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Resilient performance of self-centering hybrid rocking walls with curved interface under pseudo-static loading

Earthquake Engineering and Engineering Vibration 2024年第1期23卷 65-85页

作者： Su Xing Yan Shi Sun Xianglei Wang Tao School of Civil Engineering Shenyang Jianzhu UniversityShenyang 110168China PetroChina East China Design Institute co. Ltd.Qingdao 266000China Qingdao co.ntry Garden Bolin Real Estate co. Ltd.Qingdao 266100China

Frame and rocking wall(FRW)structures have excellent resilient performance during ***,the co.crete at interfacial co.ners of rocking walls(RWs)is easily crushed due to local extreme co.pression during the rocking *** innovative RW with a curved interface is proposed to prevent interfacial co.ners from producing local damage,enhancing its earthquake resilient performance(ERP).The precast wall panel with a curved interface is assembled into an integral self-centering hybrid rocking wall(SCRW)by two post-tensioned unbonded prestressed ***,two ordinary energy dissipation steel rebars and two shear reinforcements are arranged to increase the energy dissipation capacity and lateral *** SCRW specimens and one monolithic reinforced co.crete(RC)shear wall(SW)were tested under pseudo-static loading to co.pare the ERPs of the proposed SCRW and the SW,focusing on studying the effect of the curved interface on the *** key resilient performance of rocking effects,failure modes,and hysteretic properties of the SCRW were *** results show that nonlinear deformations of the SCRW are co.centrated along the interface between the SCRW and the foundation,avoiding damage within the *** restoring force provided by the prestressed tendons can effectively realize self-centering capacity with small residual deformation,and the resilient performance of the SCRW is better than that of monolithic *** addition,the curved interface of the SCRW makes the rocking center change and move inward,partially relieving the stress co.centration and crush of *** rocking range of the rocking center is about 41.4%of the width of the SCRW.

关键词： self-centering hybrid rocking wall(SCRW) monolithic shear wall(SW) earthquake resilient performance(ERP) curved interface rocking center

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Design method of extractant for liquid-liquid extraction based on elements and chemical bonds

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Chinese Journal of Chemical Engineering 2024年第4期68卷 193-202页

作者： Yuwen Wei Chunling Zhang Yue Zhang Lili Wang Li Xia Xiaoyan Sun Shuguang Xiang Institute of Process System Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Yantai Guobang Chemical Machinery technology co. Ltd.Yantai 264002China

In the petrochemical industry process, the relative volatility between the co.ponents to be separated is close to one or the azeotrope that systems are difficult to separate. Liquid-liquid extraction is a co.mon and effective separation method, and selecting an extraction agent is the key to extraction technology research. In this paper, a design method of extractants based on elements and chemical bonds was proposed. A knowledge-based molecular design method was adopted to pre-select elements and chemical bond groups. The molecules were automatically synthesized acco.ding to specific co.bination rules to avoid the problem of “co.bination explosion” of molecules. The target properties of the extractant were set, and the extractant meeting the requirements was selected by predicting the co.relation physical properties of the generated molecules. Based on the separation performance of the extractant in liquid-liquid extraction and the relative importance of each index, the fuzzy co.prehensive evaluation membership function was established, the analytic hierarchy process determined the mass ratio of each index, and the co.sistency test results were passed. The results of case study based on quantum chemical analysis demonstrated that effective determination of extractants for the analysis of benzene-cyclohexane systems. The results unanimously prove that the method has important theoretical significance and application value.

关键词： Molecular design Element and chemical bonds Molecular simulation Thermodynamics Solvent extraction

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Effect of cerium on microstructure,texture and properties of ultrahigh-purity co.per

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Journal of Rare Earths 2024年第1期42卷 220-227,I0008页

作者： Yunxiao Hua Haitao Liu Kexing Song Jiangwei Wang Yin'gang Guo Jing Tian Huiwen Guo Provincial and Ministerial co.co.struction of co.laborative Innovation center for Non-ferrous Metal New Materials and Advanced Processing technology School of Materials Science and EngineeringHenan University of Science and TechnologyLuoyang471023China Henan Academy of Sciences Zhengzhou450000China center of Electron Microsco.y and State Key Laboratory of Silico. Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Henan Zhongyuan Gold Smelter co. Ltd.Sanmenxia472100China Chinalco.Luoyang co.per Processing co. Ltd.Luoyang471039China

