Machine Learning Applications in Real-World Industries

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Posted Oct 31, 2024

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Machine learning is no longer just a buzzword in the tech industry. It's being used in real-world industries to drive innovation and efficiency.

In healthcare, machine learning is being used to detect diseases earlier and more accurately than human doctors. For example, Google's AI-powered LYNA system can detect breast cancer from medical images with a high degree of accuracy.

Machine learning is also being used in finance to detect fraudulent transactions and prevent cyber attacks. In fact, banks are using machine learning algorithms to analyze customer behavior and detect suspicious activity.

The use of machine learning in these industries is not just about automating tasks, but about making a real difference in people's lives.

Data Analysis

Data analysis is a crucial step in machine learning, and it involves extracting insights and knowledge from data. Machine learning and data mining often employ the same methods, but while machine learning focuses on prediction, data mining focuses on the discovery of unknown properties in the data.

For more insights, see: Elements in Statistical Learning

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Machine learning uses various types of data, including structured, semi-structured, and unstructured data. Structured data is highly organized and easily accessed, while unstructured data is more difficult to capture, process, and analyze. Semi-structured data falls somewhere in between, with certain organizational properties that make it easier to analyze.

Machine learning can analyze various types of data, including cybersecurity datasets, smartphone datasets, IoT data, agriculture and e-commerce data, and health data. These datasets can be in different types, such as structured, semi-structured, and unstructured data, which may vary from application to application.

Machine learning can also analyze social media data, including posts, comments, and personal updates. This analysis can help businesses track their brand health, improve reputation, and understand customer feedback. Machine learning can analyze the context behind words, not just the words themselves, and can track the differences between happy, unhappy, interested, or sarcastic messages.

Here are some applications of machine learning for social media analysis:

  • Lionbridge: a sentiment-analysis tool that provides insights based on social media posts in more than 300 languages.
  • Scale AI: a data analysis company that processes information from social media, online searches, posts, databases, using AI and ML algorithms.
  • Monkey Learn: a text classification software that allows users to analyze text without being limited to social media posts only.

Data Mining

Credit: youtube.com, 1.3 Applications (Data Mining and Machine Learning)

Data mining is a crucial aspect of machine learning, and it's often confused with machine learning itself. Data mining focuses on discovering previously unknown properties in data, whereas machine learning focuses on prediction based on known properties learned from the training data.

Machine learning and data mining often employ the same methods, but with different goals. Machine learning uses data mining methods as unsupervised learning or as a preprocessing step to improve learner accuracy. Data mining, on the other hand, uses machine learning methods to discover new knowledge.

Data mining is particularly useful in applications where there's no labeled data available, making it ideal for exploratory data analysis, customer segmentation, and image and pattern recognition.

For another approach, see: Proximal Gradient Methods for Learning

Unsupervised

Unsupervised learning is a type of machine learning where algorithms analyze unlabeled data to identify patterns and group data points into subsets. This method doesn't require labeled data, making it ideal for exploratory data analysis and discovering hidden patterns.

Credit: youtube.com, Supervised vs. Unsupervised Learning

Unsupervised learning algorithms can be used for various tasks, including clustering, dimensionality reduction, and anomaly detection. They can also help identify unusual data points in a data set using anomaly detection algorithms.

Clustering algorithms, such as k-means clustering, group similar data points together based on their characteristics. This can be useful for customer segmentation and image recognition.

Some common applications of unsupervised learning include:

  • Splitting the data set into groups based on similarity using clustering algorithms.
  • Identifying unusual data points in a data set using anomaly detection algorithms.
  • Discovering sets of items in a data set that frequently occur together using association rule mining.
  • Decreasing the number of variables in a data set using dimensionality reduction techniques.

Dimensionality reduction techniques, such as principal component analysis (PCA), can be used to reduce the number of variables in a data set. This can make it easier to analyze and visualize the data.

Association Rule

Association rules are a type of rule-based machine learning method that discovers relationships between variables in large databases.

They are intended to identify strong rules discovered in databases using some measure of "interestingness". Association rule learning is a rule-based machine learning method for discovering relationships between variables in large databases.

The defining characteristic of association rule learning is the identification and utilization of a set of relational rules that collectively represent the knowledge captured by the system.

Credit: youtube.com, Market Basket Analysis [Association Analysis]

For example, the rule {onions,potatoes}⇒⇒ {burger} found in the sales data of a supermarket would indicate that if a customer buys onions and potatoes together, they are likely to also buy hamburger meat.

