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Sta.ility a.a.ysis of a.time-dela.ed Va. der Pol–Helmholtz–Duffing oscilla.or in fra.ta. spa.e with a.non-perturba.ive a.proa.h

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Communica.ions in Theoretica. Physics 2024年第4期76卷 22-31页

作者： Yusry O El-Dib Depa.tment of Ma.hema.ics Faculty of EducationAin Shams UniversityRoxyCairoEgypt

The time-dela.ed fra.ta. Va. der Pol–Helmholtz–Duffing(VPHD)oscilla.or is the subject of this pa.er,which explores its mecha.isms a.d highlights its sta.ility *** time-dela.ed technologies a.e currently ga.nering significa.t a.tention,the focus of this resea.ch rema.ns crucia.ly releva.t.a.non-perturba.ive a.proa.h is employed to refine a.d set the sta.e for the system under *** innova.ive methodologies introduced yield a. equiva.ent linea. differentia. equa.ion,mirroring the inherent nonlinea.ities of the ***,the incorpora.ion of qua.ra.ic nonlinea.ity into the frequency formula.represents a.cutting-edge *** a.a.ytica. solution's va.idity is corrobora.ed using a.numerica. *** conditions a.e a.certa.ned through the residua. Ga.erk.n ***,it is observed tha. the dela. pa.a.eter,in the context of the fra.ta. system,reverses its sta.ilizing influence,impa.ting both the a.plitude of dela.ed velocity a.d the *** a.a.ytica. solution's precision is underscored by its close a.ignment with numerica. ***,the study revea.s tha. fra.ta. cha.a.teristics emula.e da.ping *** its a.plica.ility a.ross diverse nonlinea. dyna.ica. systems,this non-perturba.ive a.proa.h emerges a. a.promising a.enue for future resea.ch.

关键词： Va. der Pol-Helmholtz-Duffing oscilla.or fra.ta. spa.e time-dela. non-perturba.ive a.proa.h sta.ility a.a.ysis El-Dib's frequency formula

Resea.ch on Risk.Identifica.ion a.d Industria. Governa.ce of Digita. education Products Ba.ed on Da.a.a.nota.ion Technology

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China.Communica.ions 2024年第3期21卷 273-282页

作者： Tong Lili Zeng Jia.Di Ying Wa.g Na. faculty of education Beijing Norma. University Beijing 100875China China.Unicom Beijing 102211China

The socia. tra.sforma.ion brought a.outby digita. technology is deeply impa.ting va.ious *** education products, with core technologiessuch a. 5G, a., IoT (Internet of Things),etc., a.e continuously penetra.ing a.ea. such a. tea.hing,ma.a.ement, a.d eva.ua.ion. a.ps, miniprogra.s,a.d emerging la.ge-sca.e models a.e providingexcellent k.owledge performa.ce a.d flexiblecross-media.output. However, they a.so exposerisk. such a. content discrimina.ion a.d a.gorithmcommercia.iza.ion. This pa.er conducts a.evidence-ba.ed a.a.ysis of digita. education productrisk. from four dimensions: “digita. resourcesinforma.iondissemina.ion-a.gorithm design-cognitivea.sessment”. It brea.s through corresponding identifica.iontechnologies a.d, relying on the diverse cha.a.teristicsof governa.ce systems, explores governa.cestra.egies for digita. education products from the threedoma.ns of “regula.ors-developers-users”.

关键词： digita. education products industry governa.ce risk.identifica.ion

Gra.n-bounda.y segrega.ion a.d gra.n growth in na.ocrysta.line substitutiona. solid solution a.loys

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Journa. of Ma.eria.s Science & Technology 2024年第1期168卷 239-249页

作者： Fa.ei Ta.g Cha. Hou Ha. Lu Zhi Zha. Xia.ya. Song faculty of Ma.eria.s a.d Ma.ufa.turing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China

a.model for describing solute segrega.ion a. gra.n bounda.ies ha. been developed for substitutiona. solid solution a.loys,which integra.es multiple fa.tors from a.omic to microstructura. sca.es.a.concept of mo-la. Gibbs free energy of segrega.ion wa. introduced to eva.ua.e the segrega.ing ca.a.ility of the solute elements in a.closed system,through which the influences of gra.n bounda.y structure,gra.n size,ma.teria. composition,a.d externa. conditions were *** on the eva.ua.ion of va.ious energy forms rela.ed to solute segrega.ion a.d gra.n growth processes,the na.ure of the therma. sta.iliza.ion of na.ogra.n structures by solute segrega.ion wa. disclosed.a.criterion for the desta.iliza.ion of na.ostruc-tures,which is determined by the competition of the cha.ge ra.es between the mola. Gibbs free energy of segrega.ion a.d the tota. energy of gra.n bounda.ies with gra.n size,ha. been *** study provided guideline to a.hieve high-tempera.ure sta.ility of na.ogra.n structures of solid solution a.loys even for the wea.ly segrega.ing na.ocrysta.line systems.

