An interactive agent-based system for concept-based web search

Search engines are useful tools in looking for information from the Internet. However, due to the difficulties of specifying appropriate queries and the problems of keyword-based similarity ranking presently encountered by search engines, general users are still not satisfied with the results retrieved. To remedy the above difficulties and problems, in this paper we present a multi-agent framework in which an interactive approach is proposed to iteratively collect a user's feedback from the pages he has identified. By analyzing the pages gathered, the system can then gradually formulate queries to efficiently describe the content a user is looking for. In our framework, the evolution strategies are employed to evolve critical feature words for concept modeling in query formulation. The experimental results show that the framework developed is efficient and useful to enhance the quality of web search, and the concept-based semantic search can thus be achieved.     

Negotiating Dialogue Games

Recently in the field of agent communication, many authors have adopted the view of interaction as a joint activity regulated by means of dialogue games. It is argued in particular that this approach should increase the flexibility of dialogues by allowing a variety of game compositions. In this research note, we present a framework suited to this feature. A preliminary attempt to capture the negotiation phase (which allows agents to agree upon the dialogue game currently regulating their conversation) is discussed.     

提升小波实现技术的优化改进

回顾了提升小波的发展，以及它在信号处理领域的广泛应用，讨论了在实际应用中考虑节约存储器容量、提高硬件利用率和增加处理速度等便于VLSI实现因素而进行的改进措施。     

生长抑素及其类似物的标记技术的发展

生长抑素受体显像剂是临床上应用最为普遍的放射性多肽类受体显像剂。用多种放射性同位素^111In、^90Y、^6Ga、^68Ga、^64Cu或是用^99Tc^m、^188Re以及卤族同位素^123I、^18F等对奥曲肽及其类似物进行标记得到的放射性多肽药物，已广泛用于临床显像。介绍了生长抑素类似物及标记技术的发展，对目前临床上比较成熟的生长抑素类显像剂做了综述和比较。同时介绍了目前在SST类似物开发领域及生物行为研究领域中的最新发展动态。     

居住区环境设计新思维初探──跨世纪住宅设计竞赛的思考与研究

本文结合’96上海国际住宅设计竞赛方案，就居住区环境设计的理论与方法进行了探讨。     

腐植酸造粒粘合剂的研究

给出了用不同粘合剂制备颗粒状腐植酸的试验结果。研究表明，腐植酸钠作为造粒的粘合剂，具有良好的综合指标。当其加入量为腐植酸含量的４％￣５％时，颗粒状腐植酸制成品抗冲击指数达到８２％以上，磨损指数低于８．８％。     

State-variable planning under structural restrictions: algorithms and complexity

Computationally tractable planning problems reported in the literature so far have almost exclusively been defined by syntactical restrictions. To better exploit the inherent structure in problems, it is probably necessary to study also structural restrictions on the underlying state-transition graph. The exponential size of this graph, though, makes such restrictions costly to test. Hence, we propose an intermediate approach, using a state-variable model for planning and defining restrictions on the separate state-transition graphs for each state variable. We identify such restrictions which can tractably be tested and we present a planning algorithm which is correct and runs in polynomial time under these restrictions. The algorithm has been implemented and it outperforms Graphplan on a number of test instances. In addition, we present an exhaustive map of the complexity results for planning under all combinations of four previously studied syntactical restrictions and our five new structural restrictions. This complexity map considers both the optimal and non-optimal plan generation problem.     

有关行为主义人工智能研究综述

通过与传统人工智能的比较，介绍了基于行为的智能模拟技术的发展及现状，并详细评述了行为主义人工智能的研究方向以及在研究过程中涉及到的前沿技术，最后给出了基于行为主义人工智能构建智能主体系统的设计原则。     

Negotiation Agents that Make Prudent Compromises and are Slightly Flexible in Reaching Consensus

The contribution of this work is designing and developing enhanced market-driven agents with the flexibility to (1) respond to changing market conditions, and (2) raise and relax trade aspirations. Previous theoretical analyses have shown that market-driven agents ( MDA s) make prudent compromises by reacting to changing market situations by taking into account factors such as competition, deadlines, and trading options. This work augments the design of an MDA with three fuzzy decision controllers that guide the agent in (i) relaxing trade aspiration in face of intense negotiation pressure, and (ii) raising trade aspiration in extremely favorable markets. Results from extensive simulations conducted using an implemented testbed suggest that when compared to MDA s, agents in this work achieved (1) higher success rates in reaching deals, (2) higher average utilities, and (3) higher expected utility.     

晶体概念新释

提出了晶体的新概念，修改了晶体中原子排列周期性的传统提法。按照晶体结构中原子是否有周期性重复排列将晶体分成了单胞晶和双胞晶两大类。