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Toward a fundamental understanding of the heterogeneous multiphysics behaviors of silicon monoxide/graphite composite anodes

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Carbon Energy 2024年第1期6卷 142-158页

作者： Xiang Gao Suli li Jiachen xue Dianyang Hu Jun Xu Department of Mechanical Engineering and Engineering Science University of North Carolina at CharlotteCharlotteNorth CarolinaUSA Vehicle Energy and Safety Laboratory(VESL) Battery ComplexityAutonomous Vehicleand Electrification(BATT CAVE)Research CenterUniversity of North Carolina at CharlotteCharlotteNorth CarolinaUSA Zhuhai CosMX Battery Co.Ltd. ZhuhaiGuangdongChina School of Data Science University of North Carolina at CharlotteCharlotteNorth CarolinaUSA

Silicon monoxide(SiO)(silicon[Si]mixed with silicon dioxide[SiO_(2)])/graphite(Gr)composite material is one of the most commercially promising anode materials for the next generation of high-energy-density lithium-ion *** major bottleneck for SiO/Gr composite anode is the poor cyclability arising from the stress/strain behaviors due to the mismatch between two heterogenous materials during the lithiation/delithiation *** date,a meticulous and quantitative understanding of the highly nonlinear coupling behaviors of such materials is still ***,an electro–chemo–mechanics-coupled detailed model containing particle geometries is *** underlying mechanism of the regulation between SiO and Gr components during electrochemical cycling is quantitatively *** discover that increasing the SiO weight percentage(wt%)reduces the utilization efficiency of the active materials at the same 1C rate charging and enhances the hindering effects of stress-driven flux on *** addition,the mechanical constraint demonstrates a balanced effect on the overall performance of cells and the local behaviors of *** study provides new insights into the fundamental interactions between SiO and Gr materials and advances the investigation methodology for the design and evaluation of next-generation high-energydensity batteries.

关键词： interactions lithium-ion batteries mechanical constraint multiphysics modeling Si-based anode

Exploring multiple phases and first-order phase transitions in Kármán Vortex Street

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Science China(Physics,Mechanics & Astronomy) 2024年第11期67卷 47-54页

作者： Xu li Xing Xiang Tingting xue limin Wang Xiaosong Chen School of Systems Science and Institute of Nonequilibrium Systems Beijing Normal UniversityBeijing 100875China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy ofSciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

Kármán Vortex Street, a fascinating phenomenon of fluid dynamics, has intrigued the scientific community for a long time. Many researchers have dedicated their efforts to unraveling the essence of this intriguing flow pattern. Here, we apply the lattice Boltzmann method with curved boundary conditions to simulate flows around a circular cylinder and study the emergence of Kármán Vortex Street using the eigen microstate approach, which can identify phase transition and its order-parameter. At low Reynolds number, there is only one dominant eigen microstate W_(1) of laminar flow. At Re_(c)^(1)= 53.6, there is a phase transition with the emergence of an eigen microstate pair W^(2,3) of pressure and velocity fields. Further at Re_(c)^(2)= 56, there is another phase transition with the emergence of two eigen microstate pairs W^(4,5) and W^(6,7). Using the renormalization group theory of eigen microstate,both phase transitions are determined to be first-order. The two-dimensional energy spectrum of eigen microstate for W^(1), W^(2,3) after Re_(c)^(1), W^(4-7) after Re_(c)^(2) exhibit-5/3 power-law behavior of Kolnogorov's K41 theory. These results reveal the complexity and provide an analysis of the Kármán Vortex Street from the perspective of phase transitions.

