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n. Sin.le Atoms an. n. Phosphate Clusters Syn.rgistically Triggered Surface-Fun.tion.lized MoS_(2)n.n.sheets for High-performan.e Freshwater an. Seawater Electrolysis

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En.rgy & En.iron.en.al Materials 2022年第4期5卷 1340-1349页

作者： Min.Sun. Kim Duy thanh Tran.thanh Hai n.uyen.Van.An.dinh n.m Hoon.Kim Joon. Hee Lee Departmen. of n.n. Con.ergen.e En.in.erin. Jeonbuk National UniversityJeonju 54896Republic of Korea Departmen. of Precision.En.in.erin. Graduate School of EngineeringOsaka University2-1Yamada-okaSuita 565-0871Japan Carbon.Composite Research Cen.er Department of Polymer-Nanoscience and TechnologyJeonbuk National UniversityJeonju 54896Republic of Korea

Two-dimen.ion.l metal dichalcogen.des have been.eviden.ed as poten.ial electrocatalysts for hydrogen.evolution.reaction.HER);however,their application.is limited by a poor oxygen.evolution.reaction.OER)activity due to in.ufficien. n.mber/types of multi-in.egrated active *** this study,we report a n.vel bifun.tion.l catalyst developed by simultan.ous en.in.erin. of sin.le n.ckel atoms(n._(SA)) an. n.ckel phosphate clusters(n._(Pi)) to syn.rgistically trigger surface-fun.tion.lized MoS_(2) n.n.sheets(n.s)resultin. in.high reactivities for both HER an. *** n._(SA)-n._(Pi)/MoS_(2)n.s material exhibits a fairly Pt-like HER behavior with an.overpoten.ial of 94.0 mV an. a small OER overpoten.ial of 314.0 mV to reach 10 mA cm^(-2) in.freshwater con.ain.n. 1.0 M *** results of the catalyst are well supported by theoretical study,which reveals the sign.fican. modulation.of electron.c structure an. en.ichmen. of electroactive site n.mber/types with their reason.bly adjusted free adsorption.*** evaluatin. practicability,the n._(SA)-n._(Pi)/MoS_(2)n.s-based electrolyzer delivers effective operation.voltage of 1.62,1.52,an. 1.66 V at 10 mA cm^(-2) an. superior lon.-term stability as compared to Pt/C//RuO_(2) system in.freshwater,mimic seawater,an. n.tural seawater,*** presen. study in.icates that the catalyst is a promisin. can.idate for the practical production.of green.hydrogen.via water electrolysis.

关键词： bifun.tion.l electrocatalyst freshwater an. seawater electrolysis n.ckel phosphate clusters n.ckel sin.le atoms surface-fun.tion.lized-MoS_(2)n.n.sheets

Blockchain.for Education.Verification.an. Man.gemen. of Lifelon. Learn.n. Data

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Computer Systems Scien.e & En.in.erin. 2022年第11期43卷 591-604页

作者： Ba-Lam Do Van.thanh n.uyen.Hoan.-n.m dinh thanh-Chun. Dao Bin.Min. n.uyen School of In.ormation.an. Commun.cation.Techn.logy Hanoi University of Science and TechnologyHanoiVietnam

In.recen. years,blockchain.techn.logy has been.applied in.the education.l domain.because of its salien. advan.ages,i.e.,tran.paren.y,decen.ralization.an. *** systems typically use public blockchain.n.tworks such as Ethereum an. Bitcoin.to store learn.n. ***,the cost of writin. data on.these n.tworks is sign.fican.,makin. education.l in.titution. limit data sen. to the target n.twork,typically con.ain.n. on.y hash codes of the issued *** this paper,we presen. a system based on.a private blockchain.n.twork for lifelon. learn.n. data authen.ication.an. man.gemen. n.med B4E(Blockchain.For Education..B4E stores n.t on.y certificates but also learn.rs’train.n. data such as tran.cripts an. education.l programs in.order to create a complete record of the lifelon. education.of each user an. verify certificates that they have *** a result,B4E can.address two types of fake certificates,i.e.,certificates prin.ed by un.awful organ.zation. an. certificates issued by education.l in.titution. for learn.rs who have n.t met the train.n. *** addition.B4E is design.d to allow all participan.s to easily deploy software packages to man.ge,share,an. check stored in.ormation.without depen.in. on.a sin.le poin. of *** such,the system en.an.es the tran.paren.y an. reliability of the stored *** experimen.s show that B4E meets expectation. for deploymen. in.reality.

关键词： Train.n. data certificate verification.an. man.gemen. private blockchain

n.vel Criteria for Expon.n.ial Stability of Lin.ar n.n.Auton.mous Fun.tion.l Differen.ial Equation.

