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Frontiers of Structural and Civil Engineering 2023年第10期17卷 1517-1534页

作者： Xiaoqing ZHAO Jinchang WANG panpan guo Xiaonan GONG Yongle DUAN Research Center of Coastal and Urban Geotechnical Engineering Zhejiang UniversityHangzhou 310058China Institute of Transportation Engineering Zhejiang UniversityHangzhou 310058China College of Civil Engineering Hefei University of TechnologyHefei 230009China China North Industries Norengeo Ltd. Shijiazhuang 050051China

A novel anchorage for long-span suspension bridges,called pile-caisson composite structures,was recently proposed by the authors in an attempt to reduce the construction period and *** study aims to investigate the displacement and force behavior of piles in a pile-caisson composite structure under eccentric inclined loading considering different stratum *** this end,both 1g model tests and three-dimensional numerical simulations were *** groups of 1g model tests were used to validate the finite-element(FE)*** studies were then performed to investigate the effects of groundwater level,burial depth of the pile-caisson composite structure,and distribution of soil layers on the performance of the pile-caisson composite *** numerical analyses indicated that the influence of the groundwater level on the stability of the caisson was much greater than that of the *** addition,increasing the burial depth of the pile-caisson composite structure can assist in reducing the displacements and improving the stability of the pile-caisson composite *** addition,the distribution of soil layers can significantly affect the stability of the pile-caisson composite structure,especially the soil layer around the caisson.

关键词： composite structure piles foundation suspension bridge 1g model test finite-element analysis

In-situ Monitoring the Setting Behavior of Foamed Concrete Using Ultrasonic Pulse Velocity Method

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1146-1154页

作者： SHE Wei ZHANG Yunsheng JONES MR guo panpan Jiangsu Key laboratory for Construction Materials Southeast University Concrete Technology Unit Division of Civil EngineeringUniversity of Dundee

The applicability of ultrasonic pulse velocity （UPV） method to in-situ monitor setting and hardening process of foamed concrete （FC） was systematically investigated. The UPVs of various FC pastes were automatically and continuously measured by a specially designed ultrasonic monitoring apparatus （UMA）. Ultrasonic tests were performed on FC mixtures with different density （300, 500, 800 and 1 000 kg/m3）, and different fly ash contents （0%, 20%, 40% and 60%）. The influence of curing temperatures （20, 40, 60 and 80~C） was also studied. The experimental results show that three characteristic stages can be clearly identified during the setting process of an arbitrary FC paste： dormant stage, acceleration stage, and deceleration stage. Wet density, fly ash content, and curing temperature have great impact on setting behavior. A stepwise increase of the wet density results in shorter dormant stage and larger final UPV. Hydration reaction rate is obviously promoted with an increase in curing temperature. However, the addition fly ash retards the microstn,lcture formation. To aid in comparing with the ultrasonic results, the consistence spread test and Vicat needle test （VNT） were also conducted. A correlation between ultrasonic and VNT results was also established to evaluate the initial and final setting time of the FC mixtures. Finally, certain ranges of UPV with reasonable widths were suggested for the initial and final setting time, respectively.

关键词： foamed concrete (FC) early age setting behavior ultrasonic monitoring setting time consistence

Predicting triaxial compressive strength of high-temperature treated rock using machine learning techniques

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第8期15卷 2072-2082页

作者： Xunjian Hu Junjie Shentu Ni Xie Yujie Huang Gang Lei Haibo Hu panpan guo Xiaonan Gong Research Center of Coastal and Urban Geotechnical Engineering Zhejiang UniversityHangzhou310058China Faculty of Engineering China University of Geosciences(Wuhan)Wuhan430074China School of Mechanical Engineering North University of ChinaTaiyuan030051China Beijing Urban Construction Design and Development Group Co. Ltd.Beijing100037China

