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基于本体论的农业知识的OWL描述 总被引:1,自引:1,他引:1
基于本体的信息交换特性,采用知识本体来表示农学领域知识。首先开发出农业知识本体;然后建立概念、概念之间的继承、实例,以及多种约束关系来表达高度共享和重用的农业领域知识;最后针对虚拟农作物生长系统开发平台中知识引擎对作物生长模型脚本的要求,用OWL描述了农业知识本体,通过实际应用,证明了该方法是可行且有效的。 相似文献
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数字孪生城市(Digital Twin City)的概念自提出之日起,便凭借其在虚拟空间、实体空间以及虚实空间之间的信息交互等方面的创新理念,而获得了来自学术界与产业界的极大关注。通过在虚拟数字空间构建数字孪生城市,作为物理城市在虚拟空间的镜像实体,实现对实体城市空间从宏观表象到微观细节的精准、全面、智能的数字化还原,从而为我国新型智慧城市的建立提供全新的思路与方法。 相似文献
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针对传统可靠性模型在武器装备体系建模中存在的描述能力不足和Petri网建模存在的模型爆炸和模型构建困难问题,引入面向对象建模思想,利用UML模型便于描述系统和对象Petri网模型易于动态仿真的优点,提出了基于UML-OOPN的武器装备体系任务可靠性建模方法,通过建立UML到对象Petri网的映射规则,完成了由任务描述模型向任务可靠性对象Petri网模型的转化,从而实现了两者有效结合,并以某野战防空反导体系为例验证了该方法的可行性和有效性,为解决武器装备体系任务可靠性模型构建和高效输入问题提供了一种新的方法. 相似文献
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企业应用集成和跨企业的应用集成是当前企业信息系统面临的主要挑战,不同应用或系统之间的数据、信息、知识的交换和共享成为研究的焦点.作为概念的规范,本体为领域内人员之间、应用系统之间的通信、信息交换和知识共享提供了一个公共语义平台,是信息集成、应用集成的重要使能技术.DAML+OIL、OWL等基于XML面向WEB的本体描述语言得到了广泛重视,但却存在由于缺乏标准的元建模体系结构而导致语义不清晰等问题,也缺乏必要的可视化建模标准.另一方面,相对成熟的统一建模语言(UML)有明确的模型层次,清晰的语义,已经在软件工程、业务建模等领域得到了广泛使用.本文针对OWL存在的问题,以UML为基础,开发了一个本体建模元模型以及模型元素的可视化表示法,并在开放源代码项目ArgoUML的基础上,实现了一个支持DAML+OIL和OWL的本体建模工具UBOM,支持软件开发人员基于UML开发自有本体库,实现语义使能的应用集成. 相似文献
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描述了一种新的基于射影空间的视频增强方法,通过图像间对极几何约束以及基础矩阵关系,实现三维图形对象和视频叠加。该方法采用了Pinhole像机模型和射影几何约束条件方便地实现虚拟物体的重投影,而且不需要像机的标定参数和环境对象的3D位置,克服了仿射空间近似所带来的视觉误差和使用限制。 相似文献
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Interactive Human Intention Reading by Learning Hierarchical Behavior Knowledge Networks for Human‐Robot Interaction
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For efficient interaction between humans and robots, robots should be able to understand the meaning and intention of human behaviors as well as recognize them. This paper proposes an interactive human intention reading method in which a robot develops its own knowledge about the human intention for an object. A robot needs to understand different human behavior structures for different objects. To this end, this paper proposes a hierarchical behavior knowledge network that consists of behavior nodes and directional edges between them. In addition, a human intention reading algorithm that incorporates reinforcement learning is proposed to interactively learn the hierarchical behavior knowledge networks based on context information and human feedback through human behaviors. The effectiveness of the proposed method is demonstrated through play‐based experiments between a human and a virtual teddy bear robot with two virtual objects. Experiments with multiple participants are also conducted. 相似文献
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遥操作机器人系统中虚拟环境的构建 总被引:4,自引:1,他引:4
虚拟环境的建模是基于虚拟现实的遥操作机器人系统的关键技术。根据遥操作机器人系统中虚拟环境的组成结构,创建了虚拟机器人和弹性体作业对象的几何模型、运动模型和物理模型,推导了基于弹簧质点模型的弹性体受力和形变的基本方程,并介绍了虚拟现实系统的主要人机接口设备,最后建立了由数据手套控制的机器人抓取弹性小球的虚拟环境的模型。 相似文献
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针对网络管理中的策略生成问题,提出一种基于本体模型的网络管理策略生成方法。该方法首先建立由业务、网元、传输和目标四种基本类,以及这些类之间关系构成的本体模型;然后根据网络管理目标解析目标类子类之间的关系以及目标类与业务、网元和传输类之间的关系,得到网络管理目标与本体模型各类的关联知识;最后通过对这些关联知识进行常数筛除和规划优化后生成相应的网络管理策略。通过一个基于OPNET的仿真实验验证了网络管理策略生成方法的有效性和可行性。 相似文献
