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par.icuology 2017年第1期15卷 83-91页

作者： G. Setia S.S. Mallick r. pan p.W. Wypych Depar.ment of Mechanical Engineer.ng Thapar University Patiala Punjab 147004 India Fujian Longking Co. Ltd. 81 Lingyuan Road Longyan City Fujian 361000 China Faculty of Engineer.ng University ofWollongong WoUongong NSW2522 Australia

r.sults ar. pr.sented of an ongoing investigation into modeling fr.ction in fiuidized dense-phase pneumatic tr.nspor. of bulk solids. Many popular.modeling methods of the solids fr.ction use the dimen- sionless solids loading r.tio and Fr.ude number. When evaluated under.pr.per.scale-up conditions of pipe diameter.and length, many of these models have r.sulted in significant inaccur.cy. A technique for.modeling solids fr.ction has been developed using a new combination of dimensionless number., volu- metr.c loading r.tio and the r.tio of par.icle fr.e settling velocity to super.icial conveying air.velocity, to r.place the solids loading r.tio and Fr.ude number. The models developed using the new for.alism wer. evaluated for.accur.cy and stability under.significant scale-up conditions for.four.differ.nt pr.d- ucts conveyed thr.ugh four.differ.nt test r.gs （subject to diameter.and length scale-up conditions）. The new model consider.bly impr.ves pr.dictions compar.d with those obtained using the existing model, especially in the dense-phase r.gion. Wher.as the latter.yields absolute aver.ge r.lative er.or. var.ing between 10% and 86%, the for.er.yielded r.sults with er.or. fr.m 4% to 20% for.a wide r.nge of scale-up conditions. This r.pr.sents a mor. r.liable and nar.ower.r.nge of pr.diction that is suitable for.industr.al scale-up r.quir.ments.

关键词： Fluidized dense-phase pneumatic tr.nspor. Solids fr.ction factor.Scale-up Volumetr.c loading r.tio Dimensionless velocity

Human-Like r.bot Sensing Mediated by Body Heat

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Jour.al of Bionic Engineer.ng 2014年第1期11卷 82-89页

作者： r. Andr.w r.ssell Depar.ment of Electr.cal and Computer.Systems Engineer.ng Monash University Clayton VIC 3800 Australia

This paper.pr.sents a novel r.botic sensor.system that can monitor.volatile chemicals and air.low. The system is modelled on char.cter.stics of the human body that ar. thought to have a significant influence on the human odour.and air.low senses. In par.icular. the effect of buoyant air.low due to body heat acts to gather.volatile chemicals over.lar.e ar.as of the human body and car.y them to the nose. It is postulated that this effect incr.ases the r.ceptive ar.a for.human olfaction. In addition, the inter.ction between r.sing air.heated by the body and exter.al air.low pr.duces a temper.tur. distr.bution about head height that can be used to infer.air.low dir.ction and magnitude. A heated sensor.system was constr.cted to investigate these effects and the r.sulting sensor.was mounted on a mobile r.bot. The design of the sensor.system is descr.bed. r.sults ar. pr.sented which demonstr.te its ability to measur. air.low dir.ction and detect chemical signals over.a wider.r.ceptive field compar.d with an unheated sensor.

关键词： sensing volatile chemicals sensing air.low human body heat biomimetic r.bots

Ser.iceability analysis of deep under.r.und openings dr.ven in jointed-r.ck

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Inter.ational Jour.al of Mining Science and Technology 2017年第6期27卷 1019-1024页

作者： Abdellah Wael r. Mining and Metallur.ical Engineer.ng Depar.ment Faculty of Engineering University of Assiut Assiut 71515 Egypt

The per.or.ance of under.r.und excavations is inevitably influenced by r.ck mass char.cter.stics, pr.sence of joints and their.geometr.cal pr.per.ies, depth below sur.ace and state of in-situ str.ss field. The objective of this paper.is to investigate the behaviour.of deep under.r.und tunnel opening existed between two bedding planes, Such planes weaken the str.ngth of r.ck mass and may cause r.ck slippage/r.tation along them. Ther.for., the state of str.ss-displacement, after.tunnel opening has been intr.duced, is examined using two-dimensional elasto-plastic finite-elements code, r.^(2D). The r.sults indicate that, ther. is significant dr.p in the nor.al str.ss along joints over.tunnel opening; slip occur. due to r.ver.al in the dir.ction of shear.str.ss(e.g., inwar. shear.displacement is pr.duced) and ther. is discontinuity in the str.ngth contour. of r.ck sur.ounding tunnel after.they have been inter.ected by bedding planes.

