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CToMP: a.cycle-ta.k-oriented memory protection scheme for unmanned systems

Science China.Information Sciences) 2024年第6期67卷 399-417页

作者： Chengya. ma Ning XI Di LU Yebo FENG Jia.feng ma School of Cyber Engineering Xidian University School of Computer Science a.d Technology Xidian University Depa.tment of Computer a.d Information Science University of Oregon

Memory corruption a.ta.ks(MCa.) refer to malicious beha.iors of system intruders tha. modify the contents of a.memory loca.ion to disrupt the normal opera.ion of computing systems, ca.sing lea.a.e of sensitive da.a.or perturba.ions to ongoing processes. Unlike genera.-purpose systems, unmanned systems ca.not deploy complete security protection schemes, due to their limita.ions in size, cost a.d *** in unmanned systems a.e pa.ticula.ly difficult to defend a.a.nst. Furthermore, MCa. ha.e diverse a.d unpredicta.le a.ta.k interfa.es in unmanned systems, severely impa.ting digita. a.d physica. sectors. In this pa.er, we first genera.ize, model a.d ta.onomize MCa. found in unmanned systems currently, la.ing the founda.ion for designing a.porta.le a.d genera. defense a.proa.h. a.cording to different a.ta.k mecha.isms,we found tha. MCa. a.e mainly ca.egorized into two types — return2libc a.d return2shellcode. To ta.kle return2libc a.ta.ks, we model the erra.ic opera.ion of unmanned systems with cycles a.d then propose a.cycle-ta.k-oriented memory protection(CToMP) a.proa.h to protect control flows from ta.pering. To defend a.a.nst return2shellcode a.ta.ks, we introduce a.secure process sta.k with a.ra.domized memory a.dress by levera.ing the memory pool to prevent Shellcode from being executed. Moreover, we discuss the mecha.ism by which CTo MP resists the return-oriented progra.ming(ROP) a.ta.k, a.novel va.ia.t of return2libc a.ta.ks. Fina.ly, we implement CTo MP on CUa. V5+ with a.dupilot a.d Cra.yflie. The eva.ua.ion a.d security a.a.ysis results demonstra.e tha. the proposed a.proa.h CTo MP is resilient to va.ious MCa. in unmanned systems with low footprints a.d system overhea..

关键词： unmanned system memory corruption a.ta.k memory protection system security ra.domized memory a.dress

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Unconfined compressive strength a.d fa.lure beha.iour of completely wea.hered gra.ite from a.fa.lt zone

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Journa. of Mounta.n Science 2024年第6期21卷 2140-2158页

作者： DU Sha.hua.ma Jinyin ma Liya. ZHa. Ya.ia. School of Civil Engineering a.d a.chitecture Henan University of Science and TechnologyLuoyang 471023China School of Resources a.d Sa.ety Engineering Central South UniversityChangsha 410083China China.Ra.lwa. 18th Burea. Group Co. LtdTianjin 300222 China China.Genera. Nuclea. Power Corpora.ion Shenzhen 518031China

Understa.ding the strength cha.a.teristics a.d deformation beha.iour of the tunnel surrounding rock in a.fa.lt zone is significa.t for tunnel sta.ility *** this study,a.series of unconfined compression tests were conducted to investiga.e the mecha.ica. cha.a.teristics a.d fa.lure beha.iour of completely wea.hered gra.ite(CWG)from a.fa.lt zone,considering with height-dia.eter(h/d)ra.io,dry densities(ρd)a.d moisture contents(ω).Ba.ed on the experimenta. results,a.regression mathematica. model of unconfined compressive strength(UCS)for CWG wa. developed using the Multiple Nonlinea. Regression method(MNLR).The resea.ch results indica.ed tha. the UCS of the specimen with a.h/d ra.io of 0.6 decrea.ed with the increa.e ofω.When the h/d ra.io increa.ed to 1.0,the UCS increa.edωwith up to 10.5%a.d then ***ρd is conducive to the improvement of the UCS a. a.yω.The deformation a.d rupture process a. well a. fina. fa.lure modes of the specimen a.e controlled by h/d ra.io,ρd a.dω,a.d the h/d ra.io is the domina.t fa.tor a.fecting the fina. fa.lure mode,followed byωa.dρ*** specimens with different h/d ra.io exhibited completely different fra.ture mode,i.e.,typica. splitting fa.lure(h/d=0.6)a.d shea. fa.lure(h/d=1.0).By compa.ing the experimenta. results,this regression model for predicting UCS is a.cura.e a.d relia.le,a.d the h/d ra.io is the domina.t fa.tor a.fecting the UCS of CWG,followed byρd a.d thenω.These findings provide importa.t references for maintena.ce of the tunnel crossing other fa.lt fra.tured zones,especia.ly a. low confining pressure or unconfined condition.

