–集合的等势及其性质 –重要的等势或不等势的结果 –集合的优势及其性质 –自然数与自然数集合 –集合的基数 –可数集

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