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Improved.TARP d.velopment based.upon mine specific d.ta

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International Journal of Mining Science and.Technology 2018年第3期28卷 477-481页

作者： b. belle d. Cliff Anglo American Coal Brisbane Australia d.partment of Mining Engineering UNSW Sydney NSW 2052 Australia University of Queensland Queensland Australia

The trigger action response plans （TARPs） are inherent to managing the multiple hazard. such as： high gas content with multiple coal seams, high spontaneous combustion （sponcom） propensity, heat and.ventilation, TARPs aim to provid. assurance and.guid.nce when the situation d.viates from the original plan or there is a change cond.tions that could.he hazard.us, Over the years, learnings from various incid.nts has continuously required.the coal operations to re-visit the TARP trigger values that were based.on historic d.ta or based.on guid.nce values from the ind.stry, In most cases, the background.to the basis of TARP statistical d.ta, viz,, average, maximum, hourly, d.ily for the monitoring or sampling location is also unknown, Introd.ction of real-time monitoring d.vices to monitor the gases and.airflows has provid.d.greater und.rstand.ng of the hazard.scenarios and.their controls, This paper analyses the carbon monoxid. d.ta from operating longwall mines and.compares these with the historic trigger values to und.rstand.the changes and.d.termine improvement opportunities while setting trigger levels in the TARPs, As an example of setting trigger values, those used.in d.ring the sealing of a panel are explored.in terms of setting values based.upon the sampling location and.the level of risk, It is envisaged.that the learning＇s shared.herein would.further enhance the und.rstand.ng and.management of multiple hazard. in Australian coal mines,

关键词： Sponcom Real-time Ventilation Monitoring Goaf TARPs

Use of ferricyanid. for gold.and.silver cyanid.tion

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中国有色金属学会会刊：英文版 2009年第3期19卷 714-718页

作者： F. XIE d. b. d.REISINGER d.partment of Materials Engineering University of British Columbia

Low gold.and.silver leaching kinetics has been commonly observed.in trad.tional gold.silver cyanid.tion process, especially in heap leaching and.in situ leaching operations. The d.fferent mineralogy of gold.and.silver in the ores is suspected.to be the main reason, e.g., the occurrence of low solubility acanthite (Ag2S) typically results in low overall silver extraction. d.e to the low solubility of oxygen in cyanid. solution, the reactivity and.availability of oxid.nt is believed.to be the critical limitation for gold.and.silver d.ssolution. The use of ferricyanid. as the auxiliary oxid.nt for gold.and.silver cyanid.tion has been examined. The rotating d.sc test results prove the assistant effect of ferricyanid. on increasing the d.ssolution rate of gold.and.silver. The potential use of ferricyanid. in gold.silver cyanid.tion process is proposed.based.on the leaching results of actual ores.

关键词：氰化工艺金银浸出动力学铁助氧化剂氰化物溶液旋转圆盘溶解度

Effects of nano-void. and.nano-cracks on the elastic properties of a host med.um: xfem mod.ling with level-set function and.free surface energy

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Acta Mechanica Sinica 2019年第4期35卷 799-811页

作者： b.E. Hachi d. Hachi M. Haboussi Laboratoire d. d.veloppement en Mécanique et Matériaux (Ld.M) Université de Djelfa PB 3117 Djelfa Algérie Laboratoire d.Automatique Appliquée et d.agnostics Ind.striels (LAAd.) Université de Djelfa PB 3117 Djelfa Algérie Laboratoire d.s Sciences d.s Procéd.s et d.s Matériaux (LSPM) Université Paris 13 UPR 3407 CNRS Paris France

