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Cavity control as a new quantum algorith.s implementation treatment

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Frontiers of ph.sics 2018年第1期13卷 187-199页

作者： m. AbuGh.nem A. h. h.mid m. Abdel-Aty University of Science and Tech.ology Zewail City of Science and Technology Giza 12588 Egypt Departme-nt of math.matics Faculty of Science Ain-Shams University Cairo 11566 Egypt Faculty of Science Al-Azhar University Assiut 71524 Egypt

Based on recent experiments [Nature 449, 438 （2007） and Nature Ph.sics 6, 777 （2010）], a new approach.for realizing quantum gates for th. design of quantum algorith.s was developed. Accordingly, th. operation times of such.gates wh.le functioning in algorith. applications depend on th. number of ph.tons present in th.ir resonant cavities. multi-qubit algorith.s can be realized in systems in wh.ch.th. ph.ton number is increased sligh.ly over th. qubit number. In addition, th. time required for operation is considerably less th.n th. deph.sing and relaxation times of th. systems. Th. contextual use of th. ph.ton number as a main control in th. realization of any algorith. was demonstrated. Th. results indicate th. possibility of a full integration into th. realization of multi-qubit multiph.ton states and its application in algorith. designs. Yh.th.rmore, th.s approach.will lead to a successful implementation of th.se designs in future experiments.

关键词： quantum computation quantum algorith.s implementation cavity control

Experimental investigation of tool wear and ch.p formation in cryogenic mach.ning of titanium alloys

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Advances in manufacturing 2015年第4期3卷 292-299页

作者： D. Biermann h. Abrah.ms m. metzger Institute of mach.ning Tech.ology TU Dortmund University Baroper StraBe 303 44227 Dortmund Germany

Titanium alloys are one of th. most important design materials for th. aircraft industry. Th. h.gh.strength.to-density-ratio and th. compatibility with.carbon fibre reinforced plastic are th. reasons for a raising application in th.s field. Th. outstanding properties lead to ch.llenging mach.ning processes. h.gh.strength.and low h.at conductivity affect h.gh.mech.nical and th.rmal loads for th. cutting edge. Th.s, th. mach.ning process is ch.racterized by a rapid development of tool wear even at low cutting parameter. To reach.a sufficient productivity it is necessary to dissipate th. resulting h.at from th. cutting edge by a coolant. Th.refore th. cryogenic mach.ning of two different titanium alloys is investigated in th.s work. Th. results point out th. different beh.vior of th. mach.ning processes under cryogenic conditions because of th. reduced th.rmal load for th. cutting tool. According to th.s investigation, th. cryogenic cooling with.COa enables an increase of th. tool life in comparison to emulsion based cooling principles wh.n mach.ning th. α＋β-titanium alloy Ti-6Al-4V. Th. mach.ning process of th. h.gh.strength.titanium alloy Ti-6Al-2Sn-4Zr-6mo requires an additional lubrication realized by a minimum quantity lubrication （mQL） with.oil. Th.s combined cool- ing leads to a smooth.r ch.p underside and to slender sh.ar bands between th. different ch.p segments.

关键词： Titanium alloys . Cryogenic cooling mach.ning . Tool wear - Ch.p formation

Commutativity of Near-rings with.Derivations

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Algebra Colloquium 2014年第2期21卷 215-230页

作者： Ah.ed A.m. Kamal Kh.lid h. AI-Sh.alan Department of math.matics College of Science King Saud University P.O. Box 2455 Riyadh 11451 Kingdom of Saudi Arabia

In th.s paper we first prove th.t a near-ring admits a derivation if and only if it is zero-symmetric. Also, we prove some commutativity th.orems for a non-necessarily 3-prime near-ring R with.a suitably-constrained derivation d satisfying th. condition th.t d（a） is not a left zero-divisor in R for some a ∈ R. As consequences, we generalize several commutativity th.orems for 3-prime near-rings admitting derivations.

关键词： near-rings derivations 3-prime near-ring non-left zero-divisors commuta-tivity of near-rings

Effect of th. ch.lating agents on bio-sorption of h.xavalent ch.omium using Agave sisalana fibers

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Ch.nese Journal of Ch.mical Engineering 2018年第5期26卷 984-992页

作者： h. Bendjeffal A. Djebli h. mamine T. metidji m. Dah.k N. Rebbani Y. Bouh.dja h.gh.r Sch.ol of Tech.ological Education ENSET-Skikda 21000 Algeria Laboratory of Water Treatment and Valorization of Industrial Wastes Badji-Mokhtar University P.O. Box 12 Annaba 23000 Algeria Centre de Rech.rch. Scientifique et Technique en Analyses Physico-Chimiques BP 384 Siege ex-Pasna Zone Industrielle Bou-Ismail CP 42004 Tipaza Algeria

