2023-11-02

"Research on Assessment of Smart Maturity for Construction Stage of Construction Industry" has been published in the "Construction Technology" on CNKI.

The application of a large amount of information technology has prompted the construction industry, especially in the construction stage, to enter a period of smart development. However, the prerequisite for enterprises within the industry to achieve high-speed smart development is to clarify their own current smart maturity. The study established a framework of smart maturity assessment systems for various segments in the construction stage, detailing the components and operational process of five steps, including selecting maturity assessment methods, developing assessment indicators, presenting assessment results, verifying the assessment system, and discussing strategies for improving smart maturity. Using this as the master template, a smart maturity assessment system for construction management has been constructed and the feasibility, accuracy, and specific usage methods of the smart maturity assessment system framework have been further demonstrated through case analysis. In summary, the above framework can help accurately assess the smart maturity of each segment in the construction stage, and formulate feasible smart development plans, providing fundamental support for the smart development of each segment in the construction stage and the overall construction industry.

Note: The first author of this paper is Wang Miao, senior engineer of China Road & Bridge Corporation. I am the corresponding author. The authors also include Lin Chao, master's student, and Guo Wenjun, Beijing Yunjiaxin Technology Co., LTD. The research results were supported by the National Key Research and Development Program of China and Guangdong Basic and Applied Basic Research Foundation.

2023-10-31

"Ontology-based modeling and application of highway engineering safety knowledge" has been published in the Journal of Tsinghua University(Science and Technology) on CNKI.

In view of the common knowledge gap in engineering salety management, this paperaims to propose an ontology-based framework to achieve domain knowledge modeling and updating. Using the highway engineering field as an example, this paper demonstrates how safety knowledge can be automatically extracted from industry-standard text data to facilitate the construction of a domain KG. Subsequently, the safety management scenarios are developed based on the building information model (BIM), and the auxiliary role of intelligent knowledge in safety management is demonstrated to verily the effectiveness of the engineering application of the developed KG. This paper used the ontology-guided domaln knowledge extraction method to construct the domain KG and proposed a knowledg network-guided method to update the ontology. Specifically, a layered knowledge system with multiple dimensions was summarized as the ontology layer based on the management approach and the established standard specifications withinhighway engineering, Following the guidance of the ontology layer, a structured knowledge network acting as the data layer was extracted from massive text materials by developing a series of knowledge extraction procedures, Consequently, a knowledge-flowing method from the data layer to the ontology layer was proposed. Three categories of methods based on the essence and composition of entities and the clustering of the entity's core words were summarized to realize the automation updating of the ontology layer.Finally, combined with the developed highway safety information retrieval and application system , this paper demonstrated the organization and application of the constructed domain KG, thus verifying the effect of introducing ontology in the organization and deployment of knowledge. The developed ontology of highway engineering salety knowledge was featured as a layered knowledge system with seven levels and 390 nodes connected with ~ 300 000 valid entity nodes in the data layer, facilitating the creation and integration of the KG's logical structures. The proposed method for updating the domain ontology aided by over 1000 technical terms was demonstrated to be effective, with an increment of 51.5% in the expansion of the nodes to the ontology. The designed method of linking the ontology-guided domain KG with the BIM was validated for its feasibility through practical implementation within a real highway engineering salety management system, displaying the positive impact of ontology's guidance in the organization and expansion of knowledge. This paper concentrates on the domain of highway engineering safety and presents a comprehensive paradigm for constructing, updating, and applying a domain KG to demonstrate methodological innovation in ontology updating. The results extend the application scope and technical approaches of KG technology, thereby enhancing information technology level in engineering safety management. Moreover, the findings of this research can be used for BIM evaluation and safety guidance in highway engineering construction projects, thereby advancing the level of information technology in construction safety management.

Note: The first author of this paper is Liu Guangyu, senior engineer of Guangdong Road and Bridge Construction and Development Co., LTD. I am the corresponding author. The authors also include doctoral student An Peng and research group member Wu Zhen. The research results have been funded by the national key research and development program of China.

2023-09-22

"A passive earth pressure model test device for finite viscous soil behind a flexible retaining wall of foundation pit" has obtained the invention patent certificate (patent number: ZL201911214637.X).

The invention provides an active and passive earth pressure model test device for finite viscous soil behind a flexible retaining wall of a foundation pit, which comprises: a test bench unit comprising a fixed steel frame, a model box embedded in a fixed steel frame and a transparent movable baffle plate. The model box is equipped with a model viscous soil with a ratio similar to the weighted average value of physical and mechanical properties of the prototype viscous soil; The loading and unloading unit comprises at least five displacement control handles, a reaction device and an associated model wall. The displacement control handle is uniformly arranged in the buried depth direction of the model wall. One side support of the displacement control handle is fixed on the reaction device, and the other side is fixed with the model wall. Contact and non-contact monitoring unit, contact monitoring unit includes: micro earth pressure gauge, micro displacement meter; The non-contact monitoring unit includes a PIV monitoring unit. The law and magnitude of the passive earth pressure and displacement of soft viscous soil behind the wall of flexible enclosure structure can be obtained under various limited soil widths.

2023-09-09

On September 9, I was invited to Laoshan Laboratory to attend a meeting on Marine environmental monitoring, and made a report on the work and achievements of the research group in related aspects. In addition, Li Sunwei, a core member of the research team, and Liu Yi, a doctoral student, also participated in the meeting.

Laoshan Laboratory is a breakthrough, leading and platform integrated new scientific research institution in the Marine field approved by the State. It is jointly built by the State ministries, Shandong Province and Qingdao, aiming to focus on the innovation-driven development strategy and the overall requirements of building a maritime power, adhere to the "four aspects", carry out scientific and technological innovation and institutional innovation, and strive to build a national Marine strategic scientific and technological force.

2023-08-30

Approaches Improving Cesium Rendering Performance for Displaying Massive 3D Models has been published in the Journal of Information Technology in Civil Engineering and Architecture.

Rendering performance optimization is needed to display dense 3D models in Cesium requires improving the. However, the native approaches are unstable and will cause bad rendering results. To avoid this problem as much as possible, a mechanism is proposed in this paper to enable high-performance rendering when the camera state changes in which the camera states change pauses primitives loading, and applies parameter settings and algorithms that can improve rendering performance but may cause bad rendering results. Besides, this paper proposes a heap-based 3D tile draws command limitation approach, which can directly limit the number of draw commands and reduce the amount of GPU computation. The results prove that the mechanism of high-performance rendering when camera state changes are feasible. The mechanism outperforms the max screen space error (MSSE) increasing and the draw commands limiting, which excels reducing the resolution scale (RS) in improving rendering performance. Limiting the draw commands can ensure the stability of rendering performance compared with increasing MSSE.

Note: The first author of this paper is Wang Hengwei, a postdoctoral fellow, and I am the corresponding author. The research results have been funded by the National Key Research and Development Program of China and the National Natural Science Foundation of China.