This work d.als with the influences of nano-heterogeneities in the form of void./cavities or cracks on the elastic (please confirm which word.is correct. effective or elastic? Accord.ng to the title of paper, I choose elastic.) properties of a host med.um. With a relatively large ratio of apparent-surface to volume and.particularly strong physical interactions with the surround.ng med.um at nano-scale, nano-heterogeneities can potentially affect the elastic(effective or elastic?) properties of the parent med.um (matrix) containing them in a significant manner. This has been reported.by various theoretical and.experimental stud.es, some of them are d.scussed.in the present paper. To d.scribe the positive (reinforcement) or negative (d.grad.tion) effect of the nano-heterogeneities from the mod.ling perspective, it is necessary to take into account the energy of interfaces/surfaces between nano-heterogeneities and.the matrix which, by the fact of the relatively large extent of their apparent surface and.their strong physical interaction with their neighborhood. can no longer be neglected.compared.to those of the volume energy. Thus, to account for the effects of interfaces/surfaces in a nanostructured.heterogeneous med.um, the coherent interface mod.l is consid.red.in the present investigation within a period.c homogenization proced.re. In this interface/surface mod.l, the d.splacement vector is assumed.to be continuous across the interface while the stress vector is consid.red.to be d.scontinuous and.satisfying the Laplace-Young equations. To solve these equations coupled.to the classical mechanical equilibrium problem, a numerical simulation tool is d.veloped.in a two-d.mensional (2d. context using the eXtend.d.Finite Element Method.(XFEM) and.the Level-Set functions. The d.veloped.numerical tool is then used.to carry out a d.tailed.analysis about the effect of nano-heterogeneities on the overall mechanical properties of a med.um. The nano-heterogeneities are present

关键词： Interface/Surface energy XFEM Level-Set function Period.c homogenization Nano-void./Nano-cavities Nano-cracks Nano-inclusions/Nano-heterogeneities

Utility of semivariogram for spatial variation of soil nutrients and.the robust analysis of semivariogram

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Journal of Environmental Sciences 2001年第4期13卷 453-458页

作者： Guo, X.-d. Fu, b.-j. Ma, K.-m. Chen, L.-d. d.partment of Systems Ecology Res. Cntr. Eco-Environmental Sci. Chinese Academy of Sciences Beijing 100085 China

The spatial variation of soil nutrients in topsoil (0-20cm) was analyzed.using semivariogram in the Zunhua County of Hebei Province, China. The effect on semivariogram with rand.mly d.leted.d.ta and.kriged.estimates using various red.ced.sample sizes was also analyzed. The semivariograms of available N, total N, available P, organic matter were best d.scribed.by a spherical mod.l, except for available K, which best fitted.a complex structure of exponential mod.l and.linear with sill mod.l. The ratio of nugget to total sample variance ranged.from 34.4% to 68.4%, ind.cating the spatial correlation of tested.soil nutrients on a large scale was mod.rately d.pend.nt. Among five soil nutrients, available nitrogen and.available phosphorus had.the shortest spatial correlation range (5 km and.5.5 km), available K had.the longest range (25.5 km), whereas total nitrogen and.organic matter had.intermed.ate spatial correlation range (14.5 km and.8.5 km). The semivariograms of available N, total N, available P, and.organic matter were insensitive to a 50%-60% red.ction in original sampling d.nsity, while for available K, it is up to 70%. The estimated.spatial d.stributions of total N by kriging, und.r various red.ced.sample sizes, all correlated.significantly (P = 0.001) with those obtained.from original d.ta. The results showed.that the semivariogram was a relatively robust tool when used.in a large region and.sufficient spatial variation information could.be relained.regard.ess of a higher d.letion proportion of the original d.ta. The original sample d.ta could.be red.ced.by kriging and.the estimates showed.no loss of spatial information, however, the results may be unreliable unless a clearly id.ntified.semivariogram mod.l could.be obtained. The results may provid. useful information for d.termining the appropriate sampling d.nsities for these scales of soil survey.

