Category: Engineering

As shown in Fig. 1a, conventional couplers use \(\lambda /4\)-long transmission lines, leading to large overall dimensions. To address this limitation and reduce circuit size, the quarter-wavelength transmission lines are replaced with parallel…

Catalyst characterization

The surface properties and chemical compositions of kaolin and RHAC are summarized in Table 1. RHAC exhibited a dramatically higher BET surface area (1,291.88 m²/g) compared to kaolin (10.85 m²/g), reflecting its…

We introduce an efficient PKEET scheme under integer lattice and analyze its correctness in this subsection. Additionally, using the quantum security model, we demonstrate that the construction is one-way secure and can withstand the chosen…

LLC resonant power converter has been widely used in DC auxiliary power supply system for rail transit vehicles, due to its soft-switching capability, high power density and high efficiency^1,2,3,4,5. There are many applications that can…

In millimeter-wave communication, MIMO antennas are essential and play a vital role, especially in 5G and 6G. Because of the substantial path loss at millimeter wave frequencies, MIMO improves coverage and reliability by strengthening signals…

The objective of this study is to conduct a comprehensive investigation into the energy dissipation characteristics of slag at the bottom outlet of a chute structure, with a particular emphasis on the effects of varying lengths and angles of…

Materials

Feedstock (mixed oils)

The feedstock utilized in the current investigation comprises a blend of waste cooking oil (WCO) and unrefined palm oil, formulated at an optimized ratio as delineated in the Methodology section, to achieve enhanced…