The effects of Ce addition(310 ppm and 1500 ppm)on the microstructure,texture and properties of ultrahigh-purity co.per(99.99999%)were systematically studied using scanning electron microsco.y(SEM),transmission electron microsco.y(TEM)and electron backscattered diffraction(EBSD)analyses,co.bined with the microhardness and co.ductivity *** the microstructure of the as-cast and as-extruded samples,the addition of Ce refines the grain size of the ultrahigh-purity co.per and the refinement effect of 310Ce alloy is greater than that of 1500Ce *** is due to the stronger co.pone nt superco.ling and the accele rated recrystallization caused by lower Ce co.*** addition,Ce can react with Cu to form the Cu-Ce eutectic phases,which are deformable during the hot ***,the added Ce can weaken the texture,showing a variation of brass recrystallization(BR),rotated cube,co.per and S texture co.ponents,which depends on the recrystallization,the particle stimulated nucleation(PSN)as well as the stacking fault energy(SFE).Most remarkably,the introduction of Ce enhances the hardness of the ultrahigh-purity co.per without obviously reducing its *** major{111}orientations and the stress distributions are responsible for such a superior co.ductivity of the Ce-co.taining alloys.

关键词： Ce addition Grain refinement Texture co.ductivity Ultrahigh-purity co.per Rare earths

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Performance of elastic ball screen-cleaning device based on DEM-MBD co.pling simulation

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Particuology 2024年第10期93卷 247-263页

作者： Yubin Bi Qingbin Song Jingyu Zhu Jintao Feng Jianxin Dong Pengfei Zhao Yuxiang Huang Zuoli Fu Jixing Zhou co.lege of Mechanical and Electric Engineering Northwest A&F UniversityYangling712100China Shaanxi Engineering Research center for Agricultural Equipment Yangling712100China Zhengzhou Dufeng technology co. Ltd.Zhengzhou450000China

In seed breeding, the vibrating screen used for pre-sowing grading parental seeds often has the problem of poor self-purification rate. Using elastic balls to clean the plugging seeds and ensure the self-purification of the screen is a viable technical solution. To clarify and improve the operating performance of the elastic ball particles, a DEM-MBD co.pling simulation model of the elastic ball screen-cleaning device was established in this study, and a numerical simulation analysis of the co.plex motion process was carried out. The mechanism of action of the elastic ball was explained more co.pletely from the aspects of excitation force and energy transfer. Through the Plackett-Burman test, it was determined that the vibration frequency has the most significant effect on the excitation force. Multiple linear regression analysis was performed on each factor and the mathematical relationship equation. It was found that when the maximum excitation force was greater than 7 N and the average excitation force was greater than 2 N, the self-purification rate was greater than 95%. The self-purification rate was then increased to 99.81% by variable frequency tests. The variable frequency achieved better self-purification effect.

关键词： Seed breeding Grading Vibrating screen Self-purification co.pling simulation Variable frequency

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Application of Isogeometric Analysis Method in Three-Dimensional Gear co.tact Analysis

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co.puter Modeling in Engineering & Sciences 2024年第4期139卷 817-846页

作者： Long Chen Yan Yu Yanpeng Shang Zhonghou Wang Jing Zhang School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai200093China Zhejiang Fine-Motion Robot Joint technology co. Ltd.Taizhou317600China

Gears are pivotal in mechanical drives,and gear co.tact analysis is a typically difficult problem to *** isogeometric analysis(IGA)methods have developed new ideas to solve this *** this paper,a threedimensional body parametric gear model of IGA is established,and a theoretical formula is derived to realize single-tooth co.tact *** were benchmarked against those obtained from co.mercial software utilizing the finite element analysis(FEA)method to validate the accuracy of our *** findings indicate that the IGA-based co.tact algorithmsuccessfullymet theHertz co.tact *** juxtaposed with the FEA approach,the IGAmethod demonstrated fewer node degrees of freedomand reduced co.putational units,all whilemaintaining co.parable ***,the IGA method appeared to exhibit co.sistency in analysis accuracy irrespective of co.putational unit density,and also significantlymitigated non-physical oscillations in co.tact stress across the tooth *** undersco.es the prowess of IGA in co.tact *** co.clusion,IGA emerges as a potent tool for addressing co.tact analysis challenges and holds significant promise for 3D gear modeling,simulation,and optimization of various mechanical co.ponents.

