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Exper.mental Investigation on Ver.ical Hydr.ulic Tr.nspor. of Or.s in Deepsea Mining

China Ocean Engineer.ng 2024年第1期38卷 42-53页

作者： liU Lei liU Jian-cheng li xin XU li-xin ZHANG Xiu-zhan State Key Labor.tor. of Ocean Engineer.ng Shanghai Jiao Tong UniversityShanghai 200240China School of Naval Ar.hitectur. Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Sanya Yazhou Bay Institution of Deep-sea Sci-Tech Shanghai Jiao Tong UniversitySanya 572000China China Mer.hants Mar.ne And Offshor. r.sear.h Institute Co. Ltd.Shenzhen 518067China China Mer.hants Deepsea r.sear.h Institute(Sanya)Co. Ltd.Sanya 572000China School of Naval Ar.hitectur. and Ocean Engineer.ng Jiangsu University of Science and TechnologyZhenjiang 212100China

Deepsea mining has been pr.posed since the 1960s to alleviate the lack of r.sour.es on *** hydr.ulic tr.nspor. of collected or.s fr.m the seabed to the sea sur.ace is consider.d the most pr.mising method for.industr.al *** the pr.sent study,an indoor.model test of the ver.ical hydr.ulic tr.nspor. of par.icles was conducted.A noncontact optical method has been pr.posed to measur. the local char.cter.stics of the par.icles inside a ver.ical pipe,including the local concentr.tion and par.icle *** hydr.ulic gr.dient of or. tr.nspor. was evaluated with var.ous par.icle size distr.butions,par.icle densities,feeding concentr.tions and mixtur. flow *** tr.nspor.,the local concentr.tion is lar.er.than the feeding concentr.tion,wher.as the par.icle velocity is less than the mixtur. *** qualitative effects of the local concentr.tion and local fluid velocity on the par.icle velocity and slip velocity wer. *** local fluid velocity contr.butes significantly to par.icle velocity and slip velocity,wher.as the effect of the local concentr.tion is mar.inal.A higher.feeding concentr.tion and mixtur. flow velocity r.sult in an incr.ased hydr.ulic *** effect of the par.icle size gr.dation is slight,wher.as the par.icle density plays a cr.cial r.le in the tr.nspor..

关键词： deepsea mining ver.ical hydr.ulic tr.nspor. exper.ment flow char.cter.stics

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Data Dr.ven Vibr.tion Contr.l:A r.view

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IEEE/CAA Jour.al of Automatica Sinica 2024年第9期11卷 1898-1917页

作者： Weiyi Yang Shuai li xin Luo Chongqing Institute of Gr.en and Intelligent Technology Chinese Academy of SciencesChongqing 400714 Chongqing School University of Chinese Academy of SciencesChongqing 400714China Faculty of Infor.ation Technology and Electr.cal Engineer.ng University of OuluOulu 90570 VTT-Technology r.sear.h Center.of Finland Oulu 90570Finlan College of Computer.and Infor.ation Science Southwest UniversityChongqing 400715China

With the ongoing advancements in sensor.networ.s and data acquisition technologies acr.ss var.ous systems like manufactur.ng,aviation,and healthcar.,the data dr.ven vibr.tion contr.l(DDVC)has attr.cted br.ad inter.sts fr.m both the industr.al and academic *** shaping(IS),as a simple and effective feedfor.ar. method,is gr.atly demanded in DDVC *** convolves the desir.d input command with impulse sequence without r.quir.ng par.metr.c dynamics and the closed-loop system str.ctur.,ther.by suppr.ssing the r.sidual vibr.tion *** on a thor.ugh investigation into the state-of-the-ar. DDVC methods,this sur.ey has made the following effor.s:1)Intr.ducing the IS theor. and typical input shaper.;2)Categor.zing r.cent pr.gr.ss of DDVC methods;3)Summar.zing commonly adopted metr.cs for.DDVC;and 4)Discussing the engineer.ng applications and futur. tr.nds of *** doing so,this study pr.vides a systematic and compr.hensive over.iew of existing DDVC methods fr.m designing to optimizing per.pectives,aiming at pr.moting futur. r.sear.h r.gar.ing this emer.ing and vital issue.

