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Fundamental pri.ci.les of an effecti.e rei.forci.g roof bolti.g strategy i. hori.ontally layered roof strata and areas of potenti.l i.provement

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i.ternati.nal Journal of Mi.i.g Sci.nce and Technology 2018年第1期28卷 67-77页

作者： Russell Fri.h Guy Reed Marti. mckinnon Mi.e Advi.e Pty Ltd New South Wales 2282Australia

i. i. arguable that the development of rei.forci.g roof bolti.g systems has largely stagnated i. recent ti.es, pri.ari.y due to the prevai.i.g i.dustry vi.w that few, i. any, further i.provements can be made to what currently ***, thi. paper contends that rei.forci.g roof bolti.g systems can be further refi.ed by consi.eri.g both the speci.i. manner by whi.h hori.ontally bedded roof strata loses i.s natural self-supporti.g abi.i.y and the speci.i. means by whi.h rei.forci.g roof bolts act to promote or retai. thi. natural self-supporti.g *** Australi.n coal i.dustry has i.si.ted on mi.i.i.i.g bolt-hole di.meter to maxi.i.e load transfer and on targeti.g full-encapsulati.n by any means necessary for many *** has led to a si.ni.i.ant, albei. uni.tended, consequence i. terms of overall roof bolti.g effecti.eness, namely i.creased resi. pressures duri.g bolt i.stallati.n and the associ.ted potenti.l for openi.g beddi.g planes that may have, otherwi.e, remai.ed closed duri.g the bolt i.stallati.n *** that the natural self-supporti.g abi.i.y of roof strata i. strongly li.ked to whether beddi.g planes are open or closed, logi.ally, mi.i.i.i.g resi. pressures should be a si.ni.i.ant *** paper focuses pri.ari.y on three key i.sues that relate di.ectly to the functi.n of the roof bolti.g system i.self:(1) the i.portance of proper resi. mi.i.g i. the context of maxi.i.i.g load transfer strength and sti.fness,(2) the i.portance of mi.i.i.i.g resi. pressures developed duri.g bolt i.stallati.n, and(3) the i.portance of maxi.i.i.g the effecti.eness of the avai.able bolt *** mi.e operators should be i.vested i. i.provi.g the i.di.i.ual effecti.eness of each i.stalled roof bolt, even by relati.ely small i.cremental amounts, so thi. i. an i.portant topi. for di.cussi.n wi.hi. the mi.i.g communi.y.

关键词： Roof bolts Strata rei.forcement Parti.l-encapsulati.n Pre-tensi.n Resi. mi.i.g i.proved bolt effecti.eness

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Test measurements for accuracy of absolute and relati.e GPS posi.i.ni.g

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中国有色金属学会会刊：英文版 2005年第S1期15卷 299-303页

作者： i. Havasi Uni.ersi.y of Mi.kolc Hungary

The paper, after the i.troducti.n, bri.fly outli.es the pri.ci.les of both absolute and relati.e GPS posi.i.ni.g. i. deals wi.h factors and error resources affecti.g the accuracy of these surveyi.g procedures. i. revi.ws the geodeti. determi.ati.n of a reference poi.t and a base li.e used for the test measurements. The study descri.es the completed test measurements, and on the basi. of results, i. draws the conclusi.ns for the accuracy of the i.vesti.ated surveyi.g methods. Fi.ally, consi.eri.g these accuracy measures, thei. possi.le appli.ati.n i. mi.e surveyi.g i. also menti.ned very shortly.

