写一个aoe网络的关键路径的代码
时间: 2023-12-01 08:13:03 浏览: 47
以下是一个简单的 Python 代码,用于计算 AOE 网络的关键路径:
```python
def calc_critical_path(graph, start_node, end_node):
# 计算每个节点的最早开始时间
earliest_start_time = {node: 0 for node in graph}
for node in graph:
for dep_node in graph[node]:
earliest_start_time[node] = max(earliest_start_time[node], earliest_start_time[dep_node] + graph[node][dep_node])
# 计算每个节点的最晚开始时间
latest_start_time = {node: earliest_start_time[end_node] for node in graph}
nodes = list(graph.keys())
nodes.reverse()
for node in nodes:
for dep_node in graph[node]:
latest_start_time[dep_node] = min(latest_start_time[dep_node], latest_start_time[node] - graph[node][dep_node])
# 计算每个任务的浮动时间
float_time = {node: latest_start_time[node] - earliest_start_time[node] for node in graph}
# 找到关键路径上的任务
critical_path = []
curr_node = start_node
while curr_node != end_node:
critical_path.append(curr_node)
next_node = None
for dep_node in graph[curr_node]:
if float_time[dep_node] == 0 and (not next_node or earliest_start_time[dep_node] < earliest_start_time[next_node]):
next_node = dep_node
curr_node = next_node
critical_path.append(end_node)
return critical_path
```
其中,`graph` 是一个字典,表示 AOE 网络,每个键值对表示一个任务和它的依赖关系,例如:
```python
graph = {
'A': {'B': 3, 'C': 2},
'B': {'D': 4},
'C': {'E': 3},
'D': {'F': 2},
'E': {'F': 2},
'F': {}
}
```
表示 AOE 网络的结构如下:
```
-> B -> D -> F
A -| |- E -> F
-> C --------|
```
`start_node` 和 `end_node` 分别是 AOE 网络的起点和终点。函数的返回值是一个列表,表示 AOE 网络的关键路径。
相关推荐
![doc](https://img-home.csdnimg.cn/images/20210720083327.png)
![application/msword](https://img-home.csdnimg.cn/images/20210720083327.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)