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Computer Modeling in engineering & Sciences 2024年第8期140卷 2053-2077页

作者： Ruijin Huo Qingxiang Pei Xiaohui Yuan Yanming Xu College of Architecture and Civil engineering Xinyang Normal UniversityXinyang464000China Henan Unsaturated Soil and Special Soil engineering Technology Research Center Xinyang Normal UniversityXinyang464000China Henan International Joint Laboratory of structural Mechanics and Computational Simulation College of Architecture and Civil EngineeringHuanghuai UniversityZhumadian463000China

In this paper,a generalized nth-order perturbation method based on the isogeometric boundary element method is proposed for the uncertainty analysis of broadband structural acoustic scattering *** Burton-Miller method is employed to solve the problem of non-unique solutions that may be encountered in the external acoustic field,and the nth-order discretization formulation of the boundary integral equation is *** addition,the computation of loop subdivision surfaces and the subdivision rules are *** order to confirm the effectiveness of the algorithm,the computed results are contrasted and analyzed with the results under Monte Carlo simulations(MCs)through several numerical examples.

关键词： Perturbation method loop subdivision surface isogeometric boundary element method uncertainty analysis

Shear Strength Evaluation of Concrete Beams Reinforced with BFRP Bars and Steel Fibers without Stirrups

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Computers, Materials & Continua 2016年第2期51卷 81-103页

作者： Smitha Gopinath S.Meenu A.Ramachandra Murthy Scientist.CSIR-structural engineering Research Centre Chennai 600113India Project student CSIR-Structural Engineering Research CentreChennai 600113India

This paper presents experimental and analytical investigations on concrete beams reinforced with basalt fiber reinforced polymer(BFRP)and steel fibers without *** behaviour of BFRP reinforced beams and steel fiber reinforced beams were evaluated and the effect of combining BFRP bars and steel fiber was investigated in *** is found that combining s teel fibers with BFRP could change the shear failure of BFRP reinforced beam to flexural ***,the existing analytical models were reviewed and compared to predict the shear strength of both FRP reinforced and steel fiber reinforced *** on the review,the appropriate model was chosen and modified to predict the shear strength of BFRP reinforced beam along with steel fibers.

关键词： Basalt fiber reinforced polymer(BFRP) Steel fibers Flexure,Shear strength

Proposed numerical and machine learning models for fiber-reinforced polymer concrete-steel hollow and solid elliptical columns

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Frontiers of structural and Civil engineering 2024年第8期18卷 1169-1194页

作者： Tang QIONG Ishan JHA Alireza BAHRAMI Haytham F.ISLEEM Rakesh KUMAR Pijush SAMUI School of Applied Technologies Qujing Normal UniversityQujing 655011China Department of Civil engineering Indian Institute of Technology-BHUVaranasi 221005India Department of Building engineering Energy Systems and Sustainability ScienceFaculty of Engineering and Sustainable DevelopmentUniversity of GävleGävle 80176Sweden Department of Civil engineering National Institute of Technology-PatnaPatna 800005India

This study employs a hybrid approach,integrating finite element method(FEM)simulations with machine learning(ML)techniques to investigate the structural performance of double-skin tubular columns(DSTCs)reinforced with glass fiber-reinforced polymer(GFRP).The investigation involves a comprehensive examination of critical parameters,including aspect ratio,concrete strength,number of GFRP confinement layers,and dimensions of steel tubes used in DSTCs,through comparative analyses and parametric *** ensure the credibility of the findings,the results are rigorously validated against experimental data,establishing the precision and trustworthiness of the *** present research work examines the use of the columns with elliptical cross-sections and contributes valuable insights into the application of FEM and ML in the design and evaluation of structural systems within the field of structural engineering.

