1 Background and System Model 2 Deadlock Characterization Necessary Conditions Resource-Allocation Graph Methods for Handling Deadlocks 3 Deadlock Prevention (死锁预防) 4 Deadlock Avoidance (死锁避免) Safe State (安全状态) Resource-Allocation Graph Scheme Banker’s Algorithm (银行家算法) 5 Deadlock Detection (死锁检测) and Recovery

一、冷却管路的功用及形式 (一)功用 在柴油机中,燃料燃烧放出的热大约45-50%转换为有用功,25-35%要从活塞、气缸等部件散出,其余由排气带出

一、燃油简介 质量指标 (一)十六烷值 (二)密度 (三)粘度 (四)凝点、浊点、倾点 (五)机械杂质和水分 (六)热值 (七)闪点

假定Z=∞→B2=Bb2→速度三角形→Cu2→ho 实际上,Z≠∞→B2≠Bb2→Cu2,hn=?

1 I/O Hardware and I/O control methods Polling (轮询方式) Interrupts (中断方式) Direct Memory Access (DMA方式) I/O hardware summary 2 Application I/O Interface Block and Character Devices Network Devices Clocks and Timers Blocking (阻塞) and Nonblocking (非阻塞) I/O 3 Kernel I/O Subsystem I/O Scheduling Buffering (缓冲机制) Caching, Spooling & device reservation Error Handling I/O Protection Kernel Data Structures 4 Transforming I/O Requests to Hardware Operations 5 Performance

• Process Concept – Program vs process – Process in memory & PCB – Process state • Processes Operations – Process creation, program execution, process termination – UNIX example: fork(), exec*(), wait()

1 多道程序技术和程序并发执行的条件 2 Process Concept 3 Process Scheduling 4 Operation on processes 5 Interprocess Communication (进程间通信, IPC) 6 Example of IPC Systems 7 Communication in C/S Systems

• Overview of OS – Overview of Computer System: Organization & Architecture – What is an OS – OS Operation: Interrupt-driven via system call • Major OS Components – Process Management – Memory Management – Storage Management • Kernel Data Structures • Computing Environments & Open-Sourced OS

电刺激治疗仪 心脏除颤器 高频电刀 微波热疗治癌仪 射频热疗仪 超声治疗仪 体外冲击波碎石机 体外反搏装置 电化学治癌仪 远红外理疗仪

• Cortex-M3指令集简介 • 汇编语言基础 • 数据传输指令 • 数据处理指令 • 条件转移指令 • 一些有用的新指令 • 子过程 • 内积计算 • 卷积计算