检索结果-内蒙古大学图书馆

Objective Εvaluations Based on Urban Soundscape in Waterfront Recreation Spaces 13th

Objective Εvaluations Based on Urban Soundscape in Waterfro...

13th International Conference on Cross-Cultural Design, CCD 2021, Held as Part of the 23rd HCI International Conference, HCII 2021

作者： Lin, Wei Wu, Yi-Ming Zhang, Hui-Zhong Lin, Hsuan School of Architecture Feng Chia University Taichung Taiwan Program for Civil Engineering Water Resources Engineering and Infrastructure Planning Feng Chia University Taichung Taiwan Department of Product Design Tainan University of Technology Tainan Taiwan

ISBN: (纸本)9783030770792

Space and form play an important role in the current geometry of recreational space and cognition of sound field. Therefore, there is different objective physical quantity information of sound energy. These concerned sounds are related to urban development and historical and cultural characteristics and will be highly recognizable sounds. It can be seen from the above that in urban recreational streets, through the objective physical characteristics of the street sound field sorted out, the positive evaluation can be predictably given, and the correspondence between the subjective feelings of the people will be explored. If the physical quantity of sound energy discusses the homogeneity of normalization of the soundscape and comprehensive physical quantity information, it is afraid to ignore the characteristics of spatial qualitative and internal variability. The currently research results propose the urban soundscape acoustic environment factors of waterfront recreation spaces, confirm and draw distinctive sound energy distribution maps and sound field perception. Understand the public’s sensitivity and preference for sound, and explore the correlation and consistency of measurement and computer simulation correspondence. © 2021, Springer Nature Switzerland AG.

关键词： Acoustic fields

来源：评论

学校读者我要写书评

暂无评论

Influence of Recycled Glass on Strength Development of Alkali-Activated High-Calcium Fly Ash Mortar

引用

Advances in Materials Science and engineering 2023年第1期2023卷

作者： Damrongwiriyanupap, Nattapong Wongchairattana, Sangsan Phoo-Ngernkham, Tanakorn Petcherdchoo, Aruz Limkatanyu, Suchart Chindaprasirt, Prinya Civil Engineering Program School of Engineering University of Phayao Mae Ka Phayao56000 Thailand Sustainable Construction Material Technology Research Unit Department of Civil Engineering Faculty of Engineering and Technology Rajamangala University of Technology Isan Nakhon Ratchasima30000 Thailand Department of Civil Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok10800 Thailand Department of Civil Engineering Faculty of Engineering Prince of Songkla University Hat Yai Songkla90112 Thailand Sustainable Infrastructure Research and Development Center Department of Civil Engineering Faculty of Engineering Khon Kaen University Khon Kaen40002 Thailand Academy of Science The Royal Society of Thailand Dusit Bangkok10300 Thailand

This article presents the development of green and sustainable mortars using alkali-activated high-calcium fly ash (AAFA) and recycled glass (RG) as part of the fine aggregate. RG was used to replace river sand at dosages of 0%, 25%, 50%, 75%, and 100% by weight. Sodium hydroxide (SH) and sodium silicate (SS) solutions were used as liquid alkaline activators in all mixtures. The AAFA samples were prepared with different liquid-to-binder ratios of 0.6 and 0.7, and the ratio of SS-to-SH was fixed at 2.0. Compressive and flexural strengths were determined at the ages of 7, 28, and 60 days. Test results showed that the compressive and flexural strengths of AAFA mortars declined as RG replacement increased;nevertheless, they increased with curing time. The high Na2O concentration derived from RG and the weak interfacial transition zone of RG are reasons for the decrease in strength development. The optimum percentage replacement of fine aggregates with RG was found at 25%. The 28-day compressive strength of AAFA with 25% RG was 32.5 MPa for L/B ratios of 0.6 and 29.5 MPa for L/B ratios of 0.7, which resulted in a strength index higher than 75% while releasing low CO2. © 2023 Nattapong Damrongwiriyanupap et al.

关键词： Mortar

来源：评论

学校读者我要写书评

暂无评论

Optimization of Printing Parameters for Printing of Ordinary Portland Cement using a Custom-made 3D Printer 21

Optimization of Printing Parameters for Printing of Ordinary...

