检索结果-内蒙古大学图书馆

158th Meeting Acoustical Society of America 2009

作者： Wang, Lily M. Lau, Siu-Kit Architectural Engineering Program University of Nebraska - Lincoln 101A Peter Kiewit Institute Omaha NE 68182-0681 United States

architectural engineering (AE) is a discipline of study that is only currently available at 17 schools across the United States, and even fewer of these AE programs include acoustics as a main option in their curricula. This presentation will review the Nebraska Acoustics Group, housed within the AE program at the University of Nebraska which began in 1998. Students may study acoustics within any of our five engineering degree programs (BSAE, MAE, MEng, MS and PhD). Currently there are two AE faculty out of 11 who focus in acoustics at Nebraska, and the program regularly offers at least six recurring acoustics courses. Descriptions of the acoustics courses, the research interests of the Nebraska Acoustics Group, and where our graduates are to date will be given. Specifically highlighted will be the theme of our acoustics group: to promote the advancement and science of architectural acoustics by closely tying our coursework and research to practice in the 'real-world'. © 2010 Acoustical Society of America.

关键词： Teaching

来源：评论

学校读者我要写书评

暂无评论

Studying architectural acoustics through the University of Nebraska's architectural engineering program

引用

Proceedings of Meetings on Acoustics 2009年第1期8卷

作者： Lily M. Wang Siu-Kit Lau Architectural Engineering Program University of Nebraska - Lincoln 101A Peter Kiewit Institute Omaha NE 68182-0681 Architectural Engineering Program University of Nebraska - Lincoln 203C Peter Kiewit Institute Omaha NE 68182-0681

关键词：

来源：评论

学校读者我要写书评

暂无评论

Experimental Investigation for a Novel Bio-Inspired Scour Countermeasure

Experimental Investigation for a Novel Bio-Inspired Scour Co...

引用

Geotechnical Frontiers 2025: Geotechnics of Natural Hazards

作者： Castillo, Rodolfo Kulesza, Stacey Rhode-Barbarigos, Landolf Civil Engineering Program Texas State Univ. San MarcosTX United States Dept. of Civil Architectural and Environmental Engineering Univ. of Miami MiamiFL United States

ISBN: (数字)9780784485996

Bridge scour poses a persistent threat to infrastructure durability, necessitating the development of novel, eco-friendly solutions to complement traditional protection methods. One potential solution developed at the University of Miami is SEAHIVE, a system of hexagonal hollow concrete prisms with perforations on each face. SEAHIVE elements have been used as a sustainable estuarine and marine revetment to mitigate wave energy along seawalls emulating beehives. SEAHIVE elements also provide habitat for displaced ecosystems, such as hybrid coral reefs and mangrove tree planters. In this study, we describe the experimental setup and results to evaluate the ability of SEAHIVE elements in reducing local scour at bridge piers. Specifically, this study evaluated the local scour development around three configurations of a SEAHIVE monopile compared to a circular monopile through scaled physical testing in the Texas State University flume. By quantifying the equilibrium scour depth and the volume of the scour hole around SEAHIVE monopiles, the research contributes valuable insights into the use of SEAHIVE for scouring protection and the ability of novel sustainable and eco-friendly solutions in enhancing infrastructure durability. © ASCE.

关键词： Bridge piers

来源：评论

学校读者我要写书评

暂无评论

Approach to Enhancing Panoramic Segmentation in Indoor Construction Sites Based on a Perspective Image Segmentation Foundation Model

引用

Applied Sciences (Switzerland) 2025年第9期15卷 4875-4875页

作者： Han, Juho Yoon, Sebeen Kang, Mingyun Kim, Taehoon Department of Architecture and Architectural Engineering Yonsei University Seoul03722 Korea Republic of Architectural Engineering Program School of Architecture Seoul National University of Science and Technology Seoul01811 Korea Republic of

Panoramic images in indoor construction sites are gaining attention as valuable tools for process monitoring and quality assessment. However, despite the environmental complexity and the demand for high segmentation performance in indoor construction environments, the scarcity of specialized segmentation models and datasets has created a gap between technological advancements and practical application, thus hindering the effective utilization of panoramic images. To address these challenges, this study proposes a novel approach leveraging the Segment Anything Model (SAM), a perspective image segmentation foundation model, to enhance the performance of existing segmentation models. The proposed method iteratively executes SAM with adjusted input parameters to extract objects of varying sizes and subsequently applies filtering algorithms to retain valid objects. Then, label assignment and merging processes are performed based on the predictions from the target model to improve segmentation accuracy. The experimental study was conducted using Panoplane360, a model specifically designed for plane segmentation, as the target model. A quantitative evaluation was conducted to measure the exactness of label assignment, and two qualitative evaluations were performed to assess whether the assigned labels accurately represent the actual planar information. The evaluation results confirmed that the proposed method significantly improves segmentation performance compared to conventional approaches. The findings of this study highlight the potential of SAM-based methods to enhance segmentation accuracy in dynamic indoor construction environments. Furthermore, the proposed approach provides practical advantages, as it improves segmentation performance without requiring the construction of additional datasets. Future research will focus on resolving computational efficiency issues resulting from iterative SAM execution and will extend the applicability of the proposed approach to d

关键词： Image segmentation

来源：评论

学校读者我要写书评

暂无评论

Zero Thermal Expansion Metamaterial Designs for Space Structures

Zero Thermal Expansion Metamaterial Designs for Space Struct...

