Noise is additional\unwanted \signal that interferes with the transmitted signal Generated by electronic devices The noise is a random process Each\sample \ of n(tis a random variable Typically, the noise process is modeled as\Additive White Gaussian noise”(AWGN) White: Flat frequency spectrur Gaussian noise distribution

The signal suffers an attenuation loss l Received power PR= PT/L Received snr=E,/No, Eb=Pr/Rb Antennas are used to compensate for attenuation loss Capture as much of the signal as possible

Sampling Sampling provides a discrete-time representation of a continuous waveform Sample points are real-valued numbers In order to transmit over a digital system we must first convert into discrete valued numbers

Information content of a random variable Random variable x Outcome of a random experiment Discrete R V takes on values from a finite set of possible outcomes PMF: P(X=y)=Py) How much information is contained in the event X=y? Will the sun rise today Revealing the outcome of this experiment provides no information Will the Celtics win the NBa championship? Since this is unlikely, revealing yes provides more information than revealing Events that are less likely contain more information than likely events

第二章流体的PVT关系 一、P、V、T、C是流体的最基本性质,是热力 二、PV数据的计算

2流体的P-V-T关系 2.1纯物质的P-V-T关系 2.2气体的状态方程 2.3对比态原理及其应用 2.4真实气体混合物的P-V-T关系 2.5液体的P-VT性质

7相平衡 7.1相平衡的判据与相律 7.2汽液平衡相图 7.3汽液平衡计算

5化工过程的能量分析 5.1能量平衡方程 5.2热功间的转换 5.3熵函数 5.4理想功、损失功和热力学效率 5.5有效能

3流体的热力学性质 3.1概述 33热力学性质间的关系 3.3热容 3.4热力学性质的计算 3.5逸度与逸度系数 3.6两相系统的热力学性质及热力学图表

“建筑设备工程”是一门专业技术课。学习 本课程的目的在于掌握建筑设备的基本知识, 了解各种建筑设备的工作原理、各种设备系统 的特点和工程设计计算的有关知识