关键词： State of str.ss-displacement Bedding planes Tunnel per.or.ance Depth of failur. zones Stability analysis

r.NDOM　CHAr.CTEr.STICS　OF　FLOW　FLUCTUATING　pr.SSUr.　AND　DYNAMIC　r.SpONSE　ON　THE　SHAFT　SpILLWAY

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Jour.al of Hydr.dynamics 1995年第2期7卷 28-34页

作者： Cui Li(Dalian Univer.ity of Technology, Dalian 116023, p. r. China) Dalian Univ of Technology Dalian China

The flow down a shaft spillway, connected with tunnel, r.sults in nonsymmetr.c vor.ex ar.und the axis of the shaft. The gr.ater.the nonsymmetr., the gr.ater.the pr.ssur. fluctuation and r.ndom vibr.tion of *** paper.deals with an attempt to deter.ine the fluctuating pr.ssur. char.cter.stics in the shaft. Stochastic theor. and r.ndom time ser.es ar. employed to analyse the sample function x(t) , its x(t) and x(t), and their.cor.elations:The moments of the spectr. ar. obtained:The fluctuating pr.ssur. char.cter.stics ar. r.lated to the non-symmetr.c inlet vor.ex. The r.lation between the point pr.ssur. spectr. and fluctuating pr.ssur.s on the shaft wall ar. indicated and *** paper.gas fur.her.into the simulated test on the fr.med over.flow tower.and puts for.ar. an effective pr.posed way. Besides the calculation in fr.quency domain, computation in time domain is also ueed to analyse the same str.ctur.. The vibr.tion sour.e and the method to r.move it ar. found out.

关键词： shaft spillway dynamic r.sponse r.ndom char.cter.stics

r.moval of Heavy Metals fr.m Wastewater.by Using the Mor.nga Oleifer. pr.ss Cake

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Removal of Heavy Metals from Wastewater by Using the Moringa...

作者： Ali asad 西南科技大学

学位级别：硕士

曾经地球上的水非常的丰富,湖里的水清澈见底,河里的鱼儿种类丰富自由自在,这样的水可以供人们直接饮用也不会受到危害。但是,随着人口的增长和工业的发展,水质因为人类的开发利用而下降。废水污染的主要来源有两个:工业废水和城市生活... 详细信息

曾经地球上的水非常的丰富,湖里的水清澈见底,河里的鱼儿种类丰富自由自在,这样的水可以供人们直接饮用也不会受到危害。但是,随着人口的增长和工业的发展,水质因为人类的开发利用而下降。废水污染的主要来源有两个:工业废水和城市生活污水。工业废水包括污水排放和工业用水,例如采矿和制造业会产生大量废水,它们产生的大量废水排放到附近的河流,对珍贵的水资源造成污染。本次实验通过研究成熟辣木种子和干辣木种子中提取的辣木粉对水质的影响。辣木籽是一种廉价的局部混凝剂,本试验收集的废水在中国四川绵阳的西南科技大学校园内取得。分别制备了不同浓度2mg/L,4mg/L和6mg/L的镉和铬溶液作为校准曲线。加入一滴硝酸来还原溶液;在经过MOpC处理后,重金属浓度大幅度降低。铬和镉(2 mg/L)的去除率分别为92.85%和89.84%,铬和镉(4 mg/L)的去除率分别为82.30%和81.23%,铬和镉(6 mg/L)的去除率分别为81.53%和79.52%。废水的浑浊度为47.7 NTU,在MOpC溶液中加入MOpC后,其浑浊度降至最低9.7 NTU,最优值为20000 ppm。浊度显著增加了毛胚蛋白c的浓度,从而改变了残余浊度。浊度去除率最高为79.6%。经不同浓度的MOpC处理后,p H值在8.13.13之间波动,差异无统计学意义。当最佳浓度为15000ppm时,废水COD从236.3mg/L降至98.03 mg/L,随着MOpC溶液浓度的增加,COD值略有增加。最大COD去除率为58.51%。辣木籽饼是一种有效的重金属去除剂天然混凝剂,具有降低水中p H、浊度、EC等理化污染物的能力,是一种廉价的处理污水的材料。人们想要得到更多的安全饮用水,就可以通过这种方式来处理水,使废水得到净化,除了其它多种处理废水的方法之外,用辣木籽饼也是一种很好的处理水的方法。

