多目标模糊优选在地铁施工方案选择中的应用

地铁施工方案对于工程造价和工期是决定性影响因素。通过对多目标模糊优选模型的介绍，并应用此模型对南京地铁珠江路站一鼓楼站区间隧道软。流塑地层浅埋暗挖辅助施工方法进行了模糊优选，用量化的手段选择出最佳施工方案，有效地解决了受众多模糊性和不确定性因素影响的地铁施工方案的多目标优化决策问题。     

多目标模糊优选在地铁施工方案选择中的应用

地铁施工方案对于工程造价和工期是决定性影响因素。通过对多目标模糊优选模型的介绍 ,并应用此模型对南京地铁珠江路站—鼓楼站区间隧道软～流塑地层浅埋暗挖辅助施工方法进行了模糊优选 ,用量化的手段选择出最佳施工方案 ,有效地解决了受众多模糊性和不确定性因素影响的地铁施工方案的多目标优化决策问题     

基于模糊综合评价法的热力管道施工方案比选研究及应用

热力管道穿越复杂地形时的工程施工难度大、技术要求高,施工方案的优选是具有定性和定量指标多种目标的综合评价问题。本文采用模糊综合评价法对过河沉管的施工方案进行比选,首先建立了方案的模糊综合评价模型,然后结合AHP法确定各指标因素的权重,最后根据最大隶属度原则确定最优方案。     

拱桥加固方案的模糊层次比较优选

拱桥加固方案的选择需要考虑的因素比较多,且大部分因素具有模糊性,合理科学地选择加固方案,是保证加固效果和质量的重要前提。以桥梁加固的基本目标——效果可靠、经济合理、技术可行、施工方便,作为评价加固方案的影响因素,利用模糊数学和层次分析法,分解评判指标体系,运用二级模糊综合评价决策方法,进行加固方案的优选比较。结合具体的拱桥加固实例,给出了模糊层次分析评价和加固方案优选的过程。结果证明,模糊层次分析法在拱桥加固方案的优化比选中是可行的。     

给水管网改扩建工程中泵选方案的模糊优选法

针对目前给水管网改扩建工程中泵的选择涉及因素多,且较为复杂的状况,在综合考虑各种影响因素的基础上,利用模糊综合评判理论建立了综合评判优选模型。应用实例介绍了该模型的实现方法。研究结果表明,利用此模型能较好地对多种泵选方案进行综合评价,从而为快速、准确地优选出所需的水泵提供了依据。     

灰色模糊综合评判在施工方案优选中的应用

在分析了影响建筑工程施工方案的因素后,针对被评判对象的特点,根据灰色模型数学的理论,建立了区间数灰色模糊综合评判的数学模型,构造了综合评判的指标体系,提出了建筑工程施工方案优选的思路和方法,并用实例表明评判结果的客观可信度。     

模糊综合评价在逆作法施工方案优选中的应用

施工方案的选择是施工中的重要环节 ,逆作法施工方案种类多 ,影响因素多 ,运用模糊综合评价理论进行方案优选 ,可快速准确的获得造价低、工期短、施工安全、质量可靠的最佳施工方案     

水利工程项目临时用地方案优选的灰色模糊综合评价模型及其应用

近年来随着水利工程项目的大规模建设,水利工程项目临时用地问题引起人们广泛关注。通过对水利工程项目临时用地进行概念界定及分类,在此基础上,针对临时用地方案影响因素多、内容复杂等特点,建立了水利工程项目临时用地方案评价指标体系,构建了灰色模糊综合评价模型对各方案进行优选,最后,通过实例对模型的可行性进行了验证。     

模糊综合评判在加宽路基施工方案优选中的应用

施工方案的选择是施工中的重要环节,公路中路基压实的施工方案种类多,影响因素多,运用模糊综合评价理论进行方案优选,可快速准确的获得造价低、工期短、施工安全、质量可靠的最佳施工方案。     

招标模式优选中的模糊层次评价研究

针对影响招标模式选择的因素进行分析，在模糊数学原理基础上运用层次分析法，建立了招标模式选择的模糊层次评价模型．通过模型在工程实践中的应用，验证了模糊层次综合评价方法在招标模式优选中的有效性，可为业主选用合适的工程管理模式提供一种行之有效的方法。     

A Support System for Fuzzy Optimum Aseismic Structural Design of Reinforced Concrete Buildings Using Graphical Representation

Abstract: In this paper, a support system of optimum aseismic design is proposed on the basis of fuzzy set theory and a graphical representation method. In optimum aseismic design of buildings, it is necessary to take account of subjective evaluation of users. In this system, a hierarchical model is employed to idealize and model the decision process of optimum aseismic design. By applying fuzzy set theory, this system can take account of subjective evaluation of users. The system is a prototype of an expert system for optimum aseismic design, and its knowledge is compiled interactively as numerical values by the fuzzy confluence rule and membership functions in fuzzy set theory in accordance with the hierarchical model given by users. Knowledge, which is necessary to perform the inference on optimum aseismic design, is acquired interactively. Optimization is performed by fuzzy multiobjective maximizing decision, and the maximum evaluation values of the top attribute can be found. Furthermore, distributions of the grade of membership value in maximizing the decision process are graphically represented, so the user can understand this process easily and intuitively. A case study is carried out for a reinforced concrete typical high school building in Kobe City.     