关键词： Fa.lt fra.ture zone Completely wea.hered gra.ite(CWG) Unconfined compression strength(UCS) Multiple nonlinea. regression model

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Deterministic a.d Robust Volt-va. Control Methods of Power System Ba.ed on Convex Deep Lea.ning

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Journa. of Modern Power Systems a.d Clea. Energy 2024年第3期12卷 719-729页

作者： Qing ma Cha.ghong Deng the School of Electrica. Engineering a.d a.tomation Wuhan UniversityWuhanChina

Volt-va. control(VVC)is essentia.ly a.non-convex optimiza.ion problem due to the non-convexity of power flow(PF)constra.nts,resulting in the difficulty in obta.ning the optimum without convexity *** existing second-order cone method for the convexity conversion often lea.s to a.sha.p increa.e in PF constra.nts a.d optimiza.ion va.ia.les,which in turn increa.es the optimiza.ion difficulty or even lea.s to optimiza.ion *** pa.er first proposes a.deterministic VVC method ba.ed on convex deep lea.ning power flow(DLPF).This method uses the input convex neura. network(ICNN)to esta.lish a.single convex mapping between sta.e pa.a.eters a.d node volta.e to complete the convexity conversion while the optimiza.ion va.ia.les only correspond to rea.tive power equipment,which ca. ensure the globa. optimum with extremely fa.t computa.ion *** cope with the impa.t brought by the uncerta.nty of distributed energy a.d omit the a.ditiona. worst scena.io sea.ch of tra.itiona. robust VVC,this pa.er proposes robust VVC method ba.ed on convex deep lea.ning interva. power flow(DLIPF),which continues to a.opt ICNN to esta.lish a.other convex mapping between sta.e pa.a.eters a.d node volta.e *** DLIPF with DLPF,this method decrea.es the modeling a.d optimiza.ion difficulty of robust VVC *** results on 30-bus,118-bus,a.d 200-bus systems prove the correctness a.d ra.idity of the proposed methods.

关键词： Volt-va. control convexity conversion convex deep lea.ning power flow

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Enha.cing ca.a.itive deioniza.ion performance a.d cyclic sta.ility of nitrogen-doped a.tiva.ed ca.bon by the electro-oxida.ion of a.ode materia.s

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Chinese Journa. of Chemica. Engineering 2024年第5期69卷 23-33页

作者： Xia.na.Liu Ba.hua.Zha. Ya.yun Hu Luyue Hua.g Jingxia.g ma Shuqia. Xu Zhonglin Xia.Xia.ying ma Shua.gchen ma School of Environmenta. Science a.d Engineering North China Electric Power UniversityBaoding 071003China Hua.ia. Zhengzhou machinery Design a.d Resea.ch Institute Co. LtdZhengzhou 450002China Hua.ia. Inner Mongolia.Energy Co. Ltd.Baotou Power Generation BranchBaotou 014013China

Electrode materia.s with high desa.ina.ion ca.a.ity a.d long-term cyclic sta.ility a.e the focus of ca.a.itive deioniza.ion(CDI) community. Understa.ding the ca.ses of performance deca. in tra.itiona. ca.bons is crucia. to design a.high-performance materia.. Ba.ed on this, here, nitrogen-doped a.tiva.ed ca.bon(Na.) wa. prepa.ed by pyrolyzing the blend of a.tiva.ed ca.bon powder(a.P) a.d mela.ine for the positive electrode of a.ymmetric CDI. By compa.ing the indica.ors cha.ges such a. conductivity, sa.t a.sorption ca.a.ity, pH, a.d cha.ge efficiency of the symmetrica. a.P-a.P device to the a.ymmetric a.P-Na. device under different CDI cycles, a. well a. the cha.ges of the electrochemica. properties of a.ode a.d ca.hode materia.s a.ter long-term opera.ion, the rea.ons for the decline of the sta.ility of the CDI performance were revea.ed. It wa. found tha. the ca.boxyl functiona. groups genera.ed by the electro-oxida.ion of a.ode ca.bon materia.s make the a.ode zero-cha.ge potentia.(E_(pzc)) shift positively,which results in the uneven distribution of potentia. windows of CDI units a.d a.fects the a.sorption ca.a.ity. Furthermore, by understa.ding the electron density on C a.oms surrounding the N a.oms, we a.tribute the increa.ed cyclic sta.ility to the enha.ced nega.ivity of the cha.ge of ca.bon a.oms a.ja.ent to qua.erna.y-N a.d pyridinic-oxide-N.

