检索结果-内蒙古大学图书馆

Power Electronics and Control (SEPOC), Seminar on

作者： Mirella Augusto Rodrigues Jair Urbanetz Junior Program of Post-Graduation in Energy Systems (PPGSE) Federal University of Technology of Paraná (UTFPR)

ISBN: (数字)9798350379419

ISBN: (纸本)9798350379426

Indeed, the primary source of GHG (greenhouse gas) emissions is the transport sector. Thus, an alternative to decarbonization is adopting together EVs and Renewable energy sources. By the way, a Solar Carport can obey these conditions since it integrates an EV charge station and a grid-connected PV system. Consequently, this current article presents a comparative analysis through merit indexes cited in the IEC61724 between a Solar Carport and a grid-connected PV system called EPESOL, both located in the Neoville campus of the federal university of technology of paraná (utfpr).

关键词： Seminars Visualization Renewable energy sources Rain Temperature Storms Low carbon economy Inverters Performance analysis Indexes

来源：评论

学校读者我要写书评

暂无评论

Distributed temperature sensing for special induction motor applied in harsh environment 11

Distributed temperature sensing for special induction motor ...

引用

Photonic Instrumentation Engineering XI 2024

作者： Mazzo, Paulo H.R. Torelli, Gabriel A. Dreyer, Uilian J. Pelegrin, Jessé Stel, Henrique Da Silva, Luiz C.T. Romero, Gabriel A. Morales, Rigoberto E.M. da Silva, Jean C.C. Graduate Program in Electrical and Computer Engineering Federal University of Technology UTFPR Paraná PR Curitiba Brazil Graduate Program in Energy Systems Federal University of Technology UTFPR Paraná PR Curitiba Brazil Multiphase Flow Research Center - NUEM Federal University of Technology UTFPR Paraná PR Curitiba Brazil CENPES/PDIEP EE Petrobras Brazil Federal Institute Catarinense IFC Santa Catarina Brazil

ISBN: (纸本)9781510670464

This paper presents a study and development on the thermal mapping of a Three-phase Induction Motor for harsh environments application. These machines’ exceptional performance and precise speed control make them essential equipment in multiple industrial processes, such as Artificial Lift, which integrates with a multistage centrifugal pump to elevate fluids from the reservoirs to the surface. Increased motor speeds for higher production requirements can result in temperature rise, damaging the stator winding. Employing the Raman Distributed Temperature Sensing System (RDTS), we generate a comprehensive heat distribution map of the motor. ANSYS Motor-CAD was applied for computational simulations to perform steady-state thermal analysis, giving an overview of heat transfer among internal components and thermal limits for the instrumented motor. This preliminary study presents a series of experimental tests to evaluate the advantages of fiber optic temperature sensing in harsh environments, emphasizing its significance in improving electrical machines’ performance and reliability. © 2024 SPIE.

关键词： Centrifugal pumps

来源：评论

学校读者我要写书评

暂无评论

Analyses of Photovoltaic systems Performance with Fuzzy Inference systems and Bayesian Networks

Analyses of Photovoltaic Systems Performance with Fuzzy Infe...

引用

Power Electronics and Control (SEPOC), Seminar on

作者： Nicole Polityto Cremasco Myriam Regattieri De Biase da Silva Delgado Jair Urbanetz Junior Luiz Ledo Mota Melo Jorge Assade Leludak Keiko Verônica Ono Fonseca Program of Post-Graduation of Electrical Engineering and Industrial Informatics(CPGEI) of Federal University of Technology of Paraná(UTFPR) Program of Post-Graduation of Electrical Engineering and Industrial Informatics(CPGEI) of the Federal University of Technology of Paraná(UTFPR) Program of Post-Graduation in Energy Systems of Federal University of Technology of Paraná(UTFPR Department of Electrical Engineering (DAELT)) Federal University of Technology of Paraná(UTFPR) Curitiba Brazil

Renewable energy sources have been increasingly targeted as an alternative for reducing fossil fuel emissions. This scenario requires a better understanding of energy systems' performance and limitations, notably using photovoltaic setups under diverse meteorological conditions and determining device measurement uncertainties. Accordingly, this study conducts a performance evaluation of a photovoltaic system of copper, indium, and gallium (di)selenide technology. It compares the results provided by a reference normalized equation with two interpretable artificial intelligence techniques, Fuzzy Inference System and Bayesian Networks, when temperature is also considered. In the experiments, the study found significant percentage differences between the normalization procedure and the fuzzy system on days with lower irradiation values. On the other hand, the results provided by Bayesian networks presented lower difference percentages in relation to the normalization equation values.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Evaluation of the extraction of antioxidant compounds from buriti pulp (Mauritia flexuosa L.) by response surface methodology

