and this is what my GPT Model wrote:
The simplest artificial neural network has a single hidden layer, which receives and filters incoming signals before it passes them on to the next layer. This is called a feed-forward network.
A second more complex type of neural network is called a back-propagation network.
The connection weights are updated by applying a simple learning rule: the signal at each connection (here, the sum of the signals at each neuron) is multiplied by the weight (or bias) and then summed to produce the new signal.
The new signal is the sum of the signals from all the neurons connected to the current neuron. This process is repeated for all the neurons that are connected to the current one. In other words, a neural network is a series of equations that are solved by “backpropagating” the incoming data through the network.
ANNs can be constructed in a number of different ways. In one construction or arrangement, the weights are given a predetermined set of numbers in the beginning and learned.
In another construction or arrangement, the weights and biases are pre-stored, and the network is trained by adjusting the weights and biases for each new data set that you feed it. The latter is called the “reinforcement learning” or reinforcement learning method.
In this way, a neural network provides a computer a way to reason about its internal states and the effect of those states on its overall behavior.
A neural network is typically designed so that it can “learn” itself. It then has the ability to continually adjust the weights and connections. This provides a very different way of handling the learning problem in an ANN.
The “learning rate” is a control parameter that is used to adjust the amount given to the weight at each time iteration. The learning rate is typically a hyper-parameter controlling the amount the weights are adjusted at each iteration. In general, the higher the learning rate, the faster the network is able to learn.
A smaller learning rate makes the network more conservative in its approach to learning. For instance, a learning rate equal to 0.001 is a very conservative approach, since it only changes the weights between each iteration.
In the reinforcement learning algorithm, the learning rate is fixed at a single value. This means the same solution can be reached from any starting point.
ANNs have been developed for a wide variety of tasks. Examples of ANNs include pattern recognition, and a class of “meta-learning” tasks that involve prior knowledge, such as speech recognition, and image recognition.
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