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https://www.readbyqxmd.com/read/28813000/an-ameliorated-prediction-of-drug-target-interactions-based-on-multi-scale-discrete-wavelet-transform-and-network-features
#1
Cong Shen, Yijie Ding, Jijun Tang, Xinying Xu, Fei Guo
The prediction of drug-target interactions (DTIs) via computational technology plays a crucial role in reducing the experimental cost. A variety of state-of-the-art methods have been proposed to improve the accuracy of DTI predictions. In this paper, we propose a kind of drug-target interactions predictor adopting multi-scale discrete wavelet transform and network features (named as DAWN) in order to solve the DTIs prediction problem. We encode the drug molecule by a substructure fingerprint with a dictionary of substructure patterns...
August 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28811830/changes-of-blood-flux-at-bl21-and-points-along-bl-meridian-resulted-from-acupuncture-or-moxibustion-case-cross-design-study
#2
Guangjun Wang, Shuyong Jia, Hongyan Li, Ze Wang, Yuying Tian, Weibo Zhang
Acupuncture (Acup) and moxibustion (Moxi) are commonly used interventions in clinical practice. However, the difference between Acup and moxibustion mechanisms is unclear. In current study, blood perfusion responses resulted from Acup or Moxi at Weishu acupoint (BL21) and control points were explored, respectively. The time series of blood flux signals at BL21 and control points were transformed with Morlet wavelet, and the differences in each frequency interval were observed. The results suggested that acupoint response to different stimulation is a comprehensive process which related to all components of blood perfusion signals...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28807534/computed-tomography-radiomics-predicts-hpv-status-and-local-tumor-control-after-definitive-radiochemotherapy-in-head-and-neck-squamous-cell-carcinoma
#3
Marta Bogowicz, Oliver Riesterer, Kristian Ikenberg, Sonja Stieb, Holger Moch, Gabriela Studer, Matthias Guckenberger, Stephanie Tanadini-Lang
PURPOSE: This study aimed to predict local tumor control (LC) after radiochemotherapy of head and neck squamous cell carcinoma (HNSCC) and human papillomavirus (HPV) status using computed tomography (CT) radiomics. METHODS AND MATERIALS: HNSCC patients treated with definitive radiochemotherapy were included in the retrospective study approved by the local ethical commission (93 and 56 patients in the training and validation cohorts, respectively). Three hundred seventeen CT radiomic features, including those based on shape, intensity, texture, and wavelet transform, were calculated in the primary tumor region...
June 15, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28807374/design-and-application-of-discrete-wavelet-packet-transform-based-multiresolution-controller-for-liquid-level-system
#4
Rimi Paul, Anindita Sengupta
A new controller based on discrete wavelet packet transform (DWPT) for liquid level system (LLS) has been presented here. This controller generates control signal using node coefficients of the error signal which interprets many implicit phenomena such as process dynamics, measurement noise and effect of external disturbances. Through simulation results on LLS problem, this controller is shown to perform faster than both the discrete wavelet transform based controller and conventional proportional integral controller...
August 11, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28796179/design-and-implementation-of-2-45-ghz-passive-saw-temperature-sensors-with-bpsk-coded-rfid-configuration
#5
Chen Fu, Yabing Ke, Min Li, Jingting Luo, Honglang Li, Guangxing Liang, Ping Fan
A surface acoustic wave based passive temperature sensor capable of multiple access is investigated. Binary Phase Shift Keying (BPSK) codes of eight chips were implemented using a reflective delay line scheme on a Y-Z LiNbO₃ piezoelectric substrate. An accurate simulation based on the combined finite- and boundary element method (FEM/BEM) was performed in order to determine the optimum design parameters. The scaling factor 's' and time delay factor 'τ' were extracted using signal processing techniques based on the wavelet transform of the correlation function, and then evaluated at various ambient temperatures...
