Perceptrons


Implementing The Perceptron Algorithm From Scratch In Python

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In this post, we will see how to implement the perceptron model using breast cancer data set in python. A perceptron is a fundamental unit of the neural network which takes weighted inputs, process it and capable of performing binary classifications. This is a follow up to my previous post on the Perceptron Model. If you want to skip the theory and jump into code directly click here. In the perceptron model inputs can be real numbers unlike the Boolean inputs in MP Neuron Model.


Perceptron Learning Algorithm SONAR Data Classification Edureka

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As you know a perceptron serves as a basic building block for creating a deep neural network therefore, it is quite obvious that we should begin our journey of mastering Deep Learning with perceptron and learn how to implement it using TensorFlow to solve different problems. In case you are completely new to deep learning, I would suggest you to go through the previous blog of this Deep Learning Tutorial series to avoid any confusion. Basically, a problem is said to be linearly separable if you can classify the data set into two categories or classes using a single line. On the contrary, in case of a non-linearly separable problems, the data set contains multiple classes and requires non-linear line for separating them into their respective classes. Let us visualize the difference between the two by plotting the graph of a linearly separable problem and non-linearly problem data set:Since, you all are familiar with AND Gates, I will be using it as an example to explain how a perceptron works as a linear classifier.


How to learn the maths of Data Science using your high school maths knowledge

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This post is a part of my forthcoming book on Mathematical foundations of Data Science. In this post, we use the Perceptron algorithm to bridge the gap between high school maths and deep learning. As part of my role as course director of the Artificial Intelligence: Cloud and Edge Computing at the University..., I see more students who are familiar with programming than with mathematics. They have last learnt maths years ago at University. And then, suddenly they find that they encounter matrices, linear algebra etc when they start learning Data Science.


Professor's perceptron paved the way for AI – 60 years too soon Cornell Chronicle

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In July 1958, the U.S. Office of Naval Research unveiled a remarkable invention. An IBM 704 – a 5-ton computer the size of a room – was fed a series of punch cards. After 50 trials, the computer taught itself to distinguish cards marked on the left from cards marked on the right. It was a demonstration of the "perceptron" – "the first machine which is capable of having an original idea," according to its creator, Frank Rosenblatt '50, Ph.D. '56. At the time, Rosenblatt – who later became an associate professor of neurobiology and behavior in Cornell's Division of Biological Sciences – was a research psychologist and project engineer at the Cornell Aeronautical Laboratory in Buffalo, New York.


The Basics of Recurrent Neural Networks (RNNs)

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Recurrent Neural Networks (RNNs) are widely used for data with some kind of sequential structure. For instance, time series data has an intrinsic ordering based on time. Sentences are also sequential, "I love dogs" has a different meaning than "Dogs I love." Simply put, if the semantics of your data is altered by random permutation, you have a sequential dataset and RNNs may be used for your problem! RNNs are different than the classical multi-layer perceptron (MLP) networks because of two main reasons: 1) They take into account what happened previously and 2) they share parameters/weights.


Auto-Rotating Perceptrons

arXiv.org Machine Learning

This paper proposes an improved design of the perceptron unit to mitigate the vanishing gradient problem. This nuisance appears when training deep multilayer perceptron networks with bounded activation functions. The new neuron design, named auto-rotating perceptron (ARP), has a mechanism to ensure that the node always operates in the dynamic region of the activation function, by avoiding saturation of the perceptron. The proposed method does not change the inference structure learned at each neuron. We test the effect of using ARP units in some network architectures which use the sigmoid activation function. The results support our hypothesis that neural networks with ARP units can achieve better learning performance than equivalent models with classic perceptrons.


Multiplierless and Sparse Machine Learning based on Margin Propagation Networks

arXiv.org Machine Learning

The new generation of machine learning processors have evolved from multi-core and parallel architectures (for example graphical processing units) that were designed to efficiently implement matrix-vector-multiplications (MVMs). This is because at the fundamental level, neural network and machine learning operations extensively use MVM operations and hardware compilers exploit the inherent parallelism in MVM operations to achieve hardware acceleration on GPUs, TPUs and FPGAs. A natural question to ask is whether MVM operations are even necessary to implement ML algorithms and whether simpler hardware primitives can be used to implement an ultra-energy-efficient ML processor/architecture. In this paper we propose an alternate hardware-software codesign of ML and neural network architectures where instead of using MVM operations and non-linear activation functions, the architecture only uses simple addition and thresholding operations to implement inference and learning. At the core of the proposed approach is margin-propagation based computation that maps multiplications into additions and additions into a dynamic rectifying-linear-unit (ReLU) operations. This mapping results in significant improvement in computational and hence energy cost. The training of a margin-propagation (MP) network involves optimizing an $L_1$ cost function, which in conjunction with ReLU operations leads to network sparsity and weight updates using only Boolean predicates. In this paper, we show how the MP network formulation can be applied for designing linear classifiers, multi-layer perceptrons and for designing support vector networks.


A Basic Perceptron Model Using Least Squares Method

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Just like the billions of neurons that make up the human nervous system, the perceptron is the basic unit of artificial intelligence. Every thought, action, emotion or decision that we make reflect the activities of the nervous system which is a master system that controls and communicates with every part of your body. Biological intelligence relies on this complex mechanism of billions of neurons organized in different layers that communicate with one another through electrical and chemical signals. To understand how biological intelligence is produced, it's important to understand how the basic building block called neuron functions. Similar to biological intelligence, artificial intelligence is produced by a complex network of basic building blocks called perceptron.


The Math behind Neural Networks: Part 1 - The Rosenblatt Perceptron

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This is the definition of a Linear Combination: it is the sum of some terms multiplied by constant values. In our case the terms are the features and the constants are the weights.


It's a No Brainer: An Introduction to Neural Networks

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Neural Networks are an approach to artificial intelligence that was first proposed in 1944. Modeled loosely on the human brain, Neural Networks consist of a multitude of simple processing nodes (called neurons) that are highly interconnected and send data through these network connections to estimate a target variable. In this article, I will discuss the structure and training of simple neural networks (specifically Multilayer Perceptrons, aka "vanilla neural networks"), as well as demonstrate a simple neural network. Question: Why do zombies only date intelligent women? Answer: They just love a woman with brains.