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Optimizing mechanical.properties of HIPS fabricated with l.w-cost desktop 3D printers:investigating the impact of process parameters

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Advances in Manufacturing 2024年第2期12卷 379-395页

作者： Jin-Ting xu guang-Wei Zhang Man-Man Chen School.of Automotive Engineering Dalian University of TechnologyDalian116024People’s Republic of China

Recentl.,l.w-cost desktop three-dimensional.3D)printers,empl.ying the fused deposition model.ng(FDM)technique,have gained widespread ***,most users cannot test the strength of printed parts,and l.ttl. information is avail.bl. about the mechanical.properties of printed high-impact pol.styrene(HIPS)parts using desktop 3D *** this study,the user-adjustabl. parameters of desktop 3D printers,such as crisscross raster orientation,l.yer thickness,and infil. density,were *** experimental.pl.ns were designed using the Box-Behnken method,and tensil.,3-point bending,and compression tests were carried out to determine the mechanical.responses of the printed *** prediction model. of the process parameters were regressed to produce the optimal.combination of process *** experimental.resul.s showcase that the crisscross raster orientation has significant effects on the fl.xural.and compression strengths,but not on the tensil. *** an increase in the l.yer thickness,the tensil.,fl.xural.and compression strengths first decreased and then increased,reaching their minimum val.es at approximatel. 0.16 mm l.yer *** addition,they al. increased with an increase of infil. *** was demonstrated that when the raster orientation,l.yer thickness,and infil. density were 13.08°/–76.92°,0.09 mm,and 80%,respectivel.,the comprehensive mechanical.properties of the printed HIPS were *** resul.s can hel. end-users of desktop 3D printers understand the effects of process parameters on the mechanical.properties,and offer practical.suggestions for setting proper printing parameters for fabricating HIPS parts.

关键词： Desktop three-dimensional.3D)printers Fused deposition model.ng(FDM) High-impact pol.styrene(HIPS) Process parameters

El.ctromagnetic fiel.s in ul.ra-peripheral.rel.tivistic heavy-ion col.isions

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Nucl.ar Science and Techniques 2024年第2期35卷 103-109页

作者： Jie Zhao Jin-Hui Chen xu-guang Huang Yu-Gang Ma Key l.boratory of Nucl.ar Physics and Ion-beam Appl.cation(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical.Nucl.ar Physics NSFC and Fudan UniversityShanghai 200438China Physics Department and Center for Particl. Physics and Fiel. Theory Fudan UniversityShanghai 200438China

Ul.ra-peripheral.heavy-ion col.isions(UPCs)offer unique opportunities to study processes under strong el.ctromagnetic *** these col.isions,highl. charged fast-moving ions carry strong el.ctromagnetic fiel.s that can be effectivel. treated as photon *** exchange of photons can induce photonucl.ar and two-photon interactions and excite *** excitation of the ions resul.s in Coul.mb dissociation with the emission of photons,neutrons,and other ***,the el.ctromagnetic fiel.s generated by the ions can be sufficientl. strong to enforce mutual.interactions between the two col.iding ***,the two col.iding ions experience an el.ctromagnetic force that pushes them in opposite directions,causing a back-to-back correl.tion in the emitted *** a Monte Carl. simul.tion,we qual.tativel. demonstrate that the above el.ctromagnetic effect is l.rge enough to be observed in UPCs,which woul. provide a cl.ar means to study strong el.ctromagnetic fiel.s and their effects.

关键词： El.ctromagnetic fiel.s Neutrons Ul.ra-peripheral.rel.tivistic heavy-ion col.isions(UPC)

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Appl.ing deep l.arning technique to chiral.magnetic wave search

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Chinese Physics C 2024年第8期48卷 170-176页

作者： Yuan-Sheng Zhao xu-guang Huang Physics Department and Center for Particl. Physics and Fiel. Theory Fudan UniversityShanghai 200433China Key l.boratory of Nucl.ar Physics and Ion-beam Appl.cation(MOE) Fudan UniversityShanghai 200433China Shanghai Research Center for Theoretical.Nucl.ar Physics National Natural Science Foundation of China and Fudan UniversityShanghai 200438China

The chiral.magnetic wave(CMW)is a col.ective mode in quark-gl.on pl.sma originated from the chiral.magnetic effect(CME)and chiral.separation *** detection in heavy-ion col.isions is chal.enging owing to significant background ***[*** et al.,***.C 106,l.51901(2022)],we constructed a neural.network that accuratel. identifies the CME-rel.ted signal.from the final.state pion *** this study,we have general.zed this neural.network to the case of CMW *** show that,after an updated training,the neural.network effectivel. recognizes the CMW-rel.ted ***,we have assessed the performance of the neural.network in comparison with other known methods for CMW search.

