Results 31 to 40 of about 3,983,437 (321)

Assessing Goodness-of-Fit in Marked-Point Process Models of Neural Population Coding via Time and Rate Rescaling

open access: yesbioRxiv, 2020
Marked-point process models have recently been used to capture the coding properties of neural populations from multi-unit electrophysiological recordings without spike sorting.
A. Yousefi   +3 more
semanticscholar   +1 more source

First Passage Analysis in a Queue with State Dependent Vacations

open access: yesAxioms, 2022
This paper deals with a single-server queue where the server goes on maintenance when the queue is exhausted. Initially, the maintenance time is fixed by deterministic or random number T.
Jewgeni H. Dshalalow, Ryan T. White
doaj   +1 more source

An Unsupervised Retinal Vessel Extraction and Segmentation Method Based On a Tube Marked Point Process Model

open access: yesIEEE International Conference on Acoustics, Speech, and Signal Processing, 2020
Retinal vessel extraction and segmentation is essential for supporting diagnosis of eye-related diseases. In recent years, deep learning has been applied to vessel segmentation and achieved excellent performance. However, these supervised methods require
Tianyu Li, M. Comer, J. Zerubia
semanticscholar   +1 more source

Research on Financial Default Model with Stochastic Intensity Using Filtered Likelihood Method

open access: yesMathematics, 2023
This paper investigates the financial default model with stochastic intensity by incomplete data. On the strength of the process-designated point process, the likelihood function of the model in the parameter estimation can be decomposed into the factor ...
Xiangdong Liu, Jiahui Wu, Xianglong Li
doaj   +1 more source

Analysing interaction effects in forests using the mark correlation function

open access: yesiForest - Biogeosciences and Forestry, 2008
The spatial distribution of trees in forests can be described and modelled by point processes where the points are given by the locations (coordinates) of the trees.
Wälder K, Wälder O
doaj   +1 more source

SINGLE TREE DETECTION FROM AIRBORNE LASER SCANNING DATA USING A MARKED POINT PROCESS BASED METHOD [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
Tree detection and reconstruction is of great interest in large-scale city modelling. In this paper, we present a marked point process model to detect single trees from airborne laser scanning (ALS) data.
J. Zhang, G. Sohn, M. Brédif
doaj   +1 more source

Discrete and Continuous Operational Calculus in N-Critical Shocks Reliability Systems with Aging under Delayed Information

open access: yesMathematics, 2023
We study a reliability system subject to occasional random shocks of random magnitudes W0,W1,W2,… occurring at times τ0,τ1,τ2,…. Any such shock is harmless or critical dependent on Wk≤H or Wk>H, given a fixed threshold H.
Jewgeni H. Dshalalow, Hend Aljahani
doaj   +1 more source

Stochastic Modeling of Trees in Forest Environments

open access: yesIEEE Access, 2021
Our article deals with the detection and model generation of complex objects with curvilinear parts, like trees, with stochastic relaxation. The proposed algorithm can rely on any initial estimation of object parts as a probability map (like those ...
Karim Ben Alaya, Laszlo Czuni
doaj   +1 more source

A Bayesian Filtering Approach for Tracking Sympathetic Arousal and Cortisol-Related Energy From Marked Point Process and Continuous-Valued Observations

open access: yesIEEE Access, 2023
Multiple state variables governed by internal processes within the human body remain unobserved. On a number of occasions, these states are linked to point process bioelectric and biochemical observations coupled together with continuous-valued variables.
Dilranjan S. Wickramasuriya   +3 more
doaj   +1 more source

A method for generating stand structures using Gibbs marked point process

open access: yesSilva Fennica, 2002
Stand growth modelling based on single tree responses to their surroundings requires a description of the spatial structure of a stand. While such detailed information is rarely available from field measurements, a method to create it from more general ...
Kokkila, Tero   +2 more
doaj   +1 more source

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