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    STUDY ON IMPROVEMENT FOR THE EXCITATION PERFORMANCE OF BV500 TYPE CONTROLLED SEISMIC SOURCE VIBRATOR PLATE BASED ON TOPOLOGY OPTIMIZATION METHOD by HUANG Zhiqiang, FU Mingwei, XI Yuxi, LI Gang, WANG Ruohao, PU Wei

    Published 2025-02-01
    “…During the operation of the BV500 type controlled seismic source vibrator in Sichuan and Chongqing areas, due to the improper plate design, the vibration energy down-transfer rate is low and the excitation signal distortion is serious.Therefore, the continuum topology optimization method was introduced, and a variable density method of the solid isotropic material with penalization (SIMP) model was used to optimize the design of BV500 controlled seismic source vibrator plate from two aspects — reducing mass and increasing stiffness, and an “octagonal I-steel-20a” plate was innovatively developed.After optimization, the mass of the plate was reduced by 45.29%, and the stiffness of the plate was increased by 79.92%, the vibration performance of the plate before and after optimization is studied.The simulation results show that compared with the original aluminum alloy plate, the energy down-transfer rate of the “octagonal I-steel-20a” plate increases by 15.11%,the displacement amplitude of the ground surface contact center point increases by 43.74%, and the amplitude of the interaction force increases by 40.56%.The field experiment shows that when the “octagonal I-beam-20a” plate is excited, the effective value of the average vibration velocity of the near-field signal of the detector is increased by 22.23%, and the effective value of the average vibration velocity of the far-field signal of the detector is increased by 39%, the law is consistent with the numerical simulation conclusion of controlled seismic source road excitation.The excitation performance of the “octagonal I-beam-20a” plate is better than that of the original aluminum alloy integral plate, which effectively improves the road excitation effect of BV500 type controlled seismic source in Sichuan and Chongqing areas.…”
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  3. 663

    Traffic light optimization (TLO) using reinforcement learning for automated transport systems by Mohammad Mehedi Hassan, Stephen Karungaru, Kenji Terada

    Published 2025-02-01
    “…In our previous work, we used fuzzy logic to control the traffic light where the time was fixed but in this paper, the waiting time becomes a variable that changes depending on other road variables like vehicles, pedestrians, and times. …”
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    Estimating intersections' near-crash conflicts with the drone-based image-recording data by Yen-Lin Huang, Yen-Hsiang Chen

    Published 2025-03-01
    “…The proposed new surrogate variable, featuring its direct relevance to road users’ maneuvers, e.g. braking from high-precision time-varying braking rate information uniquely available from the DIRD, has reflected crash-prone contributors attributed to driving behaviors and intersections’ overall environments. …”
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  7. 667

    The Impact of Tidal Flooding on Decreasing Land Values in the Areas of Tugu District, Semarang City by Westi Utami, Yuli Ardianto Wibowo, Fajar Buyung Permadi

    Published 2021-04-01
    “…In this context, the variable of tidal flooding vulnerability greatly affects the stagnation of land prices and even decreases in land prices, while the positive accessibility variable is the location of land on national and local roads that has experienced a very high price increase.…”
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    FLAME 1.0: a novel approach for modelling burned area in the Brazilian biomes using the maximum entropy concept by M. L. F. Barbosa, M. L. F. Barbosa, M. L. F. Barbosa, D. I. Kelley, C. A. Burton, I. J. M. Ferreira, I. J. M. Ferreira, R. M. da Veiga, A. Bradley, P. G. Molin, L. O. Anderson

    Published 2025-06-01
    “…We assessed burned-area responses to different explanatory variable groups. The model showed adequate performance for all biomes and fire categories. …”
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    Change in elevation predicts 100 km ultra marathon performance by Beat Knechtle, Katja Weiss, David Valero, Volker Scheer, Elias Villiger, Pantelis T. Nikolaidis, Marilia Andrade, Ivan Cuk, Robert Gajda, Thomas Rosemann, Mabliny Thuany

    Published 2025-07-01
    “…Running on a track (9.32 km/h) was the fastest ahead of road running (8.11 km/h), trail running (6.21 km/h) and mountain running (5.74 km/h). …”
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    Performance Limits of Hydraulic-Binder Stabilization for Dredged Sediments: Comparative Case Studies by Abdeljalil Zri, Nor-Edine Abriak, Amine el Mahdi Safhi, Shima Pilehvar, Mahdi Kioumarsi

    Published 2025-07-01
    “…Lime–cement stabilization offers one pathway, yet field performance is highly variable. This study juxtaposes two French marine dredged sediments—DS-F (low plasticity, organic matter (OM) ≈ 2 wt.%) and DS-M (high plasticity, OM ≈ 18 wt.%)—treated with practical hydraulic road binder (HRB) dosages. …”
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