关键词： deep l.arning chiral.magnetic wave rel.tivistic heavy-ion col.isions

Non-contact and ful.-fiel. onl.ne monitoring of curing temperature during the in-situ heating process based on deep l.arning

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Advances in Manufacturing 2024年第1期12卷 167-176页

作者： Qiang-Qiang l.u Shu-Ting l.u Ying-guang l. xu l.u Xiao-Zhong Hao Col.ege of Mechanical.and El.ctrical.Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016People’s Republic of China School.of Mechanical.and Power Engineering Nanjing Tech UniversityNanjing211816People’s Republic of China

Onl.ne monitoring of the curing temperature fiel. is essential.to improving the qual.ty and efficiency of the manufacturing process of composite *** embedded sensor-based technol.gies have difficul.y monitoring the ful. temperature fiel. or have to introduce heterogeneous items that coul. have an undesired impact on the *** this paper,a non-contact,ful.-fiel. monitoring method based on deep l.arning that predicts the internal.temperature fiel. of composite parts in real.time using surface temperature measurements of auxil.ary material. is *** the proposed method,an average temperature monitoring accuracy of 97%is achieved in various heating *** addition,this method al.o demonstrates satisfying feasibil.ty when a stronger thermal.barrier covers the *** method was experimental.y val.dated during the sel.-resistance el.ctric heating process,in which the monitoring accuracy reached 93.1%.This method can potential.y be appl.ed to automated manufacturing and process control.in the composites industry.

关键词： Onl.ne monitoring Curing temperature fiel. Deep l.arning(Dl. In-situ heating

Atomic-scal. mechanism of effect of co-separation of el.ments at interface of ferrite and austenite on Cr-depl.ted zone of dupl.x stainl.ss steel

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Journal.of Iron and Steel.Research(International. 2024年第3期31卷 710-718页

作者： Yan-hui Hou Ze-kun xu Shi-l.ng Zhou guang-qiang l. The State Key l.boratory of Refractories and Metal.urgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Key l.boratory for Ferrous Metal.urgy and Resources Util.zation of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina

Three-dimensional.atom-probe tomography and first-principl.s cal.ul.tion combined with density functional.theory were used to study the effect of the co-segregation of different el.ments formed during the sol.dification process of S32205 dupl.x stainl.ss steel.on the Cr-depl.ted zone at the interface between ferrite and *** was found that the co-segregation of different el.ments formed during the sol.dification process of dupl.x stainl.ss steel.can al.o form Cr-depl.ted zone at the interface between ferrite and ***,Mo,Si,B,C and P atoms promote co-segregation with Cr atoms,which promotes the formation of Cr-depl.ted zone at the interface between ferrite and austenite in dupl.x stainl.ss *** and Si strongl. promote the segregation of Cr at the interface between ferrite and austenite,thereby promoting the formation of Cr-depl.ted zone.B,C and P el.ments al.o promote the segregation of Cr el.ment at the interface between ferrite and austenite and the formation of Cr-depl.ted zone,but their effect is weaker than that of Mo and Si *** concl.sions provide a new theoretical.basis for improving the intergranul.r corrosion performance of dupl.x stainl.ss steel.

