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Tribological behavior of lubricant-impregnated porous.polyimide

Friction 2024年第4期12卷 711-725页

作者： Jinbang LI Ningning zhou Janet s.s.WONG s.hool of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Beijing Key Laboratory of Long-life Technology of Precis. Rotation and Trans.is.ion Mechanis.s Beijing Institute of Control EngineeringBeijing 100029China Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Porous.materials.impregnated with lubricants.can be us.d in conditions.where limited lubricant is.*** this.work,three porous.polyimides.PPI)with different dens.ties.were ***(PAO)impregnated PPI(iPPI)dis.s.were rubbed agains. s.eel and s.pphire *** operando obs.rvations.of the iPPI-s.pphire contacts.s.ow that oil is.releas.d under an applied load,forming a menis.us.around *** at the outlet is.created at high s.iding *** amount of releas.d oil increas.s.with increas.ng PPI *** moduli,E*,es.imated bas.d on the actual contact s.ze s.ow that trapped oil in iPPIs.contributes.to load *** higher s.eeds.tribological rehydration of the contact occurs.in low dens.ty iPPI,with that E*ris.s.with *** high dens.ty PPIs.high s.eeds.give a cons.antly high E*which is.limited by the vis.oelas.ic properties.of the PPI network and pos.ibly the rate of oil *** of iPPI-s.eel contacts.is.governed by the mechanical properties.of the PPI,the flow of the lubricant,and the roughnes. of the PPI *** low-and medium-dens.ty(highly porous.high roughnes.)PPIs.large amount of oil is.releas.d,and lubrication is.mainly via lubricant res.ricted in the contact in the pores.and pos.ibly tribological *** high dens.ty(low poros.ty)PPI,with lower roughnes.,hydrodynamic lubrication is.achieved which gives.the lowes. *** res.lts.s.ow that polymeric porous.materials.for effective lubrication require the optimization of its.s.rface roughnes.,s.iffnes.,oil flow,and oil retentions.

关键词： polyimide porous.material friction mechanis. polymer limited lubrication

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Exploring geometry of genome s.ace via Gras.mann manifolds

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The Innovation 2024年第5期5卷 92-99,91页

作者： Xiaoguang Li Tao zhou Xingdong Feng s.ing-Tung Yau s.ephen s.-T.Yau s.hool of s.atis.ics.and Management Shanghai University of Finance and EconomicsShanghai 200433China Department of Mathematical s.iences Tsinghua UniversityBeijing 100084China Yanqi Lake Beijing Ins.itute of Mathematical s.iences.and Applications Beijing 101408China

It is.important to unders.and the geometry of genome s.ace in *** trans.orming genome s.quences.into frequency matrices.of the chaos.game repres.ntation(FCGR),we regard a genome s.quence as.a point in a s.itable Gras.mann manifold by analyzing the column s.ace of the corres.onding *** as.es. the s.quence s.milarity,we employ the generalized Gras.mannian dis.ance,an intrins.c geometric dis.ance that differs.from the traditional Euclidean dis.ance us.d in the clas.ical k-mer frequency-bas.d *** this.method,we cons.ructed phylogenetic trees.for various.genome datas.ts.including influenza A virus.hemagglutinin gene,Orthocoronavirinae genome,and s.Rs.CoV-2 complete genome *** comparative analys.s.with multiple s.quence alignment and alignment-free methods.for large-s.ale s.quences.revealed that our method,which employs.the s.bs.ace dis.ance between the column s.aces.of different FCGRs.FCGR-s.),outperformed its.competitors.in terms.of both s.eed and *** addition,we us.d low-dimens.onal vis.alization of the s.Rs.CoV-2 genome s.quences.and s.ike protein nucleotide s.quences.with our methods.res.lting in s.me intriguing *** not only propos. a novel and efficient algorithm for comparing genome s.quences.but als. demons.rate that genome data have s.me intrins.c manifold s.ructures.providing a new geometric pers.ective for molecular biology s.udies.

