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Industry effect of job hopping: An agent-based simulation of Chinese construction workers

Jide SUN, Mian ZHENG, Martin SKITMORE, Bo XIA, Xincheng WANG

《工程管理前沿（英文）》 2019年第6卷第2期页码 249-261 doi: 10.1007/s42524-019-0014-4

摘要： Job hopping affects the development of industries in terms of efficiency and quality of work. It is a problem for the Chinese construction industry, where excessive job hopping is detrimental to meeting the current daunting challenges involved in the industry’s transformation and efficiency improvement. To provide an exhaustive analysis of this effect, game theory is combined with social relationship networks to create an agent-based simulation model. Simulation results indicate that the frequent job moves of Chinese construction workers have a negative effect on their skill development, employment, and worker relationships, as well as results in sharp increase in employer labor costs. The findings point to the need to act for the benefit of workers and employers and maintain the development of the industry.

关键词： job hopping agent-based simulation construction industry effect China

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CAS and ABM-based Demolition Waste Management Research in the AEC Industry

Zhi-kun Ding,Yi-fei Wang,Jin-chuang Wu

《工程管理前沿（英文）》 2016年第3卷第1期页码 18-23 doi: 10.15302/J-FEM-2016004

摘要： With the increase of the urban population and the rapid development of urbanization in China, a large number of old buildings will be demolished and produce a huge amount of waste. Currently the recycling ratio of old building materials is very low, which results in the problems of resource waste and environment pollution. This greatly challenges urban sustainable development. With respect to the continual growth of demolition waste quantities, it is urgent to research how to implement effective management of demolition wastes by focusing on the demolition agents’ behavior. Based on the theory of complexity, this paper analyzes the demolition waste management from the perspective of complex adaptive system. Taking into account the “green” demolition (building dismantling) and conventional demolition (building demolished) methods, the agent-based modeling method with Repast Simphony platform is applied to simulate interactions between demolition agents. The longitudinal trend of demolition waste quantities is forecasted.

关键词： demolition waste complexity science agent-based modeling

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区域性医疗集团资源协同仿真建模和政策建议研究

胡依群,苏强,李晓雪,郑静晨

《中国工程科学》 2017年第19卷第2期页码 43-49 doi: 10.15302/J-SSCAE-2017.02.007

摘要：

为了缓解居民“看病难、看病贵”的问题，我们构建了“社区–医院”的二级医疗服务系统概念模型，并建立了患者偏好的函数模型和转诊机制，采用AnyLogic软件对系统进行建模，并以上海市嘉定区为例，通过引入实际案例数据展示了该模型如何用于探讨不同医疗合作模式和医疗改革政策，结果显示，提升基层医疗服务质量以及医保报销比例能够有效提升医疗服务系统的整体效率。

关键词：智能体仿真政策仿真医疗改革患者选择行为

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基于智能体的联网级可再生能源接入模拟及需求响应研究 Artical

David P. Chassin,Sahand Behboodi,Curran Crawford,Ned Djilali

《工程（英文）》 2015年第1卷第4期页码 422-435 doi: 10.15302/J-ENG-2015109

摘要：

本文收集并综合了基于智能体的联网级模型准稳态模拟的技术要求、实施和验证方法，特别关注了可再生发电的接入和可控负荷方面的问题。介绍了已接入可控负荷的建模方法，并将其作为联网规划研究的发电资源置于同一控制与经济建模架构中。本文利用系统参数检验模型的性能，这些参数为联网所用的标准参数，其规模接近西部电力协调委员会(WECC) 规定的规模，控制区域约为系统的1/100。检验结果被用于说明和验证所述的方法。

关键词：联网研究需求响应负荷控制可再生能源接入基于智能体的模拟电力市场

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基于免疫Agent的网格性能抗衰

徐建,张琨,刘凤玉

《中国工程科学》 2007年第9卷第11期页码 87-91

摘要：分析和比较了免疫和抗衰之间的异同，构建了基于免疫Agent的系统抗衰逻辑模型，模拟生物免疫机理对计算网格的资源和性能进行监控和诊断，建立性能衰退的数学模型，并给出了抗衰策略决策方法。

关键词：网格免疫系统性能监控软件抗衰免疫Agent

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基于Agent的军用大型复杂系统建模与仿真

李宏刚,吕辉,刘兴堂

《中国工程科学》 2004年第6卷第8期页码 40-44

摘要：在此背景下，简述了Agent的组成和原理，并对Agent用于军用复杂系统的建模过程进行了深入细致的分析，给出了复杂系统仿真模型和仿真结果，对仿真结果进行了分析。

