检索结果-南通市图书馆

a. a.a.ytica. solution for eva.ua.ing the sa.ety of a. exposed fa.e in a.pa.te ba.kfill stope incorpora.ing the a.ching phenomenon

在线全文

学校读者我要写书评

暂无评论

Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2019年第10期26卷 1206-1216页

作者： Xu Zha. andy Fourie Chong-chong Qi School of Civil Environmental and Mining EngineeringUniversity of Western AustraliaPerth 6009Australia School of Resources a.d Sa.ety Engineering Central South UniversityChangsha 410083China

In current underground mining, the sta.ility of the exposed ba.kfill fa.e is a.ba.ic issue a.socia.ed with mining design a.d ha. been the subject of considera.le resea.ch in mining sa.ety a.d efficiency. In this study, a. improved a.a.ytica. solution for eva.ua.ing the sa.ety of vertica.ly exposed fa.es in ba.kfilling wa. proposed. Ba.ed on a.differentia. slice method, the proposed solution empha.izes the a.ching effect a. ha.ing the a.va.ta.es of more rigor a.d wider sca.a.ility. Fea.ibility of the proposed solution wa. va.ida.ed with cla.sic centrifuge results. Good a.reement between compa.ed results indica.ed tha. the proposed solution skillfully predicts the beha.ior of the pa.te centrifuge model. a.ditiona.ly, ca.cula.ion of exposed fa.e sa.ety in sequentia. filling wa. presented. The proposed solution ha. pra.tica. significa.ce in mine ba.kfill design.

关键词： mine sa.ety cemented pa.te ba.kfill exposed fa.e a.ching sequentia. filling

Multi-tempora. a.a.ysis of pa.t a.d future la.d cover cha.ge in the highly urba.ized sta.e of Sela.gor,Ma.a.sia

在线全文

学校读者我要写书评

暂无评论

Ecologica. Processes 2022年第1期11卷 93-107页

作者： Ma.id a.a.i La.a. Billa.andy Cha. Depa.tment of Civil Engineering University of Nottingham MalaysiaJalan Broga43500 SemenyihSelangorMalaysia School of Environmenta. a.d Geogra.hica. Sciences University of Nottingham MalaysiaJalan BrogaSelangor 43500 SemenyihMalaysia

Ba.kground:This study a.a.ysed the multi-tempora. trend in la.d cover,a.d modelled a.future scena.io of la.d cover for the yea. 2030 in the highly urba.ized sta.e of Sela.gor,*** study used a.Decision Forest-Ma.kov cha.n model in the la.d cha.ge modeller(LCM)tool of TerrSet *** cover ma.s of 1999,2006 a.d 2017 were cla.sified into 5 cla.ses,na.ely wa.er,na.ura. vegeta.ion,a.riculture,built-up la.d a.d clea.ed la.d.a.simula.ed la.d cover ma. of 2017 wa. va.ida.ed a.a.nst the a.tua. la.d cover ma. *** a.ea.Under the Curve(a.C)va.ue of 0.84 of Tota. Opera.ing Cha.a.teristics(TOC)a.d higher percenta.e of components of a.reement(Hits+Correct rejection)compa.ed to components of disa.reement(Misses+Fa.se a.a.m+Wrong hits)indica.ed successful va.ida.ion of the ***:The results showed between the yea.s 1999 to 2017 there wa. a. increa.e in built-up la.d cover of 608.8 km^(2)(7.5%),a.d a.ricultura. la.d 285.5 km^(2)(3.5%),wherea. na.ura. vegeta.ion decrea.ed by 831.8 km^(2)(10.2%).The simula.ed la.d cover ma. of 2030 showed a.continua.ion of this trend,where built-up a.ea.is estima.ed to increa.e by 723 km^(2)(8.9%),a.d a.ricultura. la.d is estima.ed to increa.e by 57.2 km^(2)(0.7%),lea.ing to a.decrea.e of na.ura. vegeta.ion by 663.9 km^(2)(8.1%)for the period 2017 to *** spa.ia. trend of la.d cover cha.ge shows built-up a.ea. mostly loca.ed in centra. Sela.gor where the highly urba.ized a.d popula.ed cities of Kua.a.Lumpur a.d Putra.a.a.a.d the Kla.g va.ley a.e ***:The future la.d cover modelling indica.es tha. built-up expa.sion mostly ta.es pla.e a. edges of existing urba. *** results of this study ca. be used by policy ma.ers,urba. pla.ners a.d other sta.eholders for future decision ma.ing a.d city pla.ning.

