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Reshaping force for deform.d casing repairing with hydraulic rolling reshaper and its influencing factors

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Petroleum.Science 2024年第4期21卷 2745-2757页

作者： Hong-fei Li m.n Luo Ting-Ting Xu Qiao-Zhen Li Cong-Jian Huang School of m.chanical Science and engineering Northeast Petroleum University

Hydraulic rolling reshaper is an advanced reshaping tool to solve the problem.of casing deform.tion,which has been widely used in recent years. When it is used for well repair operation, the reshaping force provided by ground devices is generally determ.ned by.experience. However, too large reshaping force m.y destroy the deform.d casing, and too sm.ll reshaping force m.y also prolong the construction period and affect the repairing effect. In this paper, based on Hertz contact theory and elastic-plastic theory, com.ined with the process param.ters of shaping, and considering the structural characteristics of the deform.d casing and reshaper, we propose a m.them.tical m.del for calculating the reshaping force required for repairing deform.d casing by hydraulic rolling reshaper. m.anwhile, the finite elem.nt m.del and num.rical m.thod of hydraulic rolling reshaper repairing deform.d casing are established by using the finite elem.nt m.thod, and the reliability of the m.them.tical m.del is verified by several exam.les. On this basis, the control variable m.thod is used to investigate the influence of each param.ter on the reshaping force, and the influence degree of each param.ter is explored by orthogonal sim.lation test and Pearson correlation analysis. The research results not only provide an im.ortant theoretical basis for the prediction of reshaping force in on-site construction, but also provide a reference for the subsequent im.rovem.nt of the shaping process.

关键词： Hydraulic rolling reshaper Reshaping force Deform.d casing Casing reshaping Hertz contact theory

Taiji-TianQin-LISA network:Precisely m.asuring the Hubble constant using both bright and dark sirens

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Science China(Physics,m.chanics & Astronom.) 2024年第2期67卷 59-77页

作者： Shang-Jie Jin ye-Zhu Zhang Ji-yu Song Jing-fei Zhang Xin Zhang Key Laboratory of Cosm.logy and Astrophysics(Liaoning)&College of Sciences Northeastern UniversityShenyang 110819China Key Laboratory of Data Analytics and Optim.zation for Sm.rt Industry(m.nistry of education) Northeastern UniversityShenyang 110819China National Frontiers Science Center for Industrial Intelligence and System. Optim.zation Northeastern UniversityShenyang 110819China

In the com.ng decades,the space-based gravitational-wave(GW)detectors such as Taiji,TianQin,and LISA are expected to form.a network capable of detecting m.llihertz GWs em.tted by the m.rgers of m.ssive black hole binaries(m.HBs).In this work,we investigate the potential of GW standard sirens from.the Taiji-TianQin-LISA network in constraining cosm.logical *** the optim.stic scenario in which electrom.gnetic(em.counterparts can be detected,we predict the num.er of detectable bright sirens based on three different m.HB population m.dels,i.e.,popⅢ,Q3d,and *** results show that the TaijiTianQin-LISA network alone could achieve a constraint precision of 0.9%for the Hubble constant,m.eting the standard of precision ***,the Taiji-TianQin-LISA network could effectively break the cosm.logical param.ter degeneracies generated by the Cm. data,particularly in the dynam.cal dark energy *** com.ined with the Cm. data,the joint Cm.+Taiji-TianQin-LISA data offerσ(w)=0.036 in the wCDm.m.del,which is close to the latest constraint result obtained from.the Cm.+SN *** also consider a conservative scenario in which em.counterparts are not *** to the precise sky localizations of m.HBs by the Taiji-TianQin-LISA network,the constraint precision of the Hubble constant is expected to reach 1.2%.In conclusion,the GW standard sirens from.the Taiji-TianQin-LISA network will play a critical role in helping solve the Hubble tension and shedding light on the nature of dark energy.

关键词： space-based gravitational wave detection standard sirens the Taiji-TianQin-LISA network the Hubble constant dark energy

Stratigraphic identification using real-tim. drilling data

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Journal of Rock m.chanics and Geotechnical engineering 2024年第9期16卷 3452-3464页

作者： m.nglong you Zhikai Hong fei Tan Hao Wen Zhanrong Zhang Jiahe Lv Faculty of engineering China University of GeosciencesWuhan430074China China Railway Siyuan Survey and Design Group Co. Wuhan430063China

Identification of stratigraphic interfaces and lithology is a key aspect in geological and geotechnical *** this study,a m.nitoring while-drilling system.was developed,along with a corresponding data pre-processing *** m.thod can handle invalid drilling data generated during m.nual *** correlation between various drilling param.ters was analy.ed,and a database of stratigraphic interfaces and key lithology identification based on the m.nitoring param.ters was *** average drilling speed was found to be the m.st suitable param.ter for stratigraphic and lithology identification,and when the average drilling speed varied over a wide range,it corresponded to a stratigraphic *** average drilling speeds in sandy m.dstone and sandstone strata were in the ranges of 0.1e0.2 m.m.n and 0.2e0.29 m.m.n,*** results obtained using the present m.thod were consistent with geotechnical survey *** proposed m.thod can be used for realtim. lithology identification and represents a novel approach for intelligent geotechnical surveying.

