检索结果-内蒙古大学图书馆

Nature Cities 2025年 1-7页

作者： Bishal Bharadwaj Pramesh Dhungana Peta Ashworth Tara Gates Monjit Borthakur Sobia Rose Chizoba Obianuju Oranu Ayşe Lisa Allison Yacob Mulugetta Jessika Bohlmann Darcy E. Glenn Marc Jeuland Joseph Awange Ian Gates Curtin Institute for Energy Transition Curtin University Perth Western Australia Australia School of Molecular and Life Sciences Curtin University Perth Western Australia Australia School of Architecture Planning and Landscape University of Calgary Calgary Alberta Canada Cotton University Guwahati India Pakistan Institute of Development Economics (PIDE) Islamabad Pakistan University of Nigeria Nsukka Enugu Nigeria UCL Plastic Waste Innovation Hub and UCL Centre for Behaviour Change University College London London UK Department of Science Technology Engineering and Public Policy University College London London UK Department of Economics University of Pretoria Pretoria South Africa University of Canterbury Christchurch New Zealand Sanford School of Public Policy and Duke Global Health Institute Duke University Durham NC USA Land Surveying and Geo-Informatics (LSGI) The Hong Kong Polytechnic University Hung Hom Hong Kong Department of Chemical and Petroleum Engineering University of Calgary Calgary Alberta Canada

Increasing plastic waste pollution has led to a rising prevalence of the open burning of plastic waste, especially in locations lacking formal waste-management systems. Urban slum communities face particularly acute challenges in accessing both organized waste-collection services and low-cost traditional energy sources, and clean cooking-fuel alternatives tend to be unaffordable for their low-income residents. Here we examine the potential risk these unseen communities face and describe the need for a new research agenda to better understand and quantify the scope of the problem. The Global South is urbanizing at a rapid rate. Moreover, in many countries, this urbanization is outpacing the expansion of amenities and economic opportunities. With global plastic use predicted to triple by 2060 and two-thirds of the global population estimated to be living in urban areas by 2050, this Perspective draws attention to the nexus of sanitation and energy poverty, and the potential problems it poses for many low-income urban dwellers. An increasing number of energy-poor households, surrounded by plentiful waste plastic, are believed to be burning waste to both meet their energy needs and manage waste, although the evidence is limited and far from representative. We discuss the factors that may push marginalized households in cities of the Global South to burn waste plastic, and why this possibility is so concerning, before closing with a call for applied research to better understand the scale and scope of the phenomenon and its consequences.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Axial compressive behaviour of double steel-concrete shear wall constrained with ribs and bars

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期643卷

作者： ZHENG Xinzhi ZHENG Shuang SUN Yutao Ecological Architecture and Environment Construction Henan Province Engineering Laboratory Henan Polytechnic University Jiaozuo 454000 Henan China College of Civil Engineering Henan Polytechnic University Jiaozuo 454000 Henan China Guangdong Tianwei Construction Co. LTD Guangzhou 510310 Guangdong China School of Civil Engineering Tsinghua University Beijing 100004 Beijing China Department of Architectural Engineering Tianjin University Renai College Tianjin 301636 Tianjin China Shanyang District Housing and Urban-Rural Development Bureau Jiaozuo 454150 Henan China

The double steel-concrete shear wall combines the advantages of steel and concrete effectively, with high bearing capacity, good plasticity, superior seismic and fire resistance performance, saving materials and simple construction, and has obvious advantages in the application of high-rise buildings, especially super high-rise buildings. Research on axial compressive behavior of double steel-concrete shear wall constrained with ribs and bars is less. In this paper, the constitutive relation of double steel-concrete column with ribs and bars is used to change the relevant parameters and program to analyze the influence of ribs and bars on the axial compression performance of double steel-concrete shear wall.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Eccentric compressive behaviour of double steel-concrete shear wall constrained with ribs and bars

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期643卷

作者： ZHENG Xinzhi ZHENG Shuang LI Songbiao Ecological Architecture and Environment Construction Henan Province Engineering Laboratory Henan Polytechnic University Jiaozuo 454000 Henan China College of Civil Engineering Henan Polytechnic University Jiaozuo 454000 Henan China Guangdong Tianwei Construction Co. LTD Guangzhou 510310 Guangdong China School of Civil Engineering Tsinghua University Beijing 100004 Beijing China Department of Architectural Engineering Tianjin University Renai College Tianjin 301636 Tianjin China Shanyang District Housing and Urban-Rural Development Bureau Jiaozuo 454150 Henan China

By adding ribs and bars to form the double steel-concrete shear wall constrained with ribs and bars, the steel plate of the whole steel-concrete shear wall can be strengthened of the constraint. The research on Eccentric compressive behavior of double steel-concrete shear wall constrained with rib and bar is less, this paper analyzes double steel plate concrete shear wall by using larger length-width rectangular CFST column research methods. Based on the constitutive relation of the rectangular CFST column with ribs and bars, the relative parameters are changed, and a program is written to compare and analyze eccentric compressive behavior of double steel-concrete shear wall constrained with ribs and bars compared with that double steel plate concrete shear wall only constrained with bars.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Deformation process of a shocked drop-in-liquid

