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17th 3d GeoInfo Conference

作者： Beil, C. Kendir, M. Ruhdorfer, R. Kolbe, T. H. Tech Univ Munich Chair Geoinformat Munich Germany VirtualcitySYSTEMS GmbH Tauentzienstr 7b-C D-10789 Berlin Germany

Semantic 3d city models can serve as anchor points for different components of urban digital twins. In addition to static 3d models such as buildings, transportation infrastructure, vegetation, or city furniture, this can also include dynamic processes such as traffic movement or changing traffic signals. Integrating these aspects into a dynamic, realistic, and accessible 4d visualization presents a number of requirements and challenges, which are discussed. While the City Geography Markup Language (CityGML) is a well established OGC standard for modeling and exchanging semantic 3d city models, the Cesium Language (CZML) provides capabilities for visualizing time-dependant properties that can be displayed in the Cesium virtual globe. Results of the open-source microscopic traffic simulation tool SUMO include information on locations and orientations of vehicles, bicycles, pedestrians and other traffic members as well as traffic signal information and can be exported as a CSV table. In order to allow a 4d visualization of these simulation results, a scheme for deriving 3d + t CZML documents from data given as 2d + t CSV files is presented. Additionally, dynamically changing traffic lights are integrated. Based on data available for the city of Munich, a CityGML-compliant streetspace model is generated. This enables the combination of traffic simulation results and semantic 3d city models within a common Cesium based web-visualization and allows a direct and platform independent access to realistic visualizations of streetspace activities. Since this often results in a huge amount of data, a spatio-temporal tiling strategy enabling the visualization of large CZML data is presented.

关键词： digital Twin 4d visualization 4d tiling City Model Traffic Simulation CityGML CZML SUMO

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Research on Application of Construction Model Based on 4d visualization in Construction of Intelligent Substation

Research on Application of Construction Model Based on 4D Vi...

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Asia Conference on Geological Research and Environmental Technology (GRET)

作者： Ren, Chunguang Wang, Yachen Xue, Kai Zhi, Shenglong Chen, Tao Shanxi Elect Power Co SGCC Econ & Elect Res Inst Taiyuan 030002 Peoples R China

At present, the existing technology has not yet realized the conversion process from the digital design model of the substation project to the construction model. This paper provides a solution to this problem. After the design model GIM is loaded into unity, the vertices and materials of the GIM model are read and loaded into the scene through the company's independent research and development of three-dimensional design software (STd-R). The model level information returned by the terminal corresponds to the loaded model one by one, thereby obtaining a model tree structure. The research results of the thesis provide convenience for the design and construction of power grid substation projects.

关键词： 4d visualization construction model intelligent substation construction

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4d visualization of Painted Sculpture and Murals 25

4D Visualization of Painted Sculpture and Murals

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25th International CIPA Symposium

作者： Ai MingYao Tong Huai Shen Li Wang RuoXi Zhang Fang Zhang ZhiChao Hu QingWu Zhu YiXuan Zhang Heng Wuhan Univ Sch Remote Sensing & Informat Engn Wuhan 430079 Peoples R China Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Peoples R China Wuhan Univ Coll Chem & Mol Sci Wuhan 430079 Peoples R China

ISBN: (纸本)9781629935201

Most cultural heritage applications address visualization with using various media or platforms: desktop-based multimedia presentations, museum kiosks, or videos produced with computer animation. However, these techniques can not directly reveal or show the course that the colorful surface of painted sculpture and murals becomes faint along with the change of the climate and time. Most current techniques just preserve the current appearance and disseminate the current situation of the painted sculpture and murals. The course how these forms of cultural heritage change along the time has not been visualized. In this paper we developed an approach to modelling of painted sculpture and murals that has undergone changes over the years. different hypotheses has also be given if there is uncertainty. A painted sculpture of Mogao Grottoes is used to demonstate this approach.

关键词： Chemical Analysis Image Segmentation 3d Reconstruction 4d visualization Painted Sculpture and Murals

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Forearm muscle activity estimation based on anatomical structure of muscles

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ANATOMICAL RECORd-AdVANCES IN INTEGRATIVE ANATOMY ANd EVOLUTIONARY BIOLOGY 2023年第4期306卷 741-763页

作者： Okajima, Shotaro Costa-Garcia, Alvaro Ueda, Sayako Yang, Ningjia Shimoda, Shingo RIKEN CBS TOYOTA Collaborat Ctr Ctr Brain Sci Moriyama Ku 2271-130 Shimo Shidami Nagoya Aichi 4630003 Japan

