aperture efficiency
1.Two optimization methods,Golden section and Fibonacci series,are employed to deal with this optimization model according to features of practical SAR(Synthetic Aperture Radar) systems. Efficiency of the contrast optimization algorithm is greatly improved compared with the quondam methods due to the application of the model and the two methods which are mentioned above.
2.Focusing the laser beam into a 9 mm long BBO crystal, the second harmonic of 1. 2 W was generated with conversion efficiency of 13%. When the filtering aperture was removed, the conversion efficiency fell down to 8 %.
3.Figure 5. Transfer efficiency of a solder paste related to aperture area ratio and its effect on reflowed bump co-planarity.
4.A new type of actuate mechanism for the active reflector of FAST(five-hundredmeter aperture spherical telescope) radio telescope was proposed so that one can overcome the deficiency of original actuate mechanism. The mechanism was utilized to prevent from the sideslip in the margin cell of the active reflector,and to promote the mechanical efficiency and reliability,and to reduce the cost of manufacture and operate.
5.According to introducing, bringing about the main reason with average day unqualified efficiency is partial enterprise unreasonable on products plan, the too big, quantity that contain water passes aperture area small; Or to reduce cost, add bassoon span of purpose, reduce vacuum tube amount.