Such information can be used as the basis for decisions about marketing activities such as promotional pricing or product placements.

Association rules are employed today in application areas including market basket analysis, Web usage mining, intrusion detection, continuous production, and bioinformatics.

Machine Learning Algorithms

Machine learning algorithms are the backbone of machine learning applications. They enable computers to learn from data and make predictions or decisions without being explicitly programmed.

Classification algorithms, such as logistic regression, are used when the outputs are restricted to a limited set of values. For example, a classification algorithm can filter emails and assign them to a specific folder.

Regression analysis, on the other hand, is used when the outputs may have any numerical value within a range. It can be used for applications such as predicting the height of a person or the future temperature.

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Artificial neural networks, or connectionist systems, are computing systems vaguely inspired by the biological neural networks that constitute animal brains. They can learn to perform tasks by considering examples, generally without being programmed with any task-specific rules.

Deep learning, a type of artificial neural network, consists of multiple hidden layers and tries to model the way the human brain processes light and sound into vision and hearing. It has been used for successful applications in computer vision and speech recognition.

Tasks and Algorithms

Machine learning algorithms are diverse and can be categorized into different types. Supervised learning, for instance, supplies algorithms with labeled training data and defines which variables the algorithm should assess for correlations.

Supervised learning algorithms are used for various tasks, including binary classification, multiclass classification, ensemble modeling, and regression modeling. These tasks involve predicting continuous values based on relationships within data.

Some popular supervised learning algorithms include support-vector machines, logistic regression, and decision trees. Support-vector machines, for example, are a set of related supervised learning methods used for classification and regression.

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Decision trees are a type of predictive model that uses a decision tree as a predictive model to go from observations about an item to conclusions about the item's target value. They can be used for both predicting numerical values and classifying data into categories.

Machine learning algorithms can also be categorized based on the type of data they use. Semi-supervised learning, for instance, uses a smaller labeled data set to guide classification and feature extraction from a larger, unlabeled data set. This type of learning can solve the problem of not having enough labeled data for a supervised learning algorithm.

Some popular machine learning algorithms include Gaussian processes, which are stochastic processes in which every finite collection of random variables has a multivariate normal distribution. They rely on a pre-defined covariance function, or kernel, that models how pairs of points relate to each other depending on their locations.

Here are some common machine learning algorithms and their uses:

  • Supervised learning: binary classification, multiclass classification, ensemble modeling, regression modeling
  • Semi-supervised learning: solving the problem of not having enough labeled data for a supervised learning algorithm
  • Decision trees: predicting numerical values and classifying data into categories
  • Support-vector machines: classification and regression
  • Gaussian processes: modeling relationships between variables using a pre-defined covariance function

Machine learning algorithms can be used for a wide range of tasks, from predicting house prices to analyzing social media posts. By understanding the different types of machine learning algorithms and their uses, we can better appreciate the power and potential of machine learning in various applications.

Bayesian Networks

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Bayesian networks are a type of probabilistic graphical model that represent random variables and their conditional independence with a directed acyclic graph (DAG).

They can be used to represent the relationships between diseases and symptoms, allowing us to compute the probabilities of the presence of various diseases given symptoms.

Efficient algorithms exist for performing inference and learning in Bayesian networks, making them a practical tool for many applications.

Genetic Algorithms

Genetic algorithms are search algorithms that mimic the process of natural selection to find good solutions to a given problem.

They use methods like mutation and crossover to generate new genotypes, which is a key concept in genetic algorithms.

Genetic algorithms were used in machine learning in the 1980s and 1990s, marking an early application of these algorithms.

Machine learning techniques have been used to improve the performance of genetic and evolutionary algorithms, showing the reciprocal relationship between these two fields.

Artificial Neural Networks

Artificial neural networks are computing systems inspired by the biological neural networks that make up animal brains. They "learn" to perform tasks by considering examples, generally without being programmed with any task-specific rules.

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ANNs are based on a collection of connected units or nodes called "artificial neurons", which loosely model the neurons in a biological brain. Each connection, like the synapses in a biological brain, can transmit information, a "signal", from one artificial neuron to another.

Artificial neural networks have been used on a variety of tasks, including computer vision, speech recognition, machine translation, social network filtering, playing board and video games and medical diagnosis. They're effective for tasks such as image and speech recognition.

Deep learning, a subfield of machine learning, focuses on models with multiple levels of neural networks, known as deep neural networks. These models can automatically learn and extract hierarchical features from data.

