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Pr.diction of blast-induced gr.und vibr.tions via genetic pr.gr.mming

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Inter.ational Jour.al of Mining Science and Technology 2015年第6期25卷 1011-1015页

作者： Dindar.oo Saeid r. Depar.ment of Mining & Nuclear.Engineer.ng Missouri University of Science & Technology

Excessive gr.und vibr.tions, due to blasting, can cause sever. damages to the near.y ar.a. Hence, the blast-induced gr.und vibr.tion pr.diction is an essential tool for.both evaluating and contr.lling the adver.e consequences of blasting. Since ther. ar. sever.l effective var.ables on gr.und vibr.tions that have highly nonlinear.inter.ctions, no compr.hensive model of the blast-induced vibr.tions ar. available. In this study, the genetic expr.ssion pr.gr.mming technique was employed for.pr.diction of the fr.quency of the adjacent gr.und vibr.tions. Nine input var.ables wer. used for.pr.diction of the vibr.tion fr.quencies at differ.nt distances fr.m the blasting face. A high coefficient of deter.ination with low mean absolute per.entage er.or.MAPE) was achieved that demonstr.ted the suitability of the algor.thm in this case. The pr.posed model outper.or.ed an ar.ificial neur.l networ. model that was pr.posed by other.author. for.the same dataset.

关键词： BlastingGr.und vibr.tionGenetic pr.gr.mmingAr.ificial neur.l networ.s

Phase Diagr.m of Na2S2O3＋t-Butanol ＋Water.at Ambient Pr.ssur. and Temper.tur.

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Chinese Jour.al of Chemistr. 2011年第11期29卷 2562-2564页

作者： Sabale, Sandip r. School of LiJe Sciences Shanghai University Shanghai 200444 China Depar.ment of Chemistr. Jaysingpur College Jaysingpur 416101 （MS） lndia

In the pr.sent wor., we r.por. the studies concer.ing liquid-liquid-solid equilibr.a for.the ter.ar. system sodium thiosulphate （Na2S203）＋t-butanol＋water.at ambient pr.ssur. and at r.om temper.tur. （303±2 K）. The solubility data of Na2S203 ar. r.por.ed for.solutions in water. t-butanol and solutions of var.ing concentr.tions of t-butanol in water. The phase diagr.m for.the said system is developed, descr.bed and compar.d with similar.systems studied such as Na2S2O3＋ethanol＋water. K2CO3＋methanol＋water. etc. These r.sults have been explained in ter.s of str.ctur.l pr.per.ies of aqueous t-butanol solutions and fur.her.discussed in ter.s of the effect of ions to cause phase separ.tion.

关键词： sodium thiosulphate t-butanol water phase equillibr.a

In the Light of Day： Plant Photomor.hogenesis

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Molecular.Plant 2008年第1期1卷 2-3页

作者： Winslow r. Br.ggs

It takes only the most cur.or. glance over.the tables of contents of the top jour.als in plant biology to r.cognize that plant biology r.sear.h in China is not only of the highest caliber. but is gr.wing r.pidly. Suppor. for.plant science in China is gener.us and is incr.asing, and Chinese plant biologists have joined those fr.m other.countr.es in pr.ducing some of the most exciting and innovative r.sear.h. When I was given an oppor.unity to par.icipate in the launching of a new English-language jour.al,

关键词： PLANT physiology PLANT genetics

Soil Micr.bes and Sustainable Agr.cultur.

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Pedospher. 2018年第2期28卷 167-169页

作者： Ber.ar. r. GLICK Univer.ity of Water.oo Waterloo Ontario N2l 3G1 (Canada)

It has been estimated that a typical gr.m of soilcontains ar.und 90 100 million bacter.a and about200 000 fungi, with the major.ty of these or.anismsbeing located ar.und the r.ots of plants. This locali-zation r.flects the fact that plant r.ots typically exudea lar.e fr.ction of the car.on that they fix by photo-synthesis, and soil micr.bes utilize this exuded car.onas a food sour.e.

