Publications by Jiyong Zhang | EPFL Graph Search

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Disagreement and fragmentation in growing groups

Jiyong Zhang, Yubo Xie

The arise of disagreement is an emergent phenomenon that can be observed within a growing social group and, beyond a certain threshold, can lead to group fragmentation. To better understand how disagreement emerges, we introduce an analytically tractable m ...

PERGAMON-ELSEVIER SCIENCE LTD2023

New Multi-Keyword Ciphertext Search Method for Sensor Network Cloud Platforms

Jiyong Zhang, Yue Wang, Hongyu Yang

This paper proposed a multi-keyword ciphertext search, based on an improved-quality hierarchical clustering (MCS-IQHC) method. MCS-IQHC is a novel technique, which is tailored to work with encrypted data. It has improved search accuracy and can self-adapt ...

MDPI2018

Predictors of Life Satisfaction based on Daily Activities from Mobile Sensor Data

Pearl Pu Faltings, Jiyong Zhang, Onur Yürüten

In recent years much research work has been dedicated to detecting user activity patterns from sensor data such as location, movement and proximity. However, how daily activities are correlated to people's happiness (such as their satisfaction from work an ...

2014

A Visual Interface for Critiquing-based Recommender Systems

Pearl Pu Faltings, Jiyong Zhang, Nicolas Jones

Critiquing-based recommender systems provide an efficient way for users to navigate through complex product spaces even if they are not familiar with the domain details in e-commerce environments. While recent research has mainly concentrated on methods fo ...

Acm Order Department, P O Box 64145, Baltimore, Md 21264 Usa2008

Evaluating compound critiquing recommenders: A real-user study

Pearl Pu Faltings, Jiyong Zhang

Conversational recommender systems are designed to help users to more efficiently navigate complex product spaces by alternatively making recommendations and inviting users' feedback. Compound critiquing techniques provide an efficient way for users to fee ...

Association for Computing Machinery, New York, NY 10036-5701, United States2007

Refining preference-based search results through Bayesian filtering

Pearl Pu Faltings, Jiyong Zhang

Preference-based search (PBS) is a popular approach for helping consumers find their desired items from online catalogs. Currently most PBS tools generate search results by a certain set of criteria based on preferences elicited from the current user durin ...

Association for Computing Machinery, New York, NY 10036-5701, United States2007

A comparison of two compound critiquing systems

Pearl Pu Faltings, Jiyong Zhang

Compound critiques allow users to simultaneously express directional preferences over several product attributes. Presenting the user with compound critiques is not a new idea. The original Find-Me Systems (e.g., Car Navigator) showed static compound criti ...

Association for Computing Machinery, New York, NY 10036-5701, United States2007

A comparative study of compound critique generation in conversational recommender systems

Pearl Pu Faltings, Jiyong Zhang

Critiquing techniques provide an easy way for users to feedback their preferences over one or several attributes of the products in a conversational recommender system. While unit critiques only allow users to critique one attribute of the products each ti ...

Springer Verlag, Heidelberg, D-69121, Germany2006

Effort and accuracy analysis of choice strategies for electronic product catalogs

Pearl Pu Faltings, Jiyong Zhang

One crucial task for e-commerce systems is to help buyers find products that not only satisfy their preferences but also reduce their search effort. Usually the amount of available products is far beyond the upper limit that any individual could process by ...

Association for Computing Machinery, New York, NY 10036-5701, United States2005

Jiyong Zhang

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Disagreement and fragmentation in growing groups

New Multi-Keyword Ciphertext Search Method for Sensor Network Cloud Platforms

Predictors of Life Satisfaction based on Daily Activities from Mobile Sensor Data

Design and evaluation issues for user-centric online product search

A Visual Interface for Critiquing-based Recommender Systems

Evaluating compound critiquing recommenders: A real-user study

Refining preference-based search results through Bayesian filtering

A comparison of two compound critiquing systems

A comparative study of compound critique generation in conversational recommender systems

Effort and accuracy analysis of choice strategies for electronic product catalogs

Disagreement and fragmentation in growing groups

Predictors of Life Satisfaction based on Daily Activities from Mobile Sensor Data

Design and evaluation issues for user-centric online product search

A comparison of two compound critiquing systems

A comparative study of compound critique generation in conversational recommender systems

New Multi-Keyword Ciphertext Search Method for Sensor Network Cloud Platforms

A Visual Interface for Critiquing-based Recommender Systems

Refining preference-based search results through Bayesian filtering

Evaluating compound critiquing recommenders: A real-user study

Effort and accuracy analysis of choice strategies for electronic product catalogs