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  1. en.wikipedia.org › wiki › Markov_chainMarkov chain - Wikipedia

    1 day ago · The continuous time Markov chain is characterized by the transition rates, the derivatives with respect to time of the transition probabilities between states i and j. Let X t {\displaystyle X_{t}} be the random variable describing the state of the process at time t , and assume the process is in a state i at time t .

  2. en.wikipedia.org › wiki › Atomic_clockAtomic clock - Wikipedia

    1 day ago · An atomic clock is based on a system of atoms which may be in one of two possible energy states. A group of atoms in one state is prepared, then subjected to microwave radiation. If the radiation is of the correct frequency, a number of atoms will transition to the other energy state.

  3. en.wikipedia.org › wiki › WildfireWildfire - Wikipedia

    1 day ago · A wildfire (or forest fire, bushfire) is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation. [1] [2] Depending on the type of vegetation present, a wildfire may be more specifically identified as a bushfire ( in Australia ), desert fire, grass fire, hill fire, peat fire, prairie fire, vegetation fire, or veld ...

  4. en.wikipedia.org › wiki › PainPain - Wikipedia

    1 day ago · Pain is a distressing feeling often caused by intense or damaging stimuli. The International Association for the Study of Pain defines pain as "an unpleasant sensory and emotional experience associated with, or resembling that associated with, actual or potential tissue damage." [1]

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