Through the study, it is found that, these three theories have their advantages and disadvantages, but combining the three theories, it is concluded that people have primitive desires, some bad ones are suppressed through education and etiqu...

卡夫卡的《变形记》主要描写了主人公格里高尔变形成一只丑陋的甲虫后生活所发生的变化，借人形的异化写人性的异化，揭示了人与人之间以金钱利益为纽带的情感关系。变形前的格...

在轧钢生产中工艺设计压下规程优化可以实现优质、高产、低消耗的目的。合理确定压下规程可以使初轧坯所形成的“鱼尾”最小，因而使切损最少，使得成坯率提高[1]；在中厚板轧制...

传统的电动压下机构已不能满足现代轧制工艺要求。与电动压下机构相比，液压压下机构：快速响应性好，调整精度高；过载保护简单可靠；较机械传动效率高；便于快速换辊，提高轧...