关键词： elliptical column fiber-reinforced polymer machine learning finite element method ABAQUS

Feature Selection Using Tree Model and Classification Through Convolutional Neural Network for structural Damage Detection

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Acta Mechanica Solida Sinica 2024年第3期37卷 498-518页

作者： Zihan Jin Jiqiao Zhang Qianpeng He Silang Zhu Tianlong Ouyang Gongfa Chen School of Civil and Transportation engineering Guangdong University of TechnologyGuangzhou510006China Guangdong Tianxin Electric Power engineering Testing Co. LtdGuangzhou510663China

structural damage detection(SDD)remains highly challenging,due to the difficulty in selecting the optimal damage features from a vast amount of *** this study,a tree model-based method using decision tree and random forest was employed for feature selection of vibration response signals in *** datasets were obtained by numerical experiments and vibration experiments,*** features extracted using this method were input into a convolutional neural network to determine the location of structural *** indicated a 5%to 10%improvement in detection accuracy compared to using original datasets without feature selection,demonstrating the feasibility of this *** proposed method,based on tree model and classification,addresses the issue of extracting effective information from numerous vibration response signals in structural health monitoring.

关键词： Feature selection structural damage detection Decision tree Random forest Convolutional neural network

Emerging WS_(2)/WSe_(2)@graphene nanocomposites: synthesis and electrochemical energy storage applications

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Rare Metals 2024年第1期43卷 1-19页

作者： Yu-Meng Gao Yong Liu Kai-Jia Feng Jun-Qing Ma Ying-Jie Miao Bin-Rui Xu Kun-Ming Pan Osaka Akiyoshi Guang-Xin Wang Ke-Ke Zhang Qiao-Bao Zhang National Joint engineering Research Center for Abrasion Control and Molding of Metal Materials Henan Key Laboratory of Non-Ferrous Materials Science and Processing TechnologySchool of Materials Science and EngineeringHenan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co-Construction of Collaborative School of Electrical engineering Henan University of Science and TechnologyLuoyang 471023China Biomaterials Laboratory Faculty of EngineeringOkayama UniversityTsushima-NakeOkayama-Shi 700-8530Japan Department of Materials Science and engineering College of MaterialsXiamen UniversityXiamen 361005China Fujian Key Laboratory of Surface and Interface engineering for High Performance Materials Xiamen UniversityXiamen 361005China

In recent years, tungsten disulfide(WS_(2)) and tungsten selenide(WSe_(2)) have emerged as favorable electrode materials because of their high theoretical capacity, large interlayer spacing, and high chemical activity;nevertheless, they have relatively low electronic conductivity and undergo large volume expansion during cycling, which greatly hinder them in practical applications. These drawbacks are addressed by combining a superior type of carbon material, graphene, with WS_(2) and WSe_(2) to form a WS_(2)/WSe_(2)@graphene *** materials have received considerable attention in electro-chemical energy storage applications such as lithium-ion batteries(LIBs), sodium-ion batteries(SIBs),and supercapacitors. Considering the rapidly growing research enthusiasm on this topic over the past several years, here the recent progress of WS_(2)/WSe_(2)@graphene nanocomposites in electrochemical energy storage applications is summarized. Furthermore, various methods for the synthesis of WS_(2)/WSe_(2)@graphene nanocomposites are reported and the relationships among these methods, nano/microstructures, and electrochemical performance are systematically summarized and discussed. In addition, the challenges and prospects for the future study and application of WS_(2)/WSe_(2)@graphene nanocomposites in electrochemical energy storage applications are proposed.

关键词： WS_(2)/WSe_(2)@graphene nanocomposites Liion batteries(LIBs) Na-ion batteries(SIBs) Supercapacitors Electrochemical performance

Potential applications of 7 Tesla magnetic resonance imaging in paediatric neuroimaging:Feasibility and challenges

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World Journal of Clinical Pediatrics 2024年第2期13卷 1-6页

作者： Arosh S Perera Molligoda Arachchige Letterio S Politi Final Year Medical student Faculty of MedicineHumanitas UniversityPieve Emanuele 20089Italy Department of Neuroradiology IRCCS Humanitas Research HospitalRozzano 20089MilanItaly Department of Biomedical Sciences Humanitas UniversityPieve Emanuele 20072MilanItaly

