Updated ae1svm comments w/ parameters descriptions

[zhuox5]

All Submissions Basics:

• [x] Have you followed the guidelines in our Contributing document?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [x] Have you checked all Issues to tie the PR to a specific one?

All Submissions Cores:

• [x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] Have you written new tests for your core changes, as applicable?
• [x] Have you successfully ran tests with your changes locally?
• [ ] Does your submission pass tests, including CircleCI, Travis CI, and AppVeyor?
• [ ] Does your submission have appropriate code coverage? The cutoff threshold is 95% by Coversall.

New Model Submissions:

• [x] Have you created a .py in ~/pyod/models/?
• [x] Have you created a _example.py in ~/examples/?
• [x] Have you created a test_.py in ~/pyod/test/?
• [x] Have you lint your code locally prior to submission?

[coveralls]

Pull Request Test Coverage Report for Build 9766585377

Details

• 207 of 213 (97.18%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 94.267%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pyod/test/test_ae1svm.py	78	79	98.73%
pyod/utils/torch_utility.py	6	7	85.71%
pyod/models/ae1svm.py	123	127	96.85%
<!--	Total:	207	213	97.18%	-->

Totals
Change from base Build 9622700450:	0.1%
Covered Lines:	9569
Relevant Lines:	10151

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💛 - Coveralls