The accurate prediction of the strength of rocks after high-temperature treatment is important for the safety maintenance of rock in deep underground *** machine learning(ML)techniques were adopted in this study,*** propagation neural network(BPNN),AdaBoost-based classification and regression tree(AdaBoost-CART),support vector machine(SVM),K-nearest neighbor(KNN),and radial basis function neural network(RBFNN).A total of 351 data points with seven input parameters(*** and height of specimen,density,temperature,confining pressure,crack damage stress and elastic modulus)and one output parameter(triaxial compressive strength)were *** root mean square error(RMSE),mean absolute error(MAE)and correlation coefficient(R)were used to evaluate the prediction performance of the five ML *** results demonstrated that the BPNN shows a better prediction performance than the other models with RMSE,MAE and R values on the testing dataset of 15.4 MPa,11.03 MPa and 0.9921,*** results indicated that the ML techniques are effective for accurately predicting the triaxial compressive strength of rocks after different high-temperature treatments.

关键词： Machine learning(ML) Triaxial compressive strength Temperature Confining pressure Crack damage stress

Visual Analysis of Literature about Curcumin and Diabetes Based on Web of Science

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Medicinal Plant 2022年第2期13卷 58-62页

作者： panpan guo Ting HAN Tenth People's Hospital of Tongji University Shanghai 200072China Shanghai Clinical Nutrition Quality Control Center Shanghai 200072China

[Objectives]To analyze the current research situation,hotspots and trends of curcumin and diabetes in recent 10 years.[Methods]Web of Science database was set as data source,the annual number of papers,the distribution of authors,the distribution of country/institution,the distribution of journals,the distribution of key words in the literature about curcumin and diabetes from January 1,2010 to March 31,2021 were quantitatively and visually analyzed with the aid of visualization software Bibliometrix.[Results]A total of 475 articles were included,and the annual number of papers was on the rise;the top three high-yielding countries were China(120 papers),India(65 papers),and the United States(58 papers).In terms of international cooperation,China and the United States had the most cooperation(27 papers);the top three high-yielding institutions were Wenzhou Medical University(42 papers),Mashhad University of Medical Sciences(41 papers)and Tehran University of Medical Sciences(30 papers);the most frequently cited authors were Wang Y(19 times),Li X(13 times),Li Y(12 times),Liang G(12 times)and Zhang Y(12 times);the top three journals in number of papers were Diabetology&Metabolic Syndrome(8 papers),PLoS One(8 papers),and European Journal of Pharmacology(7 papers),and the h index was 7,8,and 6,respectively;the most frequently cited journals were Diabetes(496 times),Journal of Biological Chemistry(486 times),PLoS One(347 times),Diabetes Care(284 times),and European Journal of Pharmacology(229 times);the most frequent key words mainly included oxidative stress,curcumin,insulin-resistance and expression;the hotspots were insulin resistance and NF-κB,mainly focusing on in vitro experiments.[Conclusions]The curcumin has good therapeutic potential in improving insulin resistance,inhibiting inflammation and oxidative stress,*** results are expected provide a reference and basis for scientific researchers to understand the current situation of curcumin and diabetes research

关键词： Curcumin Diabetes Bibliometrix Bibliometrics Web of Science Visual analysis

Optimal delay for triple-phase hepatic computed tomography using a bolustracking technique in cats

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Animal Diseases 2022年第2期2卷 100-108页

作者： Bin Li Mingli Ren Mahmoud M.Abouelfetouh panpan guo Ming Xing Ding Diqi Yang Yanqing Wu Yi Ding College of Veterinary Medicine Huazhong Agricultural UniversityWuhanHubei Province 430070P.R.China College of Veterinary Medicine Benha UniversityMoshtohorEgypt