August 10, 2017: Sensors
https://www.readbyqxmd.com/read/28783128/evaluation-of-early-age-concrete-compressive-strength-with-ultrasonic-sensors
#6
Hyejin Yoon, Young Jin Kim, Hee Seok Kim, Jun Won Kang, Hyun-Moo Koh
Surface wave velocity measurement of concrete using ultrasonic sensors requires testing on only one side of a member. Thus, it is applicable to concrete cast inside a form and is often used to detect flaws and evaluate the compressive strength of hardened concrete. Predicting the in situ concrete strength at a very early stage inside the form helps with determining the appropriate form removal time and reducing construction time and costs. In this paper, the feasibility of using surface wave velocities to predict the strength of in situ concrete inside the form at a very early stage was evaluated...
August 7, 2017: Sensors
https://www.readbyqxmd.com/read/28778057/unsupervised-detection-and-removal-of-muscle-artifacts-from-scalp-eeg-recordings-using-canonical-correlation-analysis-wavelets-and-random-forests
#7
Maria N Anastasiadou, Manolis Christodoulakis, Eleftherios S Papathanasiou, Savvas S Papacostas, Georgios D Mitsis
OBJECTIVE: This paper proposes supervised and unsupervised algorithms for automatic muscle artifact detection and removal from long-term EEG recordings, which combine canonical correlation analysis (CCA) and wavelets with random forests (RF). METHODS: The proposed algorithms first perform CCA and continuous wavelet transform of the canonical components to generate a number of features which include component autocorrelation values and wavelet coefficient magnitude values...
July 8, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28773148/an-intelligent-gear-fault-diagnosis-methodology-using-a-complex-wavelet-enhanced-convolutional-neural-network
#8
Weifang Sun, Bin Yao, Nianyin Zeng, Binqiang Chen, Yuchao He, Xincheng Cao, Wangpeng He
As a typical example of large and complex mechanical systems, rotating machinery is prone to diversified sorts of mechanical faults. Among these faults, one of the prominent causes of malfunction is generated in gear transmission chains. Although they can be collected via vibration signals, the fault signatures are always submerged in overwhelming interfering contents. Therefore, identifying the critical fault's characteristic signal is far from an easy task. In order to improve the recognition accuracy of a fault's characteristic signal, a novel intelligent fault diagnosis method is presented...
July 12, 2017: Materials
https://www.readbyqxmd.com/read/28772929/bearing-fault-detection-based-on-empirical-wavelet-transform-and-correlated-kurtosis-by-acoustic-emission
#9
Zheyu Gao, Jing Lin, Xiufeng Wang, Xiaoqiang Xu
Rolling bearings are widely used in rotating equipment. Detection of bearing faults is of great importance to guarantee safe operation of mechanical systems. Acoustic emission (AE), as one of the bearing monitoring technologies, is sensitive to weak signals and performs well in detecting incipient faults. Therefore, AE is widely used in monitoring the operating status of rolling bearing. This paper utilizes Empirical Wavelet Transform (EWT) to decompose AE signals into mono-components adaptively followed by calculation of the correlated kurtosis (CK) at certain time intervals of these components...
May 24, 2017: Materials
https://www.readbyqxmd.com/read/28766478/novel-approach-for-the-simultaneous-determination-of-carbinoxamine-maleate-pholcodine-and-ephedrine-hydrochloride-without-interference-from-coloring-matter-in-an-antitussive-preparation-using-smart-spectrophotometric-methods
#10
Azza A Moustafa, Maha A Hegazy, Dalia Mohamed, Omnia Ali
The presence of coloring matters in syrups usually interferes with the spectrophotometric determination of active pharmaceutical ingredients. A novel approach was introduced to eliminate the interference of sunset yellow (coloring matter) in Cyrinol syrup. Smart, simple, accurate, and selective spectrophotometric methods were developed and validated for the simultaneous determination of a ternary mixture of carbinoxamine maleate, pholcodine, and ephedrine hydrochloride in syrup. Four of the applied methods used ratio spectra: successive derivative subtraction coupled with constant multiplication, successive derivative of ratio spectra, ratio subtraction coupled with ratio difference, and ratio spectra continuous wavelet transforms zero-crossing...
