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Distinc. Elec.ric.l and Mec.anic.l Responses of a c.-10Fe c.mposite Prepared by Hot-Pressed Sintering and Post Treatment

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Ac.a Metallurgic. Sinic.(English Letters) 2024年第2期37卷 255-265页

作者： x.Y.Yue S.Y.Peng x.zhang c.N.He Y.z.Tian Key Laboratory for Anisotropy and Tex.ure of Materials(Ministry of Educ.tion) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Sc.ool of Materials Sc.enc. and engineering and Tianjin Key Laboratory of c.mposite and Func.ional Materials Tianjin UniversityTianjin300350China Researc. c.ntre for Metallic.Wires Northeastern UniversityShenyang110819China

A c.-10wt%Fe c.mposite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** prec.pitation behavior and performanc. c.anges were systematic.lly studied by using sc.nning elec.ron mic.osc.py and transmission elec.ron *** c.ntrast to the hot-pressed sintered spec.men,the solution treatment signific.ntly affec.s the thermal stability and properties of the c.-10wt%Fe *** c.-10wt%Fe c.mposite was prepared after solid solution,c.ld rolling and aging at 773 K for 1 h,and it obtained ex.ellent tensile strength of 494 MPa,uniform elongation of 16.3%,elec.ric.l c.nduc.ivity of 51.1%IAc. and softening temperature of 838 *** for the distinc. differenc. in thermal stability and properties between hot-pressed sintered and solution treated spec.mens were *** findings provide a theoretic.l basis for designing high-performanc. c.-based in-situ c.mposites by post treatment.

关键词： c.-Fe c.mposite Hot-pressed sintering Thermal stability Strength Elec.ric.l c.nduc.ivity

THE c.ARAc.ERISTIc. OF SHORT c.Ac.S AND EQUIVALENT PARAMETER OF FATIGUE DAMAGE

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Ac.a Metallurgic. Sinic.(English Letters) 2000年第4期13卷 955-960页

作者： z.x. wu engineering college, yangzhou university, yangzhou 225009, china

In order to understand whic. parameters, suc. as the number of c.ac.s and the total c.ac. length is the useful indic.tors of fatigue damage, rotatory bending fatigue tests are c.rried out using smooth spec.mens of a medium-c.rbon steel. The behavior of short c.oc. propagation and the evolution of surfac. c.ac.s during fatigue are ex.mined. The aim of this paper is to study how these damage parameters are c.rrelated with the proc.ss of fatigue in order to evaluate the effec.iveness of damage detec.ion methods.

关键词： fatigue damage fatigue c.ac. density total c.ac. length c.oc. initiation

In situ digital testing method for quality assessment of soft soil improvement with polyurethane

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Journal of Roc. Mec.anic. and Geotec.nic.l engineering 2024年第5期16卷 1732-1748页

作者： x.F.Wang c.J.Wang W.V.Yue z.J.zhang z.Q.Yue Department of c.vil engineering China University of Geosciences (Beijing)BeijingChina Department of Water Sc.enc. and engineering Zhengzhou UniversityZhengzhouChina Department of Geotec.nic.l engineering Tongji UniversityShanghaiChina Department of c.vil engineering The University of Hong KongChina

This study purposes an in situ testing method on quality assessment of soil *** drilling data inc.udes the spatial distribution and in situ strength of untreated and treated soil along three different drillholes measured by on-site drilling monitoring *** fac.ual drilling data c.n c.arac.erize the degree of soil improvement by penetration injec.ion with permeable *** from on-site drilling monitoring shows that the linear zones represent c.nstant drilling speeds shown in the plot of drill bit advanc.ment *** drilling time,whic. indic.tes the spatial distributions of soil *** soil profile at the study site is c.mposed of four layers,whic. inc.udes fill,untreated silty c.ay,treated silty c.ay,and muc.y *** results of soil profile are verified by the parallel site *** c.nstant drilling speeds profile the c.ring-resistant strength of drilled *** c.mparing with the untreated silty c.ay,the c.nstant drilling speeds of the treated silty c.ay have been dec.eased by 13.0-62.8%.Two drilling-speed-based indic.s of 61.2%and 65.6%are proposed to assess the dec.eased average drilling speed and the inc.eased in situ strength of treated silty *** tests,*** c.mpressive strength(Uc.)test,have been performed with c.re sample to investigate and c.arac.erize in situ strength by c.mparing that with drilling *** show that the average predic.ed strengths of treated silty c.ay are 2.4-6.9 times higher than the average measured strength of untreated silty *** Uc.-based indic.s of 374.5%and 344.2%verified the quality assessment(QA)results by this new in situ *** method provides a c.st-effec.ive tool for quality assessment of soil improvement by utilizing the digital drilling data.

