案例python神经网络 Machine learning is a powerful set of techniques that allow computers to learn from data rather than having a human expert program a behavior by hand.

CSC 421/2516 Winter 2019
Neural Networks and Deep Learning
Overview
Machine learning is a powerful set of techniques that allow computers to learn from data rather than having a human expert program a behavior by hand. Neural networks are a class of machine learning algorithm originally inspired by the brain, but which have recently have seen a lot of success at practical applications. They’re at the heart of production systems at companies like Google and Facebook for face recognition, speech-to-text, and language understanding.

This course gives an overview of both the foundational ideas and the recent advances in neural net algorithms. Roughly the first 2/3 of the course focuses on supervised learning — training the network to produce a specified behavior when one has lots of labeled examples of that behavior. The last 1/3 focuses on unsupervised learning and reinforcement learning.

Policies (marking, prerequisites, etc.)
See the course information handout.

Where and When
There are two sections of the course. Since both sections are fully subscribed, please attend the one you are registered for.

Instructor Lecture Time Lecture Room Tutorial Time Tutorial Room
Section 1 Jimmy Ba Tuesday 1-2
Thursday 1-2 MS 2172 Thursday 2-3 MS 2172
Section 2 Roger Grosse Tuesday 6-8 BA 1170 Tuesday 8-9 BA 1170
Teaching Staff
Instructors: Roger Grosse, Jimmy Ba
Office Hours:
Roger: Monday 5-6pm in PT290F
Jimmy: Friday 1-2pm in PT290D
Head TA: Alex Adam
TAs: TBA
Staff emails:
TAs and instructors: csc421staff [at] cs.toronto.edu
Instructors and head TA only: csc421instructors [at] cs.toronto.edu
Please do not contact us at our personal emails.
We will use Piazza for the course forum. If your question is about the course material and doesn’t give away any hints for the homework, please post to Piazza so that the entire class can benefit from the answer.
projects
Most written homeworks and programming projects will be due on Thursdays at 11:59pm. Please see the course information handoutfor detailed policies (marking, lateness, etc.).

The following schedule is subject to change.

Out Due Materials Notes
Homework 1 1/18 1/24 [Handout]
Programming project 1 1/18 1/31 [Handout]
[Starter Code]
Homework 2 2/1 2/7
2/11 [Handout]
[maml.py]
Programming project 2 2/16 2/28 [Handout]
[Starter Code]
Homework 3 3/1 3/7 [Handout]
Homework 4 3/8 3/14 [Handout]
Programming project 3 3/15 3/21
3/22 [Handout]
[Starter Code]
Programming project 4 3/22 3/28
3/31 [Handout]
[Starter Code]
Homework 5 3/29 4/4 [Handout]
Grad Student Projects
Grad students will do a final project in place of the final exam. Students must form teams of 2-3. The deadline for proposals is March 1, but you are encouraged to submit a proposal earlier so that you can receive feedback earlier. The deadline for final reports is April 18 26. You can find the full project requirements here.

Tests
Midterm
All students (undergrads and grad students) must take the midterm test. It will be held from 6:10-7:40pm on Friday, Feb. 15, in EX 200 (Exam Centre). It will be a 90 minute exam.

It will cover up through Lecture 9 (conv nets). Only material covered in lecture will be tested, so we won’t test material that is only in the tutorials, readings, etc. However, we will place more emphasis on topics you’ve had an opportunity to practice in homeworks, tutorials, etc. There will be some conceptual questions, and some mathematical questions (similar to individual steps in the homeworks).

The format will be similar to CSC321 midterms from past years, so you might like to use these to practice. Note that the topics covered in different years might not correspond exactly.

2015 midterm: version 1 and solutions; version 2 and solutions. Note that this exam was too difficult, and the marks were adjusted upwards.
2017 midterm: version 1, version 2, and solutions.
2018 midterm: version 1, version 2, and solutions.
Here are the midterm questions and solutions.

Final Exam
Only undergrads will take the final exam. Grad students do a final project instead.

The exam will take place from 9am-noon on Thursday, April 25. The rooms are as follows:

Surname A-G: Bahen (BA) 2159
Surname H-Z: Medical Sciences (MS) 2158
No, it’s not a typo that it’s two different buildings with adjacent room numbers.
Practice exams. These are from CSC321, a third-year version of this course. All but 2017 and 2018 were with different instructors, and topics varied from year to year.