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Swellings Identification from Head and Neck computed tomography image data is an important but time consuming task performed manually by medical experts. Automating this process is challenging due to the high diversity in the appearance of tumor tissues among different patients. In many cases, the task of identifying the location of the tumor in Head and Neck is very complicated. The abnormal tissues...
This work demonstrates the technique of micro stepping control in removal of head and neck exophytic lesion. It also helps to detect tumor position accurately by using Permanent Magnet stepper Motors (PMSM) using artificial neural network methods without injury to the adjacent structures. Estimation of dynamic load parameters i.e. moment of inertia and friction coefficient is necessary for accurate...
Resection of Head and Neck Swellings by current medical instruments is a time consuming task. It causes injuries in the adjacent structures. In addition, it lacks accuracy. These reasons made it essential to develop an automatic tool for the resection process. The variance and intricacy of the swelling location makes the design of such tool very difficult. The proposed tool makes use of the artificial...
Swellings identification from Head and Neck computed tomography image data is an important but time consuming task performed manually by medical experts. Automating this process is challenging due to the high diversity in the appearance of tumor tissues among different patients. In many cases, the task of identifying the location of the tumor in Head and Neck is very complicated. The abnormal tissues...
This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed states becomes...
This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed states becomes...
This paper presents a new modification for the most-common, simple, and well-known three-phase six-switch voltage source inverter (VSI). In this modification, each one of the six transistors conducts for 150deg instead of the known 180deg or 120deg conduction modes. For a wye-connected load, the output phase-voltage becomes a seven-level, 12 steps waveform. This results in a 50% reduction of the total...
This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy (OLSS) intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed switching...
This paper presents a new modification for the most-common, simple, and well-known three-phase voltage source inverter (VSI). In this modification, each one of the six transistors conducts for 150deg instead of the usual 180deg or 120" conduction modes. For a wye-connected load, the output phase-voltage becomes a seven-level, 12 Steps waveform-which is closer to the sinusoidal waveform-than the...
This paper presents a new modification for the most-common, simple, and well-known three-phase six-switch voltage source inverter (VSI). In this modification, each one of the six transistors conducts for 150deg instead of the known 180deg or 120deg conduction modes. For a wye-connected load, the output phase-voltage becomes a seven-level, 12 steps waveform. This results in a 50% reduction of the total...
This paper presents a new modification for the most-common, simple, and well-known three-phase voltage source inverter (VSI). In this modification, each one of the six transistors conducts for 150deg instead of the usual 180deg or 120deg conduction modes. For a wye-connected load, the output phase-voltage becomes a seven-level, 12 steps waveform which is closer to the sinusoidal waveform than the...
This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy (OLSS) intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed states...
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