Results 41 to 50 of about 485,776 (111)

Radius-SMOTE: A New Oversampling Technique of Minority Samples Based on Radius Distance for Learning From Imbalanced Data

IEEE Access, 2021
Imbalanced learning problems are a challenge faced by classifiers when data samples have an unbalanced distribution in each class. Furthermore, the synthetic oversampling method (SMOTE) is a preprocessing technique widely used to synthesize new data and ...
G. A. Pradipta, Retantyo Wardoyo, Aina Musdholifah, I. Nyoman, Hariyasa Sanjaya   +4 more
semanticscholar   +1 more source

Augmenting the Structures in a Swirling Flame via Diffusive Injection

Journal of Combustion, Volume 2014, Issue 1, 2014., 2014
Small scale experimentation using particle image velocimetry investigated the effect of the diffusive injection of methane, air, and carbon dioxide on the coherent structures in a swirling flame. The interaction between the high momentum flow region (HMFR) and central recirculation zone (CRZ) of the flame is a potential cause of combustion induced ...
Jonathan Lewis, Agustin Valera-Medina, Richard Marsh, Steven Morris, Kalyan Annamalai   +4 more
wiley   +1 more source

A measurement of the atomic hydrogen Lamb shift and the proton charge radius

Science, 2019
Unraveling the proton puzzle The discrepancy between the proton size deduced from the Lamb shift in muonic hydrogen and the average, textbook value based on regular (electronic) hydrogen has puzzled physicists for nearly a decade. One possible resolution
N. Bezginov, T. Valdez, M. Horbatsch, A. Marsman, A. Vutha, E. A. Hessels   +5 more
semanticscholar   +1 more source

Universal Relation between Instantaneous Diffusivity and Radius of Gyration of Proteins in Aqueous Solution. [PDF]

Physical Review Letters, 2020
Protein conformational fluctuations are highly complex and exhibit long-term correlations. Here, molecular dynamics simulations of small proteins demonstrate that these conformational fluctuations directly affect the protein's instantaneous diffusivity ...
Eiji Yamamoto, Takuma Akimoto, A. Mitsutake, R. Metzler   +3 more
semanticscholar   +1 more source

On Cyclic Variability in a Residual Effected HCCI Engine with Direct Gasoline Injection during Negative Valve Overlap

Mathematical Problems in Engineering, Volume 2014, Issue 1, 2014., 2014
This study contributes towards describing the nature of cycle‐by‐cycle variability in homogeneous charge compression ignition (HCCI) engines. Experimental measurements were performed using a single cylinder research engine operated in the negative valve overlap (NVO) mode and fuelled with direct gasoline injection. Both stoichiometric and lean mixtures
Jacek Hunicz, Grzegorz Litak
wiley   +1 more source

Flow Measurements Using Particle Image Velocimetry in the Ultracompact Combustor

International Journal of Aerospace Engineering, Volume 2012, Issue 1, 2012., 2012
The potential for the ultracompact combustor (UCC) lie in future research to reduced fuel consumption and improved engine performance. Velocity measurements performed on the UCC test rig at the Air Force Institute of Technology revealed flow patterns and time‐averaged turbulence statistics for data taken burning hydrogen fuel in a straight and a curved
Levi M. Thomas, Richard D. Branam, Mark F. Reeder, Roger L. Davis   +3 more
wiley   +1 more source

The nature of the radius valley [PDF]

, 2020
The existence of a Radius Valley in the Kepler size distribution stands as one of the most important observational constraints to understand the origin and composition of exoplanets with radii between that of Earth and Neptune.
J. Venturini, O. Guilera, J. Haldemann, M. P. Ronco, C. Mordasini   +4 more
semanticscholar   +1 more source

Spinodal Theory: A Common Rupturing Mechanism in Spinodal Dewetting and Surface Directed Phase Separation (Some Technological Aspects: Spatial Correlations and the Significance of Dipole‐Quadrupole Interaction in Spinodal Dewetting)

Advances in Condensed Matter Physics, Volume 2011, Issue 1, 2011., 2011
The emerging structures in spinodal dewetting of thin nano films and spinodal decomposition of binary mixtures are found to be similar with certain differences attributed to the nonlinearities inherent in the wetting forces. This paper deals with the technological aspects of the spinodal processes by giving a brief account of the theory and to ...
Satya Pal Singh, Nigel Wilding
wiley   +1 more source

Postoptimal Analysis for One Vector Venturesome Investment Problem [PDF]

, 2022
Lower and upper bounds are obtained for the stability radius of a vector venturesome investment problem with the H¨older norms in the parameter spaces. As corollaries several results are obtained for special cases.
Vadim Mychkov, Vladimir Emelichev, Yury Nikulin   +2 more
core  

Deep Imitation Learning for Optimal Trajectory Planning and Initial Condition Optimization for an Unstable Dynamic System

Advanced Intelligent Systems, Volume 6, Issue 1, January 2024.
A deep imitation learning structure is proposed for optimal trajectory planning of an unstable dynamic system. Given the system's initial conditions, the neural networks (NNs) imitate the iterative linear quadratic regulator to generate near‐optimal trajectories. Leveraging on NN gradients, optimizing the system's initial conditions, avoiding obstacles,
Bo-Hsun Chen, Pei-Chun Lin
wiley   +1 more source