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Feature-Denoising Based on Average Fitness of Genetic Population 基于遗传群体平均适应度的特征去噪
Pub Date : 2010-10-31 DOI: 10.4156/JCIT.VOL5.ISSUE8.18
Yong-qing Wei, Ming-ying Xu, Zhen-fang Zhu
To solve the problem of the noise existed in feature items of category template in filtering system, weight adjusting strategy based on average fitness of population is proposed combining genetic algorithm with feedback. The feature items’ contribution to individual fitness is studied to adjust feature items’ weight by the genetic difference in the average fitness of the individual. Experimental results show that the weight adjusting strategy could significantly optimize filtering effect.
针对过滤系统中类别模板特征项存在噪声的问题,提出了基于总体平均适应度的权重调整策略,并将遗传算法与反馈相结合。研究特征项对个体适应度的贡献,通过个体平均适应度的遗传差异来调整特征项的权重。实验结果表明,权重调整策略能显著优化滤波效果。
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引用次数: 1
Adaptive Optical Wireless Networks: End-to-End Link Delay Optimization 自适应无线光网络:端到端链路延迟优化
Pub Date : 2010-10-01 DOI: 10.4156/JCIT.VOL5.ISSUE8.1
A. Mahdy, J. Deogun
Wireless communications offer an attractive option for many military, commercial as well as personal communication needs because of flexibility, cost effectiveness, and mobility. The quality features of wireless communications have led to tremendous growth in the demand for wireless networks and has led to development of novel technologies that raise the need for broadband wireless communications. Optical wireless systems offer high transmission rates that can accommodate these broadband needs. However, optical wireless links can be prone to atmospheric changes that can result in performance degradation. Therefore, optical wireless networks should have flexible links and must be adaptive. In this paper, we focus on the adaptability of optical wireless networks and propose new heuristics for the optimization of communication delay in a flexible link regime for networks with bounded and unbounded degree transceivers. Extensive simulations are conducted to evaluate the performance of the proposed heuristics to validate the improvement in network functionality as compared to the inadaptable environment. Simulation results show that networks adopting proposed heuristics achieve a 50% reduction in average packet delay as compared to inadaptable networks.
由于灵活性、成本效益和移动性,无线通信为许多军事、商业和个人通信需求提供了一个有吸引力的选择。无线通信的高质量特性导致了对无线网络需求的巨大增长,并导致了对宽带无线通信需求的新技术的发展。光学无线系统提供高传输速率,可以满足这些宽带需求。然而,光学无线链路容易受到大气变化的影响,从而导致性能下降。因此,光无线网络必须具有灵活的链路和自适应能力。在本文中,我们关注光无线网络的适应性,并提出了在有界度和无界度收发器网络中灵活链路体制下的通信延迟优化的新启发式方法。我们进行了大量的仿真来评估所提出的启发式算法的性能,以验证与不适应环境相比,网络功能的改进。仿真结果表明,与非自适应网络相比,采用启发式算法的网络平均数据包延迟降低了50%。
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引用次数: 6
Prevention and Control Model of Enterprise Business Risk Based on Multi-Agent 基于多agent的企业业务风险防控模型
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.19
Hongjun Guan
Prevention and control of business risk plays an important role to strengthen enterprise management. Multi-agent is introduced to risk prevention and control according to the classification of the properties of risk events. Multi-agent system is composed of risk prevention and control agent, management agent and assistant agent. Through the communication and collaboration of multi-agent, the distributed architecture of business risk prevention and control model based on multi-agent is built to control the business risk. At last, JADE solution is described.
防范和控制企业风险对加强企业管理具有重要作用。根据风险事件的性质分类,将多智能体引入到风险防控中。多主体系统由风险防控主体、管理主体和辅助主体组成。通过多智能体的通信与协作,构建基于多智能体的业务风险防控模型的分布式体系结构,实现对业务风险的控制。最后介绍了JADE解决方案。
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引用次数: 4
Clearing Policy for an Specialist Agent in Marketing Strategies 营销策略中专家代理的清算政策
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.10
H. MiriamSalcedo, D. V. Ayala, F. López, M. J. S. García
This work discusses clearing policy used by a specialist agent on marketing strategies under the rules of TAC CAT agents International Tournament. The goal of this agent is to create a market and then establish a set of policies for controlling agents’ behavior of other agents interested in trade with him. This agent must be able to establish accepting, prices, charging and clearing. Clearing policy determines how and when to clear the market, that is, how to match accepted shouts, and when to perform transactions over already matched shouts. A clearing policy implementation is proposed and the impact of it over number of matched shouts, number of transactions and traders attracted during a CAT game simulation is analyzed.