Estimation of muscle activity using surface electromyography (sEMG) is an important non-invasive method that can lead to a deeper understanding of motor-control strategies in humans. Measurement using multiple active electrodes is necessary to estimate not only surface muscle activity but also deep muscle activity in dynamic motion. In this paper, we propose a method for estimating muscle activity of dynamic motions based on anatomical knowledge of muscle structures. To estimate muscle activity, a large number of signal sources are set in the muscle model, and connections between the signal sources are defined a priori based on the anatomical structure of the muscles. The signal source activities are first estimated by minimizing the Kullback-Leibler divergence with a continuity cost. Then, the muscle activity is computed from the signal source activity. In the experiments, five healthy participants performed five types of motion and the forearm sEMG was measured with 20-channel active electrodes. The estimation results for these motions were visualized in four dimensions as the three-dimensional position of the muscle over time. The results showed that the estimation was accurate, with a reproduction rate of 95% for the measured sEMG and continuity of the muscle activity. In addition, the results suggest the advantage of the proposed method over the conventional approaches in terms of estimating the muscle activity for both dynamic and abnormal motions.

关键词： anatomical constraint Kullback-Leibler divergence medium-density sEMG sensor muscle activity estimation 4d visualization

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4d-based automation of heavy lift planning in industrial construction projects

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CANAdIAN JOURNAL OF CIVIL ENGINEERING 2021年第9期48卷 1115-1129页

作者： Han, SangHyeok Lei, Zhen Hermann, Ulrich (Rick) Bouferguene, Ahmed Al-Hussein, Mohamed Concordia Univ Ctr Innovat Construct & Infrastruct Engn & Manage Dept Civil Bldg & Environm Engn Montreal PQ Canada Univ New Brunswick Dept Civil Engn Off Site Construct Res Ctr OCRC Fredericton NB E3B 5A3 Canada PCL Ind Management Inc Edmonton AB T6E 3P4 Canada Univ Alberta Campus St Jean Edmonton AB T6C 4G9 Canada Univ Alberta Dept Civil & Environm Engn Edmonton AB T6G 2W2 Canada

In northern Canada, due to the harsh weather and high labor cost, contractors prefer to using modular construction approach to complete heavy industrial projects, where mobile crane are used for onsite module installations. In current practice, module lifts are often planned manually by rigging engineers. With a large number of heavy lifts to be analyzed per project, the planning process is tedious and error prone. This paper represents a data-driven crane management system with three features: (1) identification of design errors in lifting planning;(2) responses to design changes;and (3) dynamic 3d trajectory-based lifting visualization. It covers two types of crane operations: pick from a fixed location, and pick and walking operation. This developed system helps reduce lifting time and improves safety and quality, where various lifting scenarios need to be analyzed. The system has been implemented at a collaborator company for demonstration and validation.

关键词： heavy industrial project crane management system 4d visualization 3d motion planning lift path planning

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Combining direct 3d Volume Rendering and Magnetic Particle Imaging to Advance Radiation-Free Real-Time 3d Guidance of Vascular Interventions

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CARdIOVASCULAR ANd INTERVENTIONAL RAdIOLOGY 2020年第2期43卷 322-330页

作者： Weller, dominik Salamon, Johannes M. Froelich, Andreas Moeddel, Martin Knopp, Tobias Werner, Rene Univ Med Ctr Hamburg Eppendorf Dept Computat Neurosci Martinistr 52 D-20246 Hamburg Germany Univ Med Ctr Hamburg Eppendorf Dept Diagnost & Intervent Radiol & Nucl Med Martinistr 52 D-20246 Hamburg Germany Univ Med Ctr Hamburg Eppendorf Dept Diagnost & Intervent Neuroradiol Martinistr 52 D-20246 Hamburg Germany Univ Med Ctr Hamburg Eppendorf Sect Biomed Imaging Lottestr 55 D-22529 Hamburg Germany Hamburg Univ Technol Inst Biomed Imaging Schwarzenbergstr 95C D-21073 Hamburg Germany

