In error recovery , the passing of control from a recovery routine to a higher - level recovery routine along a preestablished path 在差錯恢復技術中,控制權沿預定路線從某個恢復例行程序傳遞給高一級的恢復例行程序的過程或處理方法。
The first one : fitting together ultimate values of every dimensions in one dimension - chain one by one , educing many equations by itself , calculating results , and comparing these results of close dimension to find maximal and minimal values . the second one : projecting all dimensions on two preestablished axis , then providing the solutions to analyze whether every projected dimensions is increscent or decreasing , and synthesize the effect of every projected dimensions to close dimension , educing many equations by itself , at last calculating the result of close dimension . the third one : according to monte carlo analysis , getting every dimensions " values from every dimensions " tolerances at random time after time , simulating the actual circumstances of mass production using these dimensions , and calculating reasonable results of close dimension economically 鑒于這類系統(tǒng)在各大中小型企業(yè)的廣泛應用與相對滯后的研究水平,本文提出了三種新的能切實地解決目前尺寸鏈計算機輔助分析解算中存在的各種難題的設計方案,第一種方案將尺寸鏈中各組成環(huán)能取的極值組合起來,自動列方程組,求解每個組合情況下的封閉環(huán)尺寸,最后比較這些結果,得出封閉環(huán)的最大最小值;第二種方案將尺寸鏈各組成環(huán)向預先設定好的兩個方向投影,之后再分析各尺寸環(huán)投影分量的增減性,并且提供了組成環(huán)兩個方向上的投影分量增減性不一的復雜情況下的解決辦法,綜合組成環(huán)各投影分量的增減性,然后自動列出方程組,最后根據(jù)各組成環(huán)的投影分量以及所列的方程組來確定尺寸鏈封閉環(huán)的尺寸;第三種方案以蒙特卡洛法為原理,在尺寸鏈各組成環(huán)的取值范圍內使用計算機產(chǎn)生大量隨機數(shù),模擬實際大批量生產(chǎn)中的零件尺寸分布情況,以更經(jīng)濟更合理的方式分析、計算封閉環(huán)尺寸。