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学者姓名：傅丽碧
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Abstract ：
为克服开展真实残障人员运动实验的挑战,设计并研制了一个能够模拟残障人员和健全人员组成的异质人群运动教学实验平台.结合文献调研、可控实验、图像处理等方法,设计了通道中残障人员和健全人员组成的异质人群单向运动实验方案,模拟真实的异质人群运动过程.基于理论分析,从人员运动轨迹、典型行为特征、速度、密度、流量等角度分析异质人群的基本运动规律,结果符合经验结论,验证了该平台模拟异质人群运动的可行性和合理性.该实验平台可为交通安全、安全管理等领域的实验研究与教学创新提供参考.
Keyword ：
图像处理 图像处理 实验平台 实验平台 异质人群 异质人群 残障人员 残障人员 运动特征 运动特征
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| GB/T 7714 | 傅丽碧 , 刘宇星 , 施永乾 . 模拟残障人员和健全人员组成的异质人群运动教学实验平台设计 [J]. | 实验技术与管理 , 2025 , 42 (2) : 52-58 . |
| MLA | 傅丽碧 等. "模拟残障人员和健全人员组成的异质人群运动教学实验平台设计" . | 实验技术与管理 42 . 2 (2025) : 52-58 . |
| APA | 傅丽碧 , 刘宇星 , 施永乾 . 模拟残障人员和健全人员组成的异质人群运动教学实验平台设计 . | 实验技术与管理 , 2025 , 42 (2) , 52-58 . |
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There is a high proportion of social groups in crowds. The influence of social groups on crowd mobility is particularly evident in emergency situations and in confined movement environments. However, studies on the characteristics of social group movement through a bottleneck with different widths are limited. Therefore, the computation and simulation are performed in a corridor with a bottleneck involving individuals and three types of groups (namely two-person, three-person and four-person groups) using a modified multi-grid model. The original multigrid model is modified by introducing interactions between pedestrians, avoidance behavior and group behavior, and validated by data from a controlled experiment. It is found that the group configuration can be adjusted to the changing scenarios during the passing movement. The movement efficiency and level of walking comfort for pedestrians are significantly improved in wider bottlenecks. Passing efficiency is evidently increased and congestion is reduced, when social groups occupy a large proportion of the crowd in a narrow bottleneck. These numerical findings may provide new insights for analyzing nonlinear pedestrian social group dynamics.
Keyword ：
Bottlenecks Bottlenecks Group behavior Group behavior Pedestrian dynamics Pedestrian dynamics Simulation Simulation The multi-grid model The multi-grid model
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| GB/T 7714 | He, Yangjian , Shi, Qingxin , Fu, Libi et al. Application of the multi-grid modelling method to pedestrian social group dynamics through a bottleneck [J]. | SIMULATION MODELLING PRACTICE AND THEORY , 2025 , 139 . |
| MLA | He, Yangjian et al. "Application of the multi-grid modelling method to pedestrian social group dynamics through a bottleneck" . | SIMULATION MODELLING PRACTICE AND THEORY 139 (2025) . |
| APA | He, Yangjian , Shi, Qingxin , Fu, Libi , Chen, Qiyi , Shen, Chenxin , Zhang, Yu et al. Application of the multi-grid modelling method to pedestrian social group dynamics through a bottleneck . | SIMULATION MODELLING PRACTICE AND THEORY , 2025 , 139 . |
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There is a significant increase in the demand for lightweight and compressible electromagnetic interference (EMI) shielding materials in various fields. Though MXene aerogels hold immense potential as EMI shielding materials, several shortcomings including poor water resistance, low mechanical robustness, easy oxidation, and high cost limits of their wide application. This work reported a novel strategy involving the co-assembly of MXene and cellulose nanofibers (CNF) through directional freezing and freeze-drying, followed by the capsulation-concreting of a thin layer of flame-retardant polydimethylsiloxane (PDMS) onto the aerogel, to multi-hierarchically construct a series of high-performance CNF/MXene/PDMS composite aerogels. The lightweight CNF/MXene/PDMS/MPP-Zr@PDA composite aerogel achieved ultrahigh EMI shielding effectiveness of 96.8 dB (X-band) and utilization efficiency of 1713.27 dB g g-1. Furthermore, the PDMS coating effectively imparted excellent compressibility and durability to the 3D scaffold, resulting in a compressive strength of 17.01 kPa for the composite aerogel, representing 199.5% increase compared to CNF aerogel. Additionally, the composite aerogel exhibited outstanding flame-retardant properties (54.6% reduction in heat release rate), ultralow thermal conductivity of 0.0530 W m-1 K-1 and excellent hydrophobicity. Therefore, the durable and flame-retardant CNF/MXene/PDMS composite aerogels hold promising applications in EMI protection, thermal management, smart fire detection, and other specific fields.
