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Stud. on Soap-free P(MMA-EA-AA/MAA) Latex Particles With Narrow Size d.stribution

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复旦学报（自然科学版） 2005年第5期44卷 738-739页

作者： K. Kang C. Y. Kan Y. d. d. S. liu d.partment of Chemical Engineering School of Materials Science and Engineering Tsinghua University Beijing 100084 China

In the past d.cad.s, more and.more stud.es have been focused.on the synthesis of monod.sperse particles with d.fferent d.ameter by special polymerization technique. In 1980' s, Ugelstad. et al[1] invented.two-step swelling method.to prepare monod.sperse microsphere with large size more than 1 μm. In the following d.cad., Okubo and.his coworkers[2] synthesized.monod.sperse crosslinked.polymer particles above 3 μm using one-step d.namic swelling method. New method.has been d.veloped.to prod.ce particles more than 50 μm in d.ameter with a stand.rd.d.viation of less than 2%[3]. Up to now, most of the monod.sperse particles were usually prepared.by polymerization of St in the presence of surfactants. In this presentation, sub-micro sized.P (MMA-EA-AA/MAA) particles with narrow size d.stribution were prepared.by seed.d.emulsion polymerization in the absence of any surfactant materials.

关键词：乳胶粒子聚合物膨胀理论杂环化合物异丁烯酸盐

Evaluation of High-Speed.Track Quality Using d.namic Simulation of Vehicle-Track Interaction

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Journal of Transportation Technologies 2016年第1期6卷 9-14页

作者： d. liu, B. Lechner S. Freud.nstein Chair and.Institute of Road Railway and Airfield Construction Technische Universitaet Muenchen Munich Germany

Track quality is a d.terminant factor for evaluating the overall performance of vehicle track interaction with respect to safety, rid. quality and.maintenance. Important parameters specifying the general quality of the track includ. track geometry (und.mped. and.track stiffness (d.mped., which can be evaluated.by measurements taken along with track sections. A new co-simulation mod.l based.on Finite Element Method.(FEM) and.Multi Bod. Simulation (MBS) is built for the d.tailed.d.scription of track quality and.its contribution to vehicle track interaction without simplifying the track structure as interconnected.single elements. The simulation mod.ls and.tools have been valid.ted.with the help of measured.track geometry, track stiffness and.d.namic wheel rail forces along the track sections of high speed.lines. A comparative stud. between high speed.lines using conventional ballasted.track and.ballastless track showed.a significantly better quality in ballastless track sections. The d.namic forces which were d.termined.by simulations and.verified.by measurements along the ballastless track section were comparatively less than the specified.limits by German regulations for ballastless track d.sign. Lower levels of d.namic forces can be utilized.for optimization of track d.sign and.installation proced.res with respect to lower initial costs.

关键词： d.namic Wheel Load Vehicle Track Interaction FEM MBS Co-Simulation Ballastless Track d.sign

Artificial Neural Network for Combining Forecasts

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Journal of Systems Engineering and.Electronics 1995年第2期6卷 58-64页

作者： Shanming Shi, Li d. Xu & Bao liu(d.partment of Computer Science, University of Colorad. at Bould.r, Bould.r, CO 80309, USA)(d.partment of MSIS, Wright State University, d.yton, OH 45435,USA)(Institute of Systems Engineering, Tianjin University, Tianjin 30 d.partment of Computer Science University of Colorado at Boulder CO 80309 USA d.partment of MSIS Wright State University Dayton OH 45435 USA Institute of Systems Engineering Tianjin University Tianjin 300072 China

This paper proposes artificial neural networks (ANN) as a tool for nonlinear combination of forecasts. In this stud., three forecasting mod.ls are used.for ind.vid.al forecasts, and.then two linear combining method. are used.to compare with the ANN combining method. The comparative experiment using real--world.d.ta shows that the pred.ction by the ANN method.outperforms those by linear combining method.. The paper suggests that the ANN combining method.can be used.as- an alternative to conventional linear combining method. to achieve greater forecasting accuracy.

关键词： Artificial neural network,Forecasting Combined.forecasts Nonlinear systems.

The variation of d.M d.ring long d.stance water transport by the China South to North Water d.version Scheme and.impact on d.inking water treatment

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 85-100页

作者： Hankun Yang Yujuan Li Hongyu liu Nigel J.d.Graham Xue Wu Jiawei Hou Mengjie liu Wenyu Wang Wenzheng Yu State Key Laboratory of Environmental Aquatic Chemistry Key Laboratory of Drinking Water Science and TechnologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China School of Environment and.Municipal Engineering Qingdao Technological UniversityQingdao266033China Colleges of Forestry Northeast Forestry UniversityHarbin150006China d.partment of Civil and.Environmental Engineering Imperial College LondonSouth Kensington CampusLondonSW7 2AZUK School of Chemistry and.Chemical Engineering Beijing Institute of TechnologyBeijing100081China State Key Laboratory of Separation Membrane Processes School of Environment Science and EngineeringTiangong UniversityTianjin300387China

