Add loading_dataset.ipynb,modify nlp_application.ipynb and README.mb about them

tutorials/notebook/README.md

@@ -54,4 +54,6 @@
 | [debugging_in_pynative_mode.ipynb](./debugging_in_pynative_mode.ipynb)                               | - GPU平台下从数据集获取单个数据进行单个step训练的数据变化全过程解读 <br/> - 了解PyNative模式下的调试方法 <br/> - 图片数据在训练过程中的变化情况的图形展示 <br/> - 了解构建权重梯度计算函数的方法 <br/> - 展示1个step过程中权重的变化及数据展示
 | [mindinsight_model_lineage_and_data_lineage.ipynb](./mindinsight/debugging_in_pynative_mode.ipynb)                               | - 了解MindSpore中训练数据的采集及展示 <br/> - 学习使用SummaryRecord记录数据 <br/> - 学习使用回调函数SummaryCollector进行数据采集 <br/> - 使用MindInsight进行数据可视化 <br/> - 了解数据溯源和模型溯源的使用方法
 | [calculate_and_datagraphic.ipynb](https://gitee.com/mindspore/docs/blob/master/tutorials/notebook/mindinsight/calculate_and_datagraphic.ipynb)                               | - 了解MindSpore中新增可视化功能 <br/> - 学习使用MindInsight可视化看板<br/> - 学习使用查看计算图可视化图的信息的方法<br/> - 学习使用查看数据图中展示的信息的方法 
-| [data_loading_enhancement.ipynb](https://gitee.com/mindspore/docs/blob/master/tutorials/notebook/data_loading_enhance/data_loading_enhancement.ipynb)                               | - 学习MindSpore中数据处理和增强的方法 <br/> - 展示数据处理、增强方法的实际操作 <br/> - 对比展示数据处理前和处理后的效果<br/> - 表述在数据处理、增强后的意义
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+| [data_loading_enhancement.ipynb](https://gitee.com/mindspore/docs/blob/master/tutorials/notebook/data_loading_enhance/data_loading_enhancement.ipynb)                               | - 学习MindSpore中数据处理和增强的方法 <br/> - 展示数据处理、增强方法的实际操作 <br/> - 对比展示数据处理前和处理后的效果<br/> - 表述在数据处理、增强后的意义
+| [loading_dataset.ipynb](https://gitee.com/mindspore/docs/blob/master/tutorials/notebook/loading_dataset.ipynb) | - 学习MindSpore中加载数据集的方法 <br/> - 展示加载常用数据集的方法<br/> - 展示加载MindRecord格式数据集的方法<br/> - 展示加载自定义格式数据集的方法 
+| [nlp_application.ipynb](https://gitee.com/mindspore/docs/blob/master/tutorials/notebook/nlp_application.ipynb) | - 展示MindSpore在自然语言处理的应用<br/> - 展示自然语言处理中数据集特定的预处理方法<br/> - 展示如何定义基于LSTM的SentimentNet网络 

tutorials/notebook/nlp_application.ipynb

@@ -68,7 +68,7 @@
     "| \"Quitting\" may be as much about exiting a pre-ordained identity as about drug withdrawal. As a rural guy coming to Beijing, class and success must have struck this young artist face on as an appeal to separate from his roots and far surpass his peasant parents' acting success. Troubles arise, however, when the new man is too new, when it demands too big a departure from family, history, nature, and personal identity. The ensuing splits, and confusion between the imaginary and the real and the dissonance between the ordinary and the heroic are the stuff of a gut check on the one hand or a complete escape from self on the other.  |  Negative |  \n",
     "| This movie is amazing because the fact that the real people portray themselves and their real life experience and do such a good job it's like they're almost living the past over again. Jia Hongsheng plays himself an actor who quit everything except music and drugs struggling with depression and searching for the meaning of life while being angry at everyone especially the people who care for him most.  | Positive  |\n",
     "    \n",
-    "    将下载好的数据集解压并放在当前工作目录下。\n",
+    "  将下载好的数据集解压并放在当前工作目录下。\n",
     "\n",
     "\n",
     "2. 下载GloVe文件\n",
@@ -5143,4 +5143,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
\ No newline at end of file
+}