腔衰荡光谱技术(Cavity Ring Down Spectroscopy,CRDS)具有高精度和高灵敏度,是一种常应用于微量气体浓度检测的方法,而采用这项技术的关键就是衰荡时间的准确获取。本文为此设计一种基于LabVIEW的腔衰荡信号在线处理系统,实现对衰荡信...腔衰荡光谱技术(Cavity Ring Down Spectroscopy,CRDS)具有高精度和高灵敏度,是一种常应用于微量气体浓度检测的方法,而采用这项技术的关键就是衰荡时间的准确获取。本文为此设计一种基于LabVIEW的腔衰荡信号在线处理系统,实现对衰荡信号的实时采集、平均、拟合、显示和保存。采用外部调制二极管激光器和高反腔搭建CRDS装置,获取实际的衰荡信号,用该系统处理测得的衰荡信号与其他软件的处理结果对比。实验表明,所编写的在线腔衰荡信号处理系统,可实现对衰荡时间的准确获取。展开更多
作为推动社会进步与经济发展的重要力量,如何快速且精确地识别潜在颠覆性技术对于提升企业竞争力、推动产业变革等具有关键意义。本文提出一种融合专利数据与社交媒体数据的潜在颠覆性技术早期识别方法,是对已有研究理论和方法的重要补...作为推动社会进步与经济发展的重要力量,如何快速且精确地识别潜在颠覆性技术对于提升企业竞争力、推动产业变革等具有关键意义。本文提出一种融合专利数据与社交媒体数据的潜在颠覆性技术早期识别方法,是对已有研究理论和方法的重要补充。第一,检索相关领域专利数据,对数据进行划分;第二,基于颠覆性技术的特征,选取与颠覆性技术相关的指标以构建指标体系,并计算其技术影响力;第三,依托Bi-LSTM(bi-directional long short-termmemory)训练专利指标与技术影响力之间的关系,预测出候选颠覆性技术,并结合BERTopic提取技术主题;第四,通过BERTopic主题建模基于社交媒体数据提取出社会主题,并通过关注度和情感倾向对社会主题进行评价;第五,通过语义相似度,将社会主题与技术主题匹配映射,以对技术主题进行分类,进而识别出潜在颠覆性技术;第六,以医疗机器人为例,阐述该识别方法的应用过程。研究结果表明,Bi-LSTM模型在准确率、精准率、召回率和F1-score上均超过90%,优于其他模型;将医疗机器人领域中的潜在颠覆性技术划分为高关注度-积极态度、低关注度-积极态度与低关注度-消极态度3种类型;识别出的医疗机器人潜在颠覆性技术,能够为国家发展政策制定与相关产业布局提供参考。展开更多
To meet the communication services with diverse requirements,dynamic resource allocation has shown increasing importance.In this paper,we consider the multi-slot and multi-user resource allocation(MSMU-RA)in a downlin...To meet the communication services with diverse requirements,dynamic resource allocation has shown increasing importance.In this paper,we consider the multi-slot and multi-user resource allocation(MSMU-RA)in a downlink cellular scenario with the aim of maximizing system spectral efficiency while guaranteeing user fairness.We first model the MSMURA problem as a dual-sequence decision-making process,and then solve it by a novel Transformerbased deep reinforcement learning(TDRL)approach.Specifically,the proposed TDRL approach can be achieved based on two aspects:1)To adapt to the dynamic wireless environment,the proximal policy optimization(PPO)algorithm is used to optimize the multi-slot RA strategy.2)To avoid co-channel interference,the Transformer-based PPO algorithm is presented to obtain the optimal multi-user RA scheme by exploring the mapping between user sequence and resource sequence.Experimental results show that:i)the proposed approach outperforms both the traditional and DRL methods in spectral efficiency and user fairness,ii)the proposed algorithm is superior to DRL approaches in terms of convergence speed and generalization performance.展开更多
文摘腔衰荡光谱技术(Cavity Ring Down Spectroscopy,CRDS)具有高精度和高灵敏度,是一种常应用于微量气体浓度检测的方法,而采用这项技术的关键就是衰荡时间的准确获取。本文为此设计一种基于LabVIEW的腔衰荡信号在线处理系统,实现对衰荡信号的实时采集、平均、拟合、显示和保存。采用外部调制二极管激光器和高反腔搭建CRDS装置,获取实际的衰荡信号,用该系统处理测得的衰荡信号与其他软件的处理结果对比。实验表明,所编写的在线腔衰荡信号处理系统,可实现对衰荡时间的准确获取。
文摘作为推动社会进步与经济发展的重要力量,如何快速且精确地识别潜在颠覆性技术对于提升企业竞争力、推动产业变革等具有关键意义。本文提出一种融合专利数据与社交媒体数据的潜在颠覆性技术早期识别方法,是对已有研究理论和方法的重要补充。第一,检索相关领域专利数据,对数据进行划分;第二,基于颠覆性技术的特征,选取与颠覆性技术相关的指标以构建指标体系,并计算其技术影响力;第三,依托Bi-LSTM(bi-directional long short-termmemory)训练专利指标与技术影响力之间的关系,预测出候选颠覆性技术,并结合BERTopic提取技术主题;第四,通过BERTopic主题建模基于社交媒体数据提取出社会主题,并通过关注度和情感倾向对社会主题进行评价;第五,通过语义相似度,将社会主题与技术主题匹配映射,以对技术主题进行分类,进而识别出潜在颠覆性技术;第六,以医疗机器人为例,阐述该识别方法的应用过程。研究结果表明,Bi-LSTM模型在准确率、精准率、召回率和F1-score上均超过90%,优于其他模型;将医疗机器人领域中的潜在颠覆性技术划分为高关注度-积极态度、低关注度-积极态度与低关注度-消极态度3种类型;识别出的医疗机器人潜在颠覆性技术,能够为国家发展政策制定与相关产业布局提供参考。
基金supported by the National Natural Science Foundation of China(No.62071354)the Key Research and Development Program of Shaanxi(No.2022ZDLGY05-08)supported by the ISN State Key Laboratory。
文摘To meet the communication services with diverse requirements,dynamic resource allocation has shown increasing importance.In this paper,we consider the multi-slot and multi-user resource allocation(MSMU-RA)in a downlink cellular scenario with the aim of maximizing system spectral efficiency while guaranteeing user fairness.We first model the MSMURA problem as a dual-sequence decision-making process,and then solve it by a novel Transformerbased deep reinforcement learning(TDRL)approach.Specifically,the proposed TDRL approach can be achieved based on two aspects:1)To adapt to the dynamic wireless environment,the proximal policy optimization(PPO)algorithm is used to optimize the multi-slot RA strategy.2)To avoid co-channel interference,the Transformer-based PPO algorithm is presented to obtain the optimal multi-user RA scheme by exploring the mapping between user sequence and resource sequence.Experimental results show that:i)the proposed approach outperforms both the traditional and DRL methods in spectral efficiency and user fairness,ii)the proposed algorithm is superior to DRL approaches in terms of convergence speed and generalization performance.
