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- air current ripple 风成波纹
- A glider buoyed by air currents. 通过流浮在水面上的滑翔机
- Faulty air current under the licker in, cylinder &doffer. 刺辊、锡林和道夫下的气流流通不好。
- The defoliation was buoyed up by a rising air current. 那片落叶被一股上升的气流浮起。
- Maglev chopper is the switch mode current amplifier on EMS maglev train,and the input current ripple is significant. 悬浮斩波器是EMS型磁浮列车上的开关型电流放大器,由此造成输入电源的电流纹波较大。
- A goose's wings churn the air and leave an air current behind. 一只大雁的翅膀扇动空气，在身后留下一股气流。
- The falling leaf was buoyed up by a rising air current. 那片落叶被一股上升的气流浮起。
- It features full-range ZVS, zero DC-bias magnetizing current, symmetrical voltage stress, low output current ripple, and better dynamic response. 搭配此方法之不对称半桥转换器具有全范围零电压切换、无直流偏磁问题、整流二极体有相同耐压、较低输出电流涟波以及较佳之动态响应。
- The ground always releases heat, making turbulent air current. 地面经常释放热量，造成有湍流的空气流动。
- A multi-leg boost converter is designed in this system to reduce the output current ripple and increase the life time of fuel-cell. 燃料电池经由多臂式升压型直流-直流功率转换器供给负载能量，在相同的切换频率下，其燃料电池之输出电流涟波降低，以提高燃料电池使用寿命。
- Birds use warm air currents to help their flight. 鸟利用暖气流助飞。
- If the plane drops suddenly,it is probably an air pocket (air current ). 如果飞机突然下落，可能是碰到了气阱(气流)。
- If the plane drops suddenly, it is probably an air pocket (air current ). 如果飞机突然下落，可能是碰到了气阱(气流)。
- The new modified formula not only meets with our experiment result, but also can explain the examples of relationship between the speed and the current ripple frequency of DC motors in the literature. 新的修正公式不仅能够解释文中的实验结果，也能满足以往文献提出的直流电动机转速与脉动电流频率之间的关系。
- The DC active filter (DAF), with very low current ripple, of the stable power supply system of high magnetic field device is developed by using the PWM and parallel active power filter technique. 摘要对稳态强磁场装置电源所需的直流有源滤波器(DAF)进行了设计，提出了利用PWM及并联有源滤波技术的滤波方案。
- The frequency of the current ripple caused by brush commutation in the DC motor is determined by the number of commutator bars, the number of asynchronous commutated brushes, and the rotation speed. 认为换向造成的电流脉动除了与转速有关以外还与换向片数以及不能同时换向的电刷个数有关。
- Modified formula for sensorless DC motor speed estimation was proposed through the test for relationship between the current ripple frequency and the rotation speed in a 4-pole DC motor. 摘要根据4极直流电动机的转速与脉动电流频率关系的实验结果，对现有的无传感器直流电动机测速公式提出了修正意见。
- Radiating form the earth, heat causes air currents to rise. 热量由地球辐射出来时，使得气流上升。
- Radiating from [/url] earth, heat causes air currents to rise. 热量由地球辐射出来时，使得气流上升。
- These gases are then transported by air currents over wide regions. 这些混合气体然后被气流大范围的转移。
