[TiO2],t and pH are named as the independent variables and the percentage of decolor(DC%)as the dependent variable.A Box-Behnken design and U12(6×4×3)design with three factors were established to form the tr...[TiO2],t and pH are named as the independent variables and the percentage of decolor(DC%)as the dependent variable.A Box-Behnken design and U12(6×4×3)design with three factors were established to form the training set and the validation set,respectively.And back propagation neural network(BPNN)model is adopted in order to establish the model of photo-catalytic degradation about weak acidic dyes mixture of the GRS big red and weak acid red R.The best result shows that the correlation coefficient(R)is 0.9345 and the mean relative error between the predictive value and experimental value(MRE(%))is 3.23,for training set;the value of R is 0.9257,MRE(%)is 2.75,for the validation set.Besides,we discussed the influences of the pH,[TiO2],and t vs.DC% by the BPNN model.The optimized experimental condition obtained is pH=5.0,[TiO2]=1.50g/L,and t=40min based on the BPNN model,and combination with optimization of nonlinear constraints programming.The experimental value of DC is 99.23%,the predictive value is 98.98%,and the relative error is-0.25% between the predictive value and the experimental value,in the optimized experimental condition.Above all these indicate that the model can not only simulate the system of photo-catalytic degradation commendably but also can obtain the optimal experimental conditions.展开更多
在我国交通共用信息平台建设过程中,如何实现不同部门、不同地域之间的信息共享和信息交换成为面临的主要问题.为了满足ITS建设者在数据管理机制和规范方面的需求,ISO提出了中央数据登记薄(Central Data Registry)标准草案(ISO/DIS 1481...在我国交通共用信息平台建设过程中,如何实现不同部门、不同地域之间的信息共享和信息交换成为面临的主要问题.为了满足ITS建设者在数据管理机制和规范方面的需求,ISO提出了中央数据登记薄(Central Data Registry)标准草案(ISO/DIS 14817),其主要目的是提供一种数据管理机制,以加强各个ITS/TICS部门或应用系统之间共享交通数据的能力.本文分析了我国当前交通共用信息平台建设对中央数据登记簿数据管理机制的需求,概括介绍了ISO中央数据登记簿标准的基本思想和主要内容,介绍了国外在相关系统建设中应用中央数据登记簿数据管理机制的实例,提出了我国在相关领域应当尽快开展的工作.展开更多
文摘[TiO2],t and pH are named as the independent variables and the percentage of decolor(DC%)as the dependent variable.A Box-Behnken design and U12(6×4×3)design with three factors were established to form the training set and the validation set,respectively.And back propagation neural network(BPNN)model is adopted in order to establish the model of photo-catalytic degradation about weak acidic dyes mixture of the GRS big red and weak acid red R.The best result shows that the correlation coefficient(R)is 0.9345 and the mean relative error between the predictive value and experimental value(MRE(%))is 3.23,for training set;the value of R is 0.9257,MRE(%)is 2.75,for the validation set.Besides,we discussed the influences of the pH,[TiO2],and t vs.DC% by the BPNN model.The optimized experimental condition obtained is pH=5.0,[TiO2]=1.50g/L,and t=40min based on the BPNN model,and combination with optimization of nonlinear constraints programming.The experimental value of DC is 99.23%,the predictive value is 98.98%,and the relative error is-0.25% between the predictive value and the experimental value,in the optimized experimental condition.Above all these indicate that the model can not only simulate the system of photo-catalytic degradation commendably but also can obtain the optimal experimental conditions.
文摘在我国交通共用信息平台建设过程中,如何实现不同部门、不同地域之间的信息共享和信息交换成为面临的主要问题.为了满足ITS建设者在数据管理机制和规范方面的需求,ISO提出了中央数据登记薄(Central Data Registry)标准草案(ISO/DIS 14817),其主要目的是提供一种数据管理机制,以加强各个ITS/TICS部门或应用系统之间共享交通数据的能力.本文分析了我国当前交通共用信息平台建设对中央数据登记簿数据管理机制的需求,概括介绍了ISO中央数据登记簿标准的基本思想和主要内容,介绍了国外在相关系统建设中应用中央数据登记簿数据管理机制的实例,提出了我国在相关领域应当尽快开展的工作.
