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Dynamic time-cost-quality tradeoff of rockfill dam construction based on real-time monitoring

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2017年第1期18卷 1-19页

作者： Deng-hua ZHONG Wei HU bin-ping wu Zheng LI Jun ZHANG The State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Tianjin 300072 China

Time, cost, and quality are three key control factors in rockfill dam construction, and the tradeoff among them is important. Research has focused on the construction time-cost-quality tradeoff for the planning or design phase, built on static empirical data. However, due to its intrinsic uncertainties, rockfill dam construction is a dynamic process which requires the tradeoffto adjust dynamically to changes in construction conditions. In this study, a dynamic time-cost-quality tradeoff （DTCQT） method is proposed to balance time, cost, and quality at any stage of the construction process. A time-cost-quality tradeoff model is established that considers time cost and quality cost. Time, cost, and quality are dynamically estimated based on real-time monitoring. The analytic hierarchy process （AHP） method is applied to quantify the decision preferences among time, cost, and quality as objective weights. In addition, an improved non-dominated sorting genetic algorithm （NSGA-II） coupled with the technique for order preference by similarity to ideal solution （TOPSIS） method is used to search for the optimal compromise solution. A case study project is analyzed to demonstrate the applicability of the method, and the efficiency of the proposed optimization method is compared with that of the linear weighted sum （LWS） and NSGA-II.

关键词： Dynamic time-cost-quality tradeoff Rockfill dam construction Real-time monitoring Decision preferences

基于实时监控的碾压混凝土坝施工仿真（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第5期19卷 367-383页

作者： Qian-wei WANG Deng-hua ZHONG bin-ping wu Jia YU Hao-tian CHANG State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University

目的:碾压混凝土坝施工过程中施工仿真参数会随着施工现场环境变化而变化。本文探讨实时监控方法获取的施工信息对施工进度仿真的影响,研究碾压混凝土坝施工仿真参数自适应更新方法,提高施工仿真的精度。创新点:1.通过碾压混凝土坝施工... 详细信息

目的:碾压混凝土坝施工过程中施工仿真参数会随着施工现场环境变化而变化。本文探讨实时监控方法获取的施工信息对施工进度仿真的影响,研究碾压混凝土坝施工仿真参数自适应更新方法,提高施工仿真的精度。创新点:1.通过碾压混凝土坝施工信息实时获取技术,分析计算碾压混凝土坝施工仿真参数;2.利用贝叶斯更新技术对施工仿真参数进行更新;3.利用模糊均生函数对坝区短期降雨量进行预测;4.建立基于实时监控的碾压混凝土坝施工仿真模型,对碾压混凝土坝施工过程进行仿真并与实际施工进度对比。方法:1.通过实地采集,获取碾压混凝土坝施工过程中实时施工信息(图2);2.通过理论推导,构建施工仿真参数先验分布均值和方差与后验分布均值和方差之间的关系,得到施工仿真参数更新方案(公式(16)和(17));3.通过理论推导,利用已知坝区降雨量数据预测未来短期内的降雨情况(图5);4.通过仿真模拟,得到施工仿真参数更新后的仿真成果并将其与实际施工进行对比,验证本方法的有效性和准确性。结论:1.施工仿真参数的准确性对碾压混凝土坝施工仿真结果准确性有很大影响;2.可以利用贝叶斯更新技术对施工仿真中的仿真参数进行更新,利用模糊均生函数对坝区短时期内降雨量进行预测;3.运用基于实时监控的碾压混凝土坝施工仿真方法对碾压混凝土坝施工过程进行仿真,仿真结果与实际施工进度之间的偏差明显减少,仿真准确性明显提高。

关键词：碾压混凝土坝施工仿真实时监控贝叶斯更新模糊均生函数

基于云-模糊模型的堆石坝施工质量评估（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第4期19卷 289-303页

作者： Fei WANG Deng-hua ZHONG Yu-ling YAN bing-yu REN bin-ping wu State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University

目的:施工质量对于大坝建设期及运行期的安全至关重要。由于施工过程中的信息不完备及碾压质量与影响因素之间的关系并不是完全确定等原因,传统的评估方法很少考虑不确定性对施工质量的影响。本文旨在探讨考虑不确定性影响的碾压质量评... 详细信息

目的:施工质量对于大坝建设期及运行期的安全至关重要。由于施工过程中的信息不完备及碾压质量与影响因素之间的关系并不是完全确定等原因,传统的评估方法很少考虑不确定性对施工质量的影响。本文旨在探讨考虑不确定性影响的碾压质量评估方法,改善施工质量评估的可信性。创新点:1.通过研究模糊神经网络与径向基神经网络,结合云模型建立云-模糊模型;2.建立施工质量三指标体系评价方法。方法:1.通过碾压质量实时监控系统和现场试坑试验获取参数数据;2.通过云分析,建立云-模糊模型;3.对比不同的模型,验证云-模糊模型的可行性;4.利用验证的云-模糊模型对大坝施工仓面进行压实干密度预测;5.计算评价体系的三指标,对施工质量进行评估。结论:1.云-模糊模型不但能在精度上满足预测要求,而且能够综合考虑施工质量与影响因素之间的不确定性关系;2.云-模糊评价方法弥补了传统评价方法仅追求精度的单一性,使得施工质量评价更符合客观规律;3.提出的施工质量三指标评价体系充实了传统的评价方法,能够更客观地指导实际工程建设。

