请你帮我写一个软件工程课程设计管理系统的类图和时序图

好的，我可以为你提供一份软件工程课程设计管理系统的类图和时序图。

1. 类图

下面是软件工程课程设计管理系统的类图：

+-------------+             +-------------------+              +-------------------+              +-----------------+
|   Student   |             |    CourseDesign   |              |    CourseTask     |              |    Teacher      |
+-------------+             +-------------------+              +-------------------+              +-----------------+
| -id: int    |             | -id: int          |              | -id: int          |              | -id: int        |
| -name: str  |             | -name: str        |              | -title: str       |              | -name: str      |
| -email: str |             | -teacher: Teacher |              | -desc: str        |              | -email: str     |
+-------------+             +-------------------+              +-------------------+              +-----------------+
       |                                 |                                |                               |
       |                                 |                                |                               |
+-------------+                        +---------------+           +----------------+            +---------------+
|  Group      |                        |    Document   |           |   Submission   |            |   Reviewer    |
+-------------+                        +---------------+           +----------------+            +---------------+
| -id: int    |                        | -id: int      |           | -id: int       |            | -id: int      |
| -name: str  |                        | -name: str    |           | -student: str  |            | -name: str    |
| -leader: str|                        | -type: str    |           | -task: str     |            | -email: str   |
+-------------+                        | -desc: str    |           | -file: str     |            +---------------+
                                       | -url: str     |           | -submit_time:datetime |
                                       | -create_time:datetime     |           +------------------------+
                                       | -modify_time:datetime     |
                                       +--------------------------+

2. 时序图

下面是软件工程课程设计管理系统的时序图：

Title: Submit Course Design Task

Student->CourseTask: Create a new task
CourseTask->Teacher: Assign teacher
Teacher->Student: Confirm teacher
Student->Group: Create a new group
Group->CourseTask: Register group
CourseTask->Group: Confirm group
Student->Document: Create a new document
Document->Group: Upload document
Group->Document: Verify document
Document->Submission: Generate submission
Submission->Group: Confirm submission

这是一个简单的时序图，描述了学生提交课程设计任务的过程。学生首先创建一个新的任务，然后老师分配任务。学生确认老师后，创建一个新的小组并注册。小组完成注册后，上传文档。小组验证文档后，生成提交并确认。