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NMPC of an industrial crystallization process using model-based observers
Cedric Damour,Lionel Boillereaux,Brigitte Grondin-Perez,Jean-Pierre Chabriat,Michel Benne 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.5
This paper illustrates the benefits of a nonlinear model-based predictive control (NMPC) approach applied to an industrial crystallization process. This relevant approach proposes a setpoint tracking of the crystal mass. The controlled variable, unavailable, is obtained using an extended Luenberger observer. A neural network model is used as internal model to predict process outputs. An optimization problemis solved to compute future control actions taking into account real-time control objectives. The performances of this strategy are demonstrated via simulation in cases of setpoint tracking and disturbance rejection. The results reveal a significant improvement in terms of robustness and energy efficiency. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Cedric, Chimi Djomo,Nfornkah, Barnabas Neba,Louis-Paul-Roger, Kabelong Banoho,Kevine, Tsoupoh Kemnang Mikelle,Awazi, Nyong Princely,Forje, Gadinga Walter,Louis, Zapfack Institute of Forest Science 2022 Journal of Forest Science Vol.38 No.3
Triplochiton scleroxylon K. Schum is the plant species most affected by logging activities in the East Region of Cameroon due to its market value. This logging has impacted the ecological niche of the fern plant for which limited research has been done. The aim of this study is to contribute towards improving knowledge of fern richness and biomass on T. scleroxylon within the Central African sub-region. Fern data collection was done on 20 felled/harvested T. scleroxylon where, in addition to fern inventory, fern biomass was collected by the destructive method. The diameter and height of T. scleroxylon measured were used as explanatory variables in allometric equations for fern biomass estimation. Fern inventory was characterized using diversity index. Eight fern species were recorded on T. scleroxylon (≈5 species/T. scleroxylon). The minimum diameter where fern could be found is 59.4 cm. The average fern biomass found was 23.62 kg/T. scleroxylon. Pearson correlation coefficient showed a positive correlation (r>0.55) between fern biomass and T. scleroxylon diameter. For allometric equation, the logarithmic model improved better the adjustment than the non-logarithmic model. However, the quality of the adjustment is improved more when only the diameter is considered as an explanatory variable. Fern biomass is estimated to 90.08 kg/ha<sup>-1</sup> with 76.02 kg/ha<sup>-1</sup> being lost due to T. scleroxylon exploitation in the study area. This study is a contribution towards increasing knowledge of fern diversity specific to T. scleroxylon, and also fern biomass contribution to climate change mitigation and the potential carbon loss due to T. scleroxylon exploitation.
Cedric Boeckx 서울대학교 언어교육원 (구 서울대학교 어학연구소) 2007 語學硏究 Vol.43 No.1
In this paper I argue for a specific way to understand successive cyclic movement by showing that (i) the conceptualization of successive cyclicity I examine requires a ban on movement that is too short, and (ii) the ban required is the one that is empirically superior to recent alternative ways of defining lower bounds on movement. Empirical arguments come from the domains of applicative and psych constructions.
A Multidimensional Interdisciplinary Framework for Linguistics: The Lexicon as a Case Study
( Cedric Boeckx ),( Constantina Theofanopoulou ) 서울대학교 인지과학연구소 2014 Journal of Cognitive Science Vol.15 No.4
This paper contrasts the standard modular, uni-dimensional approach of linguistic studies with a more interdisciplinary, multi-dimensional approach, and claims that the latter has a better chance of fulfilling the cognitive objectives of the field. We sketch a research program that is intended to link the levels of the genome, connectome, dynome, cognome, and phenome, and illustrate some of the consequences of this approach by focusing on the nature of the lexicon. The shift of perspective advocated here casts doubt on the sort of primitives routinely entertained in generative circles, and favors approaches of the sort advocated among cognitive linguists. Our discussion also makes clear the need to view the linguistic enterprise as firmly rooted in our knowledge of the brain and its operations (specifically oscillations).