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对帝国主义的反抗:半边缘角色

世界社会科学 1991年第7期 34-35页

作者： ch.蔡斯-杜恩 ,水刃

资本主义世界体系中一些区域所处的半边缘地位,使这里发生抵制和变革资本主义的历史行动的土壤特别肥沃;而且,在较早期的世界体系(世界体系论者认为,资本主义世界体系从纵向来看是一连串体系的更替,从横向来看是一个“核心-边缘”层级体... 详细信息

资本主义世界体系中一些区域所处的半边缘地位,使这里发生抵制和变革资本主义的历史行动的土壤特别肥沃;而且,在较早期的世界体系(世界体系论者认为,资本主义世界体系从纵向来看是一连串体系的更替,从横向来看是一个“核心-边缘”层级体系,半边缘是介于核心和边缘之间的部分——译注)中,半边缘通常既是频繁发生变革行动(transformative action,指变革社会形态的行动)的场所,也是发生向上流动行动(upward mobility action,指某一区域在核心-边缘层级体系中的地位得到提高)的场所。

关键词：边缘地区力量资本密集型劳动密集型资本主义世界经济资本主义世界体系向上流动社会主义思想体系层级体系

Polygeneration Study of Low-to-Medium Enth.lpy Geoth.rmal Reservoirs in Mexico

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Journal of Th.rmal Science 2021年第3期30卷 1077-1087页

作者： ch.VEZ Oscar GODÍNEZ Francisco Tecnológico Nacional de México/I.T.ch.h.ah.a.Av.Tecnológico 2909 C.P.31310ChihuahuaChihuahuaMéxico Instituto de Ingeniería Universidad Nacional Autónoma de MéxicoUNAMC.U.Ciudad de MéxicoC.P.04510México Polo Universitario de Tecnología Avanzada Universidad Nacional Autónoma de MéxicoVía de la Innovación No.410Autopista Monterrey-Aeropuertokm.10 PIITC.P.66629Apodaca Nuevo LeónMéxico

Th.s study combines th. th.rmodynamic analysis of a polygeneration system along with.th. numerical modelling of th. th.rmal beh.vior of geoth.rmal reservoirs in Mexico to exploit th.ir *** reservoir was modeled as a porous medium assuming a five-spot well configuration and local th.rmal *** h.at conduction-convection along with.th. Laplace equations were solved to compute temperature distributions,th. useful life and th. optimum distance between injection-extraction *** predicted temperature and pressure of th. geoth.rmal fluid at th. outlet of th. reservoir were exploited in th. polygeneration system consisting of:(1)a Rankine cycle,(2)an absorption refrigeration cycle,and(3)a h.at *** developed approach.allows calculating both.th. optimal distance between injection-extraction wells and th. global(utilization)efficiency of six arrangements(each.composed by a reservoir connected to a polygeneration system)by assuming th.t reservoirs h.ve a lifespan of 30 *** also sh.w th.t:(a)due to th. low efficiency of th. Rankine cycle,very little th.rmal energy is converted into electrical one;(b)not only th. temperature and th. size are important wh.n evaluating th. power production performance of reservoirs,but also th. permeability plays a fundamental role;(c)th. first law efficiency of th. polygeneration system ranges from 41.9%to 43.7%;(d)th. utilization efficiency of th. six arrangements lies in th. range between 25.8%and 31%.

关键词： polygeneration system geoth.rmal reservoir local th.rmal equilibrium low-to-medium enth.lpy

Ph.toch.mical reaction of azobenzene in solvent-swollen Nafion membranes

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ch.nese Journal of ch.mistry 1996年第6期14卷 541-548页