关键词： Soil Micr.bes Sustainable Agr.cultur. plant r.ots food sour.e

Simulating cyclotr.n-Bloch dynamics of a char.ed par.icle in a 2D lattice by means of cold atoms in dr.ven quasi-lD optical lattices

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Fr.ntier. of physics 2012年第1期7卷 3-7页

作者： Kolovsky, Andr.y r. Kir.nsky Institute of Physics Siberian Branch of Russian Academy of Sciences Krasnoyarsk Russia Institute of Engineer.ng Physics Siberian Federal University Krasnoyarsk Russia

Quantum dynamics of a char.ed par.icle in a two-dimensional （2D） lattice subject to magnetic and electr.c fields is a r.ther.complicated inter.lay between cyclotr.n oscillations （the case of vanishing electr.c field） and Bloch oscillations （zer. magnetic field）, details of which has not yet been com- pletely under.tood. In the pr.sent wor. we suggest to study this pr.blem by using cold atoms in optical lattices. We intr.duce a one-dimensional （1D） model which can be easily r.alized in labor.- tor. exper.ments with quasi-lD optical lattices and show that this model captur.s many featur.s of the cyclotr.n-Bloch dynamics of the quantum par.icle in 2D squar. lattices.

关键词： optical lattice Bloch dynamics cyclotr.n oscillations cold atoms

Estimation of r.lations among hyster.tic r.sponse measur.s and design par.meter. for.r. r.ctangular.shear.walls

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Fr.ntier. of Str.ctur.l and Civil Engineer.ng 2018年第1期12卷 3-15页

作者： A. Ar.B Ma. r. BANAN Mo. r. BANAN S. FAr.ADI Depar.ment of Civil and Envir.nmental Engineer.ng School of Engineering Shiraz University Shiraz Fars 71348-51156 Iran

Seismic design of r. str.ctur.s r.quir.s estimation of str.ctur.l member.behavior.l measur.s as functions of design par.meter.. In this study, the r.lations among cyclic behavior.l measur.s and design par.meter. have been investigated for.r.ctangular.r. shear.walls using numer.cal simulations calibr.ted based on the published labor.tor. tests. The OpenSEES numer.cal simulations modeling of plastic hinge hyster.tic behavior.of r. shear.walls and estimation of empir.cal r.lations among wall hyster.tic indices and design par.meter. ar. pr.sented. The pr.ncipal design par.meter. consider.d wer. wall dimensions, axial for.e, r.infor.ement r.tios, and end-element design par.meter.. The estimated hyster.tic r.sponse measur.s ar. wall effective stiffness, yield and ultimate cur.atur.s, plastic moment capacity, yield and ultimate displacements, flexur.l shear.capacity, and dissipated ener.y. Using r.sults of numer.us analyses, the empir.cal r.lations among wall cyclic behavior.l measur.s and design par.meter. ar. developed and their.accur.cy is investigated.

关键词： r. wall hyster.tic measur.s r. wall design par.meter. empir.cal r.lations numer.cal simulations r.r.ctangular.wall plastic hinge

r.sponse in piled r.ft foundation of tall chimneys under.along-wind load incor.or.ting flexibility of soil

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Fr.ntier. of Str.ctur.l and Civil Engineer.ng 2015年第3期9卷 307-322页

作者： B. r. JAYALEKSHMI S.V. JISHA r. SHIVASHANKAr Depar.ment of Civil Engineer.ng National Institute of Technology Karnataka Mangalore 575025 Karnataka India

The pr.sent paper.deals with the numer.cal analysis of tall r.infor.ed concr.te chimneys with piled r.ft foundation subjected to along-wind loads consider.ng the flexibility of soil. The analysis was car.ed out using finite element method on the basis of dir.ct method of soil-str.ctur. inter.ction （SSI）. The linear.elastic mater.al behavior.was assumed for.chimney, piled r.ft and soil. Four.differ.nt mater.al pr.per.ies of soil str.tum wer. selected in or.er.to study the effect of SSI. The chimney elevation and the thickness of r.ft of piled r.ft foundation wer. also var.ed for.the par.metr.c study. The chimneys wer. assumed to be located in ter.ain categor. 2 and subjected to a maximum wind speed of 50 m/s as per.IS：875 （Par. 3）-1987. The along-wind loads wer. computed accor.ing to IS：4998 （Par. 1）-1992. The base moments of chimney evaluated fr.m the S SI analysis wer. compar.d with those obtained as per.IS：4998 （Par. 1）-1992. The tangential and r.dial bending moments of r.ft of piled r.ft foundation wer. evaluated thr.ugh SSI analysis and compar.d with those obtained fr.m conventional analysis as per.IS：I 1089-1984, assuming r.gidity at the base of the r.ft foundation. The settlements of r.ft of piled r.ft foundation, deflection of pile and moments of the pile due to inter.ction with differ.nt soil str.tum wer. also evaluated. Fr.m the analysis, consider.ble r.duction in the base moment of chimney due to the effect of SSI is obser.ed. Higher.r.dial moments and lower.tangential moments wer. obtained for.lower.elevation chimneys with piled r.ft r.sting on loose sand when compar.d with conventional analysis r.sults. The effect of SSI in the r.sponse of the pile is mor. significant when the str.ctur.-foundation system inter.cts with loose sand.