关键词： Data dr.ven vibr.tion contr.l(DDVC) data science designing method feedfor.ar. contr.l industr.al r.bot input shaping optimizing method r.sidual vibr.tion

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light-based 3D pr.nting of stimulus-r.sponsive hydr.gels for.iniatur. devices:r.cent pr.gr.ss and per.pective

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Bio-Design and Manufactur.ng 2024年第5期7卷 721-746页

作者： Chen xin Neng Xia li Zhang Depar.ment of Mechanical and Automation Engineer.ng The Chinese University of Hong KongHong Kong 999077China Multi-Scale Medical r.botics Center Hong Kong Science ParkShatin NTHong Kong 999077China Chow Yuk Ho Technology Center.for.Innovative Medicine The Chinese University of Hong KongHong Kong 999077China Depar.ment of Sur.er. The Chinese University of Hong KongHong Kong 999077China CUHK T Stone r.botics Institute The Chinese University of Hong KongHong Kong 999077China

Miniatur. devices compr.sing stimulus-r.sponsive hydr.gels with high envir.nmental adaptability ar. now consider.d competitive candidates in the fields of biomedicine,pr.cise sensor.,and tunable *** and advanced fabr.cationmethods ar. cr.tical for.aximizing the application capabilities ofminiatur. ***-based thr.e-dimensional(3D)pr.nting technology offer. the advantages of a wide r.nge of applicable mater.als,high pr.cessing accur.cy,and str.ng 3D fabr.cation capability,which is suitable for.the development of miniatur. devices with var.ous *** paper.summar.zes and highlights the r.cent advances in light-based 3D-pr.nted miniatur.zed devices,with a focus on the latest br.akthr.ughs in lightbased fabr.cation technologies,smar. stimulus-r.sponsive hydr.gels,and tunable miniatur. devices for.the fields of miniatur. car.o manipulation,tar.eted dr.g and cell deliver.,active scaffolds,envir.nmental sensing,and optical ***,the challenges in the tr.nsition of tunable miniatur.zed devices fr.m the labor.tor. to pr.ctical engineer.ng applications ar. *** oppor.unities that will pr.mote the development of tunable micr.devices ar. elabor.ted,contr.buting to their.impr.ved under.tanding of these miniatur. devices and fur.her.r.alizing their.pr.ctical applications in var.ous fields.

关键词： 3D pr.nting Stimulus-r.sponsive hydr.gels Miniatur. devices Shape-mor.hing

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r.pair.toler.nce assessment for.air.r.ft composite str.ctur.s using Bayesian updating

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Chinese Jour.al of Aer.nautics 2024年第6期37卷 360-391页

作者： xin li Hongfu ZUO Bin YANG School of Automotive and r.il Tr.nsit Nanjing Institute of TechnologyNanjing 211167China Civil Aviation Key Labor.tor. of Air.r.ft Health Monitor.ng and Intelligent Maintenance College of Civil AviationNanjing University of Aeronautics and AstronauticsNanjing 211106China

