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1.
人工免疫中B细胞和T细胞的协同演化方法   总被引:2,自引:0,他引:2  
在机体免疫系统中,B淋巴细胞和T淋巴细胞协同起来识别抗原。B细胞在初次识别到抗原后,以较高的概率进行变异和自我复制,形成新的识别能力,使得免疫系统具有高的适应性;T细胞则负责协同B细胞进行免疫识别。该文借鉴B、T细胞的免疫机制,提出了一个B识别器和T识别器—BT协同识别方法。并详细描述了BT识别器协同识别抗原、二次识别反应的演化过程。该模型克服了一般反向选择算法误识别率高的缺点,同时又保证了系统的动态适应性。  相似文献   

2.
依据生物免疫的防御层次结构,分析了网络入侵的多层防御体系.引入生物学中残余抗原理论,结合入侵检测过程中存在的残余抗原,提出了一种新的基于残余抗原理论的动态记忆算法.在此基础上,分析了算法的设计思想,给出了算法的具体实现过程.实验数据表明:该算法实现了识别器记忆的动态性和持久性,并且能够提高系统资源的利用率.  相似文献   

3.
符海东  李雪 《计算机应用》2007,27(9):2160-2162
将数据场理论引入到计算机免疫的研究中,设计了一种识别器的构造方法及其动态识别算法。抗体的培育是建立在不完全自体集的基础上,算法可以识别出未知自体,降低自免疫反应发生的概率,并通过动态识别算法完善抗体集,克服了现有的入侵检测系统对自体集要求较高的局限性,简化了克隆变异以及记忆机制的实现方法。实验表明:新的免疫动态识别方法使入侵检测系统具有更高的动态平衡性和自适应性。  相似文献   

4.
免疫识别器动态覆盖性的选择策略   总被引:1,自引:0,他引:1  
免疫识别器的浓度、系统资源占用与人工免疫系统的有效性具有重要的关联关系。在尽可能少地占用系统资源,即降低识别器浓度的前提下,为了更有效地识别NONSELF,保证识别器的动态覆盖性是关键。文章根据机体免疫学的动力学原理,提出了一种动态选择算法,通过对识别器的优胜劣汰提高识别器集合的整体识别能力。  相似文献   

5.
王思鹏 《微机发展》2006,16(6):187-190
以机体免疫思想的人工免疫系统作为一种动态自适应的方法,可以更好地解决传统的网络防御方法的被动、静态等缺点。引入云模型的概念,提出了人工免疫系统中云识别的理论,即根据环境的需要用多个识别器对不确定性抗原进行联合云识别,以达到降低伪肯定率和伪否定率的目的。  相似文献   

6.
为了降低应用于突发事件监测的无线传感器网络的能量消耗,设计实现了一种基于事件驱动的动态免疫分簇路由算法。将生物免疫系统的工作机制应用到无线传感器网络事件驱动的动态分簇算法中,事件作为抗原,传感器节点作为抗体,抗体对抗原有记忆保存的功能,使得相似的抗原再次出现时对事件及时响应。相似事件再次发生且传感器节点符合能量要求时,可以直接调用抗体中的记忆,对事件进行快速建簇,节省了簇的建立过程所消耗的大量能量,增加了网络的数据传输量,延长了网络的生命周期。仿真结果表明,生物免疫机制的学习记忆特性可以有效提高事件驱动的动态分簇算法的网络性能。  相似文献   

7.
基于云模型的识别技术   总被引:1,自引:0,他引:1  
以机体免疫思想的人工免疫系统作为一种动态自适应的方法,可以更好地解决传统的网络防御方法的被动、静态等缺点。引入云模型的概念,提出了人工免疫系统中云识别的理论,即根据环境的需要用多个识别器对不确定性抗原进行联合云识别,以达到降低伪肯定率和伪否定率的目的。  相似文献   

8.
免疫识别器的动态覆盖与人工免疫系统的有效性具有重要的关联关系,应该用尽可能少的识别器覆盖尽可能多的NONSELF空间。根据识别器的动态覆盖性原理,引入逻辑程序来表示免疫识别器,并运用逻辑程序的更新特性,试图消除识别器所识别出的NONSELF空间的冗余,降低识别器的浓度,增强识别器的动态覆盖性。  相似文献   

9.
李涛  刘赛  苏贝 《微机发展》2006,16(7):29-31
免疫记忆模型对人工免疫具有重要的作用。文中详细研究了两种免疫记忆模型:记忆细胞模型和残余抗原模型。并对这两种模型进行了详细的分析和对比。最后,对残余抗原模型进行了改进,从而实现了残余抗原的动态性。  相似文献   

10.
人工免疫记忆模型研究   总被引:1,自引:0,他引:1  
免疫记忆模型对人工免疫具有重要的作用。文中详细研究了两种免疫记忆模型:记忆细胞模型和残余抗原模型。并对这两种模型进行了详细的分析和对比。最后,对残余抗原模型进行了改进.从而实现了残余抗原的动态性。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
正The 34th Chinese Control Conference and SICE Annual Conference 2015(CCCSICE2015)is organized by the Technical Committee on Control Theory(TCCT)of Chinese Association of Automation(CAA)and the Society of Instrument and Control Engineers(SICE)of Japan,and locally organized by Hangzhou Dianzi University(HDU).  相似文献   

20.
该文利用DF与CHI统计量相结合的特征选取方法,针对互联网上对外汉语相关领域的网页进行特征提取,并在此基础上,构建了基于标题与正文相结合的两步式主题相关度判定分类器。基于该分类器做对外汉语相关主题的网页爬取工作,实验表明,效率和召回率比传统分类器都有较大程度的提高,目前该分类器已经用于为大型对外汉语语料库构建提供数据源。  相似文献   

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