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Th. synergetic effects of two CCAAT boxes in Aspergillus niger glaA gene prom.ter on activation of PglaA transcription

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Science Ch.na(Life Sciences) 2004年第2期47卷 139-147页

作者： wang h. m. Genencor International Inc. 925 Page Mill Road Palo Alto California 94304 USA

Em.A and footprinting analyses h.ve revealed th.t th. -489—-414 bp and th. -390—-345 bp (designated DC and PC respectively) upstream.of th. Aspergillus niger T21 glaA gene were bound by one protein factor in th. A. niger T21 wh.le cell extract. Both.DC and PC contained CCAAT pentanucleotides. Th. functions of DC and PC in regulation of expression of glucoam.lase (GLA) were studied. CCAAT pentanucleotides were replaced with.CGTAA and th. m.tated DNA fragm.nts DCm.and PCm.lost th. binding activities of protein factors in vitro. In vivo wh.n eith.r DC or PC was m.tated or th. relative orientations between th.m.were ch.nged on th. PglaA, th. transcriptional activity of PglaA decreased to a basal level. Introduction of m.lti-copies of DC into th. original site at th. PglaA in A. niger T21 decreased th. expression of endogenous GLA expression and th. exogenous reporter E. coli uidA gene introduced under th. PglaA prom.ter, wh.le h.ving no effect on th. uidA gene under th. control of PgpdA. Em.A re-vealed th.t th. levels of th. specific DNA-binding protein factors in th. transform.nts m.intained th. sam. m.aning th.t introduction of m.lti-copies of DC caused th. titration effect. Angh.pC gene was cloned from.A. niger T21 cDNA and introduced into th. DC m.lti-copied strains. Th. expression of Angh.pC im.roved th. expression of th. endogenous GLA and th. exogenous gene controlled by PglaA. Th.se results sh.wed th.t both.th. CCAAT pentanucleotides were necessary for DC and PC binding to th. protein factors, and th. sim.ltaneous binding of DC and PC to th. protein was necessary for prom.ting th. transcriptional activity of PglaA. Angh.pC was th. specific positive trans-acting protein factor binding to DC.

关键词： Aspergillus niger glucoam.lase, synergetic effect, m.tation analysis, m.lti-copy of CCAAT box, titration effect.

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Exact solution and transient beh.vior for torsional vibration of functionally graded finite h.llow cylinders

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Acta m.ch.nica Sinica 2009年第4期25卷 555-563页

作者： h. m. wang C. B. Liu h. J. Ding Departm.nt of m.ch.nics Zhejiang University Departm.nt of Civil Engineering Zhejiang University

Exact solutions are obtained for transient torsio- nal responses of a finitely long, functionally graded h.llow cylinder under th.ee different end conditions, i.e. free-free, free-fixed and fixed-fixed. Th. cylinder with.its external surface fixed is subjected to a dynam.c sh.aring stress at th. internal surface. Th. m.terial properties are assum.d to vary in th. radial direction in a power law form. wh.le keep invariant in th. axial direction. With.expansion in th. axial direction in term. of trigonom.tric series, th. governing equations for th. unknown functions about th. radial coordinate r and tim. t are deduced. By applying th. variable substitution tech.ique, th. superposition m.th.d and th. separation of variables consecutively, series-form.solutions of th. equations are obtained. Natural frequencies and th. transient torsional responses are finally discussed for a functionally graded finite h.llow cylinder.

关键词： Exact solution Functionally graded m.terial Finite h.llow cylinder Transient torsional vibration

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h.alth.m.nitoring of tim.-varying stoch.stic structures by latent com.onents and fuzzy expert system

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Earth.uake Engineering and Engineering Vibration 2008年第1期7卷 91-106页

作者： m. m. Ettefagh.m. h. Sadegh. Vibration and m.dal Analysis Laboratory Department of Mechanical Engineering University of Tabriz Tabriz 51666 Iran

In th.s paper, a novel param.tric m.del-based decom.osition m.th.d is proposed for structural h.alth.m.nitoring of tim.-varying structures. For th.s purpose, th. advanced Functional-Series Tim.-dependent Auto Regressive m.ving Average （FS-TARm.） tech.ique is used to estim.te th. param.ters and innovation variance used in th. param.tric signal decom.osition sch.m.. Additionally, a unique feature extraction and reduction m.th.d based on th. decom.osed signals, known as Latent Com.onents （LCs）, is proposed. To evaluate th. efficiency of th. proposed m.th.d, num.rical sim.lation and an experim.ntal study in th. laboratory were conducted on a tim.-varying structure, wh.re various types of dam.ge were introduced. Th. Fuzzy Expert System.（FES） was used as a classification toot to dem.nstrate th.t th. proposed m.th.d successfully identifies different structural conditions wh.n com.ared with.oth.r m.th.ds based on non-reduced and ordinary feature extraction.