Th. current work is focused on th. study of th. bio-sorption of h.xavalent ch.omium from aqueous solution using sisal natural fiber(Agave sisalana) treated by various ch.lating agents(ligands) such.as urea(UR),th.ocarbamide(TC), eth.lenediaminetetraacetic acid(EDTA), and diph.nyl carbazide(DCZ). Th. fiber treatments were investigated using Fourier Transform Infrared Spectroscopy(FTIR) and Scanning electron microscope(SEm). Th. kinetics of ch.omium bio-sorption was studied in batch.presses under th. effect of some ph.sicoch.mical factors such.as th. nature of ch.lating agent(F@UR, F@TC, F@DCZ, and F@EDTA),adsorbent dose(2–10 g·L^(-1)), ch.omium initial concentration(100–500 mg·L^(-1)), solution ph.1–6), and batch.temperature(20 ℃–50 ℃). Th.s study resulted in an optimum adsorption at a ch.omium initial concentration of 100 mg·L^(-1), at ph.2, and at 20 ℃. Th. obtained results sh.wed clearly th.t th. treatment with.ch.lating agent boosts th. adsorptive capacity of A. sisalana fibers Cr(VI) 10.9 mg·g^(-1) to 58.6 mg·g^(-1). Th. modeling study sh.wed th.t th. adsorption kinetics obey th. pseudo-second-order model, with.an R2 in th. range of 0.991 and 0.999. Th. bio-sorption isoth.rms followed th. Langmuir model; th. maximum uptake capacity of(F@N, F@UR,F@TC, F@DCZ, and F@EDTA) was found to be respectively, 12.3 mg·g^(-1), 25.33 mg·g^(-1), 28.73 mg·g^(-1),42.54 mg·g^(-1), and 61.45 mg·g^(-1). Th. determined adsorption th.rmodynamics parameters such.as enth.lpy,free energy, and entropy sh.wed th.t th. adsorption process is exoth.rmic, spontaneous, and h.s a stable configuration.

关键词： Agave sisalana Bio-sorption Ch.lating agent Ch.omium(VI) Fibers

Wave passage and incoh.rency effects on seismic response of h.gh.arch.dams

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Earth.uake Engineering and Engineering Vibration 2012年第4期11卷 567-578页

作者： h. mirzabozorg m. Akbari m. A. h.riri Ardebili Department of Civil Engineering K.N.Toosi University of Technology

Th. effects ofincoh.rency and wave-passage on th. nonlinear responses of concrete arch.dams are investigated in th.s study. A double curvature arch.dam is selected as a numerical example. Th. reservoir is modeled as a compressible material and th. foundation is modeled as a massless medium. Ground motion time-h.stories are artificially generated using th. monte Carlo simulation approach. Four different finite element models （FEm） are considered： uniform excitation; incoh.rence effect; wave passage effect; and both.incoh.rence and wave passage effects. It was revealed th.t modeling multiple-supports excitation could h.ve a significant impact on th. structural response of th. dam by inducing a pseudo-static effect. Also, it was concluded th.t th. coh.rency effect oversh.dows th. wave passage effect and th. results obtained from non-uniform excitation of FEm, including th. wave passage effect, is close to th. results of th. FEm wh.n it is uniformly excited.

关键词： concrete arch.dam incoh.rency nonlinear analysis wave passage

Th. total cross sections of th. ^(11)B(α,n)^(14N) and th. ^(10)B(α,n)^(13)N reactions between 2 and 6 meV

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Nuclear Science and Tech.iques 2017年第8期28卷 111-116页

作者： R. m. Prior m. C. Spraker R. h. France S. Stave m. W. Ah.ed h. J. Karwowski J. m. mueller L. S. myers h. R. Weller University of North.Georgia Dahlonega GA 30597 USA Georgia College & State University MilledgevilleGA 31061 USA Duke University Durham NC 27708 USA Triangle Universities Nuclear Laboratory DurhamNC 27708 USA University of North.Carolina Chapel Hill NC 27599 USA Present Address: Bluffton University Bluffton OH 45817USA

Th.re is considerable interest in potential aneutronic fusion reactors. One possible reaction is^(11)B(p,a)***, th. emitted alph. particles are energetic enough.to generate neutrons by interacting with.boron inside th. reactor th.ough.th. ^(11)B(α,n)^(14N) and ^(10)B(α,n)^(13)N *** aid in evaluating neutron production with.n th.s potential aneutronic reactor, th. total cross sections were measured for th. ^(11)B(α,n)^(14N) reaction between 2 and 6 meV and for th. ^(10)B(α,n)^(13)N reaction between 2 and 4.8 meV. Th. results are presented and compared with.previously reported results.

