Risk assessment of corroded casing based on analytic hierarchy process and fuzzy comprehensive evaluation

Casing corrosion during CO2 injection or storage results in significant economic loss and increased production risks.Therefore,in this paper,a corroded casing risk assessment model based on analytic hierarchy process and fuzzy comprehensive evaluation is established to identify potential risks in time.First,the corrosion rate and residual strength characteristics are analyzed through corrosion tests and numerical simulations,respectively,to determine the risk factors that may lead to an accident.Then,an index system for corroded casing risk evaluation is established based on six important factors:temperature,CO2 partial pressure,flow velocity,corrosion radius,corrosion depth and wellhead pressure.Subsequently,the index weights are calculated via the analytic hierarchy process.Finally,the risk level of corroded casing is obtained via the fuzzy comprehensive evaluation.The corroded casing risk assessment model has been verified by a case well,which shows that the model is valuable and feasible.It provides an effective decision-making method for the risk evaluation of corroded casing in CO2 injection well,which is conductive to improve the wellbore operation efficiency.

Analysis of Landscape Vitality of Historical and Cultural Blocks Based on AHPFuzzy Comprehensive Evaluation Method:A Case Study of Daopashi Street in Anqing City

Historical and cultural blocks are witnesses of history and inheritors of culture. As one of the main spaces for outdoor interaction in historical and cultural blocks, the improvement of its vitality is of great significance for the improvement of residential environment and the better inheritance of history and culture. Taking Daopashi Street in Anqing City as an example, an evaluation model of landscape spatial vitality of historical and cultural blocks was constructed from three aspects of viewing function, store status and service facilities, and analytic hierarchy process was used to determine the index weight and vaguely evaluate the landscape spatial vitality of historical and cultural blocks. The results show that through the comparison of weight, architectural style(0.317), the practicability of service facilities(0.168) and plant landscape(0.165) had a significant impact on the landscape spatial vitality of historical and cultural blocks,and the landscape spatial vitality of historical and cultural blocks in Daopashi Street in Anqing City was at a good level.

Fuzzy comprehensive evaluation of bridge quality based on analytical hierarchy process

Bridge quality assessment is an important part in the final acceptance of new bridge construction,and it is also the main basis for the reinforcement or removal of old bridges.We evaluated the weight of each affecting factor to the upper events using progressive analytical hierarchy process(AHP)with the adoption of 3 scaling,reduced the calculation in analytical process,and precluded the nonuniformity of the scaling system.We obtained a comprehensive evaluation system of bridge quality, and verified its practicality and effectiveness using numerical examples.

Evaluation of Comprehensive Benefits of Land Consolidation Based on AHP and FUZZY

Based on the modern comprehensive evaluation method, in accordance with the scientific, objective and systematic principles, we select four factors (economic, social, ecological and landscape benefits), to establish the evaluation indicator system of comprehensive benefits of rural land consolidation. Then using the theory of fuzzy mathematics (FUZZY) and fuzzy relationship synthesis theory, we establish the fuzzy evaluation model of comprehensive benefits of land consolidation; using analytic hierarchy process (AHP), we determine the weight of each indicator, and conduct fuzzy comprehensive evaluation from various levels. By the weighted average synthesis algorithm, we calculate the evaluation indicators and finally summarize the overall evaluation results for comprehensive evaluation. Taking the case of land consolidation project in Shangyao Town, Datong District, Huainan City in Anhui Province, we calculate the case data based on Matlab software, and the calculation results and evaluation level are consistent with the project acceptance results, verifying the feasibility of this evaluation method.

An Empirical Study on Fuzzy Comprehensive Evaluation of Red Tourism Resources Based on AHP

Red tourism, which is featured with spiritual culture, resource fusion and historical socialization, is a remarkable innovation with Chinese characteristics. It is the shinning point of China’s tourism business development. This paper will show the objective and correct evaluation of red tourism resource. Firstly, it will create evaluation index system by theoretical analysis method and expert consultation method. Secondly, it will evaluate each object synthetically by fuzzy comprehensive evaluation method and analytic hierarchy process. Finally, through case study of General Zhang Aiping’s, Former Residence in Dazhou, Sichuan Province, conclusion and related suggestion will be achieved.

