- time, energy, frequency
- Computers: TEF
Универсальный русско-английский словарь. Академик.ру. 2011.
time, energy, frequency
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Time in physics — In physics, the treatment of time is a central issue. It has been treated as a question of geometry. One can measure time and treat it as a geometrical dimension, such as length, and perform mathematical operations on it. It is a scalar quantity… … Wikipedia
Frequency domain — In electronics, control systems engineering, and statistics, frequency domain is a term used to describe the domain for analysis of mathematical functions or signals with respect to frequency, rather than time.[1] Speaking non technically, a time … Wikipedia
Frequency — For other uses, see Frequency (disambiguation). Three cyclically flashing lights, from lowest frequency (top) to highest frequency (bottom). f is the frequency in hertz (Hz), meaning the number of cycles per second. T is the period in seconds (s) … Wikipedia
Time-frequency representation — A time frequency representation (TFR) is a view of a signal (taken to be a function of time) represented over both time and frequency. Time frequency analysis means analysis of a TFR. TFRs are often complex valued fields over time and frequency,… … Wikipedia
Energy harvesting — (also known as Power harvesting or energy scavenging ) is the process by which energy is captured and stored. Frequently this term is applied when speaking about small autonomous devices, like those used in sensor networks. A variety of different … Wikipedia
Energy FM (Malta) — Energy FM is a community radio station located in Birzebbuga, Malta. It transmits in stereo at a frequency of 96.4 MHz.The radio station plays the best of contemporary music and the most popular singles that were released in the past forty years … Wikipedia
Energy monitoring and targeting — (M T) is an energy efficiency technique based on the standard management axiom stating that “you cannot manage what you cannot measure”. M T techniques provide Energy Managers with feedback on operating practices, results of energy management… … Wikipedia
Time-Domain Thermoreflectance — is a method by which the thermal properties of a material can be measured, most importantly thermal conductivity. This method can be applied most notably to thin film materials (up to hundreds of nanometers thick), which have properties that vary … Wikipedia
Energy quality — the contrast between different forms of energy, the different trophic levels in ecological systems and the propensity of energy to convert from one form to another. The concept refers to our empirical experience of the characteristics, or qualia … Wikipedia
Energy intensity — is a measure of the energy efficiency of a nation s economy. It is calculated as units of energy per unit of GDP.* High energy intensities indicate a high price or cost of converting energy into GDP. * Low energy intensity indicates a lower price … Wikipedia
Time Reversal Signal Processing — is a technique for focusing waves. A Time Reversal Mirror (TRM) is a device that can focus waves using the time reversal method. TRMs are also known as time reversal mirror arrays, as they are usually arrays of transducers, but they do not have… … Wikipedia