关键词：堆石坝云模型不确定性施工质量评价

A novel stacking-based ensemble learning model for drilling efficiency prediction in earth-rock excavation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第12期23卷 1027-1046页

作者： Fei LV Jia YU Jun ZHANG Peng YU Da-wei TONG bin-ping wu State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300350China

Accurate prediction of drilling efficiency is critical for developing the earth-rock excavation *** single machine learning(ML)prediction models usually suffer from problems including parameter sensitivity and *** addition,the influence of environmental and operational factors is often *** response,a novel stacking-based ensemble learning method taking into account the combined effects of those factors is *** multiple comparison tests,four models,e Xtreme gradient boosting(XGBoost),random forest(RF),back propagation neural network(BPNN)as the base learners,and support vector regression(SVR)as the meta-learner,are selected for ***,an improved cuckoo search optimization(ICSO)algorithm is developed for hyper-parameter optimization of the ensemble *** application to a real-world project demonstrates that the proposed method outperforms the popular single ML method XGBoost and the ensemble model optimized by particle swarm optimization(PSO),with 16.43%and 4.88%improvements of mean absolute percentage error(MAPE),respectively.

关键词： Drilling efficiency Prediction Earth-rock excavation Stacking-based ensemble learning Improved cuckoo search optimization(ICSO)algorithm Comprehensive effects of various factors Hyper-parameter optimization

Dual-source CT in the Differential Diagnosis of Acute Chest Pain

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Dual-source CT in the Differential Diagnosis of Acute Chest ...

中国医师协会放射医师分会首届会员大会暨第四届医学影像山东论坛、山东省第16次放射学会议暨山东省第14届医学影像学学术研讨会

作者： WANG Xi-ming wu Le-bin CHENG Zhao-ping wu Da-wei LIU cheng

*** most important differential diagnoses of acute chest pain include myocardial infarction,aortic dissection,and pulmonary *** purpose of this study was to explore the diagnostic value of Dual-source CT angiography f... 详细信息

关键词： Dual-source CT in the Differential Diagnosis of Acute Chest Pain

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煤粉燃烧火焰辐射光谱实验研究

光谱学与光谱分析 2016年第11期36卷 3492-3496页

作者：桂欣扬 Aymeric Alliot 杨斌周骛平力蔡小舒上海理工大学颗粒与两相流测量研究所/上海市动力工程多相流动与传热重点实验室上海200093

针对煤粉燃烧辐射光谱问题,利用光纤光谱仪对煤粉平面火焰炉实验装置煤粉燃烧火焰辐射光谱进行了测量,详细分析了煤粉辐射光谱特征,并基于普朗克辐射传热定律,通过对光谱仪波长响应特性的标定,得到火焰绝对辐射强度随波长的分布情况,进... 详细信息

针对煤粉燃烧辐射光谱问题,利用光纤光谱仪对煤粉平面火焰炉实验装置煤粉燃烧火焰辐射光谱进行了测量,详细分析了煤粉辐射光谱特征,并基于普朗克辐射传热定律,通过对光谱仪波长响应特性的标定,得到火焰绝对辐射强度随波长的分布情况,进而利用最小二乘法获得火焰温度与辐射率参数,由此提出基于煤粉燃烧火焰辐射光谱测量的火焰参数测量方法。利用该方法对不同燃烧条件下煤粉燃烧参数进行测量,开展了不同燃烧参数下煤粉火焰辐射光谱实验研究,研究结果表明：煤粉燃烧火焰辐射在200~1 100nm波段具有较强且连续的光谱特征,基于普朗克辐射定律与最小二乘法可实现煤粉燃烧火焰温度与辐射率的测量;煤粉燃烧火焰辐射光谱在590,766,769和779nm附近可见明显的Na和K等碱金属痕量元素原子光谱发射谱线,并且这些原子谱线的出现与火焰温度有关;随着煤粉浓度的提高,虽然燃烧温度变化不大,但由于火焰辐射率的增加,造成辐射光谱强度的大幅提升。这对锅炉煤粉燃烧优化具有重要参考价值。

关键词：辐射光谱煤粉燃烧温度测量辐射率测量燃烧诊断

Human apoAI overexpression diminishes LPS-induced systemic inflammation and multiple organ damage in mice

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Human apoAI overexpression diminishes LPS-induced systemic i...

