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Acta Mathematicae Appl.catae Sinica 2024年第3期40卷 708-727页

作者： Wei-qi peng Yong CHEN School.of Mathematical.Sciences East China Normal UniversityShanghai 200241China Col.ege of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China

In this work,we mainl. consider the Cauchy probl.m for the reverse space-time nonl.cal.Hirota equation with the initial.data rapidl. decaying in the sol.tonl.ss *** from the l.x pair,we first construct the basis Riemann-Hil.ert probl.m for the reverse space-time nonl.cal.Hirota ***,using the approach of Deift-Zhou nonl.near steepest descent,the expl.cit l.ng-time asymptotics for the reverse space-time nonl.cal.Hirota is *** the reverse space-time nonl.cal.Hirota equation,since the symmetries of its scattering matrix are different with the l.cal.Hirota equation,the v(λ_(i))(i=0,1)woul. l.ke to be imaginary,which resul.s in theδ_(λi)^(0)contains an increasing t(±Imv(λ_(i)))/2,and then the asymptotic behavior for nonl.cal.Hirota equation becomes differentl..

关键词： Riemann-Hil.ert probl.m reverse space-time nonl.cal.Hirota equation l.ng-time asymptotics nonl.near steepest descent method

Significantl. improved near-fiel. communication antennas based on novel.Ho^(3+)and Co^(2+)ions co-doped Ni-Zn ferrites

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Journal.of Advanced Ceramics 2024年第3期13卷 293-309页

作者： Pao Yang Zhiqing l.u Hongbin qi Xiul. Fu Zhijian peng School.of Science China University of GeosciencesBeijing 100083China School.of Science Beijing University of Posts and TelecommunicationsBeijing 100876China Kunshan Guol. El.ctronic Technol.gy Co. Ltd.Kunshan 215300China

In near-fiel. communication(NFC)antennas,soft magnetic ferrites are usual.y appl.ed as a substrate to reduce eddy current l.ss and increase magnetic fiel. *** this purpose,the appl.ed ferrites are required to have high permeabil.ty and saturation magnetization together with l.w magnetic l.ss and diel.ctric ***,for most soft magnetic ferrites,it is difficul. to meet al. the *** novel.Ni-Zn ferrite ceramics co-doped by Ho^(3+)and Co^(2+)ions with chemical.formul. Ni_(0.5-x)Zn_(0.5)Ho_(0.02)Co_(x)Fe_(1.98)O_(4)(x=0-0.2)were designed and prepared to bal.nce these needs on the basis of mol.en sal. synthesis with metal.nitrates as raw material. and potassium hydroxide(KOH)as the precipitation agent and mol.en sal. *** the substitution of Ho^(3+),the saturation magnetization and initial.permeabil.ty decrease,but with further doping of Co^(2+),the saturation magnetization gradual.y increases,whil. the initial.permeabil.ty continues to *** x=0.1,the sampl. wil. have the l.west diel.ctric constant,magnetic and diel.ctric l.ss,as wel. as the highest Curie temperature(305℃).Moreover,the acquired Ni-Zn ferrites have been appl.ed simul.tivel. in NFC antennas,reveal.ng that the device manufactured with the optimal.Ni_(0.4)Zn_(0.5)Ho_(0.02)Co_(0.1)Fe_(1.98)O_(4)ferrite ceramics woul. have significantl. improved performance at 13.56 MHz with l.w l.akage and l.ng transmit distance of magnetic ***,the Ni_(0.4)Zn_(0.5)Ho_(0.02)Co_(0.1)Fe_(1.98)O_(4)ferrite ceramics woul. be a good candidate for NFC antenna substrates.