Keyword ：
electromagnetic interference shielding electromagnetic interference shielding flame retardancy flame retardancy mechanical durability mechanical durability multihierarchical structure multihierarchical structure thermal insulation thermal insulation
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| GB/T 7714 | Shi, Yongqian , Zhu, Yanjun , Liu, Shan et al. Multi-Hierarchically Constructing Durable and Flame Retardant CNF/MXene/PDMS Composite Aerogels for Superhigh Electromagnetic Shielding Performance and Ultralow Thermal Conductivity [J]. | SMALL , 2025 . |
| MLA | Shi, Yongqian et al. "Multi-Hierarchically Constructing Durable and Flame Retardant CNF/MXene/PDMS Composite Aerogels for Superhigh Electromagnetic Shielding Performance and Ultralow Thermal Conductivity" . | SMALL (2025) . |
| APA | Shi, Yongqian , Zhu, Yanjun , Liu, Shan , Fu, Libi , Chen, Juntian , Liu, Jiawen et al. Multi-Hierarchically Constructing Durable and Flame Retardant CNF/MXene/PDMS Composite Aerogels for Superhigh Electromagnetic Shielding Performance and Ultralow Thermal Conductivity . | SMALL , 2025 . |
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Luggage-laden pedestrians are a common group at transportation hubs. However, there is a lack of experimental research related to the heterogeneous crowds with luggage through subway exit gates. Therefore, this study focuses on the impacts of ticket gate layout on the movement of heterogeneous pedestrian flow with luggage through a controlled experiment. The variables involved in this study comprise three layout types of ticket gates and mixture ratio of luggage-laden pedestrians. An open-source software (i.e., PeTrack) is adopted for the extraction of pedestrian movement trajectories from recording videos. The macro spatial–temporal movement distribution (i.e., trajectory features, density distribution and movement time) and microscopic movement characteristics (i.e., selection preference and queuing features) of pedestrians are analyzed. The results establish that the orientation of the ticket gates perpendicular to the direction of pedestrian flow is advantageous for safety and efficiency compared to parallel arrangements. Under the perpendicular conditions, the facility can better adapt to an increased mixture ratio of luggage-laden pedestrians, and widened gate corridors on the far left is useful to enhance efficiency. Under the parallel conditions, the mixture ratio of luggage-laden pedestrians markedly affects passing efficiency and safety, and widened gate corridors at the far end is more favourable. Additionally, a special movement pattern was observed during the turning process of multi-column pedestrian queues, i.e., the “skip-level” behavior, leading to the phenomenon of “queue proliferation”. These results aim to adapt pedestrian flow line designs in subway station to new conditions, and enhance pedestrian passage efficiency and safety. © 2024 Elsevier Ltd
Keyword ：
Heterogeneous crowds Heterogeneous crowds Luggage-laden pedestrians Luggage-laden pedestrians Movement characteristics Movement characteristics Pedestrian safety Pedestrian safety Subway stations Subway stations Ticket gate layout Ticket gate layout
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| GB/T 7714 | Fu, L. , Shen, C. , Chen, Y. et al. The effect of the ticket gate layout on mixed-flow movement including luggage-laden pedestrians in metro stations [J]. | Safety Science , 2024 , 179 . |
| MLA | Fu, L. et al. "The effect of the ticket gate layout on mixed-flow movement including luggage-laden pedestrians in metro stations" . | Safety Science 179 (2024) . |
| APA | Fu, L. , Shen, C. , Chen, Y. , He, Y. , Zhang, Y. , Shi, Y. et al. The effect of the ticket gate layout on mixed-flow movement including luggage-laden pedestrians in metro stations . | Safety Science , 2024 , 179 . |
