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Text Reasoning Chain Extraction for Multi-Hop Question Answering

Tsinghua Science and Technology 2024年第4期29卷 959-970页

作者： Pengming Wang Zijiang Zhu qing Chen Weihuang dai School of Data Science and Artificial Intelligence Wenzhou University of TechnologyWenzhou 325035China School of Computer Science and also with Institute of Intelligent Information ProcessingSouth China Business CollegeGuangdong University of Foreign StudiesGuangzhou 510545China School of Psychology Jiangxi Normal UniversityNanchang 330022China also with School of Science East China Jiaotong UniversityNanchang 330013China Institute of Intelligent Information Processing South China Business CollegeGuangdong University of Foreign StudiesGuangzhou 510545China

With the advent of the information age, it will be more troublesome to search for a lot of relevant knowledge to find the information you need. Text reasoning is a very basic and important part of multi-hop question and answer tasks. This paper aims to study the integrity, uniformity, and speed of computational intelligence inference data capabilities. That is why multi-hop reasoning came into being, but it is still in its infancy, that is, it is far from enough to conduct multi-hop question and answer questions, such as search breadth, process complexity, response speed, comprehensiveness of information, etc. This paper makes a text comparison between traditional information retrieval and computational intelligence through corpus relevancy and other computing methods. The study finds that in the face of multi-hop question and answer reasoning, the reasoning data that traditional retrieval methods lagged behind in intelligence are about 35% worse. It shows that computational intelligence would be more complete, unified, and faster than traditional retrieval methods. This paper also introduces the relevant points of text reasoning and describes the process of the multi-hop question answering system, as well as the subsequent discussions and expectations.

关键词： intelligent computing multi-hop quiz text reasoning document retrieval text complex network

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Switching,explosion,and chaos of multi-wavelength soliton states in ultrafast fiber lasers

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 82-90页

作者： Zhi-Zeng Si Yue-Yue Wang Chao-qing dai College of Optical Mechanical and Electrical EngineeringZhejiang A&F UniversityLin’an 311300China

Because of the complexity and difficulty of realizing a multi-wavelength soliton state,reports on its internal dynamic characteristics are *** this study,the switching and periodic soliton explosion processes of the multi-wavelength soliton state in a negative dispersion passively mode-locked fiber laser are *** generation of the multi-wavelength soliton state undergoes the process of noise,oscillation,and stable mode-locking,and the splitting and annihilation of solitons with different group velocities directly impact the generation and disappearance of three *** and negative dispersion lead to different group velocities of *** presence and displacement of solitons with different group velocities cause soliton collisions,which lead to soliton explosions.A soliton experiences relative phase oscillation,chaos,and oscillation,as well as convergence and separation before and after an *** an increase in parameters related to pump power,single-soliton oscillation,multi-wavelength solitons,and chaos are found in experiments and simulations,proving the relevance and reliability between simulation and experimental *** work promotes the dynamical study of multi-soliton collisions in nonlinear science and the development of chaos theory in multi-comb lasers.

关键词： multi-wavelength fiber laser soliton explosion chaos state switching real-time dynamics

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Scraping therapy for knee osteoarthritis: a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第4期44卷 633-641页

作者： CHEN Dandan JIN Qianhong SHEN Yuanjuan WANG qing dai Zhengxiang School of Nursing Guangxi University of Chinese MedicineNanning 530200China School of Nursing Nanjing University of Chinese MedicineNanjing 210023China General Surgery Department Jiangsu Province Hospital of Chinese MedicineNanjing 210004China Hospital Infection Control Office Jiangsu Province Hospital of Chinese MedicineNanjing 210004China

OBJECTIVE:To systematically evaluate the efficacy of scraping therapy on knee osteoarthritis(KOA).METHODS:A computerized search was conducted in several databases,including PubMed,Web of Science,Cochrane Library,China National Knowledge Infrastructure Database,China Science and Technology Journal Database,Wanfang,and Chinese BioMedical Literature Database,from the establishment date of these databases to April 9,*** controlled trials(RCTs)on scraping therapy for KOA were collected in accordance with the“Participants-Intervention-Control-Outcome-Study design”*** methodological evaluation of the included studies was carried out using RoB 2.0,and Meta-analysis was conducted using *** Grades of Recommendations Assessment,Development and Evaluation(GRADE System)was applied to grade the quality of ***:A total of 12 RCTs with 997 subjects were included in the *** indicated that compared with the control group,the scraping therapy treatment group exhibited increased Lysholm scores[mean difference(MD)=4.96,95%confidence intervals(CI)(3.18,6.74),P<0.00001]and Hospital for Special Surgery scores[MD=8.35,95%CI(3.92,12.78),P=0.0002]and decreased visual analog scale scores[MD=-2.11,95%CI(-3.79,-0.44),P=0.01]and Western Ontario and McM aster University Osteoarthritis Index scores[MD=-6.77,95%CI(-8.99,-4.56),P<0.00001)].The quality of evidence obtained in this Meta-analysis was low according to the GRADE ***:The available evidence suggests that scraping therapy may have certain clinical efficacy in the treatment of ***,further high-quality RCTs are needed to confirm the findings.

