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import numpy as np
import matplotlib.pyplot as plt
from sklearn import datasets
from sklearn.model_selection import train_test_split     #分割训练集和测试集
from sklearn.neighbors import KNeighborsClassifier       #K近邻

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iris=datasets.load_iris()
iris_X = iris.data
iris_y=iris.target

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iris_X[:2,:]#四个属性两朵花

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iris_y#三类花

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#分割训练集和测试集
X_train,X_test,y_train,y_test=train_test_split(iris_X,iris_y,test_size=0.3)#测试占30%

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y_train#顺便打乱了数据

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knn = KNeighborsClassifier() #使用K近邻分类
knn.fit(X_train,y_train)     #输入测试集

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knn.predict(X_test)#预测

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y_test

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from sklearn import datasets #导入基础数据
from sklearn.linear_model import LinearRegression  #导入模型

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#导入数据
loaded_data = datasets.load_boston()
data_X = loaded_data.data
data_y = loaded_data.target

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#定义模型并训练
model = LinearRegression()#线性模型
model.fit(data_X,data_y)

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#预测
model.predict(data_X[:4,:])

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data_y[:4]

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import numpy as np
from sklearn.tree import DecisionTreeRegressor #回归树
import matplotlib.pyplot as plt

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#生成噪声曲线
rng = np.random.RandomState(1)
rng.rand(2,3)#生成区分行列的二维数据，一维数据不分行列，生成0~1之间的数

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X = np.sort(5*rng.rand(80,1),axis=0)
y = np.sin(X).ravel()#导入二维数据，ravel降维y，可将任意维度降维为一维
plt.scatter(X,y,s=20,edgecolors="black",c="darkorange",label="data")

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y[::5] += 3 * (0.5 - rng.rand(16))#每5个数字加随机+-0.5之间的数当成噪声
plt.scatter(X,y,s=20,edgecolors="black",c="darkorange",label="data")

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#设定参数的模型导入并训练
regr_1 = DecisionTreeRegressor(max_depth=2)
regr_2 = DecisionTreeRegressor(max_depth=5)
regr_1.fit(X,y)
regr_2.fit(X,y)

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X_test = np.arange(0.0,5.0,0.01)[:,np.newaxis]
#取0~5以0.01为步长的有顺序点，后面将1维升维2，跟reshape（-1，1）作用一致

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y_1 = regr_1.predict(X_test)
y_2 = regr_2.predict(X_test)

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plt.figure()
plt.scatter(X,y,s=20,edgecolors="black",c="darkorange",label="data")#边框，点，图例名称
plt.plot(X_test,y_1,color="cornflowerblue",label="max_depth=2",linewidth=2)
plt.plot(X_test,y_2,color="yellowgreen",label="max_depth=5",linewidth=2)
plt.xlabel("data")
plt.ylabel("target")
plt.title("Decision Tree Regression")
plt.legend()#显示图例
plt.show()

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import os
os.sys.executable

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'/usr/bin/python3'

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import os
libs = {
    "requests","jieba","beautifulsoup4","matplotlib","numpy","pandas","openpyxl","tensorflow","仿照格式这里填写要安装的包"
}
try:
    for lib in libs:
        #这里的地址是上一步显示的解释器位置
        os.system('/usr/bin/python3 -m pip install '+lib)
        print("Successful")
except:
    print('error')

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import numpy as np
import pandas as pd


data = pd.read_excel(r'C:\Users\祈LHL\Desktop\data.xlsx')

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data.head()

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y = data.sort_values(by="y-coordinate" , ascending=False)

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step = 4.892/6
i = 0
y_list = []
section = []
#y6  x3

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#分y
while i < 6:
    step_y = float("%.8f"%(i*step))
    a_y = step_y-2.446
    y_min = y.loc[y['y-coordinate'] >= a_y]
    i +=1
    step_y = float("%.8f"%(i*step))
    b_y = step_y-2.446
    y_max = y_min.loc[y_min['y-coordinate'] < b_y]
    y_list.append(y_max)
    section_y = (a_y,b_y)
    section.append(section_y)
#section[5]

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j = 0
step = 1.562/3
x_list = []
section_x_list = []
section_y_list = []