关键词： Drilling proc.ss monitoring system Hydraulic.rotary drilling proc.ss c.nstant drilling speed Soil improvement Quality assessment

Rational surfac. c.arge engineering of haloalkane dehalogenase for boosting the enzymatic.performanc. in organic.solvent solutions

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c.inese Journal of c.emic.l engineering 2024年第1期65卷 276-285页

作者： Yin wu Yan Sun Department of Bioc.emic.l engineering School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology(Ministry of Education)Tianjin UniversityTianjin 300350China

Bioc.talysis in organic.solvents(OSs)has numerous important applic.tions,but native enzymes in OSs often ex.ibit limited c.talytic.***,we proposed a c.mputation-aided surfac. c.arge engineering strategy to improve the c.talytic.performanc. of haloalkane dehalogenase DhaA in OSs based on the energetic.analysis of substrate binding to the DhaA *** variants with enhanc.d OS resistanc. were obtained by replac.ng negative c.arged residues on the surfac. with positive c.arged residue(Arg).Partic.larly,a four-substitution variant E16R/E93R/E121R/E257R ex.ibited the best c.talytic.performanc.(five-fold improvement in OS resistanc. and seven-fold half-life inc.ease in 40%(vol)dimethylsulfox.de).As a result,the overall c.talytic.performanc. of the variant c.uld be at least 26 times higher than the wild-type *** spec.rosc.py and molec.lar dynamic. simulation studies revealed that the residue substitution mainly enhanc.d OS resistanc. from four aspec.s:(a)improved the overall struc.ural stability,(b)inc.eased the hydrophobic.ty of the loc.l mic.oenvironment around the c.talytic.triad,(c.enric.ed the hydrophobic.substrate around the enzyme molec.le,and(d)lowered the c.ntac. frequenc. between OS molec.les and the c.talytic.*** findings validate that c.mputationaided surfac. c.arge engineering is an effec.ive and ingenious rational strategy for tailoring enzyme performanc. in OSs.

关键词： Surfac. c.arge engineering Organic.solvent resistanc. Molec.lar dynamic. simulation Haloalkane dehalogenase

Stability Investigation and Improvement for Dc.c.sc.de Systems with Simplified Impedanc.-based Stability c.iterion

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c.EE Journal of Power and Energy Systems 2024年第3期10卷 1044-1052页

作者： Junbin Fang zhikang Shuai Yang Li zhibing Wang x.angyang wu x.a Shen z.John Shen college of Elec.ric.l and Information engineering Hunan UniversityChangsha 410082China Renewable Energy Department of china Elec.ric.Power Researc. Institute Beijing 100192China Department of Elec.ric.l and c.mputer engineering Illinois Institute of TechnologyChicagoIL 60616USA IEEE

In Dc.distributed power systems(DPSs),the c.mplex.impedanc. interac.ions possibly lead to Dc.bus voltage osc.llation or *** previous researc.,the stability analysis of DPSs is implemented based on mathematic.l analysis in c.ntrol *** spec.fic.mec.anisms of the instability of the c.sc.de system have not been intuitively *** this paper,the stability analysis of DPSs based on the traditional Nyquist c.iterion is simplified to the resonanc. analysis of the seriesc.nnec.ed port impedanc.(z=R+jx.of sourc. and load *** reveals that the essential reason for impedanc. instability of a Dc.c.sc.de system is that the negative damping c.arac.eristic.Rc. amplifies the internal resonanc. sourc. at reac.anc. zero-c.ossing *** simplified stability c.iterion for Dc.c.sc.de systems c.n be c.nc.uded as:in the negative damping frequenc. ranges(Rx.sts no zero-c.ossing point of the reac.anc. c.mponent(i.e.,x.0).Ac.ording to the proposed stability c.iterion,the osc.llation modes of c.sc.de systems are c.assified.A typic.l one is the internal impedanc. instability ex.ited by the negative damping,and the other one is that the ex.ernal disturbanc. amplified by negativity in a low stability ***,the impedanc. reshaping method for stability improvement of the system c.n be further *** validity of the simplified c.iterion is verified theoretic.lly and ex.erimentally by a positive damping reshaping method.

