Micro-actuator principle and characteristics
Micro-actuator basic structure and working principle
Yang et al.12 proposed a novel fragmented thrombolytic micro-actuator with asymmetric grooves at the tip of a cantilever beam. Building on their work,…
Category: Engineering
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Energy dissipation and dilation processes of rock mass under incremental cyclic loading and unloading
Principles of energy calculation
The area enclosed by the loading and unloading curve is the energy dissipation density of the material in unit kJ/m3 based on the energy dissipation mechanism. The accumulation deformation and failure of rock mass…
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Comprehensive analysis of challenges and two practical methods for protective coordination of distance relays in transmission lines connected to DFIG-based wind farms
DFIG-based WFs
A WF comprises many wind turbines operating based on induction generator. The turbines are interconnected using various configurations of cables and are linked to the HV network at a point known as the point of common connection…
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Performance assessment of BeiDou-3 PPP-B2b real time pre-cise point positioning
To evaluate the real-time positioning capabilities of PPP-B2b, we employed the Unistrong MG10s receiver—a high-precision GNSS terminal capable of processing PPP-B2b correction signals. This commercial-grade receiver was selected for its ability…
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Study of in situ stress inversion of deeply incised valleys considering the river evolution process
Numerical model
FLAC3D is finite element calculation software that is based on the fast Lagrange method, which has been widely used for in situ stress inversion in geotechnical engineering6,43. To study the influence of river evolution and…
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Meteorological data implications modeling on evapotranspiration variability in arid and semi-arid zones in Saudi Arabia using hybrid metaheuristic
Oliveira, S., Cunha, J., Nóbrega, R. L., Gash, J. H. & Valente, F. Enhancing global rainfall interception loss estimation through vegetation structure modeling. J. Hydrol. 631, 130672 (2024).
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Enhancing abrasive wear resistance of IS-2062 steel in hydroturbine applications with WC-12 Co and WC-10 Co-4 Cr HVOF coatings
Microstructural analysis of powder and coated surface
The SEM images and XRD analysis of both the candidate powder can be seen in Fig. 1. Both powders exhibit spherical and semi-spherical particles, which support good powder flowability, which is…
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Research on the technology of unloading pressure and preventing punching in extra-thick coal seams
Introduction to the hydraulic fracturing process
The double-end blocking and fracturing technology is characterized by the absence of a slit link, with both blocking and fracturing operations being executed through two distinct systems. This…
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Octopus-inspired robot can decide how to grip objects with accuracy
Scientists have developed a robot that can decide how to move or grip objects by sensing its environment. The device is inspired by octopus’ nervous system to grab items by sensing them.
Developed by researchers from the University of…
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China unveils world’s first ‘unhackable’ quantum cryptography system
As quantum computing advances, traditional encryption faces growing risks from powerful new algorithms. In a bid to address these issues, a government-owned company in China has introduced what it claims to be the world’s first commercial…
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