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#在y中分x
while j <= 5:
    temp = y_list[j]
    m = 0
    while m <= 2:
        step_x = float("%.8f"%(m*step))
        a_x = step_x-12.639
        x_min = temp.loc[temp['x-coordinate'] >= a_x]
        m +=1
        step_x = float("%.8f"%(m*step))
        b_x = step_x-12.639
        x_max = x_min.loc[temp['x-coordinate'] < b_x]
        x_list.append(x_max)
        section_x = (a_x,b_x)
        section_x_list.append(section_x)
        section_y_list.append(section[j])
    j += 1
#18个块

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section_list = []
Q_list = []
i = 0

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while i <= 17:
    temp_l = x_list[i]
    Q = (temp_l["density"]*temp_l["z-velocity"]*temp_l["z-face-area"]).sum()
    i +=1
    Q_list.append(Q)

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section_x_list

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[(-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077),
 (-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077),
 (-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077),
 (-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077),
 (-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077),
 (-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077)]

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section_y_list

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[(-2.446, -1.63066667),
 (-2.446, -1.63066667),
 (-2.446, -1.63066667),
 (-1.63066667, -0.8153333300000001),
 (-1.63066667, -0.8153333300000001),
 (-1.63066667, -0.8153333300000001),
 (-0.8153333300000001, 0.0),
 (-0.8153333300000001, 0.0),
 (-0.8153333300000001, 0.0),
 (0.0, 0.8153333299999996),
 (0.0, 0.8153333299999996),
 (0.0, 0.8153333299999996),
 (0.8153333299999996, 1.6306666699999997),
 (0.8153333299999996, 1.6306666699999997),
 (0.8153333299999996, 1.6306666699999997),
 (1.6306666699999997, 2.446),
 (1.6306666699999997, 2.446),
 (1.6306666699999997, 2.446)]

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index = []
i = 0
while i <= 2:
    index.append(section_x_list[i])
    i+=1
index

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[(-12.639, -12.118333329999999),
 (-12.118333329999999, -11.597666669999999),
 (-11.597666669999999, -11.077)]

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cols = []
i = 0
while i <= 17:
    cols.append(section_y_list[i])
    i+=3
cols

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[(-2.446, -1.63066667),
 (-1.63066667, -0.8153333300000001),
 (-0.8153333300000001, 0.0),
 (0.0, 0.8153333299999996),
 (0.8153333299999996, 1.6306666699999997),
 (1.6306666699999997, 2.446)]

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j = 0
data = {}
while j <=5:
    col = cols[j]
    data[col]= 1
    j += 1
data

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{(-2.446, -1.63066667): 1,
 (-1.63066667, -0.8153333300000001): 1,
 (-0.8153333300000001, 0.0): 1,
 (0.0, 0.8153333299999996): 1,
 (0.8153333299999996, 1.6306666699999997): 1,
 (1.6306666699999997, 2.446): 1}

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temp_list = Q_list.copy()
r = 0
l = 0
for i in data:
    content = []
    for j in range(3):
        content.append(Q_list[l])
        l+=1
    data[i] = content
data

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{(-2.446, -1.63066667): [12.427282344087539,
  12.86438295520224,
  8.104732674789329],
 (-1.63066667, -0.8153333300000001): [14.059159859218617,
  14.0170078290342,
  6.50613023081204],
 (-0.8153333300000001, 0.0): [13.851341644545903,
  14.102576555137208,
  6.549793869809068],
 (0.0, 0.8153333299999996): [13.873905539737082,
  14.100577509379482,
  6.539991338980014],
 (0.8153333299999996, 1.6306666699999997): [14.030126072372612,
  13.966730831575635,
  6.467075694188603],
 (1.6306666699999997, 2.446): [11.644887356127308,
  12.004108151505823,
  7.422577844039829]}

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df = pd.DataFrame(data=data, index=index)
df

