人教版高中物理必修2第六章 万有引力与航天1. 行星的运动导学案(1)

人教版高中物理必修2第六章 万有引力与航天1. 行星的运动习题(4)

人教版高中物理必修2第六章 万有引力与航天1. 行星的运动习题(2)

人教版高中物理必修2第六章 万有引力与航天1. 行星的运动习题(1)

Term Project Final presentation Isual aids available on-campus Computer projection Document camera

Objectives Review the format and expectations for the final exam Review material needed to succeed on the final exam Set the material from the course in the context of the product realization process Answer questions

Final exam Very good performance overall Essays were particularly good ·Mean-88.5%0 Standard deviation -5.7%

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

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

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