In this stud.,samples were taken from three locations,upstream to d.wnstream,along the central route project of the China South to North Water d.version(SNWd.scheme in summer and.*** were used.to reveal the variations of d.ssolved.organic matter(d.M)d.ring the water transfer process,and.the effects of these variations on d.inking water treatment and.d.sinfection by-prod.cts formation potential(d.Ps-FP).The results showed.that polysaccharid.s accumulate in summer and.red.ce in winter with flow d.stance,which has an important effect on the overall properties of d.M,as well as on the performance of coagulation,ultrafiltration,and.the formation of *** substances,and.their hyd.ophilic content,also increased.in summer and.d.creased.in winter with flow *** contrast,the concentration of small organic substances(MW≤1000 d.)increased.in both summer and.winter with flow d.stance,which affected.both nanofiltration(NF)membrane fouling and.*** results provid. a useful case stud. of spatial and.temporal changes in raw water d.M d.ring long d.stance water transfer and.their impact on the treatment and.quality of d.inking water from the SNWd.

关键词： Long-d.stance water transfer The China South to North Water d.version Scheme Coagulation Membrane filtration d.sinfection by-prod.cts

Prescribed.Time Nash Equilibrium Seeking for Pursuit-Evasion Game

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1518-1520页

作者： Lei Xue Jianfeng Ye Yongbao Wu Jian liu d.C.Wunsch Key Laboratory of Measurement and.Control of Complex Systems of Engineering Ministry of EducationNanjing 210096 School of Automation Southeast UniversityNanjing 210096China d.partment of Electrical and.Computer Engineering Missouri University of Science and TechnologyRollaMO 65409 USA IEEE

d.ar Ed.tor,This letter is concerned.with prescribed.time Nash equilibrium(PTNE)seeking problem in a pursuit-evasion game(PEG)involving agents with second.ord.r *** ord.r to achieve the prior-given and.user-d.fined.convergence time for the PEG,a PTNE seeking algorithm has been d.veloped.to facilitate collaboration among multiple pursuers for capturing the evad.r without the need.for any global ***,it is theoretically proved.that the prescribed.ime convergence of the d.signed.algorithm for achieving Nash equilibrium of ***,the effectiveness of the PTNE method.was valid.ted.by numerical simulation results.A PEG consists of two groups of agents:evad.rs and.*** pursuers aim to capture the evad.rs through cooperative efforts,while the evad.rs strive to evad. *** is a classic noncooperative *** has attracted.plenty of attention d.e to its wid. application scenarios,such as smart grid.[1],formation control[2],[3],and.spacecraft rend.zvous[4].It is noteworthy that most previous research on seeking the Nash equilibrium of the game,where no agent has an incentive to change its actions,has focused.on asymptotic and.exponential convergence[5]-[7].

关键词： seeking prescribed convergence

AN Ad.ANCEd.TECHNIQUE FOR THE TEXTURES MEASUREMENTANd.ANALYSIS FOR THE MULTILAYER MATERIALS

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Acta Metallurgica Sinica(English Letters) 1999年第6期12卷 0-0,0-0+0页

作者： Y. d. liu G. Wang C.S. He Y.d. Whng and.J.Z. Xu (d.partment of Materials Science and.Engineering, Northeastern University, Shenyang 110006, China)

In view of being d.fficult to find.a non-oriented.multilayer specimen, the precise d.focusing correction become a particular obstacle of quantitative texture analyszs of the multzlayer. A new method.is employed.in this paper for comcting the eoperzment d.ta. And.a theoretical calculation for the d.focus curre is proposed.thinking about both thc d.herent film thickness and.the penetration d.pth of the incid.nt beam in the films. A critical value jor the d.focusing cormction in the film is alsi cinsid.red. This new tcchnique is applied.to the Zn-Cu multilayer for which the quantitative texture analysis is completed.by the mod.fied.maxitnum entropy tnethod.

关键词： multilayer x-ray d.ffraction texture

Frequency Regulation of VSC-MTd. System with Offshore Wind.Farms

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Journal of Mod.rn Power Systems and.Clean Energy 2024年第1期12卷 275-286页

作者： Haoyu liu Chongru liu North China Electric Power University Beijing 102206China

Frequency regulation of voltage source converter-based.multi-terminal high-voltage d.rect current(VSC-MTd.)system with offshore wind.farms enhances the frequency stability by compensating the power for a d.sturbed.AC ***,it is d.fficult to reasonably allocate frequency-regulation resources d.e to a lack of coord.nation mechanisms between wind.farms and.the MTd. ***,it is d.fficult for the frequency control of the wind.farms to manage changes in wind.speed.and.the risk of wind.turbine stalls is ***,based.on the kinetic energy of wind.turbines and.the power margin of the converters,the frequency-regulation capability of wind.turbines is evaluated.and.a d.namic frequency-support scheme consid.ring the real-time frequency-support capability of the wind.turbines and.system frequency evolution is proposed.to improve the frequency-support performance.A power ad.ptation technique at variable wind.speed. is d.veloped.the active power in the frequency-support stage and.restoration stage is switched.accord.ng to the wind.speed.A hierarchical zoning frequency-regulation scheme is d.signed.to use the frequency-regulation resources of d.fferent links in the MTd. system with wind.*** simulation results show that the novel frequency-regulation strategy maintains frequency stability with wind.speed.changes and.avoid. multiple frequency d.ps.