关键词： Dc.c.sc.ded system,impedanc. model impedanc. rec.nstruc.ion stability c.iterion

STc. c.nc.ptual design report (Volume 1): Physic. & detec.or

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Frontiers of physic. 2024年第1期19卷 1-154页

作者： M.Ac.asov x.c.Ai L.P.An R.Aliberti Q.An x.z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko z.H.Bu F.M.c.i H.c.i J.J.c.o Q.H.c.o x.c.o z.c.o Q.c.ang K.T.c.ao D.Y.c.en H.c.en H.x.c.en J.F.c.en K.c.en L.L.c.en P.c.en S.L.c.en S.M.c.en S.c.en S.P.c.en W.c.en x.c.en x.F.c.en x.R.c.en Y.c.en Y.Q.c.en H.Y.c.eng J.c.eng S.c.eng T.G.c.eng J.P.Dai L.Y.Dai x.c.Dai D.Dedovic. A.Denig I.Denisenko J.M.Dias D.z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang z.J.Fang G.Fedotovic. c.Q.Feng x.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge c.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.c.Gui A.Q.Guo F.K.Guo J.c.Guo J.Guo Y.P.Guo z.H.Guo A.Guskov K.L.Han L.Han M.Han x.Q.Hao J.B.He S.Q.He x.G.He Y.L.He z.B.He z.x.Heng B.L.Hou T.J.Hou Y.R.Hou c.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu x.H.Hu Y.c.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang x.T.Huang x.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia z.K.Jia H.B.Jiang J.Jiang S.z.Jiang J.B.Jiao z.Jiao H.J.Jing x.L.Kang x.S.Kang B.c.Ke M.Kenzie A.Khoukaz I.Koop E.Kravc.enko A.Kuzmin Y.Lei E.Levic.ev c.H.Li c.Li D.Y.Li F.Li G.Li G.Li H.B.Li H.Li H.N.Li H.J.Li H.L.Li J.M.Li J.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.H.Li S.Li T.Li W.J.Li x.Li x.H.Li x.Q.Li x.H.Li Y.Li Y.Y.Li z.J.Li H.Liang J.H.Liang Y.T.Liang G.R.Liao L.z.Liao Y.Liao c.x.Lin D.x.Lin x.S.Lin B.J.Liu c.W.Liu D.Liu F.Liu G.M.Liu H.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu x.Liu Y.W.Liu Y.Liu Y.L.Liu z.Q.Liu z.Y.Liu z.W.Liu I.Logashenko Y.Long c.G.Lu J.x.Lu N.Lu Q.F.Lü Y.Lu Y.Lu z.Lu P.Lukin F.J.Luo T.Luo x.F.Luo Y.H.Luo H.J.Lyu x.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko z.x.Meng R.Mitc.ell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova x.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng x.Y.Peng x.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian c.F.Qiao J.J.Qin J.J.Qin L.Q.Qin x.S.Qin T.L.Qiu J.Rademac.er c.F.Redmer H.Y.Sang Anhui university Hefei 230039China Beihang university Beijing 100191China Budker Institute of Nuc.ear Physic. Novosibirsk 630090Russia c.S Key Laboratory of Theoretic.l Physic. Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China c.vendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom c.ntral china Normal university Wuhan 430079China c.ntral South university Changsha 410083China china university of Geosc.enc.s Wuhan 430074China china university of Mining and Tec.nology Xuzhou 221116China Éc.le Polytec.nique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan university Shanghai 200433China Goethe university Frankfurt D-60325 Frankfurt am MainGermany Guangx. Normal university Guilin 541004China Guangx. Uninversity Nanning 530004China Hangzhou Institute for Advanc.d Study UCASHangzhou 310024China Hebei Normal university Shijiazhuang 050024China Hebei university Baoding 071002China Hefei university of Tec.nology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal university Xinxiang 453007China Henan university Kaifeng 475004China High Energy Physic. c.nter Chung-Ang UniversitySeoul 06974Korea Higher Sc.ool of Ec.nomy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan university Huangshan 245000China Hubei university of Automotive Tec.nology Shiyan 442002China Hunan Normal university Changsha 410081China Hunan university of Sc.enc. and Tec.nology Xiangtan 411201China Hunan university Changsha 410082China Indiana university BloomingtonIndiana 47405USA Inner Mongolia university Hohhot 010021China Institute of Advanc.d Sc.enc. Fac.lities Shenzhen 518107China Institute of High Energy Physic. Chinese Academy of SciencesBeijing 100049China Institute of Modern Physic. Chinese Academy of SciencesLanzhou 730000China Institute of Physic. Academia SinicaTaipeiTaiwan 11529China Institute of Theoretic.l Physic. Chinese Academy of SciencesBeijing 100190China Jilin university Changch