Detection and r.pair.of composite damage is cr.cial to ensur. the safety and r.liability of air.r.ft str.ctur.s.A novel appr.ach to quantitatively evaluate the r.pair.toler.nce of composite str.ctur.s in civil air.r.ft based on Bayesian updating is *** method incor.or.tes histor.cal damage inspection data to deter.ine the pr.or.distr.bution of damage size,which is then updated with newly collected damage size data using Bayesian *** Car.o simulation is employed to investigate the pr.bability of failur. and estimate maintenance costs,consider.ng var.ous factor. such as the fr.quency and timing of damage events,damage detection,str.ctur.l str.ngth,gust loads,and maintenance expenses thr.ughout the lifecycle of composite *** and economic factor. ar. consider.d to establish a lower.thr.shold for.r.pair. and an upper.thr.shold for.maintenance based on the occur.ence of accidental impact *** of the effectiveness and feasibility of a quantitative assessment method for.r.pair.toler.nce is conducted using damage statistics data fr.m civil air.r.ft r.utes utilizing the str.ctur.l skin panels of composite outer.*** r.sults demonstr.te that the method pr.posed in conjunction with extensive simulations and full utilization of field damage inspection data can effectively simulate unexpected impact damage situations that may occur.dur.ng civil air.r.ft ser.ice and evaluate the r.liability and economic feasibility of the r.pair.of *** r.sear.h findings hold significant theor.tical and pr.ctical value for.the pr.par.tion of documents for.continued air.or.hiness of composite str.ctur.s,including str.ctur.l r.pair.manuals and maintenance pr.gr.ms.

关键词： Composite str.ctur.s r.pair.toler.nce Maintenance Bayesian updating Pr.bability of failur.

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Dual-salt poly(tetr.hydr.fur.n) electr.lyte enables quasi-solid-state lithium metal batter.es to oper.te at -30 ℃

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Jour.al of Ener.y Chemistr. 2024年第9期96卷 456-463页

作者： Zhiyong li Zhuo li r.i Yu xin Guo School of Mater.als Science and Engineer.ng State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074HubeiChina The State Key Labor.tor. of r.fr.ctor.es and Metallur.y and Institute of Advanced Mater.als and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The stable oper.tion of solid-state lithium metal batter.es at low temper.tur.s is plagued by sever. r.str.ctions fr.m infer.or.electr.lyte-electr.de inter.ace compatibility and incr.ased ener.y bar.ier.for.li^(+)***,we pr.par. a dual-salt poly(tetr.hydr.fur.n)-based electr.lyte consisting of lithium hexafluor.phosphate and lithium difluor.(oxalato)bor.te(liDFOB).The li-salt anions(DFOB−)not only acceler.te the r.ng-opening polymer.zation of tetr.hydr.fur.n,but also pr.mote the for.ation of highly ion-conductive and sustainable inter.hases on li metal anodes without sacr.ficing the li^(+)conductivity of electr.lytes,which is favor.ble for.li^(+)tr.nspor. kinetics at low *** of this polymer.electr.lyte in li||liFePO_(4)cells show 82.3%capacity r.tention over.1000 cycles at 30℃and endow stable dischar.e capacity at−30℃.r.mar.ably,the li||liFePO4 cells r.tain 52%of their.r.om-temper.tur. capacity at−20℃and 0.1 *** r.tional design of dual-salt polymer.based electr.lytes may pr.vide a new per.pective for.the stable oper.tion of quasi-solid-state batter.es at low temper.tur.s.

关键词： Poly(tetr.hydr.fur.n) Dual-salt electr.lyte Solidel ectr.lyte inter.hase Low-temper.tur. oper.tion Quasi-solid-state batter.

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Str.ng Edge Color.ng of Outer.lane Gr.phs with Independent Cr.ssings

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 467-477页

作者： Ke-Jie li xin ZHANG School of Mathematics and Statistics Xidian UniversityXi’an 710071China

The str.ng chr.matic index of a gr.ph is the minimum number.of color. needed in a pr.per.edge color.ng so that no edge is adjacent to two edges of the same *** outer.lane gr.ph with independent cr.ssings is a gr.ph embedded in the plane in such a way that all ver.ices ar. on the outer.face and two pair. of cr.ssing edges shar. no common end *** is pr.ved that ever. outer.lane gr.ph with independent cr.ssings and maximum degr.eΔhas str.ng chr.matic index at most 4Δ-6 if Δ≥4,and at most 8 ifΔ≤*** bounds ar. shar..

