如何在Brightway2中获取Activity Browser桑基图式的技术/生物圈流影响结果

我刚接触Brightway2和Activity Browser，已在Activity Browser中创建一个简单项目并在Python IDE中使用，以理解其运作逻辑。现希望获取活动所用technosphere（技术圈流）/**biosphere（生物圈流）**的单独影响数据，如同Activity Browser桑基图（Sankey Diagramm）所展示的那样。

我的代码如下：

# importing some packages 
from brightway2 import *
import bw2io
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

# current project is defined
projects.set_current("test LCA")
bw2io.bw2setup()

# selecting databases for this project    
test=Database("test")

# see which databases are already loaded
print(databases.list)

# selecting method
EF30 = [method for method in methods if 'EF v3.0' in str(method) and not 'no LT' in str(method)and not 'EN' in str(method)]

# look for activities in database
print(test.search("*"))
# defining the activity in the database
activity = [act for act in test]       


act_df = pd.DataFrame()
act_df['Database Process'] = test
act_df['Amount'] = 1
act_df.reset_index()

# Loop through all activities in the dataframe and all methods (impact categories) defined to calculate the impacts
for index in act_df.index:
    lca = LCA({act_df['Database Process'][index]: act_df['Amount'][index]})
    lca.lci()
    for method in EF30:
        lca.switch_method(method)
        lca.lcia()
       
        impact_cat = str(method[1])
        impact_unit = str(methods[method]['unit'])
        header = impact_cat,'({})'.format(impact_unit)
        act_df.loc[index, " ".join(header)] = lca.score
        
act_df_transposed=act_df.transpose()

# write data in Excel
act_df_transposed.to_excel("test.xlsx")


print('DONE!')

我已查看technosphere和biosphere矩阵，但无法理解其含义。

内容的提问来源于stack exchange，提问作者squareK