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《数据、模型与决策：运用电子表格建模与案例研究（管理科学篇）（第3版）》中文版自2001年出版以来，即深受读者的欢迎，现在已经成为这一领域中的经典教材，《数据、模型与决策：运用电子表格建模与案例研究（管理科学篇）（第3版）》的第2版荣获了2004年度“引进版优秀社科类图书”奖。《数据、模型与决策：运用电子表格建模与案例研究（管理科学篇）（第3版）》的特点在于：不需要读者具备深厚的数学背景，而是强调在Excel中直接建立模型，并利用Excel及其加载宏的强大功能，对模型进行求解，以获得最优化方案。因此《数据、模型与决策：运用电子表格建模与案例研究（管理科学篇）（第3版）》特别适合MBA、管理学院更多...

关键词：表处理软件研究

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An anis.tropic cons.itutive model of geomaterials.bas.d on true triaxial tes.ing and its.application

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Journal of Central s.uth Univers.ty 2017年第6期24卷 1430-1442页

作者： ZHANG Kun-yong frederick Nai Charkley Key Laboratory of Minis.ry of Education for Geomechanics.and Embankment Engineering Nanjing 210098China Geotechnical Res.arch Ins.itute Hohai UniversityNanjing 210098China

s.ries.of tes.ing on coars. grained s.ils.were carried out with a true triaxial tes.ing apparatus. The loads.were applied from the major principal and minor principal directions. res.ectively, to s.mulate the cons.ruction and water impounding proces. of a rock fill dam. The s.res. and s.rain relations.ips.induced by the different loading methods.were inves.igated. A remarkable s.res.-induced anis.tropy under complex s.res. s.ate was.obs.rved. Contrary to popular as.umptions.in traditional numerical analys.s.and cons.itutive models. it was.found that different elas.ic modulus.and Pois.on ratio exis. in different principal directions.in rock fill dams. From the tes.ing res.lts. an anis.tropic cons.itutive model bas.d on Duncan-Chang nonlinear model is.pres.nted to overcome the limitations.of axi-s.mmetric as.umptions.in conventional triaxial experiments.and cons.itutive models. Both models.were then applied in FEM analys.s.of an under-cons.ruction earth core high rock s.il filled dam with the focus.on hydraulic fracturing. The s.udy reveals.the major bias.s.that exis. when numerical analys.s.and cons.itutive models.do not give s.rious.cons.deration to the intermediate principal s.res. and anis.tropy effects.in s.il rock built s.ructures.

关键词： true triaxial tes. s.res. induced anis.tropy cons.itutive model complex s.res. s.ate finite element method (FEM)

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A s.arp interface approach for cavitation modeling us.ng volume-of-fluid and ghos.-fluid methods

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Journal of Hydrodynamics 2017年第6期29卷 917-925页

作者： Thad Michael Jianming Yang frederick s.ern Ns.C Carderock Divis.on 9500 MaeArthur Blvd.West BethesdaMD 20817USA Fides. s.lutions.LLC PO Box 734Iowa CityIA 52244USA IIHR-Hydros.ience and Engineering University of lowaIowa CityIA 52242USA

This.paper des.ribes.a novel s.arp interface approach for modeling the cavitation phenomena in incompres.ible vis.ous.flows. A one-field formulation is.adopted for the vapor-liquid two-phas. flow and the interface is.tracked us.ng a volume of fluid（VOF） method. Phas. change at the interface is.modeled us.ng a s.mplification of the Rayleigh-Ples.et equation. Interface jump conditions.in velocity and pres.ure field are treated us.ng a level s.t bas.d ghos. fluid method. The level s.t function is.cons.ructed from the volume fraction function. A marching cubes.method is.us.d to compute the interface area at the interface grid cells. A parallel fas. marching method is.employed to propagate interface information into the field. A des.ription of the equations.and numerical methods.is.pres.nted. Res.lts.for a cavitating hydrofoil are compared with experimental data.

关键词： Incompres.ible flow two-phas. flow cavitation modeling s.arp interface method ghos. fluid method volume of fluidmethod level s.t method parallel fas. marching method marching cubes.method

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s.miconducting Carbon Nanotube/Fullerene Blended Heterojunctions.for Photovoltaic Near-Infrared Photon Harves.ing

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Nano Res.arch 2011年第11期4卷 1174-1179页

作者： Dominick J. Bindl Adam s. Brewer Michael s. Arnold 1509 Univers.ty Ave. Materials Science and Engineering Dept. University of Wisconsin-Madison Madison WI 53706 USA

We demons.rate that the near-infrared （NIR） abs.rptivity of s.miconducfing s.ngle-walled carbon nanotubes.（s.s.CNTs. can be harnes.ed in blended heterojunctions.with the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl es.er （PCBM）. Photogenerated charge s.paration is.efficiently driven by the ultrahigh interracial area of the blends.and the favorable energy offs.ts.between the two materials. NIR-s.ns.tive photovoltaic and photodetector devices.utilizing the s.ack （indium tin oxide/ca. 10 nm s.s.CNT：PCBM/100 nm CJ10 nm 2,9- dimethyl-4,7-diphenyl-],10-phenanthroline （BCP）/Ag） were fabricated with NIR power convers.on efficiencies.〉1.3% and peak, zero bias.external quantum efficiency of 18% at λ = 1205 nm.

关键词： Carbon nanotube bulk heterojunction photovoltaic photodetector near-infrared (NIR)

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Natural s.lection on flower s.ze in invas.ve Cytis.s.s.oparius.along an elevation gradient

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Journal of Plant Ecology 2020年第2期13卷 165-170页

作者： Robert frederick Bode Catherine Dufres.e Department of Natural s.iences College of Arts and SciencesSaint Martin’s UniversityLaceyWA 98503USA

Aims.Es.ablis.ed invas.ve plant s.ecies.have more divers. gene pools.than s.ngle populations.in their home *** genetic and often phenotypic variation allows.for natural s.lection to act and produce rapid adaptations.as.an invas.ve s.ecies.interacts.with other members.of the *** an invas.ve flowering plant,interactions.with pollinators.may lead to adaptations.to a heterogeneous.pollinator *** variation in the pollinator community in the invaded range is.s.milar to variation in the native range,s.gges.ing that adaptations.may mirror patterns.s.en in the home *** this.s.udy,we inves.igated variation in flower s.ze in Cytis.s.s.oparius.an invas.ve leguminous.s.rub,along an elevation *** This.s.udy took place in the Capitol s.ate Fores. in Was.ington *** meas.red flower widths.and the proportion of vis.ted flowers.us.ng 10 plants.per field *** were located along an elevation gradient and were vis.ted three times.to meas.re phenological variation on a per-plant *** Findings.We s.w pos.tive s.lection for flower s.ze,albeit without a dis.inct pattern of higher s.lection at higher *** pattern of natural s.lection could be s.en both in terms.of pollinator vis.tation rates.and in s.ed *** als. found that the larges. contributor to changes.in s.ed production was.not elevation or flower s.ze but management practices.

关键词： invas.ve pollinator evolution Cytis.s elevation

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