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Why must a nonlinear activation function be used in a backpropagation neural network? [closed]

I've been reading some things on neural networks and I understand the general principle of a single layer neural network. I understand the need for aditional layers, but why are nonlinear activation functions used? ...
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Open Sublime Text from Terminal in macOS

In Terminal when I use .subl 26 Answers 26 ...
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Getting and removing the first character of a string

I would like to do some 2-dimensional walks using strings of characters by assigning different values to each character. I was planning to 'pop' the first character of a string, use it, and repeat for the rest of the string. ...
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Why doesn't std::queue::pop return value.?

I went through this page but I am not able to get the reason for the same . There it is mentioned that 7 Answers ...
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PHP best way to MD5 multi-dimensional array?

What is the best way to generate an MD5 (or any other hash) of a multi-dimensional array? 13 Answers ...
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Passing additional variables from command line to make

Can I pass variables to a GNU Makefile as command line arguments? In other words, I want to pass some arguments which will eventually become variables in the Makefile. ...
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How to search a specific value in all tables (PostgreSQL)?

... 8 Answers 8 Active ...
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How do I wrap a selection with an HTML tag in Visual Studio?

This seems like the most basic question in the world, but damned if I can find an answer. 8 Answers ...
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How to save a PNG image server-side, from a base64 data string

I'm using Nihilogic's "Canvas2Image" JavaScript tool to convert canvas drawings to PNG images. What I need now is to turn those base64 strings that this tool generates, into actual PNG files on the server, using PHP. ...
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How to create a directory and give permission in single command

How to create a directory and give permission in single command in Linux? 8 Answers 8 ...