引用

Heliyon 2025年第2期11卷 e41926页

作者： Nogueira, Gabriela Mota Cardoso, Flávia Aparecida Reitz Perdoncini, Márcia Regina Ferreira Geraldo da Silva, Marcos Vieira Rigobello, Eliane Sloboda Department of Food Engineering and Chemical Engineering Federal University of Technology–Paraná (UTFPR) Campo Mourão 87301-005 Brazil Post-Graduation Program of Food Technology (PPGTA) Federal University of Technology–Paraná (UTFPR) Campo Mourão 87301-005 Brazil Post-Graduation Program of Technological Innovations (PPGIT) Federal University of Technology–Paraná Campo Mourão 87301-005 Brazil Instituto Federal Farroupilha Campus Alegrete Alegrete 97555-000 Brazil

Buriti is a fruit rich in antioxidant compounds, and hydroalcoholic extracts were produced from its pulp to investigate the extraction conditions that result in the highest concentrations of bioactive compounds and maximum antioxidant capacity. The results showed considerable variation in the bioactive compound contents in the pulp: total phenolics (104.64–270.61 mg GAE 100 g-1), total flavonoids (17.74–60.46 mg EC 100 g⁻¹), and total carotenoids (1.30–3.92 mg kg⁻¹). The antioxidant capacity of the extracts, evaluated by DPPH, ABTS, and FRAP methods, ranged from 1.23 to 3.47 μmol ET g⁻¹, 6.34–15.86 μmol ET g⁻¹, and 4.74–11.95 μmol ET g⁻¹, respectively, highlighting the broad diversity of antioxidant activities present in the extracts. Data modeling generated statistically significant mathematical models and contour graphs, which allowed the identification of the optimal extraction conditions for the compounds. Total carotenoids were most effectively extracted with 20 % buriti pulp, intermediate ethanol concentrations, and temperatures around 70 °C. All other bioactive compounds were more efficiently extracted with 5 % buriti pulp, intermediate ethanol concentrations, and temperatures close to 30 °C. The results confirmed the efficiency of the extractions and highlighted the excellent antioxidant potential of buriti pulp. Additionally, the analysis of the optimal regions for extracting antioxidant compounds from the pulp can be applied in future studies to optimize the extraction process, providing a solid foundation for using this fruit in industrial processes, such as the production of functional ingredients. © 2025

关键词： Antioxidants Buriti Experimental design Extraction Pulp

来源：评论

学校读者我要写书评

暂无评论

The role of online platforms to enable the process of industrial symbiosis: An analysis of tools available in the market

引用

Cleaner Production Letters 2022年 3卷

作者： Silva, Maicon Gonçalves Carvalho, Tais Soares de Castagna, Annemarlen Gehrke Strauhs, Faimara do Rocio Piekarski, Cassiano Moro Federal Technology University of Paraná Post-Graduation Program in Urban Environmental Sustainability (PPGSAU) Laboratory of Studies in Sustainable Productive Systems (LESP) Brazil Federal Technology University of Paraná Post-Graduation Program in Production Engineering (PPGEP) Laboratory of Studies in Sustainable Productive Systems (LESP) Brazil Federal Technology University of Paraná Post-Graduation Program in Urban Environmental Sustainability (PPGSAU) Brazil

The Circular Economy is driven by sustainable strategies of management and the reuse of materials and power to try to decrease the demand of resources and minimize the environmental impacts. Aligned to said perspective, the Industrial Symbiosis (IS) is opposite to the linear production's logic, enabling the sharing of resources, waste, and by-products, that is, the circular flow of power, water, materials, and information. In the last few years, to improve these IS strategies, platforms and tools were created to intermediate this process and facilitate the match between those who demand and offer waste and resources, such as the online waste markets or e-marketplaces. From this perspective, the objective of this study is to evaluate how these tools contributed to the IS process, going beyond the problem of the local factor. For this purpose, ten online platforms, found in the literature, were selected. The analysis was made based on the identification of key elements, which enabled the creation of a list with different types of traded materials, sectors and areas served, how wide was the service, the year when the activities started and, ultimately, the business model adopted. As a result, the evaluation shows that these tools enhance the symbiosis process because they approach the parties and facilitate the identification of synergies. Generally, the use of online platforms widens the geographic scope of the IS processes, enabling the interaction of parties from different places and regions. Was observed that these tools are characterized by the use of intelligent systems, based on algorithms that identify and recommend relations, providing greater assertiveness and speed to the decision-making process. Among the research's findings, we must stress that the IS potential extends much beyond the reuse of waste. There are opportunities for other synergies, such as infrastructure and service sharing. Finally, it was highlighted that, although they present many benefits

