Multivariable Control
Mostrando 1-12 de 73 artigos, teses e dissertações.
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1. STATE ESTIMATION AND TRAJECTORY TRACKING CONTROL FOR A NONLINEAR AND MULTIVARIABLE BIOETHANOL PRODUCTION SYSTEM
ABSTRACT In this paper a controller is proposed based on linear algebra for a fed-batch bioethanol production process. It involves finding feed rate profiles (control actions obtained as a solution of a linear equations system) in order to make the system follow predefined concentration profiles. A neural network states estimation is designed in order to kno
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. Extremum Seeking-based Adaptive PID Control applied to Neuromuscular Electrical Stimulation
Abstract A multivariable deterministic extremum seeking (ES) is being evaluated to construct an adaptive Proportional-Integral-Derivative (PID) control law for the functional Neuromuscular Electrical Stimulation (NMES) of stroke patients. The developed scheme is applied to control the position of the patient’s arm so that movements of flexion/extension for
An. Acad. Bras. Ciênc.. Publicado em: 14/02/2019
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3. Potentially Modifiable Predictors for Renal Replacement Therapy in Patients with Cardiac Surgery Associated-Acute Kidney Injury: a Propensity Score-Matched Case-Control Study
Abstract Objective: To discover potentially modifiable perioperative predictors for renal replacement therapy (RRT) in patients with cardiac surgery-associated acute kidney injury (CSA-AKI). Methods: A cohort of 1773 consecutive cardiac surgery patients with postoperative acute kidney injury (AKI) from January 2013 to December 2015 were included retrospect
Braz. J. Cardiovasc. Surg.. Publicado em: 2019-02
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4. Carbapenem-resistant Pseudomonas aeruginosa: association with virulence genes and biofilm formation
Abstract Pseudomonas aeruginosa is an opportunistic pathogen that causes frequently nosocomial infections, currently becoming more difficult to treat due to the various resistance mechanisms and different virulence factors. The purpose of this study was to determine the risk factors independently associated with the development of bacteremia by carbapenem-re
Braz. J. Microbiol.. Publicado em: 2017-06
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5. CONTROL PROPOSAL FOR A HIGH PURITY COLUMN BASED ON THE SEPARATION OF VARIABLES BY THE INDEPENDENT COMPONENT ANALYSIS METHOD
Abstract Many industries are complex when it comes to operation mode. In order to reduce the problems related to strong coupling in these processes, the search for the incorporation of artificial intelligence devices has shown an increasing trend in recent years. Due to this complexity and control in multivariable processes, diagnosis and fault monitoring in
Braz. J. Chem. Eng.. Publicado em: 2017-01
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6. Dexmedetomidine as an Anesthetic Adjuvant in Cardiac Surgery: a Cohort Study
ABSTRACT Objective: α-2-agonists cause sympathetic inhibition combined with parasympathetic activation and have other properties that could be beneficial during cardiac anesthesia. We evaluated the effects of dexmedetomidine as an anesthetic adjuvant compared to a control group during cardiac surgery. Methods: We performed a retrospective analysis of pros
Braz. J. Cardiovasc. Surg.. Publicado em: 2016-06
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7. MULTIVARIABLE OPTIMAL CONTROL OF A HEAT EXCHANGER NETWORK WITH BYPASSES
Abstract Heat exchanger networks present an interesting control problem due to coupling among process streams. In this work, the linear quadratic regulator (LQR), a feedback optimal control technique, is used to control stream temperatures on a laboratory scale heat exchanger network, through bypass manipulation, in a multivariable system. The LQR design was
Braz. J. Chem. Eng.. Publicado em: 2016-03
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8. ADVANCED CONTROL OF A COMPLEX CHEMICAL PROCESS
Abstract Three phase catalytic hydrogenation reactors are important reactors with complex behavior due to the interaction among gas, solid and liquid phases with the kinetic, mass and heat transfer mechanisms. A nonlinear distributed parameter model was developed based on mass and energy conservation principles. It consists of balance equations for the gas a
Braz. J. Chem. Eng.. Publicado em: 2016-03
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9. Circulating levels of irisin is elevated in hypothyroidism, a case-control study
Objective Our objective in this study was to determine the relationship between irisin hormone, which has a similar effect with thyroid hormones on adipose tissue and the metabolism, and the thyroid functions and the obesity secondary to thyroid disease. Subjects and methods Seventy-four patients were included in the study, of the patients, 37 were newly
Arch. Endocrinol. Metab.. Publicado em: 21/07/2015
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10. Preoperative erectile function and the pathologic features of prostate cancer
Purpose We evaluated whether preoperative erectile function is associated with pathologic features in the patients who underwent radical prostatectomy (RP). Materials and Methods We reviewed medical records of 1,743 men who underwent RP from November 2003 through May 2012. Of these, 50 patients who had prior hormone therapy and 272 patients who had lacking
Int. braz j urol.. Publicado em: 2015-04
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11. Temperature and atmospheric pressure may be considered as predictors for the occurrence of bacillary dysentery in Guangzhou, Southern China
Introduction The control of bacillary dysentery (BD) remains a big challenge for China. Methods Negative binomial multivariable regression was used to study relationships between meteorological variables and the occurrence of BD during the period of 2006-2012. Results Each 1°C rise of temperature corresponded to an increase of 3.60% (95%CI, 3.03% to 4.
Rev. Soc. Bras. Med. Trop.. Publicado em: 2014-06
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12. Human papillomavirus infection is not related with prostatitis-related symptoms: results from a case-control study
PurposeTo investigate the relationship between human papillomavirus (HPV) infection and prostatitis-related symptoms.Materials and MethodsAll young heterosexual patients with prostatitis-related symptoms attending the same Center from January 2005 to December 2010 were eligible for this case-control study. Sexually active asymptomatic men were considered as
Int. braz j urol.. Publicado em: 2014-04