关键词：复杂系统 Agent 建模与仿真

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多智能体分布式智能控制在VAV空调系统中的应用

张宏伟,吴爱国,盛涛

《中国工程科学》 2006年第8卷第7期页码 58-62

摘要：

针对变风量（VAV）空调系统的特性，将VAV系统分解为多个智能体，提出了基于多智能体技术的分布式智能控制方法，有效地解决了变风量空调系统回路间的解耦和协调问题。建立了VAV系统的动态仿真程序，仿真结果表明该控制方法是有效的。

关键词：变风量智能体多智能体系统分布式智能控制

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Microbial self-healing of cracks in cement-based materials and its influencing factors

《结构与土木工程前沿（英文）》 doi: 10.1007/s11709-023-0986-6

摘要： Cement-based materials are brittle and crack easily under natural conditions. Cracks can reduce service life because the transport of harmful substances can cause corrosion damage to the structures. This review discusses the feasibility of using microbial self-healing agents for crack healing. Tubular and spherical carriers can be used to load microbial self-healing agents and protect microbes, which prolongs the self-healing time. The area self-healing ratio, permeability, mechanical strength, precipitation depth method, numerical modeling, and ultrasonic method can be employed to identify the self-healing effect of cracks. Moreover, the self-healing mechanism is systematically analyzed. The results showed that microbial self-healing agents can repair cracks in cement-based materials in underground projects and dam gates. The difficulties and future development of self-healing cracks were analyzed. A microbial self-healing agent was embedded in the cement-based material, which automatically repaired the developing cracks. With the development of intelligent building materials, self-healing cracks have become the focus of attention.

关键词： cement-based materials cracks microbial self-healing agent mechanism intelligent building materials

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Building information modeling based on intelligent parametric technology

ZENG Xudong, TAN Jie

《结构与土木工程前沿（英文）》 2007年第1卷第3期页码 367-370 doi: 10.1007/s11709-007-0049-4

摘要： In order to push the information organization process of the building industry, promote sustainable architectural design and enhance the competitiveness of China’s building industry, the author studies building information modeling (BIM) based on intelligent parametric modeling technology. Building information modeling is a new technology in the field of computer aided architectural design, which contains not only geometric data, but also the great amount of engineering data throughout the lifecycle of a building. The author also compares BIM technology with two-dimensional CAD technology, and demonstrates the advantages and characteristics of intelligent parametric modeling technology. Building information modeling, which is based on intelligent parametric modeling technology, will certainly replace traditional computer aided architectural design and become the new driving force to push forward China s building industry in this information age.

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湖南省公众科学素养趋势预测与对策研究

金士尧,叶超群,吴集,黄红兵

《中国工程科学》 2006年第8卷第10期页码 54-59

摘要：

湖南公众科学素养趋势预测和对策研究是通过复杂系统仿真来实现的。复杂系统仿真是现代科学预测和对策研究的重要工具。通过实例介绍了复杂系统仿真的全过程，包括建模、演化、预测和外部事件刺激影响等。并提出了有效的对策措施。

关键词：复杂系统仿真多Agent建模与仿真科学素养

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基于元胞自动机的多自主体人员行为模型及其在性能化设计中的应用

方伟峰,杨立中,黄锐

《中国工程科学》 2003年第5卷第3期页码 67-71

摘要：

目前性能化设计规范一个最主要的特点是从强调财产保护转变到强调生命安全保护，因此对建筑物内人员行为特征和运动规律的研究正越来越受到人们的重视。元胞自动机模型在交通流研究中的应用已经开展多年并取得了很多有用的成果，但涉及人的行为特征的研究往往十分复杂，在这方面利用自主体来研究具有较大的优势。给出的模型结合了这两方面各自的优势，是在元胞自动机交通流、行人流基本框架上建立起的多自主体人员行为模型，它对评估建筑物的设计方案具有很好的参考作用。

关键词：元胞自动机模型多自主体人员行为性能化设计

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An investigation on prevalent strategies for XFEM-based numerical modeling of crack growth in porous

《结构与土木工程前沿（英文）》 2021年第15卷第4期页码 914-936 doi: 10.1007/s11709-021-0750-8

摘要： Crack growth modeling has always been one of the major challenges in fracture mechanics. Among all numerical methods, the extended finite element method (XFEM) has recently attracted much attention due to its ability to estimate the discontinuous deformation field. However, XFEM modeling does not directly lead to reliable results, and choosing a strategy of implementation is inevitable, especially in porous media. In this study, two prevalent XFEM strategies are evaluated: a) applying reduced Young’s modulus to pores and b) using different partitions to the model and enriching each part individually. We mention the advantages and limitations of each strategy via both analytical and experimental validations. Finally, the crack growth is modeled in a natural porous media (Fontainebleau sandstone). Our investigations proved that although both strategies can identically predict the stress distribution in the sample, the first strategy simulates only the initial crack propagation, while the second strategy could model multiple cracks growths. Both strategies are reliable and highly accurate in calculating the stress intensity factor, but the second strategy can compute a more reliable reaction force. Experimental tests showed that the second strategy is a more accurate strategy in predicting the preferred crack growth path and determining the maximum strength of the sample.

