展区与展品停留行为分析数据展区与展品停留行为分析数据集是自2025年2月开始,通过中国科学院合肥物质科学研究院下属二级机构现代科技馆,利用展馆视频采集设备和建馆时展品设计方案自行采集,进行数据规则算法处理后获得数据集,其数据来源是依法依规获取
展区人流量与人群结构分析数据展区人流量与人群结构分析数据集是自2025年2月开始,通过中国科学院合肥物质科学研究院下属二级机构现代科技馆,利用展馆视频采集设备和建馆时常设展厅规划方案自行采集,进行数据规则算法处理后获得数据集,其数据来源是依法依规获取。
Car Damage Detection (CarDD)CarDD是中国科学院合肥物质科学研究院创建的首个公开大型车辆损伤检测数据集,包含4000张高分辨率车辆损伤图像,涵盖6种损伤类别,共计超过9000个精细标注的实例。数据集通过严格的图像收集、筛选和标注过程构建,旨在支持车辆损伤的分类、检测、分割和显著性检测任务。CarDD的创建不仅推动了车辆损伤评估技术的发展,也为计算机视觉领域的研究提供了新的挑战和机遇,特别是在解决车辆损伤检测和分割中的复杂问题上。
Experimental research on the effect of cesium injection into high power negative ion sourceCesium injection can significantly reduce the surface work function of plasma grid of Radio Frequency negative ion source, which is an effective means to promote the surface generation and improve the yield of H− ions.This study aims to find the impact of the temperature of PG and the cesium injection velocity on the yield of H− ions under cesium injection conditions. [Methods] Based on the experimental platform of high power Radio Frequency negative ion source, this paper takes the mechanism of H− ions surface generation and cesium injection as theoretical basis, and takes the current of H− ions, electron current and the relative strength of cesium characteristic spectral line as numerical basis. Under current experimental conditions, cesium injection has the best effect when temperature of PG is 180~200 ℃, and the H− ions conversion rate reached dynamic equilibrium after about 162 min, when the temperature of cesium injection is 250 ℃/270 ℃. The experimental results show that cesium injection can effectively increase the H− ions yield.
展品热度分析数据展品热度分析数据集是自2025年2月开始,通过中国科学院合肥物质科学研究院下属二级机构现代科技馆,利用展馆视频采集设备和建馆时展品设计方案自行采集,从视频图像中提取围观人数和停留时间的原始数据,从展品设计方案里获取所需展品相关数据信息,进行数据算法处理后获得,其数据来源是依法依规获取。
时间与环境变量对展览参观人流的影响分析数据时间与环境变量对展览参观人流的影响分析数据集是自2025年2月开始,通过中国科学院合肥物质科学研究院下属二级机构现代科技馆利用线上预约、线下闸机日志、展馆视频设备自行采集,从各类设备中获取所需原始数据,进行数据融合和数据加工处理后获得,其数据来源是依法依规获取。
Analysis of neutral beam proton ratio based on multiple linear regressive modelThe levels of neutral beam proton ratio have an important influence on heating the plasma. In the experiment, the macro operation parameters of high current ion source, such as filament voltage, arc voltage and gas flow rate, decide the levels of neutral beam proton ratio. Based on the Experimental Advanced Superconducting Tokamak (EAST) neutral beam injection test bed beam extraction experiments, this paper has used the multiple linear regressive model to analyze extraction neutral beam proton ratio and established the prediction equation which influences neutral beam proton ratio, and tested the correctness of the model. The results show that the neutral beam proton ratio could be analyzed by the multiple linear regressive model whose dependent variables are filament voltage and arc voltage. Among them, the filament voltage is a key parameter to influence proton ratio and then arc voltage.
Study on Cavity Ring-Down Spectroscopy in High Power Ion SourceHigh power ion source is a core component of neutral beam injector for tokamak. Negative ion source is the reference source for ITER neutral beam injection system as negative ion beam has a high neutralization efficiency in high energy. Cavity ring-down spectroscopy (CRDS) is a highly sensitive optical absorption spectroscopic technique. CRDS is able to measure the absolute line-of-sight integrated density of negative hydrogen ions based on photodetachment process. Compared with laser photodetachment method and optical emission spectroscopy, CRDS is insensitive to electromagnetic interference and doesn't need plasma parameters for calculating, thus yielding reliable results. CRDS system is composed of laser, optical cavity, detector and data acquisition system. Equipment selection principle was analyzed. The basic principle of CRDS was presented, and then the analytical form of using CRDS to measure H- density was derived in detail. CRDS has already been applied to high power ion source in laboratories of Germany, Japan and Italy. Results displayed that source parameters, including pressure and power, affected H- density. H- density increased from 1016 m(-3) magnitude to 10(17) m(-3) magnitude in Cs seeded operation. The linearity between H- density and extracted current was proved by NIFS.