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提出RFID数据集成中间件概念.为了不改变现有各数据库局部模式,提供各数据库的全局模式,将MAS和分布式数据技术结合,提出基于Agent的关系数据库访问技术的联邦模式虚拟集成法.该虚拟集成法基于本体构建分布式数据库;针对网络环境,基于CIAgent开发包研究设计分布式智能代理DIAgent,用KQML语言描述DIAgent间协作通信过程,由多个协作DIAgent构建GDBMS.实现了油田企业数据集成,系统运行稳定可靠. 相似文献
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Ontology Management in Enterprises 总被引:2,自引:0,他引:2
In today's increasingly competitive business market, many large organisations have begun to research and develop flexible enterprises in order to be able to quickly respond to market opportunities. They are seeking ways to maximise the power of information assets stored across hundreds of their databases and application programs by bringing them into open interoperable environments. However, this effort has been seriously hindered by various kinds of heterogeneity. Each system has its own domain model for its environment and efficient task operations. However, in order for systems to communicate and co-operate effectively, a shared domain model is required. The semantics of the common, and each local, model must be captured explicitly and formally to enable meaningful information exchange.The semantics of diverse information resources are captured by ontologies — definitions of terms as used in data sources, i.e. concepts and the relationships between concepts. When defining the relationships between data sources, we rely on ontologies to make the meaning of the different vocabularies used explicit. This paper explores the role of ontologies in enterprises, and proposes a methodology for managing enterprise ontology resources and a suite of support tools. 相似文献
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This paper presents a new technique to extract objects from a real complex background so that a video sequence can be decomposed
into a set of objects as required for object oriented video compression techniques. The proposed method is based on a background
subtraction technique. However, instead of using a fixed background, the system relies on predicting one from a previously
constructed virtual model of the environment. Thus, camera movements are allowed. These movements are estimated by means of
a tracker device. We also present the virtual model construction technique for indoor environments. The method has been successfully
tested for several different video sequences including capture errors, partially mapped virtual environments and camera positioning
errors. Further work will focus on extending the virtual models not only to environment, but also to objects, and integrating
the method in a MPEG4 standard compression system. 相似文献
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对网格环境下基于本体的专家系统(Expert System)进行了研究,提出了构建在通用知识网格(Universal Knowledge Grid,UKG)和开放网格业务体系结构(Open Grid Services Architecture,OGSA)基础上的专家系统模型。为网格环境下创建大规模分布式基于本体知识库体系的专家系统提供了参考模型。 相似文献
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A concept for a new business communication environment consisting of a shared and interactive multiuser virtual space that consists of a computer-graphics-based virtual space and video-based objects is proposed. This combination results in an extremely flexible environment for remote human collaboration. The human interface, which entails walking and interacting within the virtual space and offers a new dimension in daily communication activities, is described 相似文献