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| 1 | Automatic Detection of COVID-19 Infection Using Chest X-Ray Images Through Transfer Learning显示文摘The new coronavirus(COVID-19),declared by the World Health Organization as a pandemic,has infected more than 1 million people and killed more than 50 thousand.An infection caused by COVID-19 can develop into pneumonia,which can be detected by a chest X-ray exam and should be treated appropriately.In this work,we propose an automatic detection method for COVID-19 infection based on chest X-ray images.The datasets constructed for this study are composed of194 X-ray images of patients diagnosed with coronavirus and 194 X-ray images of healthy patients.Since few images of patients with COVID-19 are publicly available,we apply the concept of transfer learning for this task.We use different architectures of convolutional neural networks(CNNs)trained on Image Net,and adapt them to behave as feature extractors for the X-ray images.Then,the CNNs are combined with consolidated machine learning methods,such as k-Nearest Neighbor,Bayes,Random Forest,multilayer perceptron(MLP),and support vector machine(SVM).The results show that,for one of the datasets,the extractor-classifier pair with the best performance is the Mobile Net architecture with the SVM classifier using a linear kernel,which achieves an accuracy and an F1-score of 98.5%.For the other dataset,the best pair is Dense Net201 with MLP,achieving an accuracy and an F1-score of 95.6%.Thus,the proposed approach demonstrates efficiency in detecting COVID-19 in X-ray images. | Elene Firmeza Ohata Gabriel Maia Bezerra João Victor Souza das Chagas Aloísio Vieira Lira Neto Adriano Bessa Albuquerque Victor Hugo Cde Albuquerque Pedro Pedrosa Rebouças Filho | 2021 | IEEE/CAA Journal of Automatica Sinica2021，8，1： | 3 |
| 2 | Annular subvalvular left ventrieular aneurysm in Bahia, Brazil显示文摘 | Guimaraes AC Filho AS Esteves JP | 1976 | Br Heart J1976，38，： | 1 |
| 3 | Beyond appendicitis:common and uncommon gastrointestinal causes of right lower quadrant abdominal pain at multidetector CT显示文摘 | Purysko AS Remer EM Filho HM | | 0，，： | 1 |
| 4 | Results of the brazilian osteosarcoma treatment group studies and Ⅲ and Ⅳ: prognostic factors and impact on survival 显示文摘 | Petrilli AS de Camargo B Filho VO | 2006 | J Clin Oncol2006，24，7： | 1 |
| 5 | Beyond appendicitis:common and uncommon gastrointestinal causes of right lower quadrant abdominal pain at multidetector CT显示文摘 | Purysko AS Remer EM Filho HM | 2011 | Radiographics2011，31，4： | 1 |
| 6 | Closed inverted nipple treatment through a microincision procedure显示文摘 | Pereira Filho OJ Bins-Ely J Granemann AS | 2001 | Plast Reconstr Surg2001，108，4： | 1 |
| 7 | Restless legs syndrome in patients on chronic hemodialysis in a Brazilian city: frequency, biochemical findings and comorbidities显示文摘 | Goffredo Filho GS Gorini CC Purysko AS | 2003 | Arq Neuropsiquiatr2003，61，： | 1 |
| 8 | Restless legs syndrome in patients on chronic hemodialysis in a Brazilian city: Frequency, biochemical findings and comorbidities 显示文摘 | Goffredo Filho GS Gorini CC Purysko AS | 2003 | Arq Neu- ropsiquiatr2003，61，3： | 1 |
| 9 | Beyond appendicitis: common and uncommon gastrointestinal causes of right lower quadrant abdominalpain at multidetector CT显示文摘 | Purysko AS Remer EM Filho HM | 2011 | Radiographics2011，31，4： | 1 |
| 10 | Closed inverted nipple treatment through a microcision procedure显示文摘 | Pereira Filho OJ Bins-Ely J Granemann AS | 2001 | Plast Reconstr Surg2001，108，4： | 1 |
| 11 | Beyond appendicitis:common and uncommon gastrointestinal causes of right lower quadrant abdominal pain at muhidetector CT 显示文摘 | Purysko AS Remer EM Filho HM | 2011 | Radiograph- ics2011，31，4： | 1 |
| 12 | Mini-cutting technique for Khaya anthotheca: selection of suitable IBA concentration and nutrient solution for its vegetative propagation显示文摘Khaya anthotheca is a hardwood species from Africa and recently introduced to Brazil. This species yields high-quality wood for diverse applications, but little has been done toward an effective propagation method for large-scale production in nurseries. We evaluated the effects of different concentrations of macro and micronutrients(i.e., 100, 50 and 25% of the concentration of a referenced solution) combined with indole-3-butyric acid(IBA) at 0 and 2 g L^(-1) on the survival rate of mini-stumps and the survival and adventitious rooting of K. anthotheca mini-cuttings. The mini-stumps were grown from a source of seeds imported from Ghana, West Africa. The ministumps survived at a high rate(97%). Consistently high shoot yields were obtained from the mini-stumps(average of 1.8 per mini-stump). High survival percentage of minicuttings and adventitious rooting were observed when solutions with 100 and 50% of the nutrients concentration were combined with 2 g L^(-1) IBA. Histological sections analyzed through optical microscopy indicated the tissues from mini-cutting stems were juvenile, which might have stimulated adventitious rooting. These results have important implications for further work aimed at establishing propagation strategies for K. anthotheca, which are of prime importance for assisting breeding programs of this species. | Joamir Barbosa Filho Maria Angélica Di Carvalho Leandro Silva de Oliveira Enéas Ricardo Konzen Gilvano Ebling Brondani | 2018 | Journal of Forestry Research2018，29，1： | 0 |
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