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The word and object 'cassandra' has a frequency score of 3.43 out of 7, which means that it is not a very popular word, but is used quite frequently in the english.
According to the english dictionary, some meanings of 'cassandra' include:
- (Greek mythology) a prophetess in Troy during the Trojan War whose predictions were true but were never believed (noun)
What is machine learning?
Machine learning is a popular application of artificial intelligence where a system gets the ability to learn automatically and improve from its experiences without being programmed explicitly. It focuses on developing computer programs that have access to data and can use that data to recognize patterns and improve on their own.
The process of machine learning begins with an observation that includes some instruction or experience. This data is then followed by a pattern to make informed decisions in the future based on the guidelines provided.
The primary goal of machine learning is to train computers in a way that they can learn automatically without any human intervention and adjust their actions accordingly.
Why Machine Learning is Important
Data is an essential block of almost all businesses. Data-driven decisions make all the difference between keeping up with the competition or falling behind.
Machine learning is the key for companies to unlock the value of customer data and make enacting decisions to stay at the top of their game. It has made it possible to automatically produce quick models that can analyze big as well as complex data and deliver fast as well as accurate results even if they are on a vast scale.
Different Types of Machine Learning
Machine learning algorithms are usually classified as supervised or unsupervised:
Supervised Machine Learning Algorithms
Supervised learning refers to a class of problem that uses a model to draw mapping between input data and the target variable. In this approach, you teach machines by example. During training, the machines are exposed to a broad set of labeled data and are trained to predict the outcome of future events.
For example, Facebook recently announced that it had 3.5 billion public images available on Instagram with hashtags used as labels. These billions of photos with labels attached to them are then trained using image-recognition and yield record levels of accuracy.
Unsupervised Machine Learning Algorithms
Unsupervised algorithms are designed to group similar data or anomalies that stand out in data. Their purpose is to identify patterns and spot the similarities that can split data into different categories. One of the famous examples of an unsupervised learning algorithm is Airbnb, where you create a cluster of accommodations that are available for rent. Another example is Google News, where similar stories are grouped each day.
Semi-Supervised Machine Learning Algorithms
As the name suggests, this algorithm is the mix of supervised and unsupervised learning. This technique uses a small amount of labeled data and a large amount of unlabeled data to train machines. Firstly, the labeled data partially train a machine learning model, and then this partially trained model labels all the unlabeled data. This process is called pseudo-labeling. Due to the rise in semi-supervised algorithms, the importance of labeled data for training machine systems is decreasing over time.
Reinforcement Machine Learning Algorithms
A reinforced machine learning algorithm is based on the trial and error search. In this method, the machines interact with the environment by producing actions and discover their rewards or errors. You can understand the reinforcement algorithm by thinking of a person who is trying to play a new game but is not familiar with the rules.
Eventually, by pressing different buttons and seeing what happens on the screen, his performance gets better. The same process is used in reinforcement learning. Trial, error, and reward are the essential characteristics of this machine learning algorithm.