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Levantamento de reconhecimento dos solos do Nucleo Colonial de Gurgueia.
(Rio de Janeiro, 1969., 1969)
A novel single-phase hpf hybrid rectifier suitable for front-end trolleybus systems
(2009-12-01)
This paper proposal presents the development and the experimental analysis of a new single-phase hybrid rectifier structure with high power factor (PF) and low harmonic distortion of current (THDI), suitable for application ...
Trolleybus power system for operation with AC or DC distribution networks
(2010-09-20)
This paper presents the development and experimental analysis of a special input stage converter for a Trolleybus type vehicle allowing its operation in AC (two wires, single-phase) or DC distribution networks. The ...
Design of a high-energy drop weight rig
(Institute of Research Engineers and DoctorsABCM, 2014-06-01)
A drop weight rig, somentimes also referred to as drop hammer, is a heavy-duty testing machine to perform tests as the drop weight tearing tests (DWTT) for diverse steel materials (including plank, section bar, cast steel ...
A high efficiency HPF-ZCS-PWM Sepic for electronic ballast with multiple tubular fluorescent lamps
(2002-01-01)
This paper presents a high efficiency Sepic rectifier for an electronic ballast application with multiple fluorescent lamps. The proposed Sepic rectifier is based on a Zero-Current-Switching (ZCS) Pulse-Width-Modulated ...
Case-based system: Indexing and retrieval with fuzzy hypercube
(2001-12-01)
In some applications with case-based system, the attributes available for indexing are better described as linguistic variables instead of receiving numerical treatment. In these applications, the concept of fuzzy hypercube ...
Comparison of algorithms for loss allocation in transmission networks considering power redispatch
(2004-12-01)
An analysis of the performances of three important methods for generators and loads loss allocation is presented. The discussed methods are: based on pro-rata technique; based on the incremental technique; and based on ...
Classification of petroleum well drilling operations using Support Vector Machine (SVM)
(2007-12-01)
During the petroleum well drilling operation many mechanical and hydraulic parameters are monitored by an instrumentation system installed in the rig called a mud-logging system. These sensors, distributed in the rig, ...
A comparative study of the damping oscillation function of TCSC and UPFC
(2008-12-01)
The main objective of this work is to analyze the ability of FACTS devices like TCSC and UPFC to damp low frequency oscillations and a POD controller is also included. A comparative study of damping effect of those devices ...