关键词： La.d cover modelling La.d use a.d la.d cover La.d cha.ge modeller Ma.kov cha.n model Sela.gor Ma.a.sia

Photonic orbita. a.gula. momentum with controlla.le orienta.ion

在线全文

学校读者我要写书评

暂无评论

Na.iona. Science Review 2022年第7期9卷 56-62页

作者： Chenha. Wa. Jia. Chen andy Chong Qiwen Zha. School of Optica.-Electrica. a.d Computer Engineering University of Shanghai for Science and Technology Depa.tment of Physics University of Dayton School of Optica. a.d Electronic Informa.ion Huazhong University of Science and Technology Depa.tment of Electro-Optics a.d Photonics University of Dayton

Vortices a.e whirling disturba.ces,commonly found in na.ure,ra.ging from tremendously sma.l sca.es in Bose-Einstein condensa.ions to cosmologica.ly colossa. sca.es in spira. *** optica. vortex,genera.ly a.socia.ed with a.spira. pha.e,ca. ca.ry orbita. a.gula. momentum(Oa.).The optica. Oa. ca. either be in the longitudina. direction if the spira. pha.e twists in the spa.ia. doma.n or in the tra.sverse direction if the pha.e rota.es in the spa.iotempora. *** this a.ticle,we demonstra.e the intersection of spa.iotempora. vortices a.d spa.ia. vortices in a.wa.e *** a.result of this intersection,the wa.e pa.ket hosts a.tilted Oa. tha. provides a. a.ditiona. degree of freedom to the a.plica.ions tha. ha.ness the Oa. of photons.

关键词： orbita. a.gula. momentum spa.iotempora. vortex spa.ia. vortex spira. pha.e

a.a.ysis of Stored Energy in Cold-Rolled Copper Using Bulk a.d Microstructure-Ba.ed Techniques

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

a.ta.Meta.lurgica.Sinica.English Letters) 2016年第4期29卷 313-319页

作者： Sha.-Qua. Deng andy Godfrey Wei Liu Key La.ora.ory of a.va.ced Ma.eria.s (MOE) School of Materials Science and Engineering Tsinghua University

Mea.urements of stored energy ha.e been obta.ned for sa.ples of copper cold-rolled to von Mises stra.ns between 0.42 a.d 5.21 using both differentia. sca.ning ca.orimetry （DSC）, a.d ba.ed on mea.urements of microstructura. pa.a.eters in the tra.smission electron microscope （TEM）. In both ca.es, a.linea. increa.e in stored energy with stra.n is found. The ra.io between the two mea.ured va.ues va.ies, however, over a.significa.t ra.ge, indica.ing tha. some ca.tion is needed in determining the rela.ive difference in energy a.socia.ed with deforma.ion microstructure heterogeneities in a.given sa.ple. Compa.ison of the stored energy with the flow stress suggests tha. the TEM-ba.ed mea.urements reflect the disloca.ion density content responsible for the flow stress, but tha. the DSC technique a.ditiona.ly mea.ures other contributions to the stored energy, such a. the presence of ba.a.ced interna. stresses.

关键词： Stored energy Differentia. sca.ning ca.orimetry Microstructure Flow stress Copper

The Siberia. Tra.s a.d the End-Permia. ma.s extinction:a.critica. review

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2009年第1期54卷 20-37页

作者： andy Sa.NDERS Ma.c REICHOW Depa.tment of Geologica. Sciences University of Leicester

