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4 days ago · Locally Stationary Distributions: A Framework for Analyzing Slow-Mixing Markov Chains. Kuikui Liu, Sidhanth Mohanty, Prasad Raghavendra, Amit Rajaraman, David X. Wu. Many natural Markov chains fail to mix to their stationary distribution in polynomially many steps. Often, this slow mixing is inevitable since it is computationally intractable to ...
4 days ago · Nevertheless, Markov chains can be shown to always converge quickly to measures that are *locally stationary*, i.e., measures that don't change over a small number of steps. These locally stationary measures are analogous to local minima in continuous optimization, while stationary measures correspond to global minima.
1 day ago · A central concern across the natural sciences is a quantitative understanding of the mechanism governing rare transitions between two metastable states. Recent research has uncovered a fundamental equality between the time-reversal asymmetry of the ensemble of such transition paths and the informativeness of system dynamics about the reactivity of a given trajectory, immediately leading to ...
3 days ago · The model included both a decision tree for acute psychosis and a lifetime Markov model reflecting maintenance treatment. The decision tree assessed adequate clinical response (defined as a ≥30% improvement in the PANSS total score), and the Markov model used 3-month cycles to assess relapse, treatment-emergent adverse events, treatment ...
Make sure you have an umbrella with you today in memory of Georgi Markov or for self-defence. John le Carré described Ben Macintyre’s The Spy and the Traitor as "the best true spy story I have ever read". Bill Fairclough’s spy novel Beyond Enkription was described as ”up there with My Silent War by Kim Philby”.
2 days ago · In mathematics, ergodicity expresses the idea that a point of a moving system, either a dynamical system or a stochastic process, will eventually visit all parts of the space that the system moves in, in a uniform and random sense.
4 days ago · Registered User. Jul 4, 2014. 9,879. 8,026. Saturday at 12:33 PM. #4. 2005 was a supreme year for goalies. The three of them deserves to be in the HOF IMO, but as far as "who is the best", it's Price for sure. danisonfire, Dutronc and slapKing.
