搜索结果: 1-6 共查到“frequency measurement”相关记录6条 . 查询时间(0.171 秒)
Remote frequency measurement of the 1S0-3P1 transition in laser cooled 24Mg
Remote frequency measurement 1S0-3P1 transition laser cooled 24Mg Quantum Gases
2011/8/4
Abstract: We perform Ramsey-Borde spectroscopy on laser cooled magnesium atoms in free fall to measure the 1S0-3P1 intercombination transition frequency. The measured value of 655 659 923 839 730 (48)...
Large range microwave frequency measurement using a fiber delay interferometer pair
fiber delay interferometer pair microwave frequency measurement
2015/5/15
We demonstrate a photonic approach to IFM using two parallel home-made fiber delay interferometers, packaged into a 10cm×8cm board. A maximum measurement frequency of 36.7GHz and measurement error les...
Instantaneous Frequency Measurement with Digital Outputs Based on An Optical Filter Array
Optical Filter Digital Output Instantaneous Frequency Measurement
2015/5/15
A photonic approach using an optical filter array is proposed to perform instantaneous frequency measurement with digital outputs. 4-bit digital outputs are then experimentally demonstrated within the...
黄瓜幼苗自发声频率测定方法与试验（Method and Experiment of Spontaneous Acoustic Frequency Measurement on Cucumber）
设施园艺 植物声频控制 自发声频率 功率谱
2010/12/29
声波处理技术对于设施园艺中植物的生长具有促进作用，但其促进机理不明确，为此以黄瓜为研究对象，对植物自发声频率的测定方法进行了研究，并研究了黄瓜幼苗期的自发声频谱特性。在半消音室内，采用PDV-100激光测振仪，以非接触测量的方式，对黄瓜幼苗不同部位（主脉、叶肉和茎）在不同环境应激条件下（增大光照强度和干旱胁迫）的自发声特性进行监测。对自发声信号进行自相关运算和功率谱分析，获得了黄瓜幼苗的自发声频谱...
Textronics – Electrical and Electronic Textiles. Sensors for Breathing Frequency Measurement
textronic interactive textiles textile sensors
2009/2/12
The aim of this paper is to present research work into designing prototype textile sensors devoted to measuring a human physiological signal, the frequency of breathing. These sensors
may be used in ...
Photolysis frequency measurement techniques: results of a comparison within the ACCENT project
Photolysis frequency measurement ACCENT project
2008/11/19
An intercomparison of different radiometric techniques measuring atmospheric photolysis frequencies j(NO2), j(HCHO) and j(O1D) was carried out in a two-week field campaign in June 2005 at Jülich, Germ...