Browsing by Author "LIU, WC"

Now showing 1 - 6 of 6

AN UNPRECEDENTED OXIDATION REACTION OF CYCLOPENTADIENE DERIVATIVES BY PYRIDINIUM CHLOROCHROMATE
(1988-06-01)
WU, HJ
;
PAN, K
;
HSIA, KS
;
LIU, WC
;
交大名義發表
APPLICATION OF SUPERLATTICE GATE AND MODULATION-DOPED BUFFER FOR GAAS POWER MESFET GROWN BY MBE
(1989-09-01)
LIU, WC
;
LOUR, WS
;
CHANG, CY
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
HIGH CARRIER DENSITY AND MOBILITY IN GAAS/INGAAS/GAAS DOUBLE DELTA-DOPED CHANNELS HETEROSTRUCTURES
(1995-01-01)
KAO, MJ
;
HSU, WC
;
SHIEH, HM
;
LIU, WC
;
CHANG, CY
Double-quantum-well GaAs/InGaAs/GaAs pseudomorphic heterostructures by delta-doping the InGaAs channels are demonstrated for the first time. A very high carrier density of more than 1 x 10(13) cm-2 along with an enhanced mobility of 2100 cm2/V.s at 300 K are achieved. Influences of barrier thickness on the carrier densities and mobilities are also investigated.
MBE GROWN UNDOPED SUPERLATTICE GATE AND MODULATION-DOPED BUFFER STRUCTURE FOR POWER FET APPLICATIONS
(1989-06-01)
LIU, WC
;
HSU, WC
;
LOUR, WS
;
WANG, RL
;
CHANG, CY
ONLINE METHOD FOR MEASUREMENT OF THE DISPERSION COEFFICIENT OF RADIONUCLIDE MIGRATION USING A COLUMN METHOD
(1992-12-01)
LIU, WC
;
LO, JG
;
TSAI, CM
;
環境工程研究所
;
Institute of Environmental Engineering
An On-line method to obtain breakthrough curves from a conservative tracer generated in crushed rock columns has been introduced. The breakthrough curve can be used to evaluate some important hydrologic Parameters for studying radionuclide migration in groundwater system. These parameters include the dispersion coefficient, average flow yelocity, effective porosity, and retardation factor of the columns tested. A conservative radiotracer, I-131, was used to generate the breakthrough curves, and linear regression analysis was applied to obtain the optimum value of dispersion coefficient. The effects of the injected volume of radioactive tracer, average flow velocity, and effective diameter of packed material on the dispersion coefficient as well as the stability of the packed material, and their in-situ application are discussed.
ONLINE METHOD FOR MEASUREMENT OF THE DISPERSION COEFFICIENT OF RADIONUCLIDE MIGRATION USING A COLUMN METHOD
(1992-12-01)
LIU, WC
;
LO, JG
;
TSAI, CM
;
環境工程研究所
;
Institute of Environmental Engineering
An On-line method to obtain breakthrough curves from a conservative tracer generated in crushed rock columns has been introduced. The breakthrough curve can be used to evaluate some important hydrologic Parameters for studying radionuclide migration in groundwater system. These parameters include the dispersion coefficient, average flow yelocity, effective porosity, and retardation factor of the columns tested. A conservative radiotracer, I-131, was used to generate the breakthrough curves, and linear regression analysis was applied to obtain the optimum value of dispersion coefficient. The effects of the injected volume of radioactive tracer, average flow velocity, and effective diameter of packed material on the dispersion coefficient as well as the stability of the packed material, and their in-situ application are discussed.