基于继电辨识的Smith预估自校正算法的应用

工业过程控制的对象通常都存在纯滞后环节，含有纯滞后环节的系统特征方程中含有时滞项e^-τS，相当于在回路中引入附加相移，这将引起系统不稳定或降低系统的反馈性能，采用常规PID调节器不能获得较好的控制品质。Smith预估器是克服纯滞后影响的有效方法，但是控制算法需要控制对象的精确数学     

基于模糊模式与免疫功能的模糊控制系统设计方法

模糊控制系统的设计面临着两个难题，一是模糊控制规则的适应性问题；二是稳定性分析问题．为解决这两个问题．受经典控制利用控制对象的数学模型分析系统稳定性的启示，构造模糊对象的模糊模式来分析模糊系统的稳定性，并提出免疫功能，用以解决通常搜索算法在模糊模式系统辨识中完备性与健全性的不充分问题．     

改进型内模控制系统的稳定性与鲁棒跟踪条件

为了改善系统的响应性能或解决常规内模控制不能用于不稳定对象的问题，通常在常规内模控制结构中增设一个反馈环节，但这种改进型内模控制系统的性能分析尚缺乏系统的、令人满意的结果．为此，利用基于传递函数互质分解的频域理论，系统地分析了这种改进型内模控制系统的稳定性和稳态性能，得到了保证系统内稳定和鲁棒跟踪的一般性结论，并且无论控制对象稳定与否、系统连续或离散，该结论都适用．     

基于对象的存储系统对象迁移策略

对象存储系统是下一代网络存储重要组织模式，对象管理是对象存储系统的关键技术之一。本文对对象存储系统中的对象迁移策略进行了系统的研究，提出了可变阈值和域长的动态反馈调整模型，以此来确定存储对象迁移的时机和目标对象存储设备的选取。另外，本文还利用Petri网工具对对象存储系统存储对象的迁移进行建模分析，给出了存储对象迁移控制的Petri网模型。但是随着存储系统存储节点的无限增加，Petri网模型将会无限复杂和庞大。为了减少Petri网模型控制模型的复杂度，又引入有色Petri网理论，实现了对存储对象迁移控制Petri网模型的简化。该模型同样很好地实现了对象存储系统中对象迁移控制的建模分析。这些研究对我们在建立对象存储系统时起到了很好的帮助作用。     

小型轧钢厂250—300机组加热炉的集散系统及其维护使用

重点阐述了控制方案的选择；强调控制方案的选择应根据现场被控对象的静态特性和动态特性、技术条件、可控性方面考虑，同时阐述了对象集散系统日常维护管理。     

小型轧钢厂250和300机组加热炉的集散系统及其维护使用

重点阐述了控制方案的选择；强调控制方案的选择应根据现场被控对象的静态特性和动态特性、技术条件、可控性方面考虑，同时阐述了对象集散系统日常维护管理。     

载货车辆称重管理系统中并发控制机制的研究和实现

载货车辆称重管理系统在大型厂矿企业中占据重要的地位。在该系统中,通常一些用户拥有相同的使用权限,如果这些用户不加以合理控制会破坏数据库一致性,因此怎样避免数据共享中的冲突通常是在系统开发过程中需要解决的关键问题。本文针对称重管理中多用户共享访问实时数据库数据时出现的问题,探讨了并发控制机制和解决并发控制的方法。     

一种用于嵌入式控制系统的实时任务容错调度算法

嵌入式系统应用于自动控制领域时，往往对实时性和可靠性要求严格，如飞行控制、汽车自动刹车等，如果响应不及时，可能产生灾难性后果。随着应用对象复杂性的增加，嵌入式控制系统ECS(Embedded Control System)通常由多处理机构成，包含一组实时任务，每一个任务承担系统总目标任     

一种多智能仪表DCS实验系统的构建

利用控制PC机通过串行通信接口卡、RS-485总线与智能仪表相联，构建多智能仪表DCS实验系统，其控制对象既可以是实际的工业过程对象，也可以是被控对象模型系统。监控软件提供了明确的控制接口，可以方便地实现各种控制算法的控制实验。     

基于PLC的分布式两级可操作控制系统的设计

通过对多种分布式控制系统的研究，结合控制对象和现场的具体特点，提出了一种基于PLC和工业控制计算机的二级分布式控制系统的软硬件设计方法；该系统实现了对不同种类的多台环境试验设备的集中监控与管理，并可通过现场设备的PLC和系统总控软件对任意设备进行二级操作；该系统易于维护和扩展，实际操作简单方便，运行稳定可靠。     

Pattern recognition by means of disjoint principal components models

Pattern recognition based on modelling each separate class by a separate principal components (PC) model is discussed. These PC models are shown to be able to approximate any continuous variation within a single class. Hence, methods based on PC models will, provided that the data are sufficient, recognize any pattern that exists in a given set of objects. In addition, fitting the objects in each class by a separate PC model will, in a simple way, provide information about such matters as the relevance of single variables, “outliers” among the objects and “distances” between different classes. Application to the classical Iris-data of Fisher is used as an illustration.     

Requirements for intelligent network service operations

A service operation architecture and operation system platform are proposed that separate commonly used information from operations functions, and that use access control functions. This enables new applications to be developed more easily and increases operating efficiency. The operation system platform is related to several surrounding platforms, and requires standardized reference points such as CMIS/P and managed objects. A managed object methodology is a suitable approach for accessing the operation system platform, and managed object classes and methods are proposed for intelligent network service operations. This architecture and platform will allow telecommunication to meet the demands created by intelligent networks for enhanced customer services, more reliable operation systems, and lower development costs. On the basis of proposed platform, service surveillance prototype systems for free-phone services have already been developed, and the next versions of the service operations systems for virtual private networks services are being developed.     

