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| 1 | 横向磁场直线开关磁阻电机及其控制系统(英文)显示文摘研究了基于横向磁场直线开关磁阻电机(transverse flux linear switched reluctance motor,TFLSRM)、全数字控制器与新型位置传感器的直线电机驱动系统,建立了TFLSRM数学模型。新型位置传感器利用了TFLSRM次极边极形,无需在次极安装任何元件,改善了系统可靠性。为改善系统性能,在电流环进行了从牵引力到平均电流的非线性转换,在速度环采用离散时间趋近率控制。基于DSP设计了控制器,测试了新型位置传感器与所提驱动系统的动、静态性能。实验结果验证了新型位置传感器与TFLSRM驱动系统的优良性能。 | 葛宝明 赵楠 Aníbal T.de Almeida Fernando J.T.E.Ferreira | 2007 | 中国电机工程学报2007,27,33: | 11 |
| 2 | 电力系统电流互感器饱和特性的柔性神经网络补偿法显示文摘电流互感器(CT)由于饱和使得副边电流变形,进而导致保护与测量应用中的许多问题。为此,提出一种补偿CT饱和特性的方法,以改善其测量性能。所提算法基于具有2个可变参数的sigmoid函数,构建了新型柔性神经网络,以估算CT励磁电流。实时地将估算所得励磁电流与扭曲的副边测量电流相加,即得补偿后原边电流。在学习过程中,所建补偿器的各柔性神经元柔性地改变其形状以适应各自的角色,高度柔性特点增强了网络学习能力,不但可减少网络节点数,而且可减少迭代学习时间。仿真研究中,应用一个900:5A的CT测试所提出的补偿器,测试时考虑了CT原边电流不同直流分量、CT剩磁大小与CT负载特性的影响。仿真结果验证了所提补偿方法的高精度,而且不受CT负载特性、CT剩磁情况及原边电流直流成分的影响。 | 葛宝明 Aníbal T.de Almeida Fernando J.T.E.Ferreira | 2006 | 中国电机工程学报2006,26,16: | 8 |
| 3 | Embolization of splenorenal shunt associated to portal vein thrombosis and hepatic encephalopathy显示文摘Hepatic encephalopathy(HE)is a cognitive disturbance characterized by neuropsychiatric alterations.It occurs in acute and chronic hepatic disease and also in patients with portosystemic shunts.The presence of these portosystemic shunts allows the passage of nitrogenous substances from the intestines through systemic veins without liver depuration.Therefore,the embolization of these shunts has been performed tocontrol HE manifestations,but the presence of portal vein thrombosis is considered a contraindication.In this presentation we show a cirrhotic patient with severe HE and portal vein thrombosis who was submitted to embolization of a large portosystemic shunt.Case report:a 57 years-old cirrhotic patient who had been hospitalized many times for persistent HE and hepatic coma,even without precipitant factors.She had a wide portosystemic shunt and also portal vein thrombosis.The abdominal angiography confirmed the splenorenal shunt and showed other shunts.The larger shunt was embolized through placement of microcoils,and the patient had no recurrence of overt HE.There was a little increase of esophageal and gastric varices,but no endoscopic treatment was needed.Since portosystemic shunts are frequent causes of recurrent HE in cirrhotic patients,portal vein thrombosis should be considered a relative contraindication to perform a shunt embolization.However,in particular cases with many shunts and severe HE,we found that one of these shunts can be safely embolized and this procedure can be sufficient to obtain a good HE recovery.In conclusion,we reported a case of persistent HE due to a wide portosystemic shunt associated with portal vein thrombosis.As the patient had other shunts,she was successfully treated by embolization of the larger shunt. | Letícia de Campos Franzoni Fábio Cardoso de Carvalho Rafael Gomes de Almeida Garzon Fábio da Silva Yamashiro Laís Augusti Lívia Alves Amaral Santos Mariana de Souza Dorna Júlio Pinheiro Baima Talles Bazeia Lima Carlos Antonio Caramori Giovanni Faria Silva Fernando Gomes Romeiro | 2014 | World Journal of Gastroenterology2014,20,42: | 6 |
| 4 | Duration and intensity of rainfall events with the same erosivity change sediment yield and runoff rates显示文摘The effect of different rainfall patterns on surface runoff,infiltration and thus soil losses and sediment concentrations are still in the focus of current research.In most simulated rainfall experiments,pre-cipitation is applied at a fixed intensity for a fixed time.However,the impact of rainfall patterns on soil erosion processes may be different varying the rainfall duration and intensity that produces an event with similar rainfall erosivity values.Twenty-five rainfall events were applied on micro-scale runoff plots in a soil covered with corn straw to evaluate the sediment yield and runoff rates.The different rainfall types were composed by association of duration(Dur)and intensity(IP)with the same erosivity value.The Dur varied from 38 to 106 min and the IP varied from 75.0 to 44.6 mm h^(-1).The sediment yield varied from 1.89±1.26 g m^(-2) to 