The a.socia.ion between the Siberia. Tra.s,the la.gest continenta. flood ba.a.t province,a.d the la.gest-known ma.s extinction event a. the end of the Permia. period,ha. been strengthened by re-cently-published high-precision 40a./39a. da.es from widesprea. loca.ities a.ross the Siberia. prov-ince[1]. We a.gue tha. the impa.t of the volca.ism wa. a.plified by the preva.ling la.e Permia. envi-ronmenta. conditions―in pa.ticula.,the hothouse clima.e,with sluggish ocea.ic circula.ion,tha. wa. lea.ing to widesprea. ocea.ic a.oxia. Volca.ism relea.ed la.ge ma.ses of sulpha.e a.rosols a.d ca.bon dioxide,the former triggering short-dura.ion volca.ic winters,the la.ter lea.ing to long-term wa.ming. Whilst the ma.s of CO2 relea.ed from individua. eruptions wa. sma.l compa.ed with the tota. ma.s of ca.bon in the a.mosphere-ocea. system,the long ‘mea. lifetime’ of a.mospheric CO2,com-pa.ed with the eruption flux a.d dura.ion,mea.t tha. significa.t a.cumula.ion could occur over periods of 105 yea.s. Compromise of the ca.bon sequestra.ion systems (by curta.lment of photosynthesis,de-struction of bioma.s,a.d wa.ming a.d a.idifica.ion of the ocea.s) proba.ly led to ra.id a.mospheric CO2 build-up,wa.ming,a.d sha.low-wa.er a.oxia.lea.ing ultima.ely to ma.s extinction.

关键词：西伯利亚二叠纪温室气候海洋缺氧 CO2 SO2

Endura.ce tests a.e the most relia.le core sta.ility rela.ed mea.urements

在线全文

学校读者我要写书评

暂无评论

Journa. of Sport a.d Hea.th Science 2012年第2期1卷 121-128页

作者： andy Wa.dhelm Li Li Depa.tment of Kinesiology Louisiana State University112 Long FieldhouseBaton RougeLA 70803USA

Purpose:To determine the intra.tester relia.ility of clinica. mea.urements tha. a.sess five components rela.ed to core sta.ility:strength. endura.ce,flexibility,motor control,a.d function. Methods:Pa.ticipa.ts were 15 college-a.ed ma.es who ha. not suffered a.y orthopedic injury in the pa.t *** strength mea.urements included eight isometric tests a.d a.sit-up *** four core endura.ce tests were the trunk flexor test,trunk extensor test,a.d bila.era. side bridge *** tests included the sit-a.d-rea.h test a.d a.tive ra.ge of the trunk a.d hip joint *** via.pa.sive reposition tests of the hips a.d a.single limb ba.a.ce test on a. unstea.y pla.form were used to eva.ua.e core motor *** mea.urements consisted of a.squa. test a.d a.single leg hop test for time a.d *** were performed during two da.a.collection sessions with a.week’s rest between the ***-cla.s correla.ion coefficients were ca.cula.ed to esta.lish relia.ility. Results:The overa.l intra.ra.er relia.ility for a.l core sta.ility rela.ed mea.urements ra.ged from low(ICC = 0.35,left hip reposition) to very high(ICC = 0.98,sit-a.d-rea.h).a. a.group,the core endura.ce tests were observed to be the most relia.le. Conclusion:There a.e highly relia.le tests in ea.h of the five ***,core endura.ce tests a.e the most relia.le mea.urements,followed by the flexibility,strength,neuromuscula. control,a.d functiona. tests,respectively.

关键词： Core sta.ility Endura.ce Relia.ility Strength

Psycho-emotiona. content of illness na.ra.ive ma.ter plots for people with chronic illness:Implica.ions for a.sessment

在线全文

学校读者我要写书评

暂无评论

World Journa. of Psychia.ry 2018年第3期8卷 79-82页

作者： andy Soundy School of Sport Exercise and Rehabilitation SciencesUniversity of Birmingham

Illness na.ra.ives a.e stories of illness told by pa.ients with chronic illness. One wa. of studying illness na.ra.ives is by considering illness na.ra.ive ma.ter *** exa.ina.ion of illness na.ra.ive ma.ter plots ha. revea.ed the importa.ce of psycho-emotiona. informa.ion conta.ned within the story tha. is told. There is a.need for resea.ch to ca.ture this informa.ion in order to better understa.d how common stories a.d experiences of illness ca. be understood a.d used to a.d the menta. well-being of individua.s with chronic illness. The current editoria. provides a.suggestion of how this is possible. This editoria. identifies tha. stories ca. be "ma.ped" gra.hica.ly by combining emotiona. responses to the illness experience with psychologica. responses of the illness experience rela.ing to hope a.d psychologica. a.a.ta.ion. Clinicia.s a.d resea.chers should consider the evidence presented within this editoria. a.:(1) a.possible solution for documenting the menta. wellbeing of individua.s with chronic illness; a.d(2) a. a.tool tha. ca. be used to consider cha.ges in menta. well-being following a. intervention. Further resea.ch using this tool will likely provide insights into how illness na.ra.ive ma.ter plots a.e a.socia.ed together a.d cha.ge a.ross the course of a.chronic illness. This is pa.ticula.ly importa.t for illness na.ra.ive ma.ter plots tha. a.e difficult to tell or tha. a.e illustra.ive of a.decline in menta. well-being.

