A series of Reed Pulps were prepared in which the level of Non-Process Elements(NPEs), including calcium, manganese,copper,iron were seclectively enriched and depleted, these pulps were then oxygen delignification,and...A series of Reed Pulps were prepared in which the level of Non-Process Elements(NPEs), including calcium, manganese,copper,iron were seclectively enriched and depleted, these pulps were then oxygen delignification,and the pulps were characterized according to kappa number,viscosity,brightness. The results indicated that the enrichment of NPEs have an important effulence on delignification,pulp viscosity and brightness, iron is the most harmful during oxygen delignification but manganese is just like a kind of aid and can enhance brightness and delignification.展开更多
针对市场上的刚性健康监测设备无法贴合皮肤、降低了监测精度以及影响穿戴舒适性等问题,设计了一种基于聚偏氟乙烯(Polyvinylidene Fluoride,PVDF)柔性压电传感器的体征监测系统,以床垫作为载体放置在睡姿胸部正下方,利用高精度传感器...针对市场上的刚性健康监测设备无法贴合皮肤、降低了监测精度以及影响穿戴舒适性等问题,设计了一种基于聚偏氟乙烯(Polyvinylidene Fluoride,PVDF)柔性压电传感器的体征监测系统,以床垫作为载体放置在睡姿胸部正下方,利用高精度传感器及数据处理算法实时监测人体心率和呼吸率。系统以STM32F103为采集通信模块、Purple Pi RK3566为数据处理模块,通过EMD-FFT算法进行实时处理,通过SPI协议实现设备之间的通信。仿真及实测结果表明,该方案抗干扰性好,低频响应好且准确度高,可实现不同场景中体征的实时监测,为提高生活健康质量和生命健康指数提供有效支撑。展开更多
文摘A series of Reed Pulps were prepared in which the level of Non-Process Elements(NPEs), including calcium, manganese,copper,iron were seclectively enriched and depleted, these pulps were then oxygen delignification,and the pulps were characterized according to kappa number,viscosity,brightness. The results indicated that the enrichment of NPEs have an important effulence on delignification,pulp viscosity and brightness, iron is the most harmful during oxygen delignification but manganese is just like a kind of aid and can enhance brightness and delignification.
文摘针对市场上的刚性健康监测设备无法贴合皮肤、降低了监测精度以及影响穿戴舒适性等问题,设计了一种基于聚偏氟乙烯(Polyvinylidene Fluoride,PVDF)柔性压电传感器的体征监测系统,以床垫作为载体放置在睡姿胸部正下方,利用高精度传感器及数据处理算法实时监测人体心率和呼吸率。系统以STM32F103为采集通信模块、Purple Pi RK3566为数据处理模块,通过EMD-FFT算法进行实时处理,通过SPI协议实现设备之间的通信。仿真及实测结果表明,该方案抗干扰性好,低频响应好且准确度高,可实现不同场景中体征的实时监测,为提高生活健康质量和生命健康指数提供有效支撑。