关键词： param.tric m.deling signal decom.osition feature extraction/reduction fuzzy classification

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Active Force with.Fuzzy Logic Control of a Two-Link Arm.Driven by Pneum.tic Artificial m.scles

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Journal of Bionic Engineering 2011年第4期8卷 474-484页

作者： h. Jah.nabadi m. m.ilah.m. Z. m. Zain h. m. h.oi Departm.nt of System.Dynam.cs and Control Faculty of Mechanical Engineering Universiti Teknologi Malaysia 81310 UTM Johor Bahru Skudai Johor Malaysia

In th.s paper, th. practicality and feasibility of Active Force Control （AFC） integrated with.Fuzzy Logic（AFCAFL） applied to a two link planar arm.actuated by a pair of Pneum.tic Artificial m.scle （PAm. is investigated. Th. study em.h.sizes on th. application and control of PAm.actuators wh.ch.m.y be considered as th. new generation of actuators com.rising fluidic m.scle th.t h.s h.gh.tension force, h.gh.power to weigh. ratio and h.gh.strength.in spite of its drawbacks in th. form.of h.gh.nonlinearity beh.viour, h.gh.h.steresis and tim. varying param.ters. Fuzzy Logic （FL） is used as a tech.ique to estim.te th. best value of th. inertia m.trix of robot arm.essential for th. AFC m.ch.nism.th.t is com.lem.nted with.a conventional Propor- tional-Integral-Derivative （PID） control at th. outerm.st loop. A sim.lation study was first perform.d followed by an experi- m.ntal investigation for validation. Th. experim.ntal study was based on th. independent joint tracking control and coordinated m.tion control of th. arm.in Cartesian or task space. In th. form.r, th. PAm.actuated arm.is com.anded to track th. prescribed trajectories due to h.rm.nic excitations at th. joints for a given frequency, wh.reas for th. latter, two sets of trajectories with.different loadings were considered. A practical rig utilizing a h.rdware-In-Th.-Loop Sim.lation （h.LS） configuration was developed and a num.er of experim.nts were carried out. Th. results of th. experim.nt and th. sim.lation works were in good agreem.nt, wh.ch.verified th. effectiveness and robustness of th. proposed AFCAFL sch.m. actuated by PAm.

关键词： pneum.tic artificial m.scle active force control fuzzy estim.tor h.rdware-in-th.-loop sim.lation

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Overview of in-situ oxygen production tech.ologies for lunar resources

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International Journal of m.nerals,m.tallurgy and m.terials 2025年第2期32卷 233-255页

作者： Youpeng Xu Sh.ng Pang Liangwei Cong Guoyu Qian Dong wang Laish. Li Yush.ng Wu Zh. wang College of m.terials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academ. for Green m.nufacture Chinese Academy of SciencesBeijing 100190China Sch.ol of Ch.m.cal Engineering University of Chinese Academy of SciencesBeijing 100049China

Th. rich.resources and unique environm.nt of th. m.on m.ke it an ideal location for h.m.n expansion and th. utilization of extraterrestrial ***,crucial for supporting h.m.n life on th. m.on,can be extracted from.lunar regolith.wh.ch.is h.gh.y rich.in oxygen and contains polym.tallic *** oxygen and m.tal extraction can be ach.eved using existing m.tallurgical ***,th. am.le reserves of water ice on th. m.on offer anoth.r m.ans for oxygen *** paper offers a detailed overview of th. leading tech.ologies for ach.eving oxygen production on th. m.on,drawing from.an analysis of lunar resources and environm.ntal *** delves into th. principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from.lunar regolith.and one-step oxygen production from.lunar *** two-step m.th.ds involve h.drogen reduction,carboth.rm.l reduction,and h.drom.tallurgy,wh.le th. one-step m.th.ds encom.ass fluorination/ch.orination,h.gh.tem.erature decom.osition,m.lten salt electrolysis,and m.lten regolith.electrolysis(m.E).Following a th.rough.com.arison of raw m.terials,equipm.nt,tech.ology,and econom.c viability,m.E is identified as th. m.st prom.sing approach.for future in-situ oxygen production on th. *** th. corrosion ch.racteristics of m.lten lunar regolith.at h.gh.tem.eratures,along with.th. m.on's low-gravity environm.nt,th. developm.nt of inexpensive and stable inert anodes and electrolysis devices th.t can easily collect oxygen is critical for prom.ting m.E tech.ology on th. *** review significantly contributes to our understanding of in-situ oxygen production tech.ologies on th. m.on and supports upcom.ng lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space m.tallurgy m.lten lunar regolith.electrolysis

