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Construction of conjugated scaffolds driven by mechanochemistry towards energy storage applications

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Green Chemical Engineering 2024年第2期5卷 155-172页

作者： Juntian Fan Zhenzhen Yang sheng dai Department of Chemistry Institute for Advanced Materials and ManufacturingUniversity of TennesseeKnoxvilleTN37996USA Chemical sciences Division Oak Ridge National LaboratoryOak RidgeTN37831USA

Mechanochemistry has been recognized as an efficient and sustainable methodology to provide a unique driven force and reaction environments under ambient and neat conditions for the construction of functionalized materials possessing promising *** them,highly porous conjugated scaffolds with attractive electronic conductivities and high surface areas are one of the representative categories exhibiting diverse taskspecific applications,especially in electrochemical energy *** recent years.the mechanochemistry-driven procedures have been deployed to construct conjugated scaffolds with engineered structures and properties leveraging the tunability in chemical structures of building blocks and polymerization capability of diverse ***,a thorough review of related works is required to gain an in-depth understanding of the mechanochemical synthesis procedure and property-performance relationship of the as-produced conjugated ***,the mechanochemistry-driven construction of conjugated porous networks(CPNs),the carbon-based materials(e.g.,graphite and graphyne),and carbon supported single atom catalysts(Cs-sACs)are discussed and *** electrochemical performance of the afforded conductive scaffolds as electrode materials in supercapacitors and alkali-ion batteries is ***,the challenges and potential opportunities related to the construction of conjugated scaffolds driven by mechanochemistry are also discussed and concluded.

关键词： Mechanochemistry Conjugated scaffolds Porous organic networks Alkali-ion battery supercapacitor

GCAGA: A Gini Coefficient-Based Optimization strategy for Computation Offloading in Multi-User-Multi-Edge MEC system

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Computers, Materials & Continua 2024年第6期79卷 5083-5103页

作者： Junqing Bai Qiuchao dai Yingying Li school of Computing Xi’an Shiyou UniversityXi’an710065China Product Center Wingtech Technology(Wuxi)Co.Wuxi214028China

to support the explosive growth of Information and Communications.technology(ICt),Mobile Edge Comput-ing(MEC)provides users with low latency and high bandwidth service by offloading computational tasks.to the network’s ***,resource-constrained mobile devices still suffer from a capacity mismatch when faced with latency-sens.tive and compute-intensive emerging *** address.the difficulty of running computationally intensive applications on resource-constrained clients,a model of the computation offloading problem in a network consisting of multiple mobile users and edge cloud servers is studied in this *** a user benefit function EoU(Experience of Users)is proposed jointly considering energy consumption and time *** EoU maximization problem is decomposed into two steps,i.e.,resource allocation and offloading *** offloading decision is usually given by heuristic algorithms which are often faced with the challenge of slow convergence and poor ***,a combined offloading algorithm,i.e.,a Gini coefficient-based adaptive genetic algorithm(GCAGA),is proposed to alleviate the *** proposed algorithm optimizes.the offloading decision by maximizing EoU and accelerates.the convergence with the Gini *** simulation compares.the proposed algorithm with the genetic algorithm(GA)and adaptive genetic algorithm(AGA).Experiment results show that the Gini coefficient and the adaptive heuristic operators can accelerate the convergence speed,and the proposed algorithm performs better in terms of convergence while obtaining higher *** simulation code of the proposed algorithm is available:https://***/Grox888/Mobile_Edge_Computing/tree/GCAGA.

关键词： Mobile edge computing multi-user-multi-edge joint optimization Gini coefficient adaptive genetic algorithm

strong evidence for latitudinal divers.ty gradient in mosses across.the world

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Plant Divers.ty 2024年第4期46卷 537-541页

作者： Hong Qian Zun dai Jian Wang Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA Bryology Laboratory School of Life SciencesEast China Normal UniversityShanghai 200241China shanghai Institute of Eco-Chongming(sIEC) 3663 Northern Zhongshan RoadShanghai 200062China

species richness generally decreases with increasing latitude,a biodivers.ty gradient that has long been considered as one of the few laws in *** latitudinal divers.ty gradient has been observed in many major groups of *** plants.the latitudinal divers.ty gradient has been observed in vascular plants,angiosperms,ferns,and ***,a conspicuous latitudinal divers.ty gradient in mosses at a global or continental scale has not been observed until ***,we analyze a comprehensive data s.t including moss species in each band of 20° in latitude *** results show that moss species richness decreases strongly with increasing latitude,regardless of whether the globe is considered as a whole or different longitudinal segments(e.g.,Old World versus New World) are considered *** result holds when variation in area size among latitudinal bands is.taken into ***'s correlation coefficient between latitude and species richness is-0.99 for both the Northern and southern *** bryophytes are an extant lineage of early land plants and because mosses not only include most of extant species of bryophytes but also are important constituents of most terrestrial ecosystems,understanding geographic patterns of mosses is particularly important the finding of our study fills a critical knowledge gap.