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The combination of electromagnetic interference (EMI) shielding performance and flame-retardant property is essential for applications in the field of electronics and electrics. To date, there have been few successful cases in achieving such portfolios, due to the different mechanisms and even mutual exclusivity of these two attributes. Herein, an ammonium polyphosphate@chitosan@carbon nanotube (APP@CS@MWCNT) core-multishell hybrid was synthesized by microencapsulation technology. Then, the hybrid was introduced into TPU matrix to fabricate TPU composites, acting as surface layer. Meanwhile, MXene film was used as intermediate layer to construct hierarchical TPU composites. The obtained results showed that after introduction of 1 wt% APP@CS@MWCNT hybrid, the peak of heat release rate (PHRR) and the peak of smoke produce rate (PSPR) of TPU composites decreased by 67.4% and 35.6%, respectively, compared with those of pure TPU. Owing to multiple reflection losses, interface polarization losses, and charge carrier movement-induced thermal dissipation, TPU/ 15AC@4M-SW exhibited the highest EMI shielding performance, and obtained shielding effectiveness values of 35.7 dB and 38.9 dB in X band and K band, respectively.
Keyword ：
Electromagnetic interference shielding Electromagnetic interference shielding Flame retardancy Flame retardancy Hierarchical structure Hierarchical structure MXene MXene Thermoplastic polyurethane Thermoplastic polyurethane
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| GB/T 7714 | Chen, Kexin , Wang, Hengrui , Shi, Yongqian et al. Realizing balanced flame retardancy and electromagnetic interference shielding in hierarchical elastomer nanocomposites [J]. | JOURNAL OF COLLOID AND INTERFACE SCIENCE , 2024 , 653 : 634-642 . |
| MLA | Chen, Kexin et al. "Realizing balanced flame retardancy and electromagnetic interference shielding in hierarchical elastomer nanocomposites" . | JOURNAL OF COLLOID AND INTERFACE SCIENCE 653 (2024) : 634-642 . |
| APA | Chen, Kexin , Wang, Hengrui , Shi, Yongqian , Liu, Miao , Feng, Yuezhan , Fu, Libi et al. Realizing balanced flame retardancy and electromagnetic interference shielding in hierarchical elastomer nanocomposites . | JOURNAL OF COLLOID AND INTERFACE SCIENCE , 2024 , 653 , 634-642 . |
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Incorporating outstanding flame retardancy and electromagnetic interference shielding effectiveness (EMI SE) into polymers is a pressing requirement for practical utilization. In this study, we first employed the principles of microencapsulation and electrostatic interaction-driven self-assembly to encapsulate polyethyleneimine (PEI) molecules and Ti3C2Tx nanosheets on the surface of ammonium polyphosphate (APP), forming a double-layer-encapsulated structure of ammonium polyphosphate (APP@PEI@Ti3C2Tx). Subsequently, flame-retardant thermoplastic polyurethane (TPU) composites were fabricated by melting the flame-retardant agent with TPU. Afterwards, by using air-assisted thermocompression technology, we combined a reduced graphene oxide (rGO) film with flame-retardant TPU composites to fabricate hierarchical TPU/APP@PEI@Ti3C2Tx/rGO composites. We systematically studied the combustion behavior, flame retardancy, and smoke-suppression performance of these composite materials, as well as the flame-retardant mechanism of the expansion system. The results indicated a significant improvement in the interface interaction between APP@PEI@Ti3C2Tx and the TPU matrix. Compared to pure TPU, the TPU/10APP@PEI@1TC composite exhibited reductions of 84.1%, 43.2%, 62.4%, and 85.2% in peak heat release rate, total heat release, total smoke release, and total carbon dioxide yield, respectively. The averaged EMI SE of hierarchical TPU/5APP@PEI@1TC/rGO also reached 15.53 dB in the X-band.
