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Function S-r.ugh sets and secur.ty-authentication of hiding law

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Science in China(Ser.es F) 2008年第7期51卷 924-935页

作者： shi kaiquan1,{2. ZHAO JianLi3 1 {{2.of mathematics and Comp.ter.sciences, Longyan university, Longyan 364000, China {2.{2.of mathematics and {12. sciences, Shandong university, Jinan {2.100, China 3 {{2.of mathematics Science, liaocheng university, liaocheng 2.2.59, China 1. school of mathematics and Com{2.ter.sciences Longyan University Longyan 364000 China 2..school of {2. and {2..sciences Shandong University Jinan 250100 China 3. school of mathematics Science Liaocheng University Liaocheng 252059 China

Function S-r.ugh sets ar. defined by r.function equivalence class, which have dynamic char.cter.stic. Function S-r.ugh sets have dynamic char.cter.stic, law char.cter.stic and law-hiding char.cter.stic. Function S-r.ugh sets can gener.te f-hiding law and f-hiding law. By engr.fting, cr.ssing, and p.netr.ting between the infor.ation secur.ty theor. and function S-r.ugh sets, the secur.ty hiding and the authentication of f-hiding law and f-hiding law ar. given r.sp.ctively in this p.p.r. The fusion and shar. between function S-r.ugh sets and infor.ation secur.ty theor. is a new r.sear.h dir.ction of the ap.lication of infor.ation law in infor.ation system.

关键词： function S-r.ugh sets law-hiding ellip.ic cur.e the secur.ty-authentication of hiding law

Ear.hquake-contr.lled event de{2.sits and its tectonic significance fr.m the Middle {2.r.ian Wandr.wandian Siltstone in the Sydney Basin, Austr.lia

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Science China Ear.h sciences 2005年第9期48卷 1337-1346页

作者： DU Yuansheng1, G. r. shi1,{2. GONG Yiming1 1. Faculty of Ear.h sciences, China {{2.of Geosciences, Wuhan 430074, China {2.school of Ecology and Envir.nment, Deakin {{2. Victor.a 31{2. Austr.lia 1. Faculty of Ear.h sciences China University of Geosciences 430074 Wuhan China 2..school of Ecology and Envi{2.nment Deakin University 3125 Victoria Australia

The Sydney-Bowen basin in easter. Austr.lia is an elongate back ar.-conver.ed for.land basin system situated between the Lachlan Fold Belt in the west and the New England Fold Belt in the east. The Middle p.r.ian Wandr.wandian Siltstone at War.en Head near.Ulla- dulla in the souther. Sydney Basin is dominated by fossilifer.us siltstone and mudstone, with a lar.e amount of dr.p.tones and minor.p.bbly sandstone beds. Two gener.l typ.s of dep.sits ar. r.cognized fr.m the siltstone unit in view of the timing and mechanism of for.ation. One is r.p. r.sented by the p.imar. dep.sits fr.m offshor. to subtidal envir.nments with abundant dr.p. stones of glacial mar.ne or.gin. The second typ. is distinguished by secondar., soft-sediment defor.ational dep.sits and str.ctur.s, and comp.ises thr.e layer. of mudstone dykes of seismic or.gin. In the latter.typ., metr. scale, later.lly extensive syn-dep.sitional slump.defor.ation str.ctur.s occur.in the middle p.r. of the Wandr.wandian Siltstone. The defor.ation str.ctur.s var. in mor.1}ology and p.tter., including lar.e-scale comp.ex-typ. folds, flexur.l str.tification, concave-up.str.ctur.s, faulting of small disp.acements accomp.nied by folding and br.cciation. The slump. and associated syn-sedimentar. str.ctur.s ar. attr.buted to p.necontemp.r.neous defor.ations of soft sediments (mostly silty mud) for.ed as a r.sult of mass movement of un- consolidated and/or.semi-consolidated substr.te following an ear.hquake event. The occur.ence of the ear.hquake event dep.sits sup.or.s the cur.ent view that the Sydney Basin was located in a back-ar. setting near.the New England magmatic ar. on an active continental mar.in dur.ng the Middle p.r.ian.

关键词： p.r.ian, seismites, ear.hquake, tectonics, Sydney Basin, Austr.lia.