August 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28764870/heart-murmur-detection-based-on-wavelet-transformation-and-a-synergy-between-artificial-neural-network-and-modified-neighbor-annealing-methods
#11
Gholamhossein Eslamizadeh, Ramin Barati
Early recognition of heart disease plays a vital role in saving lives. Heart murmurs are one of the common heart problems. In this study, Artificial Neural Network (ANN) is trained with Modified Neighbor Annealing (MNA) to classify heart cycles into normal and murmur classes. Heart cycles are separated from heart sounds using wavelet transformer. The network inputs are features extracted from individual heart cycles, and two classification outputs. Classification accuracy of the proposed model is compared with five multilayer perceptron trained with Levenberg-Marquardt, Extreme-learning-machine, back-propagation, simulated-annealing, and neighbor-annealing algorithms...
May 2017: Artificial Intelligence in Medicine
https://www.readbyqxmd.com/read/28764415/sparse-dictionary-for-synthetic-transmit-aperture-medical-ultrasound-imaging
#12
Ping Wang, Jin-Yang Jiang, Na Li, Han-Wu Luo, Fang Li, Shi-Gang Cui
It is possible to recover a signal below the Nyquist sampling limit using a compressive sensing technique in ultrasound imaging. However, the reconstruction enabled by common sparse transform approaches does not achieve satisfactory results. Considering the ultrasound echo signal's features of attenuation, repetition, and superposition, a sparse dictionary with the emission pulse signal is proposed. Sparse coefficients in the proposed dictionary have high sparsity. Images reconstructed with this dictionary were compared with those obtained with the three other common transforms, namely, discrete Fourier transform, discrete cosine transform, and discrete wavelet transform...
July 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28762503/mechanomyography-based-wearable-monitor-of-quasi-isometric-muscle-fatigue-for-motor-neural-prostheses
#13
Eddy Krueger, Lana Popović-Maneski, Percy Nohama
A motor neural prosthesis based on surface functional electrical stimulation (sFES) can restore functional movement (e.g., standing, walking) in patients with a spinal cord injury (SCI). sFES generates muscle contractions in antigravity muscles and allows balance-assisted standing. This induced standing has several benefits, such as improved cardiovascular function, decreased incidence of urinary infections, reduced joint contractures, and muscle atrophy. The duration of sFES assisted standing is limited due to the quick onset of muscle fatigue...
August 1, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28758641/dropconnected-neural-networks-trained-on-time-frequency-and-inter-beat-features-for-classifying-heart-sounds
#14
Edmund Kay, Anurag Agarwal
OBJECTIVE: Automatic heart sound analysis has the potential to improve the diagnosis of valvular heart diseases in the primary care phase, as well as in countries where there is neither the expertise nor the equipment to perform echocardiograms. An algorithm has been trained, on the PhysioNet open-access heart sounds database, to classify heart sounds as normal or abnormal. APPROACH: The heart sounds are segmented using an open-source algorithm based on a hidden semi-Markov model...
July 31, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28755816/analysis-of-the-tennis-racket-vibrations-during-forehand-drives-selection-of-the-mother-wavelet
#15
Y Blache, C Hautier, F Lefebvre, A Djordjevic, T Creveaux, I Rogowski
The time-frequency analysis of the tennis racket and hand vibrations is of great interest for discomfort and pathology prevention. This study aimed to (i) to assess the stationarity of the vibratory signal of the racket and hand and (ii) to identify the best mother wavelet to perform future time-frequency analysis, (iii) to determine if the stroke spin, racket characteristics and impact zone can influence the selection of the best mother wavelet. A total of 2364 topspin and flat forehand drives were performed by fourteen male competitive tennis players with six different rackets...