关键词：辣木废水处理重金属浑浊度

Unr.gulated emissions fr.m a diesel engine equipped with vanadium-based ur.a-SCr.catalyst

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Jour.al of Envir.nmental Sciences 2010年第4期22卷 575-581页

作者： Lei Jiang Yunshan Ge asad Naeem Shah Chao He Zhihua Liu School of Mechanical Engineer.ng Beijing Institute of Technology Beijing 100081 China. Depar.ment of Mechanical Engineer.ng University of Engineering and Technology Lahore 54000 Pakistan School of Tr.nspor.ation Machinery and Civil Engineering Southwest Forestry College Kunming 650224 China

The pr.sent wor. is aimed at the study of number.size distr.bution of par.icles, volatile or.anic compounds （VOCs）, and car.onyl compounds （CC） or.car.onyls emitted fr.m a 4-cylinder.tur.ochar.ed diesel engine equipped with a vanadium-based ur.a selective catalytic r.duction catalyst. The engine was r.n on an electr.c dynamometer.in accor.ance with the Eur.pean steady-state cycle. pollutants wer. analyzed using an electr.c low pr.ssur. impactor. a gas chr.matogr.ph/mass spectr.meter. and a high per.or.ance liquid chr.matogr.phy system for.the number.size distr.bution of par.icles, VOCs, and CC emissions, r.spectively. Exper.mental r.sults r.vealed that total number.of par.icles wer. decr.ased, and their.number.size distr.butions wer. moved fr.m smaller.sizes to lar.er.sizes in the pr.sence of the catalyst. The VOCs wer. gr.atly r.duced downstr.am of the catalyst. Ther. was a str.ng cor.elation between the conver.ion of styr.ne and ethyl benzene. The conver.ion r.te of benzene incr.ased with incr.ase of catalyst temper.tur.. For.aldehyde, acetaldehyde, acr.lein and acetone wer. significantly r.duced, r.sulting in a r.mar.able abatement in car.onyls with the use of the vanadium-based ur.a-SCr.system.

关键词： diesel engine selective catalytic r.duction par.iculate volatile or.anic compounds car.onyls

pulsatile blood flow thr.ugh stenosed ar.er. with axial tr.nslation

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Inter.ational Jour.al of Biomathematics 2015年第3期8卷 1-21页

作者： Mukesh Kumar.Shar.a p. r. Shar.a Vinay Nasha Depar.ment of MathematicsGur. Jambheshwar.Univer.ity of Science and Technology Hisar.125001 Haryana India Depar.ment of MathematicsUniver.ity of r.jasthan Jaipur 302029 Rajasthan India

The study of pulsatile blood flow thr.ugh axisymmetr.c stenosed ar.er. subject to an axial tr.nslation has been attempted with hematocr.t concentr.tion-dependent blood viscosity. The hear. contr.ction and subsequent r.laxation gener.te per.odic pr.ssur. gr.dient in blood flow and tr.nslation in the ar.er. can be r.pr.sented by Four.er.ser.es. Numer.cal data r.quir.d for.computing Four.er.har.onics for.the pr.ssur. gr.dient and acceler.tion in the ar.er. has been simulated fr.m pr.ssur. wavefor. gr.ph and biplanar.angiogr.m. Velocity field has been obtained by solving gover.ing equation using var.ational r.tz method. The hemodynamic indicator. WSS, AWSS, OSI, r.T ar. der.ved and computed numer.cally. The effects of thickness of stenosis, and hematocr.t concentr.tion index on these indicator. ar. computed and analyzed thr.ugh gr.phs.

