一种基于硬件的U盘隔离方法的设计与实现

U盘的普及使U盘病毒繁衍迅速,针对信息系统安全保护的需要,设计出一种U盘病毒隔离器。该隔离器具有隔离Autorun病毒、防止PC的数据通过U盘泄密、防止PC中的病毒感染U盘的功能。隔离器能够快速捕获到U盘与主机之间所有底层数据,在此基础上,隔离器中的微控制器（MCU）通过分析、审计和过滤流过隔离器中的底层数据来实现上述功能。经实际检测,该设计能够实现预定功能。     

在μC/OS-II中文件系统的分析与建立

μC/OS-II是当今一种十分流行的嵌入式操作系统。由于其具有执行效率高、占用空间小、实时性能优良和可扩展性强等特点,因此被广泛应用于工业控制领域。该文对文件系统进行了简单的介绍,结合嵌入式系统应用中的实际情况,建立起一套简单的文件系统。     

基于Linux的用户态文件系统的设计

介绍了一种基于Linux的用户态文件系统的设计,它采用了内核模块与用户态服务程序相结合的设计思想.用户态文件系统可以增加文件系统实现的灵活性,易于二次开发.详细描述了用户态文件系统的设计,并给出应用实例和适用范围.     

办公电脑的维护技术探究

从提供工作效率和工作质量,降低电脑的故障率,延长电脑的使用寿命的角度出发,文中阐述了正确使用电脑的方法,重点阐述了维护与保养电脑方面的实用方法和技术措施。     

商品软件试用版的发布一法

试用版的使用可通过设置有效日期或使用次数来控制，前者较简单，文中以Visual Basic6.0为例主要说明了后者的实现：建立包含检测使用次数代码的工程，编译工程并打包发布。     

HERMES: embedded file system design for A/V application

Embedded systems such as PVR, set-top box, HDTV put unique demand on I/O subsystem design. Underlying software, particularly file system, needs to be elaborately designed so that it can meet tight constraints of consumer electronics platform: performance, price, reliability, and etc. In this work, we develop state-of-art file system elaborately tailored for A/V workload. There are two design objectives in our file system: performance and support for logical level abstraction. For performance, we develop a number of novel features: extent based allocation, single level file structure with block index augmentation scheme, aggressive free block allocation to minimize disk fragmentation, elaborate file system meta data layout, separation of name space data and file data and etc. HERMES enables the user to view file as a collection of semantic units (frame or audio samples). HERMES file system encompasses most of state-of-the-art file system technologies published in preceding works. Via extensive physical experiment, we verify that HERMES file system successfully addresses the original issues: good scalability, predictable I/O latency (minimizing variability in I/O latency), efficient disk head movement and etc. This is the result of harmonious effort of large I/O size, aggressive free block allocation algorithm, data block placement strategy, file organization, layout of HERMES file system and etc. The result of performance experiments indicate that HERMES file system prototype successfully meets the file system constraints for high volume and high bandwidth multimedia application. HERMES file system exhibits superior performance to EXT2 file system (Linux) and XFS file system (SGI).

基于Web的学位论文管理系统的设计与实现

应用ASP技术设计和实现了基于Web的学位论文管理系统,重点描述了支持中文的文件上传下载控件、邮件发送控件及权限控制的设计技巧。     

Linux系统教学中关于命名管道文件的解析

针对Linux系统相关内容教学中对于命名管道文件讲述不够详细,导致学生对命名管道文件认识模糊的问题,基于Linux系统进程之间通信机制,讲述了进程之间通过管道通信的原理、无名管道和命名管道的功能,并通过实例说明了命令方式和程序方式使用命名管道的方法。     

电信历史话单查询的文件系统实现方案

分析了电信业用户历史话单查询的特点,提供了一种组织历史话单数据到文件系统的合理方法,通过对文件查询来实现高效、高并发查询的方案.     

Interest-Intended Piece Selection in BitTorrent-like peer-to-peer file sharing systems

BitTorrent is a popular peer-to-peer file sharing system and a target file shared through BitTorrent is partitioned into pieces and downloaded from multiple peers in parallel in order to shorten the download process. However, due to peer dynamics in P2P networks, rare pieces may be lost and thus lead to the so-called last piece problem. BitTorrent employs rarest-first piece selection algorithm to deal with this problem, but its efficacy is limited because each peer only has a local view of piece rareness. In this paper, we propose an Interest-Intended Piece Selection (IIPS) algorithm aiming at better alleviating the last piece problem while maintaining stable cooperation between peers. IIPS is named interest intended in that every IIPS peer favors pieces that, if downloaded, would increase the probability of being interesting to its cooperating peers. Simulation results show that IIPS achieves less occurrences of piece loss under tough conditions and slightly outperforms the BitTorrent’s rarest-first algorithm in terms of higher piece diversity.