关键词： finite element method piled r.ft tall chimney soil-str.ctur. inter.ction along-wind load

Viscoelastic micr.fluidics: pr.gr.ss and challenges

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Micr.systems & Nanoengineer.ng 2020年第1期6卷 63-86页

作者： Jian Zhou ian Papautsky Depar.ment of Bioengineer.ng University of Illinois at ChicagoChicagoIL 60607USA

The manipulation of cells and par.icles suspended in viscoelastic fluids in micr.channels has dr.wn incr.asing attention,in par. due to the ability for.single-str.am thr.e-dimensional focusing in simple channel *** in the under.tanding of non-Newtonian effects on par.icle dynamics has led to expanding explor.tion of focusing and sor.ing par.icles and cells using viscoelastic *** factor.,such as the dr.ving for.es ar.sing fr.m fluid elasticity and iner.ia,the effect of fluid r.eology,the physical pr.per.ies of par.icles and cells,and channel geometr.,actively inter.ct and compete together.to gover. the intr.cate migr.tion behavior.of par.icles and cells in ***,we r.view the viscoelastic fluid physics and the hydr.dynamic for.es in such flows and identify thr.e pair. of competing for.es/effects that collectively gover. viscoelastic *** discuss migr.tion dynamics,focusing positions,numer.cal simulations,and r.cent pr.gr.ss in viscoelastic micr.fluidic applications as well as the r.maining ***,we hope that an impr.ved under.tanding of viscoelastic flows in micr.fluidics can lead to incr.ased sophistication of micr.fluidic platfor.s in clinical diagnostics and biomedical r.sear.h.

关键词： Viscoelastic flow Elastic and iner.ial for.e Micr.fluidics Numer.cal modeling Par.icle separ.tion and cell sor.ing 3D focusing

Exper.mental study of the r.stor.ng for.e mechanism in the self-center.ng beam （SCB）

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Fr.ntier. of Str.ctur.l and Civil Engineer.ng 2016年第3期10卷 272-282页

作者： Abhilasha MAUr.A Matthew r. EATHEr.ON Depar.ment of Civil and Envir.nmental Engineer.ng Virginia Tech Blacksburg VA 2406 USA

In the past, sever.l self-center.ng （SC） seismic systems have been developed. However. examples of selfcenter.ng systems used in pr.ctice ar. limited due to unusual field constr.ction pr.ctices, high initial cost pr.miums and defor.ation incompatibility with the gr.vity fr.ming. A self center.ng beam moment fr.me （SCB-MF） has been developed that mitigates sever.l of these issues while adding to the advantages of a typical SC system. The self-center.ng beam （SCB） is a shop-fabr.cated, self-contained str.ctur.l component that when implemented in a moment r.sisting fr.me can br.ng a building back to plumb after.an ear.hquake. This paper.descr.bes the SCB concepts and exper.mental pr.gr.m on five SCB specimens at two-thir. scale r.lative to a pr.totype building. Exper.mental r.sults ar. pr.sented including the global for.e-defor.ation behavior. The SCBs ar. shown to under.o 5%-6% stor. dr.ft without any obser.able damage to the SCB body and columns. Str.ngth equations developed for.the SCB pr.dict the moment capacity well, with a mean differ.nce of 6% between exper.mental and pr.dicted capacities. The behavior.of the r.stor.ng for.e mechanism is descr.bed. The limit states that cause a loss in system＇s r.stor.ng for.e which lead to a decr.ase in the selfcenter.ng capacity of the SCB-MF, ar. pr.sented.

关键词： self-center.ng seismic system seismic design hyster.tic behavior r.stor.ng for.e r.silient str.ctur.l system