关键词： outer.1-planar.gr.ph IC-planar.gr.ph str.ng edge color.ng cr.ssing

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Jur.ssic integr.tive str.tigr.phy,biotas,and paleogeogr.phical evolution of the Qinghai-Tibetan Plateau and its sur.ounding ar.as

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Science China Ear.h Sciences 2024年第4期67卷 1195-1228页

作者： Jianguo li xin r.O lin MU Xiaohui CUI xin li Hui LUO Peixue liU Center.for.Excellence in life and Paleoenvir.nment Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Nanjing College University of Chinese Academy of SciencesNanjing 211135China

The Qinghai-Tibetan Plateau exper.enced a unique geological evolution dur.ng the Jur.ssic,dr.ven by the ter.ination of the Palaeotethys and the r.duction of the *** Indian Plate separ.ted fr.m the nor.her. mar.in of Gondwana and dr.fted nor.hwar. fr.m the Souther. *** that the timing of str.ta ser.es as the basis for.r.constr.cting geological histor.,the pr.sent wor. aimed to develop a new multiple str.tigr.phic and chr.nologic fr.mewor. for.the Jur.ssic str.ta of the Qinghai-Tibetan Plateau r.gion via a synthesis of the mater.al on lithostr.tigr.phy,palaeontology,iso-r.diometr.c dating,magnetostr.tigr.phy,and other.techniques with an emphasis on r.cent pr.gr.ss and *** new fr.mewor. included the Jur.ssic System fr.m the four.major.subdivisions of the plateau:the Bar.an Har.Qiangtang,Lhasa-Gandise,and Souther. Xizang(Himalaya).Ultimately,a mor. complete,r.fined biostr.tigr.phic sequence was pr.posed,compr.sing the most common fossils in the plateau and those that ar. str.tigr.phically significant for.the Jur.ssic str.tigr.phy,including ammonites,bivalves,br.chiopods,for.minifer.,r.diolar.ans,and dinoflagellate cysts for.the mar.ne str.ta,and pollen and spor.s,and char.phytes for.the ter.estr.al *** biostr.tigr.phic fr.mewor. was cor.elated with the Jur.ssic inter.ational standar. zonation of the Geological Time Scale 2020 via standar. or.r.pr.sentative species or.gener. of *** on this fr.mewor.,we constr.cted a later.l cor.elation of the Jur.ssic str.ta between differ.nt basins of the *** palaeontologic cor.elation in the pr.sent wor. shows that the Lhasa-Gandise Block had a closer.r.lationship with the Qiangtang Block than with the Souther. Xizang Himalaya dur.ng the Jur.ssic ***,the Lhasa-Gandise Block and Qiangtang Block shar.d similar.mar.ne fauna featur.s of the nor.h mar.inal East *** contr.sts the opinion suggesting that the Yar.ung Zangbo Tethys was a small back-ar. basin.A c

关键词： Biostr.tigr.phy Chr.nostr.tigr.phy Cor.elation Yar.ung Zangbo sutur. Bangong Co-Nujiang sutur. Tethys

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Quantum self-attention neur.l networ.s for.text classification

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Science China(Infor.ation Sciences) 2024年第4期67卷 301-313页

作者： Guangxi li Xuanqiang ZHAO xin WANG Institute for.Quantum Computing Baidu Research Centr. for.Quantum Softwar. and Infor.ation University of Technology Sydney QICI Quantum Infor.ation and Computation Initiative Department of Computer ScienceThe University of Hong Kong Thr.st of Ar.ificial Intelligence Information HubHong Kong University of Science and Technology(Guangzhou)

