检索结果-内蒙古大学图书馆

Nonlinear vibration analysis of fluid-conveying cantilever graphene platelet reinforced pipe

STEEL AND COMPOSITE STRUCTURES 2024年第2期50卷 201-216页

作者： Ali, Bashar Mahmood Akkas, Mehmet Hancerliogullari, Aybaba Bohlooli, Nasrin Kastamonu Univ Grad Sch Nat & Appl Sci Mat Sci & Engn PhD Program TR-37150 Kastamonu Turkiye Kastamonu Univ Fac Engn & Architecture Dept Mech Engn TR-37150 Kastamonu Turkiye Kastamonu Univ Fac Sci Dept Phys TR-37150 Kuzeykent Kastamonu Turkiye Urmia Univ Sch Civil Engn Orumiyeh Iran

This paper is motivated by the lack of studies relating to vibration and nonlinear resonance of fluid -conveying cantilever porous GPLR pipes with fractional viscoelastic model resting on nonlinear foundations. A dynamical model of cantilever porous Graphene Platelet Reinforced (GPLR) pipes conveying fluid and resting on nonlinear foundation is proposed, and the vibration, natural frequencies and primary resonant of such system are explored. The pipe body is considered to be composed of GPLR viscoelastic polymeric pipe with porosity in which Halpin -Tsai scheme in conjunction with fractional viscoelastic model is used to govern the construction relation of the nanocomposite pipe. Three different porosity distributions through the pipe thickness are introduced. The harmonic concentrated force is also applied on pipe and excitation frequency is close to the first natural frequency. The governing equation for transverse motion of the pipe is derived by the Hamilton principle and then discretized by the Galerkin procedure. In order to obtain the frequency -response equation, the differential equation is solved with the assumption of small displacement, damping coefficient, and excitation amplitude by the multiple scale method. A parametric sensitivity analysis is carried out to reveal the influence of different parameters, such as nanocomposite pipe properties, fluid velocity and nonlinear viscoelastic foundation coefficients, on the primary resonance and linear natural frequency. Results indicate that the GPLs weight fraction porosity coefficient, fractional derivative order and the retardation time have substantial influences on the dynamic response of the system.

关键词： cantilever pipe fluid-conveying fractional viscoelastic model GPLs reinforced nonlinear foundation primary resonance

来源：评论

学校读者我要写书评

暂无评论

Local emergency management agencies' hurricane evacuation decision making and population warning

引用

INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION 2025年 124卷

作者： Qiu, Qianli Lindell, Michael K. Yeates, Elissa Lyons, Jessica Chen, Chen Oklahoma State Univ Fire & Emergency Management Program Stillwater OK 74078 USA Texas A&M Univ Dept Landscape Architecture & Urban Planning College Stn TX USA US Army Corps Engineers Coastal & Hydraul Lab Vicksburg MS USA US Army Corps Engineers Construct Engn Res Lab Champaign IL USA

Recent decades have seen a substantial amount of research on households' decisions about whether and when to evacuate from approaching hurricanes. Although this research has shown that an official evacuation warning is one of the consistently strongest predictors of household evacuation, there has been little research on the process by which state and local officials decide whether and when to issue such warnings. This study surveyed Local Emergency Management Agencies (LEMAs) on the Gulf and Atlantic coasts to assess their sources of information about approaching hurricanes, the processes by which they decide to issue official evacuation warnings, and the channels through which they issue official evacuation warnings to their jurisdictions. In addition, the questionnaire addressed whether LEMAs have templates for their evacuation warning messages and, if so, what are the elements of those templates, what percentage of the risk area population they expect to receive an official evacuation warning within 1 hour, and their perceptions of informal warning networks. The results showed that LEMAs access many sources of information about approaching hurricanes, consider many criteria when deciding to issue official evacuation warnings, and follow a variety of different organizational processes when making those decisions. In addition, many LEMAs use templates to construct evacuation warnings, issue those warnings through various channels, and expect a majority of the risk area population to receive an official evacuation warning within 1 hour. Finally, they have both positive and negative perceptions of informal warning networks but, overall, consider them to be somewhat or mostly helpful.

