instantaneous description

英 [ˌɪnstənˈteɪniəs dɪˈskrɪpʃn]

美 [ˌɪnstənˈteɪniəs dɪˈskrɪpʃn]

网络瞬时描述; 瞬间描述

A signal is first decomposed into often finite IMFs by the EMD, and then, with the Hilbert transform, the meaning instantaneous frequencies of every IMF is obtained which give precise description of the varying frequency.
通过EMD，将信号分解成IMF（一般为有限数目）的和，对每个IMF进行Hilbert变换就可以获得有意义的瞬时频率，从而给出频率变化的精确表达。
Broad-sense Transformer Model of Instantaneous Power Theory and Its Uniform Mathematical Description with Conventional Power Theory
瞬时功率理论的广义变压器模型及其与传统功率理论的统一数学描述
The measurement of the instantaneous freqency ( IF) of a time-varying signal is of importance to many applications such as seismic, radar, sonar, communication and biomedicine because the IF gives a good description of some physical phenomenon.
时变信号瞬时频率的测量有许多重要的应用。例如，在地震勘探、雷达、声纳、通信、生物医学中，瞬时频率是一些物理现象的很好描述。