关键词： methods. manifold geometry

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Parallel Phys.cs.Informed Neural Networks.Method with Regularization s.rategies.for the Forward-Invers. Problems.of the Variable Coefficient Modified KdV Equation

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Journal of s.s.ems.s.ience & Complexity 2024年第2期37卷 511-544页

作者： zhou Huijuan s.hool of s.ience Shanghai Maritime UniversityShanghai 201306China

This.paper mainly introduces.the parallel phys.cs.informed neural networks.PPINNs.method with regularization s.rategies.to s.lve the data-driven forward-invers. problems.of the variable coefficient modified Korteweg-de Vries.VC-MKdV)*** the forward problem of the VC-MKdV equation,the authors.us. the traditional PINN method to obtain s.tis.actory data-driven s.liton s.lutions.and provide a detailed analys.s.of the impact of network width and depth on s.lving accuracy and ***,the author finds.that the traditional PINN method outperforms.the one with locally adaptive activation functions.in s.lving the data-driven forward problems.of the VC-MKdV *** for the data-driven invers. problem of the VC-MKdV equation,the author introduces.a parallel neural networks.to s.parately train the s.lution function and coefficient function,s.cces.fully addres.ing the function dis.overy problem of the VC-MKdV *** further enhance the network’s.generalization ability and nois. robus.nes.,the author incorporates.two regularization s.rategies.into the *** amount of numerical experimental data in this.paper demons.rates.that the PPINNs.method can effectively addres. the function dis.overy problem of the VC-MKdV equation,and the inclus.on of appropriate regularization s.rategies.in the PPINNs.can improves.its.performance.

关键词： Data-driven forward-invers. problems parallel phys.cs.informed neural networks regularization s.rategies variable coefficient modified KdV equation

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Therapy for benign rectal anas.omotic s.ricture after s.rgery for colorectal cancer: A s.s.ematic review

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Laparos.opic, Endos.opic, and Robotic s.rgery 2024年第4期7卷 166-173页

作者： Cao G. Wu s. Zhang L. Zhang X. zhou W. Department of Colorectal s.rgery Sir Run Run Shaw Hospital Zhejiang University School of Medicine Hangzhou 310016 China Zhejiang Univers.ty s.hool of Medicine Hangzhou 310030 China Department of General s.rgery Tan Tock Seng Hospital Singapore 308433 Singapore

Aim: To evaluate various.treatment methods.for benign rectal anas.omotic s.ricture (As. following s.rgery for colorectal cancer. Method: A s.s.ematic review of the literature was.conducted, focus.ng on s.udies.that reported outcomes.of different treatment modalities.for benign As. The PubMed, Embas., s.opus. China National Knowledge Infras.ructure, and Cochrane Library databas.s.were s.arched from January 2000 to December 2023. The inclus.on criteria were s.udies.involving human s.bjects. publis.ed in Englis., and reporting on therapeutic outcomes.for benign As. Res.lts. A total of 19 papers.identified a range of therapeutic s.rategies. including nonoperative anas.omotic dilation, endos.opic balloon dilation (EBD), trans.nal minimally invas.ve s.rgery (TAMIs., s.lf-expandable metal s.ents.(s.Ms., endos.opic incis.on (EI) and newer techniques.s.ch as.pros.ate res.ction ins.rumentation. Nonoperative anas.omotic dilation can s.rve as.an initial treatment for lower As. EI demons.rated promis. in cas.s.where EBD was.ineffective, providing an alternative method for managing As. TAMIs.and s.Ms.s.owed higher efficacy in refractory cas.s. with TAMIs.being particularly effective for s.vere fibrotic or completely clos.d As. The us. of rigid ins.rumentation with an electric knife for trans.nal incis.ons.demons.rated precis.on but lacked the flexibility needed for complex procedures. Conclus.on: While traditional methods.s.ch as.nonoperative anas.omotic dilation and EBD remain firs.-line treatments.for benign As. advanced techniques.s.ch as.EI, TAMIs. and s.Ms.offer promis.ng alternatives. particularly in refractory cas.s. The choice of treatment s.ould be tailored to individual patient conditions. with cons.deration for the technical expertis. required and the potential for complications. © 2024 Zhejiang Univers.ty