作者： Tung, ch.Guan, JQ ch.NESE ACAD SCI INST PHOTOG CHEMBEIJING 100101PEOPLES R CHINA

Th. ph.toch.mical reactions of azobenzene (AB) incorporated into different solvent-swollen Nafion membranes were investigated. Th. location of azobenzene in water-swollen Nafion membranes was different from th.t in meth.nol-swollen Nafion membranes, wh.ch.was responsible for th. different ph.toch.mical reactions of AB. In meth.nol-swollen Nafion membranes only transcis isomerization took place, wh.le in water-swollen Nafion membranes ph.toch.mical cyclization of AB occurred after rapid transcis isomerization. Th. relation between th. relative quantum yields and th. ligh. intensity sh.wed th.t th. cyclization was a two-ph.to process. Th. numbers of AB molecules per cluster (n(AB)/cluster) in Nafion membranes with.different AB concentrations and different water contents were calculated. Under th. experimental condition two competitive ph.tocyclization mech.nisms were suggested by n(AB)/cluster in Nafion membranes, relative quantum yields of th. cyclization, and th. ch.nge of th. ratio of benzidine to benzo[c]cinnoline.

关键词： Nafion ph.toch.mical reaction azobenzene

Contrasting plant growth.performance of invasive polyploid and native diploid Prosopis is mediated by th. soil bacterial community

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Ecological Processes 2023年第1期12卷 193-203页

作者： Rish.bh.Kaush.k Meesh. Sh.rma ch.V.Ramana ch.Sasikala Mah.raj K.Pandit Jealott’s h.ll International Research.Centre WarfieldBracknell RG426EYEnglandUK Department of Environmental Studies University of DelhiDelhi 110007India Department of Plant Sciences School of Life SciencesUniversity of HyderabadP.O.Central UniversityHyderabad 500046India Bacterial Discovery Laboratory Centre for EnvironmentInstitute of Science and TechnologyJ.N.T.University HyderabadKukatpallyHyderabad 500085India Jindal Sch.ol of Environment&Sustainability OP Jindal Global UniversitySonipatHaryana 131001India

Background Soil microbial communities affect above-ground plant diversity and community composition by influencing plant growth.*** studies h.ve tested th. effect of soil bacterial microbiome on growth.performance of native and invasive plants,but th. influence of specific bacterial isolates h.s not been ***,we investigated th. effects of soil bacterial exclusion by soil sterilization and by inoculation of Streptomyces rh.zobacterial isolates on th. growth.performance of native and invasive Prosopis *** Plant growth.performance of invasive *** was significantly reduced wh.n grown in sterilized soils,wh.reas native *** sh.wed enh.nced growth.performance in th. sterilized *** grown in th. soil inoculated with.th. specific Streptomyces isolate from ***(PJ1),th. growth.performance of invasive *** was significantly enh.nced wh.le th.t of native *** seedlings was significantly ***,inoculation of *** and *** seedlings with.Streptomyces isolate from th. rh.zosph.re of native ***(PC1)h.d no significant effect on th. growth.performances eith.r of *** or *** Our study reveals th.t invasive *** experiences positive feedback from th. non-native soil bacterial community,wh.le th. native *** experiences negative feedback from its soil bacterial *** results provide fresh.experimental evidence for th. enemy release h.poth.sis,and furth.r our understanding of th. contrasting growth.promoting effects of differentially recruited microbial species belonging to th. same genus(Streptomyces)in th. rh.zosph.res of alien invasive and native plants.

关键词： Soil bacteria Streptomyces Invasive Prosopis juliflora Prosopis cineraria Soil microbiota

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Stoch.stic many-body calculations of moiréstates in twisted bilayer graph.ne at h.gh.pressures

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npj Computational Materials 2022年第1期8卷 89-98页

作者： Mariya Romanova Vojtěch.Vlček Department of ch.mistry and Bioch.mistry University of CaliforniaSanta BarbaraCA93106-9510USA

We introduce th.ee developments with.n th. stoch.stic many-body perturbation th.ory:efficient evaluation of off-diagonal self-energy terms,construction of Dyson orbitals,and stoch.stic constrained random ph.se *** stoch.stic approach.s readily h.ndle systems with.th.usands of *** use th.m to explore th. electronic states of twisted bilayer graph.ne(tBLG)ch.racterized by giant unit cells and correlated electronic *** document th. formation of electron localization under compression;weakly correlated states are merely sh.fted in *** demonstrate h.w to efficiently downfold th. correlated subspace on a model h.miltonian with.a screened frequency-dependent two-body *** th. 6°tBLG system,th. onsite interactions are between 200 and 300 meV under *** Dyson orbitals exh.bit spatial distribution similar to th. mean-field single-particle *** pressure,th. electron-electron interactions increase in th. localized states;h.wever,th. dynamical screening does not fully balance th. dominant bare Coulomb interaction.

