Improved method of detecting bowel sounds for automatic long analysis under noisy environments

2019 ◽  
Author(s):  
Yoshiyuki Yamada ◽  
Osamu Sakata
Keyword(s):  
Improved Method ◽  
Noisy Environments ◽  
Bowel Sounds

Applied-Information Technology with Speech Enhancement Based on EMD and MF

2014 ◽  
Vol 1046 ◽  
pp. 384-387
Author(s):  
Jin Li ◽  
Kun Shen
Keyword(s):  
Information Technology ◽  
Speech Enhancement ◽  
Time Domain ◽  
Improved Method ◽  
Noisy Environments ◽  
Structuring Element ◽  
Mode Function ◽  
Mode Decomposition ◽  
Threshold Processing

Aiming at traditional methods cannot get good performance in noisy environments, an improved method for speech enhancement based on Empirical Mode Decomposition (EMD) and Morphology Filtering (MF) was proposed. The method firstly uses EMD to obtain Intrinsic Mode Function (IMF) and for hard threshold processing, then selects appropriate structuring element to construct MF for filtering processing in remaining IMFs. Finally, speech enhancement signal is reconstructed for each IMFs. Experimental results show that the proposed method for speech enhancement has better de-noising effect by comparing time-domain waveform and spectrogram. Moreover, the quality of reconstructed speech enhancement signal has been significantly improved.

An Improved Method for Pitch Detection

2014 ◽  
Vol 1049-1050 ◽  
pp. 1167-1170
Author(s):  
Jin Li ◽  
Kun Shen
Keyword(s):  
Power Spectrum ◽  
Linear Prediction ◽  
Detection Method ◽  
Pitch Detection ◽  
Improved Method ◽  
Noisy Environments ◽  
Pitch Period ◽  
Low Snr ◽  
Prediction Residual ◽  
Residual Power

Aiming at traditional methods cannot get good performance in noisy environments, an improved method for pitch detection was proposed. In this method, noisy speech was enhanced by using wiener filtering at first, and then analyzing linear prediction residual and power spectrum reprocessing, the feature of weighted residual power spectrum reprocessing was extracted to detect speech pitch period. Experimental results indicate that the proposed pitch detection method has higher reliability with lower computational complexity. It can detect pitch more accurately in low SNR environments and has better robustness.

AN IMPROVED METHOD FOR MATHEMATICAL MODELING OF THE FUNCTIONING OF AIRBORNE RADAR WEAPON CONTROL STATIONS IN THE FACE OF ACTIVE OPPOSITION TO ENEMY INTERFERENCE STATIONS

2020 ◽  
pp. 46-53
Author(s):  
О.М. Semenenko ◽  
О.А. Kablukov ◽  
А.V. Krasnik
Keyword(s):  
Mathematical Modeling ◽  
Input Data ◽  
Airborne Radar ◽  
Improved Method ◽  
Noisy Environments ◽  
Complete Evaluation ◽  
Radar Systems ◽  
Air Combat ◽  
The Face ◽  
Selection Of

The article describes an improved method for mathematical modeling of the functioning of the onboard radar in conditions of active opposition to the jammers of the enemy. The analysis of modern airborne radar systems and stations of active hindrances as objects of mathematical modeling, and existing methods of active resistance to the on-Board jammers of the enemy and methods of mathematical modeling of the functioning of the onboard radar. Generated input data for the modeling of the performance of airborne radars in noisy environments and active opposition to the jammers of the enemy, given a selected situation of air combat, which is subject to mathematical description. Were the selected indicators and criteria, characterizing efficiency of functioning of the onboard radar, the main of which is the restriction on the range of their use, depending on the applied method of resistance. Preliminary calculations regarding the application of these methods is active opposition. Given the peculiarities of application of active methods of combating enemy jamming stations, it is proposed to divide the cycle of air combat between aircraft on 5 stages, depending on the distance between them. The algorithm justify the selection of methods of countering enemy jamming stations taking into account the distance between the aircraft for continuous tracking and determined the probability of target tracking with the use of different combinations of ways of counteraction. For proper and complete evaluation of the performance of airborne radars is proposed to use fuzzy sets and the theory of games, by means of what a mathematical model of evaluating the performance of airborne radars in the conditions of active opposition to the jammers of the enemy, which was used during development of the algorithm and selecting the most efficient combination of ways to counter.

An Improved Method for the Preparation and TEM Examination of Sharp Pointed Tips used in APFIM and STM

1990 ◽  
Vol 48 (2) ◽  
pp. 102-103
Author(s):  
E.A. Fischione ◽  
P.E. Fischione ◽  
J.J. Haugh ◽  
M.G. Burke
Keyword(s):  
Atom Probe ◽  
Preparation Process ◽  
Improved Method ◽  
Ion Milling ◽  
Polishing Process ◽  
Probe Field ◽  
Scanning Tunnelling ◽  
Stm Tips ◽  
Tunnelling Microscopy ◽  
Ion Microscopy

A common requirement for both Atom Probe Field-Ion Microscopy (APFIM) and Scanning Tunnelling Microscopy (STM) is a sharp pointed tip for use as either the specimen (APFIM) or the probe (STM). Traditionally, tips have been prepared by either chemical or electropolishing techniques. Recently, ion-milling has been successfully employed in the production of APFIM tips [1]. Conventional electropolishing techniques are applicable to a wide variety of metals, but generally require careful manual adjustments during the polishing process and may also be time-consuming. In order to reduce the time and effort involved in the preparation process, a compact, self-contained polishing unit has been developed. This system is based upon the conventional two-stage electropolishing technique in which the specimen/tip blank is first locally thinned or “necked”, and subsequently electropolished until separation occurs.[2,3] The result of this process is the production of two APFIM or STM tips. A mechanized polishing unit that provides these functions while automatically maintaining alignment has been designed and developed.

Immunoelectron microscopic localization of elastic tissue in archival material using an improved method

1990 ◽  
Vol 48 (3) ◽  
pp. 794-795
Author(s):  
J. C. Fanning ◽  
J. F. White ◽  
R. Polewski ◽  
E. G. Cleary
Keyword(s):  
Normal Animal ◽  
Animal Tissue ◽  
Elastic Tissue ◽  
Human Tissues ◽  
Improved Method ◽  
Tissue Samples ◽  
Archival Material ◽  
Immuno Electron Microscopy ◽  
Arteries And Veins ◽  
Biochemical Examination

Elastic tissue is an important component of the walls of arteries and veins, of skin, of the lungs and in lesser amounts, of many other tissues. It is responsible for the rubber-like properties of the arteries and for the normal texture of young skin. It undergoes changes in a number of important diseases such as atherosclerosis and emphysema and on exposure of skin to sunlight.We have recently described methods for the localizationof elastic tissue components in normal animal and human tissues. In the study of developing and diseased tissues it is often not possible to obtain samples which have been optimally prepared for immuno-electron microscopy. Sometimes there is also a need to examine retrospectively samples collected some years previously. We have therefore developed modifications to our published methods to allow examination of human and animal tissue samples obtained at surgery or during post mortem which have subsequently been: 1. stored frozen at -35° or -70°C for biochemical examination; 2.

Intensifying Negatives–Improved Method

1895 ◽  
Vol 39 (1003supp) ◽  
pp. 16026-16027
Author(s):  
John Vansant
Keyword(s):  
Improved Method
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