频

• A multi - wavelet packets modulation based on ds - ss
  基于直接扩频的多小波包调制
• Optical damage investigation of raman shifting laser
  喇曼频移激光器的光损伤研究
• Finally different vscf technologies are analyzed
  最后对比分析了变速恒频技术。
• Dualband and dual - polarized frequency selective surfaces
  双频双极化频率选择表面
• A practical 4 - phase chaos spread - spectrum sequences
  一种实用的四相混沌扩频序列
• Mains frequency coreless , induction furnace for melting copper
  工频无心感应熔铜炉
• Reform and application of frequency - sensible resistor
  频敏电阻器的改制及应用
• Spread spectrum realization of digital image watermarking
  数字图像水印的扩频实现
• Diesel generating sets of 50hz technical conditions for
  工频柴油发电机组技术条件
• Study of wavelet transform analysis of heart sounds
  频域分析及其相应的判断与处理