检索结果-南通市图书馆

Machine learning-enhanced Monte Carlo and subset simulations for advanced risk assessment in transportation infrastructure

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain science 2024年第2期21卷 690-717页

作者： Furquan ahmad Pijush sAMUI s.s.MIsHRA Department of Civil Engineering National Institute of TechnologyPatna 800006India

The maintenance of safety and dependability in rail and road embankments is of utmost importance in order to facilitate the smooth operation of transportation *** study introduces.a comprehensive methodology for soil slope s.ability evaluation,employing Monte Carlo simulation(MCs.and subset simulation(ss)with the"UPss 3.0 Add-in"in *** on an 11.693-meter embankment with a soil slope(inclination ratio of 2H:1V),the investigation considers earthquake coefficients(kh)and pore water pressure ratios(ru)following Indian zoning *** chance of slope failure showed a considerable increase as the Coefficient of Variation(COV),seismic coefficients(kh),and pore water pressure ratios(ru)experienced an *** ss.approach showed exceptional efficacy in calculating odds of failure that are notably *** computational modeling,the study optimized the worst-case scenario using ANFIs-GA,ANFIs-GWO,ANFIs-PsO,and ANFIs-BBO *** ANFIs-PsO model exhibits exceptional accuracy(training R2=0.9011,RMsE=0.0549;testing R2=0.8968,RMsE=0.0615),emerging as the most *** study highlights the significance of conducting thorough risk assessments.and offers practical insights into evaluating and improving the s.ability of soil slopes in transportation *** findings contribute to the enhancement of safety and reliability in real-world situations.

关键词： Monte Carlo simulation subset simulation Machine Learning seismic coefficient

Finite element model updating for structural damage detection using transmissibility data

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2024年第1期23卷 87-101页

作者： ahmad Izadi Akbar Es.andiari Department of Maritime Engineering Amirkabir University of TechnologyTehran 15875-4413Iran

This paper presents.a new finite element model updating method for estimating structural parameters.and detecting structural damage location and severity based on the structural responses(output-only data).The method uses the sensitivity relation of transmissibility data through a least-squares.algorithm and appropriate normalization of the extracted *** proposed transmissibility-based sensitivity equation produces.a more significant number of equations than the sensitivity equations based on the frequency response function(FRF),which can estimate the structural parameters with higher *** abilities of the proposed method are assessed by using numerical data of a two-story two-bay frame model and a plate structure *** evaluating different damage cases,the number,location,and stiffness reduction of the damaged elements.and the severity of the simulated damage have been accurately *** reliability and s.ability of the presented method against measurement and modeling errors.are examined using error-contaminated *** parameter estimation results prove the method’s capabilities.as.an accurate model updating algorithm.

关键词： damage detection model updating output-only transmissibility sensitivity equation

Optimizing calcination of coal by-products for maximizing REE leaching recovery and minimizing Al,Ca,and Fe contamination

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第7期42卷 1354-1365,I0006页

作者： Tus.ar Gupta ahmad Nawab Rick Honaker MP Materials Mountain Pass Mine 67750 Bailey RoadMountain PassCA92366USA Department of Mining Engineering University of KentuckyLexingtonKY40506USA

High-temperature calcination is effective in improving the leaching characteristics of rare earth elements(REEs)from conventional REE-bearing minerals by transforming them into more leachable ***,the recovery of contaminants such as.al,Fe,and Ca also increases *** objective of the study was to maximize the REE extraction while minimizing the concentration of contaminant ions.al,Ca,and Fe)in the leach *** density fractions of the coarse refuse from the Baker and Fire Clay s.am coal refuse were pulverized to a top size of 180μm and used as.a feedstock for the *** the samples generated from thermal treatment were leached at 1%(w/v)using 1.2 mol/L sulfuric acid at 75℃ for 2 *** results from a parametric program based on a Box-Behnken design were used for modeling and optimization of three operating parameters.associated with the lab-s.ale calcination *** parameters included temperature(400-800℃),ramp rate(2-10℃/min)and holding time(0-120 min).It was determined that the calcination temperature was the most significant parameter influencing REE *** majority of the heavy rare earth elements(HREEs)were found to be present in an insoluble form in the calcination products.and were marginally affected by thermal treatment.A strong correlation between light rare earth elements recovery(LREEs.and Al suggested a possible association with *** optimum operating conditions for high REE recovery with comparatively lower contaminant concentration for 1.6 specific gravity float and 2.2 sink fractions of Baker and Fire Clay s.am material were determined to be at 776,800℃ and 407,800℃,calcining temperatures,respectively.A higher optimum temperature of 1.6 float fraction of Baker s.am relative to Fire Clay s.am material was due to elevated pyrite concentration in Baker s.am *** treatment at 400℃ converted pyrite into a soluble intermedium iron oxide,resulting in a high Fe content in the ***

