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Approximation Stability and Boosting [chapter]

Wei Gao, Zhi-Hua Zhou
2010 Lecture Notes in Computer Science  
In this paper, we introduce the approximation stability and prove that approximation stability is sufficient for generalization, and sufficient and necessary for learnability of AERM in the general learning  ...  We prove that Ad-aBoost has approximation stability and thus has good generalization, and an exponential bound for AdaBoost is provided.  ...  The work was supported by the National Science Foundation of China (60635020, 60721002), the National Fundamental Research Program of China (2010CB327903) and the Jiangsu Science Foundation (BK2008018)  ... 
doi:10.1007/978-3-642-16108-7_9 fatcat:77veyplv3zhi7mpr23u7vqnd2u

Possible Application of the Phytogenic Potential as an Electric Energy Source

Mineo Itoh
2007 Transactions of the Materials Research Society of Japan  
The present paper describes how the potential value can be boosted by the use of special techniques, resulting in a successful boosted potential value of approximately 2.1 V.  ...  An electric double layer capacitor was charged with the electricity, and produced a luminescence of the light emission diode for approximately 3 minutes.  ...  ., Ltd. who was a student in Graduate School of Science and Engineering, Graduate School of Kinki University, for cooperation during the experiments. Thanks are due to Mr. T. Nishikubo and Mr. S.  ... 
doi:10.14723/tmrsj.32.1029 fatcat:q7wpahf4rjhaldcqukvgiyglbu

Effect of Circuit Parameters on Stability of Voltage-fed Buck-Boost Converter in Discontinuous Conduction Mode

Zhao-He Feng, Ren-Xi Gong, Qing-Yu Wang
2014 Journal of Electrical Engineering and Technology  
obtained, and the effect of the parameters on the system stability is deeply studied.  ...  the voltage-fed buck-boost converter operating in discontinuous conduction mode is made.  ...  The methods adopted can be approximately divided into two kinds: numerical method and approximate model analytical method.  ... 
doi:10.5370/jeet.2014.9.4.1283 fatcat:d2tzqaqclrapliueg42jc7vkoy

Non-Integer Order Approximation of a PID-Type Controller for Boost Converters

Allan G. S. Sánchez, Francisco J. Pérez-Pinal, Martín A. Rodríguez-Licea, Cornelio Posadas-Castillo
2021 Energies  
The fractional-order PID approximation achieves regulation of the output voltage in the boost converter by exhibiting the iso-damping property and using a single control loop, which confirmed its effectiveness  ...  The average linear model of the converter is obtained through small-signal approximation. The resulting average linear model is considered divided into minimum and normalized non-minimum phase parts.  ...  stage and Luis H.  ... 
doi:10.3390/en14113153 fatcat:z4vwaed6mfgjlfv36p3lxlrw2q

Model-free control of nonlinear power converters [article]

Loïc Michel, Wim Michiels, Xavier Boucher
2013 arXiv   pre-print
Our approach, which utilizes "intelligent" PI controllers, does not require any converter model identification while ensuring the stability and the robustness of the controlled system.  ...  A new "model-free" control methodology is applied to a boost power converter.  ...  Fig. 1 . 1 Boost converter. Fig. 2 . 2 Tracking and stabilization with a constant output reference.  ... 
arXiv:1310.2477v1 fatcat:uea3wvt2rzdqxnx6nyyvvdoxj4

Dynamics and control of DC-to-DC converters driving other converters downstream

Byungcho Choi, B.H. Cho, Sung-Soo Hong
1999 IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications  
The analysis and design results are verified by both time-and frequencydomain simulations. Index Terms-Distributed-power systems, dynamics of dc-to-dc converters, stability of PWM converters.  ...  This paper reveals that the dynamics of a converter loaded with other converters downstream are markedly different from those of a standalone converter and conventional design techniques developed for  ...  As for the buck case, it is essential to verify the stability and closed-loop performance, using the negative-resistance approximation for . IV.  ... 
doi:10.1109/81.795837 fatcat:42lauitrifcx3h5c4qejga47gq

Fractional-Order Approximation of PID Controller for Buck–Boost Converters

Allan G. S. Sánchez, Josué Soto-Vega, Esteban Tlelo-Cuautle, Martín Antonio Rodríguez-Licea
2021 Micromachines  
Viability of a fractional-order proportional–integral–derivative (PID) approximation to regulate voltage in buck–boost converters is investigated.  ...  The controller synthesis considers both robustness and closed-loop performance to ensure a fast and stable regulation characteristic.  ...  Acknowledgments: The authors would like to thank CONACYT México for catedras 6782, 4155 and Josué Soto-Vega's M. Sc. scholarship. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/mi12060591 pmid:34063909 fatcat:hnqlecy4r5gipicxuhud5gqtta

Nonlinear Stabilization Controller for the Boost Converter with a Constant Power Load in Both Continuous and Discontinuous Conduction Modes

Juan Gerardo Parada Salado, Carlos Alonso Herrera Ramírez, Allan Giovanni Soriano Sánchez, Martín Antonio Rodríguez Licea
2021 Micromachines  
A stability analysis based on a common-Lyapunov function is provided, and numerical and experimental tests are presented to show the proposal's effectiveness.  ...  Since the open-loop dynamics of the proposed CPL model is unstable, a nonlinear control law capable of stabilizing the boost converter regardless of the conduction mode is proposed.  ...  approximately 72% destabilizes the converter with a CPL; even worse, even if the active cycle increases again, stability cannot be recovered.  ... 
doi:10.3390/mi12050522 pmid:34066329 fatcat:433pvled5fbmrct26zk2zm5cfu