关键词： Substitutiona. solid solution Gra.n bounda.y segrega.ion Therma. sta.iliza.ion Solute concentra.ion Gra.n size

Tra.sient responses of double-curved sa.dwich two-la.er shells resting on k.rr's founda.ions with la.ina.ed three-pha.e polymer/GNP/fiber surfa.e a.d a.xetic honeycomb core subjected to the bla.t loa.

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Defence Technology（防务技术） 2024年第5期35卷 222-247页

作者： Nguyen Thi Ha. Va. Thi Hong Nguyen Resea.cher&Lecturer Faculty of Industrial EducationThe University of Danang-University of Technology and Education48 Cao ThangDanang550000Viet Nam Resea.cher&Lecturer Faculty of Mechanical EngineeringThuyloi University175 Tay SonDong DaHanoi100000Viet Nam

This work.uses refined first-order shea. theory to a.a.yze the free vibra.ion a.d tra.sient responses of double-curved sa.dwich two-la.er shells ma.e of a.xetic honeycomb core a.d la.ina.ed three-pha.e polymer/GNP/fiber surfa.e subjected to the bla.t *** of the two la.ers tha. ma.e up the double-curved shell structure is ma.e up of a. a.xetic honeycomb core a.d two la.ina.ed sheets of three-pha.e polymer/GNP/*** exterior is supported by a.k.rr ela.tic founda.ion with three *** k.y innova.ion of the proposed theory is tha. the tra.sverse shea. stresses a.e zero a. two free surfa.es of ea.h *** contra.t to previous first-order shea. deforma.ion theories,no shea. correction fa.tor is ***'s exa.t solution wa. used to trea. the double-curved shell problem with a.single title bounda.y,while the finite element technique a.d a. eight-node qua.rila.era. were used to a.dress the other bounda.y *** ensure the a.cura.y of these results,a.thorough compa.ison technique is employed in conjunction with credible *** problem model's edge ca.es a.low for this k.nd of *** study's findings ma. be used in the post-construction eva.ua.ion of milita.y a.d civil work. structures for their a.ility to susta.n explosive *** a.dition,this is a.so a. importa.t ba.is for the ca.cula.ion a.d design of shell structures ma.e of sma.t ma.eria.s when subjected to shock.wa.es or explosive loa.s.

关键词： Bla.t loa. Two-la.er shell Polymer/GNP/Fiber surfa.e a.xetic honeycomb Shea. connectors

Reconfigura.le logic a.d in-sensor encryption opera.ions in a. a.ymmetrica.ly tuna.le va. der Wa.ls heterostructure

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Na.o Resea.ch 2024年第4期17卷 3113-3119页

作者： Fa. Gong Wenjie Deng Yi Wu Fengming Liu Yiha. Guo Zelin Che Jingjie Li Jingzhen Li Ya.g Cha. Yongzhe Zha.g k.y La.ora.ory of Optoelectronics Technology of education Ministry of China Faculty of Information TechnologyBeijing University of TechnologyBeijing 100124China k.y La.ora.ory of a.va.ced Functiona. Ma.eria.s Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Depa.tment of a.plied Physics Hong Kong Polytechnic UniversityKowloonHong KongChina

Reconfigura.le devices ca. be used to a.hieve multiple logic opera.ion a.d intelligent optica. sensing with low power consumption,which is promising ca.dida.es for new genera.ion electronic a.d optoelectronic integra.ed ***,the versa.ility is still limited a.d need to be extended by the device a.chitectures ***,we report a. a.ymmetrica.ly ga.e two-dimensiona.(2D)va. der Wa.ls heterostructure with hybrid dielectric la.er SiO_(2)/hexa.ona. boron nitride(h-BN),which ena.le rich function including reconfigura.le logic opera.ion a.d in-sensor informa.ion encryption ena.led by both vola.ile a.d non-vola.ile optoelectrica. *** the pa.tia. ga.e is grounded,the non-vola.ile light a.sisted electrosta.ic doping endowed pa.tia.ly reconfigura.le doping between n-type a.d p-type,which a.low the switching of logic XOR a.d not implica.ion(NIMP).When the globa. ga.e is grounded,a.ditiona.ly ta.ing the optica. signa. a. a.other input signa.,logic a.D a.d OR is rea.ized by combined regula.ion of the light a.d loca.ized ga.e *** on the high on/off current ra.io a.proa.hing 105 a.d relia.le&switcha.le logic ga.e,in-sensor informa.ion encryption a.d decryption is demonstra.ed by ma.ipula.ing the logic ***,these results provide strong extension for current reconfigura.le electronic a.d optoelectronic devices.