关键词： Circular economy Industrial symbiosis Online platforms Reuse of resources Sustainable strategies

来源：评论

学校读者我要写书评

暂无评论

Partial Replacement of Cassava Starch With Peruvian Maca Flour in Mortadella: Innovation in Functional Meat Products With Clean-Label Potential

引用

Journal of Food Science 2025年第6期90卷

作者： Natália da Silva Leitão Peres Leticia Cabrera Parra Bortoluzzi Flávia Aparecida Reitz Cardoso Renata Hernandez Barros Fuchs Nathália Letícia Hernandez Brito Sahra Gadia Trelha Leila Larisa Medeiros Marques Anielle de Oliveira Evandro Bona Adriana Aparecida Droval Department of Food Engineering and Chemical Engineering Federal University of Technology - Paraná (UTFPR) Campo Mourão Brazil Post-Graduation Program of Food Technology (PPGTA) Federal University of Technology - Paraná (UTFPR) Campo Mourão Brazil Post-Graduation Program of Technological Innovations (PPGIT) Federal University of Technology - Paraná Campo Mourão Brazil

This study explored the partial substitution of cassava starch with Peruvian maca flour in mortadella formulations, aiming to develop a healthier, clean-label meat product by increasing antioxidant activity and reducing synthetic additives. Formulations with varying proportions of cassava starch and maca flour were evaluated for their physicochemical properties. Significant differences were observed in pH, water-holding capacity (WHC), and color, with 100% cassava starch yielding the highest WHC and 100% maca flour producing a more intense yellow hue (higher b* value). Based on optimization, the 25% cassava starch and 75% maca flour formulation were selected for shelf-life analysis. Over 90 days, this formulation maintained stable pH (6.43 ± 0.02), WHC (90.7 ± 0.5%), and color parameters (L*, a*, b*), and lipid oxidation remained below the critical TBARS limit of 2.0 mg MDA kg −1 , demonstrating good oxidative stability (1.38 ± 0.04 mg MDA kg −1 at 90 days). Color differences (Δ E ≈ 2.5) were perceptible but did not compromise consumer acceptance. Flash profile sensory analysis found no significant differences in sensory attributes between samples with and without synthetic antioxidants. Consumer testing using a 9-point hedonic scale yielded average scores above 7.0 for appearance, flavor, and overall acceptance, indicating high acceptance. These results support using maca flour as a natural antioxidant and functional starch substitute, offering a viable strategy for cleaner-label, health-oriented meat products.

关键词： cassava starch mortadella Peruvian maca flour physicochemical properties sensory analysis

来源：评论

学校读者我要写书评

暂无评论

Alginate-Pereskia aculeata flour conjugates for the microencapsulation of Lacticaseibacillus rhamnosus GG

引用

International journal of biological macromolecules 2025年 316卷 144793页

作者： Bruna Camila Souza Lima Luana de Carvalho Matheus Henrique Nogueira Mariana Lima Braga André Ricardo Peron Dos Santos Edson Araujo de Almeida Márcia Cristina Furlaneto Regiane da Silva Gonzalez Luciana Furlaneto Maia Post-graduation Program of Food Technology Federal University of Technology Paraná 86036-370 Paraná Brazil. Post-graduation Program in Chemistry Paraná State University of Maringá 87020-900 Paraná Brazil. Department of Microbiology Paraná State University of Londrina 86051-990 Paraná Brazil. Department of Food Technology Federal University of Technology Paraná 86036-370 Paraná Brazil Post-graduation Program of Food Technology Federal University of Technology Paraná 86036-370 Paraná Brazil. Electronic address: lucianamaia@utfpr.edu.br.

Pereskia aculeata (ora-pro-nobis - OPN) has emerged among plant-based bioactive compounds due to its proven health-promoting effects. This study aimed to encapsulate Lacticaseibacillus rhamnosus GG using external ionic gelation with a composite matrix of OPN flour and sodium alginate (ALG), evaluating viability, stability, and interaction separately and together under different conditions. Encapsulated probiotics were assessed after 60 days of storage at 22 °C and 35 °C, exposure to heat treatments (55 °C, 65 °C, and 75 °C), and gastrointestinal simulation. OPN flour facilitated bacterial proliferation with a generation time of 6 h 79 min. Encapsulation efficiency exceeded 94 % for ALG and ALG/OPN microcapsules, with diameters ranging from 2 to 4 mm and 1-5 mm, respectively. Scanning electron microscopy revealed that ALG/OPN microcapsules exhibited spherical or elliptical structures with homogeneous surfaces, while ALG-only capsules displayed slight deformations. ALG/OPN microcapsules showed increased antioxidant activity (21.39 % DPPH inhibition) and excellent probiotic viability during 60 days of storage at 22 °C and 15 days at 35 °C. Under gastrointestinal simulation, ALG/OPN preserved 6.9 log CFU/g, compared to 1.0 log CFU/g for free and ALG-only capsules. This study provides the first evidence supporting using P. aculeata flour as an effective material for probiotic encapsulation.