Artificial neural networks have a huge number of linked processing nodes, similar to the human brain. This allows them to recognize patterns and perform complex tasks.

The connections between artificial neurons are called "edges", and artificial neurons and edges typically have a weight that adjusts as learning proceeds. This weight increases or decreases the strength of the signal at a connection.

Model Training and Optimization

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Training machine learning models requires a high quantity of reliable data to perform accurate predictions. This data can come from various sources, including text, images, sensor data, and user interactions.

Overfitting is a significant concern when training models, as it can lead to biased or undesired predictions. To avoid this, machine learning engineers must carefully evaluate the data and ensure it's representative of the problem they're trying to solve.

To build the right machine learning model, follow a seven-step plan that includes understanding the business problem, identifying data needs, collecting and preparing data, determining the model's features, training and validating the model, evaluating its performance, and deploying it in production.

Here are some key techniques used in training and optimizing machine learning models:

  • Regularization: helps prevent overfitting by adding a penalty term to the loss function.
  • Backpropagation: an algorithm used to train artificial neural networks by minimizing the error between predicted and actual outputs.
  • Transfer learning: allows models to leverage pre-trained weights and fine-tune them for a specific task.
  • Adversarial machine learning: a technique used to train models to be robust against adversarial attacks, which are designed to mislead the model.

Training Models

Training models requires a high quantity of reliable data to perform accurate predictions. Machine learning engineers need to target and collect a large and representative sample of data, which can be as varied as a corpus of text, a collection of images, sensor data, or data collected from individual users of a service.

Credit: youtube.com, Scaling & Optimizing the Training of Predictive Models

It's essential to watch out for overfitting, a common issue when training machine learning models. Trained models derived from biased or non-evaluated data can result in skewed or undesired predictions, which can lead to detrimental outcomes.

To avoid biased models, machine learning engineers need to prepare data thoroughly before training. This includes cleaning and labeling the data, replacing incorrect or missing data, reducing noise, and removing ambiguity. Data from the training set should be split into training, test, and validation sets to ensure the model is not overfitting.

Machine learning ethics is becoming a crucial aspect of machine learning engineering, and it's essential to consider transparency and bias reduction when developing a model. By taking these steps, machine learning engineers can create models that are accurate, reliable, and fair.

Model Assessments

Model assessments are crucial in determining the performance of machine learning models. Classification models can be validated using accuracy estimation techniques like the holdout method, which splits the data into a training set and a test set.

Credit: youtube.com, How to evaluate ML models | Evaluation metrics for machine learning

The holdout method uses a conventional 2/3 training set and 1/3 test set designation, but this can be adjusted depending on the specific needs of the project. This method evaluates the performance of the training model on the test set.

The K-fold-cross-validation method randomly partitions the data into K subsets and then performs K experiments, each using one subset for evaluation and the remaining K-1 subsets for training the model. This approach provides a more robust estimate of the model's performance.

Sensitivity and specificity are often reported as True Positive Rate (TPR) and True Negative Rate (TNR) respectively. However, these rates are ratios that fail to reveal their numerators and denominators.

The total operating characteristic (TOC) is a more effective method to express a model's diagnostic ability, as it shows the numerators and denominators of the previously mentioned rates. TOC provides more information than the commonly used receiver operating characteristic (ROC) and ROC's associated area under the curve (AUC).

Discover more: Action Model Learning

Applications and Industries

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Machine learning has numerous applications across various industries, including agriculture, astronomy, and banking. Netflix used machine learning to improve its movie recommendation algorithm, reducing the gap between predicted and actual ratings.

Machine learning is being used in various sectors to improve efficiency and accuracy. For example, in the financial services industry, Capital One uses machine learning to boost fraud detection and deliver personalized customer experiences. In the pharmaceuticals industry, Eli Lilly has built AI and ML models to find the best sites for clinical trials and boost participant diversity.

Machine learning is also being used in the retail industry, with Walmart deploying a generative AI tool to help its employees with content generation and summarizing large documents. In the healthcare industry, machine learning is being used to analyze patient data and improve diagnosis accuracy, with platforms like Kensci and PathAI providing predictive healthcare services.

Examples by Industry

Machine learning is transforming industries in various ways, from finance to healthcare. For instance, Capital One is using machine learning to boost fraud detection and deliver personalized customer experiences. The company is also using the MLOps methodology to deploy machine learning applications at scale.

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In the pharmaceutical industry, drug makers are using machine learning for drug discovery, clinical trials, and drug manufacturing. Eli Lilly has built AI and ML models to find the best sites for clinical trials and boost participant diversity, resulting in sharply reduced clinical trial timelines.

