Bayes%20(Belief)%20networks%20

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Bayes (Belief) networks M?ng Bayes (hay ni?m
tin)

• Conditional independence Ð?c l?p có di?u ki?n
• Syntax and semantics Cú pháp và ng? nghia
• Exact inference - Suy di?n chính xác
• Approximate inference Suy di?n x?p x?

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Independence Ð?c l?p (hoàn toàn d?c l?p)
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Conditional independence Ð?c l?p có di?u ki?n
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Conditional independence Ð?c l?p có di?u ki?n
(ti?p)
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Conditional independence Ð?c l?p có di?u ki?n
(ti?p)
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Conditional independence Ð?c l?p có di?u ki?n
(ti?p)
P(Cavity),P(Cavity)
Cavity
Toothache
Catch
P(ToothacheCavity), P(ToothacheCavity), P(Tooth
acheCavity), P(ToothacheCavity)
P(CatchCavity), P(CatchCavity), P(CatchCavity
), P(CatchCavity)
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Belief networks M?ng ni?m tin
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Example Ví d? v? m?ng ni?m tin
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Semantics Ng? nghia
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Semantics Ng? nghia
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Constructing belief networks Xây d?ng m?ng ni?m
tin
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Inference in Bayes (belief) networks

• Exact inference by enumeration
• Exact inference by variable elimination
• Approximate inference by stochastic simulation
• Approximate inference by Markov chain Monte Carlo
  (MCMC)