But as quantum physicists and bird watchers know, you can't look too closely without being a disturbance; the small electric current between the tip of the STM probe and the sample surface can dislodge weakly bound atoms, freeing them to bounce away.
Without such a disturbance, the birds would probably have remained in their roost.
The figure portrays the expression levels of a gene over time, in the situation without and with a disturbance.
This example shows that in contrast to the feedback system, which reacts to a change in the controlled variable (reactive control, correction), the feedforward system responds to a disturbance without having the controlled variable being affected first (proactive control, avoidance).
Compared with other control strategies, the proposed control strategy takes better advantage of the response characteristics of different types of DSRs and has a better smoothing control effect without a "secondary disturbance" of the load power.
In the infiltrative growth pattern, the carcinoma cells invade between pre-existing structures without a significant disturbance of the tissue architecture.
Based on the internal model principle, a disturbance compensator is constructed such that the system with external sinusoidal disturbances is transformed into an augmented system without disturbances.
Dementia is a gradual and progressive loss of intellectual abilities such as thinking, remembering, paying attention, judging, and perceiving, without an accompanying disturbance of consciousness.
Since looper disturbances have a deterministic nature, and their accurate modelling is a challenge that is not easily addressed, the problem represents a case in which a variance controller has to be designed without an explicit disturbance model.