关键词： osteoarthritis,knee scraping Meta-analysis systematicreview

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Insight of enriched basalts into the nature and evolution of mantle lithosphere beneath craton margins

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Science China Earth Sciences 2024年第10期67卷 3128-3142页

作者： Hong-Kun dai Jianping ZHENG qing XIONG Linlin HU Xiang ZHOU State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China

Refractory lithospheric deep roots are the cornerstone for the prolonged stability of cratons and mantle xenoliths are normally the key targets for study on the evolution of such deep roots. In regions with few mantle xenoliths, the basalts enriched in radiogenic isotopic compositions due to marked lithospheric mantle contribution are crucial to unmask the lithospheric mantle evolution based on a comprehensive study involving petrology, geochemistry and thermodynamic modelling. Here, the Early Cretaceous basalts from the northwest North China Craton with few mantle xenoliths are taken as an example to show the significance of enriched basalts on the study of lithospheric mantle. These basalts are characterized by high silica and alkali contents(SiO_(2)=45.8–59.8 wt.%, K_(2)O+Na_(2)O=4.81–9.88 wt.%), arc-type trace-element patterns and enriched radiogenic isotope compositions(e.g., ε_(Nd)=-2.64–-12.88,^(87)Sr/^(86)Sr=0.7063–0.7093). The TiO_(2) and FeO(total) contents are higher than those of natural and experimental melts from refractory mantle peridotite but comparable to those of partial melts of fertile mantle *** high contents of fluid-loving elements(e.g., Rb and Ba) suggest source metasomatism by aqueous fluids. Combined with thermodynamic modelling and regional tectonic history, these enriched basalts likely record simultaneous decompression melting of asthenosphere and low-extent melting of thin and fertile lithospheric mantle fluxed by aqueous fluids from the subducted Paleo-Asian oceanic slab. The newly unmasked lithospheric mantle under the western NCC contrasts with the coeval thick and refractory one supporting the eastern NCC, and highlights that the craton destruction, especially the loss of its ancient refractory mantle root, should take place in a diachronous manner related to the craton-girded subduction episodes. Our study illustrates the potential of enriched basalts to recover the nature and evolution of mantle lithosphere beneath craton m

关键词： Enriched basalts Lithospheric mantle Northwest North China Craton Tectonic histories Early Cretaceous

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Tubeufiales,***.,integrating sexual and asexual generic names

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Fungal Diversity 2014年第5期68卷 239-298页

作者： Saranyaphat Boonmee Amy Y.Rossman Jian-Kui Liu Wen-Jing Li don-qing dai Jayarama D.Bhat E.B.Gareth Jones Eric H.C.McKenzie Jian-Chu Xu Kevin D.Hyde Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of ScienceKunming 650201YunnanChina World Agro forestry Centre East and Central Asia Office 132 Lanhei RoadKunming 650201China Institute of Excellence in Fungal Research Mae Fah Luang UniversityMuangChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityMuangChiang Rai 57100Thailand Systematic Mycology and Microbiology Laboratory USDA-ARSBeltsvilleMD 20705USA Formerly at Department of Botany Goa UniversityGoa 403206India Department of Botany and Microbiology King Saudi UniversityRiyadhSaudi Arabia Landcare Research AucklandNew Zealand