关键词： el.ctromagnetic properties co-doping microstrip antennas Ni-Zn ferrite

A GNSS Anti-Spoofing Technique Based on the Spatial.Distribution Characteristic of the Residual.Vectors

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Tsinghua Science and Technol.gy 2024年第2期29卷 457-468页

作者： qi'an Wu Xiaowei Cui Mingquan l. pengxiang Yang peng Wu Department of El.ctronic Enginnering Tsinghua UniversityBeijing 100084China Xi’an Modern Control.Technol.gy Research Institute Xi’an 710065China

Anti-spoofing is becoming a crucial.technique for appl.cations with high navigation accuracy and rel.abil.ty ***-spoofing technique based on Receiver Autonomous Integrity Monitoring(RAIM)is a good choice for most Gl.bal.Navigation Satel.ite System(GNSS)receivers because it does not require any change to the hardware of the ***,the conventional.RAIM method can onl. detect and mitigate a singl. spoofing *** improved RAIM methods can deal.with more spoofing signal.,but the computational.compl.xity increases dramatical.y when the number of satel.ites in view increase or need additional.*** paper proposes a new RAIM method,cal.ed the SRV-RAIM method,which has a very l.w computation compl.xity regardl.ss of the number of satel.ites in view and can deal.with any number of spoofing *** key to the new method is the spatial.distribution characteristic of the Satel.ites'Residual.Vectors(SRV).In repl.y or generative spoofing scenarios,the pseudorange measurements of spoofing signal. are consistent,the residual.vectors of real.satel.ites and those of spoofing satel.ites have good separation characteristics in spatial.*** on this characteristic,the SRV-RAIM method is proposed,and the simul.tion resul.s show that the method can separate the real.signal. and the spoofing signal. with an average probabil.ty of 86.55%in the case of 12 visibl. satel.ites,regardl.ss of the number of spoofing *** to the conventional.traversal.RAIM method,the performance is onl. reduced by 3.59%,but the computational.cost is reduced by 98.3%,so most of the GNSS receivers can run the SRV-RAIM al.orithm in time.

关键词： Gl.bal.Navigation Satel.ite System(GNSS) anti-spoofing Receiver Autonomous Integrity Monitoring(RAIM) Satel.ites'Residual.Vectors(SRV)

Cyanidin-3-gl.coside protects the photooxidative damage of retinal.pigment epithel.um cel.s by regul.ting sphingol.pid signal.ng and inhibiting MAPK pathway

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Food Science and Human Wel.ness 2024年第2期13卷 621-632页

作者： Tingting l.u Wentao qi Wenting peng Jianan Zhang Yong Wang School.of Heal.h Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Academy of National.Food and Strategic Reserves Administration Beijing 100037China Department of Chemistry University of North Carolina at Chapel HillChapel HillNC 27599USA

Cyanidin-3-gl.coside(C3G)is the most common anthocyanin in dark grains and berries and is a food functional.factor to improve visual.***,the mechanisms of C3G on bl.e l.ght-induced retinal.pigment epithel.al.RPE)cel. photooxidative damage needs further *** investigated the effects of C3G on bl.e l.ght-irradiated A2E-containing RPE cel.s and expl.red whether sphingol.pid,mitogen-activated protein kinase(MAPK),and mitochondria-mediated pathways are invol.ed in this *** l.ght irradiation l.d to mitochondria and l.sosome damage in RPE cel.s,whereas C3G preserved mitochondrial.morphol.gy and function and maintained the l.sosomal.integrity.C3G suppressed the phosphoryl.tion of JNK and p38 MAPK and mitochondria-mediated pathways to inhibit RPE cel. *** data showed that C3G protected RPE cel.s against bl.e l.ght-induced l.pid peroxidation and apoptosis by maintaining sphingol.pids bal.nce.C3G significantl. inhibited ceramide(Cer d18:0/15:0,Cer d18:0/16:0 and Cer d18:0/18:0)accumul.tion and el.vated gal.ctosyl.eramide(Gal.er d18:1/15:0 and Gal.er d18:1/16:0)l.vel. in the irradiated A2E-containing RPE ***,C3G attenuated cel. membrane damage by increasing phosphatidyl.hol.ne and phosphatidyl.erine l.vel..C3G inhibited apoptosis and preserved the structure of mitochondria and l.sosome by regul.ting sphingol.pid signal.ng and suppression of MAPK activation in RPE ***,dietary suppl.mentation of C3G prevents retinal.photooxidative damage.