引用

中国科学（物理学力学天文学） 2018年第10期61卷 92-95页

作者： Bin Liao GuiFu Zhang YuJian Zhu ZhuFei Li ErQiang Li JiMing Yang Department of Modern Mechanics University of Science and Technology of China Hefei 230027 China College of Architecture and Civil Engineering Anhui Polytechnic University Wuhu 241000 China Department of Modern Mechanics University of Science and Technology of China Hefei 230027 China

A mixed flow of two immiscible liquids may form drops of one liquid in the *** and breakup of drops occur when there is sufficient hydrodynamic or surface forces from the ambient liquid;such deformation and breakup of drops is a common phenomenon in various engineering applications,such as oil-water flow in the petroleum recovery industry [1,2],stirred dispersions in the chemical industry [3,4],and melted metal and cooling liquid interactions in the nuclear industry [5,6].A typical simplified model for the mechanism study is the behaviours of a single drop against its surrounding liquid.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Constitutive relation of stiffened square CFST Columns

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期643卷

作者： ZHENG Xinzhi ZHENG Shuang ZHANG Yuanhong Ecological Architecture and Environment Construction Henan Province Engineering Laboratory Henan Polytechnic University Jiaozuo 454000 Henan China College of Civil Engineering Henan Polytechnic University Jiaozuo 454000 Henan China Guangdong Tianwei Construction Co. LTD Guangzhou 510310 Guangdong China School of Civil Engineering Tsinghua University Beijing 100004 Beijing China Department of Architectural Engineering Tianjin University Renai College Tianjin 301636 Tianjin China Shanyang District Housing and Urban-Rural Development Bureau Jiaozuo 454150 Henan China

Using the constitutive model of a square CFST column with binding bars, the constrained mechanism of the stiffened square CFST columns is analyzed in great detail. The equivalent constitutive model under uniaxial compression is established for square CFST columns. The model is then used to describe the stress-strain curve process for concrete and to calculate the bearing capacity. Models of ten concrete-filled square steel tubular columns under axial compression specimens are created with constitutive relation. The results are compared with the axial compression test of an ordinary square CFST specimen column and stiffened square CFST specimens. Our results show that the bearing capacity and stress-strain curves under axial compression are consistent with the actual test measurements. Analysis can be applied to the square stiffened CFST columns, the square CFST columns with binding bars, and the ordinary square CFST columns.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A neuro-dynamic programming approach for perimeter control of two urban regions with macroscopic fundamental diagrams

A neuro-dynamic programming approach for perimeter control o...

引用

International Conference on Intelligent Transportation

作者： Z.C. SU Andy H.F. CHOW N. ZHENG Y.P. HUANG R.X. ZHONG Department of Architecture and Civil Engineering City University of Hong Kong Hong Kong SAR China Department of Civil Engineering Monash University Melbourne Australia Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hong Kong SAR China Guangdong Key Laboratory of Intelligent Transportation Systems school of Systems Engineering Sun Yat-sen University Guangzhou China

Macroscopic Fundamental Diagram (MFD) model is widely used to describe urban traffic dynamic system. Based on the MFD model, perimeter control methods are developed to ensure the efficiency of the system. However, most existing perimeter control methods would suffer from two shortcomings, i.e., linearization of the MFD function, accurate calibration of MFD and travel demand. These prerequisites would undermine the performance of the system if an accurate calibration cannot be guaranteed. On the other hand, an optimization scheme of network performance without excessive knowledge of state variables but based on traffic data is preferable. In this study, an optimal feedback controller based on the neuro-dynamic that approximates the solution of the Hamilton-Jacobi-Bellman equation (HJB) is introduced. Firstly, the value function is approximated by a neural network. Then the parameters are optimized by the policy iteration method, with the objective of minimizing the cumulative error toward set-point. Furthermore, the optimal control law constrained by a saturated operator is implemented based on real-time observations recursively. The neuro-dynamic controller is tested for the two-regional MFD system. The results confirm that the neuro-dynamic controller can regulate the traffic states converge to the desired uncongested equilibrium.

关键词： Optimal control Vehicle dynamics Mathematical model Nonlinear dynamical systems Cost function Biological neural networks Programming

来源：评论

学校读者我要写书评

暂无评论

Influence of different knowledge levels on the seismic retrofit cost assessment of a RC school building

引用

AIP Conference Proceedings 2020年第1期2293卷

作者： Andrea Miano Giovanni Chiumiento Antonio Formisano Andrea Prota 1Department of Structures for Engineering and Architecture School of Polytechnic and Basic Sciences University of Naples “Federico II” Via Claudio 21 80125 Naples Italy

The retrofit of existing structures in high seismic zones is one of the most challenging issue in the Earthquake engineering field. A reinforced concrete (RC) school building is used as case study to show the influence of different knowledge levels on the seismic retrofitting cost assessment. The vulnerability evaluation of the mentioned building highlights deficiencies under both static and seismic loads. By considering all the possible knowledge levels defined by the Italian code in order to derive the mechanical properties of the school building constitutive materials, various retrofit options are designed to achieve different seismic safety thresholds. The retrofit structural costs are calculated and summed up to the costs for in-situ tests. The paper shows how for the case study building the major costs spent for a large number of in-situ tests allow to save a consistent amount of money for retrofit operations.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Holistic methodology for lifecycle energy consumption of heritage buildings

