路的传输特性曲线。     

电路教学中含受控源电路的分析与探讨

含受控源电路的分析、计算是电路课程教学中的重点和难点.本文从其原则、与独立源的区别和含受控源电路中电源的等效变换,输入电阻的求解,应用回路电流法、结点电压法时的处理方法,应用叠加定理、戴维宁(诺顿)定理时应注意的问题等方面进行了系统分析,以期达到交流、提高之目的.     

50kV/4A输出高压恒流电源

 介绍了适用于脉冲功率技术大容量电容器组快速高效充电的一种变频恒流高压电源,它采用三相半控晶闸管桥式整流,经由两只开关管、储能电感、续流二极管和霍尔电流传感器构成的恒流网络,再由桥式晶闸管电路逆变成1kHz后升压、整流。     

直流电路虚拟实验平台的研究—自组电势差计实验

以“自组电势差计实验”为对象,借助计算机图形学,虚拟现实和计算机仿真等新技术,进行了具有逼真视觉效果与精确实验结果的计算机虚拟实验平台系统的研究与尝试,它可以使学生仿真地在计算机屏幕上完成实验的全部过程,可达到学生在实验前的预习目的。     

50kV/4A输出高压恒流电源

介绍了适用于脉冲功率技术大容量电容器组快速高效充电的一种变频恒流高压电源,它采用三相半控晶闸管桥式整流,经由两只开关管、储能电感、续流二极管和霍尔电流传感器构成的恒流网络,再由桥式晶闸管电路逆变成1kHz后升压、整流。