Shanghai Power Equipment Research Institute

Dependence of mechanical properties on microstructural partitioning driven by non-uniform rare-earth distribution in laser-CMT hybrid welded Mg-Al-Zn alloy

The insufficient mechanical properties in welded magnesium alloy joints, which are inherently due to weak metallic bonds, pose a considerable challenge that restricts their widespread application in lightweight aircraft structures. This paper focuses on the enhancement of mechani...

Experimental and Numerical Investigation of End-Tab Geometry Effects on the Compressive Response of Ultra-Thick CFRP Laminates

Compression testing of ultra-thick carbon-fibre-reinforced polymer (CFRP) laminates requires high loads to be transferred over a limited gripping length, while the stiffness discontinuity at the end-tab termination can initiate unintended local failure. This study examines the ef...

PID controller parameter optimization for ship fin stabilizers based on an improved secretary bird optimization algorithm

Fin stabilizers governed by proportional-integral-derivative (PID) controllers dominate active ship roll reduction, yet their performance depends critically on gain tuning under nonlinear hydrodynamics and time-varying sea states. This paper proposes an Improved Secretary Bird Op...

Taming the boundary effect: Femtosecond laser slicing of 4H-SiC enabled by side scribing for improved processability

The 4H polytype of silicon carbide (4H-SiC) has excellent properties such as high electron mobility and high saturation electron velocity; it has therefore become an important material for high-power and high-frequency devices. In the slicing step of wafer fabrication, however, c...

Enhancement of the optical and spin properties of silicon vacancies in proton-implanted 4H-SiC via femtosecond laser annealing

The silicon vacancy (VSi) in 4H-SiC represents a promising candidate for solid-state qubits. However, conventional high-temperature annealing typically suffers from undesired impurity diffusion and limited spatial localization during fabrication. Here, we present a femtosecond la...

Low-Patching-Error Fiber Bragg Grating Multi-Dimensional Force Sensor

In order to avoid the difficulties caused by patching-errors in fiber Bragg grating multi-dimensional force sensors, this paper applies equal strength beam structure to a crossbeam elastic element, designs and implements an improved fiber Bragg grating multi-dimensional force sen...