Component-wise gradient boosting and false discovery control in survival analysis with high-dimensional covariates

Kevin He, Yanming Li, Ji Zhu, Hongliang Liu, Jeffrey E. Lee, Christopher I. Amos, Terry Hyslop, Jiashun Jin, Huazhen Lin, Qinyi Wei, Yi Li
2015 Bioinformatics  
This article develops a computationally feasible method based on boosting and stability selection.  ...  Specifically, we modified the component-wise gradient boosting to improve the computational feasibility and introduced random permutation in stability selection for controlling false discoveries.  ...  Finally, the proposed boosting method with stability selection and permutation (S-Boosting-2) further reduces the FPs and it outperforms S-Boosting-1.  ... 
doi:10.1093/bioinformatics/btv517 pmid:26382192 pmcid:PMC4757968 fatcat:npuzbntxvzg3rmc6432qk4lyhe

Low-Frequency Characterization of Switched dc-dc Converters

G.W. Wester, R.D. Middlebrook
1973 IEEE Transactions on Aerospace and Electronic Systems  
Averaging techniques are developed to represent buck, boost, and buck-boost types of switched dc-dc converters by approximate continuous models.  ...  Responses from analog computer simulations of the switched and averaged power stages agree well and, in turn, confirm the analytic predictions.  ...  Analysis of continuous models which approximate the behavior of switched converters reveals several interesting characteristics, including, for boost and buck-boost power stages, the modification of effective  ... 
doi:10.1109/taes.1973.309723 fatcat:qys2e7lowrdntklqg6hjmojgey

Generating highly accurate prediction hypotheses through collaborative ensemble learning

Nino Arsov, Martin Pavlovski, Lasko Basnarkov, Ljupco Kocarev
2017 Scientific Reports  
Here we describe an effective way to fuse boosting and bagging ensembles in which algorithmic stability directs a novel process of collaboration between the resulting ensemble's weak/strong components  ...  that outperforms best-case boosting/bagging for a broad range of applications and under a variety of scenarios.  ...  Acknowledgements This work was supported by the Faculty of Computer Science and Engineering, S.s. Cyril and Methodius University, Skopje, Macedonia.  ... 
doi:10.1038/srep44649 pmid:28304378 pmcid:PMC5356335 fatcat:kymz6d7fofcnnfs3gtjwxjse5u

Flatness-Based Decentralized Adaptive Backstepping Control of Cascaded DC–DC Boost Converters Using Legendre Polynomials

Sajjad Shoja-Majidabad
2020 Journal of Control Automation and Electrical Systems  
First, a cascaded boost converter average model that covers both continuous and discontinuous conduction modes is extracted.  ...  In this paper, decentralized adaptive backstepping control of cascaded DC-DC boost converters is studied in the presence of load and voltage uncertainties and interactions between the converters.  ...  In Zhang et al. (2017) , bifurcation phenomena and stability regions of the cascaded boost converters are investigated.  ... 
doi:10.1007/s40313-020-00622-8 fatcat:ns2oyf4aq5ekvdc2s3eoakjkkq

Comparative study of controllers for switch power converters using Pspice
IJARCCE - Computer and Communication Engineering

Dr.A.R. Garg, Mrs. SwapnaManurkar
2015 IARJSET  
The converters selected for study are Buck,Boost,Buck and boost type both in VM and CM.  ...  Small signal model is prepared for all the types mentioned above and Bode's plot is drawn followed by stability analysis based on GM and PM. The software used for same purpose is Orcad capture Pspice.  ...  approximation.  ... 
doi:10.17148/iarjset.2015.2109 fatcat:mwqdos6jhrbzxp5dbzzxfiap3m

Non-contact voltage relay for switching windings of a boost transformer

E.G. Usmanov, A.N. Rasulov, M.K. Bobojanov, R.Ch. Karimov, N. Voropai, S. Senderov, A. Michalevich, H. Guliev
2019 E3S Web of Conferences  
The change of energy parameters of the proposed stabilizer depending on the voltage is given.  ...  An analytical study of a non-autonomous nonlinear dynamic circuit, which is the basis of the proposed device and the characteristics uc = f t required for switching the thruster is presented.  ...  Fig. 8 . 8 Characteristics of the dependence of cos and the coefficient of performance of the boost voltage transformer © The Authors, published by EDP Sciences.  ... 
doi:10.1051/e3sconf/201913901079 fatcat:i27hxzcvbnaodixrkkmjkz23ti

EM and component-wise boosting for Hidden Markov Models: a machine-learning approach to capture-recapture [article]

Robert William Rankin
2016 biorxiv/medrxiv   pre-print
I discuss the philosophical similarities between boosting and AIC model-selection, and show through simulations that a boosted Cormack-Jolly-Seber model often out-performs AICc methods, in terms of estimating  ...  This new boosted CMR framework is highly extensible and could provide a rich, unified framework for addressing many topics in CMR, such as non-linear effects (splines and CART-like trees), individual-heterogeneity  ...  I suggest enhancing CJSboost with stability selection to approximate Bayesian inclusion probabilities. 828 Stability Selection.  ... 
doi:10.1101/052266 fatcat:sm5uhncc5bcdfkan3gcph25b2q
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