硬件实现RAID与软件实现RAID的比较

现在的服务器中存在多种RAID实现方式,RAID系统提供了数据冗余备份功能,能帮助预防信息丢失.本文讨论了硬件RAID和软件RAID实现的差异和性价比的权衡.并分析了对系统性能的影响,以便帮助管理员了解哪种RAID实现方式最能满足他们的需求.     

基于Intel 80321的RAID5系统性能优化

结合磁盘存储阵列的应用，实现了基于Intel 80321 I/O处理器的RAID系统。该文利用了I/O处理器应用加速单元的硬件特性，在软件方面用高效读、写高速缓存的管理策略，实现了RAID5系统性能的优化，实际运行结果表明，该性能优化能达到预期效果。     

Management of chronic habits of abnormal eye rubbing.

A review of the provocations and the consequences of chronic habits of abnormal rubbing indicates a range of possible adverse responses. Gentle rubbing may double intraocular pressure. However, the combination of tight eye closure and forceful rubbing may raise intraocular pressure to more than 10 times normal levels. The possibility that, in susceptible individuals, chronic habits of abnormal rubbing may lead to the development or progression of keratoconus has been extended to the possibility of rubbing related adverse responses in other diseases and conditions. The adverse consequences of rubbing appear to be active processes, in contrast to the apparent passive nature of any recovery from those responses. Avoidance of the possibility of permanent adverse changes is clearly preferable. However, advice to avoid rubbing may not be successfully followed. Education and counseling appear to be the foundations for helping patients to control chronic habits of abnormal rubbing. An instrument has been developed as the basis for patient education and counseling for this purpose. It is intended as a take-home document which might have relevance to other family members. The widening of the application of this form of patient education to all members of a family, and a wider range of conditions, may produce beneficial synergy with advantage to patients who may have the most to gain from controlling chronic habits of abnormal rubbing.     

基于IOP80331的虚拟磁带库硬件设计与实现

介绍了一种基于IOP80331的虚拟磁带库的硬件设计与实现.在分析虚拟磁带库硬件需求的基础上,详细阐述了基于IOP80331的虚拟磁带库控制器架构设计,处理器模块以及SCSI模块的设计实现,最后给出了挂载不同磁盘条件下的实际测试结果.     

Ln2O3/MgO催化合成增塑剂IOP的研究

采用共沉淀-焙烧法制成了LnO3／MgO(Ln=Nd，Sm，Er)担载型催化剂。该型催化剂比表面大，分散性好。在催化合成IOP中效果明显，且使Ln2O3的用量减少80％左右。     

PCI 总线控制器 IOP480 的原理和应用

IOP480是PLX公司生产的一种32位、33MHz主从式PCI总线接口芯片，它完全支持现行的PO12.2版本。文中阐述了PCI总线接口芯片IOP480的结构特点以及它的数据传输方法。指出了IOP480的应用方向，给出了它的实际应用方案。     

A review on the clad failure studies

In this paper, an attempt has been made to systematically organize the research investigations conducted on clad tube failure, so far. Before presenting the review on the clad failure studies, an introduction to different clad materials has been added, in which the effect of alloying elements on the material properties have been presented. The literature on clad failure has been broadly categorized under the headings LOCA and RIA. The failure mechanisms like creep, corrosion and pellet-clad interaction have been discussed in details. Each subsection of the review has been provided with summary table, in which the studies are arranged in the chronological order. A small section on acceptance criteria for ECCS has also been included. The last section of the review has been dedicated to the core-degradation phenomena.     

磁盘阵列控制器的设计与原型实现

大规模存储服务的需求在快速增长．冗余磁盘阵列（RAID）是今天企业级存储系统的标准解决方案．介绍了一个基于Intel 80321平台的RAID控制器的设计．在目标板上运行了嵌入式Linux系统，并实现了基于x86平台的原型系统．以光纤通道接口连接主机．性能测试显示RAID-5的读、写数据传输率分别达到185MB／s和141MB／s．     

进口意大利设备中的PC控制

介绍了PC的程序流程、各功能程序的运行过程及调试运行中应注意的问题。