关键词： Hurricane evacuation warnings Local emergency management agencies Emergency assessment Informal warning networks

来源：评论

学校读者我要写书评

暂无评论

Testing methods and design specifications for FRP-prestressed concrete members: A review of current practices and case studies

引用

JOURNAL OF BUILDING ENGINEERING 2023年 73卷

作者： Rafieizonooz, Mahdi Kim, Jang-Ho Jay Varaee, Hesam Nam, Yeonwoo Khankhaje, Elnaz Yonsei Univ Sch Civil & Environm Engn Yonsei Ro 50 Seoul 03722 South Korea Ale Taha Inst Higher Educ Dept Engn Tehran Iran Seoul Natl Univ Sci & Technol Sch Architecture Architectural Engn Program 232 Gongneung Ro Seoul 01811 South Korea

Fiber-reinforced polymers (FRP) have been developed as replacement materials for steel bars and tendons in concrete structural members for decades. These materials offer corrosion resistance, perfect durability, and high strength capacity, and therefore can be utilized as the main reinforcements to strengthen reinforced concrete (RC) members. Recently, several studies have focused on investigating the properties of pre-stressed FRP and steel-reinforced concrete structural members. Considering the rapid growth of the use of FRP in the construction industry and the development of various types of tendons, it is necessary to have a comprehensive review article that systematically addresses this development. This review focuses on the engineering properties and durability performance of concrete structures prestressed with FRP. It also discusses the regular FRP composite materials, their features, properties, and applications. Despite some disadvantages and negative effects of utilizing FRP tendons as effective alternatives for steel tendons, such as additional cost, lack of composite materials, and complicated production process, there are still advantages and benefits of utilizing FRP tendons in the construction industry.

关键词： FRP Reinforced concrete Engineering Properties Durability

来源：评论

学校读者我要写书评

暂无评论

The Word Processing of Watergate and the Metaphysics of Information

引用

GREY ROOM 2021年第84期84卷 112-132页

作者： Spencer, Chelsea MIT Hist Theory & Criticism Architecture & Art Program Cambridge MA 02139 USA

Spencer pursues an evolving imaginary of information as it emerged over the course of Watergate, a political scandal that fixated on information collection and processing in terms of volume in the US. Examining the information techniques used by paramilitary bureaucrats and paralegal investigators in their attempts to manage a "flood" of information, it asks how Americans in the early 1970s--politicians, lawyers/bureaucrats, and librarians, but also artists and public intellectuals--grappled physically and conceptually with the practical and ethical implications of "automation" in the so-called information age. In the age of Watergate, this work of processing was no less metaphysical than it was technical, for as a force called "information" took on imaginative substance and diluvian properties, new beliefs and anxieties cohered around the sublimity of its apparent boundlessness and the urgency of its evident need to be managed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Beyond Distinction-Based Narratives. Interior Design's Educational History as a Knowledge Base

引用

JOURNAL OF INTERIOR DESIGN 2021年第4期46卷 13-25页

作者： Vanhee, Sam Vandevoort, Benoit Flore, Fredie De Vos, Els Univ Antwerp Antwerp Belgium Katholieke Univ Leuven Fac Architecture Leuven Belgium Univ Antwerp Interior Architecture Program Antwerp Belgium

In this article, we look into different texts treating the history of education of interior design. Ever since the interior design discipline has started to seek connection with academia, research on its past has become a negotiation scene for a shared understanding of the discipline, its roots, and its current practice. Academic discourse is characterized by a need to counter perceptions that have pestered the discipline in the past, and have hindered its process toward professionalization. By scanning through the body of theory that has been produced in the past two decades, we search for content that acknowledges the value of historical education and its contribution to a debate on the discipline's identity. After contextualizing this specific kind of research, we not only try to find common ground between different texts that each focus on a specific time period, school, or country, but also aim to unveil the position taken by an author when constructing such a history. All authors showcase a need to use their text as a confirmation of disciplinary distinction-an aspect heavily perpetuated throughout discourse on interior design's identity. To conclude, we propose a different perspective on educational history that transcends a distinction-based narrative by postulating interior design's educational history as a strategy to produce new knowledge.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CREATING AND USING MASK IMAGES FOR SEGMENTATION IN POINT CLOUD DATA 24

CREATING AND USING MASK IMAGES FOR SEGMENTATION IN POINT CLO...

引用

24th ISPRS Congress on Imaging Today, Foreseeing Tomorrow

作者： Ozturk, Berkay Ozkar, Mine Istanbul Tech Univ Dept Informat Grad Sch Architectural Design Comp Program Istanbul Turkey Istanbul Tech Univ Dept Architecture Istanbul Turkey

The task of preparing the training data for machine learning is tedious but crucial for accurate results. Aiming at labelling meaningful features semi-automatically rather than manually in order to reduce time, we hereby present initial results for two cases of 13th century Seljuk brick-ornamentation. As our broader research involves machine learning methods for the segmentation of digital survey data for creating meaningful three-dimensional models, the primary goal here is to determine the parts of the patterns from the whole composition and to use this data for different buildings of the genre. Prior to any machine learning, labelling the data of either a whole pattern or pieces of a pattern is a time-consuming task prone to errors. We propose a semi-automated mask generating model for labelling. In order to create the black and white mask images of the original photographs, we utilise the colour difference between the pattern parts. Examined samples have at least three visually distinguishable colours that are turquoise, black and natural. We use photogrammetry-based survey data and image processing to create attributed point clouds and eventually 3D digital models. Using the ready batch processing of a commercial software, we create a distinct mask and apply it to all images of the photogrammetry process. Point cloud data is then created with RAW images, and the generated masks are used to filter desired patterns. As such, we are able to easily label the bricks in the point cloud towards a machine learning training set.

