Results 21 to 30 of about 430,069 (325)
Causal Inference in Threshold Regression and the Neural Network Extension (TRNN)
Stats, 2023 The first-hitting-time based model conceptualizes a random process for subjects’ latent health status. The time-to-event outcome is modeled as the first hitting time of the random process to a pre-specified threshold.
Yiming Chen +2 more
doaj +1 more source
The likelihood of mixed hitting times [PDF]
Journal of Econometrics, 2021 We present a method for computing the likelihood of a mixed hitting-time model that specifies durations as the first time a latent Lévy process crosses a heterogeneous threshold. This likelihood is not generally known in closed form, but its Laplace transform is.
Abbring, Jaap, Salimans, Tim
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Glycomics Hits the Big Time [PDF]
Cell, 2010 Cells run on carbohydrates. Glycans, sequences of carbohydrates conjugated to proteins and lipids, are arguably the most abundant and structurally diverse class of molecules in nature. Recent advances in glycomics reveal the scope and scale of their functional roles and their impact on human disease.
Hart, Gerald W., Copeland, Ronald J.
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First Hitting Times to Intermittent Targets [PDF]
Physical Review Letters, 2019 In noisy environments such as the cell, many processes involve target sites that are often hidden or inactive, and thus not always available for reaction with diffusing entities. To understand reaction kinetics in these situations, we study the first hitting time statistics of a Brownian particle searching for a target site that switches stochastically
Mercado-Vásquez, Gabriel, Boyer, Denis
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Hitting Times of Some Critical Events in RNA Origins of Life
Life, 2021 Can a replicase be found in the vast sequence space by random drift? We partially answer this question through a proof-of-concept study of the times of occurrence (hitting times) of some critical events in the origins of life for low-dimensional RNA ...
Caleb Deen Bastian, Hershel Rabitz
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Hitting time distributions in financial markets [PDF]
Physica A: Statistical Mechanics and its Applications, 2007 We analyze the hitting time distributions of stock price returns in different time windows, characterized by different levels of noise present in the market. The study has been performed on two sets of data from US markets. The first one is composed by daily price of 1071 stocks trade for the 12-year period 1987-1998, the second one is composed by high
Davide Valenti +2 more
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Hitting time distributions for efficient simulations of drift‐diffusion processes
Engineering Reports, 2020 Numerical solutions to partial differential equations in anisotropic, heterogeneous media obtained by their probabilistic representations are useful for a number of purposes, including our own interests in biomedical simulations.
Raghu Raghavan
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Quantum walks with infinite hitting times [PDF]
, 2006 Hitting times are the average time it takes a walk to reach a given final vertex from a given starting vertex. The hitting time for a classical random walk on a connected graph will always be finite.
A. Ambainis +12 more
core +2 more sources
Asian Pacific Journal of Tropical Medicine, 2021 Objective: To define the alert levels for the total number of COVID-19 cases derived by using quantile functions to monitor COVID-19 outbreaks via an exponentially weighted moving-average (EWMA) control chart based on the first hitting time of the total ...
Areepong Yupaporn, Sunthornwat Rapin
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Hitting Time of Quantum Walks with Perturbation [PDF]
, 2011 The hitting time is the required minimum time for a Markov chain-based walk (classical or quantum) to reach a target state in the state space. We investigate the effect of the perturbation on the hitting time of a quantum walk.
A. Childs +18 more
core +1 more source