关键词： Bryophyte Latitudinal divers.ty gradient Moss species dens.ty species divers.ty

Mitigating methane emissions:Domestic and joint efforts by the United states and China

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Environmental science and Ecotechnology 2024年第4期20卷 2-5页

作者： Fan dai Yi Wang California-China Climate Institute The University of CaliforniaBerkeleyUSA Institutes of science and Development Chinese Academy of SciencesBeijingChina Univers.ty of Chinese Academy of sciences BeijingChina

During the Glasgow climate conference,the United states(U.s.)and China jointly committed to reduce methane emissions as a prioritized area of their bilateral cooperation in addressing climate change in the *** methane's strongwarming effect,which is over 80 times more potent than carbon dioxide in the first 20 years after release,reducing methane emissions is crucial to slowing down climate change in the near future[1].1 the significance of this joint commitment was reiterated in the recent U.s.-China sunnylands statement on Climate Cooperation,emphasizing the urgency and importance of reducing methane emissions both within each country's borders and through collaborative efforts.

关键词： methane dioxide iterated

the tail risk safe haven property of China's energy futures against Us market implied volatility

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Journal of Management science and Engineering 2024年第2期9卷 271-291页

作者： Xingyu dai Peng-Fei dai Qunwei Wang Zhi-Yi Ouyang College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing211106China Research Center for soft Energy science Nanjing University of Aeronautics and AstronauticsNanjing211106China school of Management Wuhan University of TechnologyWuhan430070China Research Institute of Digital Governance and Management Decision Innovation Wuhan University of TechnologyWuhan430070China Huafu Fund Management Co. Ltd.ShanghaiChina

this paper analyses.the tail risk contagion of Us market implied volatility(UsIV)on China's energy futures(CEF)markets,exploring how to utilize operations in the CEF to achieve a safe *** CEF characteristics.to simultaneously take both long-/short-pos.tions and engage in long-/short-run investment horizons.this paper defines eight different CEF safe haven attributes.to counteract the tail risk of extreme increases in *** trading data from March 27,2018,to October 30,2023,the empirical results show that,first,in the analysis of the entire sample period,China's coking coal futures can serve as a weak safe haven,aiding long-pos.tion investors in mitigating the tail risks associated with Us gold and stock market implied *** coal futures also assist short-pos.tion investors in countering Us stock market implied volatility tail ***,in the sub-period analysis.the safe haven attributes of CEF exhibit strong heterogeneity and asymmetry across different ***,the time span during which CEF exhibits a particular safe haven attribute does not persist for an extended period.

关键词： China's energy futures safe havenImplied volatility Multi-timescale analysis Cross-quantilogram model

Evidence of guide field magnetic reconnection in flapping current sheets

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Earth and Planetary Physics 2024年第4期8卷 650-658页

作者： Yuntian Hou suPing Duan Lei dai Chi Wang state Key Laboratory of space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Key Laboratory of solar Activity and space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China College of Earth and Planetary sciences University of Chinese Academy of SciencesBeijing 100049China

Based on current sheet flapping motion on 27 August 2018 in the dusk flank magnetotail,as recorded by instruments aboard Magnetospheric Multiscale(MMs)spacecraft,we present the first study of guide field reconnection observed in the flux rope embedded in kink-like flapping current sheets near the dusk-side flank of the *** more common magnetotail reconnections,which are symmetric,these asymmetric small-scale(λ_(i)~650 km)reconnections were found in the highly twisted current sheet when the direction normal to the sheet changes from the Z direction into the Y *** unique feature of this unusual reconnection is.that the reconnection jets are along the Z direction-different from outflow in the X direction,which is.the more usual *** vertical reconnection jet is parallel or antiparallel to the up-and-down motion of the tail’s current *** normalized reconnection rate R is estimated to be~*** results indicate that such asymmetric reconnections can significantly enlarge current sheet flapping,with large oscillation *** letter presents direct evidence of guide field reconnection in a highly twisted current sheet,characterized by enlarged current sheet flapping as a consequence of the reconnection outflow.

