Results 271 to 280 of about 1,755,884 (316)

Variable ratio frequency converter

Electrical Engineering, 1932
Two synchronous-induction frequency converters with controllable frequency ratio and full automatic features were chosen to tie a 25-cycle and a 60-cycle system. Consideration of generation loads, load cycles, and stability of both systems led to the selection of this type of unit.
L. V. Nelson, E. L. Hough
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Automatic control for variable ratio frequency converters

Electrical Engineering, 1931
An automatic switching equipment for the control of two 20,000-kw. frequency changer sets using the Scherbius method of load and power factor control has been in successful operation at the Page Avenue station of the Union Electric Light and Power Company of St. Louis, for almost a year.
E. K. Shively, Geo. S. Whitlow
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Monitoring the frequency and magnitude of an event with a ratio chart

2015 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM), 2015
Control charts for monitoring the event has attracted many researchers' interests and many works have been done in recent years. However, previous works always neglect the dependence between event frequency and event magnitude and this kind of ignorance may make the control chart not suitable in some real applications.
Yuan Cheng, Sven Knoth, Min Xie 0001
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Optical refractive synchronization frequency sampling ratio amplitude ratio between the clock frequency and the modulated frequency

SPIE Proceedings, 2000
Abstract This paper addresses the equations necessary to evaluate the required samplingfrequency as a function of the ratio of amplitudes between the clock frequencies and thefrequencies that are modulated onto the respective clock frequencies. A key ingredient thatis also involved in the appropriate selection of the sampling frequency is the base ...
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Discrimination of Frequency Ratios

The Journal of the Acoustical Society of America, 1968
It is well known that our natural musical scale is built up out of tones whose frequencies are related by simple whole numbers. A sequence of tones in this scale seems to sound “natural,” while sequences of tones whose frequencies form a more complicated ratio sound “strange” or “unnautral.” The purpose of this research was to determine experimentally ...
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An Efficient Method of Estimating the Ratio of Clock Frequency

2014 IEEE Military Communications Conference, 2014
This paper describes an efficient method of estimating the ratio of clock frequency between two clocks used at the two end nodes of a one-way path. This estimation method relies on the local time measurements on the packets in a data stream going from a source node to a sink node.
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Two-Wire Ratio-Frequency Converter

ESSCIRC '86: Twelfth European Solid-State Circuits Conference, 1986
An integrated two-wire ratio-frequency converter is presented for use as a remote signal conditioner for sensor bridges such as strain-gauges or temperature-sensing bridges. The converter has a center frequency of 10 kHz and a sensitivity of 1 Hz per 10?6 variation in relative bridge output.
J.H. Huijsing, G.A. van Rossum, M. van der Lee   +2 more
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The ratio of the Larmor frequencies of 41K and 2H

Physics Letters A, 1967
Abstract The ratio of the Larmor frequencies of 41 K and 2 H and the magnetic moment of 41 K has been determined. The value is v 41 K / v 2 H = 0.166 853 0 ± 0.000 000 8.
O. Lutz, A. Schwenk
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On the Perception of the Frequency Ratio 55:32

The Journal of the Acoustical Society of America, 1962
The fact that untrained listeners categorize the musical interval between two tones having a frequency ratio of 55:32 as being a major sixth is shown to be a most reasonable outcome on the basis of present knowledge.
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Control of Oil Whip Frequency Ratio

Journal of Basic Engineering, 1960
Experiments described in this paper show that a rotatable intermediate sleeve in a journal bearing will change the average oil film velocity and hence can be made to control oil whip frequency. This device should allow oil whip frequency control of shafts running at two or more times their critical speed.
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