关键词： numerical modeling extended finite element method porous media crack growth stress intensity factor

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Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive

Qingsheng YANG, Fang XU

《机械工程前沿（英文）》 2009年第4卷第3期页码 284-288 doi: 10.1007/s11465-009-0067-0

摘要： Fiber reinforced polymer (FRP) composites exhibit nonlinear and hyperelastic characteristics under finite deformation. This paper investigates the macroscopic hyperelastic behavior of fiber reinforced polymer composites using a micromechanical model and finite deformation theory based on the hyperelastic constitutive law. The local stress and deformation of a representative volume element are calculated by the nonlinear finite element method. Then, an averaging procedure is used to find the homogenized stress and strain, and the macroscopic stress-strain curves are obtained. Numerical examples are given to demonstrate hyperelastic behavior and deformation of the composites, and the effects of the distribution pattern of fibers are also investigated to model the mechanical behavior of FRP composites.

关键词： composites hyperelastic finite deformation homogenization micromechanics

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Operando modeling and measurements: Powerful tools for revealing the mechanism of alkali carbonate-based

《能源前沿（英文）》 2023年第17卷第3期页码 380-389 doi: 10.1007/s11708-023-0872-x

摘要： Alkali carbonate-based sorbents (ACSs), including Na₂CO₃- and K₂CO₃-based sorbents, are promising for CO₂ capture. However, the complex sorbent components and operation conditions lead to the versatile kinetics of CO₂ sorption on these sorbents. This paper proposed that operando modeling and measurements are powerful tools to understand the mechanism of sorbents in real operating conditions, facilitating the sorbent development, reactor design, and operation parameter optimization. It reviewed the theoretical simulation achievements during the development of ACSs. It elucidated the findings obtained by utilizing density functional theory (DFT) calculations, ab initio molecular dynamics (AIMD) simulations, and classical molecular dynamics (CMD) simulations as well. The hygroscopicity of sorbent and the humidity of gas flow are crucial to shifting the carbonation reaction from the gas−solid mode to the gas−liquid mode, boosting the kinetics. Moreover, it briefly introduced a machine learning (ML) approach as a promising method to aid sorbent design. Furthermore, it demonstrated a conceptual compact operando measurement system in order to understand the behavior of ACSs in the real operation process. The proposed measurement system includes a micro fluidized-bed (MFB) reactor for kinetic analysis, a multi-camera sub-system for 3D particle movement tracking, and a combined Raman and IR sub-system for solid/gas components and temperature monitoring. It is believed that this system is useful to evaluate the real-time sorbent performance, validating the theoretical prediction and promoting the industrial scale-up of ACSs for CO₂ capture.

关键词： CO₂ capture carbonation theoretical modeling operando techniques reaction visualization

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Organizational dynamics in adaptive distributed search processes: effects on performance and the role of complexity

Friederike WALL

《信息与电子工程前沿（英文）》 2016年第17卷第4期页码 283-295 doi: 10.1631/FITEE.1500306

摘要： In this paper, the effects of altering the organizational setting of distributed adaptive search processes in the course of search are investigated. We put particular emphasis on the complexity of interactions between partial search problems assigned to search agents. Employing an agent-based simulation based on the framework of NK landscapes we analyze different temporal change modes of the organizational set-up. The organizational properties under change include, for example, the coordination mechanisms among search agents. Results suggest that inducing organizational dynamics has the potential to increase the effectiveness of distributed adaptive search processes with respect to various performance measures like the final performance achieved at the end of the search, the chance to find the optimal solution of the search problem, or the average performance per period achieved during the search process. However, results also indicate that the mode of temporal change in conjunction with the complexity of the search problem considerably affects the order of magnitude of these beneficial effects. In particular, results suggest that organizational dynamics induces a shift towards more exploration, i.e., discovery of new areas in the fitness landscape, and less exploitation, i.e., stepwise improvement.

关键词： Agent-based simulation Complexity Coordination Distributed search NK landscapes