关键词： GPS surveyi.g methods factors and errors test measurements accuracy

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Angular unconformi.y i. Pennsylvani.n strata from 3-D sei.mi. i.terpretati.n,Goldsmi.h Fi.ld,West Texas

Energy Geoscience

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Energy Geosci.nce 2024年第2期5卷 298-303页

作者： Edwi. i.Egbobawaye Nelly Omoruyi.Abdulmutalli. Ami.u Robert Trentham Mohamed K.Zobaa Sumi. Verma Ki.der Morgan MidlandTX79705USA Department of Geosci.nces University of Texas Permian BasinOdessaTX79762USA

The Pennsylvani.n unconformi.y,whi.h i. a detri.al surface,separates the beds of the Permi.n-aged strata from the Lower Paleozoi. i. the Central Basi. *** data i.terpretati.n i.di.ates that the unconformi.y i. an angular unconformi.y,overlyi.g multi.le normal faults,and accompani.d wi.h a thrust fault whi.h maxi.i.es the regi.n's structural ***,the Pennsylvani.n angular unconformi.y creates pi.ch-outs between the beds above and *** computed the spectral decomposi.i.n and reflector convergence attri.utes and analyzed them to characteri.e the angular unconformi.y and *** spectral decomposi.i.n attri.ute di.i.es the broadband sei.mi. data i.to di.ferent spectral bands to resolve thi. beds and show thi.kness *** contrast,the reflector convergence attri.ute hi.hli.hts the locati.n and di.ecti.n of the pi.ch-outs as they di. south at angles between 2° and 6°.After revi.wi.g fi.di.gs from RGB blendi.g of the spectrally decomposed frequenci.s along the Pennsylvani.n unconformi.y,we observed channel-li.e features and multi.le li.ear bands i. addi.i.n to the faults and *** can be i.ferred that the i.enti.i.d li.ear bands could be the result of di.ferent li.hologi.s associ.ted wi.h the ti.ti.g of the beds,and the faults may possi.ly i.fluence hydrocarbon mi.rati.n or act as a flow barri.r to entrap hydrocarbon *** i.enti.i.ati.n of thi. angular unconformi.y and the associ.ted features i. the study area are vi.al for the followi.g reasons:1)the unconformi.y surface represents a natural strati.raphi. boundary;2)the strati.raphi. pi.ch-outs act as flui. flow connecti.i.y boundari.s;3)the areal extent of compartmentali.ed reservoi.s'boundari.s created by the angular unconformi.y are better defi.ed;and 4)fault di.placements are better understood when planni.g well locati.ns as faults can be flow barri.rs,or permeabi.i.y condui.s,dependi.g on faci.s heterogenei.y and/or seal effecti.eness of a fault,whi.h

关键词： Pennsylvani.n unconformi.y Sei.mi. data i.terpretati.n Spectral decomposi.i.n Reflector convergence Reservoi. characteri.ati.n

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BaTi.3 soli. soluti.ns co-doped wi.h Gd3+ and Eu3+:Synthesi.,structural evoluti.n and di.lectri. properti.s

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Journal of Rare Earths 2024年第10期42卷 1920-1926页

作者： R.Martínez-López M.Pérez-Labra J.A.Romero-Serrano F.R.Barri.ntos-Hernández M.Reyes-Pérez M.i.Valenzuela-Carri.lo G.Urbano-Reyes V.E.Reyes-Cruz G.i.Dávi.a-Puli.o Academi. Area of Earth Sci.nces and Materi.ls Autonomous University of Hidalgo State Metallurgy and Materi.ls Department ESIQIE-IPNUPALM Autonomous Uni.ersi.y of Coahui.a Boulevard Adolfo López Mateos S/n

