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Predicting torsional capacity of reinforced concrete members by data-driven machine learning models

Frontiers of Structural and Civil Engineering 2024年第3期18卷 444-460页

作者： Shenggang CHEN Congcong CHEN Shengyuan LI junying guo Quanquan guo Chaolai LI School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 211116China Jiangsu Key Laboratory Environmental Impact and Structural Safety in Engineering China University of Mining and TechnologyXuzhou 211116China China Nuclear Power Design Co.Ltd. Shenzhen 518031China School of transportation and science engineering Beihang UniversityBeijing 100191China China Construction First Group Corporation Limited Beijing 100161China

Due to the complicated three-dimensional behaviors and testing limitations of reinforced concrete(RC)members in torsion,torsional mechanism exploration and torsional performance prediction have always been *** the present paper,several machine learning models were applied to predict the torsional capacity of RC *** results of a total of 287 torsional specimens were collected through an overall literature *** of extreme gradient boosting machine(XGBM),random forest regression,back propagation artificial neural network and support vector machine,were trained and tested by 10-fold cross-validation *** performances of proposed machine learning models were evaluated and compared,both with each other and with the calculated results of existing design codes,i.e.,GB 50010,ACI 318-19,and Eurocode *** results demonstrated that better predictive performance was achieved by machine learning models,whereas GB 50010 slightly overestimated the torsional capacity,and ACI 318-19 and Eurocode 2 underestimated it,especially in the case of ACI *** XGBM model gave the most favorable predictions with R^(2)=0.999,RMSE=1.386,MAE=0.86,andλ=***,strength of concrete was the most sensitive input parameters affecting the reliability of the predictive model,followed by transverse-to-longitudinal reinforcement ratio and total reinforcement ratio.

关键词： RC members torsional capacity machine learning models design codes

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金融不确定性、企业违约风险与宏观经济下行

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国际金融研究 2024年第7期 85-96页

作者：郭珺莹陈国进陈文鹏赵向琴厦门大学经济学院

内容:金融不确定性对经济体的负面影响不容忽视。本文构建包含银行与企业的两部门模型,结合模型推导以及数值模拟研究金融不确定性对经济下行风险的影响及其传导机制,并基于分位数回归对理论模型的结论进行检验。主要的研究结论如下:第... 详细信息

内容:金融不确定性对经济体的负面影响不容忽视。本文构建包含银行与企业的两部门模型,结合模型推导以及数值模拟研究金融不确定性对经济下行风险的影响及其传导机制,并基于分位数回归对理论模型的结论进行检验。主要的研究结论如下:第一,金融不确定性对5%分位点产出增长率(即在险增长)有显著的负面影响,且该负面影响数倍于其他分位点,金融不确定性上升将加剧经济下行风险。第二,金融不确定性上升将紧缩银行信贷条件,影响企业的投资与生产,导致企业破产违约概率上升,加剧经济下行风险,而且企业违约风险上升后,会进一步放大金融不确定性对经济下行风险的负面影响。第三,房价下跌将加剧金融不确定性对经济下行风险的负面影响。本文为理解金融不确定性与经济增长的关系提供了新证据,为实现稳增长目标提供了新思路。

关键词：金融不确定性企业违约风险经济下行风险分位数回归

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钢衬里锈蚀对安全壳密封性的影响

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武汉大学学报（工学版） 2024年第4期57卷 435-445页

作者：李鑫波郭俊营李忠诚李文旭贡金鑫大连理工大学建设工程学部辽宁大连116024 海岸和近海工程国家重点实验室辽宁大连116024 深圳中广核工程设计有限公司广东深圳518031 核电安全监控技术与装备国家重点实验室广东深圳518172

安全壳钢衬里锈蚀后的风险评估对保障核安全具有重要意义,开展风险评估之前,需要对锈蚀钢衬里的性能及其对安全壳密封性的影响进行研究。结合国内外钢衬里典型锈蚀案例,论述了其锈蚀特征和机理;介绍了锈蚀钢衬里力学性能相关研究,并针... 详细信息

