Performance Of System Structure Research Articles

Optical Fiber Dispersion Compensation Based on Optic System

In the optical fiber communication system of high-speed and large capacity, the dispersion is one of the main technical indicators. The dispersion causes the light pulse broadening, so it leads to the distortion of signal transmission and BER (bit error rate). The main research is the single-mode optical fiber dispersion compensation. The design and performance of system structure on the dispersion compensation fiber communication system is accomplished by using of the optic system optical fiber communication system simulation. Through the analysis of system structure and the research of the performance of the key components of the system, the output signal waveform is simulated and the influence of the output signal waveform by the system structure and key components performance of the receiving end is compared. The design can reduce the system dispersion.

Safety Topics

ABOUT two years ago proposals were issued concerning improved seat standards and dynamic evaluation of transport aircraft seats. The FAA has now issued the final rule based on these proposals and has also taken into account the wide interest shown and comments received from aircraft and seat manufacturers, operators, flightcrew organizations and from US and foreign government agencies. It was proposed to upgrade the static load factors in the upward, downward and sideward direction (which had been unchanged for many years) and add an aft direction requirement. The adoption of a new dynamic test standard was also proposed which would require the demonstration of both occupant response and seat/‐restraint system structural performance. These requirements would apply only to future transport category aircraft and several comments received indicate that they should also apply to current aircraft. This will be the subject of future rulemaking procedures.