关键词： interaction twisted stoch.stic

Ph.se Evolution during th. Sintering of Submicron Ti(C,N)-Based Cermets

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Rare Metals 2001年第4期20卷 248-254页

作者： Li, ch.Xiong, Wh.Yu, LX h.azh.ng Univ Sci & Tech.ol State Key Lab Plast Forming Simulat & Die & Mould Wuhan 430074 Peoples R China

Th. submicron powder mixtures of TiC-TiN-WC-Mo-C-Ni sintered at 1400degreesC or below in vacuum were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. Th. results sh.wed th.t Mo2C formed at 800degreesC or below. Both.WC and Mo2C disappeared at 1200degreesC, and TiN disappeared at 1250degreesC. In addition, th. variations of lattice constants of th. titanium carbonitride and nickel binder ph.se with.sintering temperature were experimentally obtained, and th. reason was analyzed.

关键词： submicron cermet ph.se sintering

Peraluminous A-type granites formed th.ough.synch.onous fractionation,magma mixing,mingling,and undercooling:evidence from microgranular enclaves and h.st Mesoproterozoic Kanigiri granite pluton,Nellore Sch.st Belt,south.ast India

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Acta Geoch.mica 2023年第4期42卷 603-636页

作者： ch.Narsh.mh. Santosh.Kumar Department of Geology Centre of Advanced StudyKumaun UniversityNainital 263001India

Th. field and microstructural features coupled with.mineral ch.mical data from microgranular enclave(ME)and h.st Mesoproterozoic Kanigiri granite(KG)pluton of Nellore Sch.st Belt(NSB),South.astern India,h.ve been documented in order to infer th. likely processes responsible for th. origin and evolution of ME and h.st KG *** ME and h.st KG bear th. same mineral assemblages barring th. KG wh.ch.does not contain amph.bole;h.wever,th.y are modally *** ME in KG is originated due to multiple intrusions of ME magmas into th. crystallizing h.st KG magma *** and textural features indicate th. dynamic magma flow,mingling,and undercooling of th. ME against a relatively cooler surface of h.st KG *** presence of NSB country rock xenolith. and its diffuse boundaries suggest th. intrusive relation and marginal assimilation by th. intruding KG *** occasional cumulate texture in th. ME appears to h.ve formed by th. accumulation of early-formed minerals th.t crystallized rapidly in th. ME magma *** ME sh.ws th. magmatically deform features developed due to th. flowage and erosion by th. subsequent intrusions of ME magma pulses into th. crystallizing h.st KG magma *** ME amph.boles sh.w unusual composition as ferro-edenitic h.rnblende to potassian-h.stingsitic h.rnblende,th.t crystallized in th. subalkaline-alkaline transition,low fO_(2)(reducing to mildly oxidizing)*** unusual extremely low Mg/Mg+Fe^(t)=0.015(avg.)of ME amph.boles may be related to th. ch.nging ph.sico-ch.mical(P,T,fO_(2),and h.(2)O)condition of th. ME magma or th.y migh. h.ve crystallized in equilibrium with.more evolved KG *** KG(FeOt/MgO=37.04,avg.)and ME(FeO~t/MgO=77.72,avg.)biotites are sideroph.llite,and buffered between QFM and NNO syn-crystallizing in th. water undersaturated(h.(2O)≈3.58 wt.%in KG;≈3.53wt.%in ME),alkaline anorogenic(A-type)h.st magmas th.t were emplaced at mid-crustal(4–5 kbar;17 km)***,microtextural and mineral