i. thi. paper,the synthesi.,structural evoluti.n,and di.lectri. properti.s of BaTi.3soli. soluti.ns codoped wi.h rare earth elements(Gd3+and Eu3+) prepared usi.g the soli.-state reacti.n method are *** pure precursor powders of BaCl3,Ti.2,Gd2O3,and Eu2O3were mi.ed i. stoi.hi.metri. proporti.ns,ground i. an agate mortar before bei.g uni.xi.lly pressed at 250 MPa and si.tered at 1300℃ i. ai. atmosphere for 6 h to obtai. Ba1-3xGd2xTi.-3xEu4xO3（x=0,0.0015,0.01 and0.1）.X-ray di.fracti.n（XRD） and Ri.tveld's refi.ement results reveal the crystal phase ferroelectri. tetragonal BaTi.3for the samples wi.h x=0,0.0015 and 0.01, as well as a consi.tent i.crement i. the latti.e parameters caused by the *** solubi.i.y li.i. of Gd3+and Eu3+i. the BaTi.3structure i. reached for the sample wi.h x>0.01,and the orthorhombi. Eu2Ti.5and monocli.i. BaTi.O5secondary phases were *** Raman results show the characteri.ti. peaks of ferroelectri. tetragonal BaTi.3around 716 cm-1（LO of A1 symmetry）,515 cm-1（TO of A1 symmetry）,and 305 cm-1（B1）.The maxi.um relati.e permi.ti.i.y measured at 1 kHz was recorded to be 6151.8 for the sample wi.h x=0.0015,and a decrease i. the Curi. temperature to 105℃ wi.h respect to the undoped sample was *** punctual mi.roanalysi. for the samples wi.h x=0.0015,0.01,and 0.1 reveals grai.s composed of Ba,Ti.O,Gd,and Eu homogeneously di.tri.uted i. the *** Ba/Ti.rati.s for samples wi.h x=0.0015,0.01 and 0.1 are 2.86,2.91,and 0.68,respecti.ely,i.di.ati.g substi.uti.n at the Ti.si.e for samples wi.h x=0.0015 and 0.01 and a substi.uti.n at the Ba si.e for the sample wi.h x=0.1.

关键词： BaTi.3 Dopi.g Europi.m Gadoli.i.m Rare earths Synthesi.

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Analysi. of parti.le di.persi.n and cavi.y formati.n duri.g bulk parti.le water entry usi.g fully coupled CFD-DEM-VOF approach

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Parti.uology 2024年第7期90卷 558-580页

作者： Utkan Çalışkan Sanja Mi.kovi. Norman B.Keevi. i.sti.ute of Mi.i.g Engi.eeri.g University of British Columbia2329 West MallVancouverBC V6T 1Z4Canada

Thi. paper presents the development and vali.ati.n of a fully coupled computati.nal flui. dynami.s—di.crete element method—volume of flui.(CFD-DEM-VOF)model to si.ulate the complex behavi.r of parti.le-laden flows wi.h free *** coupli.g between the flui. and parti.le phases i. establi.hed through the i.plemented conti.ui.y,momentum,and alpha transport *** coupled parti.le forces such as drag,pressure gradi.nt,dense vi.tual mass,vi.cous,and i.terface forces are also i.tegrated,wi.h drag and dense vi.tual mass forces bei.g dependent on local *** i.tegrated conservati.e alpha transport equati.n ensures phase volume conservati.n duri.g i.teracti.ns between parti.les and ***,we have i.plemented a tri.i.ear i.terpolati.n method desi.ned to operate on unstructured hexahedral *** method has been tested for i.s abi.i.y to properly resolve the coupli.g effects i. the numeri.al si.ulati.ns,parti.ularly i. cases wi.h a relati.ely low cell-si.e *** model i. vali.ated through three di.ti.ct test cases:si.gle parti.le water entry,dam break wi.h parti.les,and water entry of a group of parti.les *** experi.ental setup i. bui.t to study the dynami.s of the water entry of a group of parti.les,where three key flow features are analyzed:the evoluti.n of average parti.le veloci.y,cavi.y shape,and parti.le di.persi.n cloud profi.es i. *** tests i.volve four di.ferent scenari.s,i.cludi.g two di.ferent water levels(16.1 and 20.1 cm)and two di.ferent parti.le densi.i.s(2650 and 4000 kg/m3).Hi.h-speed vi.eometry and parti.le tracki.g veloci.etry(usi.g i.ageJ/TrackMate)methods are employed for experi.ental data *** i. demonstrated that numeri.al results are i. excellent agreement wi.h theoreti.al predi.ti.ns and experi.ental *** study hi.hli.hts the si.ni.i.ance of vorti.es i. cavi.y shapi.g and parti.le *** vali.ated CFD-DEM-VOF model consti.utes a robust tool for si.ulati.g parti.le-laden flows,cont

关键词： CFD-DEM-VOF Tri.i.ear i.terpolati.n Parti.le-laden flow Free-surface Parti.le water entry Volume conservati.n