本文讨论了在TAC CAT代理商国际锦标赛规则下,专家代理商在营销策略上使用的清算策略。这个代理的目标是创造一个市场,然后建立一套政策来控制其他有兴趣与他交易的代理的行为。这个代理必须能够建立接受,价格,收费和清算。清算政策决定了如何以及何时清算市场,也就是说,如何匹配已接受的吆喝,以及何时在已经匹配的吆喝上执行交易。提出了一种清算策略的实现方法,并分析了该策略对CAT游戏模拟过程中匹配呼喊数、交易数和吸引的交易者数量的影响。
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引用次数: 2
A Privacy-Preserving Mutual Authentication Protocol for Vehicle Ad Hoc Networks 一种保护车辆自组织网络隐私的互认证协议
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.24
Zuowen Tan
Recently, Jung et al. proposed a robust conditional privacy-preserving authentication protocol in vehicle ad-hoc networks. However, Jung et al.’s authentication protocol cannot provide unlinkage and mutual authentication during the communications between the vehicles and the road-side infrastructure units. In this paper, we propose an improved privacy-preserving mutual authentication protocol for vehicle ad hoc networks by using secure identity-based group blind signature, the private encryption system and the public encryption system. The proposed privacy-preserving mutual authentication protocol for vehicle ad-hoc networks satisfies mutual authentication, anonymity and unlinkability under Random Oracle Model and the Decisional Bilinear Diffie–Hellman (DBDH) assumption. In addition, the trusted center can trace malicious on-board units or road-Side infrastructure units in our protocol.
最近,Jung等人在车辆自组织网络中提出了一种鲁棒的条件隐私保护认证协议。然而,Jung等人的认证协议不能在车辆与路边基础设施单元之间的通信过程中提供非联动和相互认证。本文提出了一种改进的基于安全身份的组盲签名、私有加密系统和公共加密系统的车辆自组网互鉴协议。提出的车辆自组织网络互认证协议满足随机Oracle模型下的互认证、匿名性和不可链接性以及决策双线性Diffie-Hellman (DBDH)假设。此外,可信中心可以在我们的协议中跟踪恶意的车载单元或路边基础设施单元。
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引用次数: 12
Three-Dimensional Finite Element Analysis of Wall Pressure on Large Diameter Silos 大直径筒仓壁压力的三维有限元分析
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.15
Fu Jianbao, M. Luan, Yang Qing, Nian Tingkai
With the increasing volume demand of silos, silo diameters are bigger and bigger. However, present wall pressure computation methods are mostly based on small diameter silos. There is little system research on large diameter silos. To solve this problem, systematical research by three-dimensional finite element method on large diameter silos was carried out in this paper. Static wall pressure and wall pressure at the end of filling were analyzed. And the influence of mechanical parameters of bulk materials to wall pressure was studied. Two lamination ways to simulate filling process was studied. The result shows that scale of silo take important effect to wall pressure. Wall pressures at the end of filling of large diameter silos are much larger than static wall pressures near silos bottom. Wall pressure of filling should be considered in design of large diameter silos. Study in this paper has heavy theoretical significance and provide an important basis for the large diameter silo design.
随着筒仓容积需求的增加,筒仓直径也越来越大。然而,现有的筒仓壁压计算方法大多基于小直径筒仓。大直径筒仓的系统研究很少。为了解决这一问题,本文采用三维有限元方法对大直径筒仓进行了系统的研究。分析了静壁压力和充填末壁压力。并研究了块体材料力学参数对壁压的影响。研究了两种层压模拟填充过程的方法。结果表明,筒仓尺寸对筒仓壁压力有重要影响。大直径筒仓充填末端的壁压远大于筒仓底部附近的静壁压。在大直径筒仓的设计中,应考虑筒仓的壁压。本文的研究具有重要的理论意义,为大直径筒仓的设计提供了重要的依据。
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引用次数: 11
Model Counting with Boolean Algebra and Extension Rule 布尔代数与可拓规则的模型计数
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.7
Youjun Xu, D. Ouyang, Yuxin Ye
Model counting is an important problem in artificial intelligence and is applied in several areas of information science. Extension rule is a method which could be used to count models. But it’s not appropriate when clause length is short or clause number is huge. After studying extension rule, we found that the satisfiability problem could be solved by hitting set algorithms. And the models could be counted with extension rule after calculating hitting sets of a clause set. Therefore, we proposed an algorithm MCBE in this paper. With Boolean algebra, MCBE could easily calculate hitting sets of a clause set. Then, it gives the number of models with extension rule. The test results show that when clause length is short and clause number is big enough, the algorithm is more efficiency than the algorithm CDP and CER.
