在操作系统中实现处理机进程和存储进程的分离

通过为进程分配和回收处理机资源和存储器资源，传统操作系统实施对处理机和存储器的管理和控制，在多处理机操作系统中，当处理机和存储器之间的互连方式比较复杂时，仅仅构造唯一一种进程抽象，不能很好地实施对处理机资源和存储器资源的管理，基于以上思想，在操作系统中应该构造两类进程抽象；处理机进程和存储进程，并实现处理机进程和存储进程的分离，首先分析了构造两类进程抽象（处理机进程和存储进程）并实现二者分离的原因，根据分析提出了实现处理进程和存储进程分离的方法。     

织女星网格的体系结构研究

网格技术是高性能计算机研究的热点，网格的体系结构是构建网格系统的基础，在分析比较现有网格技术的基础上，提出了织女星网格的体系结构设计，并对其中的关键问题进行了研究，织女星网格体系结构的基本思路是实现一台虚拟的、单一的网格超级计算机，其核心是Vege设计思想，织女星网格体系结构的关键组成包括网格硬件、网格互联系统以及网格操作系统，同时提出了资源路由器、网格计算协议、网格浏览器等重要概念。     

数据网格及其关键技术研究

从应用需求出发，首先分析了探讨了数据网格的基本目标：命名的透明性、定位的透明性、协议的透明性和时间的透明性，以及数据网格提供的基本服务：目录服务、注册与发布、信息发现、存储资源代理服务、身份认证与访问控制、调度和方法执行等，深入研究了数据网格的关键技术-元数据目录和存储资源代理，最后介绍了一个海量信息处理系统的设计。     

GIS-Based Analysis of Marginal Price Variation with an Application in the Identification of Candidate Ethanol Conversion Plant Locations

Facility location decisions require large investments of capital and represent long-term commitments for businesses. For firms that are highly dependent on access to raw materials, plant location has a major impact on direct material costs and, hence, on total product costs, pricing, and profitability. In the procurement of bulky, low-value raw materials, the cost of transportation represents a large portion of the final delivered cost. Depending on the commodity, the price paid is often a function of the maximum delivered cost (marginal price) of attaining a target quantity at a particular location. Such costs differ considerably from one candidate location to another if there is significant spatial variation in the quantities of the raw materials and the costs to produce them. In addition, the quality of a transportation network can play a role in the relative marginal prices among candidate locations. An adequate assessment of marginal price is essential for identifying promising areas for plant location. In this paper, we describe a methodology for generating marginal price surfaces when the number of potential supply points and the number of candidate plant locations are both very large. We present a GIS-based application of the methodology for the identification of promising locations for switchgrass-to-ethanol conversion plants.     

Automated test case generation for the stress testing of multimedia systems

With the advancement in network bandwidth and computing power, multimedia systems have become a popular means for information delivery. However, general principles of system testing cannot be directly applied to testing of multimedia systems on account of their stringent temporal and synchronization requirements. In particular, few studies have been made on the stress testing of multimedia systems with respect to their temporal requirements under resource saturation. Stress testing is important because erroneous behavior is most likely to occur under resource saturation. This paper presents an automatable method of test case generation for the stress testing of multimedia systems. It adapts constraint solving techniques to generate test cases that lead to potential resource saturation in a multimedia system. Coverage of the test cases is defined upon the reachability graph of a multimedia system. The proposed stress testing technique is supported by tools and has been successfully applied to a real‐life commercial multimedia system. Although our technique focuses on the stress testing of multimedia systems, the underlying issues and concepts are applicable to other types of real‐time systems. Copyright © 2002 John Wiley & Sons, Ltd.     

发电企业ERP模型的研究与设计

对发电企业资源计划模型 (ERP)进行了研究。在研究 ERP基本原理的基础上 ,针对发电企业的运营管理模式的特点 ,从企业的业务关系入手 ,给出了发电企业的 ERP总体模型、发电企业的数据流程模型 ,并运用领域工程的思想和构件 /架构技术 ,设计了发电企业 ERP系统的软件结构     

配电变电站内部通信网络研究与实践

根据配电变电站自动化系统中通信网络的特点，提出了一种从整体结构上分析评价配电变电站内部通信网络方案性能新方法，冻结合工程实践，用此方法对各可行方案进行了较为详尽的分析比较，在得出优选方案之后，围绕着如何在合理利用通信系统硬件资源的前提下尽可能提高通信系统网络性能的问题，阐述了系统各个通信单元软，硬件的设计思路及方法，最后，在总结实践经验的基础上，提出了一些值得进一步深入 研究的问题。     

Frequency security constrained short-term unit commitment

In island grids and weakly interconnected power systems, a loss of a large proportion of generation will cause the system frequency to fall dramatically. In order to ensure a stable operation with the lowest impact on the system, the disturbed power balance must be equalized within a short specified time by activating the seconds reserve of on-line units or by load shedding or both. This paper presents a frequency security constrained short-term scheduling. The procedure commits and optimizes units, calculates necessary seconds reserve capability, and allocates them among the available on-line units to provide emergent frequency regulation following a loss of generation. By means of the low-pressure pre-heater interruption (LPHI) implemented into thermal power plants, seconds reverse provision is increased. Thus, load shedding caused by insufficient availability of seconds reserve can be avoided. A case study on typical island systems with a large number of different units is demonstrated using the proposed procedure. Results from the study validated robust performance of the proposed procedure that minimizes fuel costs while maintaining frequency security condition.     

站在战略高度 搞好天然气地质基础研究

自“六五”以来,我国天然气地质已从石油地质研究中逐渐分离出来,形成中国天然气地质学。为了站在战略高度研究和认识我国天然气资源特点,评估我国天然气发展前景,应从资源评价、成藏机制等方面,加强天然气基础研究,并注意研究工作的集成。     

攀枝花钒钛磁铁矿的综合利用与深度加工

针对攀枝花钒钛磁铁矿的特殊性，探讨了攀钢冶炼过程中ＴｉＯ２的流向和分布情况，论述了钛系列精细化工产品深度开发的重要性，对攀枝花钛化工的发展方向提出了具体建议．认为，研制高纯ＴｉＯ２微粉和超微粉、钛酸酯偶联剂、ＴｉＣｌ２催化剂、钛系列彩色颜料、无机钛酸盐等多品种，作为大宗化工产品钛白颜料及钛冶金产品的补充，对进一步提高攀枝花钒钛磁铁矿的综合利用，具有十分重要意义．