基于5G的电网基建施工装备数字化协同方法

随着中国国家经济的不断发展,电力负荷不断增高,电网基建工程数量也日益增多。针对电网基建工程中存在的施工装备数字化能力弱、协同性差的问题,采用5G网络切片技术划分电力基建施工装备信道,从而实现多类型基建施工装备之间的音视频与数据交互。在此基础上,采用北斗技术和匈牙利算法,建立了电网基建施工装备数字化协同策略,实现基建施工界面下的集中指挥与多位置任务协同工作。通过在某省电力公司变电站和线路现场实例应用,其数字化协同准确性达99.4%。应用结果表明：该方法可提高电网基建施工数字化协同能力,减轻电网基建施工人员工作量。     

基于北斗双重差分的输电线路杆塔位移分析方法

中国西南地区的输电线路地理分布广泛,所处区域地质灾害频发,易造成输电线路杆塔位移,甚至倒塌。为解决输电线路杆塔位移监测难度大、精度低的问题,提出了一种基于北斗双重差分的输电线路杆塔位移分析方法。通过北斗位移监测终端进行输电线路杆塔初始定位;采用地面增强站对输电线路杆塔位移信息进行差分校准,在此基础上,采用双重差分法对输电线路杆塔四个塔基的北斗位移监测终端进行综合位移分析。在某地区进行了模拟试验,位移识别准确率为99.1%,位移识别精度为6.29 mm。其模拟试验结果表明,文中所提方法可准确识别输电线路杆塔位移情况。     

X波段脉冲电子顺磁共振谱仪的矩形腔与微型平面腔的设计

为了满足脉冲式电子顺磁共振谱仪的需要,设计并制作了连续波谐振腔和脉冲谐振腔. 连续波谐振腔采用矩形谐振腔的设计,而脉冲谐振腔采用了微型平面腔的设计. 在设计阶段,使用Ansoft-HFSS三维电磁仿真软件对2种谐振腔进行模拟计算. 微型平面腔的加工采用了微纳加工技术. 制作完成的谐振腔的参数指标由网络分析仪测定. 实验测得2种谐振腔的参数指标符合理论模拟值,并满足脉冲式电子顺磁共振谱仪的要求.     

乳酸左氧氟沙星的紫外光谱性质与应用

在不同pH(1.89-11.58)的Britton-Robinson(B-R)缓冲溶液中,乳酸左氧氟沙星的紫外光谱性质,并对其吸收光谱的移动进行了详细的探讨。提出pH=2.87为分光光度法测定乳酸左氧氟沙星的最佳酸度,在最大吸收波长292nm处,测得其表观摩尔吸光系数为3.4×104L·mol-1·cm-1。乳酸左氧氟沙星的线性范围为1.0-23.0mg·L-1,检出限为0.565mg·L-1。该法成功用于药物制剂中乳酸左氧氟沙星含量的测定,结果满意。     

Micro-Gas Flow Induced Stochastic Resonance of a Nonlinear Nanomechanical Resonator

Fluidics is one of the most historic subjects that are well-established over centuries on the macroscopic scale.In recent years,fluid detection using a number of micro/nano scale devices has been achieved.However,the interaction of microfluid and solid devices on micro/nano-meter scale still lacks in-depth research.We demonstrate a practical nanomechanical detector for microfluidics via a string resonator with high Q-factor,suspended over a hole.This device is placed under a jet nozzle with several microns of diameter,and the interaction between the micro-gas flow and the resonator is observed by monitoring the variation of the fundamental frequency and the quality factor.Moreover,we manage to measure the fluctuations of the micro-gas flow on the nanomechanical resonator by means of stochastic resonance.This work manifests a potential platform for detecting dynamical fluid behaviors at microscopic scale for novel fluid physics.     

Coherent Transfer of Excitation in a Nanomechanical Artificial Lattice

We realize a coherent transfer of mechanical excitation in a finely controlled artificial nanomechanical lattice.We also realize strong dynamic coupling between adjacent high-Q mechanical resonators,via modulated dielectric force at the frequency difference between them.An excitation transfer across a lattice consisting of 7 nanobeams is observed by applying a design sequence of switching for couplings,with the final effective population reaching 0.94.This work not only demonstrates the ability to fully control an artificial lattice but also provides an efficient platform for studying complicated dynamics in one-dimensional systems.     

简易无线能量传送系统

本文设计了一种简单实用的无线传能系统,直流电经振荡电路转化成交流电,利用电磁感应原理,通过线圈电磁耦合,能量以无线的方式传送至负载设备。     

高速磁浮车用高温超导直线电动机的研究综述

高温超导直线电动机采用电流密度高、磁密强的高温超导磁体代替传统直线电动机的铜绕组线圈或永磁体,在相同输出功率等级条件下能够有效减少直线电动机的重量,提高效率与电磁推力,已经成为当前热门的研究趋势.详细论述了国内外高速磁悬浮车用高温超导直线电动机的发展现状,探讨了未来超高速磁悬浮列车用直线电动机的关键技术;最后探讨了高温...     

基于全卷积网络的配电线下鱼塘垂钓识别方法

随着电网建设规模的不断扩大,穿越鱼塘的输配电线路日益增多,为解决输配电线路下垂钓者发生触电风险隐患的问题,文中提出了一种基于全卷积网络的配电线下鱼塘垂钓识别方法。通过安装在输配电线路下方鱼塘旁的摄像头采集鱼塘视频图像,采用全卷积网络图像识别算法对现场的图片进行分析,判断是否有垂钓者及鱼竿物体,当垂钓者携带鱼竿进入鱼塘时,通过扬声器和警示灯进行告警。在某县鱼塘进行验证,其准确率为99.2%,应用结果验证了文中所提方法的有效性。     

Chiral State Conversion in a Levitated Micromechanical Oscillator with In Situ Control of Parameter Loops

Physical systems with gain and loss can be described by a non-Hermitian Hamiltonian, which is degenerated at the exceptional points(EPs).Many new and unexpected features have been explored in the non-Hermitian systems with a great deal of recent interest.One of the most fascinating features is that chiral state conversion appears when one EP is encircled dynamically.Here, we propose an easy-controllable levitated microparticle system that carries a pair of EPs and realize slow evolution of the H...