4.02±2.66 g m^(-2) and runoff ranged from 16.9±8.74 mm to 32.63±10.67 mm with highest rates occurring with high intensity and low duration.The highest rainfall intensity provides the maximum sediment yield(0.138 g m^(-2) min^(-1))and runoff rates(0.87 mm min^(-1)).The time to start surface runoff varied from 14 to 19.2 min and it was longer in treatments with longer durations and low precipitation intensity.No difference was found in the amount of sediments applying rain with the same erosivity and different associations of duration and intensity.However,the intensity and duration of the rain,with the same erosivity,altered the amount and time of runoff.In rainfall experiments with con-stant intensity and fixed time,the erosion rates depend on the duration of the applied rain.Therefore,the results of this study can contribute to the development of new perspectives in the design of water erosion experiments with simulated rain considering the duration,intensity and also the association of these variables to produce rainfall that delivery the same soil erosion capacity. | Wilk Sampaio de Almeida Steffen Seitz Luiz Fernando Coutinho de Oliveira Daniel Fonseca de Carvalho | 2021 | International Soil and Water Conservation Research2021,9,1: | 4 |
| 5 | Effect of sewage sludge and sugarcane bagasse biochar on soil properties and sugar beet production显示文摘Recently, biochar has shown to be an alternative to waste disposal and a source of nutrients, acting as a soil amendment. The effects of two types of biochar on soil properties and sugar beet production as well as potential for carbon(C) sequestration were evaluated: biochar produced from sewage sludge(SB) and biochar produced from a 1:1 mixture of sewage sludge and sugarcane bagasse(MB). A greenhouse pot experiment was conducted using a sandy loam soil from the Brazilian savanna under treatments of MB applications at 2.5%, 5.0%, 7.5%, and 10.0%, SB application at 5.0%, and a conventional fertilization(CF) using lime and mineral fertilizers, with no fertilization as a control. After incubation for 45 d, seedlings were transplanted into each pot and cultivated for 55 d. Biochar characterization showed that pyrolysis reduced the biomass volume drastically, but concentrated the trace elements per unit of biochar weight. The MB treatments increased soil total C(by 27.8%) and pH(by 0.6), reduced the concentrations of nutrients, except for potassium(K), and chromium(Cr), and did not significantly alter lead(Pb) and cadmium(Cd) concentrations. Results of stable isotopes showed that all biochar treatments increased the total soil C stock and stability, suggesting a potential for application in C sequestration, and improved overall soil fertility. However, the biochar treatments also increased the concentrations of trace elements in the soil and plants. The sugar beet yields at 10.0% MB and 5.0% SB corresponded to 55%and 29% of the yield obtained in the CF treatment, respectively. These results may be due to biochar nutrients not being bioavailable when required by plants or to biochar nutrient adsorption. | Barbara Samartini Queiroz ALVES Katherin Prissila Sevilla ZELAYA Fernando COLEN Ledivan Almeida FRAZÃO Alfredo NAPOLI Sanjai J.PARIKH Luiz Arnaldo FERNANDES | 2021 | Pedosphere2021,31,4: | 4 |
| 6 | Extramedullary plasmocytoma associated with a massive deposit of amyloid in the duodenum显示文摘We report a rare case of extramedullary plasmocytoma associated with a massive deposit of amyloid in the duodenum.A 72-year-old Japanese man was admitted to our hospital presenting with a 3-mo history of epigastric pain, vomiting and weight loss.On computed tomography(CT) a wall thickening of the fourth part of the duodenum was observed.Multiple biopsies obtained from the lesion showed inflltration of plasma cells and lymphocytes, but they were not conclusive.The patient underwent resection of the lesion and, on histopathological examination, the lesion consisted of a dense and diffuse inflltrate of plasma cells and a few admixed lymphocytes with reactive follicles extending to the muscular propria.An