报错信息：
在cmd中运行jupyter notebook的时候出现了如下问题：

C:\Users\***>jupyter notebook
Traceback (most recent call last):
  File "D:\Anaconda3\Scripts\jupyter-notebook-script.py", line 6, in <module>
    from notebook.notebookapp import main
  File "D:\Anaconda3\lib\site-packages\notebook\notebookapp.py", line 51, in <module>
    from zmq.eventloop import ioloop
  File "D:\Anaconda3\lib\site-packages\zmq\__init__.py", line 50, in <module>
    from zmq import backend
  File "D:\Anaconda3\lib\site-packages\zmq\backend\__init__.py", line 40, in <module>
    reraise(*exc_info)
  File "D:\Anaconda3\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
    raise value
  File "D:\Anaconda3\lib\site-packages\zmq\backend\__init__.py", line 27, in <module>
    _ns = select_backend(first)
  File "D:\Anaconda3\lib\site-packages\zmq\backend\select.py", line 28, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "D:\Anaconda3\lib\site-packages\zmq\backend\cython\__init__.py", line 6, in <module>
    from . import (constants, error, message, context,
ImportError: DLL load failed while importing error: 找不到指定的模块。

分析问题：
报错是在安装anaconda之后出现的，在Anaconda Promt中是可以运行打开notebook的。那么判断为应该是安装anaconda后，环境变量没有添加完全。

解决方法：
添加完整anaconda环境变量即可：
D:\Anaconda3
D:\Anaconda3\Scripts
D:\Anaconda3\Library\bin

然后重启cmd，运行jupyter notebook可以看到成功。