Arcing
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Modelos de classificação de risco de crédito para financiamentos imobiliários: regressão logística, análise discriminante, árvores de decisão, bagging e boosting
Neste estudo foram aplicadas as técnicas paramétricas tradicionais de análise discriminante e regressão logística para análise de crédito de operações de financiamento imobiliário. Foi comparada a taxa de acertos destes métodos com as técnicas não-paramétricas baseadas em árvores de classificação, além dos métodos de meta-aprendizagem BAGG
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/08/2011
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2. Nitretação iônica sem efeito de borda :desenvolvimento e avaliação de uma nova técnica
The ionic nitriding process presents some limitations related with the control of the thickness of the layer and its uniformity. Those limitations that happen during the process, are produced due to edge effects, damage caused by arcing arc and hollow cathode, mainly in pieces with complex geometry and under pressures in excess of 1 mbar. A new technique, de
Publicado em: 2006
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3. Low energy catheter ablation of right ventricular outflow tract tachycardia.
A 38 year old woman with a structurally normal heart presented with near syncope and had right ventricular outflow tract tachycardia. She was intolerant of antiarrhythmic medication and underwent low energy catheter ablation. Six non-arcing shocks of 25 J were delivered to the right ventricular outflow tract. No further ventricular tachycardia occurred durin
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4. Human auditory evoked gamma-band magnetic fields.
We have discovered a ca. 40-Hz transient magnetic oscillatory response, evoked in the human brain by the onset of auditory stimuli, consisting of four or more cycles locked in phase to stimulus onset in approximately the 20- to 130-ms poststimulus interval. The response originates in the supratemporal auditory cortex, some millimeters deeper and anterior to
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5. Rotational excursion of heart in massive pericardial effusion studied by phased-array echocardiography.
We have observed rotational excursion, comprising anteroposterior and right to left movement of the heart, and cardiac twist around the long axis in 2 patients with massive pericardial effusion, using a phased-array echocardiograph recently developed in this country. Sagittal real-time cross-sections showed only the anteroposterior swing motion, but horizont
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6. Transvenous ablation of atrioventricular conduction with a low energy power source.
A power source modified to increase voltage delivery and minimise arcing (for a given energy) was used for transvenous ablation of atrioventricular conduction to control refractory supraventricular arrhythmias in 14 patients. Twelve had atrial fibrillation or flutter, one had atrioventricular nodal reentry tachycardia, and the other had permanent junctional