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%% SIR差分模型
frame=importdata('美国covid19疫情数据l-history改.csv');
date_row=size(frame.data,1);
data=frame.data;
date=frame.textdata(:,1);
real_date=date(2:date_row+1,:);
E=zeros(2,90);
l=0.000125;    %日接触率
m=0.01;   %日治愈率0.0005
E(1,1)=data(345,12)/300000000;
E(2,1)=1-E(1,1);
for i=1:90
    E(1,i+1)=l*E(2,i)-m*E(1,i)+E(1,i);
    E(2,i+1)=E(2,i)-l*E(1,i)*E(2,i);
end
X=flip(data(311:345,12)');% 5.31  4.2
rate=flip(data(311:345,12)')%现阳性率
rate(isnan(rate))=0;
n=length(rate);
rt=0:1:n-1;
%a0=[100,10]; %初值
figure(1)
h1 = plot(rt,X/300000000,'*'); %画点
hold on;
a=E(1,:);
b=E(2,:);
h2 = plot(a,'r')
xlabel('日期');         %设置横坐标名
ylabel('感染人数');   %设置纵坐标名
legend([h1 h2],'3~5月感染人数','SIR模型迭代曲线','Location','NorthWest');
hold on
%%  预测
X=flip(data(255:345,12)');%311行后为第一题
rate=flip(data(255:345,12)')%现阳性率
rate(isnan(rate))=0;
n=length(rate);
rt=0:1:n-1;
figure(2)
h3 = plot(rt,X/300000000,'*'); %画点
hold on;
a=E(1,:);
b=E(2,:);
h4=plot(a,'r')
xlabel('日期');
ylabel('感染人数');
legend([h3 h4],'3~6月感染人数','SIR模型迭代曲线','Location','NorthWest');
hold on
%% 接种疫苗前
frame=importdata('usc.csv');
date_row=size(frame.data,1);
data=frame.data;
date=frame.textdata(:,1);
real_date=date(2:date_row+1,:);
E=zeros(3,150);
l=0.0018;    %日接触率 0.0018
m=0.01;   %日治愈率 0.01
E(1,1)=data(320,1)/300000000;
E(3,1)=28664448/300000000%43714928  33714928  28664448
E(2,1)=1-E(1,1)-E(3,1);

for i=1:150
    E(1,i+1)=E(1,i)+l*E(2,i)-m*E(1,i);
    E(2,i+1)=E(2,i)-l*E(1,i)*E(2,i);
    E(3,i+1)=1-E(1,i+1)- E(2,i+1);
end
X=data(320:486,1)';%80-482  3.1-7.1
rate=data(320:486,1)'%
rate(isnan(rate))=0;
n=length(rate);
rt=0:1:n-1;
figure(6)
h11 = plot(rt,X/300000000,'*'); %画点
hold on;
a=E(1,:);
b=E(2,:);
c=E(3,:);
t=1:151;
h1=plot(t,a,'r')%感染人数
%plot(t,b,'b')%健康人数
plot(t,c,'r')%移除者
%legend('i(t)','s(t)','r(t)')
hold on
%% 接种疫苗后
E=zeros(3,150);
l=0.0018;    %日接触率 0.0018
m=0.01;   %日治愈率 0.01
E(1,1)=data(320,1)/300000000;
E(3,1)=53714928/300000000%43714928  33714928  28664448
E(2,1)=1-E(1,1)-E(3,1);
for i=1:150
    E(1,i+1)=E(1,i)+l*E(2,i)-m*E(1,i);
    E(2,i+1)=E(2,i)-l*E(1,i)*E(2,i);
    E(3,i+1)=1-E(1,i+1)- E(2,i+1);
end
X=data(320:486,1)';%80-482  3.1-7.1
rate=data(320:486,1)'%
rate(isnan(rate))=0;
n=length(rate);
rt=0:1:n-1;
figure(6)
%h11 = plot(rt,X/300000000,'*'); %画点
hold on;
a=E(1,:);
b=E(2,:);
c=E(3,:);
t=1:151;
h2=plot(t,a,'b')%感染人数
%plot(t,b,'b')%健康人数
plot(t,c,'b')%移除者
%legend('i(t)','s(t)','r(t)')
hold on
xlabel('日期');         %设置横坐标名
ylabel('r(t)与i（t）');   %设置纵坐标名
legend([h1 h2 h11],'接种疫苗前','接种疫苗后','感染人数原始数据','Location','NorthWest');

