New data loading and enhanced usage documents

tutorials/notebook/mindinsight/calculate_and_datagraphic.ipynb

@@ -332,7 +332,7 @@
     "- 启动MindInsigh服务命令：`mindinsigh start --summary-base-dir=/path/ --port=8080`；\n",
     "- 执行完服务命令后，访问给出的地址，查看MindInsigh可视化结果。\n",
     "\n",
-    "![title](https://gitee.com/mindspore/docs/raw/master/tutorials/notebook/mindinsight/images/005.png)"
+    "![title](https://gitee.com/mindspore/docs/raw/master/tutorials/notebook/mindinsight/images/mindinsight_map.png)"
    ]
   },
   {
@@ -346,7 +346,7 @@
     "- 节点信息：显示当前所查看节点的信息，包括名称、类型、属性、输入和输出。便于在训练结束后，核对计算正确性时查看。\n",
     "- 图例：图例中包括命名空间、聚合节点、虚拟节点、算子节点、常量节点，通过不同图形来区分。\n",
     "\n",
-    "![title](https://gitee.com/mindspore/docs/raw/master/tutorials/notebook/mindinsight/images/004.png)"
+    "![title](https://gitee.com/mindspore/docs/raw/master/tutorials/notebook/mindinsight/images/cast_map.png)"
    ]
   },
   {
@@ -397,7 +397,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![title](https://gitee.com/mindspore/docs/raw/master/tutorials/notebook/mindinsight/images/001.png)"
+    "![title](https://gitee.com/mindspore/docs/raw/master/tutorials/notebook/mindinsight/images/data_map.png)"
    ]
   },
   {