The integration of 7 Tesla magnetic resonance imaging(7 T MRI)in adult patients has marked a revolutionary stride in *** this article we explore the feasibility of 7 T MRI in paediatric practice,emphasizing its feasibility,applications,challenges,and safety *** heightened resolution and tissue contrast of 7 T MRI offer unprecedented diagnostic accuracy,particularly in *** range from neuro-oncology to neonatal brain imaging,showcasing its efficacy in detecting subtle structural abnormalities and providing enhanced insights into neurological *** the promise,challenges such as high cost,discomfort,and safety concerns necessitate careful *** suggests that,with precautions,7 T MRI is feasible in paediatrics,yet ongoing studies and safety assessments are imperative.

关键词： 7 Tesla magnetic resonance imaging Pediatric imaging Feasibility Challenges

An attention-based teacher-student model for multivariate short-term landslide displacement prediction incorporating weather forecast data

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Journal of Mountain Science 2024年第8期21卷 2739-2753页

作者： CHEN Jun HU Wang ZHANG Yu QIU Hongzhi WANG Renchao Sichuan Artificial Intelligence Research Institute Yibin 644000China School of Computer Science and engineering University of Electronic Science and Technology of ChinaChengdu 611731China School of Architecture and Civil engineering Chengdu UniversityChengdu 610106China

Predicting the displacement of landslide is of utmost practical importance as the landslide can pose serious threats to both human life and ***,traditional methods have the limitation of random selection in sliding window selection and seldom incorporate weather forecast data for displacement prediction,while a single structural model cannot handle input sequences of different lengths at the same *** order to solve these limitations,in this study,a new approach is proposed that utilizes weather forecast data and incorporates the maximum information coefficient(MIC),long short-term memory network(LSTM),and attention mechanism to establish a teacher-student coupling model with parallel structure for short-term landslide displacement *** MIC,a suitable input sequence length is selected for the LSTM *** investigate the influence of rainfall on landslides during different seasons,a parallel teacher-student coupling model is developed that is able to learn sequential information from various time series of different *** teacher model learns sequence information from rainfall intensity time series while incorporating reliable short-term weather forecast data from platforms such as China Meteorological Administration(CMA)and Reliable Prognosis(https://***)to improve the model’s expression capability,and the student model learns sequence information from other time *** attention module is then designed to integrate different sequence information to derive a context vector,representing seasonal temporal attention ***,the predicted displacement is obtained through a linear *** proposed method demonstrates superior prediction accuracies,surpassing those of the support vector machine(SVM),LSTM,recurrent neural network(RNN),temporal convolutional network(TCN),and LSTM-Attention *** achieves a mean absolute error(MAE)of 0.072 mm,root mean square error(RMSE)of 0.096 mm,and pearson correlation coefficients(PC

关键词： Landslide prediction MIC LSTM Attention mechanism Teacher student model Prediction stability and interpretability

Role of architectural space in blast-resistant buildings

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Frontiers of Architectural Research 2013年第1期2卷 67-73页

作者： Mahdi Bitarafan Sayed Bagher Hosseini Sayed Javad hashemi-fesharaki Armin Esmailzadeh Department of Civil engineering Engineering Research Institution of Natural Disaster Shakhes Pajouh Isfahan Iran School of Architecture and Environmental Design Iran University of Science and Technology Tehran Iran Department of Passive Defense University of Imam-Hossein Tehran Iran msc student at structural engineering Faculty of Engineering Central Tehran Branch Azad University (IAUCTB) Tehran Iran

The design of all spatial scares in a manufactured environment is part of the architectural skills and knowtedge. Therefore, an architectural design should be drafted to reduce the vulnerability of humans and buildings against unexpected events, such as terrorist attacks and bombardments. Human casualties and equipment destruction inside the buitdings coutd be prevented by designing a suitabte architectural space. This study addresses the absence of a codified and detaited criterion to evatuate architecturat spaces and their design. Hence, art proposed indices for architectural spaces have been extracted using the ideas of experts in the field of architecture and exptosives. Questionnaires were presented to 25 experts to weigh the effective indices using the anatytic hierarchy process method. The human-oriented （ergonomic） characteristics of the buitding space is found to be the most important factor in facilitating crisis management, followed by the Location of criticat spaces.

