简介:注塑机料筒温度是注塑工艺的重要参数,对料筒温度进行有效地控制是保证塑料制品成型质量的重要环节。料筒温度系统是一个多变量、离散、间歇工作、大滞后、非线性、强耦合且需要人工参与的复杂系统。本文采用模糊变系数PID控制,用模糊规则对模糊变系数PID算法中的系数进行在线修正。结果表明该算法提高了温度控制系统的鲁棒性,超调减小,提高了注塑机料筒温度控制的精度。
简介:约束传播算法是求解约束满足问题的一种重要方法.调度问题是一种特殊的约束满足问题.本文介绍了调度问题中的Edge-Finding和Energy-Reasoning两种分离约束传播算法,并对它们进行了比较,文中最后给出了一种结合Energy-Reasoning的Edge-Finding改进算法.
简介:摘要:针对处于人生发展时期的大学生。学校一直以来都是大学生获取知识、 提高素质的主要场所,对当代大学生进行性教育必须充分发挥学校的主阵地作用。性教育模式有很多种,包括课堂教育模式、校园文化模式、同伴教育模式、心理咨询模式、网络教育模式等。各种模式各有利弊、如何根据高校学生的自身特点、选择适合的性教育模式显得尤为重要。Absrtact:For college students in the period of life development. Schools have always been the main places for college students to acquire knowledge and improve their quality. To carry out sex education for contemporary college students, we must give full play to the role of schools as the main front. There are many modes of sex education, including classroom education mode, campus culture mode, peer education mode, psychological consultation mode, network education mode, etc. Each mode has its own advantages and disadvantages. It is particularly important to choose a suitable education mode according to the characteristics of college students.