无触点集中-分散目标远动系统逻辑结构的研究

本文研究了无触点集中-分散目标远动系统的逻辑结构.文中提出了采用简单的系统变结构来发送和接收信息的逻辑结构方式.对被控制点及一部分比较重要或变化比较频繁的被控制目标的信息,保留了循环传送,而对大部分变化比较慢的被控制目标则采用目标有变化时才传送信号的方式,这样就提高了系统的平均动作速度,同时也减小系统的失步概率.文中采用环节的复合利用及简化的逻辑单元线路来实现这种系统的逻辑结构.例如用两个分配器和一个简单的逻辑单元“和”线路组成了很简化的选点自动程序编码器,同时这两个分配器又复合利用兼组成目标信号接收矩阵式分配器等,因而可以使得这种系统同时又具有较高的极简化度.     

采用复合传输线的高速进位线路

在已经发表的电流型进位线路中,脉冲变压器的绕组电容和晶体管的存储效应限制了它的运算速度,特别是限制了重复频率的提高。本文所介绍的一种进位线路,由于在结构上采用了三绕组的脉冲变压器、把传送线路分开并使在传送进位信号的线路内不包含门单元等措施,因而能使传送速度提高、工作稳定。为了研完这种传送线路的结构和探求这种进位方式的速度的上限,做了一个40位的传送线路,并进行了实验。实验的结果是成功的,进位信号的传送速度能达每位0.25毫微秒。     

基于C6701的短波信号实时处理模块

本文描述了一种基于C6701的短波信号实时处理模块,该模块用于短波信号接收分析系统中快速截获短波通信信号;论文介绍了模块硬件组成结构、各单元实现方案,同时介绍了处理软件流程.     

铁氧体—晶体管专用数字计算机的运算器

本文简述了用作运算器逻辑元件的铁氧体—晶体管单元的原理和逻辑线路。介绍了采用这种元件的运算器逻辑线路的设计方法。文中以完成基本操作为例,讨论了运算器的工作情况。     

基于相控阵天线的RFID系统设计

设计了一种可扩展阅读范围的相控阵天线RFID系统。采用Intel R1000阅读器开发平台、MASWSS0204开关芯片,研制了功率分配器、移相器、天线阵,搭建了符合ISO 18000-6C和EPC globalGen 2标准、中心频率为915 MHz RFID阅读器系统。系统引入相控阵原理,并对阅读器进行了简单改动,设计了相控阵RFID系统的硬件组成结构和软件工作流程。设计的相控天线阵列由2×2个微带天线单元、3个功率分配器和1个移相器组成,使用FR4介质板材料制作。实验结果表明,该系统增大了RFID信号的覆盖范围。     

基于CPLD的数据远程传输接收端逻辑控制设计

针对自主研发的脉冲辐射剂量探测系统,首先介绍了其光纤远程实时传输链路的组成.然后在分析数据接收单元电路结构和主要信号特点的基础上,设计并实现了基于CPLD的数据接收与上传的逻辑控制.CPLD一方面要从解码芯片接收并识别数据和同步信号,对数据包进行传输扩展,另一方面则要完成对USB接口模块数据传输的控制.辐射探测系统的整体测试与应用验证了CPLD逻辑控制电路设计的正确性.     

基于HOLTEK MCU的智能型电源线资料传输系统

所提出的智能型电源线资料传输系统,是以电源线作为信号传输的系统,以HOLTEK MCU单片机作为控制单元,控制载波及信号的频率,以变化的载波及信号的频率先传送的测试信号,后再由收到的信号品质评估最佳的载波及信号的频率,以此频率传送的摇手信号,待另一电路回应信号后,便以此频率传送及接收资料。     

高速计算机用的带状电缆传输线

在电子计算机中往往把字的信息用一束传输线来进行传送,在传输高速脉冲信号时,对带状电缆组成的二线式或三线式传输线路进行了试验,以便代替由大量同轴电缆组成的传输线路。带状电缆的优点是,它既可取得较高的波阻抗,又能使机械结构简化。在距离较短的线路上,不仅信号噪声儿(S/N)极大,而且传输速度亦超过同轴电缆。本文同时还介绍了求算试制的带状电缆的各种常数,分析各种传输特性和少数导体的带状电缆在计算机中作短距离的传输。对于加上上升时间为20毫微秒的脉冲信号时的传输特性进行了实际测量,得到了良好的特性。     

超高速ECL通用逻辑门

本文提出用ECL通用逻辑门(ECL-ULG)作ECL-LSI门阵列的基本单元。ECL-ULG结构简单、逻辑灵活、连线少和速度快。文章着重论述AND-OR通用逻辑门的数学性质和二变量的ECL-ULG线路原理。对于ECL-ULG的组合逻辑和时序逻辑在文中也作了简单介绍。     

无线多路并行数据采集系统的设计

本文针对工程实践的需要,设计了一种基于无线传输方式的多路信号并行采集系统RFDAQ-Ⅱ.RFDAQ-Ⅱ由一个数据接收单元和若干个并行数据采集单元组成,数据采集单元与接收单元之间通过无线的方式进行通讯,每个采集单元可进行最多四个通道的并行数据采集.本文介绍了RFDAQ-Ⅱ的系统原理和结构,并详细讲述了它的硬件结构、无线通讯协议及软件设计.     

