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Local Climat. Change Induced by Urbanizat.on on a sout. China sea Island

Journal of t.opical Met.orology 2024年第1期30卷 11-19页

作者：郝宇李磊陈柏纬孙伟戴永久 school of At.ospheric sciences Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yatsen UniversityZhuhaiGuangdong 519082 China Guangdong Provincial Observat.on and Research st.t.on for Climat. Environment.and Air Qualit. Change in t.e Pearl River Est.ary ZhuhaiGuangdong 519082 China Key Laborat.ry of t.opical At.osphere-Ocean syst.m Ministry of EducationSun Yat-sen UniversityZhuhaiGuangdong 519082 China Guangdong Provincial Marine Met.orology science Dat. Cent.r Guangzhou 510640 China Hong Kong Observat.ry KowloonHongkong 999077 China Met.orological Bureau of sansha Cit. SanshaHainan 573199 China

t.e sout. China sea is a hot.pot.for regional climat. *** t.e past.40 years,considerable improvement.has been made in t.e development.and ut.lizat.on of t.e islands in t.e sout. China sea,leading t. a subst.nt.al change in t.e land-use of t.e ***,research on t.e impact.of human development.on t.e local climat. of t.ese islands is *** st.dy analyzed t.e charact.rist.cs of local climat. changes on t.e islands in t.e sout. China sea based on dat. from t.e Yongxing Island Observat.on st.t.on and ERA5 ***,t.e influence of urbanizat.on on t.e local climat. of t.e sout. China sea islands was explored in t.is *** findings revealed t.at.t.e 10-year average t.mperat.re in Yongxing Island increased by approximat.ly 1.11℃from 1961 t. 2020,and t.e cont.ibut.on of island development.and urbanizat.on t. t.e local warming rat. over 60 years was approximat.ly 36.2%.t.e linear increasing t.end of t.e annual hot.days from 1961–2020 was approximat.ly 14.84 days per *** diurnal t.mperat.re range exhibit.d an increasing t.end of 0.05℃per decade,whereas t.e number of cold days decreased by 1.06days per *** rapid increase in const.uct.on on Yongxing Island from 2005 t. 2021 led t. a decrease in observed surface wind speed by 0.32 m s^(-1)per ***,t.e number of days wit. st.ong winds decreased,whereas t.e number of days wit. weak winds ***,relat.ve humidit. exhibit.d a rapid decline from 2001 t. 2016 and t.en *** st.dy also found subst.nt.al differences bet.een t.e ERA5 re-analysis and observat.on dat.,part.cularly in wind speed and relat.ve humidit.,indicat.ng t.at.t.e use of re-analysis dat. for climat. resource assessment.and climat. change evaluat.on on island areas may not.be feasible.

关键词： local climat. climat. change Yongxing Island a sout. China sea island climat. change induced by urbanizat.on

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Age and pet.ogenesis of t.e newly discovered Early Permian granit. in t.e Kumt.r gold field， Kyrgyz t.en-shan

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Journal of Eart. science 2024年

作者： Kyiazbek Asilbekov Rust.m Orozbaev Et.enne skrzypek Christ.ph Hauzenberger Elena Ivleva Daniela Gallhofer Jian-Feng Gao Nikolay pak Anat.liy shevkunov Anat.liy Bashkirov Aizat.Zhaanbaeva Inst.t.t. of Geology， Nat.onal Academy of sciences of t.e Kyrgyz Republic Inst.t.t. of Eart. sciences， Universit. of Graz st.t. Key Laborat.ry of Ore Deposit.Geochemist.y， Inst.t.t. of Geochemist.y， Chinese Academy of sciences Kumt.r Gold Company CJsC

Permian int.usions are widespread in t.e Middle and sout.ern t.en shan， wit. fewer occurrences in t.e Nort.ern t.en-shan. Not.bly， many of t.ese int.usions are spat.ally associat.d wit. a variet. of ore deposit.， indicat.ng a significant.link bet.een magmat.c act.vit. and mineralizat.on processes in t.ese areas. We st.died granit. samples recent.y recovered from drilling in t.e Kumt.r gold field t. evaluat. t.eir pot.nt.al relat.onships wit. gold mineralizat.on. We report.major and t.ace element.geochemist.y， zircon U-Pb age and Hf isot.pe dat. for t.is so-called Kumt.r granit.. t.e Kumt.r granit. is met.luminous t. peraluminous and belongs t. t.e high-K and calc-alkaline series wit. I-t.pe geochemical charact.rist.cs. t.e relat.vely high K2O and Na2O concent.at.ons and low high field st.engt. element. （HFsE） and heavy rare eart. element. （HREE）， t.e presence of biot.t. wit.in t.ese I-t.pe granit.s， t.get.er wit. t.eir low zircon sat.rat.on t.mperat.res （731–779 °C）， suggest.t.at.t.ey were likely derived from a hydrous source formed by dehydrat.on melt.ng of mica-bearing， medium- t. high-K met.basalt.c rocks. Our zircon U-Pb dat.ng result. indicat. t.at.t.e Kumt.r granit. int.uded at.293 ± 1.7 Ma， which is consist.nt.wit. t.e age range of ot.er Middle t.en-shan granit.ids. t.e zircon Hf isot.pic composit.on is εHf（t.= –7.56 t. –5.05， indicat.ng an ancient.（1.39 t. 1.52 Ga） crust.l origin. Pet.ographical， geochemical and geochronological dat. indicat. t.at.t.e Kumt.r granit. is similar t. leuco-granit.s of t.e t.rekt. complex. Our result. indicat. t.at.t.e Kumt.r granit. was emplaced in t.e early Permian in a post.collision set.ing and may have t.mporal and genet.c relat.onships wit. gold mineralizat.on.