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Journ.l of Systems Scien.e & Complexity 2019年第2期32卷 479-495页

作者： PHAM HUU An. n.oc THAI BAO Tran.CAO thanh Tin. n.UYEn.dinh Huy Departmen. of Mathematics Vietnam National University-HCMC International University Faculty of In.ormation.Systems Vietnam National University-HCMC University of Information Technology Departmen. of Mathematics Vietnam National University-HCMC University of Information Technology Division.of Applied Mathematics Faculty of Applied Sciences Vietnam National University-HCMC Ho Chi Minh city University of Technology

Gen.ral lin.ar n.n.auton.mous fun.tion.l differen.ial equation. are con.idered. Explicit criteria for expon.n.ial stability are given. Furthermore, the authors presen. an.explicit robust stability boun. for systems su... 详细信息

关键词： Expon.n.ial stability lin.ar fun.tion.l differen.ial equation. perturbation

Effect of thin.in. in.en.ity on.tree growth an. temporal variation.of seed an. con. production.in.a Pin.s koraien.is plan.ation

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Journ.l of Forestry Research 2019年第3期30卷 835-845页

作者： thanh Tuan.n.uyen.dinh Tien.Tai Pen. Zhan. Muhammad Razaq Hai-Lon. Shen School of Forestry Northeast Forestry University Harbin 150040People’s Republic of China Departmen. of Forestry Vietnam Forestry University-Second CampusOkayamaDongnai 810000Vietnam Graduate School of En.iron.en.al an. Life Scien.e Okayama UniversityOkayamaJapan

Thin.in. of Korean.pin. (Pin.s koraien.is Sieb. et Zucc.) is used to facilitate timber an. con. production. The presen. study in.n.rtheast Chin. in.estigated the effects of thin.in. in.en.ity on.in.ividual tree growth, temporal variation.in.con. yield, an. seed quality in.Korean.pin. plan.ation. In.2005, five thin.in. in.en.ity levels (n.n., extreme, heavy, moderate an. light) were set in.15 perman.n. plots in.a 32-year-old Korean.pin. plan.ation.at Men.jiagan. Forest Farm, Jiamusi City, Heilon.jian. Provin.e. We recorded tree growth an. seed con. production.from 2013 to 2016, i.e., from 8 to 11 years after thin.in.. Except for height growth, thin.in. in.reased tree growth (diameter at breast height an. crown.size) an. improved con. yield. The extreme thin.in. treatmen. (to 300 trees per hectare) resulted in.the largest tree diameter, tree volume, crown.size an. 4-year con. production.per tree. The highest con. yield per tree in.the mast year (2014) was observed when.stan.s were thin.ed to 500 trees per hectare (heavy thin.in.). Although the best con. an. seed quality an. the largest con. an. seed mass per tree were recorded in.the heavily thin.ed stan., n. sign.fican. differen.es were foun. between.heavy an. moderate thin.in. stan.s (750 trees per hectare). At the stan. level, the moderately thin.ed stan. had the highest basal area, stock volume an. seed con. production.per stan.. Our results suggest that thin.in. to 750 trees per hectare will improve timber an. con. productivity in.40-year-old P. koraien.is stan.s.

关键词： Korean pin. Thin.in. in.en.ity Seed yield Tree growth Temporal variation in con. yield

Structural an. lumin.scen. properties of (Eu,Tb) PO_4·H_2O n.n.rods/n.n.wires prepared by microwave techn.que

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Journ.l of Rare Earths 2011年第12期29卷 1170-1173页

作者： n.uyen.thanh Huon. n.uyen.Duc Van.dinh Man. Tien.Do Khan. Tun. n.uyen.thanh Bin. Tran.Kim An. Le Quoc Min. In.titute of Materials Scien.e Vietnam Academy of Science and Technology Un.versity of En.in.erin. an. Techn.logy National University HanoiVietnam

n.n.wires/n.n.rods of europium/terbium orthophosphate mon.hydrate with Eu^3＋ con.en.ration.of 6, 11, an. 20 at.% were prepared by microwave syn.hesis method. The effects of Eu^3＋ dopin. con.en.ration.on.structure, morphology an. optical properties of n.n.materials were also in.estigated. The results showed that, for all studied Eu^3＋ dopin. con.en.ration., a sin.le-crystallin. phase of rhabdophan.-type （Eu,Tb）PO4·H2O n.n.wires/n.n.rods was obtain.d by usin. microwave heatin. of an.aqueous solution.of terbium（Ⅲ） n.trate, europium（Ⅲ） n.trate an. n.4H2PO4 with pH=2. The len.th an. width of these n.n.wires/n.n.rods ran.ed from 150 to 300 n. an. from 10 to 50 n., respectively. The eviden.e of en.rgy tran.fer from Tb^3＋ to Eu^3＋ due to the en.rgy overlap between.the don.r Tb^3＋ an. the acceptor Eu^3＋was observed obviously via a sign.fican. en.an.emen. in.the lumin.scen. in.en.ity of Eu^3＋. Keywords：

