Extreme climates have become frequent nowadays, causing increased heat stress in human daily life. Personal thermal management (PTM), a technology that controls the body's microenvironment, has promising strategy to address stress. While effective ordinary environments, traditional high-performance fibers, such as ultrafine, porous, highly thermally conductive, and phase change materials, fall short when dealing with harsh conditions or large temperature fluctuations. Aerogels,...

The lower limb exoskeleton technology is designed to facilitate the movement of human limbs. Significant progress has been made in this technology, which important implications for rehabilitation patients and individuals who are eager enhance their mobility. Electromyogram (EMG) signals, encompass complexity physiology, integrated into exoskeletons due deep connection predictability before begins, integration expected enable intelligent control improved human-computer interaction. This...

Abstract The gas and solid mixing in fluid catalytic cracking strippers with without internals were investigated using computational dynamics simulations. Eulerian–Eulerian two‐fluid model coupled the modified Gidaspow drag was used to simulate gas‐solid flow behavior. grid independency study comparison of 2D 3D simulations carried out first. residence time distribution axial dispersion utilized obtain parameters indicating back‐mixing degree, such as mean time, dimensionless variance Peclet...

Group Equivariant Convolution (GConv) can capture rotational equivariance from original data. It assumes uniform and strict across all features as the transformations under specific group. However, presentation or distribution of real-world data rarely conforms to equivariance, commonly referred Rotational Symmetry-Breaking (RSB) in system dataset, making GConv unable adapt effectively this phenomenon. Motivated by this, we propose a simple but highly effective method address problem, which...

In this study, we design an embedded surface EMG acquisition device to conveniently collect human signals, pursue more intelligent human–computer interactions in exoskeleton robots, and enable robots synchronize with or even respond user actions advance. The has the characteristics of low cost, miniaturization, strong compatibility, it can acquire eight-channel signals real time while retaining possibility expanding channel. This paper introduces function detail, which includes use wired...

The schematic of Separate Meter In and Out (SMISMO) Control system is introduced first, nonlinear simulation model built for SMISMO system, parameters are verified by experiment. flow rate through the valve at low pressure differential not tested in detail before, introducing extra variable area orifices to fit measured data, control can be estimated more accurately. cylinder friction indirectly experiment used improve parameters. Comparison with real has been carried out open loop test....

When rockbursts and coal gas outbursts simultaneously occur in a mine, changes adsorption (concentration of ambient methane) displacement rock must occur. The co-associated minerals reservoirs can affect the mechanical properties methane capacity, which are commonly disregarded. It is important to construct compound molecular structure models conduct dynamic simulations gain microscopic understanding underground disasters. In this work, anthracite coking coal–rock containing different...

Detection of vital signs for motional human targets in complex environment has always been a major challenge the field remote detection, healthcare and emergency rescue, because polytropic multimodal interferences make intelligent signal processing more difficult. In this paper, systematic scheme which contains preprocessing, identification, motion trajectory estimation respiratory heartbeat extraction is established. Based on CNN (Convolutional Neural Networks) model, accurate...

The drive system of an elevator controls the starting and accelerating, smooth running braking deceleration elevator.The quality elevator's performance is closely related to design system.This paper carries on modeling simulation by using AMESIM software, analyzed control under different condition such as load, parameters wire rope stiffness traction wheel rotation inertia effect.It provides a simple effective method for test dynamic with parameters.

In order to study the relationship between braking distance and load of escalator realize prediction rated with a little load, method combining theoretical analysis experimental research is used. First, dynamic characteristics during emergency are analyzed, model under different loads derived based on law conservation energy. Furthermore, influence coefficients were determined through studies, was revised, concept equivalent no-load kinetic energy (ENKE) proposed. The shows that increases...

Abstract Three-dimensional numerical simulations of transient thermal convection in a shallow molten silicon pool with Czochralski configuration (depth d = 3 mm) have been conducted to understand the transition mechanism flow patterns on melt furnaces. The crucible side wall is maintained at constant temperature. Bottom and free surfaces are either adiabatic or allow heat transfer vertical direction. simulation results indicate that two transitions occur when radial temperature difference...

The interaction between water and structure will inevitably lead to the hydrodynamic pressure, which could change dynamic behavior of wind turbine tower under earthquake action. Based on Morison theory, a simplified calculation method pressure was proposed, effects different depths seismic is investigated. main results include: in deep sensitive water, deformation energy dissipation capacity are decreased affected by pressure; influence acceleration displacement related high frequency...

The barrier layer thickness of the TNTs decrease with solution temperature rises from −10 °C to 90 °C; pulse has an evident effect on characteristics in case two fixed temperatures.

Overhead tasks are a primary inducement to work-related musculoskeletal disorders. Aiming reduce shoulder physical loads, passive exoskeletons increasingly prevalent in the industry due their lightweight, affordability, and effectiveness. However, they can only handle specific struggle balance compactness with sufficient range of motion effectively.

Objective: Shoulder exoskeletons can effectively assist with overhead work. However, their impacts on muscle synergy remain unclear. The objective is to systematically investigate the effects of shoulder exoskeleton synergies during work.Methods: Eight male participants were recruited perform a screwing task both (Intervention) and without (Normal) exoskeleton. muscles monitored extracted using non-negative matrix factorization electromyographic topographic maps. Results: number was same (n...