Synthesis of InP nanoparticles by pulsed laser ablation in ethanol
Materials Chemistry and Physics, 2010
We have synthesized InP nanoparticles using laser ablation in ethanol using 532nm and 266nm pulse... more We have synthesized InP nanoparticles using laser ablation in ethanol using 532nm and 266nm pulses of Q-switched Nd: YAG laser operating at repetition rate of 10Hz. The average particle size estimated from transmission electron microscopy (TEM) is 4–10nm for 532nm and 2–3nm for 266nm pulses. The optical transmission spectra show large blue shift form nanoparticles prepared with 266nm laser pulses
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Papers by brijesh kumar
inverter using selective harmonic elimination technique by PIC16F877A
microcontroller, whereas the notch angles are calculated through particle
swarm optimization (PSO) technique. This technique is proposed to minimize the overall total harmonic distortion (THD) of the output voltage of PWM inverter and corresponding switching angles are computed. This method is applied for the bipolar switching case, in three-phase inverter for three switching angles and five switching angles. The switching angles are computed to completely eliminate the lower order harmonics.
an optimization problem which is solved by applying particle
swarm optimization (PSO) technique. The derived equation
for the computation of total harmonic distortion (THD) of the
output voltage of the multilevel inverter is used as the objective
function in PSO algorithm. The objective function used is to
reduce the THD of the multilevel inverter and obtain the
corresponding switching angles with the elimination of
possible lower order harmonics. In this paper a pseudo code
based algorithm is proposed to deal with inequality constraints
which will helps in accelerating the optimization process. The
proposed method is applied for seven level cascade inverter to
eliminate the 5th and 7th order harmonics to reduce the total
harmonic distortion .This proposed PSO algorithm is effective
in reducing the total harmonic distortion corresponding the
range of modulation index. The simulation results shows that
the proposed PSO method is indeed capable of obtaining
higher quality of solutions to eliminate 5th and 7th order
harmonics and to reduce the total harmonic distortion of 7-
level cascade inverter
angles are computed. This method is applied for the bipolar
switching in three phase inverter for three switching angles
and five switching angles. The switching angles are computed
to completely eliminate the lower order harmonics. The result
of the bipolar case using three switching angles are compared
with that of a recently reported work, based on PSO technique,
and is observed that the proposed method is effective in
eliminating the lower order harmonics completely and overall
THD is reducing to a greater extent than the previously reported work.
inverter using selective harmonic elimination technique by PIC16F877A Micro controller, whereas the notch angles are calculated through particle swarm optimisation (PSO) technique. This technique is proposed to minimise the overall total harmonic distortion (THD) of the output voltage of PWM inverter and corresponding switching angles are computed. This method is applied for the bipolar switching case, in three-phase inverter for three switching angles and five switching angles. The switching angles are computed to completely eliminate the lower order harmonics.
inverter using selective harmonic elimination technique by PIC16F877A
microcontroller, whereas the notch angles are calculated through particle
swarm optimization (PSO) technique. This technique is proposed to minimize the overall total harmonic distortion (THD) of the output voltage of PWM inverter and corresponding switching angles are computed. This method is applied for the bipolar switching case, in three-phase inverter for three switching angles and five switching angles. The switching angles are computed to completely eliminate the lower order harmonics.
an optimization problem which is solved by applying particle
swarm optimization (PSO) technique. The derived equation
for the computation of total harmonic distortion (THD) of the
output voltage of the multilevel inverter is used as the objective
function in PSO algorithm. The objective function used is to
reduce the THD of the multilevel inverter and obtain the
corresponding switching angles with the elimination of
possible lower order harmonics. In this paper a pseudo code
based algorithm is proposed to deal with inequality constraints
which will helps in accelerating the optimization process. The
proposed method is applied for seven level cascade inverter to
eliminate the 5th and 7th order harmonics to reduce the total
harmonic distortion .This proposed PSO algorithm is effective
in reducing the total harmonic distortion corresponding the
range of modulation index. The simulation results shows that
the proposed PSO method is indeed capable of obtaining
higher quality of solutions to eliminate 5th and 7th order
harmonics and to reduce the total harmonic distortion of 7-
level cascade inverter
angles are computed. This method is applied for the bipolar
switching in three phase inverter for three switching angles
and five switching angles. The switching angles are computed
to completely eliminate the lower order harmonics. The result
of the bipolar case using three switching angles are compared
with that of a recently reported work, based on PSO technique,
and is observed that the proposed method is effective in
eliminating the lower order harmonics completely and overall
THD is reducing to a greater extent than the previously reported work.
inverter using selective harmonic elimination technique by PIC16F877A Micro controller, whereas the notch angles are calculated through particle swarm optimisation (PSO) technique. This technique is proposed to minimise the overall total harmonic distortion (THD) of the output voltage of PWM inverter and corresponding switching angles are computed. This method is applied for the bipolar switching case, in three-phase inverter for three switching angles and five switching angles. The switching angles are computed to completely eliminate the lower order harmonics.