Students may take the IELTS test as many times as they like, but after sitting an
lELTS test, the... more Students may take the IELTS test as many times as they like, but after sitting an lELTS test, they must wait for THREE MONTHS before they can take it again. This is an official rule, but in any case it is unlikely that a student's score will improve in less than three months.
... The farmers of the area mainly grow potatoes and ground-beans, and breed sheep. ... The case ... more ... The farmers of the area mainly grow potatoes and ground-beans, and breed sheep. ... The case of Tiraque highlights how not only socio-economic but also political dependency on the better ... problem and the pressure on these and other water points in the dry season is therefore ...
Journal of the American Chemical Society, Jan 14, 2015
The dynamic optical properties of perovskite CH3NH3PbI3 single crystals were studied by means of ... more The dynamic optical properties of perovskite CH3NH3PbI3 single crystals were studied by means of time-resolved photoluminescence (PL) spectroscopy at room temperature. The PL peak under one-photon excitation exhibits a red-shift with elapsing time, while two-photon PL is time-independent and appears at lower energy levels. The low-energy two-photon PL can be attributed to emissions from the localized states because of strong band-to-band absorption and photon re-absorption of the emitted light in the interior region. We revealed that the PL behaviors can be explained by the diffusion of photocarriers generated in the near-surface region to the interior region. The excitation fluence dependence of the one-photon PL dynamics is also discussed in terms of the electron-hole radiative recombination and carrier diffusion effects.
TENCON 2008 - 2008 IEEE Region 10 Conference, 2008
Hong Hee Lee*, Phan Quoc Dzung**, Le Dinh Khoa**, Le Minh Phuong**, Huynh Tan Thanh** *School of ... more Hong Hee Lee*, Phan Quoc Dzung**, Le Dinh Khoa**, Le Minh Phuong**, Huynh Tan Thanh** *School of Electrical Engineering, University of Ulsan, Ulsan, Korea **Faculty of Electrical & Electronic Engineering, HCMC University of Technology, Ho Chi Minh City, Vietnam hhlee ...
TENCON 2009 - 2009 IEEE Region 10 Conference, 2009
This paper presents a realization of the space-vector pulse-width modulation (SVPWM) strategy for... more This paper presents a realization of the space-vector pulse-width modulation (SVPWM) strategy for control system induction motor (IM). In this paper is presented a space vector PWM algorithm for four switch three phase inverters (B4, FSTPI) based on the one for six switch three phase inverters (B6, SSTPI) (principle of similarity) where the ¿�? plan is divided into 6 sectors
TENCON 2009 - 2009 IEEE Region 10 Conference, 2009
This paper proposes a new space vector PWM technique for four-switch three-phase inverters (FSTPI... more This paper proposes a new space vector PWM technique for four-switch three-phase inverters (FSTPI) under DC-link voltage ripple condition with the optimization of the amplitude of first harmonic output voltage. The proposed algorithm is based on the establishment of quasi-space-vectors with their maximum length and modulation technique, which is simulated the technique for six-switch three-phase inverters. This approach has a
2009 IEEE International Conference on Industrial Technology, 2009
This paper is to present a new space vector pulse width modulation (PWM) algorithm for four switc... more This paper is to present a new space vector pulse width modulation (PWM) algorithm for four switch three phase inverter (FSTPI) fed induction motor under DC-link voltage imbalance. By using reasonable mathematical transform, space vector PWM (SVPWM) technique for FSTPI under DC-link voltage imbalance or ripples have been solved, which is based on the establishment of basic space vectors and
Students may take the IELTS test as many times as they like, but after sitting an
lELTS test, the... more Students may take the IELTS test as many times as they like, but after sitting an lELTS test, they must wait for THREE MONTHS before they can take it again. This is an official rule, but in any case it is unlikely that a student's score will improve in less than three months.
... The farmers of the area mainly grow potatoes and ground-beans, and breed sheep. ... The case ... more ... The farmers of the area mainly grow potatoes and ground-beans, and breed sheep. ... The case of Tiraque highlights how not only socio-economic but also political dependency on the better ... problem and the pressure on these and other water points in the dry season is therefore ...
Journal of the American Chemical Society, Jan 14, 2015
The dynamic optical properties of perovskite CH3NH3PbI3 single crystals were studied by means of ... more The dynamic optical properties of perovskite CH3NH3PbI3 single crystals were studied by means of time-resolved photoluminescence (PL) spectroscopy at room temperature. The PL peak under one-photon excitation exhibits a red-shift with elapsing time, while two-photon PL is time-independent and appears at lower energy levels. The low-energy two-photon PL can be attributed to emissions from the localized states because of strong band-to-band absorption and photon re-absorption of the emitted light in the interior region. We revealed that the PL behaviors can be explained by the diffusion of photocarriers generated in the near-surface region to the interior region. The excitation fluence dependence of the one-photon PL dynamics is also discussed in terms of the electron-hole radiative recombination and carrier diffusion effects.
TENCON 2008 - 2008 IEEE Region 10 Conference, 2008
Hong Hee Lee*, Phan Quoc Dzung**, Le Dinh Khoa**, Le Minh Phuong**, Huynh Tan Thanh** *School of ... more Hong Hee Lee*, Phan Quoc Dzung**, Le Dinh Khoa**, Le Minh Phuong**, Huynh Tan Thanh** *School of Electrical Engineering, University of Ulsan, Ulsan, Korea **Faculty of Electrical & Electronic Engineering, HCMC University of Technology, Ho Chi Minh City, Vietnam hhlee ...
TENCON 2009 - 2009 IEEE Region 10 Conference, 2009
This paper presents a realization of the space-vector pulse-width modulation (SVPWM) strategy for... more This paper presents a realization of the space-vector pulse-width modulation (SVPWM) strategy for control system induction motor (IM). In this paper is presented a space vector PWM algorithm for four switch three phase inverters (B4, FSTPI) based on the one for six switch three phase inverters (B6, SSTPI) (principle of similarity) where the ¿�? plan is divided into 6 sectors
TENCON 2009 - 2009 IEEE Region 10 Conference, 2009
This paper proposes a new space vector PWM technique for four-switch three-phase inverters (FSTPI... more This paper proposes a new space vector PWM technique for four-switch three-phase inverters (FSTPI) under DC-link voltage ripple condition with the optimization of the amplitude of first harmonic output voltage. The proposed algorithm is based on the establishment of quasi-space-vectors with their maximum length and modulation technique, which is simulated the technique for six-switch three-phase inverters. This approach has a
2009 IEEE International Conference on Industrial Technology, 2009
This paper is to present a new space vector pulse width modulation (PWM) algorithm for four switc... more This paper is to present a new space vector pulse width modulation (PWM) algorithm for four switch three phase inverter (FSTPI) fed induction motor under DC-link voltage imbalance. By using reasonable mathematical transform, space vector PWM (SVPWM) technique for FSTPI under DC-link voltage imbalance or ripples have been solved, which is based on the establishment of basic space vectors and
Uploads
Books by Le Phuong
lELTS test, they must wait for THREE MONTHS before they can take it again. This
is an official rule, but in any case it is unlikely that a student's score will improve
in less than three months.
Papers by Le Phuong
lELTS test, they must wait for THREE MONTHS before they can take it again. This
is an official rule, but in any case it is unlikely that a student's score will improve
in less than three months.