1. A device that senses and stores the instantaneous value of an analog signal.

2. The method of instantaneous value comparison for source current control of unity power factor rectifier possesses advantages of simplicity as well as valid restriction for maximum switching frequency.

3. The transformation of the instantaneous value symmetry component applied, the positive sequence space vector of fault component of the voltage and current can be derived.

4. There is a problem that instantaneous value of forecasting factors does not match with accumulated precipitation forecast in explaining and application of numerical forecast products.

5. By default, each instantaneous value of CPU usage from each update is kept for the following 15 readings and is averaged with the other 14 readings before being displayed by wlmstat.

6. To solve the problems existing in conventional phasor differential criterion, this paper proposes a new criterion based on the instantaneous value of fault com ponent.

7. The tester designed can be used to measure the parameters, such as power factor, effective value of voltage and current, instantaneous value, etc.

8. Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.

9. Another is using new differential algorithm based on fault component instantaneous value.

10. This paper firstly introduced the principle of switched reluctance motor; the working principle and control of PWM converter, which uses timing and compare of instantaneous value, is described.

11. The common methods of current measurement for motor are presented, For example, instantaneous value measurement, integral measurement, etc.

12. A new control idea that the total value is primary and the instantaneous value is secondary was brought forward.