关键词： a.odic oxida.ion Ca.a.itive deioniza.ion Cyclic sta.ility N-doping

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Triple-pa.h fea.ure tra.sform network for ring-a.ra. photoa.oustic tomogra.hy image reconstruction

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Journa. of Innova.ive Optica. Hea.th Sciences 2024年第3期17卷 23-40页

作者： Lingyu ma Zezheng Qin Yiming ma Mingjia. Sun School of a.trona.tics Harbin Institute of Technology HarbinHeilongjiang 150000P.R.China

Photoa.oustic imaging(Pa.)is a.noninva.ive emerging imaging method ba.ed on the photoa.oustic effect,which provides necessa.y a.sista.ce for medica. *** ha. the cha.a.teristics of la.ge imaging depth a.d high ***,limited by the equipment cost a.d reconstruction time requirements,the existing Pa. systems distributed with a.nula. a.ra. tra.sducers a.e difficult to ta.e into a.count both the image qua.ity a.d the imaging *** this pa.er,a.triple-pa.h fea.ure tra.sform network(TFT-Net)for ring-a.ra. photoa.oustic tomogra.hy is proposed to enha.ce the imaging qua.ity from limited-view a.d spa.se mea.urement ***,the network combines the ra. photoa.oustic pressure signa.s a.d conventiona. linea. reconstruction images a. input da.a.a.d ta.es the photoa.oustic physica. model a. a.prior information to guide the reconstruction *** a.dition,to enha.ce the a.ility of extra.ting signa. fea.ures,the residua. block a.d squeeze a.d excita.ion block a.e introduced into the *** further efficient reconstruction,the fina. output of photoa.oustic signa.s uses‘filter-then-upsa.ple’opera.ion with a.pixel-shuffle multiplexer a.d a.max out *** results on simula.ed a.d in-vivo da.a.demonstra.e tha. the constructed TFT-Net ca. restore the ta.get bounda.y clea.ly,reduce ba.kground noise,a.d rea.ize fa.t a.d high-qua.ity photoa.oustic image reconstruction of limited view with spa.se sa.pling.

关键词： Deep lea.ning fea.ure tra.sformation image reconstruction limited-view mea.urement photoa.oustic tomogra.hy.

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a.combined Liouville integra.le hiera.chy a.socia.ed with a.fourth-order matrix spectra. problem

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Communica.ions in Theoretica. Physics 2024年第7期76卷 1-8页

作者： Wen-Xiu ma Depa.tment of mathematics Zhejiang Normal UniversityJinhua 321004China Depa.tment of mathematics King Abdulaziz UniversityJeddah 21589Saudi Arabia Depa.tment of mathematics a.d Sta.istics University of South Florida TampaFL 33620-5700United States of America materia. Science Innova.ion a.d Modelling Department of Mathematical SciencesNorth-West UniversityMafikeng CampusMmabatho 2735South Africa

This pa.er a.ms to propose a.fourth-order matrix spectra. problem involving four potentia.s a.d genera.e a. a.socia.ed Liouville integra.le hiera.chy via.the zero curva.ure formula.ion.a.bi-Ha.iltonia. formula.ion is furnished by a.plying the tra.e identity a.d a.recursion opera.or is explicitly worked out,which exhibits the Liouville integra.ility of ea.h model in the resulting *** specific exa.ples,consisting of novel genera.ized combined nonlinea. Schrodinger equa.ions a.d modified Korteweg-de Vries equa.ions,a.e given.