extensive deposition of amyloid was also observed.Immunohistochemical stains revealed that a few plasmacytoid cells showed λ light chain staining, though most were κ light chain positive.These cells also were positive for CD138 and CD56 but negative for CD20 and CD79.The flndings were consistent with extramedullary plasmocytomaassociated with a massive deposit of amyloid in duodenum.A subsequent workup for multiple myeloma was completely negative.The patient showed no signs of local recurrence or dissemination of the disease after 12 mo follow-up.Because of the association of plasmocytoma and amyloidosis, the patient must be followed up because of the possible systemic involvement of the neoplasm and amyloidosis in future. | Fabiana Pirani Carneiro Maria de Nazareth Machado Sobreira Lívia Bravo Maia Alesso Cervantes Sartorelli Luiz Eduardo de Almeida Prado Franceschi Mauro Brito Brando Bárbara Wosnjuk Calaca Fernando Silva Lustosa Joo Vieira Lopes | 2009 | World Journal of Gastroenterology2009,15,28: | 2 |
| 7 | Characterization of goat whey proteins and their bioactivity and toxicity assay显示文摘Goat whey is an industry-discarded dairy by-product that has interesting nutritional value and a nutrient composition with important functional potential,where proteins have a high biological value and play an important role in the organism’s physiology.Therefore,the aim of this study was to identify,quantify,concentrate and investigate the capacity of goat whey proteins to perform different biological activities and to evaluate their acute toxicity.Concentrated proteins were quantified and identified by Bradford,Kjehdal and SDS-PAGE methods.Antibacterial activity was performed against Listeria monocytogenes,Salmonella spp.,Staphylococcus aureus,Pseudomonas aeruginosa and Escherichia coli microorganisms and showed MIC ranging from 15 to 120μg mL-1,with the highest inhibition for L.monocytogenes growth.Antiproliferative activity was performed against human malignant melanoma cells and their proliferation inhibition was up to 66.8%within 72 h of exposure.The highest antioxidant capacity was obtained at concentration 2 mg that showed 29.69%of inhibition of DPPH radical oxidation.The acute toxicity test was performed using Artemia franciscana larvae in which whey proteins were able to preserve larval survival throughout exposure.Thus,we can conclude that goat’s whey has proteins that can play a positive effect on health,with antimicrobial activity and without toxicity.The present study highlights the great potential of goat’s whey to be developed as a safe biopreservative or as a functional ingredient in the food industry. | Maria Isabel Ferreira Campos Paula Perazzo de Souza Barbosa Laura Junqueira Camargo Luciano Da Silva Pinto Bianca Mataribu Catarina Serr˜ao Luis Fernando Marques-Santos Jos´e Hon´orio Lopes Julia Mariano Caju de Oliveira Carlos Alberto de Almeida Gadelha Tatiane Santi-Gadelha | 2022 | Food Bioscience2022,46,2: | 2 |
| 8 | Supercapacitor-based Optimum Switched Reluctance Drive for Advanced Electric Vehicles显示文摘 | GE Bao-ming AHIBAL T de Almeida FERNANDO J T E Ferreira | 2003 | IEEE2003,,: | 1 |
| 9 | Modeling wine preferences by data mining from physicochemical properties显示文摘 | PAULO CORTEZ ANT6NIO CERDEIRA FERNANDO ALMEIDA TELMO MATOS JOSé REIS | | 0,,4: | 1 |
| 10 | Ultrasound-Guided Lung Recruitment in a 3-Month-Old Infant With Acute Respiratory Distress Syndrome显示文摘 | Yoshino Tamaki Sameshima Jo?o Fernando Louren?o de Almeida Murilo Marques Almeida Silva Renata Remondini Luciana Branco Haddad Miguel José Francisco Neto Marcelo Buarque de Gusm?o Funari | 2014 | Ultrasound Quarterly2014,,4: | 1 |
| 11 | Lightweight composite concrete produced with water treatment sludge and sawdust: Thermal properties and potential application显示文摘 | Almir Sales Francis Rodrigues de Souza Wilson Nunes dos Santos Alexsandro Mendes Zimer Fernando do Couto Rosa Almeida | 2010 | Construction and Building Materials2010,,12: | 1 |
| 12 | A force-impedance controlled industrial robot using an active robotic auxiliary device显示文摘 | Antonio Lopes Fernando Almeida | 2008 | Robotics and Computer- Integrated Manufacturing2008,24,3: | 1 |
