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On the base of the assumption that the recycled quantity of used products is affected by the interaction of recycling price and sales volume, this paper researches closed-loop supply chain's pricing and coordination, gives system members' optimal pricing and profits in decentralized decision and centralized decision and finds that reverse supply chain itself is in coordination and traditional forward supply chain is in incoordiantion under decentralized decision. Then it designs a revenue sharing contract which can coordinate closed-loop supply chain. At last, a numerical example is given to verify the conclusions drew in this paper.

An integrated beam synthesis algorithm is presented to optimize the multiple beams of variable look-angle SAR antenna. With an iterative solution scheme of improved projection matrix algorithm, the amplitude excitations (common to all beams) and the phase of such excitations (corresponding to each radiated beam) are determined simultaneously. Antenna beams are controlled by phase only in SAR system. The sample application of multiple beams SAR antenna design is given to illustrate the effectiveness of the presented algorithm. And the noise-equivalent sigma-zero (NEσ0) of SAR system is improved as well.