The Mathematical Analysis on the Risk Management Effect of Crop Insurance Plan

As a variant index, variation has an inherent shortcoming that it can only reflect the static fluctuation of the crop. This paper makes complementary analysis about it on the basis of the comment on Miranda＇s approach of β index and goes on to analyze the β index approach under the condition of three kinds of crop insurance plans, β index approach has the advantage that it can dynamically reflect the risk transfer effect of crop insurance plan. At the same insurance level, the smaller the β index is, the better the corresponding risk transfer effect of crop insurance plan is; And vice versa.

Design and verification of a transfer path optimization method

This paper studies the transfer path planning problem for safe transfer of an aircraft on the aircraft carrier flight deck under a poor visibility condition or at night.First,we analyze the transfer path planning problem for carrier-based aircraft on the flight deck,and define the objective to be optimized and the constraints to be met.Second,to solve this problem,the mathematical support models for the flight deck,carrier aircraft entity,entity extension,entity posture,entity conflict detection,and path smoothing are established,as they provide the necessary basis for transfer path planning of the aircraft on the aircraft carrier.Third,to enable automatic transfer path planning,we design a multi-habitat parallel chaos algorithm(called KCMPSO),and use it as the optimization method for transfer path planning.Finally,we take the Kuznetsov aircraft carrier as a verification example,and conduct simulations.The simulation results show that compared with particle swarm optimization,this method can solve the transfer path planning problem for an aircraft on the aircraft carrier flight deck better.