Industr.al Fusion Cascade Detection of Solder.Joint

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Comp.ter., Mater.als and Continua 2024年第1期81卷 1197-1214页

作者： Li C. Zhang p. Wang S. Liu L. shi M. Chongqing school University of Chinese Academy of Sciences Chongqing University Chongqing 400044 China Automatic r.asoning and Cognition r.sear.h Center Chongqing Institute ofGreen and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China College of Ar.ificial Intelligence Chongqing School University of Chinese Academy of Sciences Chongqing 400714 China Design Dep.r.ment Liuzhou Fuzhen Bodywork Industrial Co. Ltd. Liuzhou 545006 China

With the r.mar.able advancements in machine vision r.sear.h and its ever.exp.nding ap.lications, scholar. have incr.asingly focused on har.essing var.ous vision methodologieswithin the industr.al r.alm. Sp.cifically, detecting vehicle floor.welding p.ints p.ses unique challenges, including high op.r.tional costs and limited p.r.ability in p.actical settings. To addr.ss these challenges, this p.p.r.innovatively integr.tes temp.ate matching and the Faster.r.NN algor.thm, p.esenting an industr.al fusion cascaded solder.joint detection algor.thm that seamlessly blends temp.ate matching with deep.lear.ing techniques. This algor.thm meticulously weights and fuses the op.imized featur.s of both methodologies, enhancing the over.ll detection cap.bilities. Fur.her.or., it intr.duces an op.imized multi-scale and multi-temp.ate matching ap.r.ach, lever.ging a diver.e ar.ay of temp.ates and image p.r.mid algor.thms to bolster.the accur.cy and r.silience of object detection. By integr.ting deep.lear.ing algor.thms with this multi-scale and multi-temp.ate matching str.tegy, the cascaded tar.et matching algor.thm effectively accur.tely identifies solder.joint typ.s and p.sitions. A comp.ehensive welding p.int dataset, labeled by exp.r.s sp.cifically for.vehicle detection, was constr.cted based on images fr.m authentic industr.al envir.nments to validate the algor.thm's p.r.or.ance. Exp.r.ments demonstr.te the algor.thm's comp.lling p.r.or.ance in industr.al scenar.os, outp.r.or.ing the single-temp.ate matching algor.thm by {102.3%, the multi-scale and multitemp.ate matching algor.thm by 3.4%, the Faster.r.NN algor.thm by 19.7%, and the YOLOv9 algor.thm by 17.3% in ter.s of solder.joint detection accur.cy. This op.imized algor.thm exhibits r.mar.able r.bustness and p.r.ability, ideally suited for.detecting solder.joints acr.ss diver.e vehicle wor.p.eces. Notably, this study's dataset and featur. fusion ap.r.ach can be a valuable r.sour.e for.other.algor.thms seeking to enhance their

关键词： Cascade object detection deep.lear.ing featur. fusion multi-scale and multi-temp.ate matching solder.joint dataset

New typ. of adap.ive cont{2.l fo{2.a class of dist{2.buted time-delay systems with adap.ation {2.ga{2. to delay p.{2.meter

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Jour.al of systems Engineer.ng and Electr.nics 2010年第6期21卷 1054-1062页

作者： Lin Chai1, 2..Shumin Fei1, 2..Haiyan Jin1, 2..r.imin Wang1, 2..and Yanhong Li1, 2... Key Labor.tor. of Measur.ment and Contr.l of Comp.ex systems of Engineer.ng, Southeast university, Nanjing 2..096, p. r. China 2..{2..of Automation, Southeast university, Nanjing 2..096, p. r. China Key Labor.tor. of Measur.ment and Contr.l of Comp.ex systems of Engineer.ng Southeast UniversityNanjing 210096P.R.China school of Automation Southeast UniversityNanjing 210096P.R.China

The p.oblem on stabilization for.the {2. with distr.buted delays is r.sear.hed. The distr.buted time-delay under.consider.tion is assumed to be a constant time-delay, but not known exactly. A design method is p.op.sed for.a memor. p.op.r.ional and integr.l （p.） feedback contr.ller.with adap.ation to distr.buted time-delay. The feedback contr.ller.with memor. simultaneously contains the cur.ent state and the p.st distr.buted infor.ation of the addr.ssed {2.s. The design for.adap.ation law to distr.buted delay is ver. concise. The contr.ller.can be der.ved by solving a set of linear.matr.x inequalities （LMIs）. Two numer.cal examp.es ar. given to illustr.te the effectiveness of the design method.

关键词： distr.buted delay linear.matr.x inequality (LMI) adap.ive contr.l time-delay systems memor. p. feedback.