| 13 | Autologous transplantation of adult adipose derived stem cells into rabbit urethral wall显示文摘 | Fernando Gon?alves Almeida Yuri Tulio Dantas Nobre Katia R. Leite Homero Bruschini | 2010 | International Urogynecology Journal2010,,6: | 1 |
| 14 | Ecoanalysis of Variable-Speed Drives for Flow Regulation in Pum- ping Systems 显示文摘 | Fernando J T E Fong J A C Almeida A T | 2011 | IEEE Transactions on Industrial E- lectronics2011,58,6: | 1 |
| 15 | Ul- trasound in Baylis-- Hillman reactions with aliphatic and aro- matic aldehydes: scope and limitations 显示文摘 | Fernando Coelho Wanda P Almeida Demetrius Veronese | 2002 | Tetrahedron2002,58,: | 1 |
| 16 | Ecoanal- ysis of Variable-Speed Drives for Flow Regulation in Pumping Systems显示文摘 | Fernando J T E Fong J A C de Almeida A T | 2011 | IEEE Transactions on Industrial Electronics2011,58,6: | 1 |
| 17 | High-performance concrete with recycled stone slurry显示文摘 | Nuno Almeida Fernando Branco Jorge de Brito José Roberto Santos | 2006 | Cement and Concrete Research2006,,2: | 1 |
| 18 | 前庭诱发的肌源性电位在单侧前庭功能低下患者中的应用显示文摘目的:分析前庭诱发的肌源性电位(VEMP)在慢性头晕患者和单侧前庭功能低下患者中的表现,明确VEMP异常和病变侧别及受累结构的关系。方法:在本观察性研究中,我们对66例受试者进行了VEMP检查(短纯音刺激,强度100dB nHL,频率1 000Hz,带通滤波10~1 500Hz,刺激率4.3Hz)。根据临床表现和冷热试验,其中33例患者被诊断为单侧前庭功能低下,另外33例受试者为年龄性别匹配的对照。分析p13-n23的振幅、不对称率、潜伏期、耳间差异和阈值。统计学分析采用t检验,Shapiro-Wilks检验和Mann-Whitney检验,P<0.05有统计学意义。结果:63.63%的慢性前庭功能低下的患者存在VEMP异常,其中13例患者VEMP异常出现在前庭功能低下侧,3例患者出现在病变对侧。5例患者双侧VEMP异常。结论:冷热试验诊断为单侧慢性前庭功能低下的患者中,63.63%存在不同程度的VEMP的改变。54.54%的患者VEMP异常出现在前庭功能低下侧,24.24%的患者的VEMP异常出现在病变对侧。VEMP能够增强对单侧前庭功能低下患者的功能评价。 | ANA PAULA SERRA RICARDO SCHAFFELN DORIGUETO ROBERTA RIBEIRO DE ALMEIDA FERNANDO FREITAS GANACA 张甦琳 孔维佳 | 2013 | 临床耳鼻咽喉头颈外科杂志2013,27,6: | 1 |
| 19 | Artificial equilibrium points and bi-impulsive maneuvers to observe 243 Ida显示文摘In the restricted three-body problem,the traditional Lagrange points L1 and L2 are the only equilibrium points near the asteroid 243 Ida.The thrust generated by a solar sail over a spacecraft enables the existence of new artificial equilibrium points,which depend on the position of the spacecraft with respect to the asteroid and the attitude of the solar sail.Such equilibrium points generate new spots to observe the body from above or below the plane of motion.Such points are very good observational locations due to their stationary condition.This work provides a preliminary analysis to observe Ida through the use of artificial equilibrium points as spots combined with transfer maneuvers between them.Such combination can be used to observe the asteroid from more different points of view in comparison to fixed ones.The analyses are made for a spacecraft equipped with a solar sail and capable of performing bi-impulsive maneuvers.The solar radiation pressure is used both to maintain the equilibrium condition and to reduce the costs of the transfers and/or to create transfers with longer duration.This is a new aspect of the present research,because it combines the continuous thrust with initial and final small impulses,which are feasible for most of the spacecraft,because the magnitudes of the impulses are very low.These combined maneuvers may reduce the transfer times of the maneuvers in most of the cases,compared with the maneuvers based only on continuous thrust.Several options involved in these transfers are shown,like to minimize the fuel spent(Dv)as a function of the transfer time or to extend the duration of the travel between the points.Extended transfer times can be useful when observations are required during the transfers. | Allan Kardec de ALMEIDA Jr Geraldo Magela Couto OLIVEIRA Antonio Fernando Bertachini de Almeida PRADO | 2021 | Chinese Journal of Aeronautics2021,34,1: | 1 |
| 20 | Transcriptional regulation of tocopherol biosynthesis in tomato显示文摘 | Leandro Quadrana Juliana Almeida Santiago N. Otaiza Tomas Duffy Junia V. Corrêa da Silva Fabiana Godoy Ramon Asís Luisa Bermúdez Alisdair R. Fernie Fernando Carrari Magdalena Rossi | 2013 | Plant Molecular Biology2013,,3: | 1 |