User Model Clustering

User model which is the representation of information about user is the heart of adaptive systems. It helps adaptive systems to perform adaptation tasks. There are two kinds of adaptations: 1) Individual adaptation regarding to each user;2) Group adaptation focusing on group of users. To support group adaptation, the basic problem which needs to be solved is how to create user groups. This relates to clustering techniques so as to cluster user models because a group is considered as a cluster of similar user models. In this paper we discuss two clustering algorithms: k-means and k-medoids and also propose dissimilarity measures and similarity measures which are applied into different structures (forms) of user models like vector, overlay, and Bayesian network.

UMIS: A Service for User Model Interoperability

In this paper we describe UMIS, a service architecture that enables user adaptive applications to exchange User Model data on the Web. UMIS provides a set of facilities that allow applications to interoperate with minimum changes in their internal logics and knowledge representation. The goal is to support the process of interoperability in three ways: providing an efficient centralized discovery service;offering a service for simple interaction for the exchange of UM value in a p2p way;and offering a negotiation mechanism to be used in case of communication hurdles (i.e. semantic ambiguities and missing response). We developed a proof-of-concept prototype of UMIS and we tested it with an existing user-adaptive application. According to our test results, our approach improves the communication with respect to standard solutions for interoperability regarding the quality of exchange, with a negligible impact on the communication costs and traffic generation.

Framework to Model User Request Access Patterns in the World Wide Web

In this paper, we present a novel approach to model user request patterns in the World Wide Web. Instead of focusing on the user traffic for web pages, we capture the user interaction at the object level of the web pages. Our framework model consists of three sub-models: one for user file access, one for web pages, and one for storage servers. Web pages are assumed to consist of different types and sizes of objects, which are characterized using several categories: articles, media, and mosaics. The model is implemented with a discrete event simulation and then used to investigate the performance of our system over a variety of parameters in our model. Our performance measure of choice is mean response time and by varying the composition of web pages through our categories, we find that our framework model is able to capture a wide range of conditions that serve as a basis for generating a variety of user request patterns. In addition, we are able to establish a set of parameters that can be used as base cases. One of the goals of this research is for the framework model to be general enough that the parameters can be varied such that it can serve as input for investigating other distributed applications that require the generation of user request access patterns.

The User Interfaces Transition Diagram-Editor: A Tool to Simplify User-System Interaction Modeling

The User Interface Transition Diagram (UITD) is a formal modeling notation that simplifies the specification and design of user-system interactions. It is a valuable communication tool for technical and non-technical stakeholders during the requirements elicitation phase, as it provides a simple yet technically complete notation that is easy to understand. In this paper, we investigated the efficiency of creating UITDs using draw.io, a widely used diagramming software, compared to a dedicated UITD editor. We conducted a study to compare the time required to use each tool to complete the task of creating a medium size UITD, as well as the subjective ease of use and satisfaction of participants with the dedicated Editor. Our results show that the UITD editor is more efficient and preferred by participants, highlighting the importance of using specialized tools for creating formal models such as UITDs. The findings of this study have implications for software developers, designers, and other stakeholders involved in the specification and design of user-system interactions.

Agent Modeling of User Preferences Based on Fuzzy Classified ANNs in Automated Negotiation

In agent-based automated negotiation research area,a key problem is how to make software agent more adaptable to represent user preferences or suggestions,so that agent can take further proposals that reflect user requirements to implement ecommerce activities like automated transactions.The difficulty lies in the uncertainty of user preferences that include uncertain description and contents,non-linear and dynamic variability.In this paper,fuzzy language was used to describe the uncertainty and combine with multiple classified artificial neural networks(ANNs) for self-adaptive learning of user preferences.The refinement learning results of various negotiation contracts' satisfaction degrees in the extent of fuzzy classification can be achieved.Compared to unclassified computation,the experimental results illustrate that the learning ability and effectiveness of agents have been improved.

Research on the User Interest Modeling of Personalized Search Engine

At present, how to enable Search Engine to construct user personal interest model initially, master user＇s personalized information timely and provide personalized services accurately have become the hotspot in the research of Search Engine area. Aiming at the problems of user model＇s construction and combining techniques of manual customization modeling and automatic analytical modeling, a User Interest Model （UIM） is proposed in the paper. On the basis of it, the corresponding establishment and update algorithms of User lnterest Profile （UIP） are presented subsequently. Simulation tests proved that the UIM proposed and corresponding algorithms could enhance the retrieval precision effectively and have superior adaptability.