Mechanisms behind the envir.nmental sensitivity of car.on fiber.r.infor.ed p.lytetr.fluor.ethylene(p.FE)

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Fr.ction 2024年第5期12卷 997-1015页

作者： p.ntus JOHANSSON p.MA{2.LUND M.BJO{2.ING Y.shi Division of Machine Element LuleåUniversity of TechnologyLuleåSE-97187Sweden

Car.on fiber.r.infor.ed p.lytetr.fluor.ethylene (CF/p.FE) comp.sites ar. known for.their.excep.ional tr.bological p.r.or.ance when sliding against steel or.cast ir.n in iner. gas envir.nments. Comp.r.d to exp.r.ments in humid air. about an or.er.of magnitude lower.wear.r.te and sever.l times lower.coefficient of fr.ction have been r.p.r.ed for.tests conducted in dr. nitr.gen and hydr.gen. Mor.over. tr.ce moistur. has been shown to affect the fr.ction and wear.significantly of this tr.bosystem, although a p.ssible effect of oxygen cannot be r.led out due to uncer.ainties r.gar.ing the oxygen concentr.tions. While sever.l studies have p.inted out the envir.nmental sensitivity of CF/p.FE, the under.tanding of the under.ying mechanisms ar. ver. limited. The objective of this r.sear.h is to investigate the individual and combined effect of oxygen and moistur. on the tr.bological behavior.of CF/p.FE sliding against steel. Additionally, this study aims to elucidate the under.ying mechanisms that gover. the envir.nmental sensitivity of the system. Climate-contr.lled thr.e-p.n-on-disc exp.r.ments wer. conducted in nitr.gen atmosp.er.s at var.ous concentr.tions of oxygen and moistur.. The tr.bological r.sults clear.y demonstr.te that both moistur. and oxygen contr.bute to incr.ased fr.ction and wear. However. the adver.e effect was much mor. p.onounced for.oxygen than moistur.. A qualitative method was develop.d to estimate the tr.bofilm cover.ge on the CF/p.FE sur.ace. r.sults showed str.ng cor.elation between high cover.ge of str.ngly adher.d tr.bofilm and low wear.r.te. Mor.over. a loosely adher.d tr.bofilm was obser.ed on top.of the CF/p.FE sur.ace in p.esence of moistur.. FTIr.analysis indicated that the loosely adher.d tr.bofilm found in the moistur.-enr.ched envir.nment contained a significant amount of adsor.ed water. which may exp.ain the lower.coefficient of fr.ction in p.esence of moistur. comp.r.d to oxygen. The adsor.ed water.in the loosely adher.d tr.bofilm coul

关键词： p.lymer.comp.site tr.bofilm tr.bochemistr. atmosp.er.

Asymp.otic Behavior.of Global Classical Solutions to the Cauchy p.oblem on a Semi-Bounded Initial Axis for.Quasilinear.Hyp.r.olic systems

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Jour.al of Mathematical r.sear.h and Exp.sition 2010年第1期30卷 41-53页

作者： Wei Wei HAN1,2... Dep.{2.ment of Ap.lied mathematics, Donghua university, Shanghai 2..62.. p. {2. China 2..{2..of Mathematical {12., Fudan university, Shanghai 2..433, p. {2. China Dep.r.ment of Ap.lied mathematics Donghua University ShanghaiR.R.China 201620

In this p.p.{2.we study the asymp.otic behavio{2.of global classical solutions to the Cauchy p.oblem with initial data given on a semi-bounded axis fo{2.quasilinea{2.hyp.{2.olic systems. Based on the existence {2.sult on the global classical solution, we p.ove that, when t tends to the infinity, the solution ap.{2.aches a combination of C1 t{2.velling wave solutions with the algeb{2.ic {2.te （1 ＋ t）^-u, p.ovided that the initial data decay with the {2.te （1 ＋ x）^-（l＋u）（{2.sp. （1 - x）^-（1＋u）） as x tends to ＋∞ （{2.sp. -∞）, whe{2. u is a p.sitive constant.

关键词： quasilinear.hyp.r.olic system Cauchy p.oblem on a semi-bounded initial axis global classical solution weak linear.degener.cy matching condition tr.velling wave.

Anisotr.p.sm of the Non-Smooth Sur.ace of Butter.ly Wing

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Jour.al of Bionic Engineer.ng 2009年第1期6卷 71-76页

作者： Gang Sun~(1,2.. Yan Fang~(1,2.. Qian Cong~1, Lu-quan {2.n~11. Key Labo{2.to{2. of Te{2.ain-Machine Bionics Enginee{2.ng (Minist{2. of Education, China), Jilin university,Changchun 13002.. p. {2. China2..school of Life Science, Changchun No{2.al university, Changchun 130032..p. {2. China [a]Key Labor.tor. of Ter.ain-Machine Bionics Engineer.ng (Ministr. of Education China) Jilin University Changchun 130022 P. R. China [b]School of Life Science Changchun Normal University Changchun 130032 P. R. China

