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Exploring the role of social determinants in the risk reduction of landslide-prone settlements: a case study of Giripurno Village in Central Java, Indonesia

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Geoenvironmental Disasters 2023年第1期10卷 29页

作者： Purwitaningsih, Santika Nhindyasari, Pramasti Dyah Sambodo, Ahmad Priyo Santosa, Amadeo Benvenuto Hilal, Atina Salsabila Wulandari, Ayu Fitriyah, S. Aisyah Azka Nurul Wijaya, Ryan Andri Asano, Junichiro Sartohadi, Junun Setiawan, Muhammad Anggri Sulaiman, Muhammad Pratiwi, Elok Surya Department of Architecture and Civil Engineering Toyohashi University of Technology Toyohashi Japan Research Center for Land Resources Management Universitas Gadjah Mada Yogyakarta Indonesia Department of Soil Science Universitas Gadjah Mada Yogyakarta Indonesia Department of Environmental Geography Universitas Gadjah Mada Yogyakarta Indonesia Department of Applied Civil Engineering Universitas Gadjah Mada Yogyakarta Indonesia Research Center for Disaster Management Universitas Gadjah Mada Yogyakarta Indonesia Department of Geography National Taiwan Normal University Taipei Taiwan

Background: The world population is still growing. The growing population caused a changes in the trend of selecting settlements location. Due to the limited flat land, people were starting to form settlements in a hilly or mountainous area which is prone to landslide. The community used to move from place to place to avoid landslides, however, it is no longer possible to implement those actions. While a lot of research has been conducted to assess the vulnerability and risk of settlements to disasters, there needs to be more research on developing settlements in landslide-prone area and their impact on disaster management. Results: High social influences can be found in the development of landslide-prone settlements of Giripurno Village. The community shows a high consideration on relatives in deciding their settlement location. Moreover, high consideration of kinship and social activity affects the arrangement of spaces in the house and directly affects the amount of space occupancy. Layout of houses in Giripurno Village were found to have large living room to accommodate family and community gatherings. Although high social dependences of one community can be beneficial in the disaster emergency response and recovery, it can also hinder the disaster mitigation effors by allowing development in an unsafe area, thus increase the risk of disasters. Conclusion: This paper discuss about how the social factors can relate to the disaster management with an emphasis on the development of settlements. This paper also highlight the aspects of space occupancy which is rarely being discussed in the disaster management related research. The result obtained by this study could provide important insight into the future disaster management in the landslide-prone settlements area. © 2023, The Author(s).

关键词： Disaster management Landslide Settlements Social factors Space arrangement Space occupancy

Ragbert: Relationship-Aligned and Grammar-Wise Bert Model for Image Captioning

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SSRN 2023年

作者： Wang, Hengyou Song, Kani Jiang, Xiang He, Zhiquan School of Science Beijing University of Civil Engineering and Architecture Beijing100044 China School of Computer Science and Technology Jiangsu Normal University Xuzhou221116 China Guangdong Multimedia Information Service Engineering Technology Shenzhen University Shenzhen518060 China

Image captioning has become one of the most popular research problems in the field of artificial intelligence. Although many studies have achieved excellent results, there still are some challenges, for example, cross-modal feature alignment lacks explicit guidance, and model-generated sentences contain grammatical errors. In this paper, we propose a relationship-aligned and grammar-wise BERT model, which integrates a relationship exploration module and a grammar enhancement module into the BERT-based model. Specifically, in the relationship exploration module, to explore relationship tags as anchors to guide semantic alignment, we design a network to calculate the cosine similarity between visual features and word vector information. For the grammar enhancement module, we construct it similarly to the BERT. That means we use two BERT modules in our framework. The first one is the main frame for generating captions, and the second one is the auxiliary model to determine whether the syntax of generated caption is correct or not. To validate the performance of our proposed model, we conduct abundant experiments on the MSCOCO dataset, Flickr30k dataset, and Flickr8k dataset. Experimental results show that our proposed method has a better performance compared to state-of-the-art approaches. © 2023, The Authors. All rights reserved.