Evaluation of Green Development Level of Electric Energy in Distribution Network Based on Multilevel Fuzzy Comprehensive Evaluation

At present,there are few studies on the comprehensive evaluation of green power grid development in China,and all aspects of green power grid need to be evaluated.Therefore,this paper studies the green development level of power distribution network.This paper proposes a multi-level fuzzy comprehensive evaluation method,which first needs to classify the influencing factors.Therefore,this paper constructs an indicator system for the evaluation of green development of power distribution network from three dimensions.In order to avoid the influence of subjective factors,this paper adopts the model combining analytic hierarchy process and entropy weight method to give weight to indexes.Finally,five typical regions are selected for empirical analysis.The results show that the model established in this paper can reflect the green development level of power distribution network in each region and put forward relevant improvement suggestions for each region.

Comprehensive Evaluation Method for Safety Performance of Automobile Textiles

With the gradual increase of car ownership in China and the continuous expansion of travel radius,traffic accidents caused by car safety are also increasing.As far as automobile safety itself is concerned,its evaluation method is constantly evolving,but the safety of automobile textiles,which is an important part of it,is still in its infancy.The article starts from the factors that affect the safety performance of automobiles such as automobile safety theory,vehicle ergonomics and automobile textile performance.Then,the methods of expert investigation,analytic hierarchy process,fuzzy comprehensive evaluation and data analysis are used.In this way,we obtain a grade set for a multi-level index system and determine the weight of each index.Finally,we establish a comprehensive evaluation system for safety of the automobile textiles and select parameters under extreme conditions to verify the system,which proves to be effective and feasible.

A Comprehensive Model for Evaluating Coalbed Methane Reservoirs in China

Coalbed methane reservoir （CBMR） evaluation is important for choosing the prospective target area for coalbed methane exploration and production. This study aims at identifying the characteristic parameters and methods to evaluate CBMR. Based on the geological surveys, laboratory measurements and field works, a four-level analytic hierarchy process （AHP） model for CBMR evaluation is proposed. In this model, different weights are prioritized and assigned on the basis of three main criteria （including reservoir physical property, storage capacity and geological characteristics）, 15 sub-criteria, and 18 technical alternatives; the later of which are discussed in detail. The model was applied to evaluate the CBMR of the Permo-Carboniferous coals in the Qinshui Basin, North China. This GIS-based fuzzy AHP comprehensive model can be used for the evaluation of CBMR of medium-high rank （mean maximum vitrinite reflectance 〉0.5 %） coal districts in China.

Assessment of the environmental comfort of lactating sows via improved analytic hierarchy process and fuzzy comprehensive evaluation

Since there are many interacting influence factors of the comfortable degree of lactating sows,a method that combines improved analytic hierarchy process(IAHP)and fuzzy comprehensive evaluation(FCE)was introduced to conduct a quantitative evaluation of the comfortable degree.Besides,an evaluation index system was established,and the weights of different indicators were determined by using IAHP method,including temperature,relative humidity,concentrations of carbon dioxide(CO_(2)),ammonia(NH_(3)),hydrogen sulfide(H_(2)S),and air speed.The construction method of fuzzy membership function and the calculation method of the parameters were proposed following the principle that the summation of membership degrees is equal to 1.Three basic types of membership functions(MFs),i.e.,ridgemf,gaussmf,and trimf were used to build an evaluation model which fitted IAHP-FCE well.The proposed method was verified and applied based on the environmental data in different seasons obtained from a pig farm in Zhenjiang City,Jiangsu Province,China.It is demonstrated that the proposed IAHP-FCE model with various types of MFs has drawn a unique and consistent conclusion.Moreover,the IAHP-FCE model has a higher correlation coefficient of 0.874 compared with the single-factor evaluation(SFE)model.The IAHP-FCE model could be served as a beneficial strategy for the precise regulation and early warning of environmental conditions to improve sow welfare.