关键词： magnetic reconnection magnetotail current sheet

Nonlinear dynamics of a circular curved cantilevered pipe conveying puls.ting fluid based on the geometrically exact model

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Applied Mathematics and Mechanics(English Edition) 2024年第2期45卷 261-276页

作者： Runqing CAO Zilong GUO Wei CHEN Huliang dai Lin WANG Department of Engineering Mechanics School of Aerospace EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory for Engineering structural Analysis and safety Assessment Wuhan 430074China state Key Laboratory of Intelligent Manufacturing Equipment and technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Due to the novel applications of flexible pipes conveying fluid in the field of soft robotics and biomedicine,the investigations on the mechanical responses of the pipes have attracted considerable *** fluid-structure interaction(FsI)between the pipe with a curved shape and the time-varying internal fluid flow brings a great challenge to the revelation of the dynamical behaviors of flexible pipes,especially when the pipe is highly flexible and usually undergoes large *** this work,the geometrically exact model(GEM)for a curved cantilevered pipe conveying puls.ting fluid is developed based on the extended Hamilton's *** stability of the curved pipe with three different subtended angles is examined with the consideration of steady fluid *** attention is concentrated on the large-deformation resonance of circular pipes conveying puls.ting fluid,which is often encountered in practical *** constructing bifurcation diagrams,oscillating shapes,phase portraits.time traces,and Poincarémaps.the dynamic responses of the curved pipe under various system parameters are *** mean flow velocity of the puls.ting fluid is chosen to be either subcritical or *** numerical results show that the curved pipe conveying puls.ting fluid can exhibit rich dynamical behaviors,including periodic and quasi-periodic *** is also found that the preferred instability type of a cantilevered curved pipe conveying steady fluid is mainly in the flutter of the second *** a moderate value of the mass ratio,however,a third-mode flutter may occur,which is quite different from that of a straight pipe system.

关键词： curved pipe conveying fluid puls.ting fluid geometrically exact model(GEM) nonlinear dynamics parametric vibration flutter

Bald Eagle search Optimization Algorithm Combined with spherical Random shrinkage Mechanism and Its Application

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Journal of Bionic Engineering 2024年第1期21卷 572-605页

作者： Wenyan Guo Zhuolin Hou Fang dai Xiaoxia Wang Yufan Qiang Department of Applied Mathematics School of ScienceXi'an University of TechnologyXian 710054ShaanxiChina

Over the last two decades,stochastic optimization algorithms have proved to be a very promising approach to solving a variety of complex optimization *** eagle search optimization(BEs)as a new stochastic optimization algorithm with fast convergence speed has.the ability of prominent optimization and the defect of collapsing in the local *** avoid BEs collapse at local optima,inspired by the fact that the volume of the sphere is.the largest when the surface area is certain,an improved bald eagle search optimization algorithm(INMBEs)integrating the random shrinkage mechanism of the sphere is ***,the INMBEs embeds spherical coordinates.to design a more accurate parameter update method to modify the coverage and dispersion of the ***,the population splits into elite and non-elite groups and the Bernoulli chaos is applied to elite group to tap around potential solutions of the *** non-elite group is redistributed again and the Nelder-Mead simplex strategy is applied to each group to accelerate the evolution of the worst individual and the convergence process of the *** results of Friedman and Wilcoxon rank sum tests of CEC2017 in 10,30,50,and 100 dimensions numerical optimization confirm that the INMBEs has superior performance in convergence accuracy and avoiding falling into local optimization compared with other potential improved algorithms but inferior to the champion algorithm and ranking *** three engineering constraint optimization problems and 26 real world problems and the problem of extracting the best feature subs.t by encapsulated feature selection method verify that the INMBEs’s performance ranks first and has achieved s.tisfactory accuracy in solving practical problems.

关键词： Bald eagle search optimization algorithm spherical coordinates Chaotic variation simplex method Encapsulated feature selection

Multi-class classification of pathological myopia based on fundus photography

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Journal of Innovative Optical Health sciences 2024年第6期17卷 125-136页

作者： Jiaqing Zhao Guogang Cao Jiangnan He Cuixia dai shanghai Institute of technology No.100 Haiquan RoadFengxian DistrictShanghaiP.R.China shanghai Eye Diseases Prevention&treatment Center Shanghai Eye HospitalSchool of MedicineTongji UniversityShanghai 200331P.R.China

Pathological myopia(PM)is a severe ocular disease leading to *** a traditional noninvasive diagnostic method,fundus color photography(FCP)is widely used in detecting PM due to its highfidelity and ***,manual examination of fundus photographs for PM is.time-consuming and prone to high error *** automated detection technologies have yet to study the detailed classification in diagnosing different stages of PM *** this paper,we proposed an intelligent system which utilized Resnet101 technology to multi-categorically diagnose PM by classifying FCPs with different stages of *** system subdivided different stages of PM into eight subcategories,aiming to enhance the precision and e±ciency of the diagnostic *** achieved an average accuracy rate of 98.86%in detection of PM,with an area under the curve(AUC)of 98.96%.For the eight subcategories of PM,the detection accuracy reached 99.63%,with an AUC of 99.98%.Compared with other widely used multi-class models such as VGG16,Vision transformer(VIt),E±cientNet,this system demonstrates higher accuracy and *** artificial intelligence system is designed to be easily integrated into existing clinical diagnostic tools,providing an e±cient solution for large-scale PM screening.

关键词： Fundus color photography pathological myopia deep learning Resnet101.