A Framework for Providing User Level Quality of Service Guarantees in Multi-Class Rate Adaptive Systems

The problem of channel sharing by rate adaptive streams belonging to various classes is considered. Rate adaptation provides the opportunity for accepting more connections by adapting the bandwidth of connections that are already in the system. However, bandwidth adaptation must be employed in a careful manner in order to ensure that (a) bandwidth is allocated to various classes in a fair manner (system perspective) and (b) bandwidth adaptation does not affect adversely the perceived user quality of the connection (user quality). The system perspective aspect has been studied earlier. This paper focuses on the equally important user perspective. It is proposed to quantify user Quality of Service (QoS) through measures capturing short and long-term bandwidth fluctuations that can be implemented with the mechanisms of traffic regulators, widely used in networking for the purpose of controlling the traffic entering or exiting a network node. Furthermore, it is indicated how to integrate the user perspective metrics with the optimal algorithms for system performance metrics developed earlier by the authors. Simulation results illustrate the effectiveness of the proposed framework.

Automatic parallelisation for LTI MIMO state space systems using FPGAs. An optimisation for cost & performance

The parallelism attained by the use of Field Programmable Gate Arrays (FPGAs) has shown remarkable potential for accelerating control systems applications. This comes at a time when well established methods based on inherited serial Central Processor Units (CPUs) cannot guarantee solutions for the increasing execution speed demands. However, the transition from serial to parallel architectures represents a tremendous challenge due to overwhelming numbers of unexplored options and conflicting factors. The work presented achieves a parallelisation characterisation for generic MIMO systems using stand-alone FPGA implementations. The main contribution is that a very fine subset of possible serial/parallel implementations is obtained. This is used to achieve a flexible trade-off between cost and performance. Automatic optimisation of latency, occupied FPGA area and execution speed is attained and justified in respect to most of the feasible scenarios.     

用于MIS的实时数据共享软件平台的设计与实现

电网企业的各种信息,相互间具有相当紧密的关联关系,这些信息关联的核心就是电网实时数据。将电网实时数据引入到管理信息系统(MIS)中,使管理信息系统能够有效的分析利用实时数据对于促进电力系统的信息化发展具有重要意义。本文详细的阐述了用于管理信息系统(MIS)的电网实时数据共享软件平台的系统结构、工作原理以及设计与实现,提出了解决电网企业生产网和管理网信息共享以及MIS各个子系统同时共享调度实时数据的技术手段,并介绍了系统在电网信息管理系统中的具体应用。     

程潮铁矿球团厂抽风干燥系统除尘器的选型

从球团抽风干燥段除尘烟气的性质、国内常用的几种高温布袋过滤毡的化学性质及其使用效果对比、布袋除尘改造成为电除尘后的使用效果等三个方面，对程潮铁矿球团抽风干燥除尘器的选用进行了分析，结果认为对于球团抽风干燥段高含硫烟气的除尘宜选择电除尘器，其效果将远远优于布袋除尘器。     

低压省煤器在电站锅炉中的应用

针对排烟损失大的问题，某些电厂在电除尘器出口加装低压省煤器，用来加热凝结水或热网补水，从而吸收烟气热量，实际测试结果表明，对于节能降耗和保证安全运行均起到了重要作用。     

汽车排气污染浓度预测

运用空气质量模式的基本理论，研究汽车尾气排放的扩散规律。选用多种典型空气质量模式，对汽车污染进行计算机模拟。在每一模式下，可对大气稳定度，混合层高度、扩散参数等进行选择计算；并能进行瞬时浓度及长期浓度的预测。设计的程序适用于各种气象务件、各种道路条件、各种车型。     

Mineralogy of clean coal combustion by-products

Coal combustion technologies are changing in order to burn coal more cleanly. Many “clean combustion“ and postcombustion technologies are developed to remove SO2 and NOx gases, particulate matter during combustion, or from the flue gases leaving the furnace. This paper focuses on three types of fly ash (flue gas desulfurization (FGD) residuals, atmospheric fluidized bed combustion (AFBC) residuals and sorbent duct injection (SDI) residuals) which produced by “the clean combustion“ and postcombustion technologies. The residuals formed by FGD are PCFA (pulverized coal fly ash) grains entrained with reacted and unreacted sorbent and have lower bulk densities than PCFA grains because it contains higher concentrations of calcium and sulfur, and lower concentrations of silicon, aluminum and iron than PCFAs. AFBC residuals consist of spent bed which is a heterogeneous mixture of coarse-grained bed material and irregularly shaped, unfused, spherical PCFAs. The main crystalline phases in AFBC residuals are anhydrite (reacted sorbent), quartz and lime (unreacted sobent), calcite, hematite, periclase, magnetite and feldspars.The residuals produced by SDI contained 65%-70% PCFA with the larger sizes material being irregularly shaped, fused or roughedged. The reaction products of sorbent (portlandite and lime) included calcium sulfate (anhydrite) and calcium sulfate. The chemical properties of these residuals are similar to those of high calcium PCFAs because of the high alkalinity and high pH of these residuals.     

对工程项目管理系统的认识

工程项目管理系统是企业信息系统中关键的子系统。用于指导和协调其它子系统之间业务传递和数据共享。针对工程项目管理存在的信息沟通困难、数据易变化、书面文档多的难点，在建立工程项目管理系统时。可通过计算机网络系统、信息沟通系统、电子文档管理系统、项目数据管理系统等来实现对工程项目的管理。     

RS232串口通信在摩托车排放测试中的应用

针对传统的摩托车排放检测硬件电路复杂,易受干扰的不足,提出了一种新型的串口通信的摩托车排放测试方法.将工控机和排放仪利用串口线相连,利用MSComm控件编写RS232串口通信程序,实现了工控机对排放仪数据的采集、数据显示和结果判断.实际运行结果表明,该方法硬件电路简单、成本低、传输数据不易受干扰.     

高压溶出稀释槽乏气利用的改进措施

本通过对高压溶出稀释槽产生乏汽的原因进行分析，同时也对目前乏汽利用中存在的不足提出了改进措施，通过改进可以节约大量的蒸汽，降低消耗费用，改善现场操作环境，对进一步提产降耗和改善环境状况都会起到积极的作用。