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Dive into the research topics where Luciane Ferreira Trierweiler is active.

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Featured researches published by Luciane Ferreira Trierweiler.


IFAC Proceedings Volumes | 2012

A New Approach for Practical Identifiability Analysis Applied to Dynamic Phenomenological Models

Viviane Rodrigues Botelho; Luciane Ferreira Trierweiler; Jorge Otávio Trierweiler

Abstract Identifiability analysis is an essential tool for parameter estimation of dynamic models. The objective of this technique is to verify which parameters of this model should be identified. This paper proposes a new methodology, based in control system theory applied to the local sensitivity analysis of the model. First, the sensitivity matrix is scaled by applying an optimization problem that minimizes the condition number of the system. Then, analyzing the NSRGA matrix of the system, the most appropriated subset of parameters to be estimated is selected. To assess the proposed methodology, a case study is presented.


Brazilian Journal of Chemical Engineering | 2013

Evaluation of wavelength selection methods for 2D fluorescence spectra applied to bioprocesses characterization

Sara Scomazzon Masiero; Jorge Otávio Trierweiler; Marcelo Farenzena; M. Escobar; Luciane Ferreira Trierweiler; Cassiano Ranzan

In biotechnological processes, the productivity and costs depend strongly on the control of the operating conditions. For this reason, sensors that allow the monitoring of variables of interest become quite important. 2D fluorescence spectroscopy is one promising option among those that are being applied for this purpose. In the present work, three methods were evaluated to select the best excitation/emission wavelength pairs of 2D fluorescence spectra to infer product, substrate and cellular concentrations throughout a fermentation using a multiple linear chemometric model: Exhaustive Search (ES), Stepwise Regression and Genetic Algorithm (GA). The Stepwise Regression presented unsatisfying results, while GA always led to good R2 values in short computational times. However, for the proposed problem, the ES showed the best performance, finding the global optimum in a few minutes.


Archive | 2011

Industrial Production of Polymeric Nanoparticles: Alternatives and Economic Analysis

Luciane Ferreira Trierweiler; Jorge Otávio Trierweiler

A number of studies in the last 20 years describe the development of several techniques to produce a great variety of nanoparticles applied as drug delivery systems, among them, the nanoprecipitation. However, no study analyzing the profitability of such systems was found in the literature. Therefore, in this work it is analyzed the profitability of a polymeric nanoproduct produced by the method of nanoprecipitation: the bezophenone-3, a sunscreen agent. Based on the laboratory procedures, 3 alternatives were proposed for the industrial production, including a static mixer and a ceramic membrane pre-filtration step. The simplified profitability analysis was done based on a methodology called Bare Module Cost. Its results showed that lowest sale prices were achieved when the particles are produced through the most simplified process and dividing the production in more batches per day. The procedure presented in this chapter is general and can be widely applied to other type of nanoparticles and processes.


Revista Eletrônica Científica da UERGS | 2017

Estudo de um consórcio de microalgas na remoção de nutrientes de efluentes de curtume

Aline de Cassia Campos Pena; Juliana Tolfo da Fontoura; Luciane Ferreira Trierweiler; Mariliz Gutterres

A microalgas se multiplicam rapidamente em aguas ricas em nutrientes ou eutrofizadas, principalmente com altas cargas de fosforo e nitrogenio. Algumas pesquisas tem buscado por especies capazes de crescer em efluentes industriais explorando as vantagens das microalgas em remover os nutrientes dos efluentes e gerar biomassa com valores agregados. O presente trabalho teve como o objetivo testar um consorcio de microalga no tratamento de efluente de curtume. Foi acompanhado o crescimento das microalgas no efluente e a remocao de nutrientes associada a este processo. O consorcio se mostrou eficiente acarretando remocoes de Nitrogenio e Fosforo de 88,61% e 92,58%, respectivamente e foi possivel isolar uma cultura unialgal do microrganismo mais representativo.


IFAC Proceedings Volumes | 2012

Fluorescence Spectroscopy as a Tool for Ethanol Fermentation On-line Monitoring

Cassiano Ranzan; Luciane Ferreira Trierweiler; Bernd Hitzmann; Jorge Otávio Trierweiler

Abstract In this work the technique of fluorescence spectroscopy was investigated as a tool to measure the main variables of interest in the production of ethanol from sugarcane juice. In order to do that, a methodology for the construction of chemometric models based on the intensities presented by excitation/emission pairs in the fluorescence spectra was proposed and tested. The results indicate that it is a promising technique, but still demanding further studies about the influence of broth composition in the spectra and how to take it into consideration in the chemometric modeling.


Chemometrics and Intelligent Laboratory Systems | 2014

Wheat flour characterization using NIR and spectral filter based on Ant Colony Optimization

Cassiano Ranzan; Axel Strohm; Lucas Ranzan; Luciane Ferreira Trierweiler; Bernd Hitzmann; Jorge Otávio Trierweiler


Chemometrics and Intelligent Laboratory Systems | 2015

NIR pre-selection data using modified changeable size moving window partial least squares and pure spectral chemometrical modeling with ant colony optimization for wheat flour characterization

Cassiano Ranzan; Luciane Ferreira Trierweiler; Bernd Hitzmann; Jorge Otávio Trierweiler


Canadian Journal of Chemical Engineering | 2016

Ethanol production from sweet potato: The effect of ripening, comparison of two heating methods, and cost analysis

Cristiane Martins Schweinberger; Tobias Romanzini Putti; Gabriela Baldin Susin; Jorge Otávio Trierweiler; Luciane Ferreira Trierweiler


Biomass & Bioenergy | 2014

Simultaneous cold hydrolysis and fermentation of fresh sweet potato.

Sara Scomazzon Masiero; Andressa Peretti; Luciane Ferreira Trierweiler; Jorge Otávio Trierweiler


IFAC-PapersOnLine | 2015

Development of Ant Colony Optimization (ACO) Algorithms Based on Statistical Analysis and Hypothesis Testing for Variable Selection

C.M. Pessoa; Cassiano Ranzan; Luciane Ferreira Trierweiler; Jorge Otávio Trierweiler

Collaboration


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Jorge Otávio Trierweiler

Universidade Federal do Rio Grande do Sul

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Cassiano Ranzan

Universidade Federal do Rio Grande do Sul

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Lucas Ranzan

Universidade Federal do Rio Grande do Sul

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Sara Scomazzon Masiero

Universidade Federal do Rio Grande do Sul

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Cristiane Martins Schweinberger

Universidade Federal do Rio Grande do Sul

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Marcelo Farenzena

Universidade Federal do Rio Grande do Sul

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Aline de Cassia Campos Pena

Universidade Federal do Rio Grande do Sul

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Andressa Peretti

Universidade Federal do Rio Grande do Sul

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C.M. Pessoa

Universidade Federal do Rio Grande do Sul

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