利用微型电子计算机对一千多个谷子优选样品的维生素 E 含量进行了处理。找出了数据的最大值和最小值,以及两者之差-极限变幅;还找出了常见(去掉大的和小的各百分二十后,余下的中间大小数据的)最大值,最小值和两者之差-常见变幅值,以及...利用微型电子计算机对一千多个谷子优选样品的维生素 E 含量进行了处理。找出了数据的最大值和最小值,以及两者之差-极限变幅;还找出了常见(去掉大的和小的各百分二十后,余下的中间大小数据的)最大值,最小值和两者之差-常见变幅值,以及常见平均值等。数据处理程序为:展开更多
A new file assignment strategy of parallel I/O, which is named heuristic file sorted assignment algorithm was proposed on cluster computing system. Based on the load balancing, it assigns the files to the same disk ac...A new file assignment strategy of parallel I/O, which is named heuristic file sorted assignment algorithm was proposed on cluster computing system. Based on the load balancing, it assigns the files to the same disk according to the similar service time. Firstly, the files were sorted and stored at the set I in descending order in terms of their service time, then one disk of cluster node was selected randomly when the files were to be assigned, and at last the continuous files were taken orderly from the set I to the disk until the disk reached its load maximum. The experimental results show that the new strategy improves the performance by 20.2% when the load of the system is light and by 31.6% when the load is heavy. And the higher the data access rate, the more evident the improvement of the performance obtained by the heuristic file sorted assignment algorithm.展开更多
文摘A new file assignment strategy of parallel I/O, which is named heuristic file sorted assignment algorithm was proposed on cluster computing system. Based on the load balancing, it assigns the files to the same disk according to the similar service time. Firstly, the files were sorted and stored at the set I in descending order in terms of their service time, then one disk of cluster node was selected randomly when the files were to be assigned, and at last the continuous files were taken orderly from the set I to the disk until the disk reached its load maximum. The experimental results show that the new strategy improves the performance by 20.2% when the load of the system is light and by 31.6% when the load is heavy. And the higher the data access rate, the more evident the improvement of the performance obtained by the heuristic file sorted assignment algorithm.