模糊评价法在公路隧道洞门效果评价中的应用

鉴于影响公路隧道洞门选择的因素很多,从设计、施工、运营及景观效果三个方面选取了洞门的评价因素,利用模糊层次分析法和模糊综合评价法进行综合评价,最后利用最大隶属度原则得出评价结论,通过现场洞门设置实例说明此综合评价方法效果良好,操作简单有效。     

模糊综合评价在水环境质量评价中的应用

在水环境质量的评价过程中,通常涉及到大量的复杂现象和多种因素的相互作用,评价中存在大量的模糊现象和模糊概念.介绍了模糊综合评价法的原理及其评价方法,同时将人工神经网络引入模糊综合评价隶属矩阵的确定过程,利用人工神经网络构造隶属函数矩阵,并以青岛大沽河为例,利用模糊综合评价法对其水质进行了评价,并取得了良好的评价效果.     

Selection of slab formwork system using fuzzy logic

Formwork plays an important role in building construction. The selection of an appropriate formwork system can reduce project cost, improve quality and speed up the construction process. Although the selection of an appropriate formwork system requires years of experience in formwork design, few experienced personnel may be available, especially in small/medium size contracting companies. With the lack of such experts, the costly outsourcing option becomes essential otherwise the selection of a particular formwork system might not be appropriate. A structured approach is developed to help decision makers in small/medium Egyptian construction companies to select the appropriate horizontal formwork system(s) for their projects. This can be achieved by recognizing the project governing factors affecting the selection process. Based on these factors, a knowledge base is developed to facilitate the process. A fuzzy logic system is used to automate the process and overcome ambiguity and uncertainty in the selection process. The system is shown to be useful and accurate in its application to a real-life case. A survey of formwork experts reveals its ease of use. Further research will expand the system to consider vertical formwork selection to ensure full compatibility.     

空间网格结构优化设计的模糊判决方法研究

在空间网格结构的优化设计过程中，必然会遇到大量的不确定性信息和因素，而且往往要考虑多个目标函数，而各个目标之间存在矛盾及各目标的解具有冲突性，多目标优化问题要求各个目标函数都达到最优一般很难．本在经典模糊判决法的基础上，提出了四种改进的模糊判决法，并利用隶属函数建立模糊优化数学模型转化为非模糊的单目标优化模型，从而可以使用普通优化程序得到模糊优化解．最后，通过二十五杆塔架的数值例题来说明本方法的求解过程并验证了其模糊判决方法的有效性和可行性．     

Evaluating stakeholder satisfaction during public participation in major infrastructure and construction projects: A fuzzy approach

Numerous different and sometimes discrepant interests can be affected, both positively and negatively, throughout the course of a major infrastructure and construction (MIC) project. Failing to address and meet the concerns and expectations of the stakeholders involved has resulted in many project failures. One way to address this issue is through a participatory approach to project decision making. Whether the participation mechanism is effective or not depends largely on the client/owner.This paper provides a means of systematically evaluating the effectiveness of the public participation exercise, or even the whole project, through the measurement of stakeholder satisfaction. Since the process of satisfaction measurement is complicated and uncertain, requiring approximate reasoning involving human intuition, a fuzzy approach is adopted. From this, a multi-factor hierarchical fuzzy comprehensive evaluation model is established to facilitate the evaluation of satisfaction in both single stakeholder group and overall MIC project stakeholders.     

A fuzzy logic approach to model delays in construction projects using rotational fuzzy fault tree models

Delays in construction projects are inevitable and, as a result, claims and disputes arise. Different causes of delay can come into play and therefore the need to identify and classify different causes of project delay arises. Different factors that contribute to project delay affect the likelihood of project delay in different degree of effectiveness. Fuzzy fault tree analysis (FTA) is suggested by this research to estimate the likelihood of project delay. Likelihood of delay membership function is further quantified using the weighted average defuzzification method. Two fuzzy logic models are implemented into the fuzzy FTA, using Visual Basic software: the models discussed in this research are Baldwin's rotational model and the Angular model. Comparison between the two fuzzy logic models has been carried out. Validation of the fuzzy FTA computer model is performed. Validation of the model was performed for adequacy and applicability of the model. On average, the validation performed by independent construction engineers and fuzzy logic experts produced satisfactory results. The computer software suggested by this study is an attempt to assess the likelihood of the project delay, which helps reduce delays in construction projects that can cause time loss.     

Using fuzzy multiple criteria decision making approach to enhance risk assessment for metropolitan construction projects

The undertaking of construction projects in metropolitan areas is a risky, competitive, and dynamic proposition requiring a reliable risk assessment model for adequate planning. This study employs a fuzzy multiple criteria decision making (FMCDM) approach to systematically assess risk for a metropolitan construction project. Consistent fuzzy preference relations (CFPR) are used to measure and investigate the relative impact on project performance of twenty identified risk factors included in four risk dimensions. The fuzzy multiple attributes direct rating (FMADR) approach is employed to analyze the occurrence probability of multiple risk factors. Furthermore, the level of risk for the overall project caused by individual risk factor is evaluated with the synthesized analysis of the relative impacts and probability of occurrence. The implementation of FMCDM makes the proposed risk assessment approach more reliable and practical than the traditional statistical approach. The proposed approach can be employed to effectively evaluate the overall project risk, and can be benefited to efficiently identify significant risks of a metropolitan construction project.     

工程投标决策的模糊综合评价方法

讨论了基于模糊数学、集值统计原理和层次分析法的工程投标综合优选模型,为承包商提供了一种投标方案模糊综合评价决策方法,并通过实例对其进行了验证,结果表明,此法对承包商进行工程投标决策,提高中标率有一定的积极意义。     

工程项目时间/成本模糊集优化

从分析工程项目的时间／成本影响因素入手，综合考虑定性和定量因素，包括管理水平、管理复杂程度、资源分配情况等，提出了模糊集理论的时间／成本决策模型，从而促进工程项目时间／成本模糊集优化的研究。