数字信号平均实验远程教学系统的研制

为满足远程实验教学的需要，研制了一套基于双客户机／服务器模式和采用TCP／IP的数字信号平均实验远程教学系统。该系统实现了学生通过互联网实时地操作实验室的信号发生器，调节信号幅度旋钮，以及将原始混合信号波形、累加处理后的波形和由摄像机捕获的实验室现场仪器运行情况实时地返回给远程的实验者，从而在异地完成真实的数字信号平均实验过程。     

基于物联网的远程实验操作系统与教学方案——以"示波器的使用"为例

远程教学打破了时间和空间的限制,在现代教学过程中扮演着越来越重要的角色,尤其是在抗击新冠疫情期间,远程在线教学成为了教学的必要手段.针对实验教学需要操作仪器的特殊性,本文以“示波器的使用”为例探索并实践了基于物联网的远程操作物理实验的途径,通过LabVIEW实现对仪器的控制,利用LabVIEW中Web Sever功能实现对仪器的远程操作,让仪器联网,采用Python编程中Tornado框架自主开发网站,为管理和远程操作仪器提供入口,再整合在线会议、电子教室、微信等免费平台与工具,自主搭建了成本低、用途广的远程实验操作系统;设计了包括视频指导、集中上课、自由练习等三部分的教学方案.     

牛顿第二定律实验的改进

牛顿第二定律的验证是大学物理实验中的一个基础性实验．它是一个验证性实验，涉及到检验一个物理定律或规律的基本途径和方法．因此对于其实验精度往往有特殊的要求．本文先简要地分析一下现行高校中牛顿第二定律验证实验的方法，然后对其做了一些改进，改进后的实验精简了实验器材，提高了实验精度．     

CAI试题库系统的开发研究

随着Internet的发展，远程教学已成为一种新型的教学方式，远程测试又是远程教学的一个重要环节。本介绍已开发的CAI试题库的结构及其每部分的功能，并阐述了开发中的几个关键技术问题。     

即兴物理实验

论述了即兴物理实验的优越性，并列举了几个即兴物理实验。     

仿真实验在大学物理实验考核中应用的探讨

介绍大学物理仿真实验的特点, 讨论了我院大学物理实验考核的现状, 探讨了仿真实验在物理实验考 核中应用的思路     

光通信实验设计

提出了一个适合理工科大学物理实验教学的光通信实验系统，介绍了该实验的工作原理，实验装置和调整步骤；该实验以简单的光学元器件组合，演示了现代光通信的基本工作过程。     

气垫导轨实验的拓展

针对传统的气垫导轨实验起点低，过于简单这一缺憾，提出了一种新的实验原理及实验方法，使其内容得以拓展。     

虚拟仿真实验在实验中的应用

介绍了在实验中,恰当地应用EWB软件作虚拟仿真实验,对实验可起到有益的辅助、拓展和加深作用。     

告别忽悠实验迎合理论，彰显实验格物穷理初衷——对大学物理实验教材中光电效应实验线路能否展示遏止电压的追踪研究

本文以较为流行的几种物理实验教材中“光电效应实验线路”为例，探讨了大学物理实验是否“准确表达实验原理”、“实现教育目的”等问题，并指出应“告别忽悠实验迎合理论，彰显实验格物穷理初衷”。     

Ultraviolet laser filaments for remote laser-induced breakdown spectroscopy (LIBS) analysis: applications in cultural heritage monitoring

We report experiments with subpicosecond UV laser filaments for the remote analysis of samples related to objects of cultural heritage. The classic laser-induced breakdown spectroscopy (LIBS) technique finds new avenues through femtosecond filamentation, and dynamic remote LIBS becomes possible. Advantages such as self-regulated laser intensity deposition on the target suggest that there is significant potential for using UV femtosecond filaments for the remote analysis of sculpture and large monuments.     

Remote sample characterization based on fluorescence monitoring

The possibilities and limitations of remote sample characterization using induced fluorescence are discussed. General equations for remote sensing of fluorescence are presented and discussed. The implications of different elements of a system for remote fluorescence sensing on different parameters of the equations are treated. Background light influence and signal processing are considered. Pulsed lasers, flashlamps and cw lamps as excitation sources are compared when matched to the proper detection scheme employing boxcar integration or lock-in detection. Model experiments have been performed to demonstrate different measurement strategies. Examples from remote oil-slick characterization are chosen as illustrations.     

“神舟”四号中的微波遥感

多模态微波遥感器是我国第一次进入太空的微波遥感器 ,是一部集高度计、散射计和辐射计为一体 ,具有综合观测能力的微波遥感器 .经过“神舟”四号飞船的在轨运行实验 ,取得了大量的有效科学数据 ,在轨实验获得成功 .文章介绍了多模态微波遥感器的基本工作原理、系统组成和运行控制模式 ,给出了主要技术和应用指标 ,总结了多模态微波遥感器在轨运行情况 ,给出了初步实验结论     

特征增强SSD算法及其在遥感目标检测中的应用

为了提高对复杂场景下多尺度遥感目标的检测精度,提出了基于多尺度单发射击检测(SSD)的特征增强目标检测算法.首先对SSD的金字塔特征层中的浅层网络设计浅层特征增强模块,以提高浅层网络对小目标物体的特征提取能力;然后设计深层特征融合模块,替换SSD金字塔特征层中的深层网络,提高深层网络的特征提取能力;最后将提取的图像特征与不同纵横比的候选框进行匹配以执行不同尺度遥感图像目标检测与定位.在光学遥感图像数据集上的实验结果表明,该算法能够适应不同背景下的遥感目标检测,有效地提高了复杂场景下的遥感目标的检测精度.此外,在拓展实验中,文中算法对图像中的模糊目标的检测效果也优于SSD.     