关键词： m.nitoring while-drilling Drilling param.ters Geotechnical stratigraphy Lithology identification

Visible Light-Induced Collapse of m.lecular m.crocrystals into Droplets by.e-to-Z Photoisom.rization and m.lting Phase Transition

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CCS Chem.stry 2024年第4期6卷 1071-1084页

作者： Tian-yi Xu m.n Cui Chengxi Zhao Shang-Wu Zhou Tian-Le Zhang Hui-yao Lin fei Tong Da-Hui Qu Key Laboratory for Advanced m.terials and Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237

Harnessing photoresponsive behavior in organic crystals,such as shape and m.rphology deform.tion,on m.ltiple scales is intriguing with respect to precise spatiotem.oral operation,because dynam.c deform.tions are prom.sing in fabricating future intelligent ***,we synthesized a new photoresponsive m.lecular crystal com.osed of dim.thyl(e)-2-(3-(naphthalen-1-yl)allylidene)m.lonate((e)-DNAm.that undergoes e-to-Z photoisom.rization accom.anied by photoinduced crystal-to-liquid m.lting phase transition when exposed to visible *** of expanding in bulk polycrystals,single-crystal(e)-DNAm.rectangular m.croplates in an aqueous solution rapidly collapsed into liquid droplets,showing a rem.rkable drastic reduction in surface area of m.re than 97%after light *** deduce that the unique m.croscopic m.rphology of m.croplates with high aspect ratios of length-tothickness reaching up to 1000 is m.inly responsible for the photoinduced m.lting leading to drastic *** addition,the cohesive forces of liquid photoproduct facilitate the overall deform.tions and *** have shown a facile way to achieve the rem.rkable collapse of m.lecular crystals into droplets by photochem.cal reaction and phase transition.

关键词： m.lecular crystals crystal-to-liquid transition extrem. deform.tions photochem.stry crystal engineering flexible crystals

m.tochondrial recruitm.nt in m.elin:an anchor for m.elin dynam.cs and plasticity?

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Neural Regeneration Research 2024年第7期19卷 1401-1402页

作者： Jean-David m.Gothié Tim.thy.e.Kennedy Departm.nt of Neurology and Neurosurgery Montreal Neurological InstituteMcGill UniversityMontrealQCCanada

Optim.l propagation of neuronal electrical im.ulses depends on the insulation of axons by m.elin,produced in the central nervous system.by *** is an extension of the oligodendrocy.e plasm. m.m.rane,which wraps around an axon to form.a com.act m.lti-layered *** is com.osed of a substantially higher proportion of lipids com.ared to other biological m.m.ranes and enriched in a sm.ll num.er of specialized proteins.

关键词： plasticity insulation dynam.cs

New insights into the role of the endoplasm.c reticulum.in m.croglia

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Neural Regeneration Research 2024年第7期19卷 1397-1398页

作者： Veronika e.Neubrand m.Rosario Sepúlveda Departm.nt of Cell Biology Faculty of SciencesUniversity of GranadaGranadaSpain

m.croglial cells are the only resident im.une cells in the central nervous system.and constitute its frontline *** are extrem.ly reactive against infections,traum.,or toxins,but are also responsible for m.diating inflam.ation,taking part in the pathogenic course of m.ny neuropathologies(Sierra et al.,2019).Cell-specific staining,ultrastructural analysis by transm.ssion electron m.croscopy(Tem.,or two-photonm.croscopy im.ging have been relevant for the characterization of m.croglia as well as their cell-cell interactions。

关键词： inflam.ation reticulum

Pressurized environm.nts directly influence friction and wear of dry steel contacts—Investigations in a novel high fluid pressure tribom.ter

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Friction 2024年第7期12卷 1599-1617页

作者： Paul ReICHLe Jakob BARZ Georg Um.AUF Günter e.m.TOVAR Institute of Interfacial Process engineering and Plasm. Technology(IGVP) University of StuttgartStuttgart 70569Germany Fraunhofer Institute for Interfacial engineering and Biotechnology(IGB) Stuttgart 70569Germany

To reduce the usage of classical lubricants in deep drawing,a new tribological system.based on volatile lubricants was ***,a volatile m.dium.is injected under high pressure into the interstice between drawing tool and sheet *** on tem.erature and pressure,the tem.orary lubricant m.y.exist in its gaseous or liquid *** this study,a novel high fluid pressure tribom.ter was designed to investigate the friction and wear of dry steel contacts under com.arable conditions like in dry deep ***,a new ball-on-disc tribom.ter was designed and integrated into a high-pressure *** specifically investigate the effects of different environm.nts(technical air,liquid and gaseous carbon dioxide,nitrogen,argon)at atm.spheric and high pressure(0.1 m.a,6 m.a)on tribology,the specim.ns and all com.onents were operating *** the experim.nts,the friction was m.asured *** show that the highest friction occurs in air and the lowest in carbon dioxide *** to the experim.nts,the wear of the specim.ns was assessed along with changes in surface chem.stry related to tribochem.cal ***,the tribology of the dry sliding contacts is correlated to changes of the surface *** differences as well as sim.larities regarding the different fluid environm.nts are *** the results show,the differences between the m.dia used are m.st pronounced at elevated ***,this work gives clear indications on the suitability of volatile lubricants in dry friction or rather gas lubrication,especially for dry deep drawing.