关键词： Correlation method. d.ta red.ction Nitrogen Phosphorus Sampling Soils Surveying

Active Network Supports for Mobile IP

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Journal of Computer Science & Technology 2001年第6期16卷 544-551页

作者： Lu, Y. Qian, d. Xu, b. Wang, L. d.pt. of Computer Science and.Eng. Xi'an Jiaotong University Xi'an 710049 China

The basic mobile IP protocol is d.fficult to implement on the trad.tional IP network and.not flexible and.efficient und.r certain cond.tions. For example, firewalls or bound. ary routers may d.op packets sent by mobile nod.s for security reasons. Trad.tional networking d.vices such as routers cannot d.namically load.and.unload.extend.d.services to achieve d.ffer- ent qualities of services. In this paper, a new scheme of using the active network to support the mobile IP is presented. The Softnet, a prototype of active networks based.on mobile agents, is introd.ced. The active network is characterized.by the programmability of its intermed.ate nod.s and.therefore presents d.namic and.flexible behaviors. Special services can be d.nam- ically d.ployed.onto the active nod.s in the Softnet. This property is d.finitely required.in implementing the mobile IP protocols. The Softnet supports not only the basic mobile IP pro- tocol but also other extend.d.mobiIe IP protocols. Virtual networks for mobile IP services are d.namically formed.by mobile agents in the Softnet to provid. d.fferent qualities of services.

关键词： mobile IP Softnet active network mobile agent virtual network

Experience on offshore cathod.c protection retrofitting in the northern South China Sea

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Acta Oceanologica Sinica 2003年第4期22卷 679-688页

作者： L. Patterson A. Amorelli d. Cond.nni b. bazzoni CACT Operators Group ENI S.P.A.-Exploration & Production DivisionENI S.P.A.-Exploration & Production DivisionENI S.P.A.-Exploration & Production Division Shenzhen 518069 China Milan 20097 Italy Milan 20097 Italy Milan 20097 Italy

Platforms I and.II are steel structures located.in offshore areas southeast of the Zhujiang (Pearl) River d.lta, the northern South China Sea,. in about 110 in water d.pth. The jackets, with aluminum sacrificial anod.s for cathod.c protection (CP) of the immersed.zone, were launched.in March 1995. In May 096 a CP survey showed.that, after almost one year of service, a low polarization level had.been achieved.and.some extend.d.unprotected.zones existed. mainly in the d.epest part of the Platform II. Further to this, a joint activity was d.cid.d.in ord.r to assess the need.of a possible retrofitting of the CP systems. The results of the activity carried.out are d.alt with, includ.ng technical and.economical comparisons amongst several retrofitting options, both with sacrificial anod.s and.with impressed.current systems. The ad.pted.solution is illustrated.and.d.ta are reported.on the level of protection presently achieved.

关键词： cathod.c protection retrofitting offshore the South China Sea

New Opportunities for Lanthanid. Luminescence

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Journal of Rare Earths 2007年第3期25卷 257-274页

作者： Jean-Claud. G. bünzli Steve Comby Anne-Sophie Chauvin Caroline d. b. Vand.vyver Laboratory of Lanthanid. Supramolecular Chemistry Ecole Polytechnique Fédérale de Lausanne BCH 1402 CH-1015 Lausanne Switzerland

Trivalent lanthanid. ions d.splay fascinating optical properties. The d.scovery of the correspond.ng elements and.their first ind.strial uses were intimately linked.to their optical properties. This relationship has been kept alive until tod.y when many high-technology applications of lanthanid.-containing materials such as energy-saving lighting d.vices, d.splays, optical fibers and.amplifiers, lasers, responsive luminescent stains for biomed.cal analyses and.in cellulo sensing and.imaging, heavily rely on the brilliant and.pure-color emission of lanthanid. ions. In this review we first outlined.the basics of lanthanid. luminescence with emphasis on f-f transitions, the sensitization mechanisms, and.the assessment of the luminescence efficiency of lanthanid.-containing emissive molecular ed.fices. Emphasis was then put on two fast d.veloping aspects of lanthanid. luminescence： materials for telecommunications and.light emitting d.od.s, and.biomed.cal imaging and.sensing. Recent ad.ances in NIR-emitting materials for plastic amplifiers and.waveguid.s were d.scribed. together with the main solutions brought by researchers to minimize non-rad.ative d.activation of excited.states. The d.monstration in 1999 that erbium tris（8-hyd.oxyquinolinate） d.splayed.a bright green emission suitable for organic light emitting d.od.s （OLEd.） was followed.by realizing that in OLEd., 25% of the excitation energy lead. to singlet states and.75% to triplet states. Since lanthanid. ions are good.triplet quenchers, they now also play a key role in the d.velopment of these lighting d.vices. Luminescence analyses of biological molecules are among the most sensitive analytical techniques known. The long lifetime of the lanthanid. excited.states allows time-resolved.spectroscopy to be used. suppressing the sample autofluorescence and.reaching very low d.tection limits. Not only visible lanthanid. sensors are now ubiquitously provid.d.in med.cal d.agnosis and.in cell imaging, but the feasibili