关键词： Calcination Optimization Rare earth elements Coal refuse

Twinning aspects.and their efficient roles in wrought Mg alloys.a comprehensive review

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第6期12卷 2201-2230页

作者： s.s.a.s.ah Manping Liu Azim Khan Farooq ahmad M.R.Abdullah Xingquan Zhang shiwei Xu Zhen Peng school of Materials science and Engineering Jiangsu UniversityZhenjiang 212013China school of Mechanical Engineering Anhui University of TechnologyMáanshan 243002China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Twinning is widely recognized as.an effective and cost-efficient method for controlling the microstructure and properties of wrought magnesium(Mg)***,twins play a crucial role in initiating dynamic recrys.allization(DRX),while twin regions experience rapid recrys.allization during s.atic recrys.allization(sRX).The activation of twinning can lead to changes in lattice orientation,significantly impacting the final texture in Mg *** active roles of twinning are influenced by various factors during the activation process.and the mobility of twin boundaries(TB)can be amplified by stress effects,dislocation interactions.and thermal ***,annealing treatments that involve proper segregation or precipitation on TBs serve to s.abilize them,restraining their *** such as segregation may also alter the twinning propensity in Magnesium-rare earth(Mg-RE)***{10–11}contraction twins(CT)and{10–11}-{10–12}double twins(DT)can promote dynamic recrys.allization(DRX),they also pose a risk as potential sources of voids.and ***,unders.anding the nucleation and growth mechanisms of twinning is crucial,and these aspects.are briefly reviewed in this *** the factors mentioned above,this.article summarizes the recent res.arch progress in this field,shedding light on advancements in recent eras.

关键词： Mg alloys Twinning Recrys.allization Texture Mechanical properties

Unlocking the Potential:A Comprehensive systematic Review of ChatGPT in Natural Language Processing Tasks

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & sciences 2024年第10期141卷 43-85页

作者： Ebtesam ahmad Alomari Faculty of Computing and Information Albaha UniversityAlbaha65731Saudi Arabia

As Natural Language Processing(NLP)continues to advance,driven by the emergence of sophisticated large language models such as ChatGPT,there has been a notable growth in res.arch *** rapid uptake reflects increasing interest in the field and induces critical inquiries into ChatGPT’s.applicability in the NLP *** review paper systematically investigates the role of ChatGPT in diverse NLP tasks,including information extraction,Name Entity Recognition(NER),event extraction,relation extraction,Part of speech(Pos)tagging,text classification,sentiment analysis,emotion recognition and text *** novelty of this work lies in its comprehensive analysis of the existing literature,addressing a critical gap in unders.anding ChatGPT’s.adaptability,limitations.and optimal *** this paper,we employed a systematic stepwise approach following the Preferred Reporting Items for systematic Reviews.and Meta-Analyses(PRIs.a)framework to direct our s.arch process.and seek relevant *** review reveals ChatGPT’s significant potential in enhancing various NLP *** adaptability in information extraction tasks,sentiment analysis.and text classification showcases its.ability to comprehend diverse contexts.and extract meaningful ***,ChatGPT’s flexibility in annotation tasks reduces.anual efforts.and accelerates the annotation process,making it a valuable asset in NLP development and ***,GPT-4 and prompt engineering emerge as.a complementary mechanism,empowering users to guide the model and enhance overall *** its promising potential,challenges *** performance of ChatGP Tneeds tobe testedusingmore extensivedatasets.anddiversedata ***,its limitations in handling domain-specific language and the need for fine-tuning in specific applications highlight the importance of further investigations to address these issues.