July 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28753416/second-harmonic-reflection-and-transmission-from-primary-s0-mode-lamb-wave-interacting-with-a-localized-microscale-damage-in-a-plate-a-numerical-perspective
#16
Xiang Wan, Peter W Tse, Jingming Chen, Guanghua Xu, Qing Zhang
Second harmonic generation has been widely used in characterizing microstructural changes which are evenly distributed in a whole structure. However, few attention has been paid to evaluating localized micro-scale damages. In this paper, second harmonic reflection and transmission from the primary S0 mode Lamb wave interacting with a localized microstructural damage is numerically discussed. Schematic diagram for deriving fundamental temporal waveform and reconstructing the second harmonic temporal waveform based on Morlet wavelet transform is presented...
July 10, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28748112/visually-lossless-jpeg-2000-for-remote-image-browsing
#17
Han Oh, Ali Bilgin, Michael Marcellin
Image sizes have increased exponentially in recent years. The resulting high-resolution images are often viewed via remote image browsing. Zooming and panning are desirable features in this context, which result in disparate spatial regions of an image being displayed at a variety of (spatial) resolutions. When an image is displayed at a reduced resolution, the quantization step sizes needed for visually lossless quality generally increase. This paper investigates the quantization step sizes needed for visually lossless display as a function of resolution, and proposes a method that effectively incorporates the resulting (multiple) quantization step sizes into a single JPEG2000 codestream...
September 2016: Information (Basel)
https://www.readbyqxmd.com/read/28747669/compressive-sampling-based-on-frequency-saliency-for-remote-sensing-imaging
#18
Jin Li, Zilong Liu, Fengdeng Liu
In saliency-based compressive sampling (CS) for remote sensing image signals, the saliency information of images is used to allocate more sensing resources to salient regions than to non-salient regions. However, the pulsed cosine transform method can generate large errors in the calculation of saliency information because it uses only the signs of the coefficients of the discrete cosine transform for low-resolution images. In addition, the reconstructed images can exhibit blocking effects because blocks are used as the processing units in CS...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28742798/cerebrovascular-pressure-reactivity-monitoring-using-wavelet-analysis-in-traumatic-brain-injury-patients-a-retrospective-study
#19
Xiuyun Liu, Joseph Donnelly, Marek Czosnyka, Marcel J H Aries, Ken Brady, Danilo Cardim, Chiara Robba, Manuel Cabeleira, Dong-Joo Kim, Christina Haubrich, Peter J Hutchinson, Peter Smielewski
BACKGROUND: After traumatic brain injury (TBI), the ability of cerebral vessels to appropriately react to changes in arterial blood pressure (pressure reactivity) is impaired, leaving patients vulnerable to cerebral hypo- or hyperperfusion. Although, the traditional pressure reactivity index (PRx) has demonstrated that impaired pressure reactivity is associated with poor patient outcome, PRx is sometimes erratic and may not be reliable in various clinical circumstances. Here, we introduce a more robust transform-based wavelet pressure reactivity index (wPRx) and compare its performance with the widely used traditional PRx across 3 areas: its stability and reliability in time, its ability to give an optimal cerebral perfusion pressure (CPPopt) recommendation, and its relationship with patient outcome...
July 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28741115/the-dtl-erg-electrode-comes-in-different-shapes-and-sizes-are-they-all-good
#20
Jungeun Woo, Suna Jung, Mathieu Gauvin, Pierre Lachapelle
PURPOSE: Although the DTL fiber electrode has been in use in the ERG field for more than four decades, its composition was never clearly defined. We compared five different types of conductive (DTL type) yarn (differing in terms of mass, number of filaments, and crimping degree) in order to determine whether we could identify one that would be better suited for the recording of ERGs. METHODS: Photopic flash ERGs were recorded from five subjects using the following DTL electrodes: 27/7, 22/1, 11/1, 11/1*2, and 22/1*2...
July 24, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
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