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研究生: 洪俊安
Chun-An Hung
論文名稱: 在有限傳遞訊息下多屬性雙邊協商的學習
Learning in Multi Attribute Bilateral Negotiation under Bounded Number of Message
指導教授: 蘇豐文
Von-Wun Soo
口試委員:
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 資訊工程學系
Computer Science
論文出版年: 2001
畢業學年度: 89
語文別: 中文
論文頁數: 48
中文關鍵詞: 協商多屬性學習有限傳遞訊息
外文關鍵詞: negotiation, multi attribute, learning, bounded number of message
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  • 藉由網路社會的崛起,代理人技術已漸漸成為資訊科技發展的一個新的方向。在網路上過多的資訊使得代理人的角色變成由單純的資訊擷取、過濾轉變成必須與其它代理人合作,已達到各代理人的自己目標,而又因為各代理人有自己的目標而通常又不願意明白的展現自己的偏好,使得多代理人合作的難度變的更高。而協商方式便成了一種多代理人取得相互協議的方法。
    在此論文中,我們有興趣的是在於在代理人雙邊協商的角色中,如何在有限傳遞訊息的限制下達到一個共同的協議。因為時間的限制會迫使代理人讓步,而在讓步的同時間下,如何提出一個能夠更讓對方接受的建議是很重要的,一方面可更快達到最終的共同的協議,一方面也可以增加自己效用收益。在此前提下,我們設計了幾種類型的代理人進行模擬協商的實驗。在實驗結果所提供的證據顯示,當對方的行為模式是具有理性的時候,具有學習功能的代理人是能夠有效的減低傳遞訊息的次數,並且獲得更好的效用收益。而當對方出現不理性的行為時,學習功能並不能為代理人帶來更進一步的收益。


    In multi-agent coordination, the bilateral negotiation is an important and essential mechanism for agents to resolve the conflicts and enhance the global performance. However, since agents are usually rational, namely, they are always self-interested and seeking for their maximal expected utility payoff, they will tend to be protecting their own profit and utility during the negotiation. In addition, since the autonomous agents might have to choose the proper concessions and alternatives based on various multi-attribute utility functions during negotiation under bounded number of negotiation messages, it may lead to very inefficient and prolong process before both agents can reach their joint agreement. We assume rational agents are cooperative negotiators under the bounded number of messages. Namely, they are motivated to reach compromised agreement within the time bound in order to get as close to optimal solution as possible. Since agents could observe and learn from other agents’ negotiation proposal, agents could adapt during negotiation in order to speed up the negotiation process. Therefore we incorporate a learning mechanism into agents during the negotiation by using a simple perceptron learning method. We show by experiments that the learning agents can reach their joint agreement much faster than non-learning agents. Besides, the learning agents could reach the joint-agreements that always lie on the Pareto optimal frontier.

    ABSTRACT 4 CHAPTER 1 5 INTRODUCTION 5 1.1 BACKGROUND 5 1.2 PROBLEM DESCRIPTIONS 6 1.3 RELATED WORKS 9 1.4 ORGANIZATION OF THESIS 12 CHAPTER 2 14 A GENERIC AUTOMATED NEGOTIATION MODEL 14 2.1 NEGOTIATING AGENTS 14 2.2 NEGOTIATION PROTOCOL 16 2.3 NEGOTIATION OBJECTIVES 16 CHAPTER 3 18 THE NEGOTIATION MECHANISM 18 3.1 THE NEGOTIATION PROTOCOL 18 3.2 NOTATION OF NEGOTIATION 20 3.3 CREATING ACTION SPACE BY WEIGHTING NEGOTIATED ISSUES 20 3.4 THE BEHAVIOR OF AGENTS UNDER TIME PRESSURE 23 CHAPTER 4 25 THE CATEGORY OF AGENTS 25 4.1 THE AGENTS 25 4.1.1 Simple random agents 26 4.1.2 Rational agents 26 4.1.3 Cooperative agent 27 4.1.4 Learning agent 28 4.2 THE LEARNING METHOD 29 4.3 THE EVALUATION OF PERFORMANCE CRITERIA 31 CHAPTER 5 33 THE SETTING OF EXPERIMENTS 33 5.1 THE UTILITY FUNCTIONS OF AGENTS 33 5.2 THE CATEGORY OF OUR EXPERIMENT 34 5.3 THE SETTING OF EXPERIMENT 35 CHAPTER 6 36 RESULTS OF EXPERIMENT 36 6.1 THE AGENTS WITHOUT THE MESSAGE CONSTRAINT 36 6.2 THE NEGOTIATION UNDER MESSAGE CONSTRAINT 39 6.3 CONCLUSION 44 CHAPTER 7 45 CONCLUSION AND FUTURE WORK 45 REFERENCE 46

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