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Sesamum i.di.um(sesame) enhances NK anti.cancer acti.i.y, modulates Th1/Th2 balance, and suppresses macrophage i.flammatory response

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Asi.n Paci.i. Journal of Tropi.al Bi.medi.i.e 2020年第7期10卷 316-324页

作者： Ami. FMajdalawi.h Jenna F.Farraj ronald i.Carr Department of Bi.logy Chemistryand Environmental SciencesFaculty of Arts and SciencesAmerican University of SharjahSharjahP.O.Box 26666United Arab Emirates Department of Mi.robi.logy and i.munology Faculty of MedicineSir Charles Tupper Medical BuildingDalhousie UniversityHalifaxNova ScotiaCanada B3H 4R2

Objecti.e:To evaluate the potenti.l i.munomodulatory effects of an aqueous extract of Sesamum i.di.um seeds wi.h regard to splenocyte proli.erati.n,Th1/Th2 balance,macrophage functi.n,and the cytotoxi. acti.i.y of natural ki.ler(NK)***:Splenocyte proli.erati.n was measured by[~3H]-thymi.i.e *** assay was performed to evaluate the producti.n of ni.ri. oxi.e by *** levels of cytoki.es secreted by splenocytes and macrophages were measured by *** assay was performed to exami.e the cytotoxi. acti.i.y of NK cells agai.st YAC-1 tumor ***:Sesamum i.di.um si.ni.i.antly enhanced splenocyte proli.erati.n i. a dose-dependent *** i.di.um also i.creased and suppressed the secreti.n of Th1 and Th2 cytoki.es,respecti.ely,by *** secreti.n of key pro-i.flammatory medi.tors(i.-6,TNFα,and ni.ri. oxi.e)by pri.ary macrophages was si.ni.i.antly i.hi.i.ed by Sesamum ***,Sesamum i.di.um i.creased the cytotoxi. acti.i.y of NK cells agai.st YAC-1 tumor ***:Sesamum i.di.um shows potent i.munomodulatory,anti.i.flammatory,and anti.cancer *** of Sesamum i.di.um may be used as effecti.e therapeuti. agents i. regulati.g i.mune reacti.ns i.pli.ated i. vari.us i.fecti.us and noni.fecti.us condi.i.ns i.cludi.g cancer.

关键词： Sesamum i.di.um Anti.cancer i.flammati.n i.munomodulati.n Macrophages NK cells

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野蛮的不平等：资本主义危机与剩余人口

当代中国马克思主义研究

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当代中国马克思主义研究 2024年第02期 131-142页

作者：威廉·i.罗宾逊优素福·K.贝克唐闻笳加州大学圣塔芭芭拉分校加州州立大学长滩分校高等教育出版社思政教育出版事业部复旦大学马克思主义学院

世界范围内不平等的升级显露出全球资本主义的危机。它既是结构性的资本过度积累危机，也是政治性的霸权危机。通过深入探讨全球资本主义及全球劳动力结构的重组现状，可以看出，资本主义全球化破坏了原先民族国家层面的再分配机制，引... 详细信息

世界范围内不平等的升级显露出全球资本主义的危机。它既是结构性的资本过度积累危机，也是政治性的霸权危机。通过深入探讨全球资本主义及全球劳动力结构的重组现状，可以看出，资本主义全球化破坏了原先民族国家层面的再分配机制，引发空前的全球社会两极分化，加剧了积累过剩的压力。面对结构性经济停滞，跨国资本家阶级转而采用多种机制以维持资本积累，包括金融投机、掠夺公共财政资源和军事化积累等。数字化进程使全球资本主义结构经历新的重组，加剧了“不稳定无产者化”，扩充了剩余劳动力和剩余人口，不利于工人阶级意识的建构及其各层级团结的实现。资本主义危机造成了21世纪法西斯主义和全球警察国家的危险，但也为人类解放事业带来了新的可能性：在不稳定工作安排下被纳入全球资本循环的工人运动同“剩余人口”及其在社会再生产边缘和关键节点的抵抗之间的联合。

关键词：不稳定无产者全球资本主义全球不平等剩余劳动力资本主义危机

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Explori.g Trees Di.ersi.y and Ecologi.al Value of Mountai. Forests i. the Blue Ni.e Regi.n of Sudan

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Open Journal of Ecology 2024年第3期14卷 245-256页

作者： Dafa-Alla M. Dafa-Alla Haytham H. Gi.reel Ahmed A. H. Si.di. Yousi. E. Yagoub Hashi. A. Abdelkari. Khati. H.T. Saeed Ahmed i. Abuelbashar Faculty of Forestry-Shambat University of Khartoum Khartoum Sudan Harvard Forest Harvard University Petersham MA USA Faculty of Forest Sci.nce and Wood Technology University of Gezira Wad-Medani Sudan Department of Forestry and Range Sci.nces Faculty of Natural Resources and Environmental Studies Alsalam University Alfula Sudan Forest Research and Gum Arabi. Centre Agricultural Research Corporation Khartoum-Soba Sudan

We carri.d out thi. research at Abu-Gaddaf Natural Forest Reserve (ANFR) whi.h i. located east of Blue Ni.e Ri.er, i. Blue Ni.e State, Sudan. i. ai.s at explori.g tree composi.i.n assessi.g thei. di.ersi.y i.di.es, and ecologi.al i.portance values. For survey of types and esti.ati.n of densi.y of tree speci.s i. the forest, we randomly di.tri.uted 97 ci.cular sample plots (0.1 hectare (ha)). i. each sample plot we i.enti.i.d all trees to the speci.s level, recorded thei. frequenci.s and computed speci.s di.ersi.y and i.portance value i.di.es (i.i.. A total of 13 tree speci.s, whi.h belong to 12 genera and ni.e fami.i.s, were i.enti.i.d i. the tree layer of the forest. Mean tree densi.y i. ANFR was 116 trees/ha, composed mai.ly of Boswelli. papyri.era (Del.) Hochst. (48), followed by Combretum hartmanni.nu (19) and Lannea fruti.osa (18). Fabaceae was the most common fami.y followed by Combretaceae and Malvaceae. B. papyri.era Deli.e Hochst was the most abundant whi.e Acaci. seyal was the least abundant speci.s. Speci.s ri.hness (R = 1.71), evenness (E = 0.69), domi.ance (0.24) i.di.es and Si.pson’s i.dex of Di.ersi.y (D' = 0.76) suggest a moderate di.ersi.y, moderate numbers of i.di.i.uals i. each speci.s and a moderate communi.y stabi.i.y. The research provi.es empi.i.al results on di.ersi.y and ecologi.al i.portance value of speci.s, si.ni.i.s the urgi.g need to safeguard threatened speci.s and to pri.ri.i.e them for conservati.n, as well as the need to promote management of abundant speci.s to provi.e multi.le forest ecosystem servi.es.

关键词： Tree Speci.s Di.ersi.y Dry-Land Forest Sudan

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i.teracti.n of edge di.locati.ns wi.h voi.s i. tungsten

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Tungsten 2024年第3期6卷 633-646页

作者： Arseny Kazakov Ri.a i.Babi.heva Aleksandr Zi.ovev Dmi.ry Terentyev Kun Zhou Elena A.Korzni.ova Sergey V.Dmi.ri.v Research Laboratory for Metals and Alloys under Extreme i.pacts Ufa University of Science and Technology i.sti.ute for Metals Superplasti.i.y Problems of RAS School of Mechani.al and Aerospace Engi.eeri.g Nanyang Technological University i.sti.ute for Nuclear Energy Technology Belgian Nuclear Research Center Technologi.al Machi.es and Equi.ment Department Ufa State Petroleum Technological University i.sti.ute of Mechani.al Sci.nce Problems of RAS i.sti.ute of Molecule and Crystal Physi.s UFRC of Russian Academy of Sciences

Tungsten i. wi.ely used as a materi.l capable of wi.hstandi.g extreme operati.g condi.i.ns and i. one of the candi.ates for use i. fusi.n and Generati.n Ⅳ fi.si.n *** modelli.g i.plemented to solve vari.us materi.l sci.nce problems i. an i.di.pensable approach for i.provi.g materi.l *** work analyzes the i.teracti.n of an edge di.locati.n wi.h a voi. i. si.gle-crystal tungsten wi.h the help of molecular dynami.s *** di.ferent approaches for studyi.g the dynami.s of di.locati.ns i. tungsten that di.fer i. boundary condi.i.ns are *** i.teracti.ns of the di.locati.n and voi. at di.ferent temperatures are i.vesti.ated,and based on the obtai.ed stress-strai. curves,the di.locati.n obstacle strength for voi.s havi.g vari.us di.meters i. *** i. shown that when appli.d to a crystal wi.h small voi.s,the model wi.h the fi.ed boundary condi.i.ns returns i.correct ***,the i.fluence of the cell si.e for the model wi.h peri.di. boundary condi.i.ns i. analyzed,and the case of a non-central i.teracti.n of a di.locati.n wi.h a voi. i. *** obtai.ed results i.prove our understandi.g of the mechani.al response of i.radi.ted materi.ls.

关键词： Tungsten Molecular dynami.s method Di.locati.ns Voi.s Boundary condi.i.ns

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Across two phylogeographi. breaks: Quaternary evoluti.nary hi.tory of a mountai. aspen (Populus rotundi.oli.) i. the Hengduan Mountai.s

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Plant Di.ersi.y 2024年第3期46卷 321-332页

作者： Ji.shi.Tang Xi.oyan Fan Ri.hard i.Mi.ne Heng Yang Wenji.g Tao Xi.ran Zhang Mengyun Guo Ji.li.ng Li.Kangshan Mao Key Laboratory of Bi.-Resource and Eco-Envi.onment of Mi.i.try of Educati.n College of Life SciencesState Key Laboratory of Hydraulics and Mountain River EngineeringSichuan UniversityChengdu 610065PR China i.sti.ute of Molecular Plant Sci.nces University of EdinburghEdinburgh EH93JHUK School of Ecology and Envi.onment Tibet UniversityLhasa 850000PR China

Bi.geographi.al barri.rs to gene flow are central to plant *** East Asi.,plant di.tri.uti.n i. greatly i.fluenced by two phylogeographi. breaks,the Mekong-Salween Di.i.e and Tanaka-Kai.ong Li.e,however,few studi.s have i.vesti.ated how these barri.rs affect the geneti. di.ersi.y of speci.s that are di.tri.uted across *** we used 14 mi.rosatelli.e loci.and four chloroplast DNA fragments to exami.e geneti. di.ersi.y and di.tri.uti.n patterns of 49 populati.ns of Populus rotundi.oli.,a speci.s that spans both the Mekong-Salween Di.i.e and the Tanaka-Kai.ong Li.e i. southwestern *** and mi.rati.n hypotheses were tested usi.g coalescent-based *** hi.tori.al gene flow was observed between the western and eastern groups of ***,but substanti.l flow occurred across both the Mekong-Salween Di.i.e and Tanaka-Kai.ong Li.e,mani.esti.g i. clear admi.ture and hi.h geneti. di.ersi.y i. the central ***-borne pollen and seeds may have faci.i.ated the di.persal of *** followi.g prevalent northwest wi.ds i. the *** also found that the Hengduan Mountai.s,where multi.le geneti. barri.rs were detected,acted on the whole as a barri.r between the western and eastern groups of *** ni.he modeli.g suggested that *** has undergone range expansi.n si.ce the last glaci.l maxi.um,and demographi. reconstructi.n i.di.ated an earli.r populati.n expansi.n around 600 *** phylogeographi. pattern of *** reflects the i.terplay of bi.logi.al trai.s,wi.d patterns,barri.rs,ni.he di.ferenti.ti.n,and Quaternary cli.ate *** study emphasi.es the need for multi.le li.es of evi.ence i. understandi.g the Quaternary evoluti.n of plants i. topographi.ally complex areas.

关键词： Chloroplast DNA Mi.rosatelli.e Phylogeographi. break Populus rotundi.oli. Quaternary hi.tory Wi.d di.ecti.n

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