关键词： Semantics

Isogeometric Boundary Element Analysis for 2D Transient Heat Conduction Problem with Radial Integration Method

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Computer Modeling in engineering & sciences 2021年第1期126卷 125-146页

作者： Leilei Chen Kunpeng Li Xuan Peng Haojie Lian Xiao Lin Zhuojia Fu College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China Department of Mechanical Engineering Suzhou University of Science and TechnologySuzhou215009China Key Laboratory of In-Situ Property-ImprovingMining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China Institute for Computational Engineering Faculty of ScienceTechnology and CommunicationUniversity of LuxembourgLuxembourg The York Management School University of YorkYorkYO105GDUK College of Mechanics andMaterials Hohai UniversityNanjing211100China

This paper presents an isogeometric boundary element method(IGABEM)for transient heat conduction *** Non-Uniform Rational B-spline(NURBS)basis functions,which are used to construct the geometry of the structures,are employed to discretize the physical unknowns in the boundary integral formulations of the governing *** extraction technique is employed to accelerate the evaluation of NURBS basis *** adopt a radial integration method to address the additional domain *** numerical examples demonstrate the advantage of IGABEM in dimension reduction and the seamless connection between CAD and numerical analysis.

关键词： Isogeometric analysis NURBS boundary element method heat conduction radial integration method

Research on the Design Method of Prefabricated Concrete Structure Based on BIM

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Computer-Aided Design and Applications 2023年 20卷 148-164页

作者： Yang, Fan Hussain, Saddam Fadhel, Mustafa Abbas Ghafoor, Kayhan Zrar Gannan University of Science and Technology Jiangxi Ganzhou China Department of Civil and Architecture Engineering Kyushu Institute of Technology Fukuoka Kitakyushu8040015 Japan University of Al Muthanna Samawa66001 Iraq Department of Computer Science Knowledge University Erbil44001 Iraq Department of Software & Informatics Engineering Salahaddin University-Erbil Erbil44001 Iraq

With the gradual development in industrialization, the advent of computer and information technology has evolved in the field of engineering and construction industry. BIM technology has become a valuable part of prefabricated concrete engineering with the advancement of modern technology based on 3D modeling simulation. In order to realize the industrialization and automation of prefabricated concrete structures, this paper analyzes the characteristics of fabricated concrete structure and BIM, combining the two techniques. This work applies BIM to fabricated concrete design and chooses finite element analysis and calculation software ETABS to analyze the structure model. The results show that the mass participation ratio of the model studied in this paper reaches more than 90%, the interlayer displacement angle is less than 1/550, and the modal and shell internal force analysis results meet the requirements. In this paper, modal analysis, shell internal force analysis under live load and structural dynamic analysis under response spectrum load conditions were carried out on the ETABS model converted from the Revit model and the model directly established by ETABS. The ETABS model converted from the Revit model by the data interface plug-in can be used for structural analysis. © 2023, CAD Solutions, LLC. All rights reserved.

关键词： Finite element method

Experimental and Numerical Study of Stress Diffusion in Artificial Hard Shell Layer Double Foundation of Dredging Silt

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SSRN 2023年

作者： Gao, Shihu Cai, Faxin Zeng, Fangjin Yuan, Guohui Wang, Long College of Architecture and Civil Engineering Wenzhou Polytechnic Chashan University Town Wenzhou325035 China College of Architecture and Civil Engineering Wenzhou University Chashan University Town Wenzhou325035 China The Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province Wenzhou325035 China Innovation Centre of Tideland Reclamation and Ecological Protection Wenzhou University Wenzhou325035 China School of Civil and Surveying&Mapping Engineering Jiangxi University of Science and Technology Jiangxi Ganzhou341000 China The Key Laboratory of Environmental Geotechnical and Engineering Disaster Control of Jiangxi Province Jiangxi Ganzhou341000 China