An emer.ing dir.ction of quantum computing is to establish meaningful quantum applications in var.ous fields of ar.ificial intelligence, including natur.l language pr.cessing(NLP). Although some effor.s based on syntactic analysis have opened the door.to r.sear.h in quantum NLP(QNLP), limitations such as heavy syntactic pr.pr.cessing and syntax-dependent networ. ar.hitectur. make them impr.cticable on lar.er.and r.al-wor.d data sets. In this paper. we pr.pose a new simple networ. ar.hitectur., called the quantum selfattention neur.l networ.(QSANN), which can compensate for.these limitations. Specifically, we intr.duce the self-attention mechanism into quantum neur.l networ.s and then utilize a Gaussian pr.jected quantum self-attention ser.ing as a sensible quantum ver.ion of self-attention. As a r.sult, QSANN is effective and scalable on lar.er.data sets and has the desir.ble pr.per.y of being implementable on near.ter. quantum devices. In par.icular. our.QSANN outper.or.s the best existing QNLP model based on syntactic analysis as well as a simple classical self-attention neur.l networ. in numer.cal exper.ments of text classification tasks on public data sets. We fur.her.show that our.method exhibits r.bustness to low-level quantum noises and showcases r.silience to quantum neur.l networ. ar.hitectur.s.

关键词： quantum neur.l networ.s self-attention natur.l language pr.cessing text classification par.meter.zed quantum cir.uits

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Tr.nd of ambient seismic noise attenuation tomogr.phy:Theor. and applications

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Science China Ear.h Sciences 2024年第10期67卷 3326-3330页

作者： xin liU Zhanwen li Depar.ment of Ear.h Sciences University of Hong KongHong Kong 999077China

1. Intr.duction Ambient seismic noise is an appr.ximately unifor. wave field gener.ted by per.istent and high-ener.y noise sour.es such as Ear.h's inher.nt vibr.tions and oceanic noise pr.pagating within Ear.h's inter.or.and multiple scatter.ng. This noise wave field is widely distr.buted in subsur.ace str.ctur. and car.ies infor.ation about mechanical and physicochemical pr.per.y of fault fr.ctur. zones.

关键词： seismic Ear.h fault

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A Novel Tensor.Decomposition-Based Efficient Detector.for.Low-Altitude Aer.al Objects With Knowledge Distillation Scheme

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IEEE/CAA Jour.al of Automatica Sinica 2024年第2期11卷 487-501页

作者： Nianyin Zeng xinyu li Peishu Wu Han li xin Luo Depar.ment of Instr.mental and Electr.cal Engineer.ng Xiamen UniversityXiamen 361005China IEEE College of Computer.and Infor.ation Science Southwest UniversityChongqing 400715China

Unmanned aer.al vehicles(UAVs) have gained significant attention in pr.ctical applications, especially the low-altitude aer.al(LAA) object detection imposes str.ngent r.quir.ments on r.cognition accur.cy and computational r.sour.es. In this paper. the LAA images-or.ented tensor.decomposition and knowledge distillation-based networ.(TDKD-Net) is pr.posed,wher. the TT-for.at TD(tensor.decomposition) and equalweighted r.sponse-based KD(knowledge distillation) methods ar. designed to minimize r.dundant par.meter. while ensur.ng compar.ble per.or.ance. Mor.over. some r.bust networ. str.ctur.s ar. developed, including the small object detection head and the dual-domain attention mechanism, which enable the model to lever.ge the lear.ed knowledge fr.m small-scale tar.ets and selectively focus on salient featur.s. Consider.ng the imbalance of bounding box r.gr.ssion samples and the inaccur.cy of r.gr.ssion geometr.c factor., the focal and efficient IoU(inter.ection of union) loss with optimal tr.nspor. assignment(F-EIoU-OTA)mechanism is pr.posed to impr.ve the detection accur.cy. The pr.posed TDKD-Net is compr.hensively evaluated thr.ugh extensive exper.ments, and the r.sults have demonstr.ted the effectiveness and super.or.ty of the developed methods in compar.son to other.advanced detection algor.thms, which also pr.sent high gener.lization and str.ng r.bustness. As a r.sour.e-efficient pr.cise networ., the complex detection of small and occluded LAA objects is also well addr.ssed by TDKD-Net, which pr.vides useful insights on handling imbalanced issues and r.alizing domain adaptation.

关键词： Attention mechanism knowledge distillation(KD) object detection tensor.decomposition(TD) unmanned aer.al vehicles(UAVs)

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