Sentence examples for commercial frequency from inspiring English sources

It was necessary to use a lower frequency (16 2/3 hertz is common in Europe; 25 hertz in the United States); this in turn required either special railroad power plants to generate alternating current at the required frequency or frequency-conversion equipment to change the available commercial frequency into the railroad frequency.

In this article, the commercial frequency power, which is sine wave of 50 Hz, was supplied on the Langmuir probe to measure the plasma parameters.

We examined the transient response characteristics of a commercial frequency multiplier and found that the device can function as a multiplier for pulsed signal even though it was designed for continuous wave operation.

It is confirmed that the hysteretic losses in the filamentary region can be reduced by twisting in a same manner as in situ Nb3Sn multifilamentary ones, while the coupling loss remains in unsatisfactory situation for commercial frequency uses.

This threat is inherent to the actual wireless technology employed in this type of network, and in its most basic implementation (barrage jamming), there is no means to prevent an attacker from broadcasting a high power interfering signal on a commercial frequency band.

We have demonstrated more than 25 mJ operation of the 294 nm light source in a fine-tuned experiment in the laboratory [ 13]; however, unstable operation of the commercial frequency tripled Nd YAG laser with changing ambient temperature affected the stability of the UV pulse energy severely.

As wireless communication blossomed in the early 1990s, the Federal Communications Commission (FCC) received an increase in requests to use the limited commercial frequencies of the electromagnetic spectrum.

The optical properties, absorption coefficient (µa) and reduced scattering coefficient (µs′), are independently varied using liquid phantoms and measured concurrently with the flow index using a hybrid optical system combining a dual-wavelength DCS flow device with a commercial frequency-domain tissue-oximeter.

Our lab has recently built a hybrid instrument capable of the simultaneous measurement of absolute μa, μs′ and flow indices at multiple wavelengths, through combining a commercial frequency-domain NIR tissue-oximeter, the Imagent (ISS, Inc., IL, USA) [ 44, 45], and a custom-made NIR DCS flow-oximeter [ 31, 33, 41].

Interest in using commercial-frequency alternating current in the overhead wire continued, however; and in 1933 experiments were carried out in both Hungary and Germany.

Commercial high frequency test machines are practically nonexistent, and the best high frequency test machine on the market is only capable of frequencies as high as 1000 Hz.