A mixed stochastic user equilibrium model considering influence of advanced traveller information systems in degradable transport network

Advanced traveler information systems （ATIS） can not only improve drivers＇ accessibility to the more accurate route travel time information, but also can improve drivers＇ adaptability to the stochastic network capacity degradations. In this paper, a mixed stochastic user equilibrium model was proposed to describe the interactive route choice behaviors between ATIS equipped and unequipped drivers on a degradable transport network. In the proposed model the information accessibility of equipped drivers was reflected by lower degree of uncertainty in their stochastic equilibrium flow distributions, and their behavioral adaptability was captured by multiple equilibrium behaviors over the stochastic network state set. The mixed equilibrium model was formulated as a fixed point problem defined in the mixed route flows, and its solution was achieved by executing an iterative algorithm. Numerical experiments were provided to verify the properties of the mixed network equilibrium model and the efficiency of the iterative algorithm.

User growth and penetration modeling for converged heterogeneous network

To evaluate the trail potential of converged heterogeneous network （CHN） market, the logistic method for adoption modeling of CHN is used. User growth ＆ penetration have been taken as two variants to find saturation condition in market. Model is continuous in time but modifications are done for discrete recurrence equation, commonly known as logistic map. Dynamic and static phases are taken into consideration while penetration decay is not covered in this model.

User’s Relevance of PIR System Based on Cloud Models

A new method to evaluate fuzzily user＇s relevance on the basis of cloud models has been proposed. All factors of personalized information retrieval system are taken into account in this method. So using this method for personalized information retrieval （PIR） system can efficiently judge multi-value relevance, such as quite relevant, comparatively relevant, commonly relevant, basically relevant and completely non-relevant, and realize a kind of transform of qualitative concepts and quantity and improve accuracy of relevance judgements in PIR system. Experimental data showed that the method is practical and valid. Evaluation results are more accurate and approach to the fact better.

Learning Hierarchical User Interest Models from Web Pages

We propose an algorithm for learning hierarchical user interest models according to the Web pages users have browsed. In this algorithm, the interests of a user are represented into a tree which is called a user interest tree, the content and the structure of which can change simultaneously to adapt to the changes in a user＇s interests. This expression represents a user＇s specific and general interests as a continuurn. In some sense, specific interests correspond to shortterm interests, while general interests correspond to longterm interests. So this representation more really reflects the users＇ interests. The algorithm can automatically model a us er＇s multiple interest domains, dynamically generate the in terest models and prune a user interest tree when the number of the nodes in it exceeds given value. Finally, we show the experiment results in a Chinese Web Site.

A Joint Model of Device Load and User Intention in Load Monitoring

In this paper, a concept for the joint modeling of the device load and user intention is presented. It consists of two coupled models, a device load model to characterize the power consumption of an electric device of interest, and a user intention model for describing the user intentions which cause the energy consumption. The advantage of this joint model is the ability to predict the device load from the user intention and to reconstruct the user intention from the measured device load. This opens a new way for load monitoring, simulation and prediction from the perspective of users instead of devices.

The Impact of User and Traffic Models on the Design of the Communications Network in the Smart Grid

A critical component of the smart grid (SG) infrastructure is the embedded communications network, where an important objective of the latter is the expansion of its throughput, in conjunction with the satisfaction of specified latency and accuracy requirements. For the effective design of the communications network, the user and traffic profiles, such as known-user vs. unknown-user populations and bursty vs. non-bursty data traffics, must be carefully considered and subsequently modeled. This paper relates user and traffic models to the deployment of effective multiple access transmission algorithms in the communications network of the SG.

Blog acceptance model: An empirical study on exploring users' acceptance and continual usage of blogs

Blogs have permeated into our daily lives at a fast speed, and various kinds of blog spaces have attracted our attention. However, little effort has been made on studying the users' motivation to participate in blog activities. This paper aims to construct a theoretical model about the blog adoption based on technology acceptance model(TAM theory), social capital theory and social exchange theory, and put forward 18 related hypotheses. Then the survey method is adopted to analyze the data from 208 questionnaires using the SPSS and LISREL tools, and to examine the theoretical model and hypotheses. Finally, the paper makes a discussion from five aspects due to the results of data analysis, including individual driving factors, group driving factors, community driving factors, technology acceptance factors and moderating variables. The results show that curiosity/enjoyment, user's experience, social interaction and social identification will greatly affect users' motivation to accept a blog; meanwhile, perceived ease of use, exchange cost and trust will partially influence users' intention to participate in blog activities. The results also suggest that age and education degrees have significant moderating effects on users' acceptance and updating of blogs.

