Jack C. P. Cheng

Jack C. P. Cheng
The Hong Kong University of Science and Technology | UST · Department of Civil and Environmental Engineering

BEng, MPhil, PhD

About

245
Publications
147,284
Reads
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7,694
Citations
Citations since 2016
176 Research Items
7327 Citations
201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
Additional affiliations
January 2016 - present
The Hong Kong University of Science and Technology
Position
  • Professor (Associate)
January 2010 - present
Stanford University
January 2010 - June 2016
The Hong Kong University of Science and Technology
Position
  • Professor (Assistant)

Publications

Publications (245)
Article
Structural design optimization for steel reinforcement (rebar) is a critical part of reinforced concrete structures. In practice, this process is conducted manually or semi-automatically for each element, which is time-consuming and relies on engineers' knowhow and experience for buildability improvement, material savings and clash resolution. This...
Article
Full-text available
Blockchain technology has gained increasing attention in the construction sector. The process of developing a blockchain-based application that fits user requirements largely depends on the selection of a suitable consensus protocol, which acts as the centerpiece of blockchain architecture. In distributed networks, consensus protocols not only help...
Article
Full-text available
Building information models (BIMs) have been widely adopted in current construction projects to enhance the efficiency of facility maintenance operations. As-built BIMs can reflect the actual conditions of facilities and thus as-built BIM reconstruction has shown great significance in digital twin generation, building health monitoring, facility ma...
Article
The Unmanned Aerial Vehicle (UAV) equipped with a Light Detection and Ranging (LiDAR) scanner provides a versatile and efficient platform for mobile laser scanning in construction-related scenarios. Recent studies on UAVs have demonstrated point-to-point navigation, yet there has been sparse investigation on scan coverage planning to fully explore...
Article
Crowd prediction is a crucial aspect of modern society, facilitating numerous decision-making processes, such as hazard detection and facility maintenance. Conventional crowd prediction relies on rule-based models which involve tedious formation steps and are error-prone. Hence, this study adopts spatiotemporal deep learning models for crowd predic...
Article
Full-text available
Model auditing is a critical step before conducting Building Information Modeling (BIM)-based Quantity Take-off (QTO) because these models may contain various human errors and mistakes, leading to insufficient semantic information and inconsistent modeling style in BIM models. The traditional object-oriented approach has difficulties in representin...
Article
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HVAC systems provide satisfactory indoor environments, but they usually consume large amounts of energy in order to achieve an acceptable thermal comfort level and indoor air quality (IAQ). Balancing thermal comfort, IAQ, and energy consumption is thus a challenging task. However, the main problem faced in such research is that it is inefficient to...
Article
Wireless sensor networks (WSN) offer an automated, convenient, and low-cost option for building IoT networks for monitoring the structural health of complex infrastructures. The limited bandwidth of a typical WSN is not favorable for intensive data transfer. Therefore, utilizing edge computing that allows raw data to be processed and compressed at...
Article
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This paper proposes a global path planning (GPP) system based on building information modeling (BIM) and physics engine for unmanned ground vehicles (UGVs) operations in indoor environments. Firstly, UGV configuration is integrated into BIM as a knowledge base of GPP system by customized IFC structure, with which a multi-layer map generation method...
Article
Purpose As an emerging visualization technology, virtual reality (VR) falls into the dilemma of having great potential but a low adoption degree in the architectural, engineering and construction (AEC) industry. However, few studies paid attention to studying barriers affecting VR’s adoption and their inner mechanisms. This makes AEC users hard to...
Article
Monitoring unsafe operations of construction machines is important for reducing accidents on sites. To automate safety monitoring, this paper studies pose estimation of construction machines, which describes their motions in 3D space. Inertial Measurement Unit (IMU) is considered accurate, cost-saving and user-friendly for estimating the pose of ma...
Conference Paper
Building information modeling (BIM) has offered substantial improvements in planning and scheduling in the construction industry. However, it is still time consuming to plan and coordinate between team members the detailed requirements and information for the generation of practical installation schedules. During the installation stage, there can b...
Article
Full-text available
Piping components constitute a crucial part of commercial buildings and industrial plants, and 3D modeling of such components from LiDAR point clouds has attracted wide attention. One of the essential challenges of 3D modeling from point clouds is in classifying object shapes. Unfortunately, accurate and robust classification of complex piping comp...
Article
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Sewer pipes are essential infrastructure for discharging wastewater. Regular pipe inspection is necessary to prevent malfunction of sewer systems, for which closed-circuit television (CCTV) crawlers are commonly used to capture images of the pipe interior. As manual assessment of pipe condition is labor-intensive and time-consuming, automated defec...