基于IAHP-FUZZY的装配式建筑施工质量风险评价

在国内建筑业升级发展的背景下,具有较多优点的装配式建筑得到了全面发展。为完善装配式建筑施工过程质量风险评估方式,通过分析研究装配式建筑施工的特点,将装配式建筑施工质量风险评价分为3个阶段:施工准备阶段、施工阶段和施工竣工验收阶段。通过建立一套施工质量风险评价指标体系,采用区间层次分析法确定各指标的对应权重,在该基础上结合隶属度函数和模糊综合评价理论构建装配式建筑施工质量风险评价模型,并将该模型运用到实际工程案例中并验证其可行性。

金融保险集团一体化战略的A-FUZZY分析模型及实证研究

随着金融体系深化改革的持续推进,保险业、证券业和银行业的混业经营变得越来越普遍,为了在全球化市场上获得持久竞争优势,金融机构跨行业经营方式也开始向集团化和一体化趋势发展,金融保险集团的一体化成为全球保险业经营体制的最大创新,对于深化金融改革的中国保险行业来说越发重要。文章基于AHP模糊综合量化评价方法构建科学的金融保险集团一体化战略评价模型,采用专家打分数据进行实证分析,发现在一体化战略中组织能力的权重最高,业务创新和资源整合是金融保险集团一体化战略的重要助推器。

AHP-FCE Based Physical Exercise Risk Evaluation Model

Exercise is a highly proven and beneficial health promotion modality.But it is very difficult to determine whether the person during exercise is safe.A unique and comprehensive approach is proposed to perform physical exercise risk evaluation(PERE),in which personalized factors are determined basing on grey correlation analysis,analytic hierarchy process(AHP) method is used to structure the large numbers of risk factors,and fuzzy comprehensive evaluation(FCE) is applied to fuzzify the factors and compute the exercise risk level.Finally,an actual calculation example is used to verify the feasibility of the method.

Study on Performance Evaluation of Micro-course Teaching Team

In the team construction,fair and impartial performance evaluation is a very important part. The evaluation results will directly affect the team's work enthusiasm. Through consulting extensive data and materials,this paper firstly built a micro-course teaching team evaluation indicator system. Secondly,using the analytic hierarchy process( AHP),it calculated the weight of each indicator. Finally,using the fuzzy comprehensive evaluation method,it evaluated the micro-course. This study is expected to provide a methodological support for the construction and management of the micro-course teaching team.

College Teaching Quality Evaluation Model and Implementation

Comprehensive Evaluation of the Teaching Quality is a multi-level evaluation.The evaluation involves a lot of content.Evaluation by the evaluator level of know ledge,understanding the direct impact of ability and personal preferences,are difficult to completely exclude the bias caused by human factors.Based on this idea,a new method of teaching quality evaluation is proposed.It is the fuzzy comprehensive evaluation method to be applied to teaching quality evaluation system.It is the evaluation rules draw n up by the netw ork according to the Office of Academic Affairs to evaluate teachers,w hich systematize the evaluation of teaching quality management,standardization,automation,and improve management efficiency.

基于IAHP-Fuzzy评估法的煤矿顶板安全评估

为减少矿井顶板事故发生,使矿井顶板安全得到科学和有效的防治,需对煤矿顶板的安全状态进行评估。在事故致因理论的基础上,从人、物、环境和管理4个维度构建了17项评估指标的煤矿顶板安全状态评估指标体系,建立IAHP-Fuzzy评估模型,利用改进层次分析法(IAHP)分析各项指标权重,通过模糊(Fuzzy)综合评估法进行全面评估,以陕西榆林某煤矿为实例对象进行评估。结果表明,该煤矿的顶板状态评估得分为74.82,对应安全等级为一般安全,符合该煤矿的实际情况。IAHP-Fuzzy评估模型适用于煤矿顶板安全状态评估。

基于AHP-FUZZY模型的急倾斜中厚矿体采矿方法优选

采用层次分析法和模糊数学对其采矿方法进行优选,选择适合该矿的最佳采矿方法.首先通过查阅资料初步选出适合该矿体的采矿方法;其次运用层次分析法构造了采矿方法的影响因素指标的层次分析模型,确定了各指标的权值,最后根据模糊数学理论进行综合评判确定最佳采矿方法为向上水平分层充填法.该方法投入生产后,矿石损失贫化大大减小,可实现矿石价值84亿,节约42万元,取得良好的经济效益.