关键词： Architectural Heritage Real-World Data Analysis Photogrammetry

来源：评论

学校读者我要写书评

暂无评论

All lives matter. An analysis of internationals' living conditions in Seoul, Korea, using an extended image-satisfaction-loyalty mechanism

引用

GROWTH AND CHANGE 2023年第3期54卷 652-673页

作者： Gim, Tae-Hyoung Tommy Seoul Natl Univ Grad Sch Environm Studies Interdisciplinary Program Landscape Architecture Seoul South Korea Seoul Natl Univ Environm Planning Inst Seoul South Korea Seoul Natl Univ Grad Sch Environm Studies Interdisciplinary Program Landscape Architecture Gwanak Ro 1Bldg 82Room 222 Seoul 08826 South Korea Seoul Natl Univ Environm Planning Inst Gwanak Ro 1Bldg 82Room 222 Seoul 08826 South Korea

We indirectly analyze the residential environment for long-staying internationals in Seoul, Korea, by extending the image-satisfaction-loyalty mechanism widely used in tourism, specifically by examining the internationals' satisfaction and loyalty. We consider residential difficulties, sociodemographics, and survey years along with image as exogenous variables and evaluate satisfaction not only in terms of its absolute but also its relative level, which is the difference between absolute satisfaction (AS) and previous expectation. Tourism studies have measured loyalty using individuals' intention to recommend to another and their own revisit intention, but we evaluate the revisit intention with place attachment/hometown perception, which is more suitable for long-staying residents. The variables are measured with 2016-2018 data from an annual quality of life survey for Seoul residents (n = 5279 individuals) and analyzed with structural equation modeling. Our results show that the conventionally used AS is associated only with recommendation intention, but the relative satisfaction (RS) both with recommendation intention and hometown perception. Regarding the exogenous variables, AS is substantially affected by image and RS is somewhat strongly influenced by residential difficulties. However, image is the principal determinant of loyalty level, whether recommendation intention or hometown perception. These findings confirm the applicability of the image-satisfaction-loyalty mechanism not only to short-staying inbound tourists but also to long-staying international residents.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Multi-objective planning of micro-grid system considering renewable energy and hydrogen storage systems with demand response

引用

International Journal of Hydrogen Energy 2023年第41期48卷 15626-15645页

作者： Zhu, J.R. Jin, Yihua Zhu, Weihong Lee, Dong-Kun Bohlooli, Navid Interdisciplinary Program in Landscape Architecture Seoul National University South Korea College of Agriculture Yanbian University JiLin China College of Geography and Ocean Sciences Yanbian University JiLin China Department of Landscape Architecture and Rural System Engineering Seoul National University Seoul South Korea Electrical Engineering Department Sun-Life Company Baku Seoul Azerbaijan

Recently, researchers in the power system industry have considered the intelligent parking lot idea. The intelligent parking lots (IPL) try to exchange power with the upstream by electric vehicles (EVs) charge/discharge application. The mentioned process of charge/discharge can provide a solution model of regular problems in this field, i.e., peak time problems. Additionally, such vehicles' existence can play an essential role in environmental performance enhancement in power systems. The primary purpose of this paper is to consider such enhancements of EVs in power systems and environmental performance. For this purpose, a multi-objective optimization approach is suggested for the environmental performance and economical operation of IPL by considering the time-of-use rates of a demand response program. Since such a model is associated with various practical bounds, the multi-objective grasshopper optimization algorithm is suggested to solve this problem. The outcomes indicate the effectiveness of the compared techniques utilizing fuzzy decision-making strategies. Chaos theory is employed to increase this method and progress searching operators. Additionally, the proposed multi-objective technique is a model created using fuzzy theory, variable detection, strategy selection-based memory, and non-dominated sorting theory to choose the best Pareto from a list of solutions with robust functionality for resolving the problems mentioned above. The proposed technique is tested on a sample system that includes an intelligent parking lot, local production facilities, and non-renewable and renewable production systems under the proposed uncertainty strategy of upstream grid pricing. The study showed the effectiveness of the suggested method. The simulation findings indicate that the emission rate and overall cost of intelligent parking lots are reduced by 3.87 and 2%. It indicates that economic and environmental objectives are also satisfied due to the successful deployment