A tool for organizing Web information

The physical and logical differences among information sources on the Internet complicate information retrieval. For instance, data is no longer just simple text or tuples, but now includes objects and multimedia. Data can also have varied and often arcane semantics. Sources have different policies, procedures, and conventions and are hosted by diverse platforms. Ontologies-models of concepts and their relationships-are a powerful way to organize query formulation and semantic reconciliation in large distributed information environments. They can capture both the structure and semantics of information environments, so an ontology-based search engine can handle both simple keyword-based queries as well as complex queries on structured data. Ontology-based interoperation is especially good at dealing with inconsistent semantics. However; ontologies are difficult to construct. The Java Ontology Editor (JOE) helps users build and browse ontologies. It also enables query formulation at several levels of abstraction. The authors discuss the use of JOE to develop a health care information system     

基于CSCW环境的协同质量管理系统的研究

首先对CSCW在质量管理系统中的应用进行了讨论，对CSCW框架及其内部的逻辑结构以及Agent对象的逻辑模型进行分析和讨论。最后，介绍本系统的设计及实施过程，以及系统中采取MAS方式解决多模块的信息共享和动作协同问题的处理方法。     

Detecting objects of variable shape structure with hidden state shape models

This paper proposes a method for detecting object classes that exhibit variable shape structure in heavily cluttered images. The term "variable shape structure" is used to characterize object classes in which some shape parts can be repeated an arbitrary number of times, some parts can be optional, and some parts can have several alternative appearances. Hidden State Shape Models (HSSMs), a generalization of Hidden Markov Models (HMMs), are introduced to model object classes of variable shape structure using a probabilistic framework. A polynomial inference algorithm automatically determines object location, orientation, scale and structure by finding the globally optimal registration of model states with the image features, even in the presence of clutter. Experiments with real images demonstrate that the proposed method can localize objects of variable shape structure with high accuracy. For the task of hand shape localization and structure identification, the proposed method is significantly more accurate than previously proposed methods based on chamfer-distance matching. Furthermore, by integrating simple temporal constraints, the proposed method gains speed-ups of more than an order of magnitude, and produces highly accurate results in experiments on non-rigid hand motion tracking.     

基于状态与关联日志的业务对象关联模型

构造良好的业务模型是实现企业信息系统快速重构以适应业务变化的关键。传统的业务建模方法对业务对象之间存在的复杂关联关系无法有效解决，对系统的可扩展性、二次开发效率、追溯性等方面有较大影响。为了解决此问题，提出了一种基于日志的业务对象关联模型，将对象间关联关系与业务对象清晰分离开来，重点探讨了业务对象间数值关联方式，采用简单操作来处理对象内部业务逻辑，采用复合操作来处理对象间关联关系，并将运行时的对象状态与关联信息分离出来形成日志，进而实现基于日志的业务追溯。     

A state-based knowledge representation approach for information logical inconsistency detection in warning systems

Detecting logical inconsistency in collected information is a vital function when deploying a knowledge-based warning system to monitor a specific application domain for the reason that logical inconsistency is often hidden from seemingly consistent information and may lead to unexpected results. Existing logical inconsistency detection methods usually focus on information stored in a knowledge base by using a well-defined general purpose knowledge representation approach, and therefore cannot fulfill the demands of a domain-specific situation. This paper first proposes a state-based knowledge representation approach, in which domain-specific knowledge is expressed by combinations of the relevant objects’ states. Based on this approach, a method for information logical inconsistency detection (ILID) is developed which can flexibly handle the demands of various domain-specific situations through reducing part of restrictions in existing methods. Finally, two real-case based examples are presented to illustrate the ILID method and its advantages.     

基于知识的多页文档逻辑结构的分析和理解

文档图像理解中最重要的部分是逻辑结构的提取。目前的研究主要集中在页面的布局分析上,少数对文档逻辑结构的研究只是针对单页文档或页面关系简单的多页文档。建筑标书的特殊性在于其层次式的逻辑组成结构没有明确的索引信息标识。本文提出了一种利用页面间引用关系获取文档逻辑结构的方法。该方法采用修正的树形结构表示文档的逻辑结构,逻辑树的创建过程就是逻辑结构的获取过程,而且有利于更高层的语义处理及还原输出。该方法已在标书自动处理系统中实现,保证了该系统的灵活和高效。     

一种面向主动对象的实时数据模型

针对支持复杂实时应用的实时数据库管理系统,提出了一种面向主动对象的实时数据模型AOORT,将面向对象实时性和主动性更好地集成在一起。模型由对象、关系和规则3部分组成。对象用来对带有时间特性的实体进行建模,扩展了传统对象来提供实时和主动特征;关系描述了对象之间的联系情况;规则体现了数据库的主动性,并集成了时间约束。最后以一个简单网络化控制系统中的实时数据采集和监控子系统为例,展示了AOORT模型的具体应用。     

Table form document analysis based on the document structure grammar

Structure analysis of table form documents is an important issue because a printed document and even an electronic document do not provide logical structural information but merely geometrical layout and lexical information. To handle these documents automatically, logical structure information is necessary. In this paper, we first analyze the elements of the form documents from a communication point of view and retrieve the grammatical elements that appear in them. Then, we present a document structure grammar which governs the logical structure of the form documents. Finally, we propose a structure analysis system of the table form documents based on the grammar. By using grammar notation, we can easily modify and keep it consistent, as the rules are relatively simple. Another advantage of using grammar notation is that it can be used for generating documents only from logical structure. In our system, documents are assumed to be composed of a set of boxes and they are classified as seven box types. Then the box relations between the indication box and its associated entry box are analyzed based on the semantic and geometric knowledge defined in the document structure grammar. Experimental results have shown that the system successfully analyzed several kinds of table forms.