Tubeufiaceae is based on the generic type Tubeufia,which is characterized by superficial,oval and bright ascomata,bitunicate asci,mostly long fusiform to filiform,transeptate ascospores and hyphomycetous asexual states with helicosporous *** species in this family are saprobic on terrestrial woody substrates and some are *** distinct morphology as well as combined LSU,SSU and TEF1 sequence analysis show that Tubeufiaceae should be accommodated in a new order Tubeufiales,which is introduced in this *** analyses of combined LSU and ITS sequences were used to resolve genera and species within the family *** this study,we examine and incorporate sexual and asexual states of genera in Tubeufiales to provide a modern treatment,based on single *** epitype for Tubeufia javanica,the type species of Tubeufia,is designated and represents Tubeufia sensu *** genera Acanthophiobolus,Acanthostigma,Boerlagiomyces,Chlamydotubeufia,Kamalomyces,Podonectria,Thaxteriella and Thaxteriellopsis are accepted,Acanthostigmina is reinstated,and the asexual genera Aquaphila,Helicoma,Helicomyces,Helicosporium and Tamhinispora are accepted in *** new genera Acanthohelicospora,Helicangiospora and Neoacanthostigma are *** genus Bifrontia is added to the family based on morphological *** incongruous morphological genera Acanthostigmella,Amphinectria,Chaetocrea,Chaetosphaerulina,Glaxoa,Malacaria,Melioliphila,Paranectriella,Puttemansia,Rebentischia and Uredinophila are excluded from Tubeufiaceae despite having characteristic ascomata with setae and multiseptate long spores.A key to genera accepted in Tubeufiaceae is provided.

关键词： Dothideomycetes Helicospores New genus Phylogeny Taxonomy Tubeufiaceae

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Study on the Performance of the GRANDProto300 Particle Detector Array by Simulation

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Research in Astronomy and Astrophysics 2024年第1期24卷 173-177页

作者： Fu-Lin dai Quan-Bu Gou Xiaoyuan Huang Yi-qing Guo Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

The Giant Radio Array for Neutrino Detection(GRAND)is a proposed large-scale observatory designed to detect cosmic rays,gamma-rays,and neutrinos with energies exceeding 100 Pe *** GRANDProto300 experiment is proposed as the early stage of the GRAND project,consisting of a hybrid array of radio antennas and scintillator *** latter,as a mature and traditional detector,is used to cross-check the nature of the candidate events selected from radio *** this study,we developed a simulation software called G4GRANDProto300,based on the Geant4 software package,to optimize the spacing of the scintillator detector array and to investigate its effective *** analysis was conducted at various zenith angles under different detector spacings,including 300,500,600,700,and 900 *** results indicate that,for large zenith angles used to search for cosmic-ray in the GRAND project,the optimized effective area is with a detector spacing of 500 *** G4GRANDProto300 software that we developed could be used to further optimize the layout of the particle detector array in future work.

关键词： astroparticle physics instrumentation:detectors (ISM:)cosmic rays

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Used car price prediction based on XGBoost and retention rate

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The Journal of China Universities of Posts and Telecommunications 2024年第3期31卷 72-79页

作者： Shen Yutian Chen Jian dai Min Zhang Sirui Xu Jing Wang qing College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China College of Economics and Management Southeast University Chengxian CollegeNanjing 210088China Shandong Shuncheng Automobile Trade Co. LtdJinan 250000China

In order to improve the accuracy of used car price prediction,a machine learning prediction model based on the retention rate is proposed in this ***,a random forest algorithm is used to filter the variables in the *** main characteristic variables that affect used car prices,such as new car price,service time,mileage and so on,are filtered ***,the linear regression classification method is introduced to classify the test data into high and low retention rate *** that,the extreme gradient boosting(XGBoost)regression model is built for the two datasets *** prediction results show that the comprehensive evaluation index of the proposed model is 0.548,which is significantly improved compared to 0.488 of the original XGBoost ***,compared with other representative machine learning algorithms,this model shows certain advantages in terms of mean absolute percentage error(MAPE),5%accuracy rate and comprehensive evaluation *** a result,the retention rate-based machine learning model established in this paper has significant advantages in terms of the accuracy of used car price prediction.

关键词： random forest data dimensionality reduction extreme gradient boosting(XGBoost) retention rate price prediction

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The effects of various factors on spontaneous imbibition in tight oil reservoirs

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Petroleum Science 2024年第1期21卷 315-326页

作者： Cheng Liu Tian-Ru Wang qing You Yue-Chun Du Guang Zhao Cai-Li dai School of Energy Resources China University of GeosciencesBeijing100083PR China School of Petroleum Engineering China University of PetroleumQingdao266580ShandongPR China

Slickwater fracturing fluids have gained widespread application in the development of tight oil reservoirs. After the fracturing process, the active components present in slickwater can directly induce spontaneous imbibition within the reservoir. Several variables influence the eventual recovery rate within this procedure, including slickwater composition, formation temperature, degree of reservoir fracture development, and the reservoir characteristics. Nonetheless, the underlying mechanisms governing these influences remain relatively understudied. In this investigation, using the Chang-7 block of the Changqing Oilfield as the study site, we employ EM-30 slickwater fracturing fluid to explore the effects of the drag-reducing agent concentration, imbibition temperature, core permeability, and core fracture development on spontaneous imbibition. An elevated drag-reducing agent concentration is observed to diminish the degree of medium and small pore utilization. Furthermore, higher temperatures and an augmented permeability enhance the fluid flow properties, thereby contributing to an increased utilization rate across all pore sizes. Reduced fracture development results in a lower fluid utilization across diverse pore types. This study deepens our understanding of the pivotal factors affecting spontaneous imbibition in tight reservoirs following fracturing. The findings act as theoretical, technical, and scientific foundations for optimizing fracturing strategies in tight oil reservoir transformations.

