Assessment of compressive strength is crucial for ensuring the safety concrete structures. However, existing works mainly focus on wet rather than fully saturated underwater and neglect influences mix parameters. To this end, study develops a testing system to measure ultrasonic waves investigates influence water-cement (W/C) ratio (ranging from 0.35 0.54), sand-aggregate (S/A) 0.57 0.87), average diameter (Da) coarse aggregate 7.5 17.44) relationships between velocities pressure (P)...

This article discusses the fuel economy optimization of a parallel hydraulic hybrid mining truck (HHMT). Considering influences various coupled factors, such as transmission system, energy management strategy, and driving conditions, on goal, this proposes use double-layer strategy with collaborative algorithm that combines particle swarm (PSO) dynamic programming (DP) to eliminate mutual effects these factors. A two-layer model is developed, powertrain parameters variables average...

A design scheme for a parallel hydraulic hybrid mining truck (HHMT) is proposed, and its energy management consumption optimisation are studied. rule-based strategy formulated, proposed the HHMT power system parameters control using orthogonal experimental (OED) with fuel economy as goal under open pit driving conditions to obtain best parameter combination. The results analysed influence law of parameters, condition changes on storage/discharge. Simulation analysis shows that actual vehicle...

Successful target discrimination using the ultra wideband (UWB) radar hinges on an accurate understanding of scattering behavior complex targets. In present study, a mathematical model UWB is developed based analysis its impulse response. Then improved matrix pencil (MP) method with adaptive selection frequency sampling interval proposed to extract centers. Simulation experiments show that method, estimated centers given are and reliable even at low signal noise ratio 6 dB.

Successful target discrimination using the ultra wideband (UWB) radar hinges on an accurate understanding of scattering behavior complex targets. In present study, a mathematical model UWB is developed based analysis its impulse response. Then improved matrix pencil (MP) method with adaptive selection frequency sampling interval employed to extract centers. Simulation experiments show that proposed method, estimated centers given are and reliable even at low signal noise ratio 6dB.

The injection of a third harmonic current can improve the electromagnetic torque output five-phase permanent magnet synchronous motor. In this paper, constant copper consumption and maximum are used as constraints, influence ratio between fundamental on under two constraints is analyzed. largest when reference value equal to ψ f 3 / times premise loss. On that constant, k w /(6 - /3) times. basis, according vector amplitude, phase action time, changing trends voltage utilization rate with V...

Background: The addition of inorganic nano dioxide (TiO2) and alumina (Al2O3) particles into the organic polymer material Polyvinylidene Fluoride (PVDF) can enhance composite membranes’ hydrophilicity anti-pollution capacity in water treatment process. Objective: study aimed to investigate thermodynamic kinetic effects nanoparticles on membrane forming Method: turbid point titration method was adopted determine casting solution phase separation system draw ternary diagrams. Ternary diagrams...

A design scheme for a parallel hydraulic hybrid mining truck (HHMT) is proposed, and its energy management consumption optimisation are studied. rule-based strategy formulated, proposed the HHMT power system parameters control using orthogonal experimental (OED) with fuel economy as goal under open pit driving conditions to obtain best parameter combination. The results analysed influence law of parameters, condition changes on storage/discharge. Simulation analysis shows that actual vehicle...