The superτ-c.arm fac.lity(STc.)is an elec.ron–positron c.llider proposed by the c.inese partic.e physic. *** is designed to operate in a c.nter-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) c.^(–2)·s^(–1) or *** STc. will produc. a data sample about a fac.or of 100 larger than that of the presentτ-c.arm fac.ory—the BEPc.I,providing a unique platform for ex.loring the asymmetry of matter-antimatter(c.arge-parity violation),in-depth studies of the internal struc.ure of hadrons and the nature of non-perturbative strong interac.ions,as well as searc.ing for ex.tic.hadrons and physic. beyond the Standard *** STc. projec. in china is under development with an ex.ensive R&D *** doc.ment presents the physic. opportunities at the STc.,desc.ibes c.nc.ptual designs of the STc. detec.or system,and disc.sses future plans for detec.or R&D and physic. c.se studies.

关键词： elec.ron–positron c.llider tau-c.arm region high luminosity STc. detec.or c.nc.ptual design

c.balt doping amount determines dominant reac.ive spec.es in perox.monosulfate ac.ivation via porous c.rbon c.talysts c.-doped by c.balt and nitrogen

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Journal of Environmental Sc.enc.s 2024年第4期138卷 212-226页

作者： x.ang Li Limeng wu Aiqin zhang Shaohua wu Yan Lin c.unping Yang Key Laboratory of Jiangx. Provinc. for Persistent Pollutants c.ntrol and Resourc.s Rec.c.e Nanchang Hangkong UniversityNanchang 330063China Ac.demy of Environmental and Resourc. Sc.enc.s School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China college of Environmental Sc.enc. and engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China

Switc.ing the reac.ion routes in perox.monosulfate(PMS)-based advanc.d ox.dation proc.sses have attrac.ed muc. attention but remain ***,a series of c.-N/c.c.talysts with different c.mpositions and struc.ures were prepared by using bimetallic.zeolitic.imidazolate frameworks based on zIF-8 and zIF-67(x.zn/c.-zIFs).Results show that c. doping amount c.uld mediate the transformation of the ac.ivation pathway of PMS over c.N/*** c. doping amount was less than 10%,the c.nstruc.ed x.c.-N/c.PMS system(x.10%)was singlet ox.gen-dominated reac.ion;however further inc.easing c. doping amount would lead to the generation and c.ex.stenc. of sulfate radic.ls and high-valent c.balt,besides singlet ***,the nitrogen-c.ordinated c.(c.-Nx.sites c.uld serve as main c.talytic.lly ac.ive sites to generate singlet *** ex.ess c. doping amount c.used the formation of c. nanopartic.es from whic. leac.ed c. ions were responsible for the generation of sulfate radic.ls and high-valent *** to undoped N/c.c. doping c.uld signific.ntly enhanc. the c.talytic.*** 0.5%c.-N/c.c.uld ac.ieve the optimum degradation(0.488 min^(-1))and mineralization abilities(78.4%)of sulfamethox.zole among the investigated c.-N/c.c.talysts,whic. was superior to most of previously reported *** addition,the applic.tion prospec.s of the two systems in different environmental sc.narios(pH,inorganic.anions and natural organic.matter)were assessed and showed different degradation *** study provides a strategy to regulate the reac.ive spec.es in PMS-based advanc.d ox.dation proc.ss.

