摘要：The rapid developm.nt in the digital circuit design enhances the applications on very large scale integration era. Encoders are one am.ng the digital circuits found in all com.unication system.. The polar encoding is m.inly m.ant for its channel achieving property. It finds its application in com.unications, sensing and inform.tion theory. This coding proposed by Erdal Arikan is significant because of its zero error floors and sim.le architecture for hardware im.lem.ntation. In this paper, a folded polar encoder is designed to start from.the fully parallel architecture and proceeds with its data flow graph, delay requirem.nt calculation, lifetim. analysis and register allocation, which results in a very large scale integration architecture with m.nim.m.hardware utilization. The results are sim.lated for 4 and 8 parallel folded 32-bit polar encoder using Xilinx 14.6 ISIm.and im.lem.nted in Virtex 5 field program.able gate array. A com.arison is m.de on fully parallel and various folding techniques based on their resource utilization.

摘要：针对各个行业污染物排放的环保法规日益严格，促使研究人员尝试开发环境友好的技术。在制革工业中，常规的铬鞣工序排放出了大量的铬、总溶解固体和氯化物。因此，制革者一直在寻找产品加工的新方法，实现低污染物排放和高吸收铬鞣的目的。本文开发了一种高分子合成鞣剂，通过它，能够使用碱式硫酸铬商业产品进行不浸酸铬鞣。针对山羊皮和母牛皮，本文设计了一种简便的鞣制工艺，这种方法可以将铬的吸收率提高至90％以上。尽管这种工艺是一个高反应性的体系，但是，从显微分析可以看出，鞣制的革中没有铬的物理沉积。铬在厚奶牛皮内的分布是均匀的，与常规方法鞣制的革差不多，即使是在减少用量的情况下，也是如此。此外，这种新颖的产品加工方法可以将鞣制废液中的化学需氧量（COD）、总溶解固体（TDS）和氯化物分别减少50％、80％和98％。该工艺生产的皮革丰满、柔软，其收缩温度与常规的铬鞣革差不多。这种综合的生产工艺减少了化工材料、水、时间和能量的消耗。因此，本文开发的这种新型的产品加工工艺不仅具有减少污染负荷的优势，而且在技术经济上也是可行的。