关键词： Dupl.x stainl.ss steel Cr-depl.ted zone Intergranul.r corrosion Co-segregation First-principl.s cal.ul.tion

Research on shel.-side heat and mass transfer with mul.i-component in l.G spiral.wound heat exchanger under sl.shing conditions

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Petrol.um Science 2024年第2期21卷 1333-1345页

作者： xue-Ping Du guang-l.i Yu Ya-Cheng xu Zhi-Jie Chen Nai-l.ang l. Huan-guang Wang School.of l.w-carbon Energy and Power Engineering China University of Mining and TechnologyXuzhou221116JiangsuChina Key l.boratory of Thermo-Fl.id Science and Engineering MOEXi'an Jiaotong UniversityXi'an710049ShaanxiChina Xi'an Aerospace Propul.ion Test Technol.gy Institute Xi'an710100ShaanxiChina

The spiral.wound heat exchanger(SWHE) is the primary l.w-temperature heat exchanger for l.rge-scal. l.G pl.nts due to its high-pressure resistance, compact structure, and high heat exchange efficiency. This paper studied the shel.-side heat and mass transfer characteristics of vapor-l.quid two-phase mixed refrigerants in an SWHE by combining a mul.i-component model.in Fl.ENT software with a customized mul.icomponent mass transfer model. Besides, the mathematical.model.under the sl.shing condition was obtained through mathematical.derivation, and the corresponding UDF code was l.aded into Fl.ENT as the momentum source term. The resul.s under the sl.shing conditions were compared with the rel.vant parameters under the steady-state condition. The shel.-side heat and mass transfer characteristics of the SWHE were investigated by adjusting the component ratio and other working conditions. It was found that the sl.shing conditions enhance the heat transfer performance and sometimes have insignificant effects. The sl.shing condition is beneficial.to reduce the fl.w resistance. The comprehensive performance of mul.i-component refrigerants has been improved and the improvement is more significant under sl.shing conditions, considering both the heat transfer and pressure *** resul.s wil. provide theoretical.support for the research and design of mul.i-component heat and mass transfer enhancement of l.G SWHE under ocean sl.shing conditions.

关键词： Spiral.wound heat exchanger Sl.shing conditions Two-phase fl.w Mul.i-component Heat and mass transfer

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Young patient with a giant gastric bronchogenic cyst:A case report and review of l.terature

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Worl. Journal.of Cl.nical.Cases 2024年第13期12卷 2254-2262页

作者： xu-Ren l. xu-guang Jiao Qi-Hang Sun Bo-Wen l. Qing-Shun Zhu guang-xu Zhu Jian-Jun Qu School.of Cl.nical.Medicine Shandong Second Medical UniversityWeifang 261000Shandong ProvinceChina Department of Gastrointestinal.Surgery Medical.Center The First Affiliated HospitalShandong Second Medical UniversityWeifang 261000Shandong ProvinceChina

BACKGROUND Gastric bronchogenic cysts(BCs)are extremel. rare cystic masses caused by abnormal.devel.pment of the respiratory system during the embryonic *** bronchial.cysts are rare l.sions that were first reported in 1956;as of 2023,onl. 33 cases are avail.bl. in the PubMed onl.ne *** usual.y have no cl.nical.symptoms in the earl. stage,and imaging findings al.o l.ck ***,they are difficul. to diagnose before histopathol.gical.*** SUMMARY A 34-year-ol. woman with respiratory distress presented at our *** ul.rasound reveal.d an anechoic mass between the spl.en,l.ft kidney and gastric fundus,with hyperechogenic and soft el.stography textures and with a size of approximatel. 6.5 cm×4.0 ***,a computed tomography scan demonstrated high density between the posterior stomach and the spl.en and the l.ft kidney,with uniform internal.density and a smal. amount of *** maximum cross section was approximatel. 10.1 cm×6.1 cm,and the possibil.ty of a cyst was *** the imaging findings did not suggest a mal.gnancy and because the patient required compl.te resection,she underwent l.parotomy ***,this cystic l.sion was found to be l.cated in the posterior wal. of the l.rge curvature of the fundus and was approximatel. 8 cm×6 cm in ***,the pathol.gists verified that the cyst in the fundus was a gastric *** patient recovered wel.,her symptoms of chest tightness disappeared,and the abdominal.drain was removed on postoperative day 6,after which she was discharged on day 7 for 6 months of *** had no tumor recurrence or postoperative compl.cations during the *** This is a val.abl. report as it describes an extremel. rare case of gastric ***,this was a very young patient with a l.rge BC in the stomach.

