Browsing NTNU Open by Author "Liu, Peng"
Now showing items 21-34 of 34
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Measurement and analysis of a membrane energy exchanger for energy efficient ventilation
Lecomte-Saur, Seylamouni (Master thesis, 2020)Energy recovery is an essential energy-saving measure for buildings with mechanical ventilation. In cold climate, a common issue with the widely used flat-plate heat exchanger is the condensation of moisture in exhaust air ... -
A multi-objective optimisation framework to design membrane-based energy recovery ventilation for low carbon buildings
Liu, Peng; Mathisen, Hans Martin; Justo Alonso, Maria; Halfvardsson, Anneli (Peer reviewed; Journal article, 2023)Membrane energy exchangers (MEEs) are increasingly being studied and utilized to contribute to realising energy-efficient building services and providing satisfactory indoor environments. The performance of MEEs has been ... -
Multi-Turn Generation-Based Conversational Agents in Open Domains
Xing, Yujie (Doctoral theses at NTNU;2024:75, Doctoral thesis, 2024)This PhD thesis focuses on open-domain generation-based conversational agents, which are chatbots that generate responses to any input or question using natural language processing and deep learning techniques. The thesis ... -
Multilingual Review-aware Deep Recommender System via Aspect-based Sentiment Analysis
Liu, Peng; Zhang, Lemei; Gulla, Jon Atle (Peer reviewed; Journal article, 2021)With the dramatic expansion of international markets, consumers write reviews in different languages, which poses a new challenge for Recommender Systems (RSs) dealing with this increasing amount of multilingual information. ... -
Performance of Membrane Energy Exchangers in Ventilation: Analyses of Odour Transfer, VOC Transfer, and Sensible and Latent Effectiveness
Tærum, Mathea Lie (Master thesis, 2023)For å forsikre energieffektiv drift av bygninger og redusere utslipp fra driftsfasen anbefales bruk av varmegjenvinning i ventilasjonssystemer. Membran energivekslere tilbyr innovativ teknologi til ventilasjonssystemer i ... -
Real-time social recommendation based on graph embedding and temporal context
Liu, Peng; Zhang, Lemei; Gulla, Jon Atle (Journal article; Peer reviewed, 2018)With the rapid proliferation of online social networks, personalized social recommendation has become an important means to help people discover their potential friends or interested items in real-time. However, the ... -
Recommending on graphs: a comprehensive review from a data perspective
Zhang, Lemei; Liu, Peng; Gulla, Jon Atle (Peer reviewed; Journal article, 2023)Recent advances in graph-based learning approaches have demonstrated their effectiveness in modelling users’ preferences and items’ characteristics for Recommender Systems (RSs). Most of the data in RSs can be organized ... -
A review of heat recovery technologies and their frost control for residential building ventilation in cold climate regions
Bai, Hongyu; Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)This study reviewed heat recovery technologies and their application in residential buildings in cold climates. The increasing efforts on reducing building energy use over the recent years have resulted in improved insulated ... -
Semantic User Behaviour Prediction in Online News - Applying Topic Modeling, Community Detection, and User Modeling for News Recommendation
Kjekstad, Nina; Reknes, Elida Karina (Master thesis, 2018)In recent years, predicting user behaviour has become increasingly important within the news recommendation area. Knowledge of behavioural patterns offers valuable insight for developing efficient and user friendly services, ... -
Techniques for airflow measurements to determine the real efficiency of heat recovery in ventilation systems
Rønneseth, Øystein; Liu, Peng; Alonso, Maria Justo; Mathisen, Hans Martin (Journal article; Peer reviewed, 2019)Heat recovery in ventilation is essential to reduce energy use and thus mitigate greenhouse gas emissions from the building sector. Heat recovery efficiency of at least 80 % in new buildings is required according to Norwegian ... -
Theoretical Prediction of Longitudinal Heat Conduction Effects on the Efficiency of the Heat Wheel Used for Ventilation in Powerhouse Building “Kjørbo” in Norway
Liu, Peng; Mathisen, Hans Martin; Alonso, Maria Justo (Journal article; Peer reviewed, 2017)The present study investigates effects of longitudinal heat conduction (LHC) on the heat recovery effectiveness of the heat wheel in the Powerhouse building “Kjørbo”. The effects LHC which are usually ignored in the heat ... -
Understanding the role of moisture recovery in indoor humidity: An analytical study for a Norwegian single-family house during heating season
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin; Halfvardsson, Anneli; Simonson, Carey J. (Journal article; Peer reviewed, 2022) -
The use of machine learning to determine moisture recovery in a heat wheel and its impact on indoor moisture
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin; Halfvardsson, Anneli (Peer reviewed; Journal article, 2022)Balanced mechanical ventilation equipped with heat recovery has been widely adopted in cold climates to ensure an acceptable indoor environment in energy-efficient buildings. An acknowledged trend to achieve more energy ... -
Use of Membrane Energy Exchanger in Ventilation: Odour Sensory Measurement
Liu, Peng; Mathisen, Hans Martin; Skaten, Mariell; Justo Alonso, Maria (Peer reviewed; Journal article, 2022)Membrane energy exchanger (MEE) for a new generation of energy efficient heating, ventilation and air conditioning (HVAC) systems has attracted wide attention. As MEE has been increasingly employed, extensive studies of ...