The traditional concept of environmental obligation has three shortcomings:the stipulation of obligation is too propagandistic,stress on precaution and end,lack of process control,and the elements of obligation lack of a mechanism for reciprocation to environment.

Comparison of Normal Methods for Searching Feedback Loops;

Position determination sensing system based on all-fiber interferometer with feedback loop;

The prevailing feedback loop of the ecosystem was established according to system simulation.

This paper puts forward one way of on-line measuring and closed-loop feedback controlling in high-speed cylindrical grinder machine.

Also its analysis and adapter of application operation and control method using closed-loop feedback strategy was studied.

A DC constant current power supply circuit based on current closed-loop feedback control is brought(forward) in this paper and how to design the circuit is also emphatically introduced.

This article describes the affection to the whole product,which is because of injecting a perturbation signal into feedback loop, to evaluate the stability,then by the use the frequency response analyzer equepiment gets an accurate result,and the result is used for improvement,as well as improve the products reliablity.

In this paper we discussed a feedback loop for carrier frequency offset synchronization in orthogonal frequency division multiplexing (OFDM) systems.

These clock genes and their products consist of two interlocked transcriptional/translational feedback loop, which regulate circadian rhythms of behavior and physiology in Drosophila.