Online detection of blood‐spot eggs based on a novel method of spectral amplitude space conversion

2021 ◽  
Author(s):  
Zhi‐hui Zhu ◽  
Zi‐fan Ye ◽  
Kai Yang ◽  
Jun‐jie Hua
Keyword(s):  
Spectral Amplitude ◽  
Online Detection ◽  
Novel Method ◽  
Blood Spot

scholarly journals A Novel Method for Online Detection of Faults Affecting Execution-Time in Multicore-Based Systems

2017 ◽  
Vol 16 (4) ◽  
pp. 1-19 ◽  
Author(s):  
Stefano Esposito ◽  
Massimo Violante ◽  
Marco Sozzi ◽  
Marco Terrone ◽  
Massimo Traversone
Keyword(s):  
Execution Time ◽  
Online Detection ◽  
Novel Method

Fault diagnosis of rolling bearings based on improved direct fast iterative filtering and spectral amplitude modulation

2022 ◽  
pp. 095440622110556
Author(s):  
Xianyou Zhong ◽  
Quan Mei ◽  
Xiang Gao ◽  
Tianwei Huang
Keyword(s):  
Amplitude Modulation ◽  
Fitness Function ◽  
Spectral Amplitude ◽  
Rolling Bearings ◽  
Fault Features ◽  
Reconstructed Signal ◽  
Fixed Parameter ◽  
Novel Method ◽  
Iterative Filtering ◽  
Envelope Spectrum

As the transient impulse components in early fault signals are weak and easily buried by strong background noise, the fault features of rolling bearings are difficult to be extracted effectively. Focusing on this issue, a novel method based on improved direct fast iterative filtering and spectral amplitude modulation (IDFIF-SAM) is presented for detecting the early fault of rolling bearings. First, the ratio of the average crest factor of autocorrelation envelope spectrum to the average envelope entropy is taken as the fitness function to search the optimal parameters of direct fast iterative filtering (DFIF) adaptively via particle swarm optimization (PSO). Then, the efficient kurtosis entropy (EKE) index is being employed to choose the suitable components to reconstruct the signal. Finally, the reconstructed signal is subjected to spectral amplitude modulation (SAM) to strengthen the impulse features. The superiority of improved direct fast iterative filtering (IDFIF) over fixed-parameter DFIF, fast iterative filtering (FIF), and hard thresholding fast iterative filtering (HTFIF) is clarified through the simulated signal. Moreover, the comparative experimental analysis shows that the proposed IDFIF-SAM method can identify the early fault feature of rolling bearings more effectively.

ONLINE DETECTION OF THE MODALITY OF COMPLEX-VALUED REAL WORLD SIGNALS

2008 ◽  
Vol 18 (02) ◽  
pp. 67-74 ◽  
Author(s):  
DANILO P. MANDIC ◽  
PHEBE VAYANOS ◽  
MO CHEN ◽  
SU LEE GOH
Keyword(s):  
Real World ◽  
Vector Fields ◽  
Adaptive Filters ◽  
Convex Combination ◽  
Nonlinear Modeling ◽  
Complex Nature ◽  
Online Detection ◽  
Online Mode ◽  
Novel Method ◽  
Complex Valued

A novel method for the online detection of the modality of complex-valued nonlinear and nonstationary signals is introduced. This is achieved using a convex combination of complex nonlinear adaptive filters with different transient characteristics. To facilitate the online mode of operation, the convex mixing parameter λ within the proposed architecture is made gradient adaptive. Our focus is on the most important aspect of complex nonlinear modeling, that is, the identification of the split-complex and fully-complex nature of the signal in hand. The algorithms derived are robust and capable of tracking the changes in the modality of both benchmark and real world radar and wind complex vector fields.

The removal and morphology of intact biofilms from implanted venous access devices

1995 ◽  
Vol 53 ◽  
pp. 1020-1021
Author(s):  
M.A. Gregory ◽  
G.P. Hadley
Keyword(s):  
Patient Selection ◽  
Surgical Oncology ◽  
Venous Access ◽  
Common Procedure ◽  
Indwelling Catheters ◽  
Careful Patient ◽  
Novel Method ◽  
The Subject ◽  
Vascular Catheters ◽  
Venous Access Devices

The insertion of implanted venous access systems for children undergoing prolonged courses of chemotherapy has become a common procedure in pediatric surgical oncology. While not permanently implanted, the devices are expected to remain functional until cure of the primary disease is assured. Despite careful patient selection and standardised insertion and access techniques, some devices fail. The most commonly encountered problems are colonisation of the device with bacteria and catheter occlusion. Both of these difficulties relate to the development of a biofilm within the port and catheter. The morphology and evolution of biofilms in indwelling vascular catheters is the subject of ongoing investigation. To date, however, such investigations have been confined to the examination of fragments of biofilm scraped or sonicated from sections of catheter. This report describes a novel method for the extraction of intact biofilms from indwelling catheters.15 children with Wilm’s tumour and who had received venous implants were studied. Catheters were removed because of infection (n=6) or electively at the end of chemotherapy.

Longitudinal Changes in Individual BrainAGE in Healthy Aging, Mild Cognitive Impairment, and Alzheimer’s Disease

GeroPsych ◽  
2012 ◽  
Vol 25 (4) ◽  
pp. 235-245 ◽  
Author(s):  
Katja Franke ◽  
Christian Gaser
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Healthy Aging ◽  
Brain Aging ◽  
Elderly Subjects ◽  
Additional Increase ◽  
Longitudinal Changes ◽  
Novel Method ◽  
The Brain

We recently proposed a novel method that aggregates the multidimensional aging pattern across the brain to a single value. This method proved to provide stable and reliable estimates of brain aging – even across different scanners. While investigating longitudinal changes in BrainAGE in about 400 elderly subjects, we discovered that patients with Alzheimer’s disease and subjects who had converted to AD within 3 years showed accelerated brain atrophy by +6 years at baseline. An additional increase in BrainAGE accumulated to a score of about +9 years during follow-up. Accelerated brain aging was related to prospective cognitive decline and disease severity. In conclusion, the BrainAGE framework indicates discrepancies in brain aging and could thus serve as an indicator for cognitive functioning in the future.

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