复杂对象版本的数学模型

复合组合对象的版本管理机制是工程数据库系统的重要组成部分。本文以支持工程设计方案的修改，选择及配置为主要目的，对ＣＯＨＯＲ复杂对象进行了版本扩展，提出了复杂对象版本的数学模型，并从语义角度讨论了ＤＡＴＦＥＡ版本管理系统的版本模型和基本操作等问题。     

Enterprise Resource Planning as the Trojan Horse for New Rules of Operations Management

The control of operations, for example; the flow of materials, the scheduling of production, the planning of capacity – these are central problem in operations management. A substantial body of technique, with attendant technologies, has been developed to facilitate the problem of control of operations. One such technique is Manufacturing Resource Planning (MRP). This technique has developed in power and scope in concert with the development of power in computer based technology. From the perspective of the operations management literature, MRP has evolved into MRP II, and now into Enterprise Resource Planning (ERP). MRP, and MRP II are systems that are embedded within the operations function, and can be controlled legitimately by the operations function; ERP is fundamentally different. ERP systems in their model implementation are enterprise wide, integrated systems. As an enterprise wide system, ERP has created an opportunity to distance the power to influence operations actions from the location of the function. This change has significant implications for the companies adopting the technology, and more specifically, for the profession of operations management. This paper develops a framework of analysis for this change, presents a set of small cases, and discusses some implications that can be drawn from the analysis. The “three arenas of information use – sense making, knowledge creating, and decision making” (Choo 1998, p.3) must be allowed to energize each other and this can only happen if organization wide information systems, such as ERP, respect and empower situated action, enable ambiguity, and allow the use of multiple interpretive frames as managers interact with the situations of operations management.     

工程信息结构的语义模型

本文提出一种新的语义模型，该模型能够支持ＣＩＭ工程中相互联系的各类数据的结构化管理。首先定义了问题范围内的对象与对象类；在研究对象间联系的基础上建立起对象、对象类之间的语义关系；然后定义了作用于语义关系和对象上的操作，从而得出一种面向工程信息结构的语义模型。模型描述了一个项目的层次结构。通过在共享对象上建立等价语义关系，能够将项目的层次结构图转化为项目树，进而可用树结构实现对ＣＩＭ工程中产品及各类     

Graphic Objects: A Mathematical Abstract Model for Computer Graphics

This paper defines an abstract mathematical model for graphic systems which incorporates modelling operations. The model is based on the “graphic object” concept. A graphic object is an abstraction of a graphic entity. Graphic objects are a generalization of the Fiume graphic object concept, supporting modelling operations, which give the set of graphic objects an algebraic structure of vector space and booelan algebra. Fiume visualization formalism can be applied to graphic objects. Further, product operations of graphic objects are defined, which are a generalization of solid sweep operations. Graphic object products may be used to build common 2D and 3D objects such as triangles, squares, cubes, circles and spheres from lines and arcs.     

Object-oriented design of FMS control software based on object modeling technique diagrams and Petri nets

Control software is very important to realizing the full benefits of flexible manufacturing systems. This paper highlights the difficulties in developing such software and proposes an object-oriented design (OOD) method using object modeling technique (OMT) diagrams and Petri nets (PNs). OOD is used to design reusable and easily maintainable software. OMT diagrams are used to represent explicitly different kinds of static relations, such as generalization, aggregation, and association, among the objects in an FMS. PNs are used to model the dynamic behavior of the objects and the entire FMS and to conduct performance analysis. The use of PNs also leads to a method to identify the data structures and operations of software objects. The proposed method is illustrated through an FMS example. Its capability to support reusability, extendibility, and modifiability of the resulting control software design is also demonstrated when the FMS specifications change.     

Extending TINA with Secure On-Line Accounting Services

Concepts and principles of TINA (Telecommunications Information Networking Architecture) are introduced with the objective of correcting problems of the current centralized service control and service data model in an IN (Intelligent Network). It is becoming increasingly clear that the future sophisticated telecommunication services, e.g., multimedia, and multi-party conferencing, breaking away from the traditional telephony call model will need the solutions for rapid and efficient introduction, deployment, operations, and management.In this paper, we discuss accounting features and requirements, as well as security services in the TINA management context. We will introduce and present an implementation of a model for a security management, based on secure objects, cryptography and certificate distribution. In order to provide secure services, secure objects that have security functionality, such as authentication and access control, have been defined. Secure objects in our model are CORBA objects. The security domain is also called SBS (Security Base Server), provides security services and has an SMIB (Security Management Information Base) that contains security policies, cryptographic algorithms, and other relevant information. A prototype has been implemented and some experimental results are presented.     

反原形向量化与拟离散性

如何利用循环体诸如初值、终值、步长和下标式等数学对象的诸如恒等、正负、单调性一类的数学特征,按照严格推导出来的简单规则,绕过各种复杂的数据依赖关系图及其上诸如拓扑排序或等价变换等复杂的操作,直接从事向量化处理,这是极富实用价值的研究方向.文献[2,3,5]给出的可原形/准原形算法,以及本文的可反原形与拟离散性,正是这样的捷径.它们能使相当部分的常见循环,直接向量化.