At present, the selection of stress diffusion Angle (SDA) for Artificial hard shell layer (AHSL) double foundation is controversial, but the stress diffusion theory of Natural hard shell layer (NHSL) double foundation is still used for reference. Based on this, the effects of AHSL thickness h, load width B, AHSL elastic modulus E1, elastic modulus E2 of soft soil layer (SSL) and thickness H on the SDA θ of AHSL double foundation were analyzed through laboratory tests and numerical simulation. The results show that the stress diffusion effect of increasing the thickness and elastic modulus of AHSL is better than that of increasing the load width. The increase of elastic modulus and thickness of SSL is not conducive to stress diffusion of AHSL. SDA decreases gradually with the increase of elastic modulus of SSL, but the thickness of SSL does not affect the change of SDA. The SDA gradually increases to about 30° with the increase of AHSL elastic modulus. The load width is increased so that the SDA is increased from 16.80° to 32.24° and then reduced to 9.85°. Finally, the SDA of AHS was determined to be about 30°. © 2023, The Authors. All rights reserved.

关键词： Elastic moduli

Study on Pore Structure Evolution and Water Damage of Asphalt Mixture Under Cyclic Loading

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SSRN 2024年

作者： Lu, Haifeng Zhang, Kai Zhu, Ruizhi Weng, Lei Zhou, Xinglin Kong, Xiaoxuan Liu, Chongyang Jiang, Yalong School of Civil Engineering Wuhan University Hubei Wuhan430072 China Hubei Key Laboratory of Geotechnical and Structural Engineering Safety Wuhan University Hubei Wuhan430072 China School of Mechanical Automation Wuhan University of Science and Technology Hubei Wuhan430081 China School of Civil Engineering and Architecture East China Jiaotong University Jiangxi Nanchang330013 China

For a long time, the water damage issues of asphalt mixture pavements have been highly regarded by engineers. However, the existing research is difficult to accurately describe the fatigue damage process of asphalt mixture under hydrodynamic pressure environments. In order to reveal the influence of water damage on the asphalt mixture structure and its mechanism, this study combined low-field NMR technology to investigate the evolution law of asphalt mixture pore structure under cyclic loading. We analyzed the erosion effects of the coupled loading-dynamic water environment on asphalt mixtures and their failure *** results show that the initial damage dominated by harmful pores and major-harm pores provides space for water migration and storage, and improves the sensitivity of asphalt mixture to water damage. Under the action of repeated cycles of stress increase-decrease, the irreversible hydrodynamic extrusion-cracking and friction-stripping deformations in the asphalt matrix increase. The micro-cracks inside the materials continue to expand and the pores are interconnected. To comprehensively consider the influence of initial porosity, maximum cyclic stress and the number of cycles, we optimized the cumulative damage model of the material based on the pore structure evolution mechanism, and obtained more accurate porosity prediction results. This study can provide scientific reference and guidance for solving the problem of asphalt pavement disease and durability design. © 2024, The Authors. All rights reserved.

关键词： Pore structure

A Tunable Planar Acoustic Waveguide Based on Non-Uniform Period Thermal Fields

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SSRN 2023年

作者： Zhou, Xiao-Liang Yang, Shuai Li, Jin-Rong Bian, Zu-Guang Shi, Ying-Li China Academy of Space Technology Hangzhou Institute Hangzhou310012 China School of Aeronautics and Astronuatics Zhejiang University Hangzhou310027 China School of Civil Engineering and Architecture Anyang Normal University Anyang455000 China School of Civil Engineering and Architecture Zhejiang University of Science and Technology Hangzhou310023 China Chengdu610054 China