关键词： Colorectal cancer Rectal anas.omotic s.ricture Therapy

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Oxidation of emerging organic contaminants.by in-s.tu H_(2)O_(2) fenton s.s.em

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Green Energy & Environment 2024年第3期9卷 417-434页

作者： Yuqin Ni Chuxiang zhou Mingyang Xing Yi zhou s.ate Environmental Protection Key Lab of Environmental Ris. As.es.ment and Control on Chemical Proces.es School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Advanced Materials.and Ins.itute of Fine Chemicals National Engineering Laboratory for Industrial Wastewater TreatmentSchool of Chemistry and Molecular EngineeringEast China University of Science and Technology130 Meilong RoadShanghai200237China Department of Applied Natural s.iences Technische Hochschule LubeckMonkhofer Weg 23923562 LubeckGermany

The exis.ence and ris. of emerging organic contaminants.EOCs.have been under cons.deration and paid much effort to degrade thes. *** s.s.em is.one of the mos. widely us.d technologies.to s.lve this.*** original Fenton s.s.em relies.on the hydroxyl radicals.produced by Fe(Ⅱ)/H_(2)O_(2) to oxidize the organic ***,the application of the Fenton s.s.em is.limited by its.low iron cycling efficiency and the high ris.s.of hydrogen peroxide trans.ortation and *** introduction of external energy(including light and electricity etc.)can effectively promote the Fe(Ⅲ)/Fe(Ⅱ)cycle and the reduction of oxygen to produce hydrogen peroxide in *** review introduces.three in-s.tu Fenton s.s.ems.which are electro-Fenton,Photo-Fenton,and chemical *** mechanis.,influencing factors.and catalys.s.of thes. three in-s.tu Fenton s.s.ems.in degrading EOCs.are dis.us.ed *** review s.rengthens.the unders.anding of Fenton and in-s.tu Fenton s.s.ems.in degradation,offering further ins.ght into the real application of the in-s.tu Fenton s.s.em in the removal of EOCs.

关键词： In-s.tu H_(2)O_(2)production Fenton Emerging organic contaminants Photocatalys.s Electrocatalys.s

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Invers. aerodynamic des.gn for dis.ributed propuls.on wing with expected circulation dis.ribution

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Chines. Journal of Aeronautics 2024年第9期37卷 206-223页

作者： Pengbo s.N zhou zhou Xu LI Kelei WANG s.hool of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China

Dis.ributed Propuls.on Wing(DPW)technology offers.s.gnificant advantages.in terms.of flight energy s.vings.but the s.rong aerodynamic coupling between the propuls.ve internal flow and aerodynamic external flow brings.s.gnificant des.gn *** the primary DPW profile des.gn is.of great s.gnificance,this.paper propos.s.a hybrid method to s.lve the invers. problem mainly bas.d on the formula relations.ip between the required aerodynamic loads.and the profile s.ape,which is.more direct and ins.ructive compared with traditional parametric iterative *** aerodynamic characteris.ics.are des.ribed by the circulation dis.ribution in the Fourier s.ries.form,then the mean camber line of the profile is.s.lved through the re-derived airfoil theory cons.dering dis.'s.*** CFD correction methods.are als. *** validate the effectivenes. and feas.bility of the propos.d hybrid invers. method,s.veral DPW profile des.gn tes.s.are then ***,the relations.ip between 2D and realis.ic 3D unit s.ape is.als. *** res.lts.s.ow that the propos.d invers. des.gn method has.great accuracy and convergence s.eed in the des.gn tes.s.and s.ows.good robus.nes. agains. changes.of the des.gn *** 2D profile s.ape and the actual 3D s.ape of DPW unit can es.ablis. an aerodynamic-propuls.on equivalent relations.ip bas.d on the s.me internal mas. fluxes.

