Results 51 to 60 of about 6,830,142 (327)

Local Relativistic Exact Decoupling

open access: yes, 2012
We present a systematic hierarchy of approximations for {\it local} exact-decoupling of four-component quantum chemical Hamiltonians based on the Dirac equation.
Daoling Peng, Dyall K., Markus Reiher
core   +1 more source

Nonlinear enthalpy transformation for transient convective phase change in Smoothed Particle Hydrodynamics (SPH)

open access: yes, 2022
A three-dimensional model is presented for the prediction of solidification behavior using a nonlinear transformation of the enthalpy equation in a Smoothed Particle Hydrodynamics (SPH) discretization.
Bussmann, Markus   +2 more
core   +1 more source

On the accuracy of compressibility transformations

open access: yesPhysics of Fluids
This study highlights the importance of satisfying the eddy viscosity equivalence below the logarithmic layer, to deriving accurate compressibility transformations. First, we analyze the ability of known transformations to satisfy the eddy viscosity equivalence and show that the accuracy of these transformations is strongly dependent on this ability ...
M. Engin Danis, Paul Durbin
openaire   +2 more sources

Multi-Fault Diagnosis of Interacting Multiple Model Batteries Based on Low Inertia Noise Reduction

open access: yesIEEE Access, 2021
In view of the problems of declined estimation and diagnostic accuracy, as well as diagnosis delay caused by the fixed model transformation probability of the interacting multiple model (IMM) fault diagnosis algorithm, an IMM algorithm based on low ...
Yongchao Wang   +4 more
doaj   +1 more source

Optimization of perturbative similarity renormalization group for Hamiltonians with asymptotic freedom and bound states [PDF]

open access: yes, 2002
A model Hamiltonian that exhibits asymptotic freedom and a bound state, is used to show on example that similarity renormalization group procedure can be tuned to improve convergence of perturbative derivation of effective Hamiltonians, through ...
A. Mielke   +10 more
core   +2 more sources

Factors Influencing Measurement Accuracy of Electronic Transformers [PDF]

open access: yesProceedings of the 2015 International Symposium on Material, Energy and Environment Engineering, 2015
With the development of smart grid in our country, as the key devices of the digital metering system, the conversion accuracy and stability of electronic transformer plays a dominant role in the whole metering system error control, the stability and reliability of the electronic transformer is related to the settlement of fair trade. But as a result of
Minrui Xu   +6 more
openaire   +1 more source

Clinical Characteristics and Prognostic Risk Factors for Pediatric B‐Cell Lymphoblastic Lymphoma: A Multicenter Retrospective Cohort Study for China Net Childhood Lymphoma

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐cell lymphoblastic lymphoma (B‐LBL) represents a rare variety of non‐Hodgkin lymphoma, with limited research on its biology, progression, and management. Methods A retrospective analysis was performed on the clinical characteristics of 256 patients aged ≤18 years who received treatment under the China Net Childhood Lymphoma (CNCL)‐
Zhijuan Liu   +20 more
wiley   +1 more source

Kolmogorov-Arnold-Moser Renormalization-Group Approach to the Breakup of Invariant Tori in Hamiltonian Systems

open access: yes, 1998
We analyze the breakup of invariant tori in Hamiltonian systems with two degrees of freedom using a combination of KAM theory and renormalization-group techniques.
Chandre, C., Govin, M., Jauslin, H. R.
core   +1 more source

Predicting the Future Burden of Renal Replacement Therapy in Türkiye Using National Registry Data and Comparative Modeling Approaches

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic kidney disease is a growing public health problem worldwide, and the number of patients requiring renal replacement therapy is steadily increasing. Türkiye has experienced a similar rise in both the incidence and prevalence of renal replacement therapy over the past decades; however, national‐level projections of future ...
Arzu Akgül   +2 more
wiley   +1 more source

Pothole Detection Based on Disparity Transformation and Road Surface Modeling [PDF]

open access: yesIEEE Transactions on Image Processing, 2019
Pothole detection is one of the most important tasks for road maintenance. Computer vision approaches are generally based on either 2D road image analysis or 3D road surface modeling.
Rui Fan   +4 more
semanticscholar   +1 more source

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