关键词： Kármán Vortex Street first-order phase transition eigen microstate approach renormalization group theory of eigen microstate

Development and Deformation Characteristics of Large Ancient Landslides in the Intensely Hazardous Xiongba-Sela Section of the Jinsha River, Eastern Tibetan Plateau, China

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Journal of Earth Science 2024年第3期35卷 980-997页

作者： Yiqiu Yan Changbao Guo Yanan Zhang Zhendong Qiu Caihong li xue li Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and Geological Safety Ministry of Natural ResourcesBeijing 100081China

The upstream Jinsha River,located in the eastern Tibetan Plateau,has been experiencing intense geological hazards characterized by a high density of ancient landslides,significant deformation and reactivation *** this study,remote sensing interpretation,field investigations,and Small Baseline Subset Interferometric Synthetic Aperture Radar(SBAS-InSAR)technologies have been *** a 17 km stretch of the Jinsha River,specifically in the Xiongba-Sela segment,16 large-scale ancient landslides were identified,9 of which are currently undergoing creeping ***,the Sela and Xiongba ancient landslides exhibit significant deformation,with a maximum deformation rate of-192 mm/yr,indicating a high level of sliding *** volume of the Sela ancient landslide is estimated to be 1.8×108 to 4.5×108 m3,and characterized by extensive fissures and long-term creeping *** SBAS-InSAR results revealed significant spatial variations in the deformation of the Sela ancient landslide,generally displaying two secondary zones of intense deformation,and landslide deformation exhibits nonlinear behavior with *** January 2016 and February 2022,Zone III1 on the southwest side of the Sela ancient landslide,experienced a maximum cumulative deformation of-857 mm,with a maximum deformation rate of-108 mm/*** III2,on the northeast side of the Sela ancient landslide,the maximum cumulative deformation was-456 mm,with a maximum deformation rate of-74 mm/yr;among these,the H2 and H4 secondary bodies on the south side of III1 are in the accelerative deformation stage and at the Warn warning *** propose that the large-scale flood and debris flow disasters triggered by the Baige landslide-dammed lake-dam broken disaster chain in Tibetan Plateau during October and November 2018 caused severe erosion at the foot of downstream *** far-field triggering effect accelerated the creep of the downstream ancient ***,the defo

关键词： Jinsha River SBAS-InSAR landslides surface deformation disasters.

Intensified warming suppressed the snowmelt in the Tibetan Plateau

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Advances in Climate Change Research 2024年第3期15卷 452-463页

作者： Xiang li Peng CUI xue-Qin ZHANG Fang ZHANG Key Lab of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China China‒Pakistan Joint Research Center on Earth Sciences Chinese Academy of Sciences and Higher Education CommissionIslamabad 45320Pakistan

Understanding how hydrological factors interrelate is crucial when examining the impact of climate warming on ***,these connections are often overlooked,leading to an unclear relationship between temperature and *** study investigates the complex interplay between temperature and snowmelt in the Tibetan Plateau from 1961 to 2020,focusing on how extreme high-temperature events affect the frequency of extreme *** a structural equation model,we detected three temperature-related factors that predominantly influenced snowmelt and extreme *** annual average temperature was found to have a significant indirect impact on snowmelt,mediated by changes in snowfall,snow depth and snow *** contrast,high-temperature days(daily maximum temperatures exceeding the 90th percentile)and heat waves(at least three consecutive high-temperature days)negatively affected extreme snowmelt directly or *** direct effect of increasing extreme temperature events was associated with an earlier onset of high-temperature periods,which accelerated snowmelt and shortened the duration of extreme snowmelt ***,the reduction in snow cover owing to warming emerged as a main factor suppressing snowmelt and extreme snowmelt *** also revealed spatiotemporal variations in the temperature‒snowmelt relationship that highly depended on changes in snowmelt *** study elucidated why warming suppresses snowmelt and extreme snowmelt events in the Tibetan Plateau,highlighting the mediating roles of snow-related and phenological *** findings will provide scientific support for climate simulation and water management policymaking in alpine regions worldwide.

关键词： Climate change Extreme temperature Snowmelt Structural equation model Tibetan Plateau

Legumain-triggered aggregable gold nanoparticles for enhanced intratumoral retention

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Chinese Chemical Letters 2024年第7期35卷 388-393页

作者： Zhi li Wenpei li Shaoping Jiang chuan Hu Yuanyu Huang Maxim Shevtsov Huile Gao Shaobo Ruan Advanced Research Institute of Multidisciplinary Sciences School of Life ScienceBeijing Institute of TechnologyBeijing 100081China Key Laboratory of Drug Targeting and Drug Delivery System West China School of PharmacySichuan UniversityChengdu 610041China Institute of Cytology of Russian Academy of Sciences(RAS) St.Petersburg 194064Russia