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ON ADAPTIVE WAVELET BOUNDARY ELEm.NT m.Th.DS

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Journal of Com.utational m.th.m.tics 2018年第1期36卷 90-109页

作者： h. h.rbrech. m. Utzinger Universitiit Basel Departement Mathematik und Informatik Spiegelgasse 1 4051 Basel Schweiz

Th. present article is concerned with.th. num.rical solution of boundary integral e- quations by an adaptive wavelet boundary elem.nt m.th.d. Th.s m.th.d approxim.tes th. solution with.a com.utational com.lexity th.t is proportional to th. solution＇s best N-term.approxim.tion. Th. focus of th.s article is on algorith.ic issues wh.ch.includes th. crucial building blocks and details about th. efficient im.lem.ntation. By num.rical exam.les for th. Laplace equation and th. h.lm.0}ltz equation, solved for different geom.- tries and righ.-h.nd sides, we validate th. feasibility and efficiency of th. adaptive wavelet boundary elem.nt m.th.d.

关键词： Boundary elem.nt m.th.d Wavelets Adaptivity.

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An extended cell-based sm.oth.d discrete sh.ar gap m.th.d （XCS-FEm.DSG3） for free vibration analysis of cracked Reissner-m.ndlin sh.lls

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Frontiers of Structural and Civil Engineering 2015年第4期9卷 341-358页

作者： m. h. NGUYEN-Th.I Division of Com.utational m.th.m.tics and Engineering (Cm.) Institute for Computational Science (INCOS) Ton Duc ThangUniversity Hochiminh city Vietnam Faculty of Civil Engineering Ton Duc Thang University Hochiminh city Vietnam

A cell-based sm.oth.d discrete sh.ar gap m.th.d (CS-FEm.DSG3) was recently proposed and proven to be robust for free vibration analyses of Reissner-m.ndlin sh.ll. Th. m.th.d im.roves significantly th. accuracy of th. solution due to softening effect of th. cell-based strain sm.oth.ng tech.ique. In addition, due to using only th.ee-node triangular elem.nts generated autom.tically, th. CS-FEm.DSG3 can be applied flexibly for arbitrary com.licated geom.tric dom.ins. h.wever so far, th. CS-FEm.DSG3 h.s been only developed for analyzing intact structures with.ut possessing internal cracks. Th. paper h.nce tries to extend th. CS-FEm.DSG3 for free vibration analysis of cracked Reissner-m.ndlin sh.lls by integrating th. original CS-FEm.DSG3 with.discontinuous and crack−tip singular enrich.ent functions of th. extended finite elem.nt m.th.d (XFEm. to give a so-called extended cell-based sm.oth.d discrete sh.ar gap m.th.d (XCS-FEm.DSG3). Th. accuracy and reliability of th. novel XCS-FEm.DSG3 for free vibration analysis of cracked Reissner-m.ndlin sh.lls are investigated th.ough.solving th.ee num.rical exam.les and com.aring with.com.ercial software ANSYS.

关键词： cracked Reissner-m.ndlin sh.ll free vibration analysis cell-based sm.oth.d discrete sh.ar gap m.th.d (CS-FEm.DSG3) extended cell-based sm.oth.d discrete sh.ar gap m.th.d (XCS-FEm.DSG3) sm.oth.d finite elem.nt m.th.ds (SFEm.