Insurance companies are also leveraging machine learning to analyze driving data, offering lower rates to safe drivers. Progressive Corp.'s Snapshot program is a notable example, using machine learning algorithms to analyze driving data and offer lower rates to safe drivers.

Retailers like Walmart are using machine learning to improve operations and customer experiences. The company has deployed My Assistant, a generative AI tool to help its employees with content generation and summarizing large documents.

Here are some examples of machine learning applications by industry:

  • Financial services: Capital One uses machine learning for fraud detection and personalized customer experiences.
  • Pharmaceuticals: Eli Lilly uses machine learning for drug discovery and clinical trials.
  • Insurance: Progressive Corp.'s Snapshot program uses machine learning for driving data analysis.
  • Retail: Walmart uses machine learning with My Assistant to improve employee productivity.

Belief Functions

Belief functions are a powerful tool for reasoning with uncertainty, with connections to other frameworks like probability and possibility theories. They're particularly useful in machine learning applications where ambiguity and uncertainty are common.

Credit: youtube.com, Belief functions: past, present and future - Cuzzolin, Harvard Statistics

Machine learning approaches that rely on belief functions often use a fusion approach of various ensemble methods to handle decision boundaries and low sample sizes. This is because standard machine learning approaches tend to struggle with these issues.

In the machine learning domain, belief functions are often used to quantify ignorance and uncertainty. They can be thought of as a kind of learner that has analogous properties to how evidence is combined.

The computational complexity of belief function algorithms can be a challenge, especially when dealing with a large number of propositions (classes). This can lead to higher computation times compared to other machine learning approaches.

Belief functions have applications in various fields, including Machine learningCyberneticsLearning, where they can be used to make more informed decisions in the presence of uncertainty.

Frameworks and Libraries

Frameworks and libraries are the building blocks for machine learning model development, providing collections of functions and algorithms that make it easier to design, train, and deploy models. They are often used interchangeably, but a framework is a comprehensive environment with high-level tools and resources, whereas a library is a collection of reusable code for particular tasks.

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TensorFlow is an open-source machine learning framework originally developed by Google, widely used for deep learning due to its extensive support for neural networks and large-scale machine learning. PyTorch is another open-source framework known for its flexibility and ease of use, also popular for deep learning models.

Keras is a user-friendly Python library that acts as an interface for building and training neural networks, often used as a high-level API for TensorFlow and other backends. Scikit-learn is an open-source Python library for data analysis and machine learning, ideal for tasks such as classification, regression, and clustering.

Some of the most common machine learning frameworks and libraries include:

  • TensorFlow
  • PyTorch
  • Keras
  • Scikit-learn
  • OpenCV
  • NLTK

Importance and Ethics

Machine learning has the potential to make decisions in technical fields, relying heavily on data and historical information, which can be objective and logical. However, it can also learn biases from human languages, which contain prejudices.

The lack of diversity in the field of AI is a significant concern, with only 16.1% of AI faculty members being female, and the majority of new U.S. resident AI PhD graduates identifying as white or Asian.

Machine learning can be a game-changer in industries like healthcare, but it requires careful consideration to ensure that it's designed in the public's interest, not just as a profit-generating machine.

Bias

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Machine learning systems can suffer from different data biases, depending on the approach used. This can lead to inaccurate predictions and decisions.

A machine learning system trained specifically on current customers may not be able to predict the needs of new customer groups that are not represented in the training data.

Language models learned from data have been shown to contain human-like biases, such as racial and sexist language. In an experiment carried out by ProPublica, a machine learning algorithm falsely flagged "black defendants high risk twice as often as white defendants."

Google Photos would often tag black people as gorillas in 2015, and this issue was still not well resolved in 2018. This is just one example of how machine learning systems can perpetuate biases present in society.

The lack of diversity in the field of AI is also a contributing factor to the presence of biases in machine learning systems. According to research carried out by the Computing Research Association in 2021, "female faculty merely make up 16.1%" of all faculty members who focus on AI among several universities around the world.

Importance of Human-Interpretable

Credit: youtube.com, Interpretable vs Explainable Machine Learning

Human-interpretable machine learning is crucial for industries with heavy compliance burdens, such as banking and insurance, where explainable models are a must.

The importance of explainable, transparent models will only grow as machine learning evolves, and researchers at AI labs like Anthropic are already making progress in understanding how generative AI models work.

