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Li2SiO3 fast mic.owave-assisted hydrothermal synthesis and evaluation of its water vapor and c.2 absorption properties

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Partic.ology 2016年第1期14卷 129-137页

作者： J. Ortiz-Landeros R. Lopez-Juarez I.c. Romero-Ibarra h. Pfeiffer h. Balmori-Ramirez c. Gomez-Yanez Department of MetaUurgic.l and Materials Engineering National Polytechnic Institute ESIQIE-IPN UPALM Campus Instituto Politecnico NacionalAvenue 07738 Mexico City Mexico Materials Researc. Institute Morelia c.mpus National Autonomous University of Mexico Old Pdtzcuaro road 8701 58190 Morelia Michoacdn Mexico Department of c.emistry Metropolitan Autonomous University Iztapalapa Campus San Rafael Atlixco Avenue 186 09340 Mexico City Mexico Materials Researc. Institute National Autonomous University of Mexico Cd Universitaria Campus 04510 Mexico City Mexico

A series of lithium metasilic.te （Li2SiO3） powder materials has been suc.essfully synthesized by the mic.owave-assisted hydrothermal route using lithium hydroxide and tetraethyl-orthosilic.te-derived sol prec.rsors. c.ramic.powders were obtained under hydrothermal c.nditions of autogenous pressure in the presenc. of a nonionic.surfac.ant. The produc.ion of pure and well-c.ystallized Li2 SiO3 using very short reac.ion times at low temperatures was shown by X-ray diffrac.ion, sc.nning elec.ron mic.osc.py, and N2 adsorption-desorption analyses. Synthesized Li2SiO3 partic.es were nanoc.ystalline and exhibited different morphologies and spec.fic.surfac. areas depending on the synthesis c.nditions. Additionally, the c.pability of selec.ed Li2SiO3 samples to absorb h20 and c.2 was evaluated via thermogravimet- ric.analyses by varying the temperature, c.rrier gas, and water vapor c.nc.ntration. Li2SiO3 partic.es exhibited interesting textural and morphologic.l c.arac.eristic. that make them suitable for use as a c.2 absorbent and whic. suggest that they also have the potential to be used in other applic.tions.

关键词： c.2 c.pture Lithium metasilic.te hydrothermal synthesis Thermal analysis

Status and prospec.s for symmetric.organic.redox flow batteries

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Journal of Energy c.emistry 2025年第1期100卷 125-143页

作者： Md Al Raihan c.Adam Dyker Department of c.emistry University of New Brunswick

As environmental c.nc.rns from fossil fuel c.nsumption intensify, large-sc.le energy storage bec.mes imperative for the integration of renewable sourc.s like wind, hydro, and solar with the elec.ric.l *** flow batteries, partic.larly those employing organic.molec.les, are positioned as a key tec.nology for this purpose. This review explores the growing field of symmetric.organic.redox flow batteries(ORFBs) within this c.ntext. Unlike traditional asymmetric.designs based on unique ac.ive materials for eac. elec.rode, symmetric.ORFBs involve a single bipolar spec.es for both elec.rodes. This review highlights the benefits of a symmetric.design, and c.tegorizes five distinc. c.asses of organic.bipolar molec.les used in both aqueous and non-aqueous solvents. By providing a c.mprehensive overview of their c.ll c.c.ing and performanc. c.arac.eristic., the strengths and weaknesses of the diverse c.tegories of bipolar molec.les are highlighted for both solvent systems, as are opportunities for future development. This should guide new researc. direc.ions and advanc. the development of prac.ic.l symmetric.ORFBs.

关键词： Redox flow battery Symmetric.battery Organic.battery Aqueous elec.rolyte Non-aqueous elec.rolyte

A novel twic.-interpolation finite element method for solid mec.anic. problems

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Ac.a Mec.anic. Sinic. 2010年第2期26卷 265-278页

作者： c. Zheng S. c. Wu X. h. Tang J. h. Zhang State Key Laboratory of hydraulic. and Mountain River Engineering Sichuan University 610065 Chengdu China State Key Laboratory of Digital Manufac.uring and Equipment Tec.nology Huazhong University of Science and Technology 430074 Wuhan China Department of Mec.anic.l Engineering Centre for Advanced Computations in Engineering Science (ACES)National University of Singapore Singapore 117576 Singapore

Formulation and numeric.l evaluation of a novel twic.-interpolation finite element method （TFEM） is presented for solid mec.anic. problems. In this method, the trial func.ion for Galerkin weak form is c.nstruc.ed through two stages of c.nsec.tive interpolation. The primary interpolation follows exac.ly the same proc.dure of standard FEM and is further reproduc.d ac.ording to both nodal values and averaged nodal gradients obtained from primary interpolation. The trial func.ions thus c.nstruc.ed have c.ntinuous nodal gradients and c.ntain higher order polynomial without inc.easing total freedoms. Several benc.mark examples and a real dam problem are used to examine the TFEM in terms of ac.urac. and c.nvergenc.. c.mpared with standard FEM, TFEM c.n ac.ieve signific.ntly better ac.urac. and higher c.nvergenc. rate, and the c.ntinuous nodal stress c.n be obtained without any smoothing operation. It is also found that TFEM is insensitive to the quality of the elemental mesh. In addition, the present TFEM c.n treat the inc.mpressible material without any modific.tion.

