A method of measuring turbidity based on a multi-wavelength spectral sensor is proposed by using SFH4737 broad-band infrared LED,a multi-wavelength spectral sensor and independently developed data processing software....A method of measuring turbidity based on a multi-wavelength spectral sensor is proposed by using SFH4737 broad-band infrared LED,a multi-wavelength spectral sensor and independently developed data processing software.Combining multiple wavelength data from the sensor,the unitary and multivariate fitting models were constructed to investigate the relationship among light intensity information,absorbance and turbidity,respectively.The turbidity of the actual water bodies was measured separately by using proposed method and a commercially visible spectrophotometer.The independent-samples T test(p>0.05)showed that there was no significant difference between the method in this paper and the standard assay method.The method is simple and inexpensive,and can be applied to the rapid detection of water turbidity,providing a new way of industrial online measurement.展开更多
晶体学只能够给出有关晶体平均原子结构的信息,而结合逆向蒙特卡罗(Reverse Monte Carlo,RMC)模拟的全散射方法将同时包含原子的平均结构和局部尺度上原子间距、键角以及结构多面体的取向和形变等方面的信息,这也是RMC方法一个独特的优...晶体学只能够给出有关晶体平均原子结构的信息,而结合逆向蒙特卡罗(Reverse Monte Carlo,RMC)模拟的全散射方法将同时包含原子的平均结构和局部尺度上原子间距、键角以及结构多面体的取向和形变等方面的信息,这也是RMC方法一个独特的优势.近年来,借助第三代同步辐射加速器和散裂中子源,RMC方法在实验和理论上都有了较快的发展,同时数据质量高,保证了该方法在材料的局域波动和无序的精细结构研究中的适用性.本文从RMC基本原理和分析方法两个方面介绍了无序体系中的逆向蒙特卡罗方法,同时给出了一系列有助于理解的RMC模型实例.最后,对RMC方法的发展进行了展望.近年来我国对大科学装置的投入迅速增长,相信RMC方法搭载第四代高能量光源,必将在我国新材料的设计与开发中发挥重要的作用.展开更多
基金National Natural Science Foundation of China(No.71801108)Natural Science Fund for Colleges and Universities of Anhui Province(No.KJ2017ZD32)。
文摘A method of measuring turbidity based on a multi-wavelength spectral sensor is proposed by using SFH4737 broad-band infrared LED,a multi-wavelength spectral sensor and independently developed data processing software.Combining multiple wavelength data from the sensor,the unitary and multivariate fitting models were constructed to investigate the relationship among light intensity information,absorbance and turbidity,respectively.The turbidity of the actual water bodies was measured separately by using proposed method and a commercially visible spectrophotometer.The independent-samples T test(p>0.05)showed that there was no significant difference between the method in this paper and the standard assay method.The method is simple and inexpensive,and can be applied to the rapid detection of water turbidity,providing a new way of industrial online measurement.
文摘晶体学只能够给出有关晶体平均原子结构的信息,而结合逆向蒙特卡罗(Reverse Monte Carlo,RMC)模拟的全散射方法将同时包含原子的平均结构和局部尺度上原子间距、键角以及结构多面体的取向和形变等方面的信息,这也是RMC方法一个独特的优势.近年来,借助第三代同步辐射加速器和散裂中子源,RMC方法在实验和理论上都有了较快的发展,同时数据质量高,保证了该方法在材料的局域波动和无序的精细结构研究中的适用性.本文从RMC基本原理和分析方法两个方面介绍了无序体系中的逆向蒙特卡罗方法,同时给出了一系列有助于理解的RMC模型实例.最后,对RMC方法的发展进行了展望.近年来我国对大科学装置的投入迅速增长,相信RMC方法搭载第四代高能量光源,必将在我国新材料的设计与开发中发挥重要的作用.
