clc clear % 定义给定的参数和方程 M_B = 104; % B的摩尔质量 D = 1.22; % 反应器管径(m) Tm= 750+273.15; % 加热介质温度(k) Xmax = 0.98; % 出口转化率 FB= 7100 / (M_B*3600*24); % 出口B的摩尔流量(kmol/s) V= 34e-3; T0= 898; % 进入温度(K) p= 1440; % 催化剂堆积密度(kg/m^3) delta_H = 1.39e5; % 反应热(kJ/kmol) M_A = 106; % A的摩尔质量 rho_A = p / M_A; % A的密度(kg/m^3) C_P = 2.177; % 反应物料的热容(kJ/(kg * K)) psk=121 %kPa A=pi*(D/2)^2; FA0=FB/Xmax; xa=0; T=T0; L=0; while xa<0.98; pa=psk*FA0*(1-xa)/(FA0*xa+V); pb=psk*FA0*(xa)/(FA0*xa+V); pc=psk*FA0*(xa)/(FA0*xa+V); k=(2.70e-6)* exp((-10983/T)+9.44); k2=(2.84e-6)*exp((-3676.394/T)-10.525); ra=k2*pb*pc-k*pa; dL=0.001; dxa=-ra*p*A*dL/FA0; xa=xa+dxa; L=L+dL;% 计算床层高度L plot(L,xa); axis([0 5 0 1]); hold on U=140*L^(-0.33)*4.18/60/1000; dT=(delta_H*ra*A*dL-U*pi*D*dL*(T-Tm))/(V+FA0*M_A*xa)/C_P; T=T+dT; plot(L,T); axis([0 5 850 1000]); hold on end disp(L)
时间: 2024-03-31 09:35:52 浏览: 15
这段代码是一个反应器的模拟程序,计算了反应器床层高度和温度随时间的变化情况。程序中使用了一些给定的参数和方程,通过迭代计算来模拟反应器的行为。
具体来说,程序首先定义了一些参数和方程,包括反应物料的摩尔质量、反应器管径、加热介质温度、出口转化率、出口B的摩尔流量、催化剂堆积密度、反应热、反应物料的热容等。然后使用while循环来迭代计算反应器床层高度L和温度T的变化,并在每次迭代中绘制出反应器床层高度和温度随时间的变化曲线。最终输出反应器的床层高度。
需要注意的是,这段代码中有一些参数和方程是根据具体反应器的情况来设定的,如果要将程序用于其他反应器的模拟,需要根据实际情况进行相应的修改。
相关问题
% clc % clear all % a=20e-9; % eps0=8.854e-12; % eps_h=70eps0; % sigma_h=0.1; % eps_i=12eps0; % sigma_i=500;
这段代码是MATLAB代码,主要实现的是对一些变量进行赋值操作。其中:
% clc:清空命令窗口
% clear all:清除所有变量
% a=20e-9:将20乘以10的负9次方赋值给变量a
% eps0=8.854e-12:将8.854乘以10的负12次方赋值给变量eps0
% eps_h=70*eps0:将70乘以eps0的值赋值给变量eps_h
% sigma_h=0.1:将0.1赋值给变量sigma_h
% eps_i=12*eps0:将12乘以eps0的值赋值给变量eps_i
% sigma_i=500:将500赋值给变量sigma_i
如果您需要进一步了解这些变量的含义和用途,可以提出相关问题。
clc clear all %% img_in = imread('ILSVRC2017_test_00000237.jpg'); m = size(img_in,1); n = size(img_in,2); img_lab = rgb2lab(img_in); img_L_mean = mean(mean(img_lab(:,:,1))); img_a_mean = mean(mean(img_lab(:,:,2))); img_b_mean = mean(mean(img_lab(:,:,3))); %% %高斯滤波 img_R = img_in(:,:,1); img_G = img_in(:,:,2); img_B = img_in(:,:,3); w = fspecial('gaussian',[7 7]); img_R_blur = imfilter(img_R,w); img_G_blur = imfilter(img_G,w); img_B_blur = imfilter(img_B,w); img_blur = cat(3,img_R_blur,img_G_blur,img_B_blur); figure('name','滤波') imshow(img_blur) img_lab_blur = rgb2lab(img_blur); %% %计算显著图 Sd = zeros(m,n); for i = 1:m for j = 1:n Sd(i,j) = sqrt((img_L_mean - img_lab_blur(i,j,1))^2 + (img_a_mean - img_lab_blur(i,j,2))^2 + (img_b_mean - img_lab_blur(i,j,3))^2); end end %归一化 Sd_normalized = figure_normalize(Sd); imwrite(Sd_normalized,'FT_saliency.jpg') figure imshow(Sd_normalized) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function Out_image = figure_normalize(In_image) % 归一化至0-1 o_max_image = max(max(In_image)); o_min_image = min(min(In_image)); Out_image = double(In_image - o_min_image)/double(o_max_image - o_min_image); end改进该代码使其能在matlab上运行
clc;
clear all;
img_in = imread('ILSVRC2017_test_00000237.jpg');
m = size(img_in,1);
n = size(img_in,2);
img_lab = rgb2lab(img_in);
img_L_mean = mean(mean(img_lab(:,:,1)));
img_a_mean = mean(mean(img_lab(:,:,2)));
img_b_mean = mean(mean(img_lab(:,:,3)));
%高斯滤波
img_R = img_in(:,:,1);
img_G = img_in(:,:,2);
img_B = img_in(:,:,3);
w = fspecial('gaussian',[7 7]);
img_R_blur = imfilter(img_R,w);
img_G_blur = imfilter(img_G,w);
img_B_blur = imfilter(img_B,w);
img_blur = cat(3,img_R_blur,img_G_blur,img_B_blur);
figure('Name','滤波');
imshow(img_blur);
img_lab_blur = rgb2lab(img_blur);
%计算显著图
Sd = zeros(m,n);
for i = 1:m
for j = 1:n
Sd(i,j) = sqrt((img_L_mean - img_lab_blur(i,j,1))^2 + (img_a_mean - img_lab_blur(i,j,2))^2 + (img_b_mean - img_lab_blur(i,j,3))^2);
end
end
%归一化
Sd_normalized = figure_normalize(Sd);
imwrite(Sd_normalized,'FT_saliency.jpg');
figure;
imshow(Sd_normalized);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function Out_image = figure_normalize(In_image)
o_max_image = max(max(In_image));
o_min_image = min(min(In_image));
Out_image = double(In_image - o_min_image)/double(o_max_image - o_min_image);
end