Beamline AR‐NW12A: high‐throughput beamline for macromolecular crystallography at the Photon Factory

AR‐NW12A is an in‐vacuum undulator beamline optimized for high‐throughput macromolecular crystallography experiments as one of the five macromolecular crystallography (MX) beamlines at the Photon Factory. This report provides details of the beamline design, covering its optical specifications, hardware set‐up, control software, and the latest developments for MX experiments. The experimental environment presents state‐of‐the‐art instrumentation for high‐throughput projects with a high‐precision goniometer with an adaptable goniometer head, and a UV‐light sample visualization system. Combined with an efficient automounting robot modified from the SSRL SAM system, a remote control system enables fully automated and remote‐access X‐ray diffraction experiments.     

傅里叶变换红外光谱仪遥测污染云团的吸收光谱算法

遥感傅里叶变换红外光谱技术因其具有对污染源作无干扰监测、多组分的同时连续测定、区域性或大范围地区的测量等优点,因而已广泛的应用于遥感测量技术。利用傅里叶变换红外(FTIR)光谱仪远距离探测目标,根据探测的目标源是否充满光谱仪的视场,建立了三种辐射模型。在所建立模型的基础上,选用了D&P公司生产的便携式Model-101型傅里叶变换红外光谱仪,实时探测目标云团和背景,运用差谱法和发射光谱法对探测结果进行了光谱分析,进而得到了扣除背景影响后的目标云团吸收光谱。给出了相应的仿真实验结果示例。实验结果表明,由差谱法得到的结果准确度较好。     

一种远程社区智慧医疗监护平台设计与实现

随着社会节奏的加快与我国老龄化程度的加深,空巢老人数量迅速增加。空巢老人的身体健康成为各社区医疗服务站与其子女尤为关心的首要问题。提出一种远程社区智慧医疗监护平台设计方案,依托互联网大数据,将空巢老人身体健康指标数据通过无线网络远程传送到社区医疗服务站与其子女手机的终端APP。远程社区智慧医疗监护平台由监护端与采集端两大模块组成,能保证24小时不间断守护老人。仿真实验证明,提出的远程社区智慧医疗监护平台设计方案有效可行 。     

Analysis and modeling of radiometric error caused by imaging blur in optical remote sensing systems

Imaging blur changes the digital output values of imaging systems. It leads to radiometric errors when the system is used for measurement. In this paper, we focus on the radiometric error due to imaging blur in remote sensing imaging systems. First, in accordance with the radiometric response calibration of imaging systems, we provide a theoretical analysis on the evaluation standard of radiometric errors caused by imaging blur. Then, we build a radiometric error model for imaging blur based on the natural stochastic fractal characteristics of remote sensing images. Finally, we verify the model by simulations and physical defocus experiments. The simulation results show that the modeling estimation result approaches to the simulation computation. The maximum difference of relative MSE (Mean Squared Error) between simulation computation and modeling estimation can achieve 1.6%. The physical experimental results show that the maximum difference of relative MSE between experimental results and modeling estimation is only 1.29% under experimental conditions. Simulations and experiments demonstrate that the proposed model is correct, which can be used to estimate the radiometric error caused by imaging blur in remote sensing images. This research is of great importance for radiometric measurement system evaluation and application.     

Fiber remote configuration for an optically reconfigurable gate array with four configuration contexts

A function enabling remote programming is necessary for systems used with nuclear power plants, high-energy physics experiments, and other plants with no personnel. Recently, optically reconfigurable gate array (ORGA) architecture has been developed to achieve a huge virtual gate count that is much greater than those of currently available VLSIs. However, ORGA architectures have never supported a remote programming capability since a complicated holographic writer system is required along with an ORGA for that purpose. This paper therefore presents a proposal of a new remotely reconfigurable gate array architecture with four configuration contexts that enable remote reconfiguration using optical fiber networks. Furthermore, this paper presents discussion of the availability of this architecture and plans based on the experimental results.     

重离子加速器实验环内靶控制系统

介绍了国家大科学工程项目——兰州重离子加速器冷却储存环实验环团簇内靶装置的控制系统.该系统基于VAC800,VAC600和TC硬件平台,集成了温度测量与控制、真空与阀门监控及分子泵监控等功能,能够实时实现对温度、真空度的远程监控,满足了内靶实验的需求.在该控制系统的支持下,成功地完成了Me54+离子与氮气靶碰撞实验.该...