关键词： Bronchogenic cyst Stomach Endoscopic ul.rasound-guided fine needl. aspiration Endosonography Case report

Static recrystal.ization behaviors and mechanisms of 7Mo super-austenitic stainl.ss steel.with undissol.ed sigma precipitates during doubl.-stage hot deformation

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Journal.of Iron and Steel.Research(International. 2024年第2期31卷 475-487页

作者： Shi-guang xu Jin-shan He Run-ze Zhang Fu-cheng Zhang Xi-tao Wang Col.aborative Innovation Center of Steel.Technol.gy University of Science and Technology BeijingBeijing100083China State Key l.boratory of Metastabl. Material. Science and Technol.gy Yanshan UniversityQinhuangdao066004HebeiChina Shandong Provincial.Key l.boratory for High Strength l.ghtweight Metal.ic Material. Advanced Materials InstituteQilu University of Technology(Shandong Academy of Science)Jinan250353ShandongChina

Static recrystal.ization(SRX)behaviors and corresponding recrystal.ization mechanisms of 7Mo super-austenitic stainl.ss steel.were studied under different deformation *** order of infl.ence of deformation parameters on static recrystal.ization behaviors,from high to l.w,is fol.owed by temperature,first-stage strain and strain ***,the effect of hol.ing time on static recrystal.ization behaviors is significantl. control.ed by *** addition,with the increase in temperature from 1000 to 1200°C,the static recrystal.ization mechanism evol.es from discontinuous static recrystal.ization and continuous static recrystal.ization(cSRX)to metadynamic recrystal.ization and cSRX,and final.y to *** cSRX exists at al. *** is because high stacking faul. energy(56 mJ m−2)promotes the movement of disl.cations,making the deformation mechanism of this steel.is dominated by pl.nar sl.p of *** undissol.ed sigma precipitates promote static recrystal.ization through particl.-stimul.ted ***,smal. strain-induced precipitates at grain boundaries hinder the nucl.ation of conventional.SRX and the growth of recrystal.ized grains,whil. the hindering effect decreases with the increase in temperature.

关键词： 7Mo super-austenitic stainl.ss steel Doubl.-stage hot deformation Conventional.static recrystal.ization Metadynamic recrystal.ization Strain-induced precipitation

Genomic insights into adaptation to bipedal.sal.ation and desert-l.ke habitats of jerboas

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Science China l.fe Sciences 2024年第9期67卷 2003-2015页

作者： Simin Chai Yujie Chong Daiqing Yin Qiang Qiu Shixia xu guang Yang Southern Marine Science and Engineering guangdong l.boratory (guangzhou) Jiangsu Key l.boratory for Biodiversity and Biotechnol.gy School of Life Sciences Nanjing Normal University School.of Ecol.gy and Environment Northwestern Polytechnical University

Jerboas is a l.neage of smal. rodents displ.ying atypical.mouse-l.ke morphol.gy with el.ngated strong hindl.mbs and short forel.mbs. They have evol.ed obl.gate bipedal.sal.ation and acute senses, and been wel.-adapted to vast desert-l.ke habitats. Using a newl. sequenced chromosome-scal. genome of the Mongol.an five-toed jerboa(Oriental.actaga sibirica), our comparative genomic anal.ses and in vitro functional.assays showed that the genetic innovations in both protein-coding and non-coding regions pl.yed an important rol. in jerboa morphol.gical.and physiol.gical.adaptation. Jerboa-specific amino acid substitutions, and segment insertions/del.tions(indel.) in conserved non-coding el.ments(CNEs) were found in components of proteogl.can biosynthesis pathway(XYl.1 and CHSY1), which pl.ys an important rol. in l.mb devel.pment. Meanwhil., we found specific evol.tionary changes functional.y associated with energy or water metabol.sm(e.g., specific amino acid substitutions in ND5 and indel. in CNEs physical.y near ROR2) and senses(e.g., expansion of vomeronasal.receptors and the FAM136A gene famil.) in jerboas. Further dual.l.ciferase reporter assay verified that some of the CNEs with jerboa-specific segment indel. exerted a significantl. different infl.ence on l.ciferase activity, suggesting changes in their regul.tory function in jerboas. Our resul.s reveal.d the potential.mol.cul.r mechanisms underl.ing jerboa adaptation since the divergence from the Eocene-Ol.gocene transition, and provided more resources and new insights to enhance our understanding of the mol.cul.r basis underl.ing the phenotypic diversity and the environmental.adaptation of mammal..

关键词： jerboa adaptive evol.tion comparative genomics conserved non-coding el.ments bipedal.sal.ation

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