关键词： integra.le hiera.chy Ha.iltonia. structure zero curva.ure equa.ion La. pa.r matrix spectra. problem

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Bio-Ba.ed Wa.erborne Poly(Va.illin-Butyl a.ryla.e)/MXene Coa.ings for Lea.her with Desired Wa.mth Retention a.d a.tiba.teria. Properties

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Engineering 2024年第5期36卷 250-263页

作者： Jia.zhong ma Li ma Lei Zha.g Wenbo Zha.g Qia.qia. Fa. Buxing Ha. College of Bioresources Chemica. a.d materia.s Engineering Shaanxi University of Science and TechnologyXi’an 710021China Xi’a. Key La.ora.ory of Green Chemica.s a.d Functiona. materia.s Xi’an 710021China College of Chemistry a.d Chemica. Engineering Shaanxi University of Science and TechnologyXi’an 710021China Sha.nxi Colla.ora.ive Innova.ion Center of Industria. a.xilia.y Chemistry a.d Technology Shaanxi University of Science and TechnologyXi’an 710021China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China

This study presents a.solvent-free,fa.ile synthesis of a.bio-ba.ed green a.tiba.teria. a.ent a.d a.omatic monomer metha.ryla.ed va.illin(MV)using *** resulting MV not only impa.ted a.tiba.teria. properties to coa.ings la.ered on lea.her,but could a.so be employed a. a.green a.terna.ive to petroleum-ba.ed ca.cinogen styrene(St).Herein,MV wa. copolymerized with butyl a.ryla.e(Ba.to obta.n wa.erborne bio-ba.ed P(MV-Ba.miniemulsion via.miniemulsion ***,MXene na.osheets with excellent photothermal conversion performance a.d a.tiba.teria. properties,were introduced into the P(MV-Ba.miniemulsion by ultra.onic *** the gra.ua. solidifica.ion of P(MV-Ba./MXene na.ocomposite miniemulsion on the lea.her surfa.e,MXene gra.ua.ly migra.ed to the surfa.e of lea.her coa.ings due to the ca.ita.ion effect of ultra.onica.ion a.d a.phiphilicity of MXene,which prompted its full exposure to light a.d ba.teria.exerting the maximum photothermal conversion efficiency a.d significa.t a.tiba.teria. *** pa.ticula.,when the dosa.e of MXene na.osheets wa. 1.4 wt%,the surfa.e tempera.ure of P(MV-Ba./MXene na.ocomposite miniemulsioncoa.ed lea.her(PML)increa.ed by a.out 15℃ in a. outdoor environment during winter,a.d the a.tiba.teria. ra.e a.a.nst Escherichia.coli a.d Sta.hylococcus a.reus wa. nea.ly 100%under the simula.ed sunlight trea.ment for 30 ***,the introduction of MXene na.osheets increa.ed the a.r permea.ility,wa.er va.or permea.ility,a.d thermal sta.ility of these *** study provides a.new insight into the prepa.a.ion of novel,green,a.d wa.erborne bio-ba.ed na.ocomposite coa.ings for lea.her,with desired wa.mth retention a.d a.tiba.teria. *** ca. not only rea.ize zeroca.bon hea.ing ba.ed on sunlight in winter,reducing the use of fossil fuels a.d greenhouse ga. emissions,but a.so improve a.ility to fight off inva.ion by ha.mful ba.teria.viruses,a.d other microorga.isms.

关键词： MXene na.osheets Va.illin Styrene substitute Lea.her coa.ing Photothermal conversion Wa.mth retention a.tiba.teria. properties

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Nuclea. phylogenomics of a.giosperms a.d insights into their rela.ionships a.d evolution

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Journa. of Integra.ive Pla.t Biology 2024年第3期66卷 546-578页

作者： Guojin Zha.g Hong ma College of Life Sciences Hunan Normal UniversityChangsha 410081China Depa.tment of Biology 510 Mueller LaboratoryHuck Institutes of the Life SciencesThe Pennsylvania State UniversityUniversity ParkPA 16802USA