模型计数是人工智能中的一个重要问题,在信息科学的许多领域都有应用。可拓规则是一种对模型进行计数的方法。但在条款长度较短或条款数量较大的情况下就不适用了。通过对可拓规则的研究,发现可满足性问题可以用命中集算法求解。在计算子句集的命中集后,用可拓规则对模型进行计数。因此,本文提出了一种MCBE算法。利用布尔代数,MCBE可以很容易地计算子句集的命中集。然后给出了具有扩展规则的模型个数。测试结果表明,当子句长度较短且子句数量足够大时,该算法比CDP和CER算法效率更高。
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引用次数: 3
Modelling of Electrohydraulic System Using RBF Neural Networks and Genetic Algorithm 基于RBF神经网络和遗传算法的电液系统建模
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.4
Guoqiang Cai, Zhongzhi Tong, Z. Xing
This paper presents an approach to model the nonlinear dynamic behaviors of the Automatic Depth Control Electrohydraulic System (ADCES) of a certain mine-sweeping weapon using Radial Basis Function (RBF) neural networks. In order to obtain accurate RBF neural networks efficiently, a hybrid learning algorithm is proposed to train the neural networks, in which centers of neural networks are optimized by genetic algorithm, and widths and centers of neural networks are calculated by linear algebra methods. The proposed algorithm is applied to the modelling of the ADCES, and the results clearly indicate that the obtained RBF neural network can emulate the complex dynamic characteristics of the ADCES satisfactorily. The comparison results also show that the proposed algorithm performs better than the traditional clustering-based method.
提出了一种利用径向基函数(RBF)神经网络对某型扫雷武器自动深度控制电液系统(ADCES)的非线性动力学行为进行建模的方法。为了有效地获得精确的RBF神经网络,提出了一种混合学习算法来训练神经网络,该算法采用遗传算法优化神经网络的中心,采用线性代数方法计算神经网络的宽度和中心。将该算法应用于ADCES的建模,结果表明,所得到的RBF神经网络能够较好地模拟ADCES的复杂动态特性。对比结果也表明,该算法的性能优于传统的基于聚类的方法。
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引用次数: 11
GPS/TDOA Hybrid Location Algorithm Based on Federal Kalman Filter 基于联邦卡尔曼滤波的GPS/TDOA混合定位算法
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.6
Cui-Xia Li, Wei-Ming Liu, Zi-Nan Fu
Generally, accuracy of GPS(Global Positioning System) is higher than that of cellular network. But in tall building urban area or indoor, relatively weak GPS signal makes the positioning unstable and inaccurate. TDOA(Time Difference of Arrival) is one of the most widely used positioning methods in cellular mobile communication systems, but its accuracy is not high enough to meet the growing demand. In urban where there are more base stations to support big communication capacity than in rural, the mobile terminal positioning accuracy and stability is relatively better. In order to make up for these inherent deficiency of GPS or TDOA separate positioning, this paper deduces a GPS/TDOA hybrid positioning algorithm based on federated kalman filter by giving error model, state equation and measurement equation of each local kalman filters. Simulation results show that the algorithm effectively improves the data fusion reliability and positioning accuracy.
一般来说,GPS(Global Positioning System,全球定位系统)的精度要高于蜂窝网络。但在高楼林立的城区或室内,GPS信号相对较弱,定位不稳定,定位不准确。TDOA(Time Difference of Arrival)是蜂窝移动通信系统中应用最广泛的定位方法之一,但其精度不足以满足日益增长的需求。在城市中,基站较多,需要支持较大的通信容量,因此移动终端的定位精度和稳定性相对较好。为了弥补GPS/TDOA单独定位的这些固有缺陷,本文通过给出各局部卡尔曼滤波器的误差模型、状态方程和测量方程,推导出一种基于联邦卡尔曼滤波器的GPS/TDOA混合定位算法。仿真结果表明,该算法有效地提高了数据融合的可靠性和定位精度。
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引用次数: 12
Research of Information Framework for Fourth Party Logistics 第四方物流信息框架研究
Pub Date : 2010-09-30 DOI: 10.4156/JCIT.VOL5.ISSUE7.12
Tiejun Pan, Leina Zheng, Guoqing Yan
The Fourth Party Logistics (4PL) information system used today is comprised of disconnected legacy system, and lacks the support for interoperability for whole supply chain integration. This situation often prevents the 4PL provider from fully exploring market opportunities in a timely fashion. To address this problem, we propose an agent-based framework for intelligent 4PL integration. A set of agents with core capabilities can be quickly assembled to help with the gathering of relevant information and knowledge, to cooperate with each other and with other legacy systems and human managers and analysts to arrive at timely decisions in dealing with various logistics scenarios. The proposed multi-agent system (MAS), including its theoretical foundation, architecture, and implementation are presented. In the end, we point out the cloud computing and Internet of things will be the research direction of 4PL information framework in the future and the next-generation broadband wireless mobile communications network will bring out the new generation of 4PLIF solution with mobile MAS.
目前使用的第四方物流(4PL)信息系统是由不连贯的遗留系统组成的,缺乏对整个供应链集成的互操作性支持。这种情况往往使第四方物流供应商无法及时充分探索市场机会。为了解决这个问题,我们提出了一个基于代理的智能第四方物流集成框架。一组具有核心能力的代理可以快速组合起来,帮助收集相关信息和知识,相互合作,并与其他遗留系统、人力管理人员和分析人员合作,在处理各种物流场景时及时做出决策。介绍了多智能体系统的理论基础、体系结构和实现方法。最后指出云计算和物联网将是未来4PL信息框架的研究方向,下一代宽带无线移动通信网络将带来具有移动MAS的新一代4PLIF解决方案。
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引用次数: 9
期刊
J. Convergence Inf. Technol.
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