Elastic wave metamaterials, such as phononic crystals (PnCs) always composed of several materials in terms of periodical structures, possess unique acoustic characteristic which can exhibit outstanding performance in forbidding wave propagation with some specific frequencies. In the present paper, due to the thermal sensitivity of thermally induced shape memory polymers (SMP) and period thermal fields, a tunable planar acoustic metamaterial which is constituent homogeneous is proposed and designed to realize the function of waveguides. A thin plate model composed of homogenous thermally induced SMP and adhered with a series of metallic films at the top boundary which plays the role of local heating sources is established. The homogenous plate can be transferred into acoustic metamaterial once the non-uniform period thermal fields is imported. Based on Fourier law of heat conduction and finite element method (FEM), a two-dimensional numerical model via COMSOL Multiphysics is carried out to perform the in-plane mode band structures and transmission spectra. The results show that the band gap will be effectively opened and change obviously as the injected heat flux increases. Furthermore, band structures of 7×1 supercell with thermal defect is performed to reveal the design guideline of waveguides which is supposed to be the basis of line-type and L-type waveguides. The tunable characteristic of waveguides based on thermal fields with thermal defects are also discussed. These results may pave a new avenue for the design of tunable acoustic metamaterial composed of thermal sensitive material which own a prospect to be applied in area of acoustic waveguides. © 2023, The Authors. All rights reserved.

关键词： Energy gap

Research on Intelligent Three-Dimensional Modeling Method Based on Computer Visualization Software: 3Ds MAX and Sketch Up

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Research on Intelligent Three-Dimensional Modeling Method Ba...

Computer science and engineering technology (SCSET), International Seminar on

作者： Yunlong Li Liping Gao Lele Bao Xiaowu Wang School of Art Design Jiangxi Science and Technology Normal University Nanchang China School of Landscape Architecture Nanjing Forestry University Nanjing China School of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang China School of Business Nanchang Hangkong University Nanchang China

In this study, we applied this method to virtual three-dimensional campus construction and compared and analyzed two different three-dimensional software modeling methods: 3DMAX and Sketch Up. By summarizing their respective advantages, we created a complete three-dimensional scene. To achieve basic functions such as vector data recording, three-dimensional browsing, and animation production, we used C# language and AutoCAD and Lumion computer visualization software for secondary development. Experimental results show that the joint modeling method proposed in this study integrates the advantages of 3DsMax and Sketch Up software and combines them with AutoCAD and Lumion computer visualization software, successfully avoiding the problem of format mismatch caused by multi-software modeling. Furthermore, this method shortens the modeling cycle and reduces the difficulty of scene modeling. Therefore, it provides a convenient solution for the rapid construction of large-scale three-dimensional scenes.

关键词：

Noise Pollution Reduction through a Novel Optimization Procedure in Passive Control Methods

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Computer Modeling in engineering & sciences 2022年第4期131卷 1-18页

作者： Haojie Lian Leilei Chen Xiao Lin Wenchang Zhao Stephane P.A.Bordas Mingdong Zhou Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education Taiyuan University of TechnologyTaiyuan030024China Henan International Joint Laboratory of Structural Mechanics and Computational Simulation Huanghuai UniversityZhumadian463000China College of Architecture and Civil Engineering Xinyang Normal UniversityXinyang464000China The York Management School University of YorkYorkYO105DDUK CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of ChinaHefei230027China Institute for Computational Engineering Faculty of ScienceTechnology and CommunicationUniversity of LuxembourgLuxembourgSA28PPUK School of Engineering Cardiff UniversityCardiffCF243AAUK Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China

This paper proposes a novel optimization framework in passive control techniques to reduce noise *** geometries of the structures are represented by Catmull-Clark subdivision surfaces,which are able to build gap-free Computer-Aided Design models and meanwhile tackle the extraordinary points that are commonly encountered in *** acoustic fields are simulated using the isogeometric boundary elementmethod,and a density-based topology optimization is conducted to optimize distribution of sound-absorbing materials adhered to structural *** approach enables one to perform acoustic optimization from Computer-Aided Design models directly without needingmeshing and volume parameterization,thereby avoiding the geometric errors and time-consuming preprocessing steps in conventional simulation and optimization *** effectiveness of the present method is demonstrated by three dimensional numerical examples.

关键词： Noise control topology optimization Catmull-Clark subdivision surfaces isogeometric analysis boundary element methods