安全壳钢衬里锈蚀后的风险评估对保障核安全具有重要意义,开展风险评估之前,需要对锈蚀钢衬里的性能及其对安全壳密封性的影响进行研究。结合国内外钢衬里典型锈蚀案例,论述了其锈蚀特征和机理;介绍了锈蚀钢衬里力学性能相关研究,并针对研究的不足进行了试验探究;介绍了安全壳钢衬里锈蚀后的密封性研究成果,并分析了钢衬里锈蚀模拟存在的问题;结合试验结果提出了一种钢衬里锈蚀模拟方法,并与国外方法进行了对比。结果表明:安全壳施工阶段避免混凝土内遗留杂物和保持涂层完好是防止钢衬里锈蚀最有效的方法;锈蚀率小于50%时,钢衬里的弹性模量基本不受锈蚀影响,但随锈蚀率增大,其屈服强度、极限抗拉强度和极限拉伸应变近似呈线性下降规律;钢衬里锈蚀会增大安全壳在事故工况下发生泄漏的风险;国外钢衬里锈蚀模拟方法高估了严重锈蚀情况下钢衬里撕裂时的应变和内压,采用提出的锈蚀模拟方法评估安全壳的密封性更加安全。

关键词：安全壳钢衬里锈蚀机理力学性能密封性锈蚀模拟

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Vibration response and safety control for blasting vibration of the existing tunnel with defects

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Underground Space 2024年第2期15卷 76-89页

作者： junying Xia Bo Wang Xinxin guo Zhuoxiong Xie Key Laboratory of Transportation Tunnel Engineering Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China Guangdong Communication Planning&Design Institute Group Co. LtdGuangzhou 510507China

Current studies on blasting construction of small clear-distance tunnels have not considered the impact of existing tunnel lining defects when establishing safety *** paper offers a series of study results based on the blasting project of a new tunnel adjacent to the existing defect Xinling tunnel to thoroughly examine the dynamic response,safety control standards,and measures of the existing defect ***,structural models were developed to investigate the influence of the presence or absence of specific defects(like lining cracks and cavities behind the lining)on the dynamic response of the current tunnel lining to identify the most unfavorable defect ***,establish safety control standards for intact linings and those with the most unfavorable ***,two types of control measures,single safe charge and reasonable delay time,were studied based on the established safety control *** particular,the most adverse position of cracks was the wall facing the explosion,the rise in depth was more unfavorable for vibration response,and the impact of the longitudinal crack was restricted to the vicinity of the *** the vault was the most adverse cavity position,the rise in cavity area was more damaging,and the influence range varied with longitudinal cavity ***,the impact of cracks was mainly evident in the amplification effect of stress at the crack *** contrast,cavities had varied degrees of amplification effects on the vibration velocity and stress response and a relatively extensive influence *** control research was conducted,when the tunnel was intact,with a right wall crack,a vault cavity,and both vault cavity and crack for this project,the peak particle velocity(PPV)of the safety control standard for vibration velocity was 13,10,13,and 8 cm/s,respectively,and the respective single safe charge could be adjusted at 64,53,37,and 25 ***,the presence of different defects had a relati

关键词： Existing tunnel Defect Blasting construction Vibration response Control standards and measures

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不利的学习环境对住院医师学习意愿的影响及相关因素分析

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中国毕业后医学教育 2024年第9期8卷 670-673页

作者：周芹吴晓丹邵欣欣杨璐郭隽英中山大学附属第一医院麻醉科广东广州510080

目的该研究旨在从住院医师的视角出发,探讨在不利的学习环境下,住院医师仍选择坚持学习的原因及其相关因素分析。方法对选修《围术期临床思维培训》课程的15位麻醉科住院医师进行半结构式访谈,对访谈资料进行分析整理。结果主题内容分... 详细信息

目的该研究旨在从住院医师的视角出发,探讨在不利的学习环境下,住院医师仍选择坚持学习的原因及其相关因素分析。方法对选修《围术期临床思维培训》课程的15位麻醉科住院医师进行半结构式访谈,对访谈资料进行分析整理。结果主题内容分析得出了4个核心主题:学习目标,学习兴趣,同伴选择和在线学习。结论在面对不利的学习环境时,明确的学习目标,浓厚的学习兴趣是维持住院医师学习意愿的重要因素和有力支持;同伴的选择具有较强的影响力,同伴学习有助于提升学习意愿;在线学习已获得住院医师的认可,与面授课形成良好的互补。

