小型薄板类零件加工工艺研究

小型薄板类零件是工业中经常使用的零件,但是其刚性差、强度低、装夹易变形、加工效率低下。针对车间某一典型小型薄板类零件,对传统工艺进行分析,对工艺进行改进,在毛坯选择、加工思路、工件装夹等多个方面都进行了创新。经过实践证明,该加工工艺在工时的降低、工人劳动强度的减小、合格率的提高等多个方面都取得了很好的效果,大大降低了工件的综合成本。

Efficient SIMD optimization for media processors

Single instruction multiple data （SIMD） instructions are often implemented in modem media processors. Although SIMD instructions are useful in multimedia applications, most compilers do not have good support for SIMD instructions. This paper focuses on SIMD instructions generation for media processors. We present an efficient code optimization approach that is integrated into a retargetable C compiler. SIMD instructions are generated by finding and combining the same operations in programs. Experimental results for the UltraSPARC VIS instruction set show that a speedup factor up to 2.639 is obtained.