引用

Journal of Physics: Conference Series 2021年第1期1900卷

作者： A Al-Sakkaf E M Abdelkader S El-Zahab A Bagchi T Zayed Dept. of Architecture & Environmental Planning College of Engineering & Petroleum Hadhramout University Mukalla Yemen Dept. of Building Civil and Environmental Engineering Concordia University Montreal Canada Structural Engineering Department Faculty of Engineering Cairo University Egypt Dept. of Engineering Management University of Balamand Kalhat El Koura Lebanon Dept. of Building and Real Estate (BRE) The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong

Heritage buildings are historically exceptional in their landscape and specific attention must be paid to their architectural element and components. Recently, the techniques that are utilized for the study and protection of cultural heritage have been on the rise in the research field. Studies have shown that project life cycle phases can be implemented to determine the performance of a given building in general. However, heritage buildings and their need were not considered. The project life cycle phases include: 1) planning, 2) manufacturing, 3) transportation, 4) construction, 5) operation and 6) maintenance phases. In addition, there is a need for an encompassing rating system that is capable of determining the most optimal pathway for rehabilitating heritage buildings. Hence, this article aims to present a comprehensive life cycle energy analysis model that optimizes expenditure over all building components by optimizing the budget. Furthermore, as a proof of concept, two case studies are applied in this research-GN in Canada and MP in the KSA.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Case Study of Modern Heritage Building: Base Isolation Seismic Retrofit for Preservation of its Architectural Distinguishing Features

引用

IOP Conference Series: Materials Science and engineering 2020年第3期960卷

作者： Gloria Terenzi Elena Fuso Stefano Sorace Iacopo Costoli Department of Civil and Environmental Engineering University of Florence Via S. Marta 3 50139 Florence Italy Polytechnic Department of Engineering and Architecture University of Udine Via delle Scienze 206 33100 Udine Italy

Several Italian buildings designed by eminent architects and structural engineers in the second half of the 20th century are now included in modern heritage listings. At the same time, as they were designed before the issue of coordinate national Technical Standards, often require important structural rehabilitation interventions. One of the most representative case studies of that period in Florence, i.e. the building now housing the Automobile Club Headquarter and a B&B Hotel, is examined in this paper. A seismic assessment analysis carried out on the structure highlighted strength deficiencies in several members and potentially severe pounding conditions between the two constituting wings of the building, separated by a narrow technical gap. In order to improve the seismic performance without altering the architectural appearance of the building, characterized by large windows in the façades, free internal spaces and elegant proportions of the main structural members, a base isolation retrofit hypothesis is proposed. A substantial seismic improvement is obtained in rehabilitated conditions, as assessed by the achievement of safe stress states for all members up to the basic design normative earthquake level, as well as of maximum relative lateral displacements of the two wings constrained below the technical gap width.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Direct Visualization of Atomic Structure in Multivariate Metal-Organic Frameworks (MOFs) for Guiding Electrocatalysts Design

引用

Angewandte Chemie 2022年第4期135卷

作者： Prof. Dr. Dengrong Sun Lok Wing Wong Hok Yin Wong Ka Hei Lai Dr. Lin Ye Xinyao Xv Prof. Dr. Thuc Hue Ly Prof. Dr. Qingming Deng Prof. Dr. Jiong Zhao Department of Applied Physics The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China College of Architecture and Environment National Engineering Research Centre for Flue Gas Desulfurization Carbon Neutral Technology Innovation Center of Sichuan Sichuan University Chengdu 610065 China Physics Department and Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials Huaiyin Normal University Huaian 223300 China Department of Chemistry and Center of Super-Diamond and Advanced Films (COSDAF) City University of Hong Kong Kowloon Hong Kong China

The direct utilization of metal–organic frameworks (MOFs) for electrocatalytic oxygen evolution reaction (OER) has attracted increasing interests. Herein, we employ the low-dose integrated differential phase contrast-scanning transmission electron microscopy (iDPC-STEM) technique to visualize the atomic structure of multivariate MOFs (MTV-MOFs) for guiding the structural design of bulk MOFs for efficient OER. The iDPC-STEM images revealed that incorporating Fe 3+ or 2-aminoterephthalate (ATA) into Ni-BDC (BDC: benzenedicarboxylate) can introduce inhomogeneous lattice strain that weaken the coordination bonds, which can be selectively cleaved via a mild heat treatment to simultaneously generate coordinatively unsaturated metal sites, conductive Ni@C and hierarchical porous structure. Thus, excellent OER activity with current densities of 10 and 100 mA cm −2 are achieved over the defective MOFs at small overpotentials of 286 mV and 365 mV, respectively, which is superior to the commercial RuO 2 catalyst and most of the bulk MOFs.

关键词： Defect engineering Metal–Organic Frameworks Multivariate MOFs Oxygen Evolution Reaction iDPC-STEM

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：