关键词：学习意愿学习目标在线学习麻醉科住院医师规范化培训

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Hepatic steatosis is associated with dysregulated cholesterol metabolism and altered protein acetylation dynamics in chickens

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Journal of Animal Science and Biotechnology 2024年第1期15卷 53-67页

作者： Xiaoli guo Qianqian Zhou Jiaming Jin Fangren Lan Chaoliang Wen junying Li Ning Yang Congjiao Sun National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics Breeding and ReproductionMinistry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing 100193China

Background Hepatic steatosis is a prevalent manifestation of fatty liver, that has detrimental effect on the health and productivity of laying hens, resulting in economic losses to the poultry industry. Here, we aimed to systematically investigate the genetic regulatory mechanisms of hepatic steatosis in laying *** Ninety individuals with the most prominent characteristics were selected from 686 laying hens according to the accumulation of lipid droplets in the liver, and were graded into three groups, including the control, mild hepatic steatosis and severe hepatic steatosis groups. A combination of transcriptome, proteome, acetylome and lipidome analyses, along with bioinformatics analysis were used to screen the key biological processes, modifications and lipids associated with hepatic *** The rationality of the hepatic steatosis grouping was verified through liver biochemical assays and RNA-seq. Hepatic steatosis was characterized by increased lipid deposition and multiple metabolic abnormalities. Integration of proteome and acetylome revealed that differentially expressed proteins(DEPs) interacted with differentially acetylated proteins(DAPs) and were involved in maintaining the metabolic balance in the liver. Acetylation alterations mainly occurred in the progression from mild to severe hepatic steatosis, i.e., the enzymes in the fatty acid oxidation and bile acid synthesis pathways were significantly less acetylated in severe hepatic steatosis group than that in mild group(P < 0.05). Lipidomics detected a variety of sphingolipids(SPs) and glycerophospholipids(GPs) were negatively correlated with hepatic steatosis(r ≤-0.5, P < 0.05). Furthermore, the severity of hepatic steatosis was associated with a decrease in cholesterol and bile acid synthesis and an increase in exogenous cholesterol *** In addition to acquiring a global and thorough picture of hepatic steatosis in laying hens, we were able to reveal the role of ac

关键词： Acetylation Cholesterol metabolism Hepatic steatosis Laying hens Multiomics

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语言、音乐和立法——论卢梭的立法学及其语言学根基

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哲学动态 2023年第2期 90-98页

作者：郭军营同济大学哲学系

在早年关于音乐与语言学的作品中,卢梭强调了旋律在音乐和人类原始语言中的核心位置。旋律是对激情的模仿、表达和传递,它在说者与听者之间塑造和维系了一个情感共同体。就立法学问题来说,卢梭在《爱弥儿》中把建立共同体的关键归结为... 详细信息

在早年关于音乐与语言学的作品中,卢梭强调了旋律在音乐和人类原始语言中的核心位置。旋律是对激情的模仿、表达和传递,它在说者与听者之间塑造和维系了一个情感共同体。就立法学问题来说,卢梭在《爱弥儿》中把建立共同体的关键归结为去除人的绝对存在,将其移置到“共同的一”之中。立法的任务在于把每个就其自身来说是完美的、孤独的整体的个体转变为一个更庞大的整体的一部分,而个体只有在这一更庞大的整体中才能获得其生命和存在。这种情感的或存在感的共同体的塑造,依赖于饱含旋律的、音乐式的立法语言。

关键词：立法语言音乐模仿

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淋巴结静脉重塑致隐股交界高位结扎术后静脉曲张复发一例

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中华血管外科杂志 2024年第3期9卷 215-216页

作者：孔宣柱付鸿江房品言韩立菊郭俊莹冯玉召李学东天津大学附属泰达国际心血管病医院血管外科天津300457 天津大学附属泰达国际心血管病医院放射科天津300457

本文报道了1例静脉曲张传统高位结扎剥脱术后复发的老年女性病例, 经超声评估及双下肢CT静脉造影检查明确其反流模式为股静脉-淋巴结静脉-前副隐静脉, 术中离断淋巴结静脉与前副隐静脉的交通, 近心端游离至前副隐静脉主干残端, 并点式... 详细信息

