Envelope Method Of Detection
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Wheel-flat detection on trams using envelope analysis with Hilbert transform
Abstract The wheel-flat defect is one of the many issues decreasing the level of and comfort in light rail vehicles. The two main causes of wheel-flats are temporary or complete wheel blocking. The negative effect is the increase of the dynamic phenomenons in the wheel-rail interaction, which are impulsive in their nature. It could prove to be dangerous for
Lat. Am. j. solids struct.. Publicado em: 18/02/2019
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2. Modeling and FPGA-based implementation of an efficient and simple envelope detector using a Hilbert Transform FIR filter for ultrasound imaging applications
Abstract Introduction Although the envelope detection is a widely used method in medical ultrasound (US) imaging to demodulate the amplitude of the received echo signal before any back-end processing, novel hardware-based approaches have been proposed for reducing its computational cost and complexity. In this paper, we present the modeling and FPGA impleme
Res. Biomed. Eng.. Publicado em: 15/01/2018
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3. Use of Adaptive Filtering for Fault Detection on Ball Bearings / Utilização de filtros adaptativos para detecção de falhas em mancais de rolamentos
The analysis of vibrations constitutes one of the powerful tools destined for predictive maintenance. In this context, and with the objective of contributing to the improvement of the process of detection and diagnosis of ball bearing faults, the use of the technique of adaptive filtering applied to vibration signals is focused in this work, through the mini
Publicado em: 2006
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4. Utilização de wavelets no processamento de sinais EMG
This study proposes an approach to analyze EMG signals using wavelets transformed as a method of signal features extraction. The adopted methodology is based on the study of the aggregated power envelope and the aggregate power spectrum envelope, which are obtained from the distribution of energy of a certain signal, based on the potency of wavelet coefficie
Publicado em: 2006
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5. UtilizaÃÃo de filtros adaptativos para detecÃÃo de falhas em mancais de rolamentos / Use of adaptive filtering for fault detection on ball bearings
A anÃlise de vibraÃÃes constitui uma das poderosas ferramentas destinadas à manutenÃÃo preditiva. Dentro deste contexto, e com o objetivo de contribuir para a melhora do processo de detecÃÃo e diagnÃstico de falhas em mancais de rolamentos, à focado neste trabalho o uso da tÃcnica da filtragem adaptativa aplicada a sinais vibratÃrios, atravÃs da
Publicado em: 2006
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6. UtilizaÃÃo de filtros adaptativos para detecÃÃo de falhas em mancais de rolamentos / Use of Adaptive Filtering for Fault Detection on Ball Bearings
A anÃlise de vibraÃÃes constitui uma das poderosas ferramentas destinadas à manutenÃÃo preditiva. Dentro deste contexto, e com o objetivo de contribuir para a melhora do processo de detecÃÃo e diagnÃstico de falhas em mancais de rolamentos, à focado neste trabalho o uso da tÃcnica da filtragem adaptativa aplicada a sinais vibratÃrios, atravÃs da
Publicado em: 2006
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7. Molecular profile of human cytomegalovirus in bone marrow transplant recipients with active infection / Aspectos moleculares do citomegalovirus humano durante infecção ativa em pacientes submetidos ao transplante de medula ossea
Human Cytomegalovirus (HCMV) remains a significant cause of morbidity in immunocompromised patients, especially in bone marrow transplant recipients. It may manifest severe complications including hepatitis, gastrointestinal disease, and interstitial pneumonitis or as so-called ?HCMV viral syndrome? with fever, leukopenia, and thrombocytopenia. The HCMV may
Publicado em: 2006
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8. Antibody-independent detection of virus-specific glycoprotein synthesis is oncornavirus-infected cells.
A method is described for detecting the synthesis of avian and murine oncornavirus-specific glycoproteins without the use of antibodies raised against viral structural proteins. As applied to cells infected with avian tumor virus, the method served to resolve pr90, the precursor of the major envelope glycoprotein. A virus-specific glycoprotein of about 85,00
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9. Expression of the Bovine Leukemia Virus Envelope Glycoprotein (gp51) by Recombinant Baculovirus and Its Use in an Enzyme-Linked Immunosorbent Assay
The gene encoding the major envelope glycoprotein (gp51) with its signal sequence, represented by an additional NH2-terminal 33-residue amino acid sequence of bovine leukemia virus (BLV), was inserted into a baculovirus transfer vector. A recombinant virus expressing a secreted gp51 protein in insect cells was isolated. The recombinant gp51 expressed was cha
American Society for Microbiology.
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10. Cytometric detection of mycobacterial surface antigens: exposure of mannosyl epitopes and of the arabinan segment of arabinomannans.
The physical arrangement of cell envelope components leads to the exposure of selected structural motifs which in turn may influence host-parasite interactions. To gain insight into the exposed epitopes, the present study describes a flow cytometric method designed to probe defined molecules on dispersed mycobacteria. The hydrophobic fluorophore N-hexadecano
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11. Atrophic rhinitis in swine: correlation of Pasteurella multocida pathogenicity with membrane protein and lipopolysaccharide patterns.
Cell envelope proteins and lipopolysaccharides (LPS) of Pasteurella multocida strains associated with atrophic rhinitis in swine were compared by using sodium dodecyl sulfate gel electrophoresis. Among 34 strains, three different types of cell envelope protein patterns, named I (16 strains), II (3 strains), and III (15 strains), could be distinguished. These
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12. Detection of antibodies to human T-lymphotropic virus type III by using a synthetic peptide of 21 amino acid residues corresponding to a highly antigenic segment of gp41 envelope protein.
A peptide of 21 amino acids with the sequence Arg-Ile-Leu-Ala-Val-Glu-Arg-Tyr-Leu-Lys-Asp-Gln-Gln-Leu-Leu-Gly-Ile-Trp- Gly-Cys - Ser encoded by a segment in the env gene of human T-lymphotropic virus type III (HTLV-III), corresponding to amino acids 586-606 of the precursor envelope glycoprotein, has been synthesized by the Merrifield solid-phase method. Com