说明：  背包问题，用PSO解背包a=[95 4 60 32 23 72 80 62 65 46] 物品的体积 c=[55 10 47 5 4 50 8 61 85 87] 物品的价值 b=269 背包的重量限制
(Knapsack problem, PSO solutions backpack a = [95 4 60 32 23 72 80 62 65 46] the volume of goods c = 55 10 47 5 4 50 8 61 85 87] b = 269 value of the items backpack weight limit)