Insufficient intratumoral retention of nanomedicines remains the major challenge for broad implementation in clinical ***,we proposed a legumain-triggered aggregable gold nanoparticle(GNP)delivery platform(GNPs-A&C).GNPs-A&C could form intratumoral or intracellular aggregates in response to the overexpressed *** aggregates with size increase not only could reduce back-flow from interstitial space to peripheral bloodstream but also could restrict the cellular exocytosis,leading to enhanced intratumoral *** vitro studies demonstrated that GNPs-A&C possessed an excellent legumain responsiveness and the increased size was closely relevant with legumain *** vivo studies demonstrated GNPs-A&C possessed slower clearance rate and much higher intratumoral retention within legumain-overexpressed tumor compared to non-aggregable NPs,regardless of intravenous or intratumoral *** importantly,this delivery platform significantly improved the chemotherapeutic effect of doxorubicin(DOX)towards subcutaneous xenograft C6 *** effectiveness of this stimulus-responsive aggregable delivery system provides a thinking for designing more intelligent size-tunable nanomedicine that can substantially improve intratumoral retention.

关键词： Legumain Size-tunable Enhanced retention Stimulus-responsive Nanomedicine

Modified FOLFIRINOX for unresectable locally advanced or metastatic gallbladder cancer,a comparison with GEMOX regimen

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Hepatobiliary Surgery and Nutrition 2021年第4期10卷 498-506页

作者： Xu-Ya Cui xue-chuan li Jiu-Jie Cui Xiang-Song Wu Lu Zou Xiao-ling Song Tai Ren Yi-Di Zhu Huai-Feng li Yang Yang Ke liu Xu-Sheng Han Zi-Yao Jia Wen-Guang Wu Xu-An Wang Wei Gong li-Wei Wang Mao-Lan li Ying-Bin liu Department of General Surgery Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina Department of Biliary-Pancreatic Surgery Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Shanghai Key Laboratory of Biliary Tract Disease Research ShanghaiChina State Key Laboratory of Oncogenes and Related Genes ShanghaiChina Shanghai Research Center of Biliary Tract Disease ShanghaiChina Shanghai Cancer Institute ShanghaiChina Department of Medical Oncology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina

Background:The first-line chemotherapy regimen for advanced gallbladder cancer(GBC)is gemcitabine plus platinum(GP),despite its efficacy is *** current investigation is a retrospective study to compare the safety and efficacy between the modified FOLFIRINOX(mFOLFIRINOX)and gemcitabine plus oxaliplatin(GEMOX)as the first-line chemotherapy for unresectable locally advanced or metastatic ***:The data of patients with unresectable locally advanced or metastatic GBC,who were treated with mFOLFIRINOX or GEMOX as the first-line therapy between April 2014 and April 2018 at Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine,were *** retrospective study evaluated the clinical characteristics,survival outcomes and adverse ***:A total of 44 patients(n=25 in mFOLFIRINOX,n=19 in GEMOX)were *** were no significant differences between groups in baseline *** median progression free survival(mPFS)was 5.0 months in the mFOLFIRINOX group and 2.5 months in the GEMOX group[P=0.021;hazard ratio(HR),0.499;95%CI,0.266 to 0.937].The median overall survival(mOS)was 9.5 months in the mFOLFIRINOX group and 7.0 months in the GEMOX group(P=0.019;HR,0.471;95%CI,0.239 to 0.929).Disease control rate(DCR)was 76.0%in the mFOLFIRINOX group and 47.4%in the GEMOX group(P=0.051).The rate of grade 3-4 adverse events was 48%in the mFOLFIRINOX group and 36.8%in the GEMOX group(P=0.459).The incidence of grade 3-4 neutropenia and diarrhea were more common in the mFOLFIRINOX group,while the incidence of grade 3-4 thrombocytopenia and peripheral neuropathy were more common in the GEMOX ***:mFOLFIRINOX might improve the poor prognosis of unresectable locally advanced or metastatic GBC,and the results need to be further verified by prospective clinical studies.