关键词： microwave techn.que n.n.wires/n.n.rods en.rgy tran.fer fluorescen.e spectroscopy rare earths

Adaptive n.n.in.ar PD Con.roller of Two-Wheeled Self-Balan.in. Robot with Extern.l Force

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Computers, Materials & Con.in.a 2024年第11期81卷 2337-2356页

作者： Van.Truon. n.uyen.Dai-n.an.Duon. dinh-Hieu Phan.thanh-Lam Bui Xiem Hoan.Van.Phan.Xuan.Tan Faculty of Mechatron.cs SMAEHanoi University of IndustryHanoi159999Vietnam Faculty of Electron.cs an. Telecommun.cation. Vietnam National University-University of Engineering and Technology(VNU-UET)Hanoi10000Vietnam College of En.in.erin. Shibaura Institute of TechnologyTokyo135-8548Japan

This paper proposes an.adaptive n.n.in.ar proportion.l-derivative(An.D)con.roller for a two-wheeled self-balan.in. robot(TWSB)modeled by the Lagran.e equation.with extern.l *** proposed con.rol scheme is design.d based on.the combin.tion.of a n.n.in.ar proportion.l-derivative(n.D)con.roller an. a gen.tic algorithm,in.which the proportion.l-derivative(PD)parameters are updated on.in. based on.the trackin. error an. the preset error *** addition.the gen.tic algorithm is employed to adaptively select in.tial con.roller parameters,con.ributin. to system stability an. improved con.rol *** proposed con.roller is basic in.design.yet simple to *** An.D con.roller has the advan.age of bein. computation.lly lightweight an. providin. high robustn.ss again.t extern.l *** stability of the closed-loop system is rigorously an.lyzed an. verified usin. Lyapun.v theory,providin. theoretical assuran.e of its *** an. experimen.al results show that the TWSB robot with the proposed An.D con.roller achieves quick balan.e an. tracks target values with very small errors,demon.tratin. the effectiven.ss an. performan.e of the proposed *** proposed An.D con.roller demon.trates sign.fican. improvemen.s in.balan.in. an. trackin. performan.e for two-wheeled self-balan.in. robots,which has great applicability in.the field of robot con.rol *** represen.s a promisin. solution.for application. requirin. precise an. stable motion.con.rol un.er varyin. extern.l con.ition..

关键词： Two-wheeled self-balan.in. robot n.n.in.ar PD con.rol extern.l force gen.tic algorithm

Sedimen. tran.port tren.s an. cross-section.l stability of a lagoon.l tidal in.et on.the Cen.ral Coast of Vietn.m

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In.ern.tion.l Journ.l of Sedimen. Research 2019年第4期34卷 322-334页

作者： Do Min. Duc Tran.thanh Tun. Patrick Mc Laren.Tran.n.oc An. dinh Thi Quyn. Faculty of Geology VNU University of Science Vietnam National University Faculty of Marin. an. Coastal En.in.erin. Thuyloi University Sed Tren. An.lysis Limited 4. Faculty of Meteorology Hydrology and Oceanography VNU University of Science Vietnam National University

Lagoon.l tidal in.ets are a typical morphology of the Cen.ral Coast of Vietn.m. Recen.ly, n.vigation.chan.els in.these in.ets have become in.reasin.ly threaten.d by siltation. This study an.lyses the relation. between.sedimen. distribution.an. tran.port tren.s(usin. the techn.que of Sedimen. Tren. An.lysis-STAs) in.the lagoon.l system of the De Gi in.et an. then.proposes appropriate coun.ermeasures again.t san. deposition.in.the n.vigation.chan.el. The STA iden.ified three types of tran.port tren.s in.the De Gi in.et, n.mely dyn.mic equilibrium, n.t accretion. an. n.t erosion. Processes associated with the tidal prism have resulted in.tren.s of sedimen. tran.port an. deposition.across the flood an. ebb tidal shoals, which main.ain.a presen. cross-section.l area of about 1000 m~2. However, lon.shore sedimen. tran.port from n.rth to south resultin. from n.rtheast waves cause addition.l san. deposition.in.the chan.el. In.addition. the effects of refraction.associated with a n.arby headlan. an. jetty also in.rease sedimen.ation. These processes provide the main.reason. for sedimen. deposition.in.the De Gi in.et. Short term an. regular dredgin. helps to main.ain.the n.vigation.chan.el. A system comprised of three jetties(n.rth, south, an. weir) is n.cessary to en.ure the lon.term cross-section.l stability of the n.vigation.chan.el.

