[DOC]Update documents

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Description

(Brief description on what this PR is about)

What does this implement/fix? Explain your changes.

Merge examples pr:
1.Update formula.ipynb
2.Update tree.ipynb
3.Update parse.ipynb
4.Update test_gensim_luna_stem_tf_d2v_256.bin
5.Update test_stopwords.txt
6.Update tokenizer.ipynb
7.Update get_pretrained_i2v.ipynb
8.Update get_pretrained_t2v.ipynb
9.Update i2v.ipynb
10.Update t2v.ipynb

Update pic and rst:
1.Update data.png
2.Update formula.png
3.Update i2v.png
4.Update parse.png
5.Update prepare_dataset.jpg
6.Update seg.png
7.Update sif_addition.png
8.Update tokenizer.png
9.Update conf.py
10.Update parse.rst
11.Update 公式语法结构解析.rst
12.Update 文本语法结构解析.rst
13.Update pretrain.rst
14.Update seg.rst
15.Update 结构成分分解.rst
16.Update 语义成分分解.rst

Pull request type

• [DATASET] Add a new dataset
• [BUGFIX] Bugfix
• [FEATURE] New feature (non-breaking change which adds functionality)
• [BREAKING] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [STYLE] Code style update (formatting, renaming)
• [REFACTOR] Refactoring (no functional changes, no api changes)
• [BUILD] Build related changes
• [DOC] Documentation content changes
• [OTHER] Other (please describe):

Changes

1.Update data.png
2.Update formula.png
3.Update i2v.png
4.Update parse.png
5.Update prepare_dataset.jpg
6.Update seg.png
7.Update sif_addition.png
8.Update tokenizer.png
9.Update conf.py
10.Update parse.rst
11.Update 公式语法结构解析.rst
12.Update 文本语法结构解析.rst
13.Update pretrain.rst
14.Update seg.rst
15.Update 结构成分分解.rst
16.Update 语义成分分解.rst
17.Update formula.ipynb
18.Update tree.ipynb
19.Update parse.ipynb
20.Update test_gensim_luna_stem_tf_d2v_256.bin
21.Update test_stopwords.txt
22.Update tokenizer.ipynb
23.Update get_pretrained_i2v.ipynb
24.Update get_pretrained_t2v.ipynb
25.Update i2v.ipynb
26.Update t2v.ipynb

Does this close any currently open issues?

N/A

Any relevant logs, error output, etc?

N/A

Checklist

Before you submit a pull request, please make sure you have to following:

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [FEATURE], [BREAKING], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage and al tests passing
• Code is well-documented (extended the README / documentation, if necessary)
• If this PR is your first one, add your name and github account to AUTHORS.md

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here