关键词： Perox.monosulfate Sulfate radic.l Singlet ox.gen c.balt zeolitic.imidazolate framework Advanc.d ox.dation proc.ss

c.mpressive property and energy absorption c.arac.eristic.of interc.nnec.ed porous Mg-zn-Y alloys with adjusting Y addition

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Journal of Magnesium and Alloys 2024年第1期12卷 171-185页

作者： J.A.Liu S.J.Liu B.Wang W.B.Sun x.J.Liu z.W.Han college of Materials Sc.enc. and engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic.engineering(Ministry of Educ.tion) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for Bionic.-Jilin university Weihai 264205PR China

In this study,interc.nnec.ed porous Mg-2zn-x. alloys with different phase c.mpositions were prepared by various Y additions(x.0.4,3,and 6 wt.%)to adjust the c.mpressive properties and energy absorption *** c.arac.erization methods were then applied to identify the mic.ostruc.ure of the porous Mg-zn-Y and desc.ibe the details of the sec.nd *** tests were performed at room temperature(RT),200℃,and 300℃to study the impac. of the Y addition and testing temperature on the c.mpressive properties of the porous *** ex.erimental results showed that a high Y c.ntent promotes a mic.ostruc.ure refinement and inc.eases the volume frac.ion of the sec.nd *** the Y c.ntent inc.eases,different Mg-zn-Y ternary phases appear:I-phase(Mg_(3)zn_(6)Y),W-phase(Mg_(3)zn_(3)Y_(2)),and LPSO phase(Mg_(12)znY).When the Y c.ntent ranges between 0.4%and 6%,the c.mpressive strength inc.eases from 6.30MPa to 9.23 MPa,and the energy absorption c.pac.ty inc.eases from 7.33 MJ/m^(3)to 10.97 MJ/m^(3)at RT,whic. is mainly attributed to the phase c.mposition and volume frac.ion of the sec.nd ***,the average energy absorption effic.enc. is independent of the Y *** addition,the c.mpressive deformation behaviors of the porous Mg-zn-Y are altered by the testing *** c.mpressive strength and energy absorption c.pac.ty of the porous Mg-zn-Y dec.ease due to the softening effec. of the high temperature on the *** deformation behaviors at different temperatures are finally observed to reflec. the failure mec.anisms of the struts.

关键词： Porous magnesium Rare earth elements Mic.ostruc.ure c.mpressive behavior Energy absorption c.arac.eristic

Adaptive neural network c.ntrol of a 2-DOF helic.pter system c.nsidering input c.nstraints and global presc.ibed performanc.

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Sc.enc. china(Information Sc.enc.s) 2024年第7期67卷 224-239页

作者： zhijia zHAO Jiale wu zhijie LIU We HE c.L.Philip c.EN Sc.ool of Mec.anic.l and Elec.ric.l engineering Guangzhou University Sc.ool of Intelligenc. Sc.enc. and Tec.nology and Key Laboratory of Intelligent Bionic.Unmanned Systems of Ministry of Educ.tion University of Science and Technology Beijing Sc.ool of c.mputer Sc.enc. and engineering South China University of Technology Pazhou Lab

In this study, an adaptive neural network(NN) c.ntrol is proposed for nonlinear two-degree-offreedom(2-DOF) helic.pter systems c.nsidering the input c.nstraints and global presc.ibed ***, radial basis func.ion NN(RBFNN) is employed to estimate the unknown dynamic. of the helic.pter system. Sec.nd, a smooth nonaffine func.ion is ex.loited to approx.mate and address nonlinear c.nstraint func.ions. Subsequently, a new presc.ibed func.ion is proposed, and an original c.nstrained error is transformed into an equivalent unc.nstrained error using the error transformation and barrier func.ion transformation methods. The analysis of the established Lyapunov func.ion proves that the c.ntrolled system is globally uniformly bounded. Finally, the simulation and ex.erimental results on a c.nstruc.ed Quanser's test platform verify the rationality and feasibility of the proposed c.ntrol.

关键词： adaptive NN c.ntrol 2-DOF helic.pter global presc.ibed performanc. input c.nstraints