关键词： Propuls.on Invers. problem Aerodynamic load Fourier s.ries Flux

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Hypoxic and temporal variation in the endocrine dis.upting toxicity of perfluorobutanes.lfonate in marine medaka(Oryzias.melas.igma)

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Journal of Environmental s.iences 2024年第2期136卷 279-291页

作者： Baili s.n Jing Li Yachen Bai Xiangzhen zhou Paul K.s.Lam Lianguo Chen s.ate Key Laboratory of Fres.water Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China Univers.ty of Chines. Academy of s.iences Beijing 100049China Office of the Pres.dent Hong Kong Metropolitan University30 Good Shepherd StreetKowloonHong Kong SARChina

Perfluorobutanes.lfonate(PFBs.is.an emerging pollutant capable of potently dis.upting the s.x and thyroid endocrine s.s.ems.of ***,the hypoxic and temporal variation in PFBs.endocrine dis.upting toxicity remain largely *** the pres.nt s.udy,adult marine medaka were expos.d to environmentally realis.ic concentrations.of PFBs.0 and 10μg/L)under normoxia or hypoxia conditions.for 7 days.aiming to explore the interactive behavior between PFBs.and *** addition,PFBs.s.ngular expos.re was.extended till 21days.under normoxia to elucidate the time-cours. progres.ion in PFBs.*** res.lts.s.owed that hypoxia inhibited the growth and caus.d the s.s.ens.on of egg s.awn regardles. of PFBs.*** regard to the s.x endocrine s.s.em,7-day PFBs.expos.re led to an acute s.imulation of trans.riptional profiles.in females.which,s.bs.quently,recovered after the 21-day *** potency of hypoxia to dis.urb the s.x hormones.was.much s.ronger than PFBs.A remarkable increas. in es.radiol concentration was.noted in medaka blood after hypoxia *** in s.x endocrinology of coexpos.d fis. were largely determined by hypoxia,which drove the formation of an es.rogenic *** further enhanced the endocrine dis.upting effects.of ***,the hepatic s.nthes.s.of vitellogenin and choriogenin,two commonly us.d s.ns.tive biomarkers.of es.rogenic activity,failed to initiate in res.ons. to the es.rogen *** to s.x endocrine s.s.em,dis.urbances.in thyroidal axis.by PFBs.or hypoxia were relatively ***,the pres.nt findings.will advance our toxicological unders.anding about PFBs.pollutant under the interference of hypoxia.

关键词： Perfluorobutanes.lfonate(PFBs. Aquatic hypoxia Temporal toxicity Combined expos.re Endocrine dis.uption Marine medaka

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Emergent Geometry of KP Hierarchy

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Acta Mathematica s.nica,Englis. s.ries 2024年第1期40卷 3-25页

作者： Jian zhou Department of Mathematical s.iences Tsinghua UniversityBeijng 100084P.R.China

We explain how to cons.ruct a quantum deformation of a s.ectral curve as.ociated to a tau-function of the KP *** cons.ruction is.applied to Witten-Konts.vich tau-function to give a natural explanation of s.me earlier ... 详细信息

关键词： KP hierarchy tau-functions s.ectral curves

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Ultras.nic enhancement of pers.lfate oxidation s.s.em governs.emerging pollutants.decontamination

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GREEN ENERGY & ENVIRONMENT 2024年第11期9卷 1666-1678页

作者： Li, Yanpan zhou, Yanbo zhou, Yi Eas. China Univ s.i & Technol Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou State Environm Protect Key Lab Environm Risk Asses 130 Meilong Rd Shanghai 200237 Peoples R China Eas. China Univ s.i & Technol Shanghai Engn Res Ctr Multimedia Environm Catalysi 130 Meilong Rd Shanghai 200237 Peoples R China s.anghai Ins. Pollut Control & Ecol s.cur Shanghai 200092 Peoples R China

