Quantum entanglement is one of the most puzzling and powerful concepts of quantum physics. It happens when two particles become so closely connected that whatever happens to one instantly affects the other, even if they’re separated by vast…
Category: Engineering
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A seepage calculation method in geomaterials based on the novel improved DEM-FDM
Classical seepage grid method
In the traditional seepage analysis, the discrete grid method is most widely used to solve the seepage field, i.e., the seepage area is divided into a finite number of seepage grids, and the seepage field distribution…
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Dynamic characterization and vibration response optimization of EMT system for tracked vehicles
Drive motor-planetary mechanism excitation characteristic analysis
The powertrain system for tracked vehicles studied in this paper is shown in Fig. 1, which can be divided into two parts: the generator set and the EMT system. Among them, the EMT…
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Theoretical background of the operating parameters of the satellite working mechanism of the hydraulic positive displacement machine
In satellite mechanisms the volume Vch of the chamber changes as the rotor rotates from a value of Vch−min to a value of Vch−max. These volumes are expressed by the formulae33,34:
$$\:{V}_{ch-max}=H\cdot\:{A}_{ch-max}$$
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Enhancing durability and erosion resistance of soils with varying plasticity using crosslinked biopolymers
Evaluation of erosion depth and erodibility index
As depicted in Fig. 3, the untreated or virgin soils displayed the highest depths of erosion upon being subjected to a discharge rate of 500 ml/hour for 1 h. Among the virgin soils, the…
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Autonomous modal analysis method for industrial robots considering dynamic spatial sensitivity and excitation randomness
To effectively identify structural modal parameters during multi-joint combined self-excitation motion of a robot, this paper proposes dynamic spatial sensitivity analysis and the torque projection matrix. By utilizing dynamic spatial sensitivity…
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Optimization of glutaraldehyde concentration in relation to swelling behavior of PVA-PEG-BTB film using hybrid genetic metaheuristic algorithm
Glutaraldehyde (GA) is widely employed as a crosslinking agent across numerous biomedical applications, owing to its capacity to enhance the structural integrity and stability of polymers1. Crosslinked polymers exhibit improved mechanical…
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Disturbance analysis of shield tunneling in clay and limestone composite strata using EDEM simulation
The transverse and longitudinal sections were selected as monitoring surfaces, as shown in Fig. 5. The Z-X plane 4 m away from the tunnel was set as monitoring section I, and the Y–Z plane in the center of the tunnel axis was set as…
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Optimization of energy management strategies for multi-mode hybrid electric vehicles driven by travelling road condition data
In this section, in order to test the optimization effect of ARC-EMS and the ability of the proposed MOO method to balance energy consumption and emissions, simulation and experimental bench will be used to validate the EMS described in Sect. 2.
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An adaptive reclosing scheme for flexible DC grid based on residual voltage S-transformation
To verify the reliability of the proposed method in this paper, a four-terminal flexible DC grid simulation model is built on the electromagnetic transient simulation software PSCAD/EMTDC platform, and the topology is shown in Fig. 1.
Transient…
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