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%改进的指数增长模型
x=flip([324985536 322941312 320635168 318300992 315993728 313830976 311556864 309321664 306771520 304093952 301231200 298379904 295516608 292805312 290107936 287625184 284968960 282162400 279040000 275854016 272656992])
y=flip([0.006330017,0.007192424,0.007333235,0.007301613,0.006891455,0.007299188,0.007226135,0.008312845,0.008805068,0.009503504,0.009555925,0.00968912,0.009259723,0.009297836,0.008631901,0.009321099,0.009946612,0.011189794,0.011549529,0.011725443,0.012112401])
n=length(x);
t=0:1:n-1;
rk=zeros(1,n);
rk(1)=(-3*x(1)+4*x(2)-x(3))/2;
rk(n)=(x(n-2)-4*x(n-1)+3*x(n))/2;
for i=2:n-1
rk(i)=(x(i+1)-x(i-1))/2;
end
rk=rk./x;
p=polyfit(t,rk,2);
r0=p(1);
r1=p(2);
r2=p(3);
x0=x(1);
R=r0*t.^2+r1*t+r2;
X=x0*exp((r0*t.^3)/3+(r1*t.^2)/2+r2*t);
figure(1)
hold on;
xlabel('year');         %设置横坐标名
ylabel('rate');         %设置纵坐标名
grid on                 %网格线
plot(t,y,'r*')
figure(2)
hold on;
xlabel('year');         %设置横坐标名
ylabel('population');   %设置纵坐标名
grid on                 %网格线
plot(t,x,'r*',t,X)
figure(3)
hold on;
xlabel('year');         %设置横坐标名
ylabel('rate');         %设置纵坐标名
grid on                 %网格线
plot(t,y,'r*',t,R')
%2018
t1=t(21)+1;
x2018=x0*exp((r0*t1.^3)/3+(r1*t1.^2)/2+r2*t1)
y2018=r0*t1.^2+r1*t1+r2
%2019
t1=t(21)+2;
x2019=x0*exp((r0*t1.^3)/3+(r1*t1.^2)/2+r2*t1)
y2019=r0*t1.^2+r1*t1+r2

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clc;
clear all;
syms x t;
f(t)=6*(exp(-0.1155*t)-exp(-0.1386*t));
h(t)=exp(-0.1386*t);
figure(1);
fplot(f,[0 25]);
hold on;
fplot(h,[0,25]);
grid on;
xlabel('时间t/h');
ylabel('药量');
legend('血液中的药量y/mg','胃肠道中的药量x/mg');
figure(2)
fplot(f,[0,25]);
hold on;
fplot(h,[0,25]);
f(t)=-(exp(-0.693*t)-exp(-0.1386*t))/4;
fplot(f,[0,25]);
xlabel('时间t/h');
ylabel('药量');
legend('血液中的药量y/mg','胃肠道中的药量x/mg','施救后血液中的药量y/mg');

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clear;
close all;
clc;
pho=[300;862;74.2;1.18];
c=[1377;2100;1726;1005];
lamda=[0.082;0.37;0.045;0.028];
a=lamda./(pho.*c);

d=[0.6;6;3.6;5]*10^-3;

TT=273.15;
T_in=37;
T_out=75;
T_s=48.08;

xmin=0;
xmax=sum(d);

N=5400;
h=0.05*10^-3;
k=1;
r=k/h^2;
I=round((xmax-xmin)/h);

A=zeros(1,I);
B=zeros(1,I+1);
C=zeros(1,I);

N1=round(d(1)/h);
N2=round(d(2)/h);
N3=round(d(3)/h);
N4=round(d(4)/h);

for i=1:N1
    A(i)=-a(1)*r;
    B(i)=2+2*r*a(1);
    C(i)=-r*a(1);
end
for i=N1+1:N1+N2
    A(i)=-a(2)*r;
    B(i)=2+2*r*a(2);
    C(i)=-r*a(2);
end
for i=N1+N2+1:N1+N2+N3
    A(i)=-a(3)*r;
    B(i)=2+2*r*a(3);
    C(i)=-r*a(3);
end
for i=N1+N2+N3+1:N1+N2+N3+N4
    A(i)=-a(4)*r;
    B(i)=2+2*r*a(4);
    C(i)=-r*a(4);
end

T=zeros(I+1,N+1);
T(:,1)=(T_in+TT)*ones(I+1,1);

