11 research outputs found
Review on HVDC cable terminations
With modern power utilities going green by utilising renewable energy technologies and the development of the smart power grid, high-voltage direct current (HVDC) technologies become more and more important in the energy transmission. In particular, HVDC cable systems play a prominent role in undersea power transmission and offshore renewable energy integration. As an essential part of a complete HVDC cable system, the cable termination is one of the most critical components. The mathematical and physical background of HVDC cable systems is discussed and the development of various types of HVDC cable terminations is reviewed. Regarding the non-uniform field distribution, the influence of temperature on the non-linear conductivity is briefly discussed. Furthermore, faults of terminations caused by inappropriate installation and testing of cable systems are discussed
Synthesis of a Novel Core–Shell Nanocomposite Ag@SiO<sub>2</sub>@Lu<sub>2</sub>O<sub>3</sub>:Gd/Yb/Er for Large Enhancing Upconversion Luminescence and Bioimaging
Upconversion nanocrystals have many
advantages over other fluorescent materials. However, their upconversion
luminescence intensities are not desirable, limiting their applications
for highly sensitive detection. Therefore, it is really important
to enhance upconversion luminescent intensities of upconversion nanocrystals.
In the present study, a novel Ag core and upconversion nanocrystal
shell based nanocomposite Ag@SiO<sub>2</sub>@​Lu<sub>2</sub>O<sub>3</sub>:Gd/Yb/Er for metal-enhanced upconversion luminescence
was fabricated successfully, and its morphology, crystalline phase,
composition, optical property, and cell imaging application were investigated.
It was found that a maximum upconversion luminescence enhancement
of 30-fold was obtained in comparison with the control without a silver
core, and the nanocomposite exhibited bright upconversion luminescence
when it was used for imaging with HeLa cells. This enhancement potentially
increases the overall upconversion nanocrystal detectability, endowing
the nanocomposite with a potential capability for highly sensitive
biological, medical, and optical detection