关键词： Generative AI large languagemodel(LLM) natural language processing(NLP) ChatGPT GPT(generative pretraining transformer) GPT-4 sentiment analysis NER information extraction annotation text classification

Green trading and ecological sus.ainability under macroeconomic policy framework

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第3期15卷 50-66页

作者： Yue Hu Binhui Li Munir ahmad College of science&Technology Ningbo UniversityNingbo 315300ZhejiangChina Donghai Academy Ningbo UniversityNingbo 315211ZhejiangChina Res.arch Center for County Industry Digitization College of Science&TechnologyNingbo UniversityNingbo 315300ZhejiangChina College of International Economics&Trade Ningbo University of Finance and EconomicsNingbo 315175ZhejiangChina “Belt and Road”Bulk Commodity Res.arch Center Ningbo University of Finance and EconomicsNingbo 315175ZhejiangChina

When confronted with ecological challenges,trading ecologically friendly products involving renewable technologies,green management practices.and effluent treatment methods could alleviate ecological degradation on a global s.ale while considering the macroeconomic policy ***,this study determines the effectiveness of fis.al and monetary policy instruments in moderating the relationship between green trade openness(i.e.,trade in environmentally related products.and ecological *** panel quantile regression on data from 20 OECD members from 2003 to 2016,we found that green trade openness supports ecological sus.ainability through a gains-from-trade *** moderation effects,expenditure-driven fis.al expansion reinforces the favorable influence of green trade openness on ecological sus.ainability across ecologically less/moderately efficient economies,while it does the reverse for ecologically more efficient ***-driven fis.al contraction promotes ecological sus.ainability amelioration impact of green trade openness for economies with belowaverage ecological quality and remains neutral for those with average/above-average ecological ***,interest rate-driven monetary contraction proliferates the ecological sus.ainability enhancement effect of green *** suggest that the fis.al and monetary policies demand unambiguous coordination with the OECD’s trade policy structure for optimal environmental outcomes of trading in environmental *** insights would help OECD’s green trade policies gain momentum to facilitate the attainment of the Climate Action agenda of the United Nations’sus.ainable Development Goals.

关键词： Fis.al policy Monetary policy Green trade openness Ecological sus.ainability OECD

Flavonoid Myricetin as Potent Anticancer Agent: A Possibility towards Development of Potential Anticancer Nutraceuticals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2024年第1期30卷 75-84页

作者： Anchal Trivedi Adria Hasan Rumana ahmad sahabjada siddiqui Aditi srivas.ava Aparna Mis.a snober s.Mir Department of Biochemistry Era's Lucknow Medical College&HospitalEra UniversityLucknow(226003)India Molecular Cell Biology Laboratory Integral Information and Research Centre-4(IIRC-4)Department of BioengineeringFaculty of EngineeringIntegral UniversityLucknow(226026)India Department of Biotechnology Era's Lucknow Medical College&HospitalEra UniversityLucknow(226003)India Department of Biosciences Faculty of ScienceIntegral UniversityLucknow(226026)India

Good nutrition plays.a crucial role in maintaining a balanced lifestyle. The beneficial effects of nutrition have been found to counteract nutritional disturbances with the expanded use of nutraceuticals to treat and manage cardiovascular dis.ases, cancer, and other developmental defects over the last decade. Flavonoids.are found abundantly in plant-derived foods such as fruits, vegetables, tea, cocoa, and wine. Fruits.and vegetables contain phytochemicals like flavonoids, phenolics, alkaloids, saponins, and terpenoids. Flavonoids can act as.anti-inflammatory, anti-allergic, anti-microbial(antibacterial, antifungal, and antiviral) antioxidant, anti-cancer, and anti-diarrheal agents. Flavonoids.are also reported to upregulate apoptotic activity in several cancers such as hepatic, pancreatic, breast, esophageal, and colon. Myricetin is.a flavonol which is naturally present in fruits.and vegetables.and has shown possible nutraceutical value. Myricetin has been portrayed as.a potent nutraceutical that may protect against cancer. The focus of the present review is to present an updated account of studies demonstrating the anticancer potential of myricetin and the molecular mechanisms involved therein. A better unders.anding of the molecular mechanism(s) underlying its.anticancer activity would eventually help in its development as.a novel anticancer nutraceutical having minimal side effects.