关键词： co.tact analysis involute gear isogeometric analysis finite element analysis

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Investigation of FRP and SFRC Technologies for Efficient Tunnel Reinforcement Using the co.esive Zone Model

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Structural Durability & Health Monitoring 2024年第2期18卷 161-179页

作者： Gang Niu Zhaoyang Jin Wei Zhang Yiqun Huang China co.munications co.struction Investment Development co. Ltd.Fuzhou350000China Rail Transit Branch of China co.munications co.struction co. Ltd.Beijing101317China School of Civil Engineering Fujian University of TechnologyFuzhou350118China

Amid urbanization and the co.tinuous expansion of transportation networks,the necessity for tunnel co.struction and maintenance has beco.e *** this need requires the investigation of efficient,eco.omical,and robust tunnel reinforcement *** paper explores fiber reinforced polymer(FRP)and steel fiber reinforced co.crete(SFRC)technologies,which have emerged as viable solutions for enhancing tunnel *** is celebrated for its lightweight and high-strength attributes,effectively augmenting load-bearing capacity and seismic resistance,while SFRC’s notable crack resistance and longevity potentially enhance the performance of tunnel ***,current research predominantly focuses on experimental analysis,lacking co.prehensive theoretical *** bridge this gap,the co.esive zone model(CZM),which utilizes co.esive elements to characterize the potential fracture surfaces of co.crete/SFRC,the rebar-co.crete interface,and the FRP-co.crete interface,was employed.A modeling approach was subsequently proposed to co.struct a tunnel segment model reinforced with either SFRC or ***,the co.responding mixed-mode co.stitutive models,co.sidering interfacial friction,were integrated into the proposed *** validation and numerical simulations co.roborated the accuracy of the proposed ***,this study examined the reinforcement design of tunnel *** a numerical evaluation,the effectiveness of innovative reinforcement schemes,such as substituting co.crete with SFRC and externally bonding FRP sheets,was assessed utilizing a case study from the Fuzhou Metro Shield Tunnel co.struction Project.

关键词： Tunnel segment FRP SFRC co.esive zone model co.stitutive model fracture process

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A Blockchain-Based Proxy Re-Encryption Scheme with co.ditional Privacy Protection and Auditability

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China co.munications 2024年第7期21卷 267-277页

作者： Chen Guo PengWeijun Wu Jing Fang Youxuan Ye Keke Xin Yanshuang China Mobile Information technology co. LtdBeijing 100037China China Mobile Information technology co. LtdShenzhen 518048China

With the development of Internet of Things technology,intelligent door lock devices are widely used in the field of house *** the traditional housing leasing scenario,problems of door lock information disclosure,tenant privacy disclosure and rental co.tract disputes frequently occur,and the security,fairness and auditability of the housing leasing transaction cannot be *** solve the above problems,a blockchain-based proxy re-encryption scheme with co.ditional privacy protection and auditability is *** scheme implements fine-grained access co.trol of door lock data based on attribute encryption technology with policy hiding,and uses proxy re-encryption technology to achieve auditable supervision of door lock information *** encryption technology and zero-knowledge proof technology are introduced to ensure the co.fidentiality of housing rent information and the fairness of rent *** co.struct a decentralized housing lease transaction architecture,the scheme realizes the efficient co.laboration between the door lock data ciphertext stored under the chain and the key information ciphertext on the chain based on the blockchain and InterPlanetary File ***,the security proof and co.puting performance analysis of the proposed scheme are carried *** results show that the scheme can resist the chosen plaintext attack and has low co.putational co.t.

关键词： attribute encryption blockchain homomorphic encryption house leasing proxy re-encryption zero-knowledge proof

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Influence of calendering process on the structural mechanics and heat transfer characteristics of lithium-ion battery electrodes via DEM simulations

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Particuology 2024年第2期85卷 252-267页

作者： Junpeng Zhang Jingna Sun Huagui Huang Zhenge Yuan National Engineering Research center for Equipment and technology of co.d Strip Rolling Yanshan UniversityQinhuangdao066004China Xingtai Naknor technology co. LtdXingtai054000China

Elucidating the intricate co.relation between calendering,structure,and performance is crucial to co.prehending the relationship between performance parameters and process steps of lithium-ion batteries(LIBs).Discrete element method(DEM)simulations were adopted in this work to calculate the interparticle force and stress tensor under incremental calendering process co.ditions,which revealed the effect of the anisotropy of co.plex co.tact force network on the anisotropy of heat transfer within porous *** thermal co.ductivity of electrode was predicted using porosity to characterize the process-structure-performance *** co.prehensive influence of co.tact number and co.-tact area between particles and current co.lector determines the magnitude of interfacial thermal resistance and interfacial heat transfer *** the first time,this work quantitatively analyzed the structural mechanics and heat transfer mechanism during calendering process of porous electrodes,and the results indicate a promising way to optimize and design battery electrode structures.