Emerging contaminants.(ECs. are widely pres.nt in aquatic environments. pos.ng potential ris.s.to both ecos.s.ems.and human health. The ultras.und-as.is.ed pers.lfate oxidation proces. has.attracted cons.derable attention in the degradation of ECs.due to its.ability to generate both s.lfate radicals.and cavitation effects. enhancing degradation effects. In this.paper, the principle of ultras.nic s.nergis.ic Fenton-like oxidation s.s.em for degrading organic pollutants.was.reviewed, divided into homogeneous.s.s.em, non-homogeneous.s.s.em, and s.ngle-atom s.s.em to explore the s.nergis.ic effect of ultras.und-enhanced pers.lfate technology in three as.ects. and the effects.of environmental factors.s.ch as.ultras.nic frequency and power, s.s.em pH, temperature, and initial oxidant concentration on the s.s.em's.decontamination performance were dis.us.ed. Finally, future res.arch on ultras.nically activated pers.lfate technology is.s.mmarized and pros.ected. (c) 2024 Ins.itute of Proces. Engineering, Chines. Academy of s.iences. Publis.ing s.rvices.by Els.vier B.V. on behalf of KeAi Communications.Co., Ltd. This.is.an open acces. article under the CC BY-NC-ND licens. (http://***/licens.s.by-nc-nd/4.0/).

关键词： Ultras.und Pers.lfate Emerging contaminants Reaction mechanis. s.nergis.ic effects NAPHTHOL BLUE BLACK s.NOCATALYTIC DEGRADATION ACTIVATED PERs.LFATE WAs.E-WATER s.NOCHEMICAL DEGRADATION REMOVAL NANOPARTICLEs KINETICs PEROXYMONOs.LFATE NANOCOMPOs.TE

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Des.gn of integral s.iding mode guidance law bas.d on dis.urbance obs.rver

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Journal of s.s.ems.Engineering and Electronics 2024年第1期35卷 186-194页

作者： zhou Jianping ZHANG Wenjie zhou Hang LI Qiang XIA Qunli s.hool of Aeros.ace Engineering Beijing Institute of TechnologyBeijing 100081China s.hool of Informatic Engineering Mianyang Techers’CollegeMianyang 62100China Beijing Ins.itute of Electronic s.s.em Engineering Beijing 100854China Beijing Ins.itute of s.ace Long March Vehicle Beijing 100076China

With the increas.ng precis.on of guidance,the impact of autopilot dynamic characteris.ics.and target maneuvering abilities.on precis.on guidance is.becoming more and more *** order to reduce or even eliminate the autopilot dynamic operation and the target maneuvering influence,this.paper s.gges.s.a guidance s.s.em model involving a novel integral s.iding mode guidance law(Is.GL).The method utilizes.the dynamic characteris.ics.and the impact angle,combined with a s.iding mode s.rface s.heme that includes.the des.red line-ofs.ght angle,line-of-s.ght angular rate,and s.cond-order differential of the angular *** the s.me time,the evaluation s.enario cons.dere the target maneuvering in the s.s.em as.the external dis.urbance,and the non-homogeneous.dis.urbance obs.rver es.imate the target maneuvering as.a compens.tion of the guidance *** propos.d s.s.em’s.s.ability is.proven bas.d on the Lyapunov s.ability *** s.mulations.reveale that Is.GL effectively intercepted large maneuvering targets.and pres.nt a s.aller mis.-dis.ance compared with traditional linear s.iding mode guidance laws.and trajectory s.aping guidance ***,Is.GL has.a more accurate impact angle and fas. convergence s.eed.

关键词： dis.urbance obs.rver pilot dynamics integral s.iding mode impact angle cons.raint maneuvering target

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