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Wind tower based on unexploited industrial chimneys of St. Petersburg

Journal of Physics: Conference Series 2021年第1期1926卷

作者： S E Krasnozhen V S Cherenkov V A Ivanova V V Elistratov Higher School of Hydraulic and Power Engineering Construction Civil Engineering Institute Peter the Great St. Petersburg Polytechnic University. St. Polytechnicheskaya 29 St. Petersburg 194064 Russia Department of Industrial and Civil Construction Institute of Construction and Architecture Moscow State University of Civil Engineering. Yaroslavskoye Shosse 26 Moscow 129337 Russia

Due to the expansion of St. Petersburg from the beginning of the 20th century, the city has formed a Gray Belt of unexploited factories, some of which are architectural heritage. The modern solution to the problem of the Gray Belt is the creation of lofts and public spaces from them, however, it is also practiced transforming former factories into a site for generating 'green energy'. Because of the finiteness of the extracted minerals, the use of renewable resources is the most favourable way of producing electricity. The purpose of this work is to consider the possibility of using an industrial pipe to generate energy on the example: one of the highest unexploited pipes in Grey Belt - a steamshop's chimney (100m), built-in 1955. The result of the study is to determine the inexpediency of using the principle of a wind tube in chimneys in the Gray belt in ***, because, based on the calculations, according to the developed method, the height required for the wind turbine to start moving is 154 m in the summertime in St. Petersburg. During the consideration of the highest pipe in the Leningrad Region (320m), there was concluded that it can provide electricity for 31 people.

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A Study of Sandwich Reinforced Concrete – Foamed Concrete Floor Slabs

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IOP Conference Series: Materials Science and engineering 2021年第3期1203卷

作者： Justyna Sobczak-Piąstka Oksana Lytvyniak Andrii Kramarchuk Borys Ilnytskyy Yuriy Famulyak UTP University of Science and Technology Faculty of Civil and Environmental Engineering and Architecture Al. prof. S. Kaliski street 7 85-796 Bydgoszcz Poland Lviv Polytechnic National University Department of Civil Safety S. Bandera street 12 79013 Lviv Ukraine Lviv Polytechnic National University Department of Building Constructions and Bridges S. Bandera street 12 79013 Lviv Ukraine Lviv National Agrarian University Faculty of Civil Engineering and Architecture 80381 V. Velykoho street Dublyany Zhovkva district Lviv region Ukraine

The development of housing construction demands an application of building materials which ensure necessary functional performance of structures, have high heat-insulating properties, are environmentally friendly and their use is economically appropriate. Simultaneous ensuring of mentioned indices is possible because of complex combined joining of building materials with different physical-mechanical properties. This article presents experimental determination of useful load for sandwich reinforced concrete – foamed concrete floor slabs. Sandwich reinforced concrete – foamed concrete floor slabs are the floor slabs which are composed of normal concrete, non-autoclaved foamed concrete and spatial reinforcement frame. Experimental determination of useful load was carried out on series that compose of four sandwich reinforced concrete – foamed concrete floor slabs. Experimental test of sandwich reinforced concrete – foamed concrete floor slabs was carried out under condition of pure bending that was achieved by applying to floor slab in one third of its span two concentrated forces equal in magnitude. Useful load for sandwich reinforced concrete – foamed concrete floor slabs was 33.23÷77.87 kN/m2. Sandwich reinforced concrete – foamed concrete floor slabs are proposed to be used in construction of housing and social structures.

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Experimental investigations for applying PESS to disaster relief PTHs

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Energy Procedia 2019年 158卷 4772-4777页

作者： Caixia Wang Shiming Deng Xuefeng Liu Guanyu Fang Wenjing Chen Enshen Long Jianlei Niu Department of Building Services Engineering The Hong Kong Polytechnic University Hong Kong SAR China Institute for Disaster Management and Reconstruction Sichuan University Chengdu China School of Electric Power South China University of Technology Guangzhou China School of Architecture Design and Planning and School of Civil Engineering The University of Sydney Australia

In disaster relief reconstructions, the severe indoor thermal environment of the prefabricated temporary house (PTH) limits its massive utilization. Here, the application of phase change material energy storage system (PESS) has been proposed in the full-scale experimental PTH. In the experimental investigations, a movable PESS was designed aiming at regulating the indoor environment of the PTH during the daytime in hot summer, by charging the cool energy during the nighttime. The movable PESS revealed positive impacts on the indoor environment regulation in the experimental PTH. In addition, the distance between the PESS and the west wall also had influences on the cool energy discharging of the PESS and the indoor thermal environment of the experimental PTH.

关键词： disaster-relief prefabricated temporary houses phase change materials summer experiments

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The use of plastic as a household fuel among the urban poor in the Global South

Nature Cities

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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.

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

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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.

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Deformation process of a shocked drop-in-liquid

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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.

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

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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.

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Constitutive relation of stiffened square CFST Columns

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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.

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Tensor-Monopole-Induced Topological Boundary Effects in Four-Dimensional Acoustic Metamaterials

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Physical Review Letters 2025年第18期134卷 186601-186601页

作者： Qingyang Mo Shanjun Liang Cuicui Lu Jie Zhu Shuang Zhang New Cornerstone Science Laboratory Department of Physics University of Hong Kong 999077 Hong Kong China School of Professional Education and Executive Development The Hong Kong Polytechnic University Hong Kong China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems Center for Interdisciplinary Science of Optical Quantum and NEMS Integration School of Physics Beijing Institute of Technology Beijing 100081 China Institute of Acoustics School of Physics Science and Engineering Tongji University 200092 Shanghai China Department of Electrical & Electronic Engineering University of Hong Kong 999077 Hong Kong China Quantum Science Center of Guangdong-Hong Kong-Macao Great Bay Area 3 Binlang Road Shenzhen China Materials Innovation Institute for Life Sciences and Energy (MILES) HKU-SIRI Shenzhen People’s Republic of China

Gauge field theory provides the mathematical and conceptual framework to describe and understand topological singularities such as Weyl points and magnetic monopoles. While singularities associated with vector electromagnetic gauge fields have been well studied, those of higher-form tensor gauge fields, like the four-dimensional (4D) tensor monopoles predicted by string theory, have remained largely theoretical or limited to experimental demonstration in pure synthetic dimensions, thereby not allowing investigations of the associated boundary effects. Here, we present a 4D system with tensor monopoles using engineered acoustic metamaterials. Our momentum space combines three real momentum dimensions and a geometric parameter as the fourth. By varying this fourth momentum, we experimentally reveal two distinct topological surface states in 3D subsystems: Fermi-arc surface states in a gapless subsystem and Dirac-cone surface states in a gapped subsystem. Our work introduces a novel platform for exploring new topological structures associated with tensor gauge field and topological phenomena in higher dimensions.

关键词： Momentum

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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...

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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

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