Keyword ：
electromagnetic shielding electromagnetic shielding flame retardancy flame retardancy self-assembly self-assembly thermoplastic polyurethane thermoplastic polyurethane
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| GB/T 7714 | Liu, Yan , Yao, Ansheng , Fu, Libi et al. Construction of Fire Safe Thermoplastic Polyurethane/Reduced Graphene Oxide Hierarchical Composites with Electromagnetic Interference Shielding [J]. | MOLECULES , 2024 , 29 (13) . |
| MLA | Liu, Yan et al. "Construction of Fire Safe Thermoplastic Polyurethane/Reduced Graphene Oxide Hierarchical Composites with Electromagnetic Interference Shielding" . | MOLECULES 29 . 13 (2024) . |
| APA | Liu, Yan , Yao, Ansheng , Fu, Libi , Xie, Shiwei , Zhang, Yijie , Xu, Peihui et al. Construction of Fire Safe Thermoplastic Polyurethane/Reduced Graphene Oxide Hierarchical Composites with Electromagnetic Interference Shielding . | MOLECULES , 2024 , 29 (13) . |
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Polymeric materials usually present substantial hazards to human health and the environment as a consequence of their flammability which leads to the emission of a great deal of heat and toxic fumes. To address this issue, it is imperative to urgently enhance the flame retardancy of polymer materials. This study focuses on the synthesis of a novel gel-silica/polydopamine double-layer microencapsulated cobalt ions (Co2+) modified ammonium polyphosphate (APP-Co@PDA@Si) and its utilization in thermoplastic polyurethane (TPU) composites. The resulting TPU composite, containing 10.0 wt% APP-Co@PDA@Si, exhibited excellent flame-retardant properties, i.e. achieving a limiting oxygen index of 30.0 % and the V-0 grade in the UL-94 test. Furthermore, peak heat release rate, total heat release, peak smoke production rate, and total smoke release of the TPU composite were decreased by 88.51 %, 66.06 %, 61.73 %, and 74.01 %, respectively, in comparison to those of pure TPU. The enhanced fire safety of the TPU composite was attributed to the synergistic effect among Co2+ catalytic carbonization, the free radicals capture effect of APP, and the flame-retardant functions of PDA and silane. This innovative strategy proposed in this work holds great promise for improving the fire-resistance of TPU.
Keyword ：
Core-shell structure Core-shell structure Multi-component flame retardant Multi-component flame retardant Smoke suppression Smoke suppression Synergistic function Synergistic function Thermoplastic polyurethane Thermoplastic polyurethane
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| GB/T 7714 | Zhu, Yanjun , Wang, Hengrui , Fu, Libi et al. Interface engineering of multi-component core-shell flame retardant towards enhancing fire safety of thermoplastic polyurethane and mechanism investigation [J]. | APPLIED MATERIALS TODAY , 2024 , 38 . |
| MLA | Zhu, Yanjun et al. "Interface engineering of multi-component core-shell flame retardant towards enhancing fire safety of thermoplastic polyurethane and mechanism investigation" . | APPLIED MATERIALS TODAY 38 (2024) . |
| APA | Zhu, Yanjun , Wang, Hengrui , Fu, Libi , Xu, Peihui , Rao, Guanjie , Xiao, Wei et al. Interface engineering of multi-component core-shell flame retardant towards enhancing fire safety of thermoplastic polyurethane and mechanism investigation . | APPLIED MATERIALS TODAY , 2024 , 38 . |
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To investigate the influencing mechanism of helping behavior on evacuation dynamics of heterogeneous crowds, a revised social force model that incorporates the helping behavior is proposed in this paper. The influence factors including following strategy, assisted proportion, exit angle, exit position and width, initial distribution and body size of assisted person, etc. on evacuation process are systematically analyzed. Simulation results indicate that the helping behavior has a significant impact on the evacuation process. The helping relation is vulnerable to be broken at the exit area and individuals that need assistance are more likely to be stuck under this circumstance. Besides, it is found that the proper change of exit parameters such as exit position, exit width and exit angle can alleviate the negative effect of helping behavior on the evacuation efficiency. Furthermore, the motion ability, initial position and body size of difficult person are also crucial to the evacuation outcome.