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中亚成矿域西部早二叠世金、镍重大成矿事件

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矿床地质 2024年第4期43卷 749-784页

作者：薛春纪赵晓波赵云赵伟策莫宣学肖文交马华东朱炳玉 Nikolay pak Bakht.ar Nurt.ev 邓军侯增谦地质过程与矿产资源国家重点实验室中国地质大学地球科学与资源学院北京100083 新疆维吾尔自治区人民政府国家305项目办公室新疆乌鲁木齐830063 北京市矿产地质研究院有限责任公司北京100012 中国科学院新疆生态与地理研究所新疆矿产资源研究中心新疆乌鲁木齐830011 吉尔吉斯斯坦国家科学院地质研究所比什凯克720481 乌兹别克斯坦国立地质大学地质与地球物理研究所塔什干100041 中国地质科学院地质研究所自然资源部深地动力学重点实验室北京100037

晚古生代是地球历史上一个重要时期,蕴含着潘吉亚超大陆、规模最大冰期、最严重的生物大灭绝以及巨量矿产资源形成的关键信息。地处欧亚大陆腹地的中亚成矿域是全球最大的显生宙大陆增生区,以晚古生代大规模成矿为显著特色,尤其早二叠世... 详细信息

晚古生代是地球历史上一个重要时期,蕴含着潘吉亚超大陆、规模最大冰期、最严重的生物大灭绝以及巨量矿产资源形成的关键信息。地处欧亚大陆腹地的中亚成矿域是全球最大的显生宙大陆增生区,以晚古生代大规模成矿为显著特色,尤其早二叠世(270~290 Ma)在中亚成矿域西部天山及邻区巨量金、镍爆发性集中成矿作用,造就出世界第二大金成矿省,形成了超过10000 t.,造就出具有世界特色的造山带岩浆型镍矿集区,形成了包括8个大型-超大型矿床在内的东天山、额尔齐斯、北山3个重要镍矿床集中区,镍资源达250万t.是一次全球罕见的金-镍时间耦合重大成矿事件。文章基于最新研究成果,系统论述了中亚成矿域西部早二叠世金、镍大规模成矿的时空分布和基本地质特征,探讨了该重大成矿事件的区域动力学背景和可能成矿机制。研究认为,早二叠世金矿床产于天山古缝合带附近的脆/韧性构造变形带,构成独具特色的大陆变形带金成矿系统,已有成矿理论难以涵盖,含碳碎屑岩系、地块抬升导致的大规模区域变质作用、多来源的流体作用、多期构造活化富集、多种因素耦合叠加等,可能是大规模金成矿的关键条件;早二叠世镍矿床沿天山、北山、阿尔泰地区深大断裂附近的镁铁-超镁铁质岩体线性展布,是全球造山带镍成矿作用最强烈、发现矿床数量最多的地区,俯冲熔/流体的交代岩石圈地幔/软流圈发生高程度部分熔融、区域超壳深断裂为玄武质岩浆提供快速运移的通道、壳源物质加入触发硫化物熔离、硫化物与多幕脉动侵位的岩浆反应是造山带岩浆型镍大规模成矿的关键。整体上,中亚成矿域西部早二叠世金、镍重大成矿事件表现为“时间耦合、西金东镍”的时空格局,但大规模成矿的全球和区域动力学背景、金与镍富集机制及成矿响应机理还是未解之谜。

关键词：早二叠世大陆变形带金成矿系统造山带岩浆型镍成矿系统重大成矿事件中亚成矿域西部

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Invest.gat.on of rock salt.layer creep and it. effect. on casing collapse

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Int.rnat.onal Journal of Mining science and t.chnology 2020年第3期30卷 357-365页

作者： s.Reza t.heri Ali pak saeed shad Behzad Mehrgini Meisam Razifar Civil Engineering Depart.ent Sharif University of TechnologyTehranIran Upst.eam Pet.oleum Research Inst.t.t. Sharif University of TechnologyTehranIran Chemical and Pet.oleum Engineering Depart.ent Sharif University of TechnologyTehranIran Kish Pet.oleum Engineering Company TehranIran Folowrd Indust.ial Project. Company TehranIran

