Results 11 to 20 of about 1,745,817 (304)

Distributions of statistics on separable permutations [PDF]

open access: yesDiscrete Applied Mathematics
We derive functional equations for distributions of six classical statistics (ascents, descents, left-to-right maxima, right-to-left maxima, left-to-right minima, and right-to-left minima) on separable and irreducible separable permutations. The equations are used to find a third degree equation for joint distribution of ascents and descents on ...
Joanna N. Chen   +2 more
core   +10 more sources

Isotone Optimization in R: Pool-Adjacent-Violators Algorithm (PAVA) and Active Set Methods [PDF]

open access: yesJournal of Statistical Software, 2009
In this paper we give a general framework for isotone optimization. First we discuss a generalized version of the pool-adjacent-violators algorithm (PAVA) to minimize a separable convex function with simple chain constraints.
Jan de Leeuw, Kurt Hornik, Patrick Mair
doaj   +2 more sources

The Möbius function of separable and decomposable permutations [PDF]

open access: yes, 2011
We give a recursive formula for the Moebius function of an interval $[\sigma,\pi]$ in the poset of permutations ordered by pattern containment in the case where $\pi$ is a decomposable permutation, that is, consists of two blocks where the first one ...
Jelínek, Vít   +3 more
core   +4 more sources

Analytic Models for Separable Statistical Multiplexing [PDF]

open access: yes, 1996
We investigate a multiplexing scheme for ATM that statistically multiplexes VCs of the same service, but does not statistically multiplex across services. The scheme is implemented by allocating bandwidth to each service. In the static version, the allocations are fixed; in the dynamic version, the allocations depend on the numbers of VCs in progress ...
Keith W. Ross, Véronique Vèque
openaire   +2 more sources

Towards Separating Computational and Statistical Differential Privacy

open access: yes2023 IEEE 64th Annual Symposium on Foundations of Computer Science (FOCS), 2023
Computational differential privacy (CDP) is a natural relaxation of the standard notion of (statistical) differential privacy (SDP) proposed by Beimel, Nissim, and Omri (CRYPTO 2008) and Mironov, Pandey, Reingold, and Vadhan (CRYPTO 2009). In contrast to SDP, CDP only requires privacy guarantees to hold against computationally-bounded adversaries ...
Badih Ghazi   +4 more
openaire   +3 more sources

Convex Optimization in R

open access: yesJournal of Statistical Software, 2014
Convex optimization now plays an essential role in many facets of statistics. We briefly survey some recent developments and describe some implementations of these methods in R .
Roger Koenker, Ivan Mizera
doaj   +1 more source

A Method for Obtaining the Number of Maize Seedlings Based on the Improved YOLOv4 Lightweight Neural Network

open access: yesAgriculture, 2022
Obtaining the number of plants is the key to evaluating the effect of maize mechanical sowing, and is also a reference for subsequent statistics on the number of missing seedlings.
Jiaxin Gao, Feng Tan, Jiapeng Cui, Bo Ma
doaj   +1 more source

Distribution of density matrices at fixed purity for arbitrary dimensions

open access: yesPhysical Review Research, 2022
Uniformly sampling quantum density matrices has been demonstrated for a long time [Mezzadri, Notices AMS 54, 592 (2007), Życzkowski, J. Math. Phys. 52, 062201 (2011)0022-248810.1063/1.3595693] and is a valuable tool in the analysis and testing of quantum
Paul M. Alsing   +4 more
doaj   +1 more source

A Simple Phenology-Based Vegetation Index for Mapping Invasive Spartina Alterniflora Using Google Earth Engine

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Spartina alterniflora (S. alterniflora) after introduced to China, has rapidly expanded along the coastline and become one of the top invasive plants in coastal wetland.
Ronglong Xu, Siqing Zhao, Yinghai Ke
doaj   +1 more source

DP-YOLO: A Lightweight Real-Time Detection Algorithm for Rail Fastener Defects

open access: yesSensors
To enable accurate and efficient real-time detection of rail fastener defects under resource-constrained environments, we propose DP-YOLO, an advanced lightweight algorithm based on YOLOv5s with four key optimizations.
Lihua Chen   +3 more
doaj   +1 more source

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