The findings of a study on the optimization of Electric Discharge Machining(EDM)procedure for processing cylindrically shaped components with graphite electrodes are presented in this paper.Tool steel 90CrSi was the m...The findings of a study on the optimization of Electric Discharge Machining(EDM)procedure for processing cylindrically shaped components with graphite electrodes are presented in this paper.Tool steel 90CrSi was the material of choice for the study’s workpiece.Additionally,the Electrode Wear Rate(EWR)was chosen as the optimization problem’s objective function.An experiment using the Taguchi design was conducted to address this issue.Additionally,experiments were created and their outcomes were analyzed using the Minitab R19 program.The impact of the input process factors on EWR was investigated,including the powder concentration,the pulse on and off times,the servo current,and the servo voltage.Additionally,the best process variables for a minimal EWR were provided.展开更多
We address a variant of the continuous knapsack problem,where capacities regarding costs of items are given into account.We prove that the problem is NP-complete although the classical continuous knapsack problem is s...We address a variant of the continuous knapsack problem,where capacities regarding costs of items are given into account.We prove that the problem is NP-complete although the classical continuous knapsack problem is solvable in linear time.For the case that there exists exactly one capacity for all items,we solve the corresponding problem in O(n log n)time,where n is the number of items.展开更多
文摘The findings of a study on the optimization of Electric Discharge Machining(EDM)procedure for processing cylindrically shaped components with graphite electrodes are presented in this paper.Tool steel 90CrSi was the material of choice for the study’s workpiece.Additionally,the Electrode Wear Rate(EWR)was chosen as the optimization problem’s objective function.An experiment using the Taguchi design was conducted to address this issue.Additionally,experiments were created and their outcomes were analyzed using the Minitab R19 program.The impact of the input process factors on EWR was investigated,including the powder concentration,the pulse on and off times,the servo current,and the servo voltage.Additionally,the best process variables for a minimal EWR were provided.
文摘We address a variant of the continuous knapsack problem,where capacities regarding costs of items are given into account.We prove that the problem is NP-complete although the classical continuous knapsack problem is solvable in linear time.For the case that there exists exactly one capacity for all items,we solve the corresponding problem in O(n log n)time,where n is the number of items.