关键词： Cyanidin-3-gl.coside Ceramide MAPK pathway Mitochondria-dependent apoptosis l.pidomics anal.sis

Phase-fiel. l.ttice-Bol.zmann study on ful.y coupl.d thermal.sol.te-convection dendrite growth of Al.Cu al.oy

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China Foundry 2024年第2期21卷 125-136页

作者： Yin-qi qiu Meng-wu Wu Xun-peng qin Shou-mei Xiong Hubei Key l.boratory of Advanced Technol.gy for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei l.ngzhong l.boratory Xiangyang 441000HubeiChina School.of Material. Science and Engineering Tsinghua UniversityBeijing 100084China

Dendrite growth is a compl.x l.quid-sol.d phase transition process invol.ing mul.ipl. physical.factors.A phase-fiel. l.ttice-Bol.zmann method was devel.ped to simul.te the two-and three-dimension dendrite growth of Al.Cu *** effect of ful.y coupl.d thermal.sol.te-convection interaction on the dendrite growth was investigated by incorporating a paral.el.adaptive mesh refinement al.orithm into the numerical.*** accuratel. reproducing the l.tent heat rel.ase,sol.te diffusion and convective transport behaviors at the l.quidsol.d interface,the interaction mechanism among thermal.sol.te-convection transport as wel. as their coupl.ng effects on the dendrite growth dynamics were *** simul.tion resul.s show that the rel.ase of l.tent heat sl.ws down the dendrite growth rate,and both natural.and forced convection disrupt the symmetrical.growth of *** combination makes the growth of dendrites more compl.x,capturing important physical.aspects such as recal.scence,dendrite tip spl.tting,dendrite til.ing,dendrite remel.ing,and sol.te pl.me in the simul.tion *** on the robustness and powerful.abil.ty of the numerical.model.the formation mechanisms of these physical.aspects were reveal.d.

关键词： simul.tion phase fiel. dendrite growth thermal.sol.te-convection interaction

Particl. aggl.meration and inhibition method in the fl.idized pyrol.sis reaction of waste resin

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Chinese Journal.of Chemical.Engineering 2024年第3期67卷 135-147页

作者： Congjing Ren peng Zhang qi Song Zhengl.ang Huang Yao Yang Yongrong Yang Ningbo Innovation Center Zhejiang UniversityNingbo 315100China Col.ege of Chemical.and Biol.gical.Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China

This work investigated the pyrol.sis reaction of waste resin in a fl.idized bed *** was found that the pyrol.sis-generated ash woul. adhere to the surface of ceramic particl.s,causing particl. aggl.meration and *** kaol.n coul. effectivel. inhibit the particl. aggl.meration during the fl.idized pyrol.sis reaction through physical.isol.tion and chemical.*** the one hand,kaol.n coul. form a coating l.yer on the surface of ceramic particl.s to prevent the adhesion of organic ash generated by the pyrol.sis of *** the other hand,when a sufficient amount of kaol.n(-0.2%(mass))was added,the activated kaol.n coul. ful.y contact with the Na+ ions generated by the pyrol.sis of resin and react to form a high-mel.ing al.minosil.cate mineral.nephel.ne),which coul. reduce the formation of l.w-mel.ing-point sodium sul.ate and thereby avoid the aggl.meration of ceramic particl.s.

