本文主要针对无线传感器网络W S N的相关研究,利用移动充电器定期为传感器的电池补充能量,从而源源不断地为WSN提供稳定的能量使其正常运转。首先通过建立数学模型,对如何消耗最少的能量以及传感器电池最小容量的问题,给出最优的方案。...本文主要针对无线传感器网络W S N的相关研究,利用移动充电器定期为传感器的电池补充能量,从而源源不断地为WSN提供稳定的能量使其正常运转。首先通过建立数学模型,对如何消耗最少的能量以及传感器电池最小容量的问题,给出最优的方案。其次对消耗最少能量,即最短路径进行了定性与定量分析。利用M A T L A B将给定数据的经纬度按照公式转化为横纵坐标,并且建立各个传感器以及数据中心绘制在二维散点图中,观察其分布地区。最后对转化出的横纵坐标以及散点图进行模拟退火分析,得到移动充电器最优的行走路线,分别求出每个移动充电器所经过的传感器的电池的最低容量。展开更多
We propose a two-dimensional metal grating with rhombus particles on a gold film structure for refractive index sensing due to its perfect absorption at near-infrared wavelength.Via two-dimensional metal grating coupl...We propose a two-dimensional metal grating with rhombus particles on a gold film structure for refractive index sensing due to its perfect absorption at near-infrared wavelength.Via two-dimensional metal grating coupling,the incident light energy is effectively transformed into the surface plasmons which propagate along the upper surface of the gold film and interact with the surrounding environment in a wide range.The plasmonic resonance mechanism of the structure is discussed in detail by theoretical analysis and finite-difference time-domain method.After optimizing the geometrical parameters,the designed structure shows the sensing performance with a refractive index sensitivity of 1006 nm/RIU.More importantly,this plasmonic refractive index sensor achieves an ultra wide refractive index sensing range from 1.0 to 2.4 with a stable sensing performance.The promising simulation results of the structure show that the sensor has a broad application prospect in the field of biology and chemistry.展开更多
文摘本文主要针对无线传感器网络W S N的相关研究,利用移动充电器定期为传感器的电池补充能量,从而源源不断地为WSN提供稳定的能量使其正常运转。首先通过建立数学模型,对如何消耗最少的能量以及传感器电池最小容量的问题,给出最优的方案。其次对消耗最少能量,即最短路径进行了定性与定量分析。利用M A T L A B将给定数据的经纬度按照公式转化为横纵坐标,并且建立各个传感器以及数据中心绘制在二维散点图中,观察其分布地区。最后对转化出的横纵坐标以及散点图进行模拟退火分析,得到移动充电器最优的行走路线,分别求出每个移动充电器所经过的传感器的电池的最低容量。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61865008 and 61505074)the HongLiu First-Class Disciplines Development Program of Lanzhou University of Technology.
文摘We propose a two-dimensional metal grating with rhombus particles on a gold film structure for refractive index sensing due to its perfect absorption at near-infrared wavelength.Via two-dimensional metal grating coupling,the incident light energy is effectively transformed into the surface plasmons which propagate along the upper surface of the gold film and interact with the surrounding environment in a wide range.The plasmonic resonance mechanism of the structure is discussed in detail by theoretical analysis and finite-difference time-domain method.After optimizing the geometrical parameters,the designed structure shows the sensing performance with a refractive index sensitivity of 1006 nm/RIU.More importantly,this plasmonic refractive index sensor achieves an ultra wide refractive index sensing range from 1.0 to 2.4 with a stable sensing performance.The promising simulation results of the structure show that the sensor has a broad application prospect in the field of biology and chemistry.