Realization of the Fredkin Gate by Three transition Pulses in a Nuclear Magnetic Resonance Quantum Information Processor

We have experimentally realized the Fredkin gate with only three transition pulses in a solution of alanine.It appears that no experimental realization of the Fredkin gate with fewer pulses has been reported yet.In addition,the simple structure of our scheme makes it easy to implement in experiments.     

单片机实现自控机器人小车

本题是中国科技大学机器人对抗赛的一个参赛作品,本次对抗赛的主题是机器人投捡球对抗赛,具体要求如下: 1.机器人原始尺寸不得超过30cm×30cm×30cm,进入场地后展开尺寸不得超过40cm×40cm×40cm,且机器人只能是一个,总重量不得超过10kg。比赛中人不得参与控制(包括不得采用声控、无线电遥控等)。2.场地设施:一块3m×3m的正方形场地,用2cm的白线沿长和宽方向分别将场地6等分。场地的四周用挡板围起,挡板高10cm,在场地的中心固定一个高8cm、外径为30cm的透明圆筒,壁厚不大于1cm,圆筒中心位置固定一个60W的白炽灯泡(加保护罩),圆桶内底面为木质地板,比赛场地面用人造革地板。3.比赛时间为3分钟。4.每场比赛由两队参加,机器人始发点为既定启动区,待裁判宣布开始后,机器人方可启动。比赛过程中只允许重启一次。5.比赛前由裁判随机地将五个白色乒乓球从小桶中倒在场地中,另外20个黄色乒乓球分别放在场地中既定的白线交点处。比赛中机器人吞入乒乓球(不分颜色)每个得1点,机器人将乒乓球放入场地中间的圆筒内,投入黄     

一种基于环境推理的空调控制器

介绍1种基于环境推理采用PIC16C74单片机实现的空调控制器，通过记录和推理得到不同环境参数而采取相应控制策略，使采用该控制器的空调在舒适、节能以设备使用寿命方面都有很大提高。     

改革模拟实验教学和考试方法的尝试

模拟电子线路实验课对于电子线路教学改革和提高学生的工程实践能力具有重要作用。本文阐述了模拟实验课单独设课后教学及考试方法的改革尝试以及教学体会和教学效果。     

用MoM—PCG—FFT分析金属栅有限阵列的散射问题

本文用矩量法、预条件共轭梯度法和快速傅里叶变换（MoM-PCG-FFT)的混合技术来分析金属栅有限阵列的电磁散射问题。首先以等效电流作为未知函数建立积分方程组或积分－微分方程组,再用矩量法（脉冲／点匹配）获得一个线性代数方程组,其系数矩阵是一个对称二重复Toeplitz矩阵,基于这一特点,应用预条件共轭梯度法和快速傅里叶变换的结合算法（PCGFFT）来求解这个线性代数方程组,其中预条件器选用T.Chan循环预条件共轭梯度法和快速傅里叶变换的结合算法（PCGFFT）来求解这个线性代数方程组,其中预条件器选用T．Chan循环预条件器的二重分块形式。文中给出的数值算例表明该混合技术是有效的,适用于较大的金属栅有限阵列的分析。     

强化自动控制系统课程实践环节的搜索

介绍了利用科研项目和科研成果，将最新技术与成果向实践性环节转化，开设高水平系列化的综合型，设计型实验的一些做法，并总结了科研成果向实践性环节转化过程中的一些社会。     

基于FPGA的SOPC设计实践教学方法探索

基于FPGA的SOPC设计技术是现代电子系统设计人员的必备技能之一,并逐步成为嵌入式系统技术发展的新方向.本文针对电子科学与技术专业的教学实践,分别从SOPC嵌入式系统领域人才需求,知识体系进行分析.在此基础上,对课程内容,实验平台选择,实践环节设计和考核方式等进行了详细的说明,提出了一种基于Altera FPGA开发板DE2-70的SOPC设计教学实践体系.并以用户定制IP核实验为例,详细分析了该实践教学体系的教学效果.     

Effect of Substrates on CuInSe2 Nanoparticle Thin Films by Radio Frequency Reactive Sputtering

CuInSe2(CIS) nanoparticle thin films have been prepared by radio frequency reactive magnetron sputtering from compound ternary fan-shaped targets on low-temperature substrates with pure argon gas as the atmosphere.The stoichiometry of the ternary compound semiconductor quantum dots can easily be controlled by the ratios of the ternary elements and sputtering parameters.CIS nanoparticle thin films regularly shaped and distributed reasonably uniform in size on substrates of 7059 glass etc can be grown in this way.The average particle diameter can be varied between 40-80 nm by an appropriate choice of the substrate temperature,power density and total CIS coverage.the optical and electrical properties of the CIS films have also been studied.     

A Calculation Approach to Elastic Constants of Crystallines at High Pressure and Finite Temperature

Elastic constants of Na and Li metals are calculated successfully for temperatures up to 350K and pressures up to 30GPa using a scheme without involving any adjustable parameter.Elastic constants are assumed to depend only on an effective pair potential that is only determined by the average interatomic distance.Temperature has an effect on elastic constants by way of charging the equilibrium.The elastic constants can be obtained by fitting the relationship between total energy and strain tensor using the new set of lattice parameters obtained by calculating displacement of atoms at the finite temperature and at a fixed pressure.The relationship between the effective pair potential and the interatiomic distance is fitted by using a series of data of cohesive energy corresponding to lattice parameters.     

Novel Chiral Aminophosphine Ligand:Synthesis and Application in Saymmetric Catalytic Hydrogenation Reaction

A new chiral aminophosphine ligand 6,6′-dimethoxy-2,2′-bis(diphenylphosphinoamino)biphenyl(DMBDPPABP) was prepared and its rhodium complex was found to be an effective catalyst for the asymmetric hydrogenation of amidoacrylic acid and its dervatives.The effects of solvent and reaction temperature on enantioselectivity were also studied.