The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Dehai Luo - One of the best experts on this subject based on the ideXlab platform.
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a new Blocking index and its Application Blocking action in the northern hemisphere
Journal of Climate, 2006Co-Authors: Yina Diao, Dehai LuoAbstract:Abstract In this paper, a new two-dimensional Blocking index is proposed by defining a difference between the daily 500-hPa geopotenial heights at the reference latitude and its north side. The reference latitude is determined by a composite latitude-dependent 500-hPa geopotenial height of Blocking events in different seasons and sectors. The new index can take account of the duration, intensity, propagation, and spatial structure of a Blocking event. Using this index, the characteristics (frequency, duration, intensity, and preferred occurrence region) of the Blocking action in the North Hemisphere (NH) are investigated using a 42-yr sample of Blocking events from the NCEP–NCAR reanalyses. It is found that Blocking events in the NH are more frequent in the Atlantic–Europe sector than in the Pacific sector in winter and spring and autumn, but more persistent in the Atlantic–Europe sector than in the Pacific sector for all seasons. Blocking events in the Pacific sector tend to have larger amplitudes than t...
Yina Diao - One of the best experts on this subject based on the ideXlab platform.
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a new Blocking index and its Application Blocking action in the northern hemisphere
Journal of Climate, 2006Co-Authors: Yina Diao, Dehai LuoAbstract:Abstract In this paper, a new two-dimensional Blocking index is proposed by defining a difference between the daily 500-hPa geopotenial heights at the reference latitude and its north side. The reference latitude is determined by a composite latitude-dependent 500-hPa geopotenial height of Blocking events in different seasons and sectors. The new index can take account of the duration, intensity, propagation, and spatial structure of a Blocking event. Using this index, the characteristics (frequency, duration, intensity, and preferred occurrence region) of the Blocking action in the North Hemisphere (NH) are investigated using a 42-yr sample of Blocking events from the NCEP–NCAR reanalyses. It is found that Blocking events in the NH are more frequent in the Atlantic–Europe sector than in the Pacific sector in winter and spring and autumn, but more persistent in the Atlantic–Europe sector than in the Pacific sector for all seasons. Blocking events in the Pacific sector tend to have larger amplitudes than t...
T Ericsen - One of the best experts on this subject based on the ideXlab platform.
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future navy Application of wide bandgap power semiconductor devices
Proceedings of the IEEE, 2002Co-Authors: T EricsenAbstract:An assessment of future U.S. Navy electrical power requirements is presented to identify wide bandgap power device Application opportunities, issues, and challenges. An emphasis is placed on Blocking voltage and the potential of wide bandgap power semiconductor devices to enable higher voltage machines that can meet the U.S. Navy's future electrical power challenges. Estimates of the Blocking voltage and power requirements are made for various power systems envisioned for future shipboard Application. Blocking voltage estimates are made using a simplified stress level analysis to illustrate the basic concepts underlying power semiconductor device Application in U.S. Navy shipboard systems.
Syubhan Annur - One of the best experts on this subject based on the ideXlab platform.
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simple Blocking oscillator performance analysis for battery voltage enhancement
2015Co-Authors: Dewanto Harjunowibowo, Restu Widhi Hastuti, Kenny Anindia Ratopo, Anif Jamaluddin, Syubhan AnnurAbstract:An Application Blocking Oscillator (BO) on a battery to power a system LED lamp light detector has been built and compared with a standard system used phone cellular adapter as the power supply. The performance analysis was carried out to determine the efficiency of the Blocking oscillator and its potency to be adopted in an electronic appliance using low voltage and current from a battery. Measurements were taken using an oscilloscope, a multimeter, and a light meter. The results show that the system generates electrical pulses of 1.5 to 7.6 VDC and powering the system normally. The system generates 3.167 mW powers to produce the intensity of 176 Lux. On the contrary, the standard system needs 1.8mW to produce 5 Lux. A LED usually takes at least 60mW to get 7150 Lux. Therefore, the system used a simple Blocking oscillator seems potential to provide high voltage for powering electronic appliances with low current. Key words: Blocking oscillator, characteristic, efficiency, LED, pulse
Dewanto Harjunowibowo - One of the best experts on this subject based on the ideXlab platform.
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simple Blocking oscillator performance analysis for battery voltage enhancement
2015Co-Authors: Dewanto Harjunowibowo, Restu Widhi Hastuti, Kenny Anindia Ratopo, Anif Jamaluddin, Syubhan AnnurAbstract:An Application Blocking Oscillator (BO) on a battery to power a system LED lamp light detector has been built and compared with a standard system used phone cellular adapter as the power supply. The performance analysis was carried out to determine the efficiency of the Blocking oscillator and its potency to be adopted in an electronic appliance using low voltage and current from a battery. Measurements were taken using an oscilloscope, a multimeter, and a light meter. The results show that the system generates electrical pulses of 1.5 to 7.6 VDC and powering the system normally. The system generates 3.167 mW powers to produce the intensity of 176 Lux. On the contrary, the standard system needs 1.8mW to produce 5 Lux. A LED usually takes at least 60mW to get 7150 Lux. Therefore, the system used a simple Blocking oscillator seems potential to provide high voltage for powering electronic appliances with low current. Key words: Blocking oscillator, characteristic, efficiency, LED, pulse