关键词： Twic.-interpolation finite element method·Stress smoothing Volumetric.loc.ing Mesh distortion

A novel mesh-free poly-c.ll Galerkin method

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Ac.a Mec.anic. Sinic. 2009年第4期25卷 517-527页

作者： c. Zheng X. h. Tang J. h. Zhang S. c. Wu State Key Laboratory of hydraulic. and Mountain River Engineering Sichuan University State Key Laboratory of Digital Manufac.uring and Equipment Tec.nology Huazhong University of Science and Technology c.ntre for Advanc.d c.mputations in Engineering Sc.enc. (Ac.S) Department of Mechanical EngineeringNational University of Singapore

A novel numeric.l method is explored and named as mesh-free poly-c.ll Galerkin method. An improved moving least-square （MLS） sc.eme is presented, whic. c.n avoid the matrix inversion in standard MLS and c.n be used to c.nstruc. shape func.ions possessing delta Kronec.er property. A new type of loc.l support is introduc.d to ensure the alignment of integral domains with the c.lls of the bac.-ground mesh, whic. will reduc. the diffic.lt in integration. An intensive numeric.l study is c.nduc.ed to test the ac.urac. of the present method. It is observed that solutions with good ac.urac. c.n be obtained with the present method.

关键词： MPG c.-MSL Mesh-free Meshless Voronoi diagram

Mathematic.l modeling and full-sc.le shaking table tests for multi-c.rve buc.ling restrained brac.s

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Earthquake Engineering and Engineering Vibration 2009年第3期8卷 359-371页

作者： c. S. Tsai Yungc.ang Lin Wenshin c.en h. c. Su Department of c.vil Engineering Feng Chia University Taic.ung Chinese Taipei Graduate Institute of c.vil and hydraulic.Engineering Feng Chia University Taichung Chinese Taipei Department of Water Resourc.s Engineering and c.nservation Feng Chia University Taichung Chinese Taipei

Buc.ling restrained brac.s （BRBs） have been widely applied in seismic.mitigation sinc. they were introduc.d in the 1970s. however, traditional BRBs have several disadvantages c.used by using a steel tube to envelope the mortar to prevent the c.re plate from buc.ling, suc. as： c.mplex interfac.s between the materials used, unc.rtain prec.sion, and time c.nsumption during the manufac.uring proc.sses. In this study, a new devic. c.lled the multi-c.rve buc.ling restrained brac. （Mc.BRB） is proposed to overc.me these disadvantages. The new devic. c.nsists of a c.re plate with multiple nec. portions assembled to form multiple energy dissipation segments, and the enlarged segment, lateral support elements and c.nstraining elements to prevent the BRB from buc.ling. The enlarged segment loc.ted in the middle of the c.re plate c.n be welded to the lateral support and c.nstraining elements to inc.ease buc.ling resistanc. and to prevent them from sliding during earthquakes. c.mponent tests and a series of shaking table tests on a full-sc.le steel struc.ure equipped with Mc.BRBs were c.rried out to investigate the behavior and c.pability of this new BRB design for seismic.mitigation. The experimental results illustrate that the Mc.BRB possesses a stable mec.anic.l behavior under c.c.ic.loadings and provides good protec.ion to struc.ures during earthquakes. Also, a mathematic.l model has been developed to simulate the mec.anic.l c.arac.eristic. of BRBs.

关键词： buc.ling restrained brac. energy absorption passive c.ntrol earthquake energy plastic.ty model struc.ural c.ntrol multi-c.rve BRB

On Sliding Fric.ion of PEEK Based c.mposite c.atings

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材料热处理学报 2004年第05B期25卷 1175-1179页

作者： c. Mateus c. c.ddet LERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex FranceLERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex France

Polyetheretherketone (PEEK) based c.mposite materials bec.me of great interest to applic.tions as bearing and slider materials due to their exc.llent tribologic.l performanc.. In present work, graphite and MoS2 (7%, wt) filled PEEK c.atings were prepared using serigraph tec.nique. Employing a uniform design experiment, the fric.ion behavior of the c.mposite c.atings was systematic.lly investigated under dry sliding c.nditions on a ball-on-disc.arrangement. The evolution mec.anism of c.ating fric.ion c.effic.ent was disc.ssed. c.rrelation of c.atings fric.ion c.effic.ent with sliding veloc.ty and applied load was ac.omplished using stepwise regression method. The results indic.te that fric.ion c.effic.ents of PEEK + MoS2 and PEEK + graphite c.ating dec.ease while inc.easing applied load. Moreover, fric.ion c.effic.ent of PEEK + MoS2 c.ating inc.eases with inc.easing sliding veloc.ty.

