A Case‐Based Reasoning system for complex medical diagnosis

A Case‐Based Reasoning (CBR) system for medical diagnosis mimics the way doctors make a diagnosis. Given a new case, its accuracy in practice depends on successful retrieval of similar cases. CBR systems have had some success in dealing with simple diseases because of the robustness of their case base. However, their diagnostic accuracy suffers when dealing with complex diseases particularly those that involve multiple domains in medicine. An example of such a condition is Premenstrual syndrome (PMS) as it falls under both gynaecology and psychiatry. To address this issue, the paper proposes a CBR‐based expert system that uses the K‐nearest neighbour (KNN) algorithm to search k similar cases based on the Euclidean distance measure. The novelty of the system is in the design of a flexible auto‐set tolerance (T), which serves as a threshold to extract cases for which similarities are greater than the assigned value of T. A prototype software tool with a menu‐driven Graphical User Interface (GUI) has been developed for case input, analysis of results, and case adaptation within the system. Finally, the performance of the tool has been checked on a set of real‐world PMS cases.     

大师设计小建筑

Ａ阿尔托和Ｊ．斯特林在不同年代为威尼斯双年展设计过作品,本文简要伸缩两位大师为１９９１年威尼斯双年展书亭和１９５６年威尼斯双年展设计的芬兰馆所作的设计,旨在展现大师科在斗室大的建筑中所表现的追求完善,精益求精、反复推敲的获业精神,这很值得我们学习,特别是初学者。     

Profibus现场总线通讯技术的应用研究

鉴于通信问题是现场总线控制系统集成的一个主要问题,本文探讨了现场总线的拓扑结构,以Profibus-DP工控网为基础,分析了其通信机理和链接方式,并建立了基于PLC的主从站式控制现场总线网络.阐述了实现Profibus-DP变频器控制通讯的原理及方法,并结合具体实例介绍了西门子PLC之间以及和ABB变频器的总线通讯.     

Solving the master equation for extremely long time scale calculations

The dynamics of magnetic reversal process plays an important role in the design of the magnetic recording devices in the long time scale limit. In addition to long time scale, microscopic effects such as the entropic effect become important in magnetic nano-scale systems. Many advanced simulation methods have been developed, but few have the ability to simulate the long time scale limit and to accurately model the microscopic effects of nano-scale systems at the same time. We develop a new Monte Carlo method for calculating the dynamics of magnetic reversal at arbitrary long time. For example, actual calculations were performed up to 10⁵⁰ Monte Carlo steps. This method is based on microscopic interactions of many constituents and the master equation for magnetic probability distribution function is solved symbolically.     

同步令牌通信方式及其扩展应用

本文提出一种新的网络访问方式。它引入了同步时钟和令牌链，使得各点可共享一条通信数据线而访问控制电路却简单到仅用几个Ｄ触发器即可实现。它具有传统令牌方式所没有的一些优点。在通信量较少，速度要求不高的场合，其效果很好。文中讨论的一种应用方式。     

一种新的基于固定拓扑结构的蓝牙组网协议

蓝牙技术是现在热门的无线组网技术, 以前文献多研究的是在无需人工干预条件下蓝牙设备自动组网的技术, 这样的组网协议在提供一定便利的同时也来了不便。在需求固定拓扑结构或需要某些节点保持在同一子网内部时, 由于那些组网协议没有人工参与以及蓝牙技术工作过程的随机性, 对于这一需求是无能为力的, 基于此, 提出了一种新的组网协议( STCP) , 旨在满足上述需求。     

Modelling of fracture toughness data in the ductile to brittle transition temperature region by statistical analysis

A fracture toughness database for a ferritic 22NiMoCr37 steel forging for 12.5, 25, 50 and 100 mm thick specimens tested at nine different temperatures has been analysed statistically. The method employed uses a statistical procedure based on competing risks to evaluate the fracture toughness and quantify the probability of cleavage fracture as a function of temperature, specimen thickness and ductile crack growth. This paper describes the application of the competing risks statistical methods to the fracture toughness database obtained from the joint European Project.     

用VB实现PC机与MCS-51单片机的主从式通信

主要针对多台ＬＥＤ 显示屏系统数据传送问题, 提出一种用Ｖｉｓｕａｌ Ｂａｓｉｃ 语言实现的ＰＣ机与多台ＭＣＳ—５１ 单片机主从式通信方法, 给出硬件电路图、通信协议及软件流程图     

强化通信调度在电力通信专网中的运行管理职能

从电力通信运行管理的实际需要出发,分４个方面论述了加强电力系统通信调度管理的重要性,从而探讨电力通信运行管理模式。     

G200 SMU实现多主站的远程通信

以新一类网络型变电站监控装置G200 SMU（站主装置）在上海南桥500kV交直流换流站实现SMU直接上广域网与国调中心和华东网调的EMS进行通信为例，介绍了开放式网络通信方案（ONCP）的特点，分析讨论了SMU直接上广域网实现方案的技术特点、结构特征及发展趋势，并对SMU与多个EMS及其它系统之间实现远程计算机通信方式的发展提出了看法。