User satisfaction-based quality evaluation model and survey analysis of network information service

On the basis of user satisfaction,authors made research hypotheses by learning from relevant e-service quality evaluation models.A questionnaire survey was then conducted on some content-based websites in terms of their convenience,information quality,personalization and site aesthetics,which may affect the overall satisfaction of users.Statistical analysis was also made to build a user satisfaction-based quality evaluation system of network information service.

基于用户心智模型强化与再构的界面设计流程研究

为了进一步探索心智模型理论,将其作为工具应用到界面设计中,试图探索出一种在用户心智模型引导下的界面设计流程。以心智模型理论为基础,探讨了用户心智模型强化的设计程序与方法、用户心智模型再构的设计程序与方法,并且论述了在界面设计中如何运用用户心智模型强化与再构提升产品界面可用性。总结出基于用户心智模型强化与再构的界面设计流程。通过对3个方面的研究,总结出一种基于用户心智模型强化与再构的界面设计流程,为提升界面信息呈现与用户心智的匹配提供新的设计思路,为产品界面设计提供了新的理论支持。

元宇宙场域下的公共图书馆用户空间服务需求

元宇宙相关技术的应用与发展是推进图书馆服务变革与优化的重要机遇,为多元空间建设提供方向,对公共图书馆空间服务创新具有指导意义。文章对不同年龄、学历、专业以及地域的公共图书馆用户进行深度访谈,通过扎根理论研究挖掘用户对公共图书馆的空间服务需求,结合KANO模型构建元宇宙场域下公共图书馆用户空间服务需求模型,进而提出发展策略。结果表明:图书馆管理是用户空间服务需求的外部驱动因素,用户体验与空间配置是用户空间服务需求的内部驱动因素。公共图书馆应以智能化为目标、以多元治理为手段、以技术为依托,从图书馆建设、用户需求以及空间配置三个方面提升空间服务能力。

用户需求视角下医疗健康类APP适老化改造内容优先序研究

[目的/意义]了解用户对医疗健康类APP适老化改造的需求,探析改造内容的优先序,从用户需求视角优化功能设计,为医疗健康类APP适老化的改造提供参考。[方法/过程]在系统梳理相关文献的基础上,运用专家调研法、访谈法等方式提炼26项需求属性,并综合运用Kano模型、混合类分析以及Better-Worse系数分析对归纳的26项需求进行分类,识别各项需求属性的所属类型。[结果/结论]医疗健康类APP适老化改造的用户需求层次分明,分为8项必备型、7项期望型、4项魅力型和7项无差异型,并对此从保障必备型供给、提升期望型质量、扩大魅力型供给和调整无差异型内容4个方面有针对性地提出了对策建议,有效对接用户需求,分层次、有重点地进行医疗健康类APP适老化改造,帮助老年群体更好地融入现代社会。

公共图书馆文旅融合服务需求研究

用户对服务方式和服务体验的需求关系到用户对公共图书馆文旅融合服务的忠诚度和满意度。构建了公共图书馆文旅融合方式需求和服务体验需求的影响因素指标。采用问卷调查的方式,利用Kano模型等方法,就用户对公共图书馆文旅融合方式需求和服务体验需求的属性和优先级进行界定。并提出公共图书馆应首先满足基本需求,重点满足期望需求,尽量满足魅力需求,动态监测无差异需求,并注重文旅融合方式与文旅服务体验需求的有机结合等供给策略。

多平台视角下用户知识交流主题挖掘与画像分析——以ChatGPT话题为例

[目的/意义]基于多平台视角挖掘用户知识交流主题特征,构建用户画像标签体系,有助于全面理解用户利用差异化平台开展知识交流行为的规律偏好,为平台提供精确优化策略,为平台间生态建设提供参考依据。[方法/过程]采集大众社交平台、兴趣交流平台、垂直知识平台3类典型平台中ChatGPT话题相关的原创博文及用户数据,采用BERTopic模型凝练知识交流主题,结合多平台数据特点,从自然属性、社会属性、知识交流行为属性和知识交流主题属性4个维度抽出画像标签,通过K-means聚类实现用户画像,呈现群组特征并进行平台差异对比。[结果/结论]研究识别出了应用场景、行业进展、未来探讨、相关产业、咨询求助、热门话题、使用感受、风险监督8大知识交流方向及46个主题;根据属性特征将用户划分为专业贡献型、综合共享型、社交求知型和话题潜力型4类,平台间知识交流主题和用户画像存在显著差异,各平台应采取差异化的激励方式,增强平台用户黏性。