Tag: aiworld.tech.blog

What is Machine Learning? Does a Machine Learn?

One of the most asked questions is How can a Machine Learn? Actually it can.

How does it learn? How do we teach a machine to learn? We give it examples.

We give many examples to the Machine.

We take training data to teach a machine or an algorithm to do prediction accurately

E.g. we take a new data sample and the machine should Predict Y.

We take a Predictive model, which takes the Training Data which are historical data and produces the Output.

We create mathematical Model with Training set and then we give the model a new example which is not in training set and the model give the output y.

A model is characterized by a set of parameters and the Goal is to learn those parameters and after learning is done, we take new data and Predict the Outcome.

Why ML ?

Machine Learning has been a study for many years now. Its in recent Years that because of High performance and accuracy, it has been more interesting . One of the areas of ML is Imgae Processing.

In many cases, its analysing complex images and Labeling them with very high accuracy and in some cases even better than Human beings.

These are complex Images and Machine is doing very accurate Job here. This is Image net challenge and its there for Years.

It can outperform humans in some areas.

There are lot of applications in medicine such as ophthalmology, dermatology which are more on Image Analysis.

Also in Playing sophisticated games, it has shown remarkable performance by solving complex sequential Problem. In some games Machine has defeated human beings.

Amazing Popular Terms used in AI

  • CNN and ANN and RNN

CNN, ANN, and RNN are all types of neural networks used in machine learning and artificial intelligence, each with its own specific architecture and use cases:

  1. ANN (Artificial Neural Network):
    • An ANN is a computational model inspired by the way biological neural networks in the human brain process information. It consists of layers of interconnected nodes (neurons), where each connection has an associated weight. ANNs are used for a variety of tasks, including classification, regression, and pattern recognition. They are the foundational architecture for more specialized neural networks like CNNs and RNNs.
  2. CNN (Convolutional Neural Network):
    • CNNs are a type of neural network specifically designed for processing structured grid data, such as images. They use a mathematical operation called convolution to automatically and adaptively learn spatial hierarchies of features from input data. CNNs are particularly effective for image recognition and classification tasks due to their ability to capture spatial and temporal dependencies in an image through the use of filters and pooling layers.
  3. RNN (Recurrent Neural Network):
    • RNNs are designed to recognize patterns
  • Bias

In the context of machine learning and neural networks, “bias” can refer to a couple of different concepts:

  1. Bias in Neural Networks:
    • In neural networks, bias is a parameter that is added to the weighted sum of inputs to a neuron. It allows the activation function to be shifted to the left or right, which can be crucial for the model to learn the correct mapping from inputs to outputs. Bias terms help the model fit the data better by providing additional degrees of freedom. In mathematical terms, if a neuron computes a weighted sum of inputs as ( z = w_1x_1 + w_2x_2 + \ldots + w_nx_n ), the bias ( b ) modifies this to ( z = w_1x_1 + w_2x_2 + \ldots + w_nx_n + b ).
  2. Bias in Machine Learning Models:
    • Bias in this context refers to the error introduced by approximating a real-world problem, which may be complex, by a simplified model. This is part of the bias-variance tradeoff, a fundamental concept in machine learning. A model with high bias pays very little attention to the training data and oversimplifies the model, which can lead to under
  • Backward Propagation

Also known as back prop, this is the process of back tracking errors through the weights of the network after forward propagating inputs through the network. This is used by applying the chain rule in calculus.

Bounding Box

Cognitive Computing

Machine Learning

Deep Learning

corpus

Entity Annotation

Entity Extraction

Computer Vision

HyperParameter

Intent

Linguistic Annotation

Model

NLG and NLP and NLU

Overfitting

Parameter

Predictive Analysis

Supervised Learning and Unsupervised Learning and Reinforcement Learning

Semantic Annotation

Sentiment Analysis

General AI and Strong AI and Weak AI

Transfer Learning

Turing Test

GAN – Generative Adversarial Network

Heuristic

Perceptron: Single Neuron.

Logistic Regression or Sig-moid Function σ

A function used to activate the weights Network in Interval of 0,1; This function graph looks like a S which is told as Sigma in Greek. This is also known as Logistic Regression.

OpenAI is Open source : ?

OpenAI is not entirely open source. While OpenAI has released some of its models and code as open source, such as the original GPT (Generative Pre-trained Transformer) and certain versions of its reinforcement learning algorithms, many of its more advanced models, like GPT-3 and GPT-4, are not open source. These models are accessible through APIs, which allow developers to integrate them into applications, but the underlying code and model weights are not publicly available. OpenAI has taken this approach to balance the benefits of open research with concerns about safety, security, and misuse of powerful AI technologies.