关键词： Tight oil reservoir Spontaneous imbibition Nuclear magnetic resonance Slickwater fracturing fluid Fluid utilization degree

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Microstructure design of advanced magnesium-air battery anodes

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Journal of Magnesium and Alloys 2024年第2期12卷 443-464页

作者： Xu Huang qingwei dai qing Xiang Na Yang Gaopeng Zhang Ao Shen Wanming Li School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang 550025China School of Material and Metallurgy University of Science and Technology LiaoningAnshan 114051China

Metal-air battery is an environmental friendly energy storage system with unique open ***(Mg)and its alloys have been extensively attempted as anodes for air batteries due to high theoretical energy density,low cost,and ***,the study on Mg-air battery(MAB)is still at the laboratory level currently,mainly owing to the low anodic efficiency caused by the poor corrosion *** order to reduce corrosion losses and achieve optimal utilization efficiency of Mg anode,the design strategies are reviewed from microstructure ***,the corrosion behaviors have been discussed,especially the negative difference effect derived by hydrogen *** attention is given to the effect of anode micro-structures on the MAB,which includes grain size,grain orientation,second phases,crystal structure,twins,and *** further improvement,the discharge performance,long period stacking ordered phase and its enhancing effect are ***,given the current debates over Mg dendrites,the potential risk,the impact on discharge,and the elimination strategies are *** control and single crystal would be promising ways for MAB anode.

关键词： Magnesium Air battery Anode Microstructure Anodic efficiency

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Interfacial reaction between AZ91D magnesium alloy melt and mild steel under high temperature

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China Foundry 2024年第2期21卷 159-167页

作者： Jia-hong dai Jian-yue Zhang Bin Jiang Xiang-jun Xu Zhong-tao Jiang Hong-mei Xie qing-shan Yang Guo-qing Zhang College of Materials Science and Engineering Yangtze Normal UniversityChongqing 408100China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Chongqing Jiulongyuan High-tech Industry Group Co. Ltd.Chongqing 400080China Loncin Industry Co. Ltd.Chongqing 400080China Department of Materials Science and Engineering The Ohio State UniversityColumbusOH 43210USA Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing University of Arts and SciencesChongqing 402160China School of Metallurgy and Material Engineering Chongqing University of Science and TechnologyChongqing 401331China

The metallurgical quality control of magnesium(Mg)and Mg alloys in melting process is required to ensure a satisfied mechanical and corrosion performance,while the typical used steel crucible introduces impurities and interfacial interaction during melting ***,a systematic study about impurities diffusion and interfacial interaction between molten Mg and steel is *** the present study,the interfacial reaction between molten AZ91D Mg alloy and mild steel during melting process was investigated with the melting temperatures of 700℃,750℃ and 800℃.The results show that Al(Fe,Mn)intermetallic layer is the intermetallic primarily formed at the interfaces of AZ91D melt and mild ***,Al_(8)(Mn,Fe)5is indexed between Al(Fe,Mn)and ***_(3)C appears between the mild steel and Al(Fe,Mn)at 700℃ and 750℃,but absent at 800℃ due to the increased solubility of carbon in Mg *** is found that the growth of the intermetallic layer is controlled by diffusion mechanism,and Al and Mn are the dominant diffusing species in the whole interfacial reaction *** measuring the thickness of different layers,the growth constant was *** increases from 1.89(±0.03)×10^(-12)m^(2)·s^(-1)at 700℃ to 3.05(±0.05)×10^(-12)m^(2)·s^(-1)at 750℃,and 5.18(±0.05)×10^(-12)m^(2)·s^(-1)at 800℃.Meanwhile,the content of Fe is linearly increased in AZ91D with the increase of holding time at 700℃ and 750℃,while it shows a significantly increment after holding for 8 h at 800℃,indicating holding temperature is more crucial to determine the Fe content of AZ91D than holding time.

关键词： AZ91D mild steel interface reaction intermetallic growth kinetics

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