2023-02-10

On February 9, the Winter vacation social practice detachment of Tsinghua University visited the Institute for Ocean Engineering  to carry out exchange activities. The detachment consists of 55 undergraduates majoring in civil water conservancy and ocean engineering, energy and power engineering, aerospace engineering, theory and applied mechanics, etc.

The detachment was divided into three groups and visited the engineering pool laboratory, the digital twin laboratory (our research group) and the gas hydrate laboratory located in the Ocean Building. Teachers and members of the Institute for Ocean Engineering  explained the visiting group. Afterwards, the teachers and students of the Institute had a discussion and exchange with the members of the detachment. I presided over the exchange meeting and introduced the history and development orientation of Shenzhen International Graduate School and Institute for Ocean Engineering. The detachment held in-depth discussions with the teachers of the Institute on such topics as cooperation and development, national needs and future trends of ocean engineering, college talent training and social responsibility, hoping to further establish a more long-term and more common communication mechanism to promote the exchange and academic cooperation between teachers and students in Beijing and Shenzhen.

The successful holding of the winter vacation social practice exchange, let students further contact with society, understand society. I hope students can exercise themselves in practice, close to the society with practical actions, dedication to society!

2023-01-31

The latest software achievement of our research group, "Intelligent Monitoring System for Floating Fan Structure Health", has obtained the copyright registration certificate of computer software (registration number: 2023SR0167488).

The system is mainly oriented to the structural health monitoring of the offshore floating wind turbine, and provides a platform for checking the structural status of the floating wind turbine and simulating the structure of the floating wind turbine. Users can browse the various parts of the floating fan through three-dimensional interaction, and can also simulate and analyze the structure related to the floating fan on the interactive interface, so as to realize the overall control of the structural performance of the fan.

The system is composed of data management module, structural force analysis module, three-dimensional graphic display module, user interaction interface and other main modules. The data management module extracts and manages the required model and monitoring data from 3D model files or sensor monitoring data files; The structural stress analysis module is used to calculate the deformation and stress distribution of the structure under given load conditions. 3D graphics display module realizes real-time visualization of 3D model and structure state. User interaction interface module is used to deal with mouse, keyboard and other user input, and realize the interactive display of 3D model.

The main developers of the system include doctoral students Liu Yi and Min Yantao and master's student Ning Houchun, with guidance from Zheng Xiangyuan, a researcher at the Institute for Ocean Engineering, Tsinghua Shenzhen International Graduate School. The research was supported by the Guangdong, Hong Kong and Macao Team Project of the Guangdong Regional Joint Foundation, the Key Project of Stability Self-help for Shenzhen Institutions of Higher Learning and the China Institute for Ocean Engineering (Qingdao).

2023-01-20

In order to promote the standardized management and flourishing development of academic conferences in the field of science and technology, and to serve the self-reliance and self-improvement of high-level science and technology, the China Association for Science and Technology has issued the Guidelines for Important Academic Conferences (hereinafter referred to as the Guidelines) for five consecutive years since 2018, and has mobilized 171 national societies/association of societies and the Chinese Academy of Engineering to participate in the recommendation, and recommended 721 high-quality academic conferences annually. Among them, 82 national societies participated in the recommendation of the Guide for five consecutive years, and 34 brand academic conferences were selected in the Guide for five consecutive years.

Among them, the "National BIM Academic Conference", led by Professor Jianping Zhang of Tsinghua University and initiated by myself, hosted by the Building Information Modeling (BIM) Committee of the China Graphics Society, has been included in the "Guide" for five consecutive years! I also organized and chaired the keynote reports of the 1-6 sessions as Secretary-General of the General Assembly.

Welcome to continue to pay attention to the national BIM academic Conference!

2023-01-17

Research on semi-automatic geo-referencing approach in city information modeling has been published in the Journal of Graphics.

The 3D model lacking spatial reference needs geo-referencing in the Geographic Information System (GIS) when City Information Modeling (CIM). Based on a geometric reference point, semi-automatic geo-referencing can be achieved while ensuing accuracy. After the 3D model is imported into GIS, the local coordinate system (LCS) is transformed to the surface of the geodetic ellipsoid, based on any reference point near the model. Afterwards, the geographic reference point on the 3D model is picked up in GIS, and the LCS coordinates are calculated according to the current transformation matrix. Combined with the geodetic coordinates of the reference point, the correct transformation matrix of the model can be obtained. When there is no geographic reference point, artificial geo-referencing can be achieved by continuously estimating the geographic reference point based on this approach. The semi-automatic georeferencing approach is realized by Cesium, and is applied using a 3D model from an actual project, which proves the feasibility of the approach. The above approaches rely on the spatial transformation algorithms from LCS to ECEF coordinate system using a single reference point. The algorithms can be divided into basic approach, reference point projection approach, origin projection approach and approximate origin approach according to the features and applicable scenarios. The latter 3 algorithms are applied in verification part, and based on the calculated results, the influence of the distance between the reference point and the LCS origin on these algorithms is analyzed.

2023-01-05

On the afternoon of January 4th, Zou Dong, Secretary of the Party Committee of Guangzhou Metro Construction Management Co., Ltd. and a delegation visited Tsinghua Shenzhen International Graduate School to exchange scientific research work with members of the research group.

At the meeting, Chen Xiangxiang, a member of the research team, reported the research application and prospect of coding, open platform, IFC and other technologies in the field of rail transit. This paper makes a supplementary introduction to abstract terms such as component, construction resource, group and resource layer involved in the conceptual model of construction management, and further introduces the research progress of the research group on digital twinning and knowledge graph. Later, Secretary Zou Dong had an in-depth technical exchange with the members of the research group, and affirmed the ability of our research group to conquer the core key technologies of the intelligent construction of rail transit. He also expected that both sides could continue to strengthen cooperation, innovate and make greater achievements on the basis of the past!

Since 2014, the research group and Guangzhou Metro Construction Management Co., LTD., after eight years of joint research, established the information theory and technology system of digital twins-driven digital construction of rail transit engineering and the design standards and methods for digital construction of rail transit. Put forward and practice the digital twin driven rail transit digital integrated construction solution and management mode; A BIM convergence platform with independent property rights for rail transit engineering construction has been developed.