关键词： Li-ion battery electrode Structural mechanicsAnisotropy Thermal co.ductivity Discrete element method

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Effect of Low pH on Forming Process of Desulfurization Gypsum co.posite Boards Strengthened by Melamine-formaldehyde Resin

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Journal of Wuhan University of technology(Materials Science) 2024年第5期39卷 1223-1228页

作者： CAO Lijiu ZHANG Jiyao WANG Xinqi ZHANG Xinhe HUANG Jian CHEN Yufang JIN Tao CAS Testing Technical Service(Guangzhou)co. Ltd.Guangzhou 510650China Xuefeng Innovation(Beijing)technology co. Ltd.Beijing 102200China Guangzhou Institute of Chemistry Chinese Academy of SciencesGuangzhou 510650China University of Chinese Academy of Sciences Beijing 100049China

Through exploring the effects of low pH on the co.posite system of desulfurization gypsum(DG)enhanced by melamine-formaldehyde resin(MF),it is found that the inducing of sulfate-ion,in co.trast to chloride and oxalate ions,favors the longitudinal growth of the crystalline form of the hydration product,which was relatively simple and had the highest length to width(L/D)*** the same time,MF can also improve L/D ratio of gypsum hydration products,which favors the formation of hydrated ***,in a co.posite system co.posed of hemihydrate gypsum,MF,and glass fibers,when dilute sulfuric acid was used to regulate pH=3-4,the tight binding formed among the co.ponents of the co.posite system co.pared to pH=*** hydration product of gypsum adheres tightly to glass fiber surface and produces a good cross-linking and binding effect with *** flexural strength,co.pressive strength,elastic modulus,and water absorption of the desulphurized gypsum co.posite board is 22.7 MPa,39.8 MPa,5608 MPa,and 1.8%,respectively.

关键词： MF-reinforced desulphurized gypsum board co.posite forming system low pH co.dition hydration process aspect ratio synergistic effect

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Screening antimicrobial peptides and probiotics using multiple deep learning and directed evolution strategies

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3476-3492页

作者： Yu Zhang Li-Hua Liu Bo Xu Zhiqian Zhang Min Yang Yiyang He Jingjing Chen Yang Zhang Yucheng Hu Xipeng Chen Zitong Sun Qijun Ge Song Wu Wei Lei Kaizheng Li Hua Cui Gangzhu Yang Xuemei Zhao Man Wang Jiaqi Xia Zhen Cao Ao Jiang Yi-Rui Wu Tidetron Bioworks technology(Guangzhou)co. Ltd.Guangzhou Qianxiang Bioworks Co.Ltd.Guangzhou 510000China Biology Department and Institute of Marine Sciences College of ScienceShantou UniversityShantou 515063China School of Basic Medical Sciences Hubei University of Science and TechnologyXianning 437100China School of Education Jianghan UniversityWuhan 430056China Yeasen Biotechnology(Shanghai)co. Ltd.Shanghai 200000China School of Basic Medicine Jiamusi UniversityJiamusi 154000China

Owing to their limited accuracy and narrow applicability,current antimicrobial peptide(AMP)prediction models face obstacles in industrial *** address these limitations,we developed and improved an AMP prediction model using co.paring and Optimizing Multiple DEep Learning(co.DEL)algorithms,co.pled with high-throughput AMP screening method,finally reaching an accuracy of 94.8%in test and 88%in experiment verification,surpassing other state-of-the-art *** co.junction with co.DEL,we employed the phage-assisted evolution method to screen Sortase in vivo and developed a cell-free AMP synthesis system in vitro,ultimately increasing AMPs yields to a range of 0.5-2.1 g/L within ***,by multi-omics analysis using co.DEL,we identified Lactobacillus plantarum as the most promising candidate for AMP generation among 35 edible *** this,we developed a microdroplet sorting approach and successfully screened three *** mutants,each showing a twofold increase in antimicrobial ability,undersco.ing their substantial industrial application values.

关键词： Antimicrobial peptide Deep learning Cell-free synthesis Probiotics L.plantarum

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