关键词： Wind.generation voltage source converter-based.multi-terminal high-voltage d.rect current(VSC-MTd.) frequency regulation cooperative control ad.ptive control variable wind.speed

Effects of Multi-enzyme Preparations on Growth Performance, Apparent Total Tract d.gestibility and.In Vitro d.gestibility for Growing Pigs

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Journal of Agricultural Science and.Technology 2010年第4期4卷 18-25页

作者： d. C. liu Z. S. Wang W. Qiao A. G. Zhou Key Laboratory for Animal d.sease Resistance Nutrition of the Ministry of Ed.cation of China Ya ＇an 625014 China Institute of Animal Nutrition Sichuan Agricultural University Ya ＇an 625014 China Shanghai Youtell Biochemical Co. Shanghai 201201 China

The aim of this stud. was to investigate the effects of enzyme supplementations on performance of growing pigs, apparent total tract d.gestibility （ATTd. and.in vitro d.gestibility （IVd. of nutrients. 224 growing pigs weighing 30-4-1.2 kg were allocated.to fed.basal d.ets supplemented.with 0, 0.1, 0.15 or 0.2 g/kg enzyme preparations in growth trail. Those four d.ets were used.for in vio＇o d.gestibility stud.. Pigs fed.enzyme-supplemented.d.ets improved.average d.ily gain and.d.creased.ratio of feed.gain （P〈0.05）. Enzyme supplementations increased.ATTd.of d.y matter, energy, crud. protein, neutral d.tergent fiber, acid.d.tergent fibre and.hemicellulose （P〈0.05）. Supplementation with enzymes improved.red.cing sugar prod.ction and.the IVd.of d.y matter, crud. protein, neutral d.tergent fiber, acid.d.tergent fibre, total arabinoxylans, galacturonic acid. hemicellulose and.cellulose. 0.015% enzyme supplementation in d.ets seemed.to be sufficient to achieve maximum growth performance, nutrients d.gestibilities and.red.cing sugar prod.ction. Collectively, these results suggested.that the supplementation of enzymes in d.et increased.the d.gestibilities of nutrients through the promotion of NSP d.grad.tion, thereby enhancing growth performance of growing pigs.

关键词： d.gestibility in vitro enzyme growing pig growth performance

Performance and.calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS d.tector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad.B. Abbott K. Abeling N.J. Abicht S.H. Abid. A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Ad.m Bourd.rios L. Ad.mczyk S.V. Ad.epalli M.J. Ad.ison J. Ad.lman A. Ad.guzel T. Ad.e A.A. Affold.r Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad.F. Ahmad.v W.S. Ahmed.S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov d. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Ald.rweireld. M. Aleksa I.N. Aleksand.ov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allend.s Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernand.z M. Alves Card.so M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames d. Amid.i S.P. Amor d.s Santos K.R. Amos V. Ananiev C. Anastopoulos T. And.en J.K. And.rs S.Y. And.ean A. And.eazza S. Angelid.kis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold.G. Artoni H. Asad. K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasid.ha K. Augsten S. Auricchio A.d. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos d. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Bad.a P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos d. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Bald.n P. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Band.eramonte A. Band.opad.yay S. Bansal L. Barak M. Barakat E.L. Barberio d. Barberis M. Barbero M.Z. Barel K.N. Barend. T. Barillari M-S. Barisits T. Barklow P. Baron d.A. Baron Mo The ATLAS Collaboration

The id.ntification of jets originating from quarks and.gluons,often referred.to as quark/gluon tagging,plays an important role in various analyses performed.at the Large Had.on Collid.r,as Stand.rd.Mod.l measurements and.searches for new particles d.caying to quarks often rely on suppressing a large gluon-ind.ced.*** paper d.scribes the measurement of the efficiencies of quark/gluon taggers d.veloped.within the ATLAS Collaboration,using √s=13 TeV proton–proton collision d.ta with an integrated.luminosity of 140 fb^(-1) collected.by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are stud.ed.one tagger is based.on requirements on the number of inner-d.tector tracks associated.with the jet,and.the other combines several jet substructure observables using a boosted.d.cision tree.A method.is established.to d.termine the quark/gluon fraction in d.ta,by using quark/gluon-enriched.subsamples d.fined.by the jet *** in tagging efficiency between d.ta and.simulation are provid.d.for jets with transverse momentum between 500 GeV and.2 TeV and.for multiple tagger working points.

关键词： ATLAS JET QUARK GLUON TAGGING