引用

21st International Union of Materials Research Societies International Conference in Asia, IUMRS-ICA 2021

作者： Chaiyotha, D. Pinitsoontorn, S. Chindaprasirt, P. Payakaniti, P. Materials Science and Nanotechnology Program Department of Physics Faculty of Science Khon Kaen University Khon Kaen40002 Thailand NANOTEC -KKU RNN on Nanomaterials Research and Innovation for Energy Khon Kaen University Khon Kaen40002 Thailand Sustainable Infrastructure Research and Development Center Department of Civil Engineering Faculty of Engineering Khon Kaen University Khon Kaen40002 Thailand

3D printing techniques have recently received a lot of attention as a new technique for forming construction materials, due to benefits over the traditional cast. In this research, ordinary Portland cement (OPC) paste was formed using a 3D extruder. Optimized mixture and printing parameters were determined. Compressive strengths of the printed and the traditionally casted OPC paste were measured after the specimens were cured in saturated limewater for 7, 14 and 28 days, respectively. The result led to the conclusion that the most suitable mixture for printing was achieved at the water to cement ratio of 0.35 with water reducing and retarding admixture added. The optimum printing parameters were the printing speed of 60 mm/min and the feed rate of 120 ml/s. Compressive strength of the 5 x 5 x 5 cm3 hollowed and filled cubic printed specimens, were compared with casted cement paste. The strengths of both the printed and the casted specimens were higher with longer curing durations. The highest levels of strength were achieved at 12.36 MPa on the printed specimens and 80.88 MPa when testing the casted samples. © Published under licence by IOP Publishing Ltd.

关键词： 3D printers

来源：评论

学校读者我要写书评

暂无评论

Analysis of Farm Pond Detention and Disaster Prevention Potential and Activation Improvement Strategy

引用

Journal of Chinese Soil and Water Conservation 2022年第2期53卷 124-138页

作者： Lin, Shu-Hao Jang, Je-Yi Ph.D. Program for Civil Engineering Water Resources Engineering and Infrastructure Planning Feng Chia University Taichung Taiwan Water and Soil Conservation Bureau Conservation Management Team Reservoir Conservation Division Nantou Taiwan

Given the increasing rate of climate change in recent years, this study investigated the flood detention capacity of traditional farm ponds. The HEC-HMS model was used to evaluate the farm ponds in the water catchment areas of Neili, Lunshan, Dapo, and the Anyexi and Chaoyong Rivers. The investigation also cooperated with detailed survey operations to screen 76 farm ponds for flood detention potential and to estimate their inflow. The peak reduction rate in the 50-year return period was determined to be 83%, and the peak delay time was determined to be 27%. The peak reduction rate has increased significantly, indicating that farm ponds offer considerable potential for flood detention and disaster prevention. They can be regarded as a possible solution for the general dispersal of flood runoff and for reducing the impact of future natural disasters. © 2022 Chinese Soil and Water Conservation Society. All rights reserved.

关键词： Farm ponds Flow hydrograph Peak attenuation

来源：评论

学校读者我要写书评

暂无评论

Gender Mainstreaming in Drought Disaster Risk Reduction 2

Gender Mainstreaming in Drought Disaster Risk Reduction

引用

2nd International Conference on Sciences and Technology Applications, ICOSTA 2020

作者： Retno Susilorini, Rr M. I. Lika, Rusnianti Rambu Sriyana Angghita, Lintang Jata Sinaga, Julio Ignatius Department of Infrastructure and Environmental Engineering Faculty of Environmental Science and Technology Soegijapranata Catholic University Semarang Indonesia Master Program of Environmental and Urban Studies Faculty of Environmental Science and Technology Soegijapranata Catholic University Semarang Indonesia Department of Civil Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Climate change has affected the whole world and caused disasters, include drought. Since Tana Mbanas village in Central Sumba District is the driest remote area in eastern region of Indonesia, gender inequality has affected in daily life of people in the village instead of other social and environmental problems. This research aimed to evaluate how gender mainstreaming implemented in drought disaster risk reduction in Tana Mbanas village in Central Sumba Regency, East Nusa Tenggara Province. The result of the research is expected to become a mirror that reflects Sumba island gender and development issues. The research took place in Tana Mbanas village in Central Sumba Regency, East Nusa Tenggara Province, and conducted by qualitative method with purposive data sampling. The steps taken in the research were observation, data collecting by questionnaire and in-depth interview to respondents, and literature review. It was reported that Tana Mbanas village people has given water management assistance by village fund, conducting water management counselling, saving water, and harvesting rain systems in every household. This research meets conclusions that: (1) Several programs and planned actions in water supply system and infrastructure development have become initiatives of government agencies of village authorities, BPBD and Public Work Agency of Central Sumba Regency;(2) People demonstrated vulnerability to drought as well as lack of water supply and also water resources;(3) Strong efforts should be conducted to educate people and increase women capacity in coping issues of poverty, drought, and lack of water supply;and (4) Government agencies and other private institutions have to build women capacity as their participation in enhancing gender equality and mainstreaming gender. © Published under licence by IOP Publishing Ltd.