关键词： Gallbladder cancer(GBC) modified FOLFIRINOX(mFOLFIRINOX) gemcitabine plus oxaliplatin(GEMOX) chemotherapy

Exploration of microscopic physical processes of Z-pinch by a modified electrostatic direct implicit particle-in-cell algorithm

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Chinese Physics B 2024年第9期33卷 433-442页

作者： Kaixuan li Cheng Ning Ye Dong chuang xue Institute of Applied Physics and Computational Mathematics Beijing 100088China

For investigating efficiently the stagnation kinetic-process of Z-pinch,we develop a novel modified electrostatic implicit particle-in-cell algorithm in radial one-dimension for Z-pinch simulation in which a small-angle cumulative binary collision algorithm is *** our algorithm,the electric field in z-direction is solved by a parallel electrode-plate model,the azimuthal magnetic field is obtained by Ampere’s law,and the term for charged particle gyromotion is approximated by the cross product of the averaged velocity and magnetic *** simulation results of 2 MA deuterium plasma shell Zpinch,the mass-center implosion trajectory agrees generally with that obtained by one-dimensional MHD simulation,and the plasma current also closely aligns with the external *** phase space diagrams and radial-velocity probability distributions of ions and electrons are *** main kinetic characteristic of electron motion is thermal equilibrium and oscillation,which should be oscillated around the ions,while that of ion motion is implosion *** the region of stagnation radius,the radial-velocity probability distribution of ions transits from the non-equilibrium to equilibrium state with the current increasing,while of electrons is basically the equilibrium *** the initial ion density and current peak are not high enough,the ions may not reach their thermal equilibrium state through collisions even in its stagnation phase.

关键词： Z-pinch particle-in-cell ion heating charged particle collisions

Optimal production strategy for auto manufacturers with government subsidies in competitive environments

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Frontiers of Engineering Management 2024年第2期11卷 345-355页

作者： Jingjing xue Bin ZHENG Sijie li School of Economics and Management Nanjing Tech UniversityNanjing 211816China School of Economics and Management Southeast UniversityNanjing 211189China

Using the Hotelling model and evolutionary game theory,this paper studies the optimal production strategy of duopoly auto manufacturers and explores the impacts of two government policies(manufacturer and consumer subsidies)on strategies related to the production of electric vehicles(EVs)or fuel vehicles(FVs).The study finds that consumers’environmental preferences have direct effects on manufacturers’market shares and profits,which in turn,affect the manufacturers’production strategy ***,when consumer environmental preference is sufficiently high,both auto manufacturers will eventually choose to produce EVs;when it is moderate,only one with a cost advantage will choose to produce ***,when it is low,neither auto manufacturer will produce *** findings further reveal that the more significant the difference in EV production costs is,the more inclined auto manufacturers are to choose a different final stable *** of whether the government subsidizes manufacturers or consumers,the policy only works if subsidies reach a certain *** study also identifies the conditions under which government subsidies are considered more cost-effective.

关键词： supply chain management low-carbon emission electric vehicle subsidy evolutionary game theory

Social network learning efficiency in the principal-agent relationship

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Journal of Management Science and Engineering 2024年第2期9卷 193-219页

作者： chuan Ding Yilin Hong Yang li Peng liu School of Mathematics Southwestern University of Finance and EconomicsChengdu611130China S.C.Johnson College of Business Cornell UniversityIthacaNY14853USA

Under the bounded rationality assumption,a principal rarely provides an optimal contract to an *** from others is one way to improve such a *** paper studies the efficiency of social network learning(SNL)in the principal–agent *** first introduce the Cobb-Douglas production function into the classic Holmstrom and Milgrom(1987)model with a constant relative risk-averse agent and work out the theoretically optimal *** are then designed to model the SNL process based on profit gaps between contracts in a network of *** the uncertainty of the agent's labor output,we find that the principals can reach a consensus that tends to result in overcompensation compared to the optimal ***,this study examines how network attributes and model parameters impact learning efficiency and posits several summative *** simulation results validate these hypotheses,and we discuss the relevant economic implications of the observed changes in SNL efficiency.

关键词： Simulation Social network learning Principaleagent Reaching consensus Learning efficiency