关键词： Illness na.ra.ives a.sessment Emotions Psychologica. a.a.ta.ion Hope

Sa.ety of ba.rica.es in cemented pa.te-ba.kfilled stopes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2020年第8期27卷 1054-1064页

作者： Xu Zha. andy Fourie Rya. Veenstra.Chong-chong Qi School of Civil Environmental and Mining EngineeringUniversity of Western AustraliaCrawley WA 6009Australia Newmont Corpora.ion Subiaco WA 6008Australia School of Resources a.d Sa.ety Engineering Central South UniversityChangsha 410083China

In underground mining,there ha. been a. increa.ing use of"cemented pa.te"for the ba.kfilling of *** this cemented pa.te ba.kfill(CPB)enters the stope a. a.fluid,shotcrete ba.rica.es a.e often used to reta.n the fill ma.eria. during a.d a.ter the filling ***,fa.lures of ba.rica.es ha.e been reported a.ound the world in recent *** pa.er presents a. a.a.ytica. solution ba.ed on the ela.tic thin pla.e theory for ca.ibra.ing the design of shotcrete ba.rica.es in underground mines using *** solution wa. used to determine the qua.tita.ive rela.ionships between the la.era. loa.ing from the pa.te a.d the ba.rica.e response during the ba.kfilling *** results show tha. the proposed solution a.rees well with in situ *** to the a.tua. ba.rica.e responses,the a.cepta.le tensile stress a.d a. a.a.ysis method of cra.ks development a.e *** proposed solution ha. pra.tica. significa.ce for underground mines.

关键词： cemented pa.te ba.kfill ba.rica.e ela.tic thin pla.e theory mine sa.ety in situ mea.urement

Wa.er–solid conta.t electrifica.ion a.d ca.a.ysis a.justed by surfa.e functiona. groups

在线全文

学校读者我要写书评

暂无评论

Na.o Resea.ch 2024年第4期17卷 3344-3351页

作者： Yusen Su andy Berbille Zhong Lin Wa.g Wei Ta.g Ca. Center for Excellence in Na.oscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing100083China School of Na.oscience a.d Technology University of Chinese Academy of SciencesBeijing100049China Georgia.Institute of Technology AtlantaGA 30332-0245USA

Chemica. functiona. groups on solid surfa.es grea.ly influence conta.t electrifica.ion(CE)a. wa.er–solid *** studies of their effects ma.nly swa.ped ma.eria.s or bonded rela.ed molecules to a.substra.e,introducing other fa.tors of *** work a.ms a. una.biguously demonstra.ing the role of functiona. groups in wa.er-polymer *** study the contribution of functiona. groups,by using ion coupled pla.ma.etching to modify a.high-density polyethylene(HDPE)film,a.polymer with a.na.ura.ly qua.i-null cha.ge tra.sfer ***(HDPE–F)a.d hydroxyl(HDPE–OH)functiona. groups a.e genera.ed a.d endowed HDPE with cha.ge withdra.ing ***–F withdra.s 2.5–2.7 times more cha.ges tha. HDPE–***,the surfa.e cha.ges a.cumula.ed genera.e electrosta.ic forces,a.tering the droplets *** phenomenon provides a.other a.proa.h to study CE,helping to eva.ua.e the contribution of electrons to solid–liquid ***,employing HDPE–F to perform conta.t-electro-ca.a.ysis shows its a.tivity is 2.4 times higher tha. tha. of commercia. fluorina.ed films.

关键词： conta.t-electro-ca.a.ysis cha.ge tra.sfer solid–liquid interfa.es conta.t electrifica.ion