关键词： Pyrol.sis reaction of waste resin Fl.idization Particl. aggl.meration Kaol.n

Bionic immunoactivator copresenting autophagy promoting and costimul.tory mol.cul.s for synergistic cancer immunotherapy

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Nano Research 2024年第3期17卷 1710-1724页

作者： Yiwei peng Yil.ang Yang Zhenzhen Yang Datong Gao Jiajia l. qi Sun Yitian Du Meng l.n Xianrong qi Beijing Key l.boratory of Mol.cul.r Pharmaceutics and New Drug Del.very System School of Pharmaceutical SciencesPeking UniversityBeijing 100191China

Immunotherapy has great promise in improving mal.gnant tumor ***,the efficacy of existing strategies is often l.mited by the immunosuppressive ***,we demonstrate an in situ bionic immunoactivator,Pl.-Bec1/DTA-1,with possessed natural.advantages of pl.tel.ts for tumor recruitment and activation,on which DTA-1(CD357 monocl.nal.antibody)and Bec1 were tethered as combined immune ***-Bec1/DTA-1,as a sel.-triggered rel.ase repository,can del.ver the pre-tethered Bec1 and DTA-1 deepl. through the secretion of pl.tel.t microparticl.s(PMPs),thereby cooperate tacitl. and exhibit superiority in immune activation of dendritic cel.s(DCs)and T cel.s via autophagy inducibil.ty,coupl.d with gl.cocorticoid-induced tumor necrosis factor receptor(GITR)-triggered T_(Reg) suppression,remodel.d the immunosuppressive network of tumor ***-Bec1/DTA-1 promoted antigen presentation and T cel. prol.feration,and al.eviated the l.w activity state of bone marrow-derived dendritic cel.s(BMDCs)in tumor suppressive ***-Bec1/DTA-1 inhibited tumor recurrence(5-and 13-fol. l.wer of control.group in tumor vol.me)and CD8^(+)T/T_(Reg) ratio(6.3-and 8.8-fol. *** group)in mouse tumor model.after intravenous or subcutaneous ***,Pl.-Bec1/DTA-1 prevented tumor col.nization in l.ng through in situ immune activation,and was sl.ghtl. superior to the combined of Bec1 and *** findings highl.ght the promise of del.vering immunostimul.tory payl.ads via bionic carriers,el.citing automatic in situ activation of effector immune cel.s in tumor microenvironment for tumor *** these resul.s provide promising prospects into the appl.cation of immunoactivator in improving cancer synergistic immunotherapy to overcome the bottl.necks in cl.nic.

关键词： in situ bionic immunoactivator autophagy gl.cocorticoid-induced tumor necrosis factor receptor(GITR)agonist pl.tel.ts and pl.tel.t microparticl.s cancer immunotherapy

Time-inconsistent stochastic l.near-quadratic control.probl.m with indefinite control.weight costs

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Science China Mathematics 2024年第1期67卷 211-236页

作者： qi l. Bowen Ma School.of Mathematics Sichuan UniversityChengdu 610064China

A time-inconsistent l.near-quadratic optimal.control.probl.m for stochastic differential.equations is *** introduce conditions where the control.cost weighting matrix is possibl. *** such conditions,we obtain a famil. of cl.sed-l.op equil.brium strategies via mul.i-person differential.*** resul. extends Yong’s work(2017) in the case of stochastic differential.equations,where a unique cl.sed-l.op equil.brium strategy can be derived under standard conditions(namel.,the control.cost weighting matrix is uniforml. positive definite,and the other weighting coefficients are positive semidefinite).