关键词： Architectural space Building Explosion Index

Protective effect of co-enzyme Q10 on testicular tissue and sperm parameters in adult male rats treated with Sunset Yellow FCF

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Asian pacific Journal of Reproduction 2024年第2期13卷 80-88页

作者： Rohollah Nazari Somayeh Akbari Maryam Naseh Shayan Yousufzai Seyede Fatemeh Hosseini Fatemeh Karimi Histomorphometry and Stereology Research Center Shiraz University of Medical SciencesShirazIran Anatomy Department School of MedicineShiraz University of Medical SciencesShirazIran student Research Committee Medical SchoolShiraz University of Medical SciencesShirazIran Faculty of Tabas School of NursingBirjand University of Medical SciencesBirjandIran

Objective:To determine the protective effect of co-enzyme Q10(CoQ10)on testicular tissue and sperm parameters in male rats treated with SunsetYellow ***:Sixty male Sprague-Dawley rats were randomly divided into 6 groups of the control,CoQ10(10 mg/kg/day),low dose of Sunset Yellow(2.5 mg/kg),high dose of Sunset Yellow(70 mg/kg),low dose of Sunset Yellow(2.5 mg/kg)plus CoQ10,and high dose of Sunset Yellow(70 mg/kg)plus *** drugs were administered via daily oral gavages for 6 *** the end of the experiment,sperm analysis,stereological and histological assessments of the testis were carried ***:The normal morphology(by 41.1%)and progressive spermatozoa(by 74.8%),testicle volume(by 33.4%),lumen volume(by 38.3%),interstitial tissue volume(by 44.7%),seminiferous tubule volume(by 40.7%),and number of spermatogonia(by 53.9%)and Leydig cells(by 70.7%)reduced in the rats that received high doses of Sunset Yellow in comparison to the control ***,all these alterations were recovered by CoQ10 treatment in the CoQ10 plus high dose of Sunset Yellow ***,low doses of Sunset Yellow did not affect different parameters of the testis and ***:CoQ10 could,to some extent,prevent structural changes of the testis induced by the high dose of SunsetYellow.

关键词： Sunset Yellow FCF Co-enzyme Q10 Testicle Sperm Stereology

PGA and structural dynamics input motion at a given site

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Earthquake engineering and engineering Vibration 2003年第1期2卷 25-34页

作者： Fabio Casciati Sara Casciati Alberto Marcellini Dept.of structural Mechanics University of Pavia27100 PaviaItaly Professor Dept.of structural Mechanics University of Pavia27100 PaviaItaly Ph.D.Student CNR-IDPA 20133 MilanoItaly Research Director

The computation of the representative ground motions,to be used as input for the dynamic analyses of a struc- ture at a particular site,can be approached by several *** choice of the approach depends on two factors:the da- ta available and the type of problem to be *** paper reports the experience of the authors in approaching a specific case study:the Southern Memnon Colossus,located in Luxor,*** results are of interest when the hazard analysis estimation in developing countries and the safeguard of cultural heritage are *** have to be treated as important structures,due to their historical and economical ***,standard procedures of probabilistic seismic haz- ard analysis for the seismic classification of common buildings have to be *** the other hand,the consequences of the collapse of a monument are not comparable to those related to structures such as nuclear power plants and large dams, for which the deterministic seismic hazard analysis provides a straightforward framework for evaluation of the worst case ground ***'intermediate'approach,which requites a lower amount of input data with respect to the deterministic one,is *** stochastic component can eapture significant eharacteristics of earthquakes,primarily the frequency contents which depend on the magnitude(often referred to as the earthquake scaling law).

关键词： accelerograms hazard analysis site effects structural dynamics