Purpose Magnetic particle imaging (MPI) is a novel tomographic radiation-free imaging technique that combines high spatial resolution and real-time capabilities, making it a promising tool to guide vascular interventions. Immediate availability of 3d image data is a major advantage over the presently used digital subtraction angiography (dSA), but new methods for real-time image analysis and visualization are also required to take full advantage of the MPI properties. This laboratory study illustrates respective techniques by means of three different patient-specific 3d vascular flow models. Material and Methods The selected models corresponded to typical anatomical intervention sites. Routine patient cases and image data were selected, relevant vascular territories segmented, 3d models generated and then 3d-printed. Printed models were used to perform case-specific MPI imaging. The resulting MPI images, direct volume rendering (dVR)-based fast 3d visualization options, and their suitability to advance vascular interventions were evaluated and compared to conventional dSA. Results The experiments illustrated the feasibility and potential to enhance image interpretation during interventions by using MPI real-time volumetric imaging and problem-tailored dVR-based fast (approximately 30 frames/s) 3d visualization options. These options included automated viewpoint selection and cutaway views. The image enhancement potential is especially relevant for complex geometries (e.g., in the presence of superposed vessels). Conclusion The unique features of the as-yet preclinical imaging modality MPI render it promising for guidance of vascular interventions. Advanced fast dVR could help to fulfill this promise by intuitive visualization of the 3d intervention scene in real time.

关键词： Magnetic particle imaging Vascular imaging 4d visualization Real-time image processing

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Connectivity Gradient in the Human Left Inferior Frontal Gyrus: Intraoperative Cortico-Cortical Evoked Potential Study

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CEREBRAL CORTEX 2020年第8期30卷 4633-4650页

作者： Nakae, Takuro Matsumoto, Riki Kunieda, Takeharu Arakawa, Yoshiki Kobayashi, Katsuya Shimotake, Akihiro Yamao, Yukihiro Kikuchi, Takayuki Aso, Toshihiko Matsuhashi, Masao Yoshida, Kazumichi Ikeda, Akio Takahashi, Ryosuke Ralph, Matthew A. Lambon Miyamoto, Susumu Kyoto Univ Dept Neurosurg Grad Sch Med Kyoto 6068507 Japan Kyoto Univ Dept Neurol Grad Sch Med Kyoto 6068507 Japan Cleveland Clin Epilepsy Ctr Cleveland OH 44106 USA RIKEN Ctr Biosyst Dynam Res Lab Brain Connect Imaging Kobe Hyogo 6500047 Japan Kyoto Univ Dept Epilepsy Movement Disorders & Physiol Grad Sch Med Kyoto 6068507 Japan Univ Cambridge MRC Cognit & Brain Sci Unit Cambridge CB2 7EF England Shiga Gen Hosp Dept Neurosurg Moriyama Shiga 5240022 Japan Kobe Univ Div Neurol Grad Sch Med Kobe Hyogo 6500017 Japan Ehime Univ Dept Neurosurg Grad Sch Med To On Ehime 7910295 Japan

In the dual-stream model of language processing, the exact connectivity of the ventral stream to the anterior temporal lobe remains elusive. To investigate the connectivity between the inferior frontal gyrus (IFG) and the lateral part of the temporal and parietal lobes, we integrated spatiotemporal profiles of cortico-cortical evoked potentials (CCEPs) recorded intraoperatively in 14 patients who had undergone surgical resection for a brain tumor or epileptic focus. Four-dimensional visualization of the combined CCEP data showed that the pars opercularis (Broca's area) is connected to the posterior temporal cortices and the supramarginal gyrus, whereas the pars orbitalis is connected to the anterior lateral temporal cortices and angular gyrus. Quantitative topographical analysis of CCEP connectivity confirmed an anterior-posterior gradient of connectivity from IFG stimulus sites to the temporal response sites. Reciprocality analysis indicated that the anterior part of the IFG is bidirectionally connected to the temporal or parietal area. This study shows that each IFG subdivision has different connectivity to the temporal lobe with an anterior-posterior gradient and supports the classical connectivity concept of dejerine;that is, the frontal lobe is connected to the temporal lobe through the arcuate fasciculus and also a double fan-shaped structure anchored at the limen insulae.

关键词： 4d visualization cortico-cortical evoked potential dual-stream language model fronto-temporal radiation

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Toward employing the full potential of Magnetic Particle Imaging: exploring visualization techniques and clinical use cases for real-time 3d vascular imaging

Toward employing the full potential of Magnetic Particle Ima...

