指向性

• Ndb non - directional radio beacon
  无指向性无线标识
• Directivity index of microphone
  传声器指向性指数
• 3 . directional signal sending and receiving improve the signal strength
  3 .指向性收发讯号，改善讯号接收及加强稳定性。
• Study interest is characteristic of the direction , emotion and motivation
  学习兴趣具有指向性、情绪性、动力性等特点。
• It is an important support of smart antenna directional transmitting and receiving technology
  它是智能天线指向性发射与接收的重要的技术基础。
• Development in direction of children ' s empathy experiencing and influence of different language prompts
  儿童移情指向性的发展及不同语言提示的作用
• The directivity , sensitivity and gain of the extended hydrophone are researched based on the model
  以此模型为基础,计算分析了成组光纤水听器的指向性和灵敏度。
• It has the nature of randomness , generality , problem solving , radiativeness , directionality and creativity
  它具有随机性、概括性、问题性、辐射性、指向性和创造性。
• Moreover , taking on the rayleigh integral the far field acoustic pressure and the directivity formula is obtained
  并对其声场远场采用瑞利积分推导了一般表达式和指向性公式。
• The hydrophone is the bigger enough compared to the wavelength of the sound , the directivity is the more distinctness
  成组光纤水听器尺寸越大,接收信号波长越短,其指向性越明显。