基于加速度时域-斜率特征的多向行走识别算法

为了解决行人多向行走模式识别中实时性差和识别精度不高的问题,提出了一种基于加速度时域-斜率特征的多向行走识别算法,通过计算和分析z轴加速度波峰或波谷时刻行人运动方向加速度斜率大小,准确识别行人前进、后退、左移、右移多个方向的行走模式。结果表明,本算法能实时识别行人每一步行走模式,平均识别精度在96%以上。     

A novel high birefringence equal diameter circular-hole photonic crystal fiber

A novel equal diameter circular-hole photonic crystal fiber (PCF) with high birefringence is proposed and numerically analyzed by employing the finite-element method. The proposed PCF’s birefringence is 10-3, which can reach 2 orders higher than that of traditional high birefringence fiber, and this equal diameter circular-hole structure reduces the difficulty of the actual drawing process. The effect of different parameters on the birefringence of this PCF is investigated, and the application of the Sagnac interferometer based on fiber filling technology in temperature sensing is studied. The result shows that the high birefringence PCF can be used in both optical communication and optical sensing fields.