Keyword ：
Evacuation dynamics Evacuation dynamics Helping behavior Helping behavior Heterogeneous crowd Heterogeneous crowd Social force model Social force model
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| GB/T 7714 | Cao, Shuchao , Wang, Yan , Liang, Jia et al. Evacuation dynamics of heterogeneous crowds: The role of helping others [J]. | PHYSICS LETTERS A , 2024 , 527 . |
| MLA | Cao, Shuchao et al. "Evacuation dynamics of heterogeneous crowds: The role of helping others" . | PHYSICS LETTERS A 527 (2024) . |
| APA | Cao, Shuchao , Wang, Yan , Liang, Jia , Fu, Libi . Evacuation dynamics of heterogeneous crowds: The role of helping others . | PHYSICS LETTERS A , 2024 , 527 . |
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| GB/T 7714 | Shi, Yongqian , Huang, Ruizhe , Liu, Miao et al. Hierarchical rigid porous composites towards impact resistance and fire safety (vol 270, 111139, 2024) [J]. | COMPOSITES PART B-ENGINEERING , 2024 , 273 . |
| MLA | Shi, Yongqian et al. "Hierarchical rigid porous composites towards impact resistance and fire safety (vol 270, 111139, 2024)" . | COMPOSITES PART B-ENGINEERING 273 (2024) . |
| APA | Shi, Yongqian , Huang, Ruizhe , Liu, Miao , Han, Junqiang , Xu, Peihui , Feng, Yuezhan et al. Hierarchical rigid porous composites towards impact resistance and fire safety (vol 270, 111139, 2024) . | COMPOSITES PART B-ENGINEERING , 2024 , 273 . |
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Luggage-laden pedestrians are a common group at transportation hubs. However, there is a lack of experimental research related to the heterogeneous crowds with luggage through subway exit gates. Therefore, this study focuses on the impacts of ticket gate layout on the movement of heterogeneous pedestrian flow with luggage through a controlled experiment. The variables involved in this study comprise three layout types of ticket gates and mixture ratio of luggage-laden pedestrians. An open-source software (i.e., PeTrack) is adopted for the extraction of pedestrian movement trajectories from recording videos. The macro spatial-temporal movement distribution (i.e., trajectory features, density distribution and movement time) and microscopic movement characteristics (i.e., selection preference and queuing features) of pedestrians are analyzed. The results establish that the orientation of the ticket gates perpendicular to the direction of pedestrian flow is advantageous for safety and efficiency compared to parallel arrangements. Under the perpendicular conditions, the facility can better adapt to an increased mixture ratio of luggage-laden pedestrians, and widened gate corridors on the far left is useful to enhance efficiency. Under the parallel conditions, the mixture ratio of luggage-laden pedestrians markedly affects passing efficiency and safety, and widened gate corridors at the far end is more favourable. Additionally, a special movement pattern was observed during the turning process of multi-column pedestrian queues, i.e., the "skip-level" behavior, leading to the phenomenon of "queue proliferation". These results aim to adapt pedestrian flow line designs in subway station to new conditions, and enhance pedestrian passage efficiency and safety.
Keyword ：
Heterogeneous crowds Heterogeneous crowds Luggage-laden pedestrians Luggage-laden pedestrians Movement characteristics Movement characteristics Pedestrian safety Pedestrian safety Subway stations Subway stations Ticket gate layout Ticket gate layout
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| GB/T 7714 | Fu, Libi , Shen, Chenxin , Chen, Yunqian et al. The effect of the ticket gate layout on mixed-flow movement including luggage-laden pedestrians in metro stations [J]. | SAFETY SCIENCE , 2024 , 179 . |
| MLA | Fu, Libi et al. "The effect of the ticket gate layout on mixed-flow movement including luggage-laden pedestrians in metro stations" . | SAFETY SCIENCE 179 (2024) . |
| APA | Fu, Libi , Shen, Chenxin , Chen, Yunqian , He, Yangjian , Zhang, Yu , Shi, Yongqian et al. The effect of the ticket gate layout on mixed-flow movement including luggage-laden pedestrians in metro stations . | SAFETY SCIENCE , 2024 , 179 . |
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