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Design Framework for Context-Adaptive Control Methods Applied to Vehicle Power Management
Sudarsan Kumar Venkatesan,Rian Beck,Sorin Bengea,Joram Meskens,Bruno Depraetere 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
The paper presents a combined data-driven and model-based design framework for context-adaptive algorithms applied to the power management of a hybrid electric vehicle. Focused on this application, a set of predefined driving contexts are derived from multiple standard driving cycles. The first contribution consists of computing optimal control parameters associated with power management for each driving context. The second contribution consists of customized supervised classification algorithms for estimating driving contexts. The context-adaptive tool chain integrates context-estimation and subsequent adaptation of control parameters. Simulation results illustrate energy-efficiency benefits of the context-adaptive control method in multiple scenarios.
Synthesis of colloidal InSb nanocrystals <i>via in situ</i> activation of InCl<sub>3</sub>
Tamang, Sudarsan,Kim, Kyungnam,Choi, Hyekyoung,Kim, Youngsik,Jeong, Sohee The Royal Society of Chemistry 2015 Dalton Transactions Vol.44 No.38
<P>Indium antimonide (InSb), a narrow band gap III–V semiconductor is a promising infrared-active material for various optoelectronic applications. Synthetic challenge of colloidal InSb nanocrystals (NCs) lies in the limited choice of precursors. Only a few successful synthetic schemes involving highly toxic stibine (SbH<SUB>3</SUB>) or air- and moisture-sensitive metal silylamides (In[N(Si-(Me)<SUB>3</SUB>)<SUB>2</SUB>]<SUB>3</SUB> or Sb[N(Si-(Me)<SUB>3</SUB>)<SUB>2</SUB>]<SUB>3</SUB>) as the precursor have been reported. We found that commercially available precursors InCl<SUB>3</SUB> and Sb[NMe<SUB>2</SUB>]<SUB>3</SUB> directly form highly crystalline colloidal InSb nanocrystals in the presence of a base such as LiN(SiMe<SUB>3</SUB>)<SUB>2</SUB> or <I>n</I>BuLi. The mean size of the particles can be controlled by simply changing the activating base. This approach offers a one-pot synthesis of InSb NCs from readily available chemicals without the use of complex organometallic precursors.</P> <P>Graphic Abstract</P><P>Indium antimonide (InSb), a narrow band gap III–V semiconductor is a promising infrared-active material for various optoelectronic applications. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5dt02181b'> </P>
리쥔찬,Sudarsan Raj,윤진현,유연태,이주인,이인환 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.6
We have successfully synthesized high crystalline quality ZnOnanosheets (NSs) structures by a hydrothermal process. The detailedcharacterizations have shown that the ZnO nanostructures were wellcrystalline, uniform and had nanosheets-like morphology with anaverage size of 100-150 nm. The photocatalytic performance of ZnONSs was examined for use in the degradation of rhodamine B dye,and exhibited ~83.7% and 96.8% dye decomposition within 100 minand 140 min, respectively, under UV irradiation. The results wereattributed to the high crystalline quality of ZnO NSs that producedreactive sites over the ZnO catalyst surface to decompose therhodamine B dye.
GENERALIZED INVEXITY AND DUALITY IN MULTIOBJECTIVE NONLINEAR PROGRAMMING
Das, Laxminarayan,Nanda, Sudarsan 한국전산응용수학회 2003 Journal of applied mathematics & informatics Vol.11 No.1
The purpose of this paper is to study the duality theorems in cone constrained multiobjective nonlinear programming for pseudo-invex objectives and quasi-invex constrains and the constraint cones are arbitrary closed convex ones and not necessarily the nonnegative orthants.
An energy-efficient process planning system using machine-monitoring data: A data analytics approach
Shin, Seung-Jun,Woo, Jungyub,Rachuri, Sudarsan,Seo, Wonchul Elsevier 2019 Computer aided design Vol.110 No.-
<P><B>Abstract</B></P> <P>This paper presents a system development of incorporating Computer-Aided Process Planning (CAPP) with energy-efficient machining based on a hybrid approach to take advantage of Generative Process Planning (GPP) and Variant Process Planning (VPP) and compensate for the drawbacks of both GPP and VPP. The GPP decides process plans without human assistance through decision-making algorithms in computers but lacks in ensuring the models’ robustness for different machining conditions. The VPP adopts group technology by reusing existing plans through the identification and classification of part family but does not support predictive and optimum decision-making. The developed Energy-Efficient Process Planning System (EEPPS) builds upon data analytics to efficiently process the machine-monitoring data collected from real machine tool’s operations and to develop energy prediction and optimization models based on historical machine-monitoring data. Particularly, those energy prediction and optimization models allow process planners to anticipate the energy consumed during executing a numerical control program and optimize process parameters at the level of machining features for minimizing energy use. This paper also presents a prototype implementation to show the feasibility of the proposed EEPPS.</P>
Majhi, Sanjit Manohar,Rai, Prabhakar,Raj, Sudarsan,Chon, Bum-Soo,Park, Kyung-Kuen,Yu, Yeon-Tae American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.10
<P>In this work, Au@Cu<SUB>2</SUB>O core–shell nanoparticles (NPs) were synthesized by simple solution route and applied for CO sensing applications. Au@Cu<SUB>2</SUB>O core–shell NPs were formed by the deposition of 30–60 nm Cu<SUB>2</SUB>O shell layer on Au nanorods (NRs) having 10–15 nm width and 40–60 nm length. The morphology of Au@Cu<SUB>2</SUB>O core–shell NPs was tuned from brick to spherical shape by tuning the pH of the solution. In the absence of Au NRs, cubelike Cu<SUB>2</SUB>O NPs having ∼200 nm diameters were formed. The sensor having Au@Cu<SUB>2</SUB>O core–shell layer exhibited higher CO sensitivity compared to bare Cu<SUB>2</SUB>O NPs layer. Tuning of morphology of Au@Cu<SUB>2</SUB>O core–shell NPs from brick to spherical shape significantly lowered the air resistance. Transition from p- to n-type response was observed for all devices below 150 °C. It was demonstrated that performance of sensor depends not only on the electronic sensitization of Au NRs but also on the morphology of the Au@Cu<SUB>2</SUB>O core–shell NPs.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-10/am5008694/production/images/medium/am-2014-008694_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am5008694'>ACS Electronic Supporting Info</A></P>