Results 31 to 40 of about 1,601,892 (304)

Inclusion–exclusion principle for open quantum systems with bosonic bath

open access: yesNew Journal of Physics, 2021
We present two fast algorithms which apply inclusion–exclusion principle to sum over the bosonic diagrams in bare diagrammatic quantum Monte Carlo and inchworm Monte Carlo method, respectively.
Siyao Yang, Zhenning Cai, Jianfeng Lu
doaj   +1 more source

Automatic Complexity Analysis [PDF]

open access: yes, 2002
We consider the problem of automating the derivation of tight asymptotic complexity bounds for solving Horn clauses. Clearly, the solving time crucially depends on the "sparseness" of the computed relations. Therefore, our asymptotic runtime analysis is accompanied by an asymptotic sparsity calculus together with an asymptotic sparsity analysis.
Flemming Nielson   +2 more
openaire   +1 more source

Learned Signal-to-Noise Ratio Estimation in Optical Fiber Communication Links

open access: yesIEEE Photonics Journal, 2022
This paper proposes a signal-to-noise ratio (SNR) estimator based on recurrent neural network (RNN) in optical fiber communication links. The proposed estimator jointly estimates the linear and nonlinear components of the SNR.
Mohamed Al-Nahhal   +5 more
doaj   +1 more source

On the Descriptive Complexity of Color Coding

open access: yes, 2021
Color coding is an algorithmic technique used in parameterized complexity theory to detect “small” structures inside graphs. The idea is to derandomize algorithms that first randomly color a graph and then search for an easily-detectable, small color ...
Max Bannach, Till Tantau
core   +1 more source

Modified Distribution Entropy as a Complexity Measure of Heart Rate Variability (HRV) Signal

open access: yesEntropy, 2020
The complexity of a heart rate variability (HRV) signal is considered an important nonlinear feature to detect cardiac abnormalities. This work aims at explaining the physiological meaning of a recently developed complexity measurement method, namely ...
Radhagayathri Udhayakumar   +4 more
doaj   +1 more source

Complex Analysis as Catalyst [PDF]

open access: yesThe American Mathematical Monthly, 2008
We illustrate the general principle that complex analysis can be a good setting for posing problems that are best solved using techniques from other mathematical disciplines. Several examples are provided.
openaire   +3 more sources

Advanced Complex Trait Analysis [PDF]

open access: yesBioinformatics, 2012
Abstract Motivation: The Genome-wide Complex Trait Analysis (GCTA) software package can quantify the contribution of genetic variation to phenotypic variation for complex traits. However, as those datasets of interest continue to increase in size, GCTA becomes increasingly computationally prohibitive.
Alan Gray, I. Stewart, Albert Tenesa
openaire   +2 more sources

Complexity in Complex Analysis

open access: yesAdvances in Mathematics, 2002
30 pages, to appear in Advances in ...
openaire   +3 more sources

Analysis of variance: variably complex [PDF]

open access: yesClinical and Experimental Pharmacology and Physiology, 2012
Please cite this paper as: Drummond GB, Vowler SL. Analysis of variance: variably complex. Microcirculation 19: 280–283, 2012.
Gordon B, Drummond, Sarah L, Vowler
openaire   +8 more sources

Adaptive Governance and sub-national Climate Change Policy: A comparative analysis of Khyber Pukhtunkhawa and Punjab Provinces in Pakistan

open access: yes, 2019
This study explores the adaptive governance and effective implementation of climate policies at the subnational level in a developing country context. We focused on Pakistan as our central case as it is considered one of the most vulnerable countries to ...
H. Ali, Saleem, Mumtaz, Muhammad
core   +1 more source

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