Results 31 to 40 of about 680,702 (313)

Variable Selection and Parameter Tuning in High-Dimensional Prediction [PDF]

, 2010
In the context of classification using high-dimensional data such as microarray gene expression data, it is often useful to perform preliminary variable selection.
Boulesteix, Anne-Laure, Bernau, Christoph   +1 more
core   +1 more source

Analysis to Input Current Zero Crossing Distortion of Bridgeless Rectifier Operating under Different Power Factors

Energies, 2018
The principles and operating characteristics of bridgeless rectifiers under different power factors are discussed with emphasis on analyzing the input current distortion. Firstly, two driving modes are analyzed and compared.
Jinqi Liu, Yizhou Liu, Yuan Zhuang, Cong Wang   +3 more
doaj   +1 more source

Simultaneous feature selection and parameter optimisation using an artificial ant colony : case study of melting point prediction [PDF]

, 2008
We present a novel feature selection algorithm, Winnowing Artificial Ant Colony (WAAC), that performs simultaneous feature selection and model parameter optimisation for the development of predictive quantitative structure-property relationship (QSPR ...
Nigsch Florian, David S Palmer, O'Boyle, NM, Florian Nigsch, Palmer, David S, Noel M O'Boyle, Nigsch, F, Mitchell, J. B., John BO Mitchell, O'Boyle, Noel M, Mitchell, John BO, Palmer, D. S., O'Boyle, N. M., Mitchell John BO, Nigsch, Florian, Palmer David S, Mitchell, John Blayney Owen, Nigsch, F., Palmer, DS, O'Boyle Noel M   +19 more
core   +2 more sources

Intelligent Resource Allocation in LoRaWAN Using Machine Learning Techniques

IEEE Access, 2023
With the ubiquitous growth of Internet-of-things (IoT) devices, current low-power wide-area network (LPWAN) technologies will inevitably face performance degradation due to congestion and interference.
Syed Usama Minhaj, Aamir Mahmood, Sarder Fakhrul Abedin, Syed Ali Hassan, Muhammad Talha Bhatti, Syed Haider Ali, Mikael Gidlund   +6 more
doaj   +1 more source

On Adaptive Grad-Div Parameter Selection

Journal of Scientific Computing, 2022
We propose, analyze and test a new adaptive penalty scheme that picks the penalty parameter $ε$ element by element small where $\nabla\cdot u^h$ is large. We start by analyzing and testing the new scheme on the most simple but interesting setting, the Stokes problem. Finally, we extend and test the algorithm on the incompressible Navier Stokes equation
openaire   +2 more sources

Parameter Identifiability and Redundancy: Theoretical Considerations [PDF]

, 2010
Background - Models for complex biological systems may involve a large number of parameters. It may well be that some of these parameters cannot be derived from observed data via regression techniques.
Wolfgang F Heidenreich, Little, Mark, Little Mark P., Li Guangquan, Mark P. Little, Li, Guangquan, Wolfgang F. Heidenreich, Heidenreich, Wolfgang, Mark P Little, Heidenreich Wolfgang F., Guangquan Li   +10 more
core   +1 more source

Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner

Energies, 2019
Chemical species tomography enables non-invasive measurements of temperatures and concentrations in gas phase processes. In this work, we demonstrate the recently introduced linear hyperspectral absorption tomography (LHAT) on an axisymmetric counterflow
Johannes Emmert, Martina Baroncelli, Sani v.d. Kley, Heinz Pitsch, Steven Wagner   +4 more
doaj   +1 more source

An improved VSG control method for GFM converters based on backstepping control

Zhejiang dianli
In response to problems such as poor dynamic performance， slow response speed， and significant steady-state errors in conventional virtual synchronous generator （VSG） control when handling power command changes or sudden faults， this paper proposes an ...
GAO Sirui, YU Yang
doaj   +1 more source

Nonlinear Dynamic Lettuce Growth Model: Parameter Selection and Estimation for N-Limited Experiments [PDF]

, 2005
Regulations of European Commission have imposed upper limits of nitrate in lettuce due to possible health hazards for consumers. These nitrate limits create problems for growers in Northern countries.
Gutman Per-O, Ramirez Sosa Moran, M.I., Ioslovish, I.   +2 more
core   +1 more source

Assessment of Fringe Pattern Decomposition with a Cross-Correlation Index for Phase Retrieval in Fringe Projection 3D Measurements

Sensors, 2018
Phase retrieval from single frame projection fringe patterns, a fundamental and challenging problem in fringe projection measurement, attracts wide attention and various new methods have emerged to address this challenge. Many phase retrieval methods are
Xinjun Zhu, Limei Song, Hongyi Wang, Qinghua Guo   +3 more
doaj   +1 more source