Article
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Real-time identification and prevention of safety risks in dynamic construction activities are demanded by construction safety managers to cope with the growing complexity of the construction site. Most of the studies on BIM-based construction safety inspection and prevention use data from the planning and design stage. Meanwhile, safety managers s...
Article
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Building Information Modeling (BIM) is widely adopted for design collaboration in the architecture, engineering, and construction (AEC) industry, while its centralized paradigm suffers the risk of data manipulation. To this end, blockchain is an emerging distributive technology that guarantees data authenticity and integrity by providing decentrali...
Article
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Underground heritage sites generally experience significant humidity, which results in the destruction of the surfaces and structures. This study establishes an underground heritage site preservation mechanism through a dynamic ventilation system based on digital twin technology. The aim is to control the relative humidity (RH) gradually on the air...
Article
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The lack of integration between the digital and physical world results in a lower level of efficiency and collaboration in the construction industry. Digital twin technology, which creates a visual and digital model of a corresponding physical object for simulating, monitoring, analyzing, and other actions throughout the whole life cycle, is consid...
Article
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When studying Indoor Air Quality (IAQ) in commercial buildings by conducting Computational fluid dynamics (CFD) simulations, the solution domain usually includes studied rooms or floor volumes only. The air shafts connected to the studied room and floor were rarely considered. Previous studies, which focused on analysis and simulation of air moveme...
Article
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Thermal comfort and indoor air quality (IAQ) are important to occupants’ wellbeing. Sensors are deployed for pollutant exposure assessments and long-term IAQ monitoring. How to optimize sensor placements in single rooms has been studied. However, limited studies on sensor placement in a multi-zone indoor environment have been conducted. On a typica...
Article
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Knowledge graph (KG) is an effective tool for knowledge management, particularly in the architecture, engineering and construction (AEC) industry, where knowledge is fragmented and complicated. However, research on KG updates in the industry is scarce, with most current research focusing on text-based KG updates. Considering the superiority of visu...
Article
The establishment of smart construction sites employing smart technologies for real-time interconnection, communication, and interaction has emerged as an interesting topic for researchers and practitioners in the architecture, engineering, and construction industry as they contribute to effective, efficient, and high-quality on-site management. Ho...
Article
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Mechanical, electrical and plumbing (MEP) system provides various services and creates comfortable environments to residents in cities. To enhance the management efficiency of the highly complex MEP system, as-built building information modeling (BIM) is increasingly adopted in the world. Currently, as-built BIMs are mostly drawn manually by modele...
Article
Full-text available
The results of quantity take-off (QTO) based on building information modeling (BIM) technology rely heavily on the geometry and semantics of 3D objects that may vary among BIM model creation methods. Furthermore, conventional BIM models do not contain all the required information for automatic QTO and the results do not follow the descriptive rules...
Article
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Document management systems in AEC projects manage important project documents such as schedules, RFIs, and change orders. Hence, security concerns in document management systems especially involving data integrity of documents and records may have a severe effect on a project in terms of money and the reputations of project participants. Therefore...
Article
Detailed planning, sequencing, and scheduling for the installation of multiple pipe systems are greatly needed to efficiently complete a piping project with both reduced cost and duration. Conventional manual scheduling tools cannot produce optimized and robust installation schedules due to insufficient planning of the installation sequence in gene...
Article
Full-text available
Existing platforms for collaborative BIM design have a centralized system architecture, which suffers cybersecurity risks of design data manipulation and denial of access, leading to a loss of data traceability, a decline in design productivity, and project delays. Blockchain is a promising technology to solve such risks by providing decentralized...
Article
Currently, as-built building information modeling (BIM) models from point clouds show great potential in managing building information. The automatic creation of as-built BIM models from point clouds is important yet challenging due to the inefficiency of semantic segmentation. To overcome this challenge, this paper proposes a novel deep learning-b...
Article
Steel reinforcement (also referred to as rebar) design plays an important role in reinforced concrete (RC) structures in terms of strength requirements, cost and buildability. Currently, rebar design is performed at the individual member level with few considerations of the interference between different intersecting members, leading to potential c...
Article
Understanding pedestrian flow patterns in urban areas could support the decision-making for infrastructure planning. By incorporating computer vision techniques into surveillance video processing, human walking trajectories in a wide area could be identified by pedestrian re-identification (ReID) across multiple cameras. Recent ReID methods mostly...
Article
Analyzing the walking behavior of the public is vital for revealing the need for infrastructure design in a local neighborhood, supporting human-centric urban area development. Traditional walking behavior analysis practices relying on manual on-street surveys to collect pedestrian flow data are labor-intensive and tedious. On the contrary, automat...