关键词： Ionic gelation Lactobacillus rhamnosus Ora-pro-nobis Probiotic delivery Probiotic survival

来源：评论

学校读者我要写书评

暂无评论

Study of the nebulosity influence in photovoltaic system installed in the green office of utfpr

Renewable Energy and Power Quality Journal

引用

Renewable energy and Power Quality Journal 2020年 18卷 76-80页

作者： Cremasco, N.P. Leludak, J.A. Urbanetz, J. Program of Post-Graduation of Energy Systems Federal University of Technology of Paraná Campus of Curitiba Sete de Setembro Curitiba3165 Brazil Department of Electrical Engineering UTFPR Federal University of Technology of Paraná Campus of Curitiba Sete de Setembro Curitiba3165 Brazil

Since 2015, the photovoltaic solar energy has had a significant increase of its installed power in Brazil, which has great potential for the generation of electrical energy with the use of photovoltaic systems due to its high irradiation index. However, a problem for the generation of electric energy by the means of photovoltaic systems is the fact that the shadow existence impacts directly the generation, as a result of the reduction of the incident irradiance in the panels. The factors which can cause shadow effect are the external solid bodies and cloudiness, which can have its effect on photovoltaic systems increased by the cloud position in relation to the sun. Thus, this article is a study about the cloudiness influence in a photovoltaic system connected to grid, denominated Green Office of the utfpr. For that, clearness index analyses (Kt), the daily energy generation and the productivity (YIELD) have been analyzed for some different cloud conditions: clear skies, few clouds, high cloudiness, and considerable rainfall. The results showed the direct relation of the clearness index with the productivity and the electric generation of the panel, whose values were higher in the higher Kt cases. © European Association for the Development of Renewable energy, Environment and Power Quality (EA4EPQ). All rights reserved.

关键词： Clouds

来源：评论

学校读者我要写书评

暂无评论

A switched-capacitor double boost converter for a photovoltaic application 13

A switched-capacitor double boost converter for a photovolta...

引用

13th IEEE International Conference on Industry Applications, INDUSCON 2018

作者： Fey, Alice Nogueira Romaneli, Eduardo Felix Ribeiro Fernandes, Leonardo Gobel Gules, Roger DAELT-Academic Department of Electrotechnics UTFPR-Federal University of Technology-Paraná Curitiba Brazil DAELT-Academic Department of Electrotechnics PPGSE-Graduate Program in Energy Systems UTFPR-Federal University of Technology-Paraná Curitiba Brazil PPGSE-Graduate Program in Energy Systems UTFPR-Federal University of Technology-Paraná Curitiba Brazil

ISBN: (纸本)9781538679951

This paper presents a single-phase DC-DC Boost converter where the switched-capacitor technique was applied. The proposed converter has a middle point in DC-link. This characteristic allows input and output terminals to be at the same reference. DC-link presents twice the ordinary boost converter voltage. The proposed solution is suitable to Photovoltaic Grid Connected Inverters applications, operating with a NPC inverter. The converter was designed aiming a solution to the high dv/dt problems. These problems are inherent between the traditional converter and inverter structures of PV systems. A 100W operational lab model was built and tested. The experimental results are in accordance with the theoretical results. An efficiency of 96% was achieved. © 2018 IEEE.

关键词： Boost converter

来源：评论

学校读者我要写书评

暂无评论

Small-signal modeling and analysis of an isolated bidirectional battery charger 13

Small-signal modeling and analysis of an isolated bidirectio...

引用

13th IEEE International Conference on Industry Applications, INDUSCON 2018

作者： Carvalho, Edivan Laercio Carati, Emerson Da Costa, Jean Patric De Stein, Carlos Marcelo Oliveira Cardoso, Rafael Federal University of Technology - Paraná - UTFPR Pato Branco - PR Brazil Post-Graduation Program in Electrical Engineering - PPGEE Static Power Converters Engineering Research Group - ECEE Brazil

ISBN: (纸本)9781538679951

This paper presents the small-signal modeling and analysis of an isolated bidirectional DC-DC converter. The converter is implement based on two Full-Bridge converters. The system is designed to act as a charge/discharge controller for battery banks. The model for each mode of operation is developed using the average state-space model approach. To verify the models, simulations are performed using PSIM software in addition to experimental results obtained from a 200 W prototype that connects a 60 V battery bank to a 230 V DC link. © 2018 IEEE.

关键词： DC-DC converters

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：