关键词： Water management

来源：评论

学校读者我要写书评

暂无评论

Upgradation of 2D applied element method (AEM) for soil-structure interaction (SSI)

Progress in Engineering Science

引用

Progress in engineering Science 2025年第2期2卷

作者： Hossain, Md Shakhawat Timsina, Kishor Gadagamma, Chaitanya Krishna Numada, Muneyoshi Kamal, ASM Maksud Meguro, Kimiro Department of Disaster Science and Climate Resilience University of Dhaka Dhaka Bangladesh Institute of Industrial Science the University of Tokyo Tokyo Japan Sustainable and Resilient Infrastructure Program Madan Bhandari University of Science and Technology Nepal Structural Engineering School of Engineering and Technology Asian Institute of Technology Thailand Department of Civil Engineering Chennai Institute of Technology India

The applied element method (AEM) can comprehensively analyze structural behavior from initial loading to complete collapse with simple material models. However, AEM research predominantly centers on structures, with limited exploration in the soil-structure interaction (SSI) context. Therefore, in this paper, essential upgrades have been integrated into AEM to analyze SSI effects. These upgrades include boundary conditions, damping, material models, and failure criteria. Boundary conditions, including Free-H (Horizontal) with viscous damping boundaries, are crucial to analyzing the SSI effect. Rayleigh damping is employed to capture the dynamic response of the structure-soil system. The choice of material model is pivotal;the Hardin-Drnevich (HD) model is used to characterize soil behavior. Mohr Column failure criteria are integrated to predict soil failure. After incorporating these improvements, a verification process is conducted, including verification for fixed-based structures, boundary conditions, soil site response analysis, and the SSI. The results of the verification process ensure the model's ability to analyze SSI effectively. © 2025 Elsevier B.V.

关键词： Applied element method (AEM) Soil-structure interaction (SSI)

来源：评论

学校读者我要写书评

暂无评论

Transforming disposable masks to sustainable gasoline-like fuel via pyrolysis

引用

Environmental Advances 2024年 15卷

作者： Sari, Mega Mutiara Inoue, Takanobu Salsabilla, Vionna Chantika Septiariva, Iva Yenis Mulyana, Rahmad Prayogo, Wisnu Arifianingsih, Nur Novilina Suhardono, Sapta Suryawan, I. Wayan Koko Department of Environmental Engineering Faculty of Infrastructure Planning Universitas Pertamina Jakarta 12220 Indonesia Department of Architecture and Civil Engineering Toyohashi University of Technology Aichi Toyohashi 441-8580 Japan Civil Engineering Study Program Faculty of Engineering Universitas Sebelas Maret Jl. Ir. Sutami 36A Surakarta 57126 Indonesia Department of Civil Engineering Faculty of Engineering Universitas Negeri Medan North Sumatra Medan Indonesia Department of Environmental Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Bandung 40116 Indonesia Department of Environmental Science Universitas Sebelas Maret. Central Java Surakarta Indonesia

The past COVID-19 pandemic has led to a surge in the use of disposable masks, posing a significant environmental challenge due to the swift accumulation of waste. This study explores the potential of pyrolysis to transform this waste into valuable pyrolysis oil with characteristics akin to gasoline, addressing both waste management and energy derivation concerns. Pyrolysis, a thermal decomposition process, was applied to mask materials, producing an oil with a high calorific value of 45.93 MJ/kg. The chemical makeup of this pyrolytic oil was meticulously characterized using Pyrolysis-Gas Chromatography-Mass Spectrometry (PY-GC/MS) and Fourier-transform Infrared Spectroscopy (FTIR), confirming the presence of hydrocarbons similar to those found in gasoline. Achieving an efficiency of 41.865 %, the pyrolytic approach demonstrated a promising potential for not only managing mask waste but also creating an alternative energy carrier. However, the study advises that before considering this pyrolytic oil for engine use, a thorough evaluation of its combustion quality, engine compatibility, and environmental impact is essential. This investigation advances the discussion on sustainable waste management, offering insights into the generation of alternative fuels from daily waste streams, while also highlighting the necessity for comprehensive analyses to ensure the practicality and efficiency of such novel energy solutions. © 2023 The Author(s)

关键词： Alternative fuel sources Disposable masks Energy recovery techniques Medical waste valorization Thermochemical conversion

来源：评论

学校读者我要写书评

暂无评论

Dem Simulation on the Damage of Sandstone with a Rough Fracture Under True-Triaxial Stress Conditions

