In order to research the influence of the contamination around the external insulating surface of DC voltage divider with different types in the electic field distribution by using the finite element method, a two dimensional axisymmetric model of the DC voltage divider in Longquan convertor station is built. Through the calculation comparison in electrostatic and quasi-electrostatic field, the...

A human body can be considered as a communication channel in which the electrical signal propagates through the body based on an electrostatic coupling mechanism when the frequency is sufficiently low. Since the human body approximately acts as a conductor in this case, we can detect the existence of the human body by measuring the corresponding electric filed variation in a close proximity of ...

Localized electric filed enhancement by surface plasmon resonance (SPR) of noble metal nanoparticles is an effective method to amplify the upconversion luminescence (UCL) strength of upconversion nanoparticles (UCNPs), whereas the highly effective UCL enhancement of UCNPs in colloids has not been realized until now. Here, we designed and fabricated the colloidal Au-Ag nanocage@NaYF4@NaYF4:Yb,Er...

Optical traps or tweezers use the forces exerted by structured beams of light to confine and manipulate non-intrusively and non-destructively microscopic objects including living cells and bacteria, with high accuracy. This technique provides unique means to control the dynamics of small particles and played a revolutionary role in areas of the physical and biological sciences. This manuscript ...

and Applied Analysis 3 here ε is the group parameter, and X is vector filed. A system of partial differential equations (6) is said to admit a symmetry generated by the vector filed as

The drift mobility for electrons and holes, small-signal mobility lifetime product, trapped-carrier density of states in addition to other correlated physical parameters of microcrystalline silicon sample are estimated from the analysis of fielddependent experimental data using steady-state photocarrier grating technique. The filed-dependent experimental data at room temperature of the sample w...

Laser based lightning control holds a promising way to solve the problem of the long standing disaster of lightning strikes. But it is a challenging project due to insufficient understanding of the interaction between laser plasma channel and high voltage electric filed. In this work, a direct observation of laser guided corona discharge is reported. Laser filament guided streamer and leader ty...

Solving the Maxwell’s equations, an electric filed enhancement is observed in monochromatically irradiated, oneand twodimensional dispersed dielectric solids with random size distribution. This enhancement is a few orders of magnitude higher than the incident field, for some arrangements. The probability density and the location of enhanced field are determined forgiven solid complex refractive...

Low on-state voltage and low turn-off loss are key issues for IGBT used in HVDC FACTS. Partial narrow mesa was introduced to improve emitter side contact resistance of based on Nakagawa limit assumption. However, increases short circuit sustainability get worse. Split gate separates electrode from drift region reduces gate-collector capacitance lower energy loss. Combination partial with split ...