Preprint
Full-text available
Virtual Reality (VR) has been increasingly applied in construction teaching. To evaluate the effect of VR in construction teaching, this paper develops a VR teaching case based on the knowledge of coiled waterproof roofs and discusses the prospect of VR technology in construction teaching through comparative study. Short-term and long-term (2 days)...
Article
Steel reinforcement design in practices is performed at individual member level with little considerations of member-member intersections, which results in reinforcement overlaps and congestion. This paper presents a new approach based on building information modeling (BIM) and two-stage genetic algorithms (GA) to automatically optimize the clash-f...
Article
Full-text available
As-built building information modeling (BIM) has gained much attention in mechanical, electrical and plumbing (MEP) systems for better facility management. To create as-built BIMs, laser scanning technology is widely used to collect raw data due to its high measurement speed and accuracy. Currently, as-built models are mostly drawn by experienced p...
Article
Full-text available
Due to the decentralisation and complexity of knowledge in the architecture, engineering and construction (AEC) industry, the research on knowledge graphs (KGs) is still insufficient, and most of the research focuses on text-based KG structuring or updating. Entity extraction, a sub-task of knowledge extraction, is critical in general KG update app...
Article
Processing steel reinforcement is an on-site activity that includes cutting and bending, which are time-consuming and uneconomical. When moving toward the construction automation, off-site prefabrication is important with the aid of Building Information Modeling (BIM) and Industry Foundation Classes (IFC) which are utilized as a collaborative appro...
Article
Full-text available
Natural ventilation is particularly important for residential high-rise buildings as it maintains indoor human comfort without incurring the energy demands that air conditioning does. To improve a building's natural ventilation, it is essential to develop models to understand the relationship between wind flow characteristics and the building's des...
Article
Many modern commercial buildings involve complex shaped façades, resulting in increasing complexity as well as challenges in façade manufacturing and assembly processes. Currently, the keys to manufacture façade panels are fabrication drawings. However, generating fabrication drawings for façade panels using conventional approaches is time-consumin...
Article
There is a growing trend of using computer vision techniques for interpreting Closed-Circuit Television (CCTV) inspection videos of sewer pipes. Previous studies mainly focus on detecting defect types and locations in CCTV images, yet limited systematic approaches are available for automatically evaluating defect severity and sewer condition with r...
Article
Full-text available
Security of information in collaborative BIM platforms is crucial particularly for critical projects such as that of government buildings, prisons, and power plants. Inappropriate distribution and loss of sensitive information may potentially lead to physical security threats, financial loss, and loss of trust and reputation. Therefore, this paper...
Article
Platform decommissioning decision making is a major issue as many of the existing offshore oil and gas platforms (OOGPs) require to be decommissioned. The cost and environmental impact are two main criteria for OOGP decommissioning. This paper reviews OOGP decommissioning factors and the current estimation methodologies of decommissioning cost and...
Chapter
Full-text available
Construction Document Management Systems (CDMS) track, manage, and store a variety of documents such as 3D model files, schedules, specifications, and images that are large in size and have different ownerships. The primary objectives of CDMSs are to facilitate document approval workflows, document version management, and security properties such a...
Chapter
Understanding pedestrian behaviors such as their movement patterns in urban areas could contribute to the design of pedestrian-friendly facilities. With the commonly deployed surveillance cameras, pedestrian movement in a wide region could be identified by the person re-identification (ReID) technique across multiple cameras. Convolutional neural n...
Chapter
The layout design and spatial coordination of multiple pipe systems is major challenge in the construction industry. The purpose of multiple pipe layout design is to find out an optimal layout for numerous individual pipes to route from a different start locations to different end locations in a 3D environment with no clashes under various kinds of...
Chapter
Full-text available
Construction sites suffer from higher hazard rates compared to other occupational workplaces, which can be attributed to dynamic activities of construction equipment. Hence, it is important to track locations, poses, and movements of construction equipment for on-site safety monitoring. With the wide installations of surveillance cameras, previous...
Chapter
Energy efficiency is an important aspect in building design nowadays. During the design phase, energy simulation and analysis can enhance the overall building energy efficiency at a lower cost and less delay to the project schedule. Currently, energy analysis is performed digitally in energy simulation software applications which require users to d...
Chapter
Posture estimation provides basic mechanical information for remote control of construction equipment, safety analysis of construction sites and productivity analysis of construction projects. The rapid development of micro-machined electromechanical systems (MEMS) inertial sensors enables wide application of posture estimation in the construction...
Article
Computer vision techniques are widely studied for automating the interpretation of sewer pipe inspection videos, yet previous studies mainly focus on defect detection and segmentation of individual images, which cannot identify if the defect is the same one across consecutive video frames (i.e. track the defect). Nevertheless, the number of unique...