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Conference on Medical Imaging - Biomedical Applications in Molecular, Structural, and Functional Imaging

作者： Werner, Rene Weller, dominik Salamon, Johannes Moeddel, Martin Knopp, Tobias Univ Med Ctr Hamburg Eppendorf Dept Computat Neurosci Hamburg Germany Univ Med Ctr Hamburg Eppendorf Dept Diagnost & Intervent Radiol & Nucl Med Hamburg Germany Univ Med Ctr Hamburg Eppendorf Sect Biomed Imaging Hamburg Germany Hamburg Univ Technol Inst Biomed Imaging Hamburg Germany

ISBN: (纸本)9781510625549

Magnetic particle imaging (MPI) is a relatively young, radiation-free imaging modality that measures the interaction between superparamagnetic nanoparticles and magnetic fields. Compared to standard imaging modalities, a key feature of MPI is its ability to measure 3d volumes of relatively high spatial resolution in real-time, while still maintaining high sensitivity. Therefore, MPI is considered promising especially for vascular imaging and interventions. Yet, to fully take advantage of the unique MPI properties, real-time 4d imaging has to be combined with appropriate real-time 4d visualization and image analysis techniques. The current work aims at identification of respective clinical use cases and scenarios to illustrate the potential of MPI in the context of vascular imaging and interventions;the implementation and exploration of suitable visualization and image analysis techniques;and evaluation and comparison of the resulting image data to standard clinical imaging approaches. The study is based on three clinical use cases and associated anatomical sites: mechanical thrombectomy (anatomical structure: middle cerebral artery, segments M1 and M2);endovascular coiling (internal carotid artery aneurysm);and chemoembolization (proper hepatic artery). Implemented visualization and image analysis options are based on direct volume rendering and cover aspects like optimal view point and view angle selection and application of cut-away views. We illustrate that combining MPI imaging and 4d visualization helps to improve vascular image interpretation.

关键词： Magnetic particle imaging MPI vascular imaging 4d visualization real-time image processing direct volume rendering

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BIM-Based Maintenance Management System for Healthcare Facilities

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JOURNAL OF PERFORMANCE OF CONSTRUCTEd FACILITIES 2021年第4期35卷 04021036-04021036页

作者： Kamal, Zahra Taghaddos, Hosein Karimi, Hossein Univ Tehran Sch Civil Engn Coll Engn Construct Engn & Management POB 4563-11155 Tehran *** Iran Univ Tehran Sch Civil Engn Coll Engn POB 4563-11155 Tehran *** Iran Amirkabir Univ Technol Dept Civil & Environm Engn 424 Hafez Ave Tehran *** Iran

The reliable maintenance management system of medical equipment influences the patients' treatment and the hospitals' performance. Although building information modeling (BIM) technology has evolved the construction industry, it does not fully comply with the facility management (FM) industry, particularly with repair and maintenance. BIM-based FM provides a structured platform to effectively capture necessary data during the construction stage for effective facility maintenance management (e.g., prioritizing maintenance work orders). despite the design improvements and preventive maintenance plans, unplanned failures are inevitable and need quick and appropriate reactions. This paper introduces an integrated BIM-based framework for effective facility maintenance management. This framework consists of an integrated maintenance database for medical equipment, a scheduling engine to prioritize and sequence work orders, and a 4d simulation module to visualize the work-order handling process semiautomatically. Case-based reasoning (CBR) is also employed in the simulation engine to capture expert knowledge and facilitate the sequencing process. The proposed framework's capabilities are demonstrated by applying and validating in a national healthcare facility in Iran.

关键词： Facility management (FM) Building information modeling (BIM) Work-order prioritization Maintenance management for medical equipment 4d visualization Case-based reasoning (CBR)

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A BIM approach for construction safety: applications, barriers and solutions

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ENGINEERING CONSTRUCTION ANd ARCHITECTURAL MANAGEMENT 2019年第9期26卷 1855-1877页

作者： Marefat, Akbar Toosi, Hossein Hasankhanlo, Reza Mahmoudi Univ Tehran Dept Construct & Project Management Tehran Iran

Purpose Construction industry bears a lot of casualties and accidents more than other high-risk industries annually. Thus, the use of new technologies such, as building information modeling, automatic rule checking, information technology-based safety systems in order to implement the rules and safety standards, better controls the performance of workers on site and make high coordination between operational executives, leading to create a secure environment in projects by reducing accidents. The paper aims to discuss these issues. design/methodology/approach - In this study, a researcher-designed questionnaire was distributed among 200 companies that are active in the field of construction to evaluate the effect of building informationmodel (BIM) for safety projects and barriers to adoption. Only 70 percent of questionnaires were returned. Statistical Package for the Social Sciences analysis has been used to determine the correlation coefficient among the respondents. Findings - The results show the factors that lead to failure in the adoption of BIM in Iran are lack of well-trained personnel, proper social infrastructure, guidance and governmental supports. Originality/value - Finally, the authors presented solutions for overcoming barriers and proposed some factors leading to the successful adoption of BIM in Iran.

关键词： Barriers BIM Solutions HSE 4d visualization

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