基于效率视角的公路运输与国民经济动态发展关系研究

第四届全国血脂分析与临床学术研讨会暨第九届全国脂蛋白学术会议

作者： Yue Li Ji-bin Dong Man-ping wu Department of Biochemistry,School of Pharmacy,Fudan University,Shanghai,200032,China

Apolipoprotein A Ⅰ (apoA Ⅰ) is the major apolipoprotein of high density lipoprotein (HDL).To investi- gate the protective effect of apoA Ⅰ against lipopolysaccharide (LPS)-induced systemic inflammation and multiple organ damage in mice,we established a human apoA Ⅰ overexpression mouse model using recombinant adenovirus vector (AdV-AI).The histomorphologic analysis showed that AdV-AI administration greatly at- tenuated LPS-induced acute injury in lung and ***-AI treatment also significantly inhibited LPS- induced increments of tumor necrosis factor (TNF)-α,interleukin (IL)-6,IL-1β levels in serum (P< 0.01,P<0.05 and P<0.05,respectively) and in bronchoalverolar lavage (BAL) fluid (P<0.05,re- spectively),and of serum creatine kinase (CK) and creatinine (CRE) levels (P<0.05,respectively). Moreover,we found that the increments of CD14 expression in liver and lung induced by LPS were significantly reduced by AdV-AI treatment (P<0.05 and P<0.01,respectively).In conclusion,adenovirus-medi- ated apoA Ⅰ overexpression plays a protective effect against LPS-induced systemic inflammation and multiple organ damage in *** effect may attribute partly to the suppression of inflammatory cytokines release and reduction of CD14 expression.

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公路交通科技 2017年第10期34卷 152-158页

作者：董彬任翠萍吴群琪长安大学经济与管理学院陕西西安710064

为了实现公路运输与国民经济的协调发展,引入Malmquist指数,通过数据包络分析(DEA),测算公路运输效率。基于投入产出视角,通过单位根、协整关系、Granger因果关系的检验,分析了1991—2014年间我国公路运输与国民经济的动态发展关系。研... 详细信息

为了实现公路运输与国民经济的协调发展,引入Malmquist指数,通过数据包络分析(DEA),测算公路运输效率。基于投入产出视角,通过单位根、协整关系、Granger因果关系的检验,分析了1991—2014年间我国公路运输与国民经济的动态发展关系。研究表明:公路运输效率变化与国民经济增长的作用关系存在阶段性特征,总体而言,我国公路运输与国民经济发展还处于非协调状态。其中,1991—2001年间,公路运输效率变化为平稳序列,国民经济增长为一阶平稳序列;而2002—2014年间,公路运输效率变化与国民经济增长都为一阶平稳过程,公路运输效率变化与国民经济增长之间存在协整关系,说明二者之间具有长期的均衡关系。考虑投入因素后公路运输系统与国民经济无显著双向因果关系。国民经济增长能格兰杰引起公路运输效率变化,但公路运输效率变化不能格兰杰引起国民经济增长,说明二者之间仅存在由国民经济到公路运输的单向格兰杰因果关系作用。

关键词：运输经济动态发展关系 Granger因果关系检验公路运输运输效率 Malmquist指数国民经济

A promising approach for quantifying focal stroke modeling and assessing stroke progression:optical resolution photoacoustic microscopy photothrombosis

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Neural Regeneration Research 2025年第7期20卷 2029-2037页

作者： Xiao Liang Xingping Quan Xiaorui Geng Yujing Huang Yonghua Zhao Lei Xi Zhen Yuan ping Wang bin Liu Faculty of Health Sciences University of MacaoMacao Special Administrative RegionChina Center for Cognitive and Brain Sciences University of MacaoMacao Special Administrative RegionChina Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao Special Administrative RegionChina Department of Emergency Zhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

To investigate the mechanisms underlying the onset and progression of ischemic stroke,some methods have been proposed that can simultaneously monitor and create embolisms in the animal cerebral ***,these methods often require complex systems and the effect of age on cerebral embolism has not been adequately studied,although ischemic stroke is strongly *** this study,we propose an optical-resolution photoacoustic microscopy-based visualized photothrombosis methodology to create and monitor ischemic stroke in mice simultaneously using a 532 nm pulsed *** observed the molding process in mice of different ages and presented age-dependent vascular embolism ***,we integrated optical coherence tomography angiography to investigate age-associated trends in cerebrovascular variability following a *** imaging data and quantitative analyses underscore the differential cerebrovascular responses to stroke in mice of different ages,thereby highlighting the technique's potential for evaluating cerebrovascular health and unraveling age-related mechanisms involved in ischemic strokes.

关键词： age-dependent cerebral cortex ischemic stroke mouse model optical coherence tomography angiography photoacoustic microscopy photothrombosis vascular imaging