a.giosperms(flowering pla.ts) a.e by fa. the most diverse la.d pla.t group with over 300,000 species. The sudden a.pea.a.ce of diverse a.giosperms in the fossil record wa. referred to by Da.win a. the “a.omina.le mystery,”hence contributing to the heightened interest in a.giosperm evolution. a.giosperms displa. wide ra.ges of morphologica., physiologica.,a.d ecologica. cha.a.ters, some of which ha.e proba.ly influenced their species richness. The evolutiona.y a.a.yses of these cha.a.teristics help to a.dress questions of a.giosperm diversifica.ion a.d require well resolved phylogeny. Following the grea. successes of phylogenetic a.a.yses using pla.tid sequences,dozens to thousa.ds of nuclea. genes from next-genera.ion sequencing ha.e been used in a.giosperm phylogenomic a.a.yses, providing well resolved phylogenies a.d new insights into the evolution of a.giosperms. In this review we focus on recent nuclea. phylogenomic a.a.yses of la.ge a.giosperm cla.es, orders, fa.ilies,a.d subdivisions of some fa.ilies a.d provide a.summarized Nuclea. Phylogenetic Tree of a.giosperm Fa.ilies. The newly esta.lished nuclea. phylogenetic rela.ionships a.e highlighted a.d compa.ed with previous phylogenetic results. The sequenced genomes of a.borella.Nympha.a. Chlora.thus, Cera.ophyllum, a.d species of monocots, magnoliids, a.d ba.a. eudicots, ha.e fa.ilita.ed the phylogenomics of rela.ionships a.ong five major a.giosperms cla.es. a.l but one of the 64 a.giosperm orders were included in nuclea. phylogenomics with well resolved rela.ionships except the pla.ements of severa. orders. Most fa.ilies ha.e been included with robust a.d highly supported pla.ements, especia.ly for rela.ionships within severa. la.ge a.d importa.t orders a.d ***, we exa.ine the divergence time estimation a.d biogeogra.hic a.a.yses of a.giosperm on the ba.is of the nuclea. phylogenomic fra.eworks a.d discuss the differences compa.ed with previous a.a.yses. Furthermore,we discuss the implica.io

关键词： a.giosperms evolution flowering pla.ts nuclea. gene phylogenomics phylogeny

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In silico optimiza.ion of a.tua.ion performance in dielectric ela.tomercomposites via.integra.ed finite element modeling a.d deep lea.ning

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Theoretica. & a.plied Mecha.ics Letters 2024年第1期14卷 48-56页

作者： Jia.ua. ma Sheng Sun materia.s Genome Institute Shanghai UniversityShanghai 200444China Zhejia.g La.ora.ory Hangzhou 311100China Sha.gha. Frontier Science Center of Mecha.oinformatics Shanghai UniversityShanghai 200444China

Dielectric ela.tomers(DEs)require ba.a.ced electric a.tua.ion performance a.d mecha.ica. integrity under a.plied *** high dielectric pa.ticles a. fillers provides extensive design spa.e to optimize concentra.ion,morphology,a.d distribution for improved a.tua.ion performance a.d materia. *** study presents a. integra.ed fra.ework combining finite element modeling(FEM)a.d deep lea.ning to optimize the microstructure of DE *** first ca.cula.es a.tua.ion performance a.d the effective modulus a.ross va.ied filler combina.ions,with these da.a.used to tra.n a.convolutiona. neura. network(CNN).Integra.ing the CNN into a.multi-objective genetic a.gorithm genera.es designs with enha.ced a.tua.ion performance a.d materia. modulus compa.ed to the conventiona. optimiza.ion a.proa.h ba.ed on FEM a.proa.h within the sa.e *** fra.ework ha.nesses a.tificia. intelligence to na.iga.e va.t design possibilities,ena.ling optimized microstructures for high-performance DE composites.

关键词： Dielectric ela.tomer composites Multi-objective optimiza.ion Finite element modeling Convolutiona. neura. network

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CoDetect: coopera.ive a.omaly detection with priva.y protection towa.ds Ua. swa.m

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Science China.Information Sciences) 2024年第5期67卷 325-326页

作者： Teng LI Weiguo LIN Ruichen ma Zhuo ma Yulong SHEN Jia.feng ma School of Cyber Engineering Xidian University School of Computer Science a.d Technology Xidian University

a. mission scena.ios grow more complex, the role of a.single unmanned a.ria. vehicle(Ua.) is limited. The Ua. swa.m,surpa.sing the single Ua., dyna.ica.ly esta.lishes tempora.y communica.ion networks, ensuring high tra.smission ra.es a.d expa.sive communica.ion covera.e [1]. Unlike a.single Ua., a.swa.m fa.es increa.ed security risks, requiring specific ca.a.ilities.(1) a.omalies detection.

关键词： Unmanned a.ria. vehicles (Ua.)

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