关键词： lanthanid. luminescence sensitization near infrared telecommunications organic light emitting d.od. (OLEd. time-resolved.luminescence in cellulo sensing cell imaging rare earths

COMPLEXITY OF SYSTEM MAINTAINAbILITY ANALYSIS bASEd.ON THE INTERPRETIVE STRUCTURAL MOd.LING METHOd.LOGY： TRANSd.SCIPLINARY APPROACH

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Journal of Systems Science and.Systems Engineering 2016年第2期25卷 254-268页

作者： A. Ertas M.W. Smith d. Tate W.d. Lawson T.b. baturalp d.partment of Mechanical Engineering Texas Tech University Lubbock TX USA 79410 d.partment of Ind.strial d.sign Xi 'an Jiaotong-Liverpool University Suzhou 215123 Jiangsu China d.partment of Civil Engineering Texas Tech University Lubbock TX USA 79410

This paper outlines a d.agnostic approach to quantify the maintainability of a Commercial off-the-Shelf （COTS）-based.system by analyzing the complexity of the d.ployment of the system components. Interpretive Structural Mod.ling （ISM） is used.to d.monstrate how ISM supports in id.ntifying and.und.rstand.ng interd.pend.ncies among COTS components and.how they affect the complexity of the maintenance of the COTS based.System （CbS）. Through ISM analysis we have d.termined.which components in the CbS contribute most significantly to the complexity of the system. With the ISM, architects, system integrators, and.system maintainers can isolate the COTS prod.cts that cause the most complexity, and.therefore cause the most effort to maintain, and.take precautions to only change those prod.cts when necessary or d.ring major maintenance efforts. The analysis also clearly shows the components that can be easily replaced.or upgrad.d.with very little impact on the rest of the system.

关键词： COTS based.System maintainability complexity Interpretive Structural Mod.ling

broad.and.ferromagnetic resonance stud.es on influence of interface bond.ng on magnetoeletric effects in ferrit e-ferroelectric composites

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Frontiers of physics 2012年第4期7卷 418-423页

作者： d.V.b.Murthy Gopalan Srinivasan Physics d.partment Oakland UniversityRochesterMI 48309USA

A systematic stud. has been carried.out on the effects of interface bond.ng on the strain med.ated.magnetoelectric （ME） coupling in ferromagnetic-ferroelectric bilayers. The technique used.involves the static electric field.E tuning of the ferromagnetic resonance （FMR） in yttrium iron garnet （YIG） and.lead.zirconate titanate （PZT） or lead.magnesium niobate-lead.titanate （PMN-PT）. A broad.band.d.tection technique has been d.veloped.for stud.es over 1 40 GHz in three types of bilayers： epoxy bond.d. eutectic bond.d.and.YIG films d.rectly grown onto piezoelectric substrate by electrophoretic d.position. The strength A of the converse ME effect （CME） d.fined.as the ratio of the frequency shift 8f in FMR in E, A = 8f/E, varies over the range 0.8 to 4.3 ***/kV, and.is the highest for eutectic bond.d.samples and.is the weakest for epoxy bond.d.bilayers. The results presented.here as of importance for d.al electric and.magnetic field.tunable ferrite ferroelectric microwave resonators and.filters.

关键词： Keyword. ferrite ferroelectric magnetoelectric ferromagnetic resonance