Article
The variation of construction machine poses is one of the main causes for interactive on-site safety issues such as struck-by hazards. With the aim to reduce such hazards, we propose a framework for predicting construction machine poses based on historical motion data and activity attributes. After building a machine motion dataset, we develop a ke...
Conference Paper
Information interoperability among different systems is essential to support knowledge sharing in the architecture, engineering, construction, and facilities management (AEC/FM) industry. Currently, technologies such as building information modelling (BIM) and internet of things (IoT) are increasingly being applied to improve facility maintenance m...
Article
Full-text available
Computational fluid dynamics (CFD) is a powerful tool for performing indoor airflow analysis. The simulation results are usually validated with measurement results for accuracy in reflecting reality. When conducting CFD for simulating air flow in a multiple-zone indoor environment with different boundary conditions in different regions, the validat...
Conference Paper
Full-text available
An Unmanned Aerial Vehicle (UAV), equipped with a Light Detection And Ranging (LiDAR) scanner, can collect high-accuracy point cloud data of facilities in cluttered indoor environment. Recent developments in aerial robotics have demonstrated navigation through designated waypoints, yet little has been investigated on the trajectory to complete a fu...
Article
Indoor positioning complements the mature outdoor positioning technology, Global Navigation Satellite System (GNSS), by achieving real-time positioning in any environment under a blockage of GNSS signals. In the construction management field, this paper demonstrates that indoor positioning enables five significant applications that considerably enh...
Article
Full-text available
Interim payment provisions in construction projects are susceptible to unfair practices. In construction project participants with varying financial capacities belonging to different organizations are bound by contractual relationships. Due to this type of project organizational structure, project participants do not completely trust each other whi...
Article
To better support the prevention of air pollutions for sustainable cities, researchers have studied different methods to forecast air pollutant concentrations. Existing methods have gone through the development from deterministic methods, statistical methods, to machine learning and deep learning methods. The latest direction lies in Long Short-Ter...
Article
Due to the rising concern about air quality, air pollution prediction and control has been a hot research domain for scholars in recent years. Many studies have been conducted to predict and control air pollution using different kinds of methods. However, these studies did not explore the air quality interactions between areas and areas. They canno...
Article
Evacuation navigation in emergencies such as fires is one of the most important operational considerations for a building. The large and complicated interior spaces, as well as the intensive population significantly increase the difficulty of fire evacuation in large-scale buildings. The environmental changes such as the spread of a fire and the fl...
Article
The increasing global importance of climate change has been clearly recognised in the last few years. The building industry contributed to a large proportion of the global energy use and carbon emissions across material production, construction, operation and end-of-life. Utilizing computer simulation and optimisation to minimize the building life...
Article
Land value plays a vital role in the real estate market. It is a critical reference for urban planners to reallocate land resources and introduce valid policies. Studying the influential factors on land value can help better understand the spatial-temporal variation of land values and design effective control policies. This attracted a number of sc...
Article
Augmented reality (AR), which requires a spatial registration technique, has proved to greatly improve the efficiency of facility maintenance management (FMM) activities. Being one of the most promising techniques for indoor localization, Wi-Fi fingerprinting has been widely used for AR spatial registration. However, localization accuracy of Wi-Fi...
Article
Full-text available
As-built building information models (BIMs) are increasingly needed for construction project handover and facility management. To create as-built BIMs, laser scanning technology has gained popularity in the recent decades due to its high measurement accuracy and high measurement speed. However, most existing methods for creating as-built BIMs from...
Article
Wildfires, also known as bushfires, happened more and more frequently in the last decades. Especially in countries like Australia, the dry and warm climate there make bushfire become one of the most frequent local hazards. Among different kinds of causes of bushfires, overhead powerline vegetation fault is one of the most common causes that relate...
Article
Air pollution has become one of the world’s largest health and environmental problems. Studies focusing on air quality prediction, influential factors analysis, and control policy evaluation are increasing. When conducting these studies, valid and high-quality air pollution data are necessarily required to generate reasonable results. Missing data,...
Article
Improving the energy efficiency of the buildings is a worldwide hot topic nowadays. To assist comprehensive analysis and smart management, high-quality historical data records of the energy consumption is one of the key bases. However, the energy data records in the real world always contain different kinds of problems. The most common problem is m...
Article
Facility managers usually conduct reactive maintenance or preventive maintenance strategies in building maintenance management. However, there are some limitations that reactive maintenance cannot prevent failure, and preventive maintenance cannot predict the future condition of MEP components and repair in advance to extend the lifetime of facilit...