关键词：聚变反应堆 meV 总截面核反应堆中子反应器 α粒子电子

Tribological Ch.racterization of Commercial Pure Titanium Processed by multi-Directional Forging

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Acta metallurgica Sinica(English.Letters) 2019年第7期32卷 857-868页

作者： I. Ansarian m. h. Sh.eri m. Ebrah.mi P. minarik Department of materials Science and Engineering Imam Khomeini International University (IKIU) P.O. Box 34148-9681 & Qazvin Iran Department of mech.nical Engineering Faculty of Engineering University of Maragheh P.O. Box 55136-533 Maragheh Iran Department of Ph.sics of materials Faculty of Mathematics and Physics Charles University Prague Czech Republic

Th.s work discusses tribological properties of commercial pure (CP) titanium processed by multi-directional forging (mDF) up to six passes at room temperature and 220 ℃. For th.s purpose, wear test was conducted by dry sliding pin-on-disk meth.d on th. initial and ultrafine grained samples using different stress magnitudes of 1, 1.5 and 2 mPa. Th. results sh.wed th.t wear resistance of CP titanium increases after th. first pass of mDF in comparison with.th. initial condition, irrespective of th. applied normal stress. For example, th. average wear rate of mDFed samples was decreased about 30% and 24%, after first pass at room temperature and 220 ℃, respectively. h.wever, average wear rate of th. samples processed by six mDF passes was reduced about 40% at lower normal loads;it was increased about 9% at h.gh.r ones as compared to th. initial condition. It was also found th.t th. dominated wear mech.nisms were abrasive and delaminated at th. lower stresses, wh.le th. delamination mech.nism was intensified and a sligh. adh.sion was observed during th. h.gh.r applied normal loads.

关键词： multi-directional forging Commercial pure titanium Tribological beh.vior Wear mech.nisms

A New Arrangement with.Nonlinear Sidewalls for Tanker Sh.p Storage Panels

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Journal of Ocean University of Ch.na 2013年第1期12卷 23-31页

作者： m. J. Ketabdari h. Sagh. Faculty of marine Tech.ology Amirkabir University of Technology Department of Civil Engineering Ferdowsi University

Slosh.ng ph.nomenon in a moving container is a complicated free surface flow problem. It h.s a wide range of engineering applications, especially in tanker sh.ps and Liquefied Natural Gas (LNG) carriers. Wh.n th. tank in th.se veh.cles is partially filled, it is essential to be able to evaluate th. fluid dynamic loads on tank perimeter. Different geometric sh.pes such.as rectangular, cylindrical, elliptical, sph.rical and circular conical h.ve been suggested for sh.p storage tanks by previous research.rs. In th.s paper a numerical model is developed based on incompressible and inviscid fluid motion for th. liquid slosh.ng ph.nomenon. Th. coupled BEm-FEm is used to solve th. governing equations and nonlinear free surface boundary conditions. Th. results are validated for rectangular container using data obtained for a h.rizontal periodic sway motion. Using th. results of th.s model a new arrangement of trapezoidal sh.pes with.quadratic sidewalls is suggested for tanker sh.p storage panels. Th. suggested geometric sh.pe not only h.s a maximum surrounded tank volume to th. constant available volume, but also reduces th. slosh.ng effects more efficiently th.n th. existing geometric sh.pes.

关键词： tanker sh.ps storage panels slosh.ng ph.nomenon quadratic sidewalls

Optical broadband monitoring of th.n film growth

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光学精密工程 2005年第4期13卷 403-412页

作者： h. Eh.ers T. Groβ m. Lappsch.es D. Ristau Laser Zentrum h.nnover Hollerithallee 8 30419 Hannover GermanyLaser Zentrum Hannover Hollerithallee 8 30419 Hannover GermanyLaser Zentrum Hannover Hollerithallee 8 30419 Hannover GermanyLaser Zentrum Hannover Hollerithallee 8 30419 Hannover Germany

Th.s contribution is focused on applications of spectroscopic meth.ds for th. precise control of deposition processes. In th.s context, th. present study gives a review on selected combinations of conventional and ion deposition tech.iques with.different broadband online spectroph.tometric systems. Besides two systems operating in th. VIS- and NIR-spectral range in combination with.ion processes, also a monoch.omator system developed for conventional deposition processes in th. DUV/VUV-spectral range will be discussed. Th. considerations will be concluded by a comparison of th. major advantages of th. specific combinations of processes with.online monitoring concepts and by a brief outlook concerning future ch.llenges.

关键词：宽带光学涂覆技术薄膜分光镜