氮掺杂石墨烯量子点的制备及其在细胞成像中的应用

为克服现有量子点制备技术中存在的荧光量子产率较低及生物相容性差的问题,通过一步水热法合成一种高荧光量子产率的氮掺杂石墨烯量子点(N?GQDs),其荧光量子产率为94％.N?GQDs粒径在20～40 nm之间,最大激发波长为390 nm,发射波长为450 nm.N?GQDs呈现亮蓝色荧光,具有良好的光致发光作用.N?GQ...     

中国散裂中子源快循环同步加速器主准直器的设计与研究

为满足强流加速器对准直器高散热性能、高抗辐射性能、超高真空、高定位精度、高稳定性和在线实时调整等特殊要求,在CSNS/RCS主准直器设计时针对结构方案和控制方案进行了详细设计和研究,针对关键部件:刮束器、真空盒、驱动装置和远程快速拆卸装置等设计难点进行了阐述,在设计中使用ANSYS完成了刮束器的热分析及支架强度和变形校核,用FLUKA程序对辐射屏蔽进行了分析和设计,确保主准直器设计的可靠性。     

基于Modbus协议的三相电力智能配电系统设计

介绍了一种基于Modbus协议的三相电力智能配电系统。系统以16位MSP430处理器为控制核心,采用SAMES SA9904B三相电参量芯片实现三相电力系统的多种电参量的采集和处理,通过标准的Modbus协议可实现对电力设备的实时在线监测、保护、控制和电能计量等。该系统可以单独作为三相电力配电模块使用,也可以方便接入Modbus通信网络,实现了与其他Modbus设备的兼容,可广泛应用于中低压电力配电系统,达到了电力系统配电自动化、信息化和网络化的发展要求。     

遥测数据压缩算法的设计及硬件实现

文中通过分析导弹遥测数据非平稳特性,根据预测差值大小将遥测数据分为缓变参数和速变参数部分,有针对性地采用LZW算法和Huffman算法混合编码的设计方法,并从理论上阐述了该算法的优点及较优的压缩性能.提出了以DSP数据处理器为核心硬件电路的实现方法来进行数据的实时无损压缩,并通过高速以太网传送方式转发给上位机,整个系统模块化设计,易于维护和升级.     

Study on Generation of Glow Discharge Plasma in Air and Surface Modification of Wool Fabric

Plasma Chemistry and Plasma Processing - A lamellar electrode structure is proposed to achieve the generation of a large-area plasma and the effective processing of the wool fabric with the...     

AIR-SARShip-1.0:高分辨率SAR舰船检测数据集

近年来,深度学习技术得到广泛应用,然而在合成孔径雷达(SAR)舰船目标检测研究中,由于数据获取难、样本规模小,尚难以支撑深度网络模型的训练。该文公开了一个面向高分辨率、大尺寸场景的SAR舰船检测数据集,该数据集包含31景高分三号SAR图像,场景类型包含港口、岛礁、不同级别海况的海面等,背景涵盖近岸和远海等多样场景。同时,该文使用经典舰船检测算法和深度学习算法进行了实验,其中基于密集连接端到端网络方法效果最佳,平均精度达到88.1%。通过实验对比分析形成指标基准,方便其他学者在此数据集基础上进一步展开SAR舰船检测相关研究。      

成教实验教学与技能竞赛对接模式的探索

针对成教生生源结构和学习特点,以分析化学实验教学为例,在日常教学中通过强化学生实验操作培训,提高学生分析检测能力。藉举办化学分析工技能竞赛,促进教师教学形式的转变,提升学生自主探究能力。将实验教学与技能竞赛相对接,增强学生就业竞争力,提升学院办学影响力与认可度。     

An All-Thin-Film Electrochromic Device Composed of MoO3--LiBSO--NiOx Multilayer Structure

An all-thin-tilm （ATF） electrochromic device for modulating the optical transmittance is manufactured using magnetron sputtering. The devices consists of MoO3 as the main electrochromic layer, LiBO2 ＋Li2SO4 （LiBSO） as the ion conductor layer, and NiOx as the complementary electrochromic layer. Glass covered with indium tin oxide （ITO） is used as the substrate and the ITO film is used as the bottom electrode. The ITO film deposited on the top of the devices is used as the other electrode. The structure and morphology of the films are characterized by x-ray diffraction （XRD） and scanning electron microscopy （SEM）. The devices exhibit good optical properties with low transmittance values in the coloured state, and the optical modulation is measured by spectrophotometer in the wavelength range from 400 to 800nm. The average visible light transmittance reaches 50.2% and 3.7% in bleached and coloured state, respectively. The results indicate that such a monolithic system has great potential to be applied in smart windows.     

顶空气相色谱法同时测定水中甲醇及苯

顶空气相色谱同时测定水中甲醇及苯含量,方法简单、快速,不需要专门的FFPA色谱柱.甲醇检出限0.01mg/mL,苯检出限0.01μg/mL.     

Novel local smoothness indicators for improving the third‐order WENO scheme

The local smoothness indicators play an important role in the performance of a weighted essentially nonoscillatory (WENO) scheme. Due to having only 2 points available on each substencil, the local smoothness indicators calculated by conventional methods make the third‐order WENO scheme too dissipative. In this paper, we propose a different method to calculate the indicators by using all the 3 points on the global stencil of the third‐order WENO scheme. The numerical results demonstrate that the WENO scheme with the new indicators has less dissipation and better resolution than the conventional third‐order WENO scheme of Jiang and Shu for both smooth and discontinuous solutions.