Sustainable supply chain management plays an important role in company's sustainability success. As the frequently emerging disruptions may harm chain's sustainable performance, managers need to design effective (SSC) resilience solution mitigate different risks. In addition, it is critical integrate customer requirements (CRs) SSC as SSC's performance highly determined by satisfaction (CS) customer-oriented market. This article proposes integrative approach achieve of solution, taking both...

Intermetallic compounds were applied widely in the fields of automotive and aerospace because its excellent shape memory effect. In this work, structural, mechanical, thermodynamic properties Ni–Ti intermetallic are studied by first-principle calculation. The results show that Ti, NiTi3, NiTi2, NiTi, Ni4Ti3, Ni3Ti, Ni4Ti, Ni stable based on Born criterion. On mechanical aspect, bulk modulus increases with rising electron density. Their ductility is ranked as follows: NiTi3 > Ni4Ti3...

Muscle Co-activation (MCo) is the simultaneous muscular activation of agonist and antagonist muscle groups, which provides adequate joint stability, movement accuracy during movement. Infant crawling an important stage motor function development that manifests non-synchronization growth upper lower limbs due to well-known gross principle head toe. However, effect MCo level for groups on has not been previously reported. In this paper, sEMG signals were collected from triceps brachii (TB)...

For the phenomenon of a hydraulic rock drill based on an underlapped reversing valve, mechanical structure overlapped form was proposed, which affected pressure pulsation impact system, and motion piston analyzed. The model built Newton’s laws. initial lead size point calculated by equilibrium position damping final velocity piston. valve designed best interval calculated, according to characteristic curves in front‐rear chamber left‐right chamber, floating feature had point. advantages were...

The magnetic velocity induction system (MAVIS) is commonly used for velocimetry in shock compression experiment. Due to some discrepancies, the variation induced voltage amplitude ambiguous, which makes simulation of this experiment particularly significant. In work, we have designed a MAVIS, was determine and flyer velocity. We built three-dimensional model MAVIS performed simulations using Analysis System Electromagnetics Suite. Additionally, experiments compared results both studies on...

Infant crawling is part of normal human gross motor development, and a 4-beat gait that involves rhythmical flexion extension limbs the underlying muscle co-activation antagonist around joint. However, detection pattern are sparse due to general difficulty measuring locomotion in infants. In this paper, sEMG muscles corresponding kinematics data were collected when infants on hands knees at their self-selected speed. The infant's developmental status was assessed by global Gross Motor...

The electronic and mechanical properties of a tetragonal Fe–N binary compound have been investigated under extreme pressure using density functional theory with the generalized gradient approximation. results formation enthalpy, phonon dispersion, elastic stability criterion show that an is stable up to 150 GPa. On one hand, Fe16N2 demonstrated by band structures states. other constants, shear, compressional modulus derived from constants impact on velocity (Vp) greatly. shear N about 14.7%...

Natural gas hydrates have huge reserves on Earth, and how to exploit them efficiently safely has been a significant issue of concern for few countries. The depressurization method is one the most promising methods achieving commercial exploitation, supplemented with different types heat input methods, it can further improve production efficiency. In this work, we innovatively employ pre-embedded heating coils direct injection fluids (gas liquid) into reservoir realistically simulate effects...

Based on the shock-loading technique of a two-stage light gas gun, yield strength copper was measured by shock wavefront disturbance method for first time. Additionally, based Steinberg–Cochran–Guinan constitutive model, numerical simulation procedure evolution perturbed front in constructed. Combining results with experimental results, found to be [Formula: see text], text] and text][Formula: text]GPa at pressures 47.17, 60.67, 76.98, 101.35 124.26[Formula: text]GPa, respectively. The were...

This study seeks to establish microforming technologies for complex-shaped micro-parts which require multi-axial flow of material. For this purpose, it is important develop new methods fabricate micro-moulds and select suitable materials processing technology microforming. 4Cr₅MoSiV₁ has been used Zr₆₅Cu₁₅Ni₁₀Al₁₀ bulk metallic glass employed in micro backward extrusion. Our research demonstrated: (1) The die mounting base...

<p style='text-indent:20px;'>In this paper, we consider the Dirichlet boundary value problem for a singularly perturbed reaction-diffusion equation with discontinuous reactive term. We use asymptotic analysis to construct formal approximation of solution internal and layers. The layer is located in vicinity curve By using sufficiently precise lower upper solutions, prove existence periodic estimate accuracy its approximation.</p>

It has been widely accepted that the central nervous system (CNS) modulates muscle synergies to simplify motion control. However, it is still unclear if there a synergistic recruitment strategy organize oscillation components of surface electromyography (sEMG) signals for limb movement. The sEMG were recorded from bilateral biceps brachii (BB) and triceps (TB) muscles during infant crawling. multivariate empirical mode decomposition (MEMD) was applied decompose multi-channel into multi-scale...

The effect of vibration on the micro-forming ability Zr55Cu30Al10Ni5 bulk metallic glass in its supercooled liquid region was studied. experiment micro-extrusion carried out under different amplitude (38 ∼ 760 N) and frequency (0.1 2.0 Hz) at a fixed temperature 723 K. extrusion length taken as measure to characterize ability. Results reveal that is effectively improved loading, increases with increasing loading amplitude, whereas dependence stronger. viscosity declines because larger free...

Taking cup-shaped part (outer diameter D and wall thickness are chosen as 2.2 mm 0.05 mm, respectively) an example, the micro-back-extrusion forming process of a Zr 55 Cu 30 Al 10 Ni 5 bulk metallic glass (BMG) in its supercooled liquid region was studied by using finite-element analysis (FEM) experiment. The effect speed on formability analyzed based extrusion load, rheological behavior material microstructure formed parts. It found that while is below than 4 μm/s, load increases obviously...

Micro-extrusion of a Zr-based bulk metallic glass in its super-cooled liquid state is explored as method to create objects cup-shaped micro-parts. The effects overall dimensions the samples and ratio inner diameter out (i) on forming are determined. results reveal that apparent viscosity increases along with rises i or decrease dimensions, increasing speed more quickly while greater than 0.833, which suggest there exists significant size effect. More generally, large i, low attributes...

Geometric similarity ratio is one of the important factors that affects disturbance amplitude shock-wave front in viscosity measurement. In this paper, Euler difference scheme two-dimensional (2D) equations viscous fluid mechanics used to simulate damping curves under different geometric ratios, and corresponding numerical solutions are shown. The samples aluminum shocked 80 GPa taken as an example. simulation results show initial conditions, material viscosity, wavelength, sample affect...