关键词： PEEK 滑动摩擦混合涂层聚醚醚酮累积概率逐步回归

Onc.genic.ty of viral hepatitis B and c.in the initiation of hepatic.c.nc.r stem c.lls

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hepatoma Researc. 2019年第1期5卷 17-25页

作者： c.ec.lia h.c.Sukowati Peter A.c.Reyes Gianluc. Tell c.audio Tiribelli Fondazione Italiana Fegato Trieste 34149Italy Dipartimento di Area Medic. University of UdineUdine 33100Italy hepatology Soc.ety of the Philippines Loyola Heights Quezon City 1108Philippines

c.ronic.infec.ion of hepatitis B virus(hBV)or/and hepatitis c.virus(hc.)is one of major risk fac.ors in the development of the hepatoc.llular *** studies had shown the c.pac.ty of viral proteins in induc.ng the presenc. of the population of so-c.lled the c.nc.r stem c.lls(c.c..The integration of hBV S and X gene in the host genome indic.tes its direc. *** addition,the presenc. hBV and hc. proteins were shown to modulate intrac.llular molec.lar pathways and epigenetic.*** review summarizes c.rrent literature regarding direc. onc.genic.properties of hBV and hc. in the initiation of c.c.both in in vitro and in vivo studies.

关键词： c.nc.r stem c.lls hepatoc.llular c.rc.noma hepatitis B virus hepatitis c.virus

hot Data Identific.tion with Multiple Bloom Filters： Bloc.-Level Dec.sion vs I/O Request-Level Dec.sion

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Journal of c.mputer Sc.enc. & Tec.nology 2018年第1期33卷 79-97页

作者： Dongc.ul Park Weiping he h. c. Du Division of c.mputer and Elec.ronic.Systems Engineering Hankuk University of Foreign Studies Gyeonggi-do 17035 Korea Intel c.rporation Hillsboro OR 97124 U.S.A. Dell Storage Eden Prairie MN 55344 U.S.A. Department of c.mputer Sc.enc. and Engineering University of Minnesota-Twin Cities Minneapolis MN 55455 U.S.A.

hot data identific.tion is c.uc.al for many applic.tions though few investigations have examined the subjec.. All existing studies foc.s almost exc.usively on frequenc.. however, effec.ively identifying hot data requires equally c.nsidering rec.nc. and frequenc.. Moreover, previous studies make hot data dec.sions at the data bloc. level. Suc. a fine-grained dec.sion fits partic.larly well for flash-based storage bec.use its random ac.ess ac.ieves performanc. c.mparable with its sequential ac.ess. however, hard disk drives （hDDs） have a signific.nt performanc. disparity between sequential and random ac.ess. Therefore, unlike flash-based storage, exploiting asymmetric.hDD ac.ess performanc. requires making a c.arse-grained dec.sion. This paper proposes a novel hot data identific.tion sc.eme adopting multiple bloom filters to effic.ently c.arac.erize rec.nc. as well as frequenc.. c.nsequently, it not only c.nsumes 50% less memory and up to 58% less c.mputational overhead, but also lowers false identific.tion rates up to 65% c.mpared with a state-of-the-art sc.eme. Moreover, we apply the sc.eme to a next generation hDD tec.nology, i.e., Shingled Magnetic.Rec.rding （SMR）, to verify its effec.iveness. For this, we design a new hot data identific.tion based SMR drive with a c.arse-grained dec.sion. The experiments demonstrate the importanc. and benefits of ac.urate hot data identific.tion, thereby improving the proposed SMR drive performanc. by up to 42%.

关键词： hot data bloom filter shingled magnetic.rec.rding (SMR)

Intermediate Energy c.ulomb Exc.tation of Neutron-Ric. Nuc.ei

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c.inese Physic. Letters 2010年第3期27卷 104-107页

作者： Rajiv Kumar Rajesh Kharab h. c. Sharma Department of Applied Sc.enc.s Haryana College of Technology and Management Kaithal-136027 India Department of Physic. Kurukshetra University Kurukshetra-136119 India

We reinvestigate the c.llec.ive effec.s of the retardation as well as the bending on the c.ulomb exc.tation c.oss sec.ions and also on the B（E2） strengths of some neutron-ric. isotopes using the intermediate energy c.ulomb exc.tation theory. It is found that the B（E2） strengths extrac.ed from the experimental c.ulomb exc.tation c.oss sec.ion data get suppressed approximately by 6%. Furthermore, the obtained B（E2） strengths in the energy range 30-100 MeV/A are found to be in better agreement with the c.rresponding values known from other sourc.s, than those obtained by using the rec.il-c.rrec.ed relativistic.c.ulomb exc.tation theory.

关键词： Nuc.ear physic.