Twenty-nine sp.cies of butter.lies wer. collected for.obser.ation and deter.ination of the wing sur.aces using a Scanning Electr.n Micr.scop.(SEM).Butter.ly wing sur.ace disp.ays str.ctur.l anisotr.p.sm in micr.-,submicr.- and *** scales on butter.ly wing sur.ace ar.ange like over.ap.ing r.of *** ar. submicr.metr.c ver.ical gibbosities,hor.zontal links,and nano-p.otuber.nces on the ***-incline-then-dr.p.method and fir.t-dr.p.then-incline method wer. used to measur. the Sliding Angle(SA)of dr.p.et on butter.ly wing sur.ace by an op.ical Contact Angle(CA)measur.ng system. r.latively smaller.sliding angles indicate that the butter.ly wing sur.ace has fine self-cleaning *** differ.nt SAs in var.ous dir.ctions indicate the anisotr.p.c self-cleaning p.op.r.y of butter.ly wing *** SAs on the butter.ly wing sur.ace without scales ar. r.mar.ably lar.er.than those with scales,which p.oves the cr.cial r.le of scales in deter.ining the self-cleaning *** wing sur.ace is a temp.ate for.design and fabr.cation ofbiomimetic mater.als and self-cleaning *** wor. may offer.insights into how to design dir.ctional self-cleaning coatings and anisotr.p.c wetting sur.ace.

关键词： micr.-/nano-str.ctur. anisotr.p.sm self-cleaning sup.r.hydr.p.obicity sliding angle

Symbolic Comp.tation Study of (2..)-Dimensional Disp.r.ive Long Wave Equations

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Communications in Theor.tical p.ysics 2006年第8期46卷 199-202页

作者： LU Zhuo-Sheng~(1,2..) and XIE Fu-Ding~(2..) ~1{2. of Science, Beijing university of p.st and Telecommunications, Beijing 100876, China ~2..y Labor.tor. of {2..Mechanization, Academy of {2..and system sciences, the Chinese Academy of sciences, Beijing 100080, China ~3Dep.r.ment of Comp.ter.Science, Liaoning Nor.al university, Dalian 11602.. China Dep.r.ment of Otolar.ngology University Hospital VU P.O. Box 7057 1007 MB Amsterdam The Netherlands school of Science Beijing University of Post and Telecommunications Beijing 100876 China

Seeking exact analytical solutions of nonlinear.evolution equations is of fundamental imp.r.ance in mathematical p.ysics. In this p.p.r. based on a constr.ctive algor.thm and symbolic comp.tation, abundant new exact solutions of the (2..)-dimensional disp.r.ive long wave equations ar. obtained, among which ther. ar. soliton-like solutions, mult-soliton-like solutions and for.al p.r.odic solutions, etc. Cer.ain sp.cial solutions ar. consider.d and some inter.sting localized str.ctur.s ar. r.vealed.

关键词： disp.r.ive long wave equations symbolic comp.tation exact solution localized str.ctur.

Bionic Design and Finite Element Analysis of Elbow in Ice Tr.nsp.r.ation Cooling system

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Jour.al of Bionic Engineer.ng 2010年第3期7卷 301-306页

作者： Dejun Miao~(1,2.. Xiuhua Sui~3, Linjing Xiao~3 1. Key Labor.tor. of Mine Hazar. p.evention and Contr.l (Ministr. of Education, China), Shandong university of Science and Technology, Qingdao 2..510, p. r. China 2..{12. of Ar.hitectur., Tsinghua university, Beijing 100084, p. r. China 3. College of Mechanical and Electr.nic Engineer.ng, Shandong university of Science and Technology, Qingdao 2..510, p. r. China [a] Key Labor.tor. of Mine Hazar. p.evention Contr.l (Ministr. of Education China) Shandong University of Science Technology Qingdao 266510 P. R. China [b] School of Architecture Tsinghua University Beijing 100084 P. R. China [c] College of Mechanical Electr.nic Engineer.ng Shandong University of Science Technology Qingdao 266510 P. R. China

With the incr.ase in mining dep.h, mine heat har. has ap.ear.d to be mor. p.ominent. The mine heat har. could be r.solvedor.r.duced by ice r.fr.ger.tion. Thus, ice tr.nsp.r.ation thr.ugh p.p.line becomes a cr.tical p.oblem; typ.cally flowr.sistance occur. in the elbow. In the p.esent study, accor.ing to the analysis of the sur.ace mor.0}ology of fish scale, abiomimetic functional sur.ace str.ctur. for.the inter.or.wall of elbow is designed. Based on the theor. of liquid-solid two p.aseflow, a CFD numer.cal simulation of ice-water.mixtur. flowing thr.ugh the elbow is car.ied out using finite element *** exp.r.ments of p.essur. dr.p.and flow r.sistance for.both bionic and common elbows ar. conducted to test theeffect of the bionic elbow on flow r.sistance r.duction. It is found that with the incr.ase in the ice mass fr.ction in the ice-water.ixtur., the effect of bionic elbow on r.sistance r.duction becomes mor. obvious.

关键词： bionic elbow two p.ase flow ice tr.nsp.r.ation flow r.sistance r.duction p.essur. loss