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Background
The two‐step irradiance schedule in photodynamic therapy (PDT) is an emerging treatment method with a remarkable analgesic effect. We evaluated the influencing factors of pain in condyloma acuminate (CA) treatment with a two‐step irradiance schedule.
Methods
All patients were randomly divided into a two‐step irradiance group and control group. The two‐step irradiance group used 40 mW/cm...
Power devices short circuit or open circuit fault can have serious impact on the reliability of the photovoltaic inverter system during the operational process. On the basis of analysis of the fault characteristics and types with neutral point clamped three-level photovoltaic inverter as the research object, fault diagnosis logic is given. Fault tolerant control strategy for three-level photovoltaic...
Compensation current detection is one of the key technologies of STATCOM, traditional methods based on the instantaneous reactive power theory have detection error or unable to detect the fundamental reactive current component accurately under the unbalanced grid voltage condition. On the basis of mathematic model of three-level STATCOM analysis, a novel compensation current detection method of three-level...
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