信号与系统pdf电子书，Signals and Systems fall 2003 electronic books newsgroup,content include Assignments,Exams,Lecture Notes,Recitations etc.

美国麻省理工大学《Space Systems Engineering（航天系统工程）》pdf英文电子教案。

这是今年新出现的一本量子力学电子书，适合于初学者。 Part 1 OPENING REMARKS Greetings Opening Lecture Marc Henneaux Part 2 CONTRIBUTED PAPERS On the Symmetries of Classical String Theory Constantin P. Bachas Eddington–Born–Infeld Action and the Dark Side of General Relativity M´aximo Ba˜nados Light-Cone Field Theory, Maximal Supersymmetric Theories and E7（7） in Light-Cone Superspace Lars Brink Strongly Hyperbolic Extensions of the ADM Hamiltonian J. David Brown Black Hole Entropy and the Problem of Universality S. Carlip Sources for Chern–Simons Theories Jos´e D. Edelstein and Jorge Zanelli The Emergence of Fermions and the E11 Content Franc¸ois Englert and Laurent Houart v vi Contents Why Does the Universe Inflate? S.W. Hawking Kac–Moody Algebras and the Structure of Cosmological Singularities： A New Light on the Belinskii–Khalatnikov–Lifshitz Analysis Marc Henneaux Black Holes with a Conformally Coupled Scalar Field Cristi´an Mart´ınez Quantum Mechanics on Some Supermanifolds Luca Mezincescu John Wheeler’s Quest for Beauty and Simplicity Charles W. Misner Magnetic Monopoles in Electromagnetism and Gravity Rub´en Portugue´s The Census Taker’s Hat Leonard Susskind Static Wormholes in Vacuum and Gravity in Diverse Dimensions Part 3 CLOSING Claudio Bunster： A Personal Recollection Profile of Claudio Bunster

《Feedback Control Systems（反馈控制系统）》（英文版）pdf电子教案，内容完整，知识点丰富，讲解详细。

麻省理工大学生物系列《Systems Biology》电子教案，主要介绍生物学体系。

◆2.1 Discrete-Time Signals: Sequences ◆High and Low Frequencies in Discrete-time signal ◆2.2 Discrete-Time Systems ◆Memoryless (memory); Linear; Time-Invariant; Causality; Stability(BIBO) ◆2.3 Linear Time-Invariant (LTI) Systems ◆LTI Systems:Convolution( 系统适用吗?) ◆2.4 Properties of LTI Systems ◆Stability and Causality of LTI systems;FIR and IIR systems ◆2.5 Linear Constant-Coefficient Difference Equations ◆The output for a given input is not uniquely specified. Auxiliary conditions are required; initial-rest conditions ◆2.6 Frequency-Domain Representation of Discrete￾Time Signals and systems ◆ Eigenfunction and Eigenvalue for LTI systems ◆2.7 Representation of Sequences by Fourier Transforms ◆2.8 Symmetry Properties of the Fourier Transform ◆2.9 Fourier Transform Theorems ◆2.10 Discrete-Time Random Signals

1、What is an operating system?什么是操作系统? 2、Simple Batch Systems简单批处理系统 3、Multiprogramming Batched Systems多道程序批处理系统 4、ime- Sharing Systems分时系统 5、Personal-Computer- Systems个人计算机系统 6、Parallel Systems并行系统 7、Distributed Systems分布式系统 8、Real-Time Systems实时系统

96.1 Introduction 96.2 Types of Operating Systems 96.3 Distributed Computing Systems 96.4 Fault-Tolerant Systems 96.5 Parallel Processing 96.6 Real-Time Systems 96.7 Operating System Structure 96.8 Industry Standards 96.9 Conclusions

◆5.0 Introduction ◆5.1 Frequency Response of LTI Systems ◆5.2 System Functions For Systems Characterized by Linear Constant-coefficient Difference equation ◆5.3 Frequency Response for Rational System Functions ◆5.4 Relationship Between Magnitude and Phase ◆5.5 All-Pass System ◆5.6 Minimum-Phase Systems ◆5.7 Linear Systems with Generalized Linear Phase

◆2.1 Discrete-Time Signals: Sequences ◆2.2 Discrete-Time Systems ◆2.3 Linear Time-Invariant (LTI) Systems ◆2.4 Properties of LTI Systems ◆2.5 Linear Constant-Coefficient Difference Equations ◆2.6 Frequency-Domain Representation of Discrete￾Time Signals and systems ◆2.7 Representation of Sequences by Fourier Transforms ◆2.8 Symmetry Properties of the Fourier Transform ◆2.9 Fourier Transform Theorems ◆2.10 Discrete-Time Random Signals