硬盘机在消费电子产品中的应用

随着消费电子产品数字化与网络化的快速进展,硬盘机在这个产品领域的应用正在扩展之中。从最初的个人录像机到现今的高级机顶盒等等,硬盘机的应用极大地丰富了这类产品的功能,并在一定程度上改变了人们享受节目内容的方式。     

Intrusion detection and tolerance: A global scheme

Protecting implemented security mechanisms and trusting their output (e.g. log files) when the host, under which they are deployed, is compromised, is among the major challenges that have to be faced. To fulfil this need, recent advances in security have considered the design of storage-based intrusion detection system, which detect intrusions by looking at the low-level disk requests patterns. However, these systems neither tolerate intrusions, nor do they distinguish whether the disk requests are generated by legitimate or malicious processes; and consequently, they generate a lot of false negative and positive alerts. In this paper, we present a Cooperative Intrusion Detection and Tolerance System, called CIDTS, which takes advantage of the information that are available at the network, host operating system, and storage level to better detect intrusion attempts in their early stages, even when the host is compromised. To allow cooperation, the disk communication interface that transports requests between the storage level and the host level is extended to forward information about the processes that generate the request. The paper also provides intrusion tolerance capabilities and provides techniques to support investigation activities. Copyright © 2007 John Wiley & Sons, Ltd.     

基于存储型媒资的制播一体网设计与建设

结合株洲广播电视总台基于存储型媒资的制播一体网系统的设计、应用实践,分析了制播一体网系统设计时考虑的一些要素,包括设计目标、原则、架构等,并对系统中的非线性新闻制播系统、卫星收录系统、媒资系统、演播室等子系统的组成、功能和工作流程进行介绍。最后简单介绍制播一体网在本台的建设应用情况。     

储能型风电场作为黑启动电源时电池储能系统的配置方法

通过为风电场配置储能系统,使其作为电网的黑启动电源,对于提高电网在故障后的恢复速度具有重要作用.以呼伦贝尔电网为研究对象,提出一种为其大良风电场配置电池储能系统的方法,以能够启动附近电厂的热电机组.首先,依据仿真所得储能系统有功输出数据,对电池模块额定容量的极限进行配置,进一步考虑初始荷电状态范围的影响,以配置电池模块容量的成本最小化、初始荷电状态范围最大化为目标,采用线性加权和法构建电池模块额定容量的双目标优化模型,以求解最优额定容量;其次,根据储能系统有功和无功功率输出最大值,确定电池模块的最大充放电功率和逆变器容量;最后,通过仿真表明,所提配置方法能有效降低储能系统的配置成本.     

储能型风电场作为局域电网黑启动电源的可行性探讨

针对局域电网所处特殊地理位置和需求,寻找和建设可以作为其黑启动电源的新型电源,对于提高电网在故障后的恢复速度具有重要作用。文中以蒙东呼伦贝尔地区电网为例,提出了通过为其大良风电场配置大容量电池储能系统,并利用该储能型风电场带动附近东海拉尔电厂热电机组进行启动的方案。根据历史风速数据,对大良风电场的持续有效出力概率进行了评估。针对大良风电场具有最大持续有效出力概率时的情况,采用方案中所提策略对储能型风电场的自启动、储能型风电场对变压器和输电线路空载充电、储能型风电场带动热电机组辅机启动等暂态过程进行了仿真。最后,根据仿真结果,探讨分析了所提方案的可行性及需进一步研究解决的技术问题。     

Performance assessment of storage policies of the Vaigai Reservoir using a simulation model

A comprehensive simulation model was used to assess the performance of the storage-based operating policies of the Vaigai Reservoir system, Tamil Nadu, India. The model first used historical inflow data, and then inflow data generated through an artificial neural network (ANN) model. The modelled releases were then compared with the actual ones. It was found that the existing storage-based policies were violated within the year but not on an annual basis, except in the recent past, when annual deficits occurred due to inadequate water availability from the upstream reservoir.     

检查存储变动的入侵检测技术研究

大部分的入侵行为都会引起被入侵主机的存储变动，因此检查存储变动是一种有效的入侵检测方法。校验和方法与基于存储的入侵检测技术是两种重要的检查存储变动的入侵检测技术。综述和比较了这两种技术。