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Unlike MM in HMM state is hidden.

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13y ago

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Where can one find more information about hidden Markov models?

The hidden Markov model, which is a statistical Markov model, was developed by L. E. Baum and coworkers. Information about it can be found either online on websites like Wikipedia or in books about mathematics.


What has the author Matthew Stephen Ryan written?

Matthew Stephen Ryan has written: 'Dynamic character recognition using Hidden Markov Models'


Can SPSS tools do Markov Analysis?

Yes, SPSS can perform Markov Analysis, particularly through its advanced statistical procedures. Users can utilize the "Markov Chain" models available in SPSS to analyze probabilities of transitioning between different states over time. However, users may need to write custom syntax or use extensions for more complex Markov models, as the standard interface may not cover all specific requirements.


What has the author B L Markov written?

B. L. Markov has written: 'Fizicheskoe modelirovanie v metallurgii' -- subject(s): Mathematical models, Metallurgy


What has the author Francesco Bartolucci written?

Francesco Bartolucci has written: 'Latent Markov models for longitudinal data' -- subject(s): MATHEMATICS / Probability & Statistics / General, Markov processes


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What are the disadvantages of the Markov models?

Markov models, while useful for modeling stochastic processes, have several disadvantages. One key limitation is their assumption of the Markov property, which states that future states depend only on the current state and not on past states; this can lead to oversimplification in complex systems. Additionally, they often require a large amount of data to accurately estimate transition probabilities, and they may struggle with handling rare events or long-term dependencies. Finally, Markov models can be computationally intensive for large state spaces, making them less practical for certain applications.


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What are two examples of graphical models?

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What is the difference between artificial neural network and hidden Markov model methods?

An artificial neural network is a structure which will attempt to find a relationship i.e. a function between the inputs, and the provided output(s), in order that when the net be provided with unseen inputs, and according with the recorded internal data (named "weights"), will try to find a correct answer for the new inputs. Hidden Markov models, are used for find the states for which a given stochastic process went through. The main difference could be this: In order to use a markov chain, the process must depend only in it´s last state. For use a neural network, you need a lot of past data. After training process, neural networks are capable of predicting next states of the system based only on the last state. In addition, given the ability to measure the prediction error (for example, after actual event, signal or state has happend and was compared to prediction), the neural network is capable of adapting itself and capture online changes in the undergoing process to improve the model of prediction and decrease the estimation error for the next states. Theoretically such approach can eliminate the need in initial training, as the network started from some random model will eventually adapt itself to the actual process it tries to estimate given this feedback error loop and will start to make correct estimations / predictions after a certain amount of steps. In such setup one can assume that neural network can be used when no past data is available at all. In this case neural network build the model of the ongoing process "from scratch" based on the observations in the "online" mode.