T_xt=xlsread('CUMCM-2018-Problem-A-Chinese-Appendix.xlsx');

h_min=110;
h_max=120;
delta_h=0.1;
H1=h_min:delta_h:h_max;
delta=zeros(1,length(H1));

for j=1:length(H1)
    h1=h_min+(j-1)*delta_h;
    k1=lamda(1);k2=lamda(2);k3=lamda(3);k4=lamda(4);
    x1=d(1);x2=d(1)+d(2);x3=d(1)+d(2)+d(3);x4=d(1)+d(2)+d(2)+d(4);
    t1=T_out+TT;t2=T_in+TT;t3=T_s+TT;

    h5=-((h1*k2*k3*k4*t1)/(k1*k2*k3*k4-h1*k1*k2*k3*x3-h1*k1*k2*k4*x2 ...
        -h1*k1*k3*k4*x1+h1*k1*k2*k3*x4+h1*k1*k2*k4*x3+h1*k1*k3*k4*x2+h1*k2*k3*k4*x1)-(h1*k2*k3*k4*t3)...
        /(k1*k2*k3*k4-h1*k1*k2*k3*x3-h1*k1*k2*k4*x2-h1*k1*k3*k4*x1+h1*k1*k2*k3*x4+h1*k1*k2*k4*x3+h1*k1*k3*k4*x2+h1*k2*k3*k4*x1))...
        /(t2/k1-t3/k1);

    AA=diag(B)+diag(A,1)+diag(C,-1);
    AA(1,1)=lamda(1)/h+h1;
    AA(1,2)=-lamda(1)/h;
    AA(I+1,I)=-lamda(4)/h;
    AA(I+1,I+1)=lamda(4)/h+h5;

    AA(N1+1,N1)=-lamda(1);
    AA(N1+1,N1+1)=lamda(1)+lamda(2);
    AA(N1+1,N1+2)=-lamda(2);

    AA(N1+N2+1,N1+N2)=-lamda(2);
    AA(N1+N2+1,N1+N2+1)=lamda(2)+lamda(3);
    AA(N1+N2+1,N1+N2+2)=-lamda(3);

    AA(N1+N2+N3+1,N1+N2+N3)=-lamda(3);
    AA(N1+N2+N3+1,N1+N2+N3+1)=lamda(3)+lamda(4);
    AA(N1+N2+N3+1,N1+N2+N3+2)=-lamda(4);

    for n=1:k:N
        D=zeros(I+1,1);
        D(1)=h1*(T_out+TT);
        D(I+1)=h5*(T_in+TT);
        for i=2:1:N1
            D(i)=r*a(1)*T(i-1,n)+(2-2*r*a(1))*T(i,n)+r*a(1)*T(i+1,n);
        end
        for i=N1+1:1:N1+N2
            D(i)=r*a(2)*T(i-1,n)+(2-2*r*a(2))*T(i,n)+r*a(2)*T(i+1,n);
        end
        for i=N1+N2+1:1:N1+N2+N3
            D(i)=r*a(3)*T(i-1,n)+(2-2*r*a(3))*T(i,n)+r*a(3)*T(i+1,n);
        end
        for i=N1+N2+N3+1:1:N1+N2+N3+N4
            D(i)=r*a(4)*T(i-1,n)+(2-2*r*a(4))*T(i,n)+r*a(4)*T(i+1,n);
        end
        D(N1+1)=0;
        D(N1+N2+1)=0;
        D(N1+N2+N3+1)=0;
        T(:,n+1)=AA\D;
    end
   delta(j)=sqrt(sum((T_xt(:,2)-T(end,:)'+TT).^2)/length(T_xt(:,1)));
end
%图二
figure(1);
mesh(0:k:N,1000*(0:h:sum(d)),(T-TT));
%图三
T_problem1=zeros(N+1,4);
T_problem1(:,1)=T(1,:)';
T_problem1(:,2)=T(N1+1,:)';
T_problem1(:,3)=T(N2+N1+1,:)';
T_problem1(:,4)=T(N3+N2+N1+1,:)';
T_problem1=T_problem1-TT;
figure(2);
plot(0:k:N,T_problem1(:,1)',0:k:N,T_problem1(:,2)',0:k:N,T_problem1(:,3)',0:k:N,T_problem1(:,4)',0:k:N,T_xt(:,2)');

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