风电机组通信模块软硬件设计

针对IEC61400-25明确提出风电机组的通信应基于制造报文规范通信协议，设计并实现一种基于IEC61400—25标准的风电机组通信模块。该模块采用ARM9＋JAVA＋MMS结构，通过提供IED配置、IED信息模型的重构、设备参数的读写等通信服务，以及对标准MMS通信协议风电场无缝通信的实现，可屏蔽风电机组的通信差异，有效解决一致通信问题，提高风电场通信的效率与可靠性。     

Robustness of quantized control systems with mismatch between coder/decoder initializations

This paper analyzes the stability of linear systems with quantized feedback in the presence of mismatch between the initial conditions at the coder and decoder. Under the assumption of the perfect channel, we show that using the scheme proposed in [Liberzon, D., & Neši?, D. (2007). Input-to-state stabilization of linear systems with quantized state measurements. Institute of Electrical and Electronic Engineers Transaction on Automatic Control, 52, 767-781] it is possible to achieve stability with exponential convergence of linear systems with quantized feedback when the coder and decoder are initialized at different initial conditions.     

模糊petri网理论定量分析空间信息系统传输能力

运用FPN（Fuzzy Petri Nets）原理,结合层次分析法,采取定性与定量分析相结合的方法进行评价,最终利用仿真实例对信息传输能力进行评估,着重分析误码率对传输能力的影响,对实际构建和运用信息传输网络具有一定的借鉴意义。     

ScalaTrace: Scalable compression and replay of communication traces for high-performance computing

Characterizing the communication behavior of large-scale applications is a difficult and costly task due to code/system complexity and long execution times. While many tools to study this behavior have been developed, these approaches either aggregate information in a lossy way through high-level statistics or produce huge trace files that are hard to handle.     

Node discovery in networks

This paper abstracts the problem of network nodes discovering one another in a network of unknown size using all-to-all gossip. The problem is studied in terms of evolving directed graphs where each vertex represents a participating node and each edge represents one node’s knowledge about another. Ideally, such a graph has diameter one, i.e., each node knows all others. Nodes share their knowledge by sending gossip messages. Gossip among the nodes allows them to discover one another, decreasing the diameter of the graph. Here this problem is considered in several synchronous settings under different assumptions about the ability of the participating nodes to communicate. Specifically, the following aspects of communication are considered: (1) the ability of the nodes to multicast gossip messages, and (2) the size of the messages. The results describe the lower and upper bounds on the number of synchronous rounds required for the participants to discover each other. A particular question of interest is: if the network size is unknown, how does a node know that it has discovered all other nodes? Given a weakly-connected graph describing the initial knowledge of the nodes, every node in our algorithm can stop the discovery process knowing that there are no unknown nodes—this is done without any prior knowledge of the total number of nodes participating in the computation.     

Experimental study on the compressive resistance of stress-relieved solid round steel members

The Canadian Standard for Antenna Towers and Antenna Supporting Structures, CSA-S37-01, specifies expressions for the compressive resistance of solid rounds based on the Structural Stability Research Council (SSRC) Column Curves for non-solid-round members and the results from experimental investigations on the compressive resistance of solid rounds carried out back to 1965. Similar Standard in USA (TIA/EIA-222-G.0) specifies design criteria for such members as derived from the superseded AISC-LRFD-94 Standard, which is independent of the shape of the member cross-section. The European Standard, Eurocode 3, provides column curves for the compressive resistance of various structural steel members, and assumes the applicability of one of them to solid rounds. As such, it is necessary to conduct an experimental study on solid round stress-relieved steel members to refine the available design equations for such members. This paper provides a summary of the literature review on solid rounds as well as a recent test program conducted on stress-relieved steel solid rounds. Correlation between the results from these tests and the current practice for the design of solid rounds is investigated. The paper concludes with a proposed compressive resistance equation for economical design of such members.     

Nostalgic research reflections

This research aimed to generate opportunities for UK construction companies, particularly contractors and consultancies with 50 to 150 employees to improve relationships with clients and to increase effectiveness through the exploitation of communication procedures and technologies. The research team used an action learning approach to work with managers from construction companies and housing associations to design and deliver support mechanisms, such as industry workshops, specific to the needs of SMEs. Analysis of the results showed how, as a result of interacting with other groups within a non-adversarial environment and benefiting from the process, partnering and performance improvement came to be seen as both desirable and possible. The trust and confidence generated from working together successfully also led construction SMEs to share good practice with others from the industry, including local competitors. The authors propose that SMEs should be treated as ‘leaders’ and ‘full partners’ within the programme for UK industry improvement being championed by Sir John Egan (1998), rather than simply recipients. It is also suggested that governments provide further support to ensure participation from small and micro firms.

Cette étude a pour objectif de geénérer des opportunités pour les entreprises britanniques du bâtiment, notamment pour les entrepreneurs et les bureaux d'ingénieurs conseil employant de 50 à 150 personnes, afin d'améliorer les relations avec la clientè le et accroîitre l'efficacité grâce à l'exploitation des procédures et des technologies de communication. Lors de ses travaux avec les responsables de la construction et de l'habitat, l'équipe de recherche a adopté une approche basée sur l'apprentissage des processus afin de concevoir et de fournir des mécanismes de support, tels que des ateliers industriels, spécifiques aux besoins des PME. L'analyse des résultats a révelé la f?on dont, suite à l'interaction avec d'autres groupes au sein d'un environnement non concurrentiel et tirant avantage du processes, l'amélioration du partenariat et des performances pouvait s'avérer à la fois souhaitable et possible. La confiance générée par la réussite de la collaboration a également conduit les PME du bâtiment à partager leurs bonnes pratiques avec d'autres acteurs de l'industrie, concurrents locaux inclus. Les auteurs proposent de traiter les PME en tant que ‘leaders’ et ‘partenaires à part entière’ dans le cadre du programme pour l'amélioration de l'industrie britannique défendu par Sir John Egan (1998), et non comme de simples récipiendaires. Il est également suggéré que les gouvernements fournissent d'autres subventions pour garantir la participation des petites et des micro-entreprises.     

个性化传播中可变数据的开发和应用(英文)

个性化传播包括许多因素:市场营销策略,清晰的数据库,建立客户接触点的数据分析,针对客户接触点的相关市场策略的规则,对客户隐私的保护,文件输出,衡量成功的尺度和响应客户反馈的迭代设计。近年来,利用客户数据实现个性化传播已获得越来越多的关注。然而,利用精确的数学方法从客户数据中提取关系数据,然后将其转化为抽象的规则,并融入实际的设计,这与其说是一种科学技术,不如说是一种艺术。本论文主要探讨了如何有效地将通过数据挖掘得到的重要变量转化为具体的编程规则,以准确地表示这些可变数据,并应用到个性化传播中。     

Freelance 800F DCS系统的数据通信分析

本文主要介绍ABB的Freelance 800F DCS系统的数据通信，以该系统为例，重点阐述了DCS系统数据通信的硬件结构，分析了操作级与控制级两个不同网络层次的数据通信特点，并分别给出了相关网络结构图。最后，对上述通信网络结构图进行了重点剖析。     

环境雕塑信息传播效果解读——以长沙市黄兴南路步行街《老长沙》系列环境雕塑为例

以长沙市黄兴南路步行街环境雕塑为例,解读环境雕塑信息传播效果,从一个新的视角来探讨环境雕塑设计,为环境雕塑设计带来一些启示。