摘要：`import numpy as np import matplotlib.pyplot as plt from scipy.integrate import solve_ivp 定义微分方程模型 def model(t, y): f, df_dm, d2f_dm2, T, dT_dm = y d3 阅读全文

摘要：`import numpy as np import matplotlib.pyplot as plt from scipy.integrate import solve_ivp 定义微分方程系统 def system(t, state): x, y = state dxdt = -x - y dy 阅读全文

摘要：`import numpy as np import matplotlib.pyplot as plt a = 1 - 0.2 * (1/12) m = 1.109 * 105 W3 = 17.86 w4 = 22.99 X = [] Z = [] for k in np.arange(0, 0.8 阅读全文

摘要：`def calculate_monthly_payment(P, annual_interest_rate, n_years): monthly_interest_rate = annual_interest_rate / 12 / 100 total_months = n_years * 12 阅读全文