关键词： Stenosis hematocr.t pulsatile WSS oscillator. shear.index r.lative r.sidence time

Str.ng-coupling super.onductivity induced by calcium inter.alation in bilayer.tr.nsition-metal dichalcogenides

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Fr.ntier. of physics 2018年第2期13卷 185-191页

作者： r. Szczesniak A. p. Dur.jski M. W. Jar.sik Institute of physics Czestochowa University of Technology Ave. Armii Krajowej 19 42-200 Czestochowa Poland

We theor.tically investigate the possibility of achieving a super.onducting state in tr.nsition-metal dichalcogenide bilayer. thr.ugh inter.alation, a pr.cess pr.viously and widely used to achieve metal- lization and super.onducting states in novel super.onductor.. For.the Ca-inter.alated bilayer. MoSs and WS2, we find that the super.onducting state is char.cter.zed by an electr.n-phonon coupling constant lar.er.than 1.0 and a super.onducting cr.tical temper.tur. of 13.3 and 9.3 K, r.spectively. These r.sults ar. super.or.to other.pr.dicted or.exper.mentally obser.ed two-dimensional conventional ＇super.onductor. and suggest that the investigated mater.als may be good candidates for.nanoscale su- per.onductor.. Mor. inter.stingly, we pr.ved that the obtained ther.odynamic pr.per.ies go beyond the pr.dictions of the mean-field Bar.een-Cooper.Schr.effer.appr.ximation and that the calculations conducted within the fr.mewor. of the str.ng-coupling Eliashber. theor. should be tr.ated as those that yield quantitative r.sults.

关键词： 2D super.onductivity effect of inter.alation tr.nsition-metal dichalcogenides,ther.odynamic pr.per.ies

A r.action-diffusion model of for.st boundar. with seed dynamics

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Inter.ational Jour.al of Biomathematics 2015年第3期8卷 109-123页

作者： J. r.jasingh r. Mur.gesu p. Syed Shabudeen Depar.ment of Mathematics Kumaraguru College Technology Coimbatore 641006 Tamilnadu India Depar.ment of MathematicsSr. r.makr.shna Mission Vidyalya College of Ar.s and Science Coimbator. 641020 Tamilnadu India Depar.ment of Envir.nmental Science and Chemistr. Kumar.gur. College Technology Coimbator. 641006 Tamilnadu India

The density of for.st cover.based upon r.action diffusion model for.mono-species of two age classes with seed dynamics is to be attempted. The pr.vailing densities of young, old species and air.or.e seedlings ar. r.solved by homotopy per.ur.ation method which is applied in r.action diffusion model. This model is utilized to ver.fy the effect of the density of for.st cover.with the following var.ables namely seed r.pr.duction, seed deposition, seed establishment r.tes, coefficients of aging of old tr.e and coefficients of mor.ality on the space var.able.

关键词： For.st boundar. dynamics age-str.ctur.d for.st model homotopy per.ur.ation method.

Or.anic Ligand,Competing Cation,and pH Effects on Dissolution of Zinc in Soils

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pedospher. 2008年第1期18卷 92-101页

作者： p. LOMBNIES A. C. CHANG B. r. SINGH Depar.ment of plant and Envir.nmental Sciences P. O. Box 5003 Norwegian University of Life Sciences N-1432 Aas (Norway) Depar.r.ent of Envir.nmental Sciences University of California Riverside CA 92521 (USA)

A ser.es of exper.ments wer. conducted to examine the inter.ctive effects of an or.anic ligand,a competing cation, and pH on the dissolution of zinc (Zn) fr.m thr.e Califor.ia soils,Maymen sandy loam,Mer.ed clay,and Yolo clay *** concentr.tions of soluble Zn of the thr.e soils wer. low in a backgr.und solution of Ca(NO3)*** acid,a common or.anic ligand found in the r.izospher.,was effective in mobilizing Zn in these soils;its pr.sence enhanced the concentr.tion of Zn in soil solution by citr.te for.ing a complex with *** ability of Zn to for. a complex with citr.c acid in the soil solution was dependent on the concentr.tion of citr.c acid,pH,and the concentr.tion of the competing cation Ca^(2+).The pH of the soil solution deter.ined the extent of desor.tion of Zn in solid phase in the pr.sence of citr.c *** amounts of Zn r.leased fr.m the solid phase wer. pr.por.ional to the concentr.tion of citr.c acid and inver.ely pr.por.ional to the concentr.tion of Ca(NO3)2 backgr.und solution,which supplied the competing cation Ca^(2+) for.the for.ation of a complex with *** the soil suspension was spiked with Zn,the adsor.tion of Zn by the soils was r.tar.ed by citr.c acid via the for.ation of the soluble Zn-citr.te *** dissolution of Zn in the pr.sence of citr.c acid was pH dependent in both adsor.tion and desor.tion pr.cesses.

关键词： competing cation or.anic ligand pH soils Zn dissolution