Web Intell. Agent Syst.最新文献_第5页

Interplay of ethical trust and social moral norms: Environment modelling and computational mechanisms in agent-based social simulation (ABSS) 伦理信任与社会道德规范的相互作用:基于主体的社会模拟(ABSS)中的环境建模与计算机制

Web Intell. Agent Syst. Pub Date : 2011-12-01 DOI: 10.3233/WIA-2011-0225

Hock Chuan Lim, Rob Stocker, M. Barlow, Henry Larkin

引用次数: 3

Full discrimination of subtopics in search results with keyphrase-based clustering 基于关键词聚类的搜索结果中子主题的完全区分

Web Intell. Agent Syst. Pub Date : 2011-12-01 DOI: 10.3233/WIA-2011-0222

Claudio Carpineto, M. D'Amico, Andrea Bernardini

{"title":"Full discrimination of subtopics in search results with keyphrase-based clustering","authors":"Claudio Carpineto, M. D'Amico, Andrea Bernardini","doi":"10.3233/WIA-2011-0222","DOIUrl":"https://doi.org/10.3233/WIA-2011-0222","url":null,"abstract":"We consider the problem of retrieving multiple documents relevant to the single subtopics of a given web query, termed “full-subtopic retrieval”. To solve this problem we present a novel search results clustering algorithm that generates clusters labeled by keyphrases. The keyphrases are extracted from the generalized suffix tree built from the search results and merged through an improved hierarchical agglomerative clustering procedure. Our approach has been implemented into KeySRC (Keyphrase-based Search Results Clustering), a full web clustering engine available online at http://keysrc.fub.it. We discuss how the keyphrase-based clustering algorithm can be used not only for browsing through the clustered search results but also for producing a re-ranked list of results emphasizing the diversity of top hits. Using a novel measure for evaluating full-subtopic retrieval performance, called “Subtopic Search Length under k document sufficiency”, and a test collection specifically designed for evaluating subtopic retrieval, we found that our approach was able to discriminate between the different subtopics present in search results in a very effective manner, with a clear improvement over other subtopic retrieval systems. In particular, browsing through KeySRC clusters was the best method to retrieve more documents per subtopic (i.e., k>1), whereas using the re-ranked list formed from KeySRC clusters was more effecive for retrieving just one document per subtopic (i.e., k=1).","PeriodicalId":263450,"journal":{"name":"Web Intell. Agent Syst.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122381968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Improving agent interoperability via the automatic enrichment of multi-category ontologies 通过自动丰富多类别本体来提高代理的互操作性

Web Intell. Agent Syst. Pub Date : 2011-12-01 DOI: 10.3233/WIA-2011-0220

Salvatore Garruzzo, G. Quattrone, D. Rosaci, D. Ursino

{"title":"Improving agent interoperability via the automatic enrichment of multi-category ontologies","authors":"Salvatore Garruzzo, G. Quattrone, D. Rosaci, D. Ursino","doi":"10.3233/WIA-2011-0220","DOIUrl":"https://doi.org/10.3233/WIA-2011-0220","url":null,"abstract":"Ontologies significantly enhance the possibility to make agent-based Web applications really “semantic”. However, in order to make their usage both effective and efficient, some alignment problems, arising from the presence of semantic heterogeneities among them, should be solved. Recent approaches introduced the possibility to face these problems by allowing agents to negotiate the meanings of the terms contained in their ontology and exchanged among them. This solution appears significantly effective but not particularly efficient since its computational cost increases linearly against the number of agents belonging to the community. This paper proposes a new framework aiming at solving efficiently ontology alignment problems; for this purpose, it exploits: (i) a light bilateral negotiation procedure which allows an agent to understand a message coming from another agent correctly, (ii) a global ontology, which avoids heavy semantic negotiation activities, (iii) an ontology enrichment algorithm, which allows ontology alignment to be performed with an effectiveness comparable with that obtained by semantic negotiation approaches, and (iv) a new ontology model supporting efficient and effective communication activities among agents.","PeriodicalId":263450,"journal":{"name":"Web Intell. Agent Syst.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125134959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Let's dans! An analytic framework of negotiation dynamics and strategies 让我们在!谈判动态与策略分析框架

Web Intell. Agent Syst. Pub Date : 2011-12-01 DOI: 10.3233/WIA-2011-0221

K. Hindriks, C. Jonker, D. Tykhonov

{"title":"Let's dans! An analytic framework of negotiation dynamics and strategies","authors":"K. Hindriks, C. Jonker, D. Tykhonov","doi":"10.3233/WIA-2011-0221","DOIUrl":"https://doi.org/10.3233/WIA-2011-0221","url":null,"abstract":"The “negotiation dance”, as Raiffa calls the dynamic pattern of the bidding, has an important influence on the outcome of the negotiation. The current practice of evaluating a negotiation strategy is to focus on fairness and quality aspects of the agreement. In this article we present the framework DANS (Dynamics Analysis of Negotiation Strategies) for the analysis of the dynamic patterns of the bidding as a means to evaluate the strengths and weaknesses of negotiation strategies for bidding. The method provides the tools to perform a detailed and quantified analysis of a negotiation between two agents in terms of dynamic properties of the negotiation trace. The classification of negotiation steps in the dance plays a central role in the analysis. The method can be applied to tournaments, but can also be used to analyze single 1-on-1 negotiation sessions. The sessions can be played by humans or by software agents. Using DANS we show that some strategies are sensitive to the bidding behaviour of the opponent, and some depend on a correct model of the opponent. DANS helped us in discovering that domain characteristics are important for the analysis of strategies. Some strategies rely heavily on some domain assumptions. Furthermore, the results illustrate that having domain knowledge is not always enough to avoid making unintentional steps. The method is demonstrated in the analysis of three strategies from the literature ABMP, Trade-Off and Bayesian Agent.","PeriodicalId":263450,"journal":{"name":"Web Intell. Agent Syst.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121060541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Social control in a normative framework: An adaptive deterrence approach 规范框架中的社会控制:适应性威慑方法

