Metasurfaces in the long wave infrared(LWIR)spectrum hold great potential for applications in ther-mal imaging,atmospheric remote sensing,and target identification,among others.In this study,we designed and experiment...Metasurfaces in the long wave infrared(LWIR)spectrum hold great potential for applications in ther-mal imaging,atmospheric remote sensing,and target identification,among others.In this study,we designed and experimentally demonstrated a 4 mm size,all-silicon metasurface metalens with large depth of focus opera-tional across a broadband range from 9µm to 11.5µm.The experimental results confirm effective focusing and imaging capabilities of the metalens in LWIR region,thus paving the way for practical LWIR applications of met-alens technology.展开更多
针对当前云网络信息数据挖掘过程存在挖掘存储容量不足,数据挖掘效率低,挖掘成功率较差等不足,提出了一种基于人工智能裁决机制的云网络信息数据挖掘算法。引入人工智能裁决框架机制,统筹兼顾传输带宽、挖掘带宽、节点缓存等影响因素,...针对当前云网络信息数据挖掘过程存在挖掘存储容量不足,数据挖掘效率低,挖掘成功率较差等不足,提出了一种基于人工智能裁决机制的云网络信息数据挖掘算法。引入人工智能裁决框架机制,统筹兼顾传输带宽、挖掘带宽、节点缓存等影响因素,获取数据挖掘强度指数,且通过该指数强化数据挖掘效率,实现了云网络条件下数据的高效并发挖掘。仿真实验表明:与当前广泛使用的超线性数据挖掘算法(Superlinear Data Mining algorithm,SDM算法)、螺旋自适应数据挖掘算法(Spiral Adaptive Data Mining algorithm,SADM算法)相比,文中算法能够显著提高挖掘效率,降低挖掘时延及挖掘错误率,有效改善网络因挖掘因素而导致的时延难题,具有显著的实际部署价值。展开更多
A fiber Bragg grating strain sensor,whose reflection bandwidth is insensitive to temperature,is presented.The cross-sec-tional area is designed to change linearly.Under axial stress,there is a linear relationship betw...A fiber Bragg grating strain sensor,whose reflection bandwidth is insensitive to temperature,is presented.The cross-sec-tional area is designed to change linearly.Under axial stress,there is a linear relationship between stress and average strain.Experimental results show that when temperature increases,reflection center wavelength shifts to longer wavelength,and there is a good linear relationship between center wavelength and temperature.When stress increases,reflection center wavelength shifts to longer wavelength,and reflection bandwidth increases.There are good linear relationships between reflection center wavelength and stress as well as reflection bandwidth and stress.展开更多
基金Supported by National Key R&D Program of China(2021YFA0715500)National Natural Science Foundation of China(NSFC)(12227901)+1 种基金Strategic Priority Research Program(B)of the Chinese Academy of Sciences(XDB0580000)Chinese Academy of Sciences President's In-ternational Fellowship Initiative(2021PT0007).
文摘Metasurfaces in the long wave infrared(LWIR)spectrum hold great potential for applications in ther-mal imaging,atmospheric remote sensing,and target identification,among others.In this study,we designed and experimentally demonstrated a 4 mm size,all-silicon metasurface metalens with large depth of focus opera-tional across a broadband range from 9µm to 11.5µm.The experimental results confirm effective focusing and imaging capabilities of the metalens in LWIR region,thus paving the way for practical LWIR applications of met-alens technology.
文摘针对当前云网络信息数据挖掘过程存在挖掘存储容量不足,数据挖掘效率低,挖掘成功率较差等不足,提出了一种基于人工智能裁决机制的云网络信息数据挖掘算法。引入人工智能裁决框架机制,统筹兼顾传输带宽、挖掘带宽、节点缓存等影响因素,获取数据挖掘强度指数,且通过该指数强化数据挖掘效率,实现了云网络条件下数据的高效并发挖掘。仿真实验表明:与当前广泛使用的超线性数据挖掘算法(Superlinear Data Mining algorithm,SDM算法)、螺旋自适应数据挖掘算法(Spiral Adaptive Data Mining algorithm,SADM算法)相比,文中算法能够显著提高挖掘效率,降低挖掘时延及挖掘错误率,有效改善网络因挖掘因素而导致的时延难题,具有显著的实际部署价值。
基金supported by the National Natural Science Foundation of China(Nos.60837002and61177069)the Ph.D.Programs Foundation of Ministry of Education of China(No.20090009110003)the Fundamental Research Funds for the Central Universities(No.2011YJS214)
文摘A fiber Bragg grating strain sensor,whose reflection bandwidth is insensitive to temperature,is presented.The cross-sec-tional area is designed to change linearly.Under axial stress,there is a linear relationship between stress and average strain.Experimental results show that when temperature increases,reflection center wavelength shifts to longer wavelength,and there is a good linear relationship between center wavelength and temperature.When stress increases,reflection center wavelength shifts to longer wavelength,and reflection bandwidth increases.There are good linear relationships between reflection center wavelength and stress as well as reflection bandwidth and stress.