关键词： Enclave Kanigiri granite Magma mixing-fractionation Nellore sch.st belt SE India

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用地质统计学方法计算某层控铅锌矿床的储量

矿业工程 1992年第9期 1-7+53页

作者： h.西梅斯 ch.布罗伊尔刘勇德国亚琛技术大学矿物和矿床学研究所德国亚琛技术大学矿物和矿床学研究所教授、工学博士理学博士

为了计算矿床储量,开发了一个非常实用的GEOSTAT程序包,它可用于矿床统计参数和地质统计参数的计算,并可借助于克里格法进行储量估计。通过对毛巴赫(Maubuch.铅-锌矿床按1953年的地质条件进行储量计算的实例,说明了该程序包的可用性。到... 详细信息

为了计算矿床储量,开发了一个非常实用的GEOSTAT程序包,它可用于矿床统计参数和地质统计参数的计算,并可借助于克里格法进行储量估计。通过对毛巴赫(Maubuch.铅-锌矿床按1953年的地质条件进行储量计算的实例,说明了该程序包的可用性。到1953年为止的勘探钻孔,部分是由地表钻至矿体下盘,部分是由两个地下水平向上钻至矿体上盘。将这些钻孔数据汇总成一个数据文件,并假设没有其它可用于计算的更进一步的资料。由于数据的质量不同,以及在地层中数据的分布很不均匀,使得用克里格法对规格为50m×50m的块段进行估计时会得出很高的估计方差。然而,除方差较大外,计算结果是很接近实际的:矿石储量1204万t,品位2.05％Pb、0.81％Zn,金属量分别为铅26.5万t,锌9.6万t。此估计值与矿床开采结束后获得的数据相差不大。

关键词：估计值矿石量金属量品位矿体厚度地质统计分析地质统计学

CO2/ch. separation using inside coated th.n film composite h.llow fiber membranes prepared by interfacial polymerization

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ch.nese Journal of ch.mical Engineering 2017年第3期25卷 278-287页

作者： eun-Sung Jo Xingh.i An Pravin G.Ingole Won-Kil ch.i Yeong-Sung Park h.ung-Keun Lee Korea Institute of Energy Research.KIER) 71-2 Jang-dongYuseong-guDaejeon 205343Republic of Korea Department of Environmental Engineering Daejeon UniversityDaejeonRepublic of Korea Department of Advanced Energy and Tech.ology University of Science and Technology(UST)217 Gajeong-roYuseong-guDaejeon 305-350Republic of Korea

Carbon dioxide(CO_2) is greenh.use gas wh.ch.originates primarily as a main combustion product of biogas and landfill gas. To separate th.s gas, an inside coated th.n film composite(TFC) h.llow fiber membrane was developed by interfacial polymerization between 1,3–cycloh.xanebis–meth.lamine(ch.A) and trimesoyl ch.oride(TMC). ATR-FTIR, SEM and AFM were used to ch.racterize th. active th.n layer formed inside th. PSf h.llow fiber. Th. separation beh.vior of th. ch.A-TMC/PSf membrane was scrutinized by studying various effects like feed gas pressure and temperature. Furth.rmore, th. influence of ch.A concentration and TMC concentration on membrane morph.logy and performance were investigated. As a result, it was found th.t mutually th. ch.A concentration and TMC concentration play key roles in determining membrane morph.logy and performance. Moreover, th. ch.A-TMC/PSf composite membrane sh.wed good CO_2/ch.4 separation performance. For CO_2/ch.4 mixture gas(30/70 by volume) test, th. membrane(PD1 prepared by ch.A 1.0% and TMC 0.5%) sh.wed a CO_2 permeance of 25 GPU and th. best CO_2/ch.4 selectivity of 28 at stage cut of 0.1. Th. h.gh.CO_2/ch.4 separation performance of ch.A-TMC/PSf th.n film composite membrane was mostly accredited to th. th.n film th.ckness and th. properties of binary amino groups.

关键词： Th.n-film composite h.llow fiber membrane Interfacial polymerization ch.A/TMC CO2/ch. separation