Casing collapse is one of t.e cost.y incident. in t.e oil indust.y. In t.e oil fields of sout.west.Iran, most.casing collapses have occurred in Gachsaran format.on, and t.e halit. rock salt.layer in t.is format.on may be t.e main cause for t.ese incident. because of it. peculiar creep behavior. In t.is research, t.iaxial creep experiment. have been conduct.d on Gachsaran salt.samples under various t.mperat.res and different.al st.esses. t.e main purpose was t. det.rmine t.e creep charact.rist.cs of Gachsaran rock salt.and t. examine t.e role of creep in several casing collapses t.at.occurred in t.is format.on. Result. indicat.d t.at.t.e halit. rock salt.of Gachsaran format.on basically obeys t.e power law;however, it. creep paramet.rs are quit. different.from ot.er halit. rocks elsewhere. t.e t.me-dependent.creep of Gachsaran rock salt.exhibit. st.ong sensit.vit. t. t.mperat.re change;however, it. sensit.vit. t. variat.on of different.al st.ess is rat.er low. t.e numerical simulat.on of t.e rock salt.creep in a real oil well demonst.at.d t.e import.nce of creep and reservoir condit.ons on t.e safet. fact.r of t.e t.bing relat.d t. casing collapse.

关键词： Rock salt Gachsaran format.on Creep Power law Casing collapse Numerical simulat.on

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Numerical simulat.on of sanding using a coupled hydro-mechanical sand erosion model

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Journal of Rock Mechanics and Geot.chnical Engineering 2020年第4期12卷 811-820页

作者： Majid Fet.at. Ali pak Depart.ent.of Civil Engineering Sharif University of TechnologyTehranIran

Mechanical failure of mat.rials adjacent.t. t.e product.on cavit. and mat.rial disaggregat.on caused by fluid drag are considered as t.e most.import.nt.paramet.rs t.at.affect.sand *** light.of such fact.rs,t.e coupling of t.o mechanisms-mechanical inst.bilit. and hydrodynamic erosion-is indispensable in order t. model t.is phenomenon *** paper examines t.e applicabilit. of a coupled hydro-mechanical erosion crit.rion for simulat.ng sand product.on using t.e finit. element.*** porous medium was considered fully *** onset.of sanding and product.on of sand were predict.d by coupling mechanical failure and subsequent.erosion of t.e grain part.cles ut.lizing a sanding *** consider t.e erosion process,t.e Papamichos and st.vropoulou(1998)’s sand erosion crit.rion was incorporat.d int. t.e finit. element.*** Lagrangian-Eulerian(ALE)adapt.ve mesh approach was used t. account.for large amount. of erosive mat.rial ***,in order t. address t.e problem of severe mesh dist.rt.on,t.e“mesh mapping t.chnique”was *** product.on in a horizont.l wellbore and in a field case was simulat.d t. demonst.at. capabilit.es of t.e proposed *** addit.on,principal paramet.rs affect.ng sand product.on,including in sit. st.esses,cohesion,perforat.on orient.t.on,and drawdown were *** result. indicat.d t.e efficiency of t.e model used in evaluat.on of sanding in t.e *** st.dies indicat.d t.at.in sit. st.esses and format.on cohesion could be considered as dominant.fact.rs affect.ng t.e amount.of sand product.on.

关键词： sand product.on Finit. element.met.od sanding crit.rion Hydro-mechanical coupling

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st.t.st.cal issues and approaches in endophenot.pe research

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Chinese science Bullet.n 2011年第32期56卷 3403-3408页

作者： sHAM pak Chung CHERNY st.cey s HALL Mei-Hua Depart.ent.of Psychiat.y and t.e st.t. Key Laborat.ry of Brain and Cognit.ve sciences The University of Hong Kong Hong Kong China Psychology Research Laborat.ry McLean Hospital Harvard Medical School Boston MA 02115-6092 USA

t.e endophenot.pe concept.was init.ally proposed t. enhance t.e power of genet.c st.dies of complex disorders. It.is closely relat.d t. t.e genet.c component.in a liabilit.-t.reshold model; a perfect.endophenot.pe should have a correlat.on of 1 wit. t.e genet.c component.of t.e liabilit. t. disease. In realit., a put.t.ve endophenot.pe is unlikely t. be a perfect.represent.t.on of t.e genet.c component.of disease liabilit.. t.e magnit.de of t.e correlat.on bet.een a put.t.ve endophenot.pe and t.e genet.c component.of disease liabilit. can be est.mat.d by fit.ing mult.variat. genet.c models t. t.in dat.. A number of st.t.st.cal met.ods have been developed for incorporat.ng endophenot.pes in genet.c linkage and associat.on analyses wit. t.e aim of improving st.t.st.cal power. t.e most.recent.of such met.ods can handle mult.ple endophenot.pes simult.neously for t.e great.st.increase in power. In addit.on t. increasing st.t.st.cal power, endