协作机制评价和全局联合最优搜索的通用模型

现有协作机制(CM)评价和选择模型存在通用性差、易陷入局部最优、CM库难以建立及评价函数设计困难等缺陷,不能满足现代复杂协同系统的要求。该文针对CM动态选择系统,构建CM评价的通用模型,设计对CM及其参数进行全局联合最优搜索的遗传算法,对模型和算法进行仿真。仿真结果表明,该模型能克服原有模型的缺陷,其算法能搜索到全局联合最优CM库。     

第三代树莓派计算模块面市,进一步为设计工程师扩展工业与商业应用范围

全球树莓派系列产品与配件领先分销商与制造商日前宣布推出第三代树莓派计算模块、树莓派计算模块精简版及树莓派计算模块开发套件等三款全新产品. 树莓派计算模块3代(CM3)及其精简版(CM3L)是可机械兼容DDR2 SODIMM 的系统级模块(SoM ) ,包含内置处理器、存储器、eMMC闪存(仅CM3)及辅助电源电路.这些模块能够让设计师将树莓派软件及硬件栈用于其定制化系统和结构设计当中.     

HFC网络组播技术研究与实现

符合DOCSIS1.1规范的网络接入设备CM需要抑制组播.这种CM使用两种机制控制组播的转发,即设置策略过滤业务参数和专门的组播跟踪算法,而后者有passive IGMP和active IGMP两种模式.根据passive IGMP的要求和CM有固定的主机端口和固定的路由器端口的特点,设计并实现了一种电缆网络IGMP Snooping协议.该协议运行在MAC层,实现侦听CM收到的IGMP报文、维护组播组列表、过滤组播数据的功能.本设计在自主开发的物理层和MAC层芯片组成的HDTV(高清晰度电视)双向系统平台进行测试.     

基于数据资源的认知图挖掘方法

认知图(Cognitive Map,CM)是一种新型知识管理方法,具有直观的知识表达能力、强大的基于数字矩阵的推理机制等优点.但是,要充分展示CM的这些优点,首先必须获得正确的CM图.传统的获取CM图的方法(如问卷法、头脑风暴法、样本学习法等)常常借助专家经验,因其过分强调主观因素而忽视客观数据资源,容易导致信息丢失现象.为此,该文提出了一种基于客观数据资源来挖掘CM图的新方法,它主要由数据库初始化技术、权重系数优化方法、CM图的简化策略等组成.实验结果表明:该方法能挖掘出构成CM图的所有节点间的所有关系,并可针对这些关系间的重要程度对CM图作适当简化;与传统的方法相比,该方法所挖掘出的CM图具有更为丰富的信息.     

华硕晶品CM电脑低碳节能

华硕晶品CM系列电脑是华硕针对家庭用户的机型,从入门双核到中高端四核平台的多种配置,华硕CM系列台式电脑首次引入节能技术芯片,在静音、环保方面有独特表现。华硕主板专有的EPU节能引擎被植入CM系列,对机内耗电设备进行实时、智能的电源管理,根据系统负载情况进入超频模式或省电模式,可将系统功     

嵌入式集群系统的自动管理监测系统设计

论文针对嵌入式集群系统,利用基于SNMP协议的开发包和自主设计的代理模块(CM),设计和实现了集群系统的管理监测系统。该系统利用端口扫描程序,以及CM和基于SNMP的代理模块,实现了实时的监测功能,并且可以通过Web方式远程访问和其自身的自动管理两种方式来管理集群系统。     

接入网MAC层QoS系统多维报文分类算法的研究与应用

以HFC网络核心设备双向CM(Cable Modem)为研究背景,首先对报文分类经典算法和最新算法研究进展进行总结和分析,然后依据HFC网络QoS系统需求提出了一种基于B树结构和无冲突Hash函数的BH报文分类算法,并给出了该算法的详细设计和实现过程.通过理论分析得出该算法具有时间复杂度较低和占用内存小的特点,适合于CM等嵌入式应用环境.     

HP CM4540彩色一体机上市

近,惠普公司推出了新一代彩色数码多功能一体机HP Color LaserJet CM4540 系列3款新品:HP Color LaserJet CM4540、HP Color LaserJet CM4540f和HP Color LaserJet CM4540fskm.作为面向大型工作组应用的全能文印明星,HP Color LaserJet CM4540系列在打印安全性、易于管理、可扩展性和环保等方面都有出色表现,不仅无缝整合了打印、复印、扫描、发送、传真等功能,并且具有专业输出品质和超强输出能力,帮助用户轻松应对快速变革的商业环境.     

Bachmann控制器在X射线厚度测量系统中的应用

介绍Bachmann公司M1控制器在RM210CM X射线冷轧厚度测量系统中的应用,阐述控制系统的硬件组成和配置、控制器的软件架构及管理和监控应用软件.     

CM6132型卧式车床控制系统的PLC改造

CM6132型卧式车床电气控制系统采用继电接触器控制方式存在不少缺点,为此改用PLC控制取代传统的继电器控制。从制定改造方案开始,完成系统的硬件设计和软件设计。实践发现,改进后的CM6132型卧式车床电气控制系统性能有较大提高,具有较好的工业发展前景。     

Growing RBFNN-based soft computing approach for congestion management

In the emerging restructured power system, the congestion management (CM) has become extremely important in order to ensure the security and reliability of the system. In addition to this, lack of CM can impose a hindrance in electricity trading. This paper presents a novel, growing radial basis function neural network (GRBFNN)-based approach for CM. For achieving CM, Nodal congestion price (NCP) forecasting is performed in real time competitive power market. NCP forecasting is an effective way of price-based preventive CM as it directly indicates the presence as well as the severity of the congestion in the system. In present paper, GRBFNN has been developed for NCP forecasting dividing the whole power system into various congestion zones. An unsupervised learning vector quantization (VQ) clustering algorithm is applied as feature selection technique for the developed GRBFNN and for partitioning the power system into different congestion zones. For each congestion zone a separate neural network has been developed to ensure faster training and accurate forecasting results. The proposed approach of CM is implemented on an RTS 24-bus system. The results obtained are compared with a different constructive algorithm-based RBF network called as general regression neural network (GRNN) and two back-propagation algorithms based ANNs. Comparison results show that proposed GRBFNN is more computationally efficient with better predictive ability.     

QoS-based evaluation of file systems and distributed system services for continuous media provisioning

This paper presents a QoS-based performance analysis of file systems and distributed object services for Continuous Media (CM) provisioning, as well as the details and implementation experiences of a continuous media file system and associated CM servers. For this we have implemented QoS-driven CM servers and the Presto continuous media file system (PFS) in the context of a distributed multimedia application development environment, and validate the performance of PFS against that of the conventional Unix file system through an experimental evaluation. Using our CM server prototype, we next examine the effect of continuous media data delivery on the three different kinds of network protocols such as CORBA, UDP/IP, and TCP/IP, with respect to QoS provisioning and throughput.     

A conceptual modeling framework for discrete event simulation using hierarchical control structures

Conceptual Modeling (CM) is a fundamental step in a simulation project. Nevertheless, it is only recently that structured approaches towards the definition and formulation of conceptual models have gained importance in the Discrete Event Simulation (DES) community. As a consequence, frameworks and guidelines for applying CM to DES have emerged and discussion of CM for DES is increasing. However, both the organization of model-components and the identification of behavior and system control from standard CM approaches have shortcomings that limit CM’s applicability to DES. Therefore, we discuss the different aspects of previous CM frameworks and identify their limitations. Further, we present the Hierarchical Control Conceptual Modeling framework that pays more attention to the identification of a models’ system behavior, control policies and dispatching routines and their structured representation within a conceptual model. The framework guides the user step-by-step through the modeling process and is illustrated by a worked example.     

军事概念模型分阶段分层次开发过程研究

针对军事概念模型内涵多样化的问题,参考美军思想,将军事概念模型开发过程扩展为领域知识层概念模型和系统分析层概念模型2个阶段;并将后者进一步细分为仿真联合体层、仿真应用层、复合模型层等3个基本层次;然后,以空间作战模拟为例,给出了每个阶段、每个层次概念模型的含义以及它们的建模方法.分阶段、分层次开发军事概念模型的优点在于:每种概念模型侧重描述不同的内容,目标明确,能够很好地满足作战模拟系统开发周期中不同阶段、不同系统开发人员的需要,具有较好的应用价值.     

A novel symbiotic organisms search algorithm for congestion management in deregulated environment

Abstract

In today’s competitive electricity market, managing transmission congestion in deregulated power system has created challenges for independent system operators to operate the transmission lines reliably within the limits. This paper proposes a new meta-heuristic algorithm, called as symbiotic organisms search (SOS) algorithm, for congestion management (CM) problem in pool based electricity market by real power rescheduling of generators. Inspired by interactions among organisms in ecosystem, SOS algorithm is a recent population based algorithm which does not require any algorithm specific control parameters unlike other algorithms. Various security constraints such as load bus voltage and line loading are taken into account while dealing with the CM problem. In this paper, the proposed SOS algorithm is applied on modified IEEE 30- and 57-bus test power system for the solution of CM problem. The results, thus, obtained are compared to those reported in the recent state-of-the-art literature. The efficacy of the proposed SOS algorithm for obtaining the higher quality solution is also established.     

Novel planar balanced bandpass filter with wideband common‐mode suppression and in‐band common‐mode noise absorption

This paper presents a novel planar balanced bandpass filter (BPF) with wideband common mode (CM) noise suppression and in‐band CM noise absorption using coupled lines (CLs) with short‐circuited stubs to realize high selectivity and wideband differential mode (DM) filtering performance. Two one‐quarter wavelength stubs loaded with grounded resistors are introduced to realize wideband CM noise suppression. Thus, CM noise can be suppressed under a certain level at all frequencies. Four resistors are used to achieve CM noise absorption by dissipating the CM noise into heat, which can avoid the noise being reflected to the communication system and realize a wide absorption bandwidth with 90% absorption efficiency. For demonstration, an absorptive balanced BPF operating at 3.5 GHz with wide 3‐dB fractional bandwidth (FBW) of 79.43% is fabricated and experimentally validated. It is worth noted that the absorptive balanced BPF can realize broadband CM noise suppression from 0 to 8 GHz, and the CM noise is well absorbed more than 10 dB from 2.41 to 4.63 GHz. Besides, wideband CM noise absorption with 90% efficiency from 2.51 to 4.60 GHz is realized, which indicates potential applications in improving the performance of the balanced radio frequency (RF) circuits. Good agreements between the simulated and measured results are observed.     

Productivity optimization of cellular manufacturing systems

A two-stage CM productivity model is proposed. In the first stage, a 0–1 integer programming model is developed to design CM system. In this model, part families and machine cells are formed simultaneously. In the second stage, a total productivity model for CM systems is developed to optimize the total productivity of manufacturing cells by further using the unutilized machining time available on various machines. An example problem is illustrated.     

Yima: a second-generation continuous media server

Continuous media data requires a streaming architecture that can manage real-time delivery constraints and address the large size of CM objects. Although commercial systems ordinarily use proprietary technology and algorithms, making it difficult to compare their products with research prototypes, the authors have designed and developed Yima, a second-generation CM server that demonstrates several advanced concepts. Although this system has not yet achieved the refinement of commercial solutions, it is operational and incorporates lessons learned from first-generation research prototypes, including complete distribution, efficient online scalability, and synchronization of several media streams within a single frame. The paper discusses the multinode server architecture     

一种边界到边界的拥塞感知的三色标记器*

通过对基本的流量标记,特别是在CATC、CASR3CM和ITSW3CM研究的基础上提出了拥塞感知的流量标记器CATSW3CM。理论分析和仿真实验表明,CATSW3CM与CATC相比,不仅提高了AS TCP流的平均吞吐量,而且增强了吞吐量的稳定性,提高了AS TCP流之间占用带宽的公平性,并且更为简单,具有很好的扩展性。