针对接收信号强度指示(Received Signal Strength Indication,RSSI)测距定位算法存在定位结果不稳定且精度低的问题,本文分析了一种基于狄克逊检验法滤波RSSI的高斯牛顿定位(Dixon test filter RSSI Gauss-Newton,DF-RSSI-GN)算法。采...针对接收信号强度指示(Received Signal Strength Indication,RSSI)测距定位算法存在定位结果不稳定且精度低的问题,本文分析了一种基于狄克逊检验法滤波RSSI的高斯牛顿定位(Dixon test filter RSSI Gauss-Newton,DF-RSSI-GN)算法。采用狄克逊(Dixon)检验法滤波剔除观测信号异常值使得观测数据偏度降低,根据偏态程度对观测信号进行高斯均值滤波并通过非线性回归模型拟合RSSI衰减模型参数,在目标点坐标求解阶段利用滤波后的观测信号确定不同方向上的权值进行高斯牛顿(Gauss-Newton)迭代定位。实验结果表明,DF-RSSI-GN算法定位平均精度在1.5 m左右,相比RSSI定位算法和最小二乘定位算法,精度提高1倍以上。展开更多
The careers of three Chinese physicists,Hu Ning,Ma Shijun,and Peng Huanwu at the Dublin Institute for Advance Studies in the 1940s,and later,are described.A brief history of the foundation and operations of the instit...The careers of three Chinese physicists,Hu Ning,Ma Shijun,and Peng Huanwu at the Dublin Institute for Advance Studies in the 1940s,and later,are described.A brief history of the foundation and operations of the institute,as well as the roles in it of Erwin Schrodinger,Walter Heitler,Max Born,and others are included.Some details are given of the works carried out there.The three men's post-institute careers are described,Ma eventually in Australia,and Hu and Peng in the People's Republic of China where they became distinguished leaders of theoretical physics research.展开更多
文摘针对接收信号强度指示(Received Signal Strength Indication,RSSI)测距定位算法存在定位结果不稳定且精度低的问题,本文分析了一种基于狄克逊检验法滤波RSSI的高斯牛顿定位(Dixon test filter RSSI Gauss-Newton,DF-RSSI-GN)算法。采用狄克逊(Dixon)检验法滤波剔除观测信号异常值使得观测数据偏度降低,根据偏态程度对观测信号进行高斯均值滤波并通过非线性回归模型拟合RSSI衰减模型参数,在目标点坐标求解阶段利用滤波后的观测信号确定不同方向上的权值进行高斯牛顿(Gauss-Newton)迭代定位。实验结果表明,DF-RSSI-GN算法定位平均精度在1.5 m左右,相比RSSI定位算法和最小二乘定位算法,精度提高1倍以上。
文摘The careers of three Chinese physicists,Hu Ning,Ma Shijun,and Peng Huanwu at the Dublin Institute for Advance Studies in the 1940s,and later,are described.A brief history of the foundation and operations of the institute,as well as the roles in it of Erwin Schrodinger,Walter Heitler,Max Born,and others are included.Some details are given of the works carried out there.The three men's post-institute careers are described,Ma eventually in Australia,and Hu and Peng in the People's Republic of China where they became distinguished leaders of theoretical physics research.