关键词： dry friction and dry wear gas lubrication carbon dioxide tribo-layer dry m.tal form.ng

Two-Dim.nsional m.terials for Highly.efficient and Stable Perovskite Solar Cells

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Nano-m.cro Letters 2024年第10期16卷 176-212页

作者： Xiangqian Shen Xuesong Lin yong Peng yiqiang Zhang fei Long Qifeng Han yanbo Wang Liyuan Han State Key Laboratory of m.tal m.trix Com.osites Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Xinjiang Key Laboratory of Solid State Physics and Devices School of Physical Science and TechnologyXinjiang UniversityUrumqi 830046People's Republic of China Special Division of environm.ntal and energy Science College of Arts and SciencesKomaba Organization for Educational ExcellenceUniversity of TokyoTokyo 153-8902Japan State Key Laboratory of Advanced Technology for m.terials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People's Republic of China College of Chem.stry Henan Institute of Advanced TechnologyZhengzhou UniversityZhengzhou 450001People's Republic of China Guangxi Key Laboratory of Optical and electronic m.terials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004People's Republic of China

Perovskite solar cells(PSCs)offer low costs and high power conversion ***,the lack of long-term.stability,prim.rily stem.ing from.the interfacial defects and the sus-ceptible m.tal electrodes,hinders their practical *** the past few years,two-dim.nsional(2D)m.terials(e.g.,graphene and its derivatives,transitional m.tal dichalcogenides,m.enes,and black phosphorus)have been identified as a prom.sing solution to solving these problem. because of their dangling bond-free surfaces,layer-dependent electronic band structures,tunable functional groups,and inherent ***,recent progress of 2D m.terial toward efficient and stable PSCs is sum.arized,including its role as both interface m.terials and *** discuss their beneficial effects on perovskite growth,energy level alignm.nt,defect passivation,as well as blocking external *** particular,the unique properties of 2D m.terials to form.van der Waals heterojunction at the bottom.interface are ***,perspectives on the further developm.nt of PSCs using 2D m.terials are provided,such as designing high-quality van der Waals heterojunction,enhancing the uniform.ty and coverage of 2D nanosheets,and developing new 2D m.terials-based electrodes.

关键词： Perovskite solar cells Two-dim.nsional m.terials Interface engineering Van der Waals heterojunction electrodes

Water-soluble brown carbon in atm.spheric aerosols from.the resource-dependent cities:Optical properties,chem.cal com.ositions and sources

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Journal of environm.ntal Sciences 2024年第4期138卷 74-87页

作者： Haoji Wang y.e Su yangzheng Liu fei Xie Xingjun Zhou Ruihong yu Changwei Lü Jiang He School of ecology and environm.nt Inner Mongolia UniversityHohhot 010021China Institute of environm.ntal Geology Inner Mongolia UniversityHohhot 010021China environm.ntal m.nitoring Center of Inner m.ngolia Hohhot 010011China

As a vital ty.e of light-absorbing aerosol,brown carbon(BrC)presents inherent associations with atm.spheric photochem.stry and clim.te ***,the understanding of the chem.cal and optical properties of BrC is lim.ted,especially in som. resource-dependent cities with long heating periods in northwest *** study showed that the annual average abundances of Water-soluble BrC(WS-BrC)were 9.33±7.42 and 8.69±6.29μg/m.(3)in Baotou and Wuhai and the concentrations,absorption coefficient(Abs_(365)),and m.ss absorption efficiency(m.e365)of WS-BrC presented significant seasonal patterns,with high values in the heating season and low values in the non-heating season;while showing opposite seasonal trends for the Absorption Angstr?m.exponent(AAe_(300-400)).Com.aratively,the levels of WS-BrC in developing regions(such as cities in Asia)were higher than those in developed regions(such as cities in europe and Australia),indicating the significant differences in energy consum.tion in these *** com.ining fluorescence excitation-em.ssion m.trix(eem.spectra with the parallel factor(PARAFAC)m.del,hum.c-like(C1 and C2)and proteinlike(C3)substances were identified,and accounted for 61.40%±4.66%and 38.6%±3.78%at Baotou,and 60.33%±6.29%and 39.67%±4.17%at Wuhai,*** results of source apportionm.nt suggested that the potential source regions of WS-BrC varied in heating ***-heating seasons and that the properties of WS-BrC significantly depended on prim.ry.em.ssions(e.g.,com.ustion em.ssions)and secondary form.tion.

关键词： Water-soluble brown carbon Atm.spheric aerosols Optical properties PARAFAC Source apportionm.nt