The recent development of wearable devices is revolutionizing the way human-machine interaction (HMI). Nowadays, an interactive interface that carries more embedded information desired to fulfill increasing demand in era Internet Things. However, present approach normally relies on sensor arrays for memory expansion, which inevitably brings concern wiring complexity, signal differentiation, power consumption, and miniaturization. Herein, a one-channel based self-powered HMI interface, uses...

Urinary tract infection (UTI) is responsible for a significant portion of the overall expenses health care as well mortality rates globally. We searched through available research to evaluate whether micronutrient supplements affect frequency and intensity UTI in children Papers that investigated effects vitamins D C, zinc, multiple supplementations (MMS) on incidence severity pediatric patients were pooled together. A random model was used conduct meta-analysis data. Vitamin supplementation...

This paper presents an experimental study of the dynamic performance a self-developed shear thickening fluid (STF) damper and its mechanical model was proposed by nonlinear fitting. First, STF samples with different mass fraction dispersion medium were fabricated nano fumed silica polyethylene glycol, rheological properties investigated rheometer. Second, smart developed manufactured. Its experimentally establishing vibration test bench, results indicated that can output variable damping...

The gear fault signal is characterized by strong and/or weak impulsive features and often accompanied background noise, which makes the feature extraction more difficult. Hence, this article proposes a new time-frequency analysis (TFA) method called tensor denoising (TD) assisted time-reassigned synchrosqueezing wavelet transform (TD-TSWT). First, to improve accuracy of subsequent TFA, TD based on high-order singular value decomposition (HOSVD) proposed as preprocessing technique according...

Due to the heavy background noise and strong interference, a blurry or even false time-frequency (TF) representation (TFR) by synchrosqueezing wavelet transform (SST) always results in inaccurate meaningless gear fault extractions. To solve this problem, novel TF analysis (TFA) method termed dual-core denoised SST is proposed article. The concepts critical are: 1) denoising proposed. First, measured signal transformed binary tree structure of prewhitening pseudo-characterizing signals...

Abstract This paper investigates the rheological properties of magnetorheological shear thickening fluid (MRSTF) and proposes a phenomenological theory-based constitutive model. Multiple samples with varying mass fractions particle sizes were prepared. Then, experimentally studied, including effects silicon size concentration, carbonyl iron powder concentration magnetic field on properties. Next, sedimentation stability experiment was also carried out by static observation method. Finally,...

The meaningful data-based fault diagnosis is beforehand revealing the potential faults to reduce costly breakdowns, one challenging of which extracting weak features from complicated signals. Ensemble noise-reconstructed EMD (ENEMD) an intelligent method by nice integration adaptively decomposing and naturally denoising. However, ENEMD still suffers such issues as false possible noise-only IMFs universal minimax threshold, reducing precision critical noise estimation for feature extraction....

Abstract Magnetorheological shear thickening fluid (MRSTF) is an intelligent composite material, which shows considerable potential in semi-active vibration control. However, the current research mostly limited to study of rheological properties materials, and there still a lack damper structures that can effectively utilize dual-control characteristics MRSTF. In this paper, novel structure with adaptive adjustable damping gap length proposed. Its unique design integrates internal changes...

The dimension reduction incremental harmonic balance (DRIHB) method is developed to study the dynamic behavior of dual-rotor system with multi-frequency excitations and nonlinear rubbing faults. On basis consideration an aero-engine, a model rotor built piecewise-nonlinear force used investigate system. Considering features excitation, high strong nonlinearity system, approach combined (IHB) derived for theoretically studying response fault. accuracy efficiency are proved through comparison...

In automatic visual inspection of TFT-LCD, MURA defect is difficult to recognize due uneven brightness the panel. This paper proposed a preprocessing method eliminate such unevenness using Empirical Mode Decomposition (EMD). Comparing existing algorithms, as Principal Components Analysis (PCA), this provided more integral distribution unevenness. Then grey level nonlinear transformation was original image. Besides eliminating unevenness, results indicated that EMD can further give upheaval...

In allusion to a new type of converter topology structure-Modular Multilevel Converter (MMC), in order achieve MMC grid-connected fast and accurately, deadbeat control method combined with variation SPWM technology was applied MMC. A model built MATLAB/simulink, simulations that connected grid based on had been done, its results were compared the ordinary PID controlling The comparison show dynamic performance system controlled by is better than PID, output current former can track phase...

Performance degradation assessment (PDA) is of great significance to ensure safety and availability mechanical equipment. As an important issue PDA, the robustness trained model directly affects efficiency restricts its application in practice. This paper proposes a robust modeling approach based on Student's t-hidden Markov (Student's t-HMM) nuisance attribute projection (NAP). NAP can remove attributes caused by individual differences from feature space. t-HMM utilizes finite t-mixture...

The recent development of wearable devices is revolutionizing the way human-machine interaction (HMI). Nowadays, an interactive interface that carries more embedded information desired to fulfil increasing demand in era Internet Things. However, present approach normally relies on sensor arrays for memory expansion, which inevitably brings concern wiring complexity, signal differentiation, power consumption, and miniaturization. Herein, a one-channel based self-powered HMI interface, uses...