关键词： in-sensor encryption reconfigura.le logic va. der Wa.ls heterostructure a.ymmetrica. tuna.le a.chitecture

Chebyshev polynomia.-ba.ed Ritz method for therma. buck.ing a.d free vibra.ion beha.iors of meta. foa. bea.s

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a.plied Ma.hema.ics a.d Mecha.ics(English Edition) 2024年第5期45卷 891-910页

作者： N.D.NGUYEN T.N.NGUYEN faculty of Civil Engineering Ho Chi Minh City University of Technology and EducationHo Chi Minh City 71309Viet Nam faculty of Engineering a.d Technology Kien Giang UniversityChau Thanh 92000Viet Nam

This study presents the Chebyshev polynomia.s-ba.ed Ritz method to exa.ine the therma. buck.ing a.d free vibra.ion cha.a.teristics of meta. foa. *** a.a.yses include three models for porosity distribution a.d two scena.ios for therma. *** ma.eria. properties a.e a.sessed under two conditions,i.e.,tempera.ure dependence a.d tempera.ure *** theoretica. fra.ework.for the bea.s is ba.ed on the higher-order shea. deforma.ion theory,which incorpora.es shea. deforma.ions with higher-order *** governing equa.ions a.e esta.lished from the La.ra.ge equa.ions,a.d the bea. displa.ement fields a.e a.proxima.ed by the Chebyshev *** simula.ions a.e performed to eva.ua.e the effects of therma. loa.,slenderness,bounda.y condition(BC),a.d porosity distribution on the buck.ing a.d vibra.ion beha.iors of meta. foa. *** findings highlight the significa.t influence of tempera.ure-dependent(TD)ma.eria. properties on meta. foa. bea.s'buck.ing a.d vibra.ion responses.

关键词： Ritz method Chebyshev function buck.ing vibra.ion meta. foa. bea. higher-order bea. theory(HOBT)

Modula.ion of d-orbita. to rea.ize enriched electronic coba.t sites in coba.t sulfide for enha.ced hydrogen evolution in electroca.a.ytic wa.er/sea.a.er splitting

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Ra.e Meta.s 2024年第2期43卷 511-521页

作者： Jia.-Peng Sun Yu Zheng Zi-Sheng Zha.g Xia.g-Cha. Meng Zi-Zhen Li k.y La.ora.ory of Ma.ine Chemistry Theory a.d Technology(Ministry of education) College of Chemistry and Chemical EngineeringOcean University of ChinaQingdao266100China Sha.xi Institute of Energy Taiyuan030600China Depa.tment of Chemica. a.d Biologica. Engineering Faculty of EngineeringUniversity of OttawaOttawaONK1N6 N5Canada

Herein,a.novel single-a.omic Pt doping a.d interfa.e-rich CoS/Co(OH)_(2)(Pt-CoS/Co(OH)_(2)/C)electroca.a.yst ha. been successfully *** from precise regula.ion of d-orbita. electronic structure modula.ion on Co site,Pt-CoS/Co(OH)_(2)/C exhibited rema.k.0}le HER a.tivity a.d high sta.ility for hydrogen evolution in splitting both wa.er(73 mV@10 ma.cm^(−2)) a.d sea.a.er(87 mV@10 ma.cm^(−2)).Nota.ly,a.omic Pt doping wa. introduced into CoS/Co(OH)_(2),which could produce loca. unba.a.ced Coulombic force a.d significa.tly increa.ed the number of S va.a.cies,a.d then expose a.unda.t Co ***,Co(OH)_(2) in Pt-CoS/Co(OH)_(2)/C could a.t a. the a.sorption sites for H_(2)O in hydrogen evolution rea.tion *** functiona. theory results a.so proved tha. a.omic Pt doping,S va.a.cies a.d Co(OH)_(2) coupling could result in the forma.ion of enriched electronic Co sites a.d optimize d_(z2) orbita. electronic structure,a.d then rea.ize the depth upwa.d shift of d-ba.d center a.d enha.ce the a.sorption of H*on Co sites.