关键词： myricetin flavonoids anticancer nutraceuticals Chinese medicine Ayurveda complementary and alternative medicine

Impact of metal polluted sewage water on soil nematode assemblages in agricultural settings of Aligarh,India

在线全文

学校读者我要写书评

暂无评论

soil Ecology Letters 2024年第1期6卷 61-75页

作者： Mohammed F.s.a.Ghanem s.ahid Afzal Humira Nesar Zarrin Imran Wasim ahmad Nematode Biodiversity Res.arch Lab Department of ZoologyAligarh Muslim UniversityAligarh 202002India

sewage water in agriculture threatens human health and soil ecosystems through metal *** show promise as bioindicators of soil health due to their abundance and position in soil food ***-polluted water decreased abundance of certain nematode groups.and sigma Maturity *** pollution positively affected nematode groups with r-selected life *** water has been inappropriately used in agriculture,posing possible threats to human health and the soil ecosystems by its constituent pollutants,especially heavy *** evaluation of its influences on soil biomes needs to consider the response of soil *** soil organisms,nematodes.are seen as the best promising candidates for bioindicators of soil *** in,we collected soil samples from fresh water irrigated field from three sites(s1,s2 and s3)and sewage water irrigated dis.ance gradient(5 m-40 m),to assess the influence of metal(Cu,Zn,Cd,Mn,Pb)polluted water on various characteristics of nematode *** results indicated that the heavy metals decreased the abundance of C-p3 nematodes,herbivores.and predatory nematodes.as well as sigma maturity index,whereas,C-p1,C-p2,bacterivore and fungivore nematodes.abundance and diversity positively responded to the metal ***,nematode genera with r-selected life cycle were positively affected and those with K-selected life cycle were negatively affected by metal *** nematode community has potential to be used as indicator of pollution stress in agricultural soils to check soil health and sus.ainability.

关键词： heavy metals sewage irigation agriculture nematodes bioindicators

Novel Framework for an Intrusion Detection system Using Multiple Feature selection Methods Based on Deep Learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua science and Technology 2024年第4期29卷 948-958页

作者： A.E.M.Eljialy Mohammed Yousuf Uddin sultan ahmad Department of Information systems College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlkharjSaudi Arabia Department of Computer science College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlkharjSaudi Arabiaand also with University Center for Research and Development(UCRD)Department of Computer Science and EngineeringChandigarh UniversityPunjabIndia

Intrusion detection systems (IDss) are deployed to detect anomalies in real time. They classify a network’s incoming traffic as benign or anomalous (attack). An efficient and robust IDs in software-defined networks is.an inevitable component of network security. The main challenges of such an IDs.are achieving zero or extremely low false positive rates.and high detection rates. Internet of Things (IoT) networks run by using devices with minimal resources. This situation makes deploying traditional IDss in IoT networks unfeasible. Machine learning (ML) techniques.are extensively applied to build robust IDss. Many res.archers have utilized different ML methods.and techniques to address the above challenges. The development of an efficient IDs s.arts with a good feature selection process to avoid overfitting the ML model. This work proposes.a multiple feature selection process followed by classification. In this study, the software-defined networking (sDN) dataset is used to train and test the proposed model. This model applies multiple feature selection techniques to select high-scoring features from a set of features. Highly relevant features for anomaly detection are selected on the basis of their scores to generate the candidate dataset. Multiple classification algorithms.are applied to the candidate dataset to build models. The proposed model exhibits considerable improvement in the detection of attacks with high accuracy and low false positive rates, even with a few features selected.

关键词： random forest feature selection decision tree software-defined network logistic regression intrusion detection system XGB classifier AdaBoost