The objective of this study was to provide the characteristics of hepatic computed tomography images and optimize their transition delay with a bolus-tracking technique for triple-phase hepatic computed tomography in *** triple-phase computed tomography was performed in nine healthy *** upper third of the liver was dynamically scanned every 0.5 s for 40 *** time density curves of the aorta and hepatic parenchyma mean enhancement were ***-phase hepatic computed tomography was performed three times with a bolus trigger of 200 Hounsfield units of aortic *** transition delays of the arterial,portal,and hepatic parenchymal phases were respectively 0,5 and 60 s in the first scan;2,7 and 62 s in the second scan;and 4,9 and 64 s in the third *** computed tomography images were evaluated by a certificated *** arterial vessels and their main branches were well enhanced at a 2 s transition *** contrast of the portal vein to the liver parenchyma was most obvious at a 7 s transition *** mean enhancement of the hepatic parenchyma peaked at a 62 s transition delay,whereas the degree of enhancement of the hepatic vasculature *** this study,the recommended transition delays for the arterial,portal,and hepatic parenchymal phases were 2 s,7 s and 62 s,respectively,after triggering at 200 Hounsfield units of aortic *** information may be helpful in diagnosing feline liver diseases and provides a key reference for the clinical implementation of CT.

关键词： Bolus-tracking CT Feline Liver Triple-phase

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恐怖袭击下地铁隧道结构爆炸响应与防护对策

北京理工大学学报 2023年第6期43卷 549-564页

作者：高金金郭盼盼马晶晶汪亦显中国工程院战略咨询中心北京100088 合肥工业大学土木与水利工程学院安徽合肥230009 合肥市轨道交通集团有限公司安徽合肥230601

探讨了恐怖袭击下地铁隧道结构爆炸响应的研究手段、地铁隧道结构的运动与内力响应、毁伤效应以及恐怖爆炸防护对策.研究发现,管片接头对隧道结构刚度和整体性的弱化效应是导致地铁隧道结构的位移、速度、加速度和主应力响应强于整体现... 详细信息

探讨了恐怖袭击下地铁隧道结构爆炸响应的研究手段、地铁隧道结构的运动与内力响应、毁伤效应以及恐怖爆炸防护对策.研究发现,管片接头对隧道结构刚度和整体性的弱化效应是导致地铁隧道结构的位移、速度、加速度和主应力响应强于整体现浇隧道结构的根本原因.炸药与隧道结构底部的距离越小,隧道结构的位移响应越明显.炸药当量增大不仅提高了隧道结构的峰值加速度,而且改变了隧道结构拱腰处峰值加速度的方向.地铁隧道恐怖爆炸防护应从降低恐怖爆炸事故发生概率以及降低恐怖爆炸事故危害两个方面进行开展.非对称多爆源同步和非同步起爆工况下的地铁隧道结构爆炸响应研究以及基于数值分析和机器学习算法预测的简明实用设计公式的构建是值得重视的未来研究方向.

关键词：恐怖袭击爆炸地铁隧道防爆结构动力响应

一类具比例时滞细胞神经网络的全局渐近稳定性

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黑龙江大学自然科学学报 2016年第4期33卷 438-443页

作者：郭盼盼周立群天津师范大学数学科学学院天津300387

研究一类具比例时滞细胞神经网络的全局渐近稳定性问题。通过一个非线性变换,将具比例时滞细胞神经网络等价变换成一类具常时滞变系数的细胞神经网络;通过同胚映射理论和构造合适的Lyapunov泛函,得到平衡点存在唯一且全局渐近稳定的充... 详细信息

研究一类具比例时滞细胞神经网络的全局渐近稳定性问题。通过一个非线性变换,将具比例时滞细胞神经网络等价变换成一类具常时滞变系数的细胞神经网络;通过同胚映射理论和构造合适的Lyapunov泛函,得到平衡点存在唯一且全局渐近稳定的充分条件。数值算例及仿真结果验证了所得结果的正确性。

关键词：细胞神经网络比例时滞全局渐近稳定性 Lyapunov泛函

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高温高压下带电胶体颗粒热泳特性分析

武汉理工大学学报（交通科学与工程版） 2023年第3期47卷 454-459页

作者：周懿尹世杰杨洋郭盼盼武汉理工大学船海与能源动力工程学院武汉430063 南京航空航天大学通用航空与飞行学院南京210016 西安交通大学能源与动力工程学院西安710049