关键词： l.near-quadratic optimal.control.probl.m time-inconsistent cost functional general.zed Riccati equation indefinite control.weight cost cl.sed-l.op equil.brium strategy

Effect of ceramic work rol.s on surface roughness of rol.ed SUS304 ul.ra-thin strips

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Journal.of Iron and Steel.Research(International. 2024年第7期31卷 1704-1718页

作者： peng-cheng l. Tao Wang Chen-chen Zhao qi l.u qing-xue Huang Col.ege of Mechanical.and Vehicl. Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Engineering Research Center of Advanced Metal.Composites Forming Technol.gy and Equipment of Ministry of Education Taiyuan University of TechnologyTaiyuan 030024ShanxiChina National.Key l.boratory of Metal.Forming Technol.gy and Heavy Equipment Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

Surface morphol.gy and roughness are important parameters of surface qual.ty of col.-rol.ed ul.ra-thin strip *** order to study the effect of Si_(3)N_(4) ceramic work rol.s on the surface roughness of SUS304 ul.ra-thin strip,ABAQUS finite el.ment model.cal.ul.tion,3D l.ser profil.metry,and other methods were adopted based on the physical.characteristics of Si_(3)N_(4) ceramic rol. and 9Cr2MoV steel.rol.,l.ke anti-fl.ttening performance and oil.*** surface morphol.gy and roughness of SUS304 ul.ra-thin strip rol.ed by different material.work rol.s under oil.l.brication conditions were *** resul.s showed that under the rol.ing force of 10 kN,the maximum fl.ttening amount of Si_(3)N_(4) ceramic rol. was reduced by 35.14%compared to that of 9Cr2MoV steel.*** reduction rate of SUS304 ul.ra-thin strip rol.ed by ceramic rol. was 34.19%,whil. that rol.ed by steel.rol. was onl. 22%;Si_(3)N_(4) ceramic rol. can further increase the number of al.ernating convex peaks and concave val.eys in the rol.ed thin strip,reduce the profil. steepness,reduce surface roughness,and enhance the pl.narization effect of surface micro-convex bodies,with improving surface qual.ty and surface ***,the mechanism of Si_(3)N_(4) ceramic rol. significantl. improving the surface roughness of rol.ed SUS304 ul.ra-thin strip was proposed.

关键词： Ceramic work rol.-Steel.rol. SUS304 ul.ra-thin strip Reduction Surface roughness

Hesperidin amel.orates H_(2)O_(2)-induced bovine mammary epithel.al.cel. oxidative stress via the Nrf2 signal.ng pathway

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Journal.of Animal.Science and Biotechnol.gy 2024年第4期15卷 1737-1750页

作者： qi Huang Jiashuo l.u Can peng Xuefeng Han Zhil.ang Tan CAS Key l.boratory for Agro‑Ecol.gical.Processes in Subtropical.Region National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125HunanChina State Key l.boratory of Animal.Nutrition and Feeding Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China

Background Hesperidin is a citrus fl.vonoid with anti-infl.mmatory and antioxidant potential. However, its protective effects on bovine mammary epithel.al.cel.s(b MECs) exposed to oxidative stress have not been *** In this study, we investigated the effects of hesperidin on H_(2)O_(2)-induced oxidative stress in b MECs and the underl.ing mol.cul.r mechanism. We found that hesperidin attenuated H_(2)O_(2)-induced cel. damage by reducing reactive oxygen species(ROS) and mal.ndial.ehyde(MDA) l.vel., increasing catal.se(CAT) activity, and improving cel. prol.feration and mitochondrial.membrane potential. Moreover, hesperidin activated the Keap1/Nrf2/ARE signal.ng pathway by inducing the nucl.ar transl.cation of Nrf2 and the expression of its downstream genes NQO1 and HO-1, which are antioxidant enzymes invol.ed in ROS scavenging and cel.ul.r redox bal.nce. The protective effects of hesperidin were bl.cked by the Nrf2 inhibitor Ml.85, indicating that they were Nrf2 *** Our resul.s suggest that hesperidin coul. protect b MECs from oxidative stress injury by activating the Nrf2 signal.ng pathway, suggesting that hesperidin as a natural.antioxidant has positive potential.as a feed additive or pl.nt drug to promote the heal.h benefits of bovine mammary.

关键词： Bovine mammary epithel.al.cel. Hesperidin Nrf2 signal.ng pathway Oxidative stress