7.1 有序对与笛卡儿积 7.2 二元关系 7.3 关系的运算 7.4 关系的性质 7.5 关系的闭包 7.6 等价关系与划分 7.7 偏序关系

5.1 一阶逻辑等值式与置换规则 5.2 一阶逻辑前束范式 5.3 一阶逻辑的推理理论

–推理的形式结构 –自然推理系统P

哈尔滨理工大学：《离散数学 Discrete Mathematics》课程教学资源（PPT课件讲稿）00 离散数学概述（谢志强、刘丕娥、陈海龙）

The output y[n] of a frequency-selective LTI discrete-time system with a frequency response exhibits some delay relative to the input x[n] caused by the nonzero phase response of the system

1. Continuous-time system 2. Discrete-time system

一、承载信息的函数 二、模拟信号是连续的(continuous)，数字信号是离散的(discrete)

Time-Domain Representation Signals are represented as sequences of numbers, called samples Sample value of a typical signal or sequence denoted as x[n] with n being an integer in the range x[n] defined only for integer values of n and undefined for non-integer values of n

Some disorders result when a mutation causes the product of a single gene to be altered or missing. These disorders are inherited in simple patterns similar to or identical with those described by Mendel for certain discrete characteristics in garden peas. Therefore, it’s also called Mendelian diseases

离散数学是计算机出现以后迅速发展起 来的一门数学分支。计算机科学就是算 法的科学，而计算机所处理的对象是离 散的数据，所以离散对象的处理就成了 计算机科学的核心，而研究离散对象的 科学恰恰就是离散数学