基于Fuzzy-AHP的边坡稳定性分析评价

针对影响水电站边坡稳定的因素存在明显的复杂性和模糊性,采用单一数学分析方法较难有效评价其稳定性的问题,根据水电站边坡实际工程特点,总结了对边坡稳定性分析具有重要参考意义的4类14项评价指标,建立了基于Fuzzy-AHP的边坡稳定性模糊综合评价模型。利用所求评价指标的隶属度和权重值,计算模糊综合评价矩阵,实现了边坡稳定性分级,并通过清江隔河岩水电站工程对所建评价模型合理性进行验证。结果表明:Fuzzy-AHP模型计算所得最大隶属度为0.5302,与之对应的边坡评价等级为稳定状态,评价结果与现场情况基本吻合,验证了所建模糊综合评价模型的准确性与科学性。该方法可为同类型地质条件水电站边坡灾害治理工作提供一定借鉴。

基于改进方法的承德地表水环境质量评价

为客观反映地表水水质状况,采用层次分析法和熵权法组合赋权以及加权平均综合评价原则改进模糊综合评价法,并与单因子评价法、内梅罗指数法、传统模糊综合评价法进行比较,评价承德地区地表水环境质量。结果表明:2021年承德地区地表水水质有明显的时空差异性,除7—9月的部分断面水质为较差外,其余断面水质均在Ⅰ~Ⅲ类;影响承德地区地表水水质的主要因子为COD_(Mn)和TP;单因子评价法和内梅罗指数法无法反映整体水质状况,改进的模糊综合评价法相较于传统模糊综合评价法兼顾了各污染因子间相互作用,并弱化了个别水质指标对评价结果的影响,且能够对同一类别水质进行排序,更适用于承德地区地表水环境质量评价。

基于IAHP-Fuzzy法的绿色建筑绿色度评价

绿色建筑是推进我国建筑领域实现碳中和的重要发展方向,为进一步完善我国绿色建筑评价方法,以适应绿色建筑的快速发展,结合我国新版GB/T 50378—2019《绿色建筑评价标准》和国内外学者提出的绿色建筑评价模型,本文从安全耐久、健康舒适、生活便利、资源节约、环境宜居五个维度构建绿色建筑绿色度评价指标体系,运用改进层次分析法确定各指标权重,根据模糊综合评价建立了绿色建筑绿色度评价模型,并通过实例研究验证了该方法的可行性和实用性,并针对评价结果提出相应对策,以期为我国绿色建筑发展提出切实有效的建议。

基于层次分析法的崂山旅游文创设计

基于层次分析法,建立一种旅游文创产品设计流程,并将崂山旅游文化融入文创产品的设计中,发挥崂山当地文化特色,深入挖掘崂山旅游文化内涵,为旅游文创产品设计提供多元化设计思路。首先,从线上线下两方面调研崂山旅游文化,构建文化筛选评价模型并以此为参考,筛选合适的崂山旅游文化要素,然后将筛选出的文化要素用因子提取的方法进行图案提炼,并将其运用到文创产品的设计中,最后,运用模糊综合评价法对设计出的方案进行评价。建立旅游文创设计流程,完成崂山旅游文创产品设计。在崂山旅游文创产品设计中,通过运用AHP层次分析法,初步构建满足旅游文创开发的设计需要;能够更加客观完善地选取崂山道教旅游文化元素,结合当地文旅特色完成文创产品的创作,力求传播当地文化特色,是文旅产品设计的新思路。