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TD-2 was a microwave relay system developed by Bell Labs and used by AT&T to build a cross-country network of repeaters for telephone and television transmission. The same system was also used to build the Canadian Trans-Canada Skyway system by Bell Canada , and later, many other companies in many countries to build similar networks for both ...
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TD-2 was a microwave relay that carried long-distance telephone in the US and Canada. TD2 or TD-2 may also refer to: Taepodong-2, North Korean space launcher technology; TD-2 RNA motif, a conserved RNA structure and metagenome sequences; Yamaha TD2, motorcycle model
The formal foundation of TDDFT is the Runge–Gross (RG) theorem (1984) [1] – the time-dependent analogue of the Hohenberg–Kohn (HK) theorem (1964). [2] The RG theorem shows that, for a given initial wavefunction, there is a unique mapping between the time-dependent external potential of a system and its time-dependent density.
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Since individual harmonic amplitudes are measured, it is required that the manufacturer disclose the test signal frequency range, level and gain conditions, and number of measurements taken. It is possible to measure the full 20 Hz–20 kHz range using a sweep (though distortion for a fundamental above 10 kHz is inaudible).