Results 231 to 240 of about 3,178,978 (295)

Frequency-comb enabled spectrum-correlation reflectometry for distributed fiber-optic sensing. [PDF]

Light Sci Appl
Lin Z, Zhao Z, He H, Chen C, Tang M, Soto MA.   +5 more
europepmc   +1 more source

A potential application of dual-mode metafilm for enhanced second harmonic generation in refractive index and angle measurement. [PDF]

iScience
Li X, Sui JY, Zhang HF.
europepmc   +1 more source

Measurement and Study of Electric Field Radiation from a High Voltage Pseudospark Switch. [PDF]

Sensors (Basel)
Wang J, Chen L, Yu X, Yang J, Li F, Jing W.   +5 more
europepmc   +1 more source

Heart rate variability analysis using electrocardiograms during cardio-ankle vascular index measurement shows good agreement with resting electrocardiogram-based analysis in patients with diabetes: a retrospective cross-sectional study. [PDF]

Diabetol Int
Shibata Y, Kiyose T, Himeno T, Shimoda M, Ando H, Ito A, Itani A, Shimizu T, Miura R, Matsuoka M, Tsuzuki K, Shinozaki T, Motegi M, Hayami T, Nakai-Shimoda H, Kato M, Miura-Yura E, Nakayama T, Morishita Y, Kondo M, Tsunekawa S, Nakamura J, Amano T, Kamiya H.   +23 more
europepmc   +1 more source

High sensitivity sensor for differential measurement of thickness of thin substrates using double T-shaped resonators. [PDF]

Sci Rep
Azimi S, Poormohammad S, Rasoulzadeh A, Najafi A.   +3 more
europepmc   +1 more source

Towards full optimisation of automated double electron-electron resonance spectroscopy.

Phys Chem Chem Phys
Karas H, Kuzin S, Stoll S, Jeschke G.
europepmc   +1 more source

Research on the application of unmanned aerial vehicle aeromagnetic measurement based on rubidium optical pump magnetometer. [PDF]

Sci Rep
Zhou H, Qiao Z, Yuan P, Huang Y, Zhu L, Yang C, Wang L, Zheng L, Wang Y, Wu B, Lin Q.   +10 more
europepmc   +1 more source

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Measurements at Radio Frequencies

Transactions of the American Institute of Electrical Engineers, 1940
IT IS interesting to recall that this art is less thana century old1 and that the early experimenters actually worked in the frequency range now called “hyper frequencies.”
Harry R. Meahl, P. C. Michel, M. W. Scheldorf, T. M. Dickinson   +3 more
openaire   +1 more source

Frequency standards and frequency measurement

Reports on Progress in Physics, 2002
Recent years have brought major breakthroughs in the development, operation and mutual comparison of frequency standards in the microwave as well as in the optical frequency domain. Several cold-atom fountains have been developed, using caesium as well as rubidium atoms. Some of them have been compared among each other. Mutual agreement of the order of
A Bauch, H R Telle
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Frequency-Domain Measurements

2020
Theoretically, the transformation from the time domain (TD) to the frequency domain (FD) does not involve any loss of information of the signal, but only a different representation of it. Depending on the application, the analysis of a signal in FD may be more useful for the characterization of signals and devices, since it separates the different ...
Cataldo A., Giaquinto N., De Benedetto E., Masciullo A., Cannazza G., Lorenzo I., Nicolazzo J., Meo M. T., De Monte A., Parisi G., Gaetani F.   +10 more
openaire   +3 more sources