SSRN

引用

SSRN 2024年

作者： Zhang, Decheng Liu, Zhiwei Song, Yuqi Huang, Jicheng Wu, Bailin Ranjith, P.G. Perera, M.S.A. Kong, Lie Nie, Wen School of Civil and Transportation Engineering Hebei University of Technology Tianjin China Deep Earth Energy Laboratory Department of Civil Engineering Monash University VIC3800 Australia Jiangsu Leiwei Construction Engineering Co. Ltd. China Railway Shanghai Bureau Group Nanjing210003 China Energy Resources Research Program CSIRO Energy ClaytonVIC3168 Australia Department of Infrastructure Engineering University of Melbourne VIC3010 Australia James Watt School of Engineering University of Glasgow GlasgowG12 8QQ United Kingdom

A numerical study was conducted on the damage behaviors of sandstone specimens with an embedded rough fracture under triaxial stress conditions. The discrete element method was used to study the deformation and cracking characteristics, and the effects of triaxial stress state, fracture width and inclination angle on the mechanical properties were also investigated. The results are as follows: (1) The strength of fractured rock decreased with the increase of fracture width ratio and the yield stress under conventional triaxial stress is higher than those under true triaxial tests with the same mean confinement;(2) For fractured rock models with small width ratios (0.2, 0.4 and 0.6), the strength increases as the fracture angle turning towards the principal stress direction. The shear damaged bond ratio decreased with the increase of confining pressure when [[EQUATION]], while its ratio increased slightly with the fracture angle when[[EQUATION]];(3) For the large-width fractured rock model with a width ratio 1.0, the strength first decreased and then increased with the increasing inclination angle. At inclination angles of 0° and 30°, damage first occurred near fracture surface, then it propagated along the diagonal direction, and the ratios of bond damage caused by tension and shear failure were almost equal. While the shear damaged bond ratio was much higher than that by tension at inclination angles of 60° and 90°. © 2024, The Authors. All rights reserved.

关键词： Sandstone

来源：评论

学校读者我要写书评

暂无评论

Innovations in Pavement Design and engineering: A 2023 Sustainability Review

SSRN

引用

SSRN 2024年

作者： Styer, Jaime Tunstall, Lori Landis, Amy E. Grenfell, James Department of Engineering Design and Society Humanitarian Engineering and Science Program Colorado School of Mines 1500 Illinois St GoldenCO80401 United States Department of Civil and Environmental Engineering Colorado School of Mines 1500 Illinois St GoldenCO80401 United States Sustainable Infrastructure Materials Australian Road Research Board 80a Turner Street Port MelbourneVIC3207 Australia

Transportation infrastructure is essential to a nation's everyday life and economic activity. Accordingly, pavement design and engineering are imperative to ensure safe, comfortable, and efficient transportation of goods, services, and people across countries. Pavements should be designed to be adaptable to changing traffic inputs and environmental conditions and always strive to fulfill the requirements of the end-users, including safety, durability, comfort, efficiency, sustainability, and cost. This review highlights innovations in paving technologies with a focus on sustainability from a socio-technical perspective;the scope is meant to be comprehensive but not exhaustive. The discussion categorizes paving design and technology innovations into two high-level sections: 1) high-volume urban pavement innovations and 2) low-volume rural pavement innovations. © 2024, The Authors. All rights reserved.

关键词： Sustainable development

来源：评论

学校读者我要写书评

暂无评论

Experimental and numerical characterization of EPS using elastoplastic response in ABAQUS

引用

Materials Today: Proceedings 2023年

作者： Yasser M. Mater Aya M. El Shahat Sherif S. AbdelSalam Civil Infrastructure Engineering and Management Program School of Engineering and Applied Science Nile University Giza 12588 Egypt

Expanded polystyrene (EPS) is an attractive research area in the field of construction engineering. Its ultra-lightweight properties, high compressibility , and environmental-friendly characteristics make it ideal for the use as a compressible backfilling material for embankments, a filling material behind retaining walls and many other applications. Consequently, the compressive strength is one of the important properties for engineers. To this end, this paper aims to create a simplified elastoplastic model for the uniaxial unconfined compressive behavior of EPS. The developed model can predict the plastic stress–strain behavior of EPS using only its elastic modulus . A mathematical curve fitting model was developed by testing several 50 × 50 × 50 mm cube specimens under the test setup of a 50 kN uniaxial loading machine. Then, the proposed model was validated through the elastoplastic behavior in ABAQUS, by creating a finite element model for the described test setup. It was found that the proposed experimental test setup resulted in reasonable stress–strain behavior for EPS, similar to that indicated in the literature. Also, the presented mathematical model can accurately predict the stress–strain behavior of EPS, which was validated using the elastoplastic response in ABAQUS.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：