文中以高温高压条件下带电胶体颗粒在水溶液中的热泳为研究对象,基于能量守恒方程、泊松方程、能斯特-普朗克方程、连续性方程和斯托克斯方程建立仿真模型.结果表明:高温高压条件加速颗粒在水溶液中的热泳.当双电层相对于颗粒半径较厚时... 详细信息

文中以高温高压条件下带电胶体颗粒在水溶液中的热泳为研究对象,基于能量守恒方程、泊松方程、能斯特-普朗克方程、连续性方程和斯托克斯方程建立仿真模型.结果表明:高温高压条件加速颗粒在水溶液中的热泳.当双电层相对于颗粒半径较厚时,双电层形变为主要因素,较高温度可增大热泳系数;当双电层较薄时,热电效应为主要因素,温度的上升反而减小热泳系数.若颗粒热导率远高于水溶液热导率,由此形成的非线性温度场会严重削弱双电层较薄时的颗粒热泳.

关键词：纳米流体高温高压条件双电层热泳热泳系数

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江苏省大学新生体质健康状况、影响因素及应对策略研究

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苏州市职业大学学报 2022年第3期33卷 88-92页

作者：郭盼盼徐州幼儿师范高等专科学校体育学院江苏徐州221004

大学新生体质健康是衔接青少年和成年人体质健康的关键环节。研究认为,江苏省大学新生体质健康虽然有所改善,但总体状况仍然不够理想。影响江苏省大学新生体质健康的因素包括:营养条件的改善和交通舒适化造成学生能量积累大于消耗;繁重... 详细信息

大学新生体质健康是衔接青少年和成年人体质健康的关键环节。研究认为,江苏省大学新生体质健康虽然有所改善,但总体状况仍然不够理想。影响江苏省大学新生体质健康的因素包括:营养条件的改善和交通舒适化造成学生能量积累大于消耗;繁重的学业任务和安逸化的放松方式使得学生体育参与不足;学校体育和家庭体育的不作为影响学生体育习惯养成。据此提出相应的应对策略:从不同层面推进青少年饮食结构的营养均衡;在学校、社区和公共交通层面优化青少年的健身环境;通过多重合作方式来提升青少年学习效率,节约学习时间;进一步丰富学校体育课程资源,形成常态化的课内外活动机制;进一步深化开展家庭和社区体育,丰富周末闲暇健身活动。

关键词：江苏省大学新生身体素质影响因素

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一种滚动轴承早期故障特征提取方法

噪声与振动控制 2023年第6期43卷 95-100,156页

作者：崔奔张文斌郭盼盼昆明理工大学机电工程学院昆明650500 红河学院工学院云南省高校高原机械性能分析与优化省重点实验室云南蒙自661199

针对滚动轴承早期故障受噪声污染大,故障特征频率难以提取而导致的故障诊断困难问题,提出一种新的滚动轴承早期故障特征提取方法。首先利用泰尔指数(Theil Index,TI)对滚动轴承进行健康状态评估,并检测出状态异常的信号;然后对异常信号... 详细信息

针对滚动轴承早期故障受噪声污染大,故障特征频率难以提取而导致的故障诊断困难问题,提出一种新的滚动轴承早期故障特征提取方法。首先利用泰尔指数(Theil Index,TI)对滚动轴承进行健康状态评估,并检测出状态异常的信号;然后对异常信号进行奇异谱分解(Singular Spectrum Decomposition,SSD)得到若干分量,以方差贡献度为标准筛选出最佳分量;最后通过蜜獾算法(Honey Badger Algorithm,HBA)优化的最大相关峭度解卷积(Maximum Correlated Kurtosis Deconvolution,MCKD)对最佳分量进行降噪处理,并对降噪处理后的信号进行包络解调分析提取出故障特征频率。通过两个数据集的分析,验证所提方法的有效性。

关键词：故障诊断泰尔指数奇异谱分解蜜獾算法最大相关峭度解卷积滚动轴承