本文报道了1例静脉曲张传统高位结扎剥脱术后复发的老年女性病例, 经超声评估及双下肢CT静脉造影检查明确其反流模式为股静脉-淋巴结静脉-前副隐静脉, 术中离断淋巴结静脉与前副隐静脉的交通, 近心端游离至前副隐静脉主干残端, 并点式剥脱出大腿段扭曲的前副隐静脉主干及其交通支, 术后第二天患者好转出院。

关键词：淋巴结静脉高位结扎剥脱静脉曲张复发

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Advances in research and utilization of botanical pesticides for agricultural pest management in Inner Mongolia, China

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Chinese Herbal Medicines 2024年第2期16卷 248-262页

作者： Chunyan guo Lingfei Wang Namuhan Chen Mingxu Zhang junying Jia Lijuan Lv Minhui Li College of Pharmacy Qiqihar Medical UniversityQiqihar 161000China Department of Basic Science Tianjin Agricultural UniversityTianjin 300384China Inner Mongolia Autonomous Region Hospital of Traditional Chinese Medicine Hohhot 010110China Inner Mongolia Academy of Chinese and Mongolian Medicine Hohhot 010010China University Engineering Research Center of Chinese(Mongolia)Ecological Planting Medicinal Materials(Nurture)in Inner Mongolia Autonomous Region Inner Mongolia Minzu UniversityTongliao 028000China Baotou Medical College Baotou 014060China Naiman Banner Medicinal Materials Research and Development Center Tongliao 028300China

Traditional Chinese herbal medicines not only cure human diseases,but also play an important role as *** with conventional chemical agents,traditional Chinese herbal medicines are characterized by low toxicity,low residues,and being eco-friendly,and they have become a research *** Chinese herbal medicines have tremendous flexibility and indefinite ***,this paper reviewed the types of insecticides belonging to traditional Chinese herbal medicines in Inner Mongolia,China,including their traditional uses,secondary metabolites,biological activities,action mechanisms,application methods,and development *** addition,the most relevant issues involved in the development of traditional Chinese herbal medicines was *** believe that traditional Chinese herbal medicines can be better implemented and developed;such that its other advantages,such as an insect repellent,can be ***,this study lays a solid foundation for further research on traditional Chinese herbal medicines in Inner Mongolia,China.

关键词： botanical pesticides organic agriculture pest management plant-derived biological products secondary metabolites

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SIA-IgG confers poor prognosis and represents a novel therapeutic target in epithelial ovarian cancer

SIA-IgG confers poor prognosis and represents a novel therap...

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第十四届全国免疫学学术大会

作者： Qinyuan Liao junying guo Jinhua Zheng Man Zhang Guilin Medical University 桂林医学院附属医院

Epithelial ovarian cancer(EOC) remains one of the leading causes of cancer-related deaths in female,drug resistance and metastasis is the primary cause for mortality in this ***,the existing markers of EOC possess very limited clinical relevance and there has been no real progress in the rate of ***,novel treatment approaches,therapies,and better prognostic and predictive biomarkers are urgently *** previous study has demonstrated that cancer-derived sialylated IgG(SIA-IgG) is highly expressed in kinds of cancer cells with stem/progenitor features,and critically involved in proliferation,occurrence,and metastasis of *** this study,we firstly explored the expression of SIA-IgG in kinds of benign and malignant ovarian tumors,and found the positive signals was mainly expressed in *** we investigated the relationship of SIA-IgG expression with clinicopathological characteristics and overall survival data of ovarian carcinoma patients,and the data confirmed the expression of SIA-IgG confers poor prognosis of ovarian ***,SIA-IgG knockdown ovarian cancer cells reduced proliferation,metastasis and invasion ability and increased apoptosis of cancer ***’s more,by using a monoclonal antibody which specifically against SIA-Ig G,we to rgeted SIA-IgG on the surface of ovarian cancer *** results of cell experiments in vitro and in vivo suggested SIA-IgG to be a promising therapeutic target in epithelial ovarian *** study provides a potential prognostic marker and a novel therapeutic target for epithelial ovarian cancer.

关键词： SIA-IgG epithelial ovarian cancer prognosis therapeutic target

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