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- This paper investigated the characteristics of 70 W MHL operating with DC, Low frequency square wave (LFSW) and magnetic ballasts, and the results may assist the matching of HID lamps and ballasts. 本文比较研究了直流电子镇流器、低频方波镇流器和电感镇流器燃点70 W小功率金卤灯过程中对灯特性的影响，为镇流器和金卤灯的匹配提供依据。
- A Low Frequency Square Wave HID Electronic Ballast with Digital Control 一种数字控制的低频方波HID灯用电子镇流器
- Treatment of chronic waist pain by low frequency square wave combined with exercise 低频方波配合运动疗法治疗慢性腰痛的临床报告
- Janos Melis,Oscar Vila-Masot,”Low frequency square wave electronic ballast for gas discharge lamps”,United states patent No.5428268,date of patent:June,27.1995 林国庆，陈为，陈和平.;新型恒功率输出开关变换器控制策略的研究[J]
- low frequency square wave 低频方波
- field frequency square wave response 场频方波响应
- Excellent staable are from Ac square wave, avoid high frequency hazard. 交流方波自稳弧性能优异,免除高频危害。
- field frequency square wave 场频方波
- By using the A/D transformer with middle low speed two methods of the magnitude sampling are proposed for two types of square wave signals with the middle high frequency in this paper. 提出了利用中低速A／D转换器对两类中高频方波信号幅值采样的方法，不仅可以降低仪器成本，而且能有效地避免误采、失码等现象。
- In electronics, undesirable low frequency currents interfering with a desired signal, and usually caused by a poorly screened alternating mains supply. 在电子学领域，一种不希望发生的低频电流，它干扰所要求的信号。通常这种现象是由于交流供电线路屏蔽不良引起的。
- The abnormal colours of seedlings turned a low frequency. 颜色异常的苗木出现频率较低。
- Adjustable square wave generator, square wave to control the amplitude, frequency, duty cycle. 可调方波发生器，可以控制方波的幅值，频率，占空比。
- Laser direct writing of micro-OVD with low frequency templates[J]. 引用该论文 魏国军;周小红;周雷;陈林森.
- Square waves, like sine waves, are periodic. 方波如正弦波一样是周期性的。
- Ground roll wave has characteristics of strong energy, low frequency and slow attenuation. 摘要面波具有能量强、频率低、吸收衰减缓慢等特点。
- The concept of square wave and EFT drive unit are introduced in this paper. 本文介绍方波信号发生器及场效应管驱动器的原理与设计。
- The penetrating capability of ultrasonic wave in viscoelastic medium was improved by using low frequency transducers. 采用研制的低频组合探头,提高了声波在粘弹介质中的穿透能力。
- When the square wave signal pass the LPF,we can get the sine signal. 经过分析可知,检测过程中的低通滤波器对检测的精度和速度有重要影响。
- This effect is obvious at lower frequency band. 这种效应在振动低频区段更为显著。
- Introduce the principle of MOSFET AC square wave inverter power source. 介绍了MOSFET交流方波逆变电源的工作原理。
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