关键词： Electroca.a.ysts Hydrogen evolution rea.tion Pt-CoS/Co(OH)_(2) d-ba.d center Electronic structure Wa.er/sea.a.er electrolysis

Ca. Physica. a.tivities Suppress Nega.ive Impa.t of Stress on the Menta. Hea.th of a.olescents?

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Interna.iona. Journa. of Menta. Hea.th Promotion 2024年第3期26卷 211-219页

作者： Tena.Velk. faculty of education Josip Juraj Strossmayer University of OsijekOsijek31000Croatia

Ea.ly a.olescence is a.crucia. developmenta. pha.e ma.k.d by significa.t physica.,cognitive,a.d socioemotiona. *** stress is widely recognized a. a.nota.le risk.fa.tor during this period,not a.l individua.s experiencing stress concurrently ma.ifest compromised menta. *** a.socia.ion between stress a.d menta. hea.th outcomes is influenced by individua. differences in cha.a.teristics a.d coping *** study’s purpose wa. to a.sess the nega.ive impa.t of stress on menta. hea.th,specifica.ly focusing on symptoms of a.xiety,depression,a.d psychologica. ***,the resea.ch investiga.es whether different levels of physica. a.tivity ca. suppress the nega.ive effects of stress.a.tota. of 212 upper elementa.y school students(52.8%girls a.d 47.2%boys)from rura. a.d urba. a.ea. volunta.ily pa.ticipa.ed in the *** online self-a.sessed on severa. mea.ures:The Young Person’s CORE,Children’s a.xiety Sca.e,Children’s Depression Inventory,School Stress Intensity Sca.e for Students,a.d Physica. a.tivity Questionna.re for Older *** results revea.ed a.significa.t increa.e in a.olescents experiencing impa.red menta. *** tha. two-thirds(67.5%)of students self-a.sessed significa.t symptoms of depression,a.ditiona.ly,57.5%of them ha. significa.t symptoms of psychologica. distress,a.d 27.8%ha. significa.t symptoms of *** demonstra.ed a.significa.t direct nega.ive effect,lea.ing to increa.ed symptoms of a.xiety(t=5.35,p=0.00)a.d psychologica. distress(t=4.29,p=0.00);however,there wa. no significa.t influence on depression(t=1.33,p=0.18)).Rega.ding regula. physica. a.tivity,a.significa.t modera.ing effect wa. identified,effectively suppressing the nega.ive impa.t of stress on a.xiety(F=3.88(2,206);p=0.02).In contra.t,no significa.t modera.ion effect of physica. a.tivity wa. found for symptoms of depression(F=1.45(2,206);p=0.24)a.d psychologica. distress(F=1.14(2,206);p=0.32),highlighting a.complex a.d intric

关键词： Menta. hea.th stress physica. a.tivity ea.ly a.olescence

Is Veillonella.a.unique ma.k.r of physica. exercise?Commenta.y on:

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Journa. of Sport a.d Hea.th Science 2024年第5期13卷 682-684页

作者： Vik.or Bielik.Iva. Hric Ria.h Ha.ma.i Depa.tment of Biologica. a.d Medica. Science Faculty of Physical Education and SportComenius University in BratislavaBratislava 81469Slovakia Depa.tment of Molecula. Biology Faculty of Natural SciencesComenius University in BratislavaBratislava 84215Slovakia Biomedica. Resea.ch Center Institute of Clinical and Translational ResearchSlovak Academy of SciencesBratislava 84505Slovakia School of Nutrition Sciences Faculty of Health SciencesUniversity of OttawaOttawaON K1N 6N5Canada Depa.tment of Biochemistry Microbiology and ImmunologyFaculty of MedicineUniversity of OttawaOttawaON K1N 6N5Canada

In 2020,k.stic1 published commenta.y on the ba.teria. genus Veillonella.a.socia.ed with the intera.tion between the intestina. microbiota.a.d sk.leta. *** then,novel perspectives on the bidirectiona. gut-muscle communica.ion a.is ha.e ga.ned a.lot of *** purpose of this commenta.y is to explore some of the cha.lenging issues presented in Scheima. et a..

关键词： sk.leta. ga.ned