Jianghan Zhang

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This paper proposes a simple method for single switch and double switches open-circuit fault diagnosis in pulsewidthmodulated voltage-source inverters (PWM VSIs) for vectorcontrolled induction motor drives, which also applies to secondary open-circuit fault diagnosis. According to the phase angle of one phase current, the repetitive operation process of VSI(More)
PURPOSE To develop a software tool to extract dose planes base on on the setup (red) laser positions for Tomotherapy delivery QA(DQA). METHODS We have a develop a simple tool to simplify a time-consuming step for tomotherapy DQA. The DQA analysis tools in Tomotherapy software was useful for film dosimetry but not convenient for 2D-array QA devices.(More)
PURPOSE To compare dose reconstruction accuracy with different oblique beam angles when 2d detector arrays are used for small field IMRT QA. METHODS 2D detector arrays are convenient to use but their low resolution limits the number of sampling points inside small radiation fields. In this study, we demonstrate that with oblique beam incidence, more(More)
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