引用

AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Lu, Wei-Chun Oudghiri-Idrissi, Othman Poli, Andrea Arruda, Ellen M. Tol, Serife Department of Mechanical Engineering University of Michigan 2350 Hayward St Ann ArborMI48109 United States Fariborz Maseeh Department of Civil Architectural and Environmental Engineering The University of Texas at Austin 301 E. Dean Keeton St AustinTX78712 United States Department of Mechanical Engineering Macromolecular Science and Engineering Program University of Michigan 2350 Hayward St Ann ArborMI48109 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The precision of space structures is sensitive to high-temperature variation during on-orbit operations. This work develops zero thermal expansion (ZTE) metamaterials that can be integrated into space structures to restrict large thermal deformation under precision requirements. The proposed bi-material ZTE metamaterial beams show extremely low coefficients of thermal expansion (CTE) for a wide temperature variation. Static and dynamic analyses are conducted on the designed metamaterials for performance evaluation. The proposed ZTE beam elements are integrated into a 48-meter rib of a space RF antenna to enhance its thermal precision over a wide temperature range. Further, experimental validation of the ZTE truss beam design is conducted in a thermal chamber to demonstrate its low thermal deformation compared to a reference aluminum truss beam. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Trusses

来源：评论

学校读者我要写书评

暂无评论

Characterization of Ureolysis and Microbially Induced Calcium Carbonate Precipitation Under Different Incubation and Reaction Conditions

SSRN

引用

SSRN 2025年

作者： Joo, Hyun-Woo Fyfe, Matthew H. Verdú, Irene Rahmaninezhad, Seyed Ali Sales, Christopher M. Srubar, Wil V. Hubler, Mija H. Department of Civil Environmental and Architectural Engineering University of Colorado Boulder BoulderCO United States Department of Civil Architectural and Environmental Engineering Drexel University PhiladelphiaPA United States Environmental Department Terracon Consulting Inc. The ColonyTX United States Department of Civil Environmental and Architectural Engineering Materials Science and Engineering Program University of Colorado Boulder BoulderCO United States Department of Biology

This study investigates the ureolysis and microbially induced calcium carbonate precipitation (MICP) characteristics of Sporosarcina pasteurii and Lysinibacillus sphaericus under varying incubation and reaction conditions. A series of batch MICP experiments were conducted to assess the effects of incubation duration and pH, bacterial cell density, and reagent (i.e., urea and calcium ion) concentrations on ureolysis and CaCO3 precipitation characteristics. The findings indicate that both bacteria exhibit higher urease activity after 24 hours of incubation compared to 48 hours, regardless of incubation pH. S. pasteurii exhibits maximum specific urease activity at an alkaline pH (pH 9.0), whereas L. sphaericus reaches peak activity at a neutral pH (pH 7.2). Across six incubation conditions for each bacterium, S. pasteurii exhibits greater sensitivity in specific urease activity, while L. sphaericus maintains a more consistent ureolysis performance. In terms of cell density, a lower OD600 (~0.1) enhances specific urease activity and early-stage mineralization efficiency, whereas a higher OD600 (~1.0) accelerates overall CaCO3 precipitation, enhances terminal-stage mineralization efficiency, and promotes the prolonged presence of vaterite. High reagent concentrations (1.0 and 1.5 M) enhance specific urease activity and CaCO3 precipitation rates and lead to over 93% of vaterite formation, while low reagent concentration (0.3 M) favors calcite-dominant precipitation over time. These findings provide insights into evaluating and optimizing MICP performance under varying incubation and reaction conditions. © 2025, The Authors. All rights reserved.

关键词： Carbonation

来源：评论

学校读者我要写书评

暂无评论

Characterization of Ureolysis and Microbially Induced Calcium Carbonate Precipitation Under Different Incubation and Reaction Conditions

SSRN

引用

SSRN 2025年

作者： Joo, Hyun-Woo Fyfe, Matthew H. Verdú, Irene Rahmaninezhad, Seyed Ali Sales, Christopher M. Srubar, Wil V. Hubler, Mija H. Department of Civil Environmental and Architectural Engineering University of Colorado Boulder BoulderCO United States 1111 Engineering Drive – UCB 428 ECOT 441 BoulderCO80309-0422 United States Department of Civil Architectural and Environmental Engineering Drexel University PhiladelphiaPA United States Environmental Department Terracon Consulting Inc. The ColonyTX United States Department of Civil Environmental and Architectural Engineering Materials Science and Engineering Program University of Colorado Boulder BoulderCO United States Department of Biology

关键词： Carbonation

来源：评论

学校读者我要写书评

暂无评论

Nucleation effects of coccoliths in portland cement

引用

Matter 2025年

作者： Beatty, Danielle N. Srubar, Wil V. Materials Science and Engineering Program University of Colorado Boulder 4001 Discovery Drive UCB 027 BoulderCO80303 United States Department of Civil Environmental and Architectural Engineering University of Colorado Boulder 1111 Engineering Drive ECOT 441 UCB 428 BoulderCO80309 United States

This work explores the use of photosynthesized coccoliths (intricate CaCO3 particles) as a nucleation agent or cement replacement in portland cement paste. First, coccoliths were produced and harvested from the marine microalgae Emiliania huxleyi and the particle size, morphology, and mineralogy were characterized. Then, the nucleation effects of E. huxleyi coccoliths as seeding agent (0.5, 1, 3, or 5 wt % additions) and limestone filler (5 and 15 wt % cement replacements) were studied using isothermal conduction calorimetry and compressive strength testing. The results were compared with five commercially available CaCO3 sources used as nucleation agents and fillers. While the high surface area of coccoliths (12.22 m2/g) enhanced water demand, it also enhanced nucleation during cement hydration without accelerating hydration, leading to enhanced early-age strength without detriments to 28-day strength. Results highlight a potential carbon reduction strategy, namely employing photosynthesis as a method of mineral admixture production, for the cement and concrete industry. © 2025 Elsevier Inc.

关键词： Portland cement

来源：评论

学校读者我要写书评

暂无评论

Scenario Generation for Built Environment Decision Support under Uncertainty: Case Studies of Airflow Modeling and Climate-Resilient Infrastructure System Design

引用

Journal of Computing in Civil engineering 2025年第4期39卷

作者： Luo, Linchao Cheng, Chih-Shen Mobley, William Novoselac, Atila Lieberknecht, Katherine Leite, Fernanda Civil Engineering and Project Management Program Dept. of Civil Architectural Environmental Engineering Univ. of Texas at Austin AustinTX78712 United States Texas Advanced Computing Center Univ. of Texas at Austin AustinTX78712 United States Robert and Francis Stark Centennial Fellowship in Engineering Dept. of Civil Architectural Environmental Engineering Univ. of Texas at Austin AustinTX78712 United States School of Architecture Univ. of Texas at Austin AustinTX78712 United States Cockrell School of Engineering Joe J. King in Civil Architectural Environmental Engineering Univ. of Texas at Austin AustinTX78712 United States

When confronted with unforeseen challenges, practicing informed decision making is crucial for enhancing resilience in the built environment. While scan-to-building information modeling (BIM) is a well-established approach for creating detailed digital representations of physical assets, its application in assessing and improving infrastructure resilience remains underexplored. This study addresses this gap by proposing a novel application of scan-to-BIM, namely, scan-to-BIM-to-digital twin (S-BIM-DT) workflow. By integrating reality capture and digital twin technologies, this workflow creates continuously updated and accurate digital representations of physical assets, enabling the generation of various scenarios. Unlike traditional methods, the S-BIM-DT workflow facilitates continuous model refinement, supporting informed resilience strategies. By combining these technologies into a cohesive process, the workflow facilitates decision making under uncertainty, enabling stakeholders to evaluate and respond to various scenarios effectively. We demonstrate the implementation of the S-BIM-DT workflow through two use cases that highlight its capability to enhance resilience at different scales. The first use case involves the Combined Transportation, Emergency, and Communications Center (CTECC) in Austin, Texas. BIM-enriched computational fluid dynamics (CFD) modeling simulates airflow and develops alternative scenarios for optimizing the heating, ventilation, and air conditioning (HVAC) systems. This approach enhances resilience against airborne health threats in a postCOVID context. The second use case focuses on designated areas within Beaumont, Texas, as part of the Southeast Texas Urban Integrated Field Laboratory (SETx-UIFL) research. By developing inundation maps to assess extreme weather events, this modeling aids in preparedness efforts and informs the development of climate-resilient infrastructure in vulnerable neighborhoods. Results indicate that the S-BIM-D

关键词： Binary codes

来源：评论

学校读者我要写书评

暂无评论

A SIMPLIFIED ANALYTICAL METHOD TO EVALUATE THE EFFECTS OF ROOF SPRAY EVAPORATIVE COOLING

引用

ENERGY CONVERSION AND MANAGEMENT 1993年第1期34卷 7-16页

作者： KONDEPUDI, SN Architectural Engineering Program Civil and Architectural Engineering Drexel University Philadelphia PA 19104 U.S.A.

A simplified mathematical technique is presented with which preliminary evaluation of the effects of roof spray evaporative cooling can be made. This method incorporates the effects of solar flux, ambient temperature and the humidity of the environment and is much simpler to implement than previously suggested models. The use of the model is illustrated via the use of TMY weather data for Washington, D.C., and the trends predicted are found to be consistent with that in the literature.

关键词： ANALYTICAL EVAPORATIVE COOLING MATHEMATICAL MODEL ROOF SPRAY WEATHER

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：