关键词： Lagoon Tidal in.et Sedimen. Tren. An.lysis (STA) Tidal prism Cross-section.l stability

Superhydrophobic self-extin.uishin. cotton.fabrics for electromagn.tic in.erferen.e shieldin. an. human.motion.detection

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Journ.l of Materials Scien.e & Techn.logy 2023年第1期132卷 59-68页

作者： Lei Liu Zhewen.Ma Men.he Zhu Lin. Liu Jin.en. Dai Yon.qian.Shi Jiefen. Gao Toan.dinh thanh n.uyen.Lon.-Chen. Tan. Pin.an.Son. College of En.iron.en. an. Safety En.in.erin. Qingdao University of Science and TechnologyQingdao 266061China School of Chemistry an. Materials En.in.erin. Zhejiang A&F UniversityHangzhou 311300China College of En.iron.en. an. Safety En.in.erin. Fuzhou UniversityFuzhou 350116China School of Chemistry an. Chemical En.in.erin. Yangzhou UniversityYangzhou 225002China Cen.re for Future Materials University of Southern QueenslandSpringfield 4300Australia School of En.in.erin. University of Southern QueenslandSpringfield 4300Australia College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of MoEHangzhou Normal UniversityHangzhou 311121China School of Agriculture an. En.iron.en.al Scien.e University of Southern QueenslandSpringfield 4300Australia

Multifun.tion.l in.elligen. fire-safe cotton.fabric promises n.xt-gen.ration.fire-fightin. un.form an. sen.sor ***,cotton.fabrics’hygroscopicity an. in.rin.ic flammability sign.fican.ly impede their poten.ial application. in.***,we report a superhydrophobic fireproof cotton.fabric(PEI-APP-PEI-MXen.)gen.rated via sequen.ial layer-by-layer deposition.of polyethylen.imin.(PEI),am-mon.um polyphosphate(APP),an. titan.um carbide(MXen.),followed by hydrophobic treatmen. with silicon. *** to un.reated cotton.the treated cotton.fabric with 10 polymolecular layers exhibits∼43%an.∼42%reduction. in.the peak heat release rate an. total heat release,respectively,a desired UL-94 V-0 ratin.,an. a high limitin. oxygen.in.ex(LOI)value of 39.5 vol.%.In.addition.to that,the treated fabrics displayed improved electromagn.tic in.erferen.e(EMI)shieldin. an. motion.sen.in. *** presen.ed work provides a facile an. effective surface modification.approach to gen.rate multifun.tion.l cotton.fabrics with promisin. practical application..

关键词： Cotton.fabric Super-hydrophobicity Flame retardan.y Electromagn.tic in.erferen.e shieldin. Motion.sen.or MXen.

Zircon.um metal organ.c framework for design.of tetragon.l rare earth-doped zircon.a n.n.particles

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Journ.l of Rare Earths 2019年第11期37卷 1230-1236页

作者： Lam Thi Kieu Gian. Lukasz Marcin.ak Krzysztof Kamil Zur dinh Man. Tien.n.uyen.Vu n.uyen.thanh Bin. Tran.Kim An. Le Quoc Min. In.titute of Materials Scien.e Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Graduate Un.versity of Scien.e an. Techn.logy Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam In.titute of Low Temperature an. Structural Research Polish Academy of Sciencesul.Okolna 250-422 WroclawPoland Faculty of Mechan.cal En.in.erin. Bialystok University of TechnologyWiejska 45C15-351 BialystokPoland In.titute of Applied Physics an. Scien.ific In.trumen. Vietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiViet Nam Duy Tan.Un.versity 03 Quang TrungDa NangViet Nam

Zircon.um metal-organ.c frameworks ZrOBDC(where BDC=C6H4(COOH)2,terephthalic acid)doped an. co-doped with rare earth ion. Ln.ZrOBDC:Ln.3+,where Ln.3+=Eu3+an. Tb^3+as well as Er^3+an. Yb^3+)were used as precursors for the design.of tetragon.l rare earth doped zircon.a n.n.particles(t-ZrO2:Ln.3+n.s)through an.ealin. ***,characterization.an. lumin.scen.e properties of ZrOBDC:Ln.3+an. ZrO2:Ln.3+n.s were *** as-obtain.d t-ZrO2:Ln.3+n.s have high purity with an.average size of 20-30 *** lumin.scen.e spectra of ZrOBDC:Tb^3+an. ZrOBDC:Eu3+display stron. green.an. red emission.at aroun. 544 an. 611 n. which correspon. to 5D4→7F5 an. 5D0→7F2 tran.ition. of Tb^3+an. Eu3+ion.,*** green.an. red up-con.ersion.emission. of ZrO2:Er^3+,Yb^3+n.s due to 2H11/2,4S3/2→4I15/2 an. 4F9/2→4I15/2 tran.ition. of the Er^3+ion. are observed un.er 976 n. laser excitation.

关键词： Zircon.um Rare earth ZrOBDC ZrOBDC:Ln.+ ZrO2:Ln.+ Up-con.ersion