The degradation and decolourization of direct dye(Everdirect supra turguoise blue,FBL),acidic dye(Isolan orange S-RL) and vat dye(Indanthren red FBB) have been investigated by solar/TiO2 process.The effects of solutio...The degradation and decolourization of direct dye(Everdirect supra turguoise blue,FBL),acidic dye(Isolan orange S-RL) and vat dye(Indanthren red FBB) have been investigated by solar/TiO2 process.The effects of solution pH,dye concentration,dosage of TiO2 and nano-size of TiO2 have been studied.The increase in initial pH(3,5 and 11) and dye concentration decrease the removal rate.The treatment for FBB and FBL dye solutions is more efficient than that of S-RL.Under optimum conditions,the color removal is found to be almost complete for FBB and FBL while that of S-RL also reaches 95%.Langmuir adsorption isotherm and modified Langmuir-Hinshelwood kinetic model(L-H model) have been fitted to the experimental data and found to correlate the adsorption patterns as well as the kinetics of the dyes studied.展开更多
A novel silicon-on-insulator（SOI） high-voltage pLDMOS is presented with a partial interface equipotential floating buried layer（FBL） and its analytical model is analyzed in this paper.The surface heavily doped p-t...A novel silicon-on-insulator（SOI） high-voltage pLDMOS is presented with a partial interface equipotential floating buried layer（FBL） and its analytical model is analyzed in this paper.The surface heavily doped p-top layers,interface floating buried N~＋/P~＋ layers,and three-step field plates are designed carefully in the FBL SOI pLDMOS to optimize the electric field distribution of the drift region and reduce the specific resistance.On the condition of ESIMOX（epoxy separated by implanted oxygen）,it has been shown that the breakdown voltage of the FBL SOI pLDMOS is increased from-232 V of the conventional SOI to-425 V and the specific resistance R_（on,sp） is reduced from 0.88 to 0.2424Ω·cm^2.展开更多
We develop fractional buffer layers(FBLs)to absorb propagating waves without reflection in bounded domains.Our formulation is based on variable-order spatial fractional derivatives.We select a proper variable-order fu...We develop fractional buffer layers(FBLs)to absorb propagating waves without reflection in bounded domains.Our formulation is based on variable-order spatial fractional derivatives.We select a proper variable-order function so that dissipation is induced to absorb the coming waves in the buffer layers attached to the domain.In particular,we first design proper FBLs for the one-dimensional one-way and two-waywave propagation.Then,we extend our formulation to two-dimensional problems,wherewe introduce a consistent variable-order fractionalwave equation.In each case,we obtain the fully discretized equations by employing a spectral collocation method in space and Crank-Nicolson or Adams-Bashforth method in time.We compare our results with a finely tuned perfectly matched layer(PML)method and show that the proposed FBL is able to suppress reflected waves including corner reflections in a two-dimensional rectangular domain.We also demonstrate that our formulation is more robust and uses less number of equations.展开更多
文摘The degradation and decolourization of direct dye(Everdirect supra turguoise blue,FBL),acidic dye(Isolan orange S-RL) and vat dye(Indanthren red FBB) have been investigated by solar/TiO2 process.The effects of solution pH,dye concentration,dosage of TiO2 and nano-size of TiO2 have been studied.The increase in initial pH(3,5 and 11) and dye concentration decrease the removal rate.The treatment for FBB and FBL dye solutions is more efficient than that of S-RL.Under optimum conditions,the color removal is found to be almost complete for FBB and FBL while that of S-RL also reaches 95%.Langmuir adsorption isotherm and modified Langmuir-Hinshelwood kinetic model(L-H model) have been fitted to the experimental data and found to correlate the adsorption patterns as well as the kinetics of the dyes studied.
基金Project supported by the National Natural Science Foundation of China(No.60906038)the National Defense Pre-Research Foundation of China(No.9140A08010308DZ02)+1 种基金the Science-Technology Foundation for Young Scientists of the University of Electronic Science and Technology of China(No.L08010301JX0830)the Department of Education of Sichuan in 2013(No.13ZA0089)
文摘A novel silicon-on-insulator（SOI） high-voltage pLDMOS is presented with a partial interface equipotential floating buried layer（FBL） and its analytical model is analyzed in this paper.The surface heavily doped p-top layers,interface floating buried N~＋/P~＋ layers,and three-step field plates are designed carefully in the FBL SOI pLDMOS to optimize the electric field distribution of the drift region and reduce the specific resistance.On the condition of ESIMOX（epoxy separated by implanted oxygen）,it has been shown that the breakdown voltage of the FBL SOI pLDMOS is increased from-232 V of the conventional SOI to-425 V and the specific resistance R_（on,sp） is reduced from 0.88 to 0.2424Ω·cm^2.
基金the support by the China Scholarship Council(No.201906890040)partial support by the Department of Energy by the PhILMs project(DE-SC0019453)by the MURI/ARO,USA on Fractional PDEs for Conservation Laws and Beyond:Theory,Numerics and Applications(W911NF-15-1-0562).
文摘We develop fractional buffer layers(FBLs)to absorb propagating waves without reflection in bounded domains.Our formulation is based on variable-order spatial fractional derivatives.We select a proper variable-order function so that dissipation is induced to absorb the coming waves in the buffer layers attached to the domain.In particular,we first design proper FBLs for the one-dimensional one-way and two-waywave propagation.Then,we extend our formulation to two-dimensional problems,wherewe introduce a consistent variable-order fractionalwave equation.In each case,we obtain the fully discretized equations by employing a spectral collocation method in space and Crank-Nicolson or Adams-Bashforth method in time.We compare our results with a finely tuned perfectly matched layer(PML)method and show that the proposed FBL is able to suppress reflected waves including corner reflections in a two-dimensional rectangular domain.We also demonstrate that our formulation is more robust and uses less number of equations.