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Events and reaction m.ch.nism. during th. synth.sis of an AI2O3-TiB2 nanocom.osite via h.gh.energy ball m.lling

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Frontiers of Ch.m.cal Science and Engineering 2013年第2期7卷 123-129页

作者： m. ABDELLAh. m. ZAKERI h. BAh.ANPOUR m.terials Engineering Departm.nt Islamic Azad University Saveh Branch Saveh Iran Ceram.c Departm.nt Materials and Energy Research Center Tehran 31787/316 Iran Ch.m.cal engineering and m.terials Science Departm.nt University of California Davis CA 95616 USA

An AI2O3-TiB2 nanocom.osite was success- fully synth.sized by th. h.gh.energy ball m.lling of A1, B2O3 and TiO2. Th. structures of th. powdered particles form.d at different m.lling tim.s were evaluated by X-ray diffraction （XRD）, scanning electron m.croscopy （SEm. and transm.ssion electron m.croscopy （TEm.. Th.rm.- dynam.c calculations sh.wed th.t th. com.osite form.d in two steps via h.gh.y exoth.rm.c m.ch.nically induced self-sustaining reactions （m.Rs）. Th. com.osite started to form.at m.lling tim.s of 9-10 h.but th. reaction was not com.lete. Th. rem.ining starting m.terials were consum.d by increasing th. m.lling tim. to 15 h. Th. XRD patterns of th. annealed powders sh.wed th.t alum.num.borate is one of th. interm.diate products and th.t it is consum.d at h.gh.r tem.eratures. h.at treatm.nt of th. 6-h.m.lled sam.le at l l00℃ led to a com.lete form.tion of th. com.osite. Increasing th. m.lling tim. to 15 h.led to a refining of th. crystallite sizes. A nanocom.osite powder with.a m.an crystallite size of 35-40 nm.was obtained after m.lling for 15 h.

关键词： ball m.lling nanocom.osite AI2O3 TiB2

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Th. Ph.ton Polarization Param.ter of 2h.n, γ）3h.reaction with.Inclusion of th. Electric Quadrupole Contribution

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Ch.nese Ph.sics Letters 2014年第9期31卷 32-35页

作者： h. Sadegh. m. m.savi-Kh.nsari Departm.nt of Ph.sics Faculty of Science Arak University Arak 8349-8-38156 Iran

We use effective field th.ory （EFT） for th. calculation of neutron-deuteron radiative capture at very low energies. We present h.re th. use of EFT to calculate a low-energy ph.to-nuclear observable in th.ee-body system., th. ph.ton polarization param.ter and and fore-aft asym.etry at th.rm.l neutron energies up to next-to-next to leading order （N2 LO）, with.inclasion of th. electric quadrupole contribution. Th. ph.ton polarization param.ter in total is found to be Rc = -0.421±0.003 and is in good agreem.nt with.th. oth.r m.dern th.oretical calculations based on m.dern nucleon-nucleon potentials. In com.arison with.our previous work, a satisfactory agreem.nt with.th. available experim.ntal data is found by inclusion of th. electric quadrupole contribution.

关键词： Polarization

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Determ.nation of interface states and th.ir tim. constant for Au/SnO_2 /n-Si (m.S) capacitors using adm.ttance m.asurem.nts

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Ch.nese Ph.sics B 2013年第4期22卷 429-433页

作者： h. m. Baran A. Tataroglu Departm.nt of Ph.sics Faculty of Arts and Sciences Gazi University

Th. frequency dependence of adm.ttance m.asurem.nts （capacitance–voltage （C–V ） and conductance–voltage （G/ω–V ）） of Au/SnO2 /n-Si （m.S） capacitors was investigated by taking into account th. effects of th. interface states （N ss ） and series resistance （Rs ） at room.tem.erature. Adm.ttance m.asurem.nts were carried out in frequency and bias voltage ranges of 1 kh.–1 m.0} and （ 5V）–（＋9V）, respectively. Th. values of N ss and R s were determ.ned by using a conductance m.th.d and estim.ting from.th. adm.ttance m.asurem.nts of th. m.S capacitors. At low frequencies, th. interface states can follow th. AC signal and yield excess capacitance and conductance. In addition, th. parallel conductance （G p /ω） versus log（f） curves at various voltages include a peak due to th. presence of interface states. It is observed th.t th. N ss and th.ir tim. constant （τ） range from.1.23 ×10 12 eV-1 ·cm.2 to 1.47 ×10 12 eV-1 ·cm.2 and from.7.29 ×10-5 s to 1.81 ×10-5s, respectively.

关键词： m.S capacitor adm.ttance m.asurem.nts interface states

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