排序方式: 共有14条查询结果,搜索用时 15 毫秒
1.
2.
基于VPC-扩展图模式,给出了Datalog线性递归程序编译式的自动生成算法,研究表明,该算法能有效导出所有复杂类型Datalog线性递归程序的编译式。 相似文献
3.
4.
5.
6.
7.
8.
建筑混凝土施工一旦出现裂缝问题,就会给项目埋下安全隐患,因此,为了提高混凝土施工质量,结合实际,首先对建筑混凝土裂缝产生的危害进行分析,其次总结影响建筑混凝土裂缝的因素,最后在分析混凝土裂缝危害以及成因的基础上,提出针对性的预防处理措施,目的在于提高混凝土施工质量促进建筑工程项目发展。 相似文献
9.
10.
The effect of cutting teeth number on the cutting force,surface roughness,tool wear rate and the cutting chip shape characteristics is systematically evaluated.A novel five teeth chaser insert(C tool)which could turn the workpiece at five cutting points simultaneously is involved in comparison with the standard triangle shaped insert(T tool),in the purpose of solving the problems of cutting heat concentration and rapid tool failures in the Inconel 718 machining process.Comparative orthogonal cutting experiments of the C tool and T tool show that the cutting depth is the significant influencing factor of the cutting forces.Meanwhile,the five cutting teeth of the C tool show the effectiveness of dispersing the cutting forces as well as improving the cutting efficiency.The feed rate is the significant factor to affect the root-mean-square surface roughness(Ra)of workpiece machined by the T tool,while the significant influencing variable of Ra for the C tool is the cutting depth due to its unique tool geometry(0° rake angle)in the axial feeding process.Moreover,due to the dispersing effect,the cutting edges on the C tool exhibits lower tool wear rate than that of the T tool under the same axial feed.The chips are regular continuous long chips for the T tool,while the irregular continuous chips with the characteristic of saw-toothed profile are obtained due to its unique 0° rake angle.The C tool shows the valid potential for effectively dispersing the cutting heat and slowing down the tool wear rate in the Inconel 718 machining process. 相似文献