Developing ML models that are understandable and explainable by humans has become a priority due to rapid advances in and adoption of sophisticated ML techniques.

In fact, explainable AI (XAI) techniques are being used to make complex ML models more comprehensible to human observers, and researchers are refining the mental models of users of AI-powered systems to help them perform more effectively.

XAI may even be an implementation of the social right to explanation, ensuring that users understand the decisions made by AI systems.

Interpretable ML techniques, such as decision trees, linear regression, and Bayesian networks, aim to make a model's decision-making process clearer and more transparent.

A different take: Human in the Loop Approach

Credit: youtube.com, Importance of Human Interpretable models & Explainable A.I

These techniques provide a visual representation of decision paths, explain predictions based on weighted sums of input features, and represent dependencies among variables in a structured and interpretable way.

Explainable AI (XAI) techniques, such as LIME and SHAP values, are used after the fact to make the output of more complex ML models more comprehensible to human observers.

These techniques approximate the model's behavior locally with simpler models to explain individual predictions and assign importance scores to each feature to clarify how they contribute to the model's decision.

See what others are reading: Decision Tree Algorithm Machine Learning

Careers and Tools

Machine learning has opened up a wide range of career opportunities, from data scientist to machine learning engineer.

Data scientists with expertise in machine learning can earn salaries ranging from $118,000 to over $170,000 per year.

To succeed in these careers, you'll need to develop skills in programming languages like Python and R, as well as experience with popular machine learning tools such as TensorFlow and Scikit-learn.

These tools can help you build and deploy machine learning models more efficiently, and are essential for many machine learning applications.

Careers in AI

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The AI job market is booming, with the global AI market value expected to reach nearly $2 trillion by 2030. This growth requires a skilled workforce, making it an exciting time to consider a career in AI.

If you're interested in building a team, check out how to build and organize a machine learning team. This will give you a solid foundation for managing a team of skilled professionals.

As you progress in your AI career, you'll likely face interviews. Being prepared is key, so prep with 19 machine learning interview questions and answers.

If you're looking to boost your credentials, consider one of these 4 popular machine learning certificates to get in 2024.

Tools and Platforms

Machine learning platforms are integrated environments that provide tools and infrastructure to support the ML model lifecycle. They offer functionalities such as data management, model development, training, validation, and deployment, as well as post-deployment monitoring and management.

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Cloud providers like Google, Amazon, and Microsoft offer their own ML platforms, which integrate well with their cloud ecosystems. These platforms include tools for model development, training, and deployment, including AutoML and MLOps capabilities.

Some popular third-party and open source ML platforms include IBM Watson Studio, Databricks, Snowflake, and DataRobot. These platforms offer various features such as collaboration tools, data warehousing, and support for ML and data science workloads.

The choice of platform often depends on the organization's existing IT environment. For example, IBM Watson Studio integrates well with IBM Cloud, while Databricks offers a unified analytics platform for big data processing.

Here are some key features of popular ML platforms:

What's the Future of?

The future of machine learning is exciting and rapidly evolving. Breakthroughs in AI and ML occur frequently, rendering accepted practices obsolete almost as soon as they're established.

Several emerging trends are shaping the future of machine learning. These trends include natural language processing (NLP), computer vision, enterprise technology, and interpretable machine learning (ML) and explainable AI (XAI).

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NLP is becoming more prominent, enabling sophisticated content creation and enhanced human-computer interactions. Large language models are becoming more prominent, enabling sophisticated content creation and enhanced human-computer interactions.

Computer vision is expected to have a profound effect on many domains, including healthcare, environmental science, and software engineering. In healthcare, it plays an increasingly important role in diagnosis and monitoring.

Enterprise technology is racing to sign customers up for AutoML platform services that cover the spectrum of ML activities. These services include data collection, preparation and classification; model building and training; and application deployment.

Interpretable ML and XAI are gaining traction as organizations attempt to make their ML models more transparent and understandable. Techniques such as LIME, SHAP, and interpretable model architectures are increasingly integrated into ML development.

Companies face challenges in adapting legacy infrastructure to accommodate ML systems, mitigating bias and other damaging outcomes, and optimizing the use of machine learning to generate profits while minimizing costs.

Keith Marchal

Senior Writer

Keith Marchal is a passionate writer who has been sharing his thoughts and experiences on his personal blog for more than a decade. He is known for his engaging storytelling style and insightful commentary on a wide range of topics, including travel, food, technology, and culture. With a keen eye for detail and a deep appreciation for the power of words, Keith's writing has captivated readers all around the world.

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