摘要
[目的]探究隐式三角函数参数与多孔反应载体孔径大小之间的内在关系,实现具有多向梯度孔径的反应载体结构主动设计,进而为应用于传质传热和制氢反应的多孔反应载体的多向梯度孔径设计奠定基础.[方法]在经典隐式三角函数的基础上,解析其中与孔径大小相关的参数,并建立该参数与坐标位置之间的关联,开展梯度孔径反应载体的结构设计;同时通过变参数的方法,分析新型隐式三角函数参数的改变对多孔反应载体孔径梯度的影响;利用多孔反应载体孔径梯度与其对应的隐式三角函数参数训练BP神经网络,建立多孔反应载体孔径梯度与隐式三角函数参数之间的映射关系,进而实现孔径梯度的主动设计.[结果]I-WP型隐式三角函数可获得具有较高比表面积的多孔反应载体.在此基础上,通过建立隐式三角函数参数C与坐标位置之间的关联,实现了多向梯度孔径反应载体的结构设计.基于BP神经网络,实现了多孔反应载体的孔径梯度主动调控,其中,隐式三角函数参数A(用于调控载体的孔径大小及孔径梯度)的预测误差率在2%~14%,参数T(用于辅助调控载体的孔径大小)的预测误差率在0.1%~2%.[结论]隐式三角函数可实现多向梯度孔径反应载体的结构设计,BP神经网络可实现多孔反应载体的孔径梯度主动设计.
[Objective]The relationship between parameters of implicit trigonometric function and the pore-sizes size of porous reaction support is explored,and the active design of the structure of reaction support with multi-directional gradient pore-sizes is accomplished.Consequently,we have laid a design foundation for the study of the influence of the gradient pore-sizes of porous reaction support on the mass and heat transfer capacity and the pore-sizes gradient of porous reaction support with high hydrogen production performance.[Methods]Four classical implicit trigonometric functions are used to build the porous reaction support.The implicit trigonometric function,which can help build the reaction support with high specific surface area,is selected with the multi-directional gradient pore-sizes.Based on the function,its parameters related to the pore-size are analyzed,and the correlation between these parameters and the coordinate position is established to carry out the structural design of the reaction support with gradient pore-sizes.Meanwhile,the influence,related to the change of parameters imbedded in the new implicit trigonometric function,on the pore-sizes gradient of the porous reaction support is analyzed by the method of variable parameters.Furthermore,BP neural network is used to build a mathematical model of the influence of pore-sizes gradient of porous reaction support on the selection of parameters of the implicit trigonometric function.As a result,we can predict these parameters of the implicit trigonometric function required by the porous reaction support with a specific pore-sizes gradient.Then,based on these predicted parameters of implicit trigonometric function,the structure of reaction support with gradient pore-sizes is constructed,and the active design of pore-sizes gradient of the support is attained.[Results]Specific surface areas of porous reaction supports,which are constructed using four classic implicit trigonometric functions,are 18.640,20.185,15.564,and 22.407 mm 2/mm 3,respectively.Due to the I-WP type reaction support with a larger specific surface area,they are selected to achieve the structural design of reaction support with multi-directional gradient pore-sizes.Parameters A and T,which are taken from parameter C,are main regulatory parameters of the pore size gradient of the reaction support.In the study of the influence of pore size gradient of reaction support on parameters of implicit trigonometric function,it is found that,as the pore size gradient of support increases in all directions,the corresponding parameter A of implicit trigonometric function shows an upward trend.In the porous reaction support with pore size gradient in X direction,the increase of the gradient rate of the support induces the increase of parameter T of implicit trigonometric function.Regarding the support with pore size gradient in Y or Z direction,the increase of the gradient rate of the support induces the decrease of parameter T of the function.Then,for the support with pore size gradient in XY or XZ two-directions,the increase of the gradient rate in X direction of the support induces the increase of parameter T of the function.Also,for the support with pore size gradient in XY or XZ two-directions,the increase of the gradient rate in Y or Z direction of the support induces the decrease of parameter T of the function.Finally,regarding the support with pore size gradient in XYZ three-directions,the increase of the gradient rate in X or Y or Z direction of the support induces the decrease of parameter T of the function.[Conclusion]I-WP type implicit trigonometric function can help obtain the reaction support with a larger specific surface area,and it can achieve the structural design of reaction support with multi-directional gradient pore-sizes by building the correlation between its parameter C and the coordinate position.Parameters A and T,which are taken from parameter C,are the main regulatory parameters of the pore size gradient of the reaction support.And parameter A has a significant impact on the pore size gradient.BP neural network can construct a mathematical model of the influence of pore size gradient of reaction support on the selection of the parameters of implicit trigonometric function.In this way,the active design of pore-sizes gradient of porous reaction support can be accomplished.
作者
郑天清
邱泓桑
詹友基
徐继璇
章蒙蒙
王江江
李棒棒
ZHENG Tianqing;QIU Hongsang;ZHAN Youji;XU Jixuan;ZHANG Mengmeng;WANG Jiangjiang;LI Bangbang(Fujian Key Laboratory of Intelligent Machining Technology and Equipment,School of Mechanical&Automotive Engineering Fujian University of Technology,Fuzhou 350118 China)
出处
《厦门大学学报(自然科学版)》
北大核心
2025年第2期327-335,共9页
Journal of Xiamen University:Natural Science
基金
福建省自然科学基金(2024J01825)
福建建省中青年教师教育科研项目(JAT220219)
福建理工大学科研启动金项目(GY-Z220200)
福建省财政厅2023年科技专项资金(GY-Z23274)。
关键词
反应载体
主动设计
梯度孔径
隐式三角函数
神经网络
reaction support
active design
gradient pore-sizes
implicit trigonometric function
neural network
