The first paratyphoid early clinical symptoms were mainly fever, dizzy, headache, pharyngoxerosis, pharynx-ache and dry-cough with 7-27 days of incubation period, average 15 days.
甲型副伤寒早期临床症状以发热、头晕、头痛、咽干、咽痛、干咳为主，潜伏期7 ~ 27天，平均15天。
The improved period-average-mode of the single-phase PWM VSC is set up, and the current control scheme based on the model is presented.
建立了PWM逆变器的改进型周期平均模型，并给出了基于此模型基础上的电感电流控制方式；
The improved period-average-mode of the single-phase PWM VSC is set up, and the current control scheme based on the model is presented.
建立了PWM逆变器的改进型周期平均模型，并给出了基于此模型基础上的电感电流控制方式；
应用推荐