Web Intell. Agent Syst. Pub Date : 2011-12-01 DOI: 10.3233/WIA-2011-0224

Henrique Lopes Cardoso, E. Oliveira

{"title":"Social control in a normative framework: An adaptive deterrence approach","authors":"Henrique Lopes Cardoso, E. Oliveira","doi":"10.3233/WIA-2011-0224","DOIUrl":"https://doi.org/10.3233/WIA-2011-0224","url":null,"abstract":"Normative environments are used to regulate multi-agent interactions, by providing means for monitoring and enforcing agents' compliance with their commitments. In business encounters, agents representing business entities make contracts including norms that prescribe what agents should do. Agent autonomy, however, gives agents the ability to decide whether to fulfill or violate their commitments. In particular, when the normative space is imperfect, contracts to which norms apply may be unbalanced, making it individually rational for agents to exploit potential flaws to their own advantage. In this paper we present and analyze an approach for exerting social control within a normative environment. An adaptive mechanism is proposed that enables a normative framework to change deterrence sanctions according to the behavior of an agent population, in order to preclude agents from exploiting potential normative flaws. The system tries to avoid institutional control beyond what is strictly necessary, seeking to maximize agent contracting activity while ensuring a certain commitment compliance level, when agents have unknown risk and social attitudes. We analyze how the adaptive deterrence sanctioning model responds to different agent populations, which are characterized by predominant risk tolerance or social awareness degrees. We show that risk-averse or socially concerned populations cause lesser deterrence sanctions to be imposed by the normative system.","PeriodicalId":263450,"journal":{"name":"Web Intell. Agent Syst.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134639909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

An adaptive approach for the determination of the itinerary of imprecise mobile agents with timing constraints 一种具有时间约束的不精确移动智能体路线确定的自适应方法

Web Intell. Agent Syst. Pub Date : 2011-08-01 DOI: 10.3233/WIA-2011-0218

Luciana Rech, C. Montez, R. S. Oliveira

引用次数: 0

Concept abduction and contraction in semantic-based P2P environments 基于语义的P2P环境中的概念引申和概念收缩

Web Intell. Agent Syst. Pub Date : 2011-08-01 DOI: 10.3233/WIA-2011-0214

M. Ruta, E. Sciascio, F. Scioscia

引用次数: 45

Representing privacy regulations with deontico-temporal operators 用时态算子表示隐私规则

Web Intell. Agent Syst. Pub Date : 2011-08-01 DOI: 10.3233/WIA-2011-0215

G. Piolle, Y. Demazeau

引用次数: 12

Trust-based web service selection in virtual communities 基于信任的虚拟社区web服务选择

Web Intell. Agent Syst. Pub Date : 2011-08-01 DOI: 10.3233/WIA-2011-0216

Zhiqi Shen, Han Yu, C. Miao, J. Weng

引用次数: 40

A study of the impact of structure on cooperation in networks 网络结构对合作的影响研究

Web Intell. Agent Syst. Pub Date : 2011-08-01 DOI: 10.3233/WIA-2011-0219

Stephan Schosser, Klemens Böhm, B. Vogt

{"title":"A study of the impact of structure on cooperation in networks","authors":"Stephan Schosser, Klemens Böhm, B. Vogt","doi":"10.3233/WIA-2011-0219","DOIUrl":"https://doi.org/10.3233/WIA-2011-0219","url":null,"abstract":"The concern of this paper is that nodes in a distributed system cooperate. We demonstrate that adding structure to such systems can help to induce cooperation. ‘Adding structure’ means bounding the number of nodes a node can directly interact with - if two unconnected nodes wish to interact, they have to do so via a chain of intermediaries which are connected. To validate our claim, we analyze one specific system where structure has been added. Different methods exist for such analyses: Economists use behavioral experiments to study human behavior. Computer scientists rely on simulations, to obtain results that are robust and scalable. Both use game theory to arrive at formal results. Each approach in isolation has its disadvantages: Behavioral experiments do not allow analyzing many different combinations of parameter values and do not scale well. Game theory supports analyzing system equilibria, but may result in complex or even unsolvable models, in particular when considering system dynamics. Simulations rely on the intuition of the system designer - this is hazardous in strategic settings. We pursue a combination of these approaches and show that the degree of cooperation in our setting is high. More specifically, after having shown with behavioral experiments that humans tend to use cut-off strategies, we translate the strategies used into a game theoretic model and show that they yield an efficient equilibrium. Simulations show that the system reaches this equilibrium given random start populations if the rate of free riders is low. We conclude by saying how our work affects the design of distributed systems from a computer science perspective.","PeriodicalId":263450,"journal":{"name":"Web Intell. Agent Syst.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125654800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1