关键词： Demand side management Grasshopper optimization algorithm Intelligent parking lot Multi-objective optimization

来源：评论

学校读者我要写书评

暂无评论

Towards a new rural and urban intersection, "R-Urban": the Beykoz district case in Istanbul

引用

ARCHNET-IJAR INTERNATIONAL JOURNAL OF ARCHITECTURAL RESEARCH 2024年

作者： Turgut, Hulya Keskin, Ozge Girgin, Dilara Ozyegin Univ Dept Architecture UHL Urban & Housing Res Lab Istanbul Turkiye Ozyegin Univ City & Architecture Masters Program UHL Urban & Housing Res Lab Istanbul Turkiye Ozyegin Univ City & Architecture Masters Program Istanbul Turkiye

PurposeUrbanization is among current global challenges along with climate change, population growth and depletion of natural resources. Rural areas have been transformed due to urbanization pressures, which leads to a change in the relationship between rural and urban spaces, blurring the boundaries between rural and urban areas. Due to the lack of a clear distinction, a new form of rural-urban relationship has emerged. The convergence and even disappearance of borders has paved the way for a rural-urban dichotomy and re-questioning the relationship between cities and nature. In the case of Istanbul, this transformation, especially since 1980, has been reshaping rural-urban relations. Thus, the present article aimed to rethink this new pattern described as "R-Urban", a hybrid intersection as a field of ***/methodology/approachR-Urban creates an ambiguous and dynamic hybrid space where urban and rural operate within flexible and layered spatial boundaries. In the article, initially, a conceptual framework is presented based on the analysis of existing conceptual framework of rural-urban relationships, with transactional and dialectical perspectives. Secondly, fieldwork was investigated with representational tools such as mapping, photography and collages to determine the current status based on quantitative and qualitative data. Then, the rural-urban situation of Istanbul was conceptualized, with a focus on Beykoz neighborhood, a peripheral development with blurred rural and urban ***, as an R-Urban space, has a significant potential regenerating the relations between nature, humans and space and production to practices to ensure ecological resilience. The article demonstrated that the coexistence of different lifestyles paved the way for cultural diversity and the development of social relations. This diversity allowed innovative and sustainable practices while increasing social cooperation and solidarity in the *** impl

关键词： R-Urban Rural-urban intersection Rural-urban interface Re-generating the city

来源：评论

学校读者我要写书评

暂无评论

Harnessing novel cytidine deaminases from the animal kingdom for robust multiplexed base editing in rice

引用

PLANT BIOTECHNOLOGY JOURNAL 2025年第5期23卷 1702-1712页

作者： Contiliani, Danyel Fernandes Sretenovic, Simon Dailey, Micah Zhou, Man Cheng, Yanhao Creste, Silvana Xiao, Shunyuan Qi, Yiping Univ Maryland Dept Plant Sci & Landscape Architecture College Pk MD 20742 USA Univ Sao Paulo Ribeirao Preto Med Sch Grad Program Genet Ribeirao Preto SP Brazil Agron Inst IAC Sugarcane Ctr Ribeirao Preto SP Brazil Univ Maryland Inst Biosci & Biotechnol Res Rockville MD 20850 USA

CRISPR-Cas-based cytosine base editors (CBEs) are prominent tools that perform site-specific and precise C-to-T conversions catalysed by cytidine deaminases. However, their use is often constrained by stringent editing preferences for genomic contexts, off-target effects and restricted editing windows. To expand the repertoire of CBEs, we systematically screened 66 novel cytidine deaminases sourced from various organisms, predominantly from the animal kingdom and benchmarked them in rice protoplasts using the nCas9-BE3 configuration. After selecting candidates in rice protoplasts and further validation in transgenic rice lines, we unveiled a few cytidine deaminases exhibiting high editing efficiencies and wide editing windows. CBEs based on these cytidine deaminases also displayed minimal frequencies of indels and C-to-R (R = A/G) conversions, suggesting high purity in C-to-T base editing. Furthermore, we highlight the highly efficient cytidine deaminase OoA3GX2 derived from Orca (killer whale) for its comparable activity across GC/CC/TC/AC sites, thus broadening the targeting scope of CBEs for robust multiplexed base editing. Finally, the whole-genome sequencing analyses revealed very few sgRNA-dependent and -independent off-target effects in independent T0 lines. This study expands the cytosine base-editing toolkit with many cytidine deaminases sourced from mammals, providing better-performing CBEs that can be further leveraged for sophisticated genome engineering strategies in rice and likely in other plant species.

关键词： CRISPR-Cas novel cytidine deaminases cytosine base editor off-target analysis rice

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：