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This paper mainly narrates the concepts of object-oriented method and design pattern,with a concrete project—the work schedule module design demonstrates the factory method and state pattern used in the project.

主要阐述了软件的面向对象方法和设计模式的概念,并结合具体的软件项目讲述了工厂方法模式和状态模式在电厂工作票模块设计中的运用。

In DCS(Distributed Control System) the main control software is very important,so in order to improve it s stability extensibility and universality,a universal layered model was established with design patterns such as the state machine,MVC(Model View and Controller),state pattern and so on.

主控软件在集散控制系统中占有举足轻重的地位,为了提高它的稳定性、可扩展性和通用性,采用状态机、MVC(Model Viewand Controller)、状态模式等设计模式为它建立了一个通用的分层模型。

The basic conception of the state pattern is introduced in this paper,explain the relationship between state and procedure,and discuss the application of state pattern in the state-machine of workflow,and also give a concrete example at last.

介绍了状态模式的基本概念,阐述了状态与流程之间的关系,探讨了其在工作流状态机中的应用,最后给出了一个工作流状态机实现的具体例子,为工作流系统中运行服务模块的设计提供了解决思路。

Workflow instances migration approach based on state;

基于状态的工作流实例迁移方法

Characteristics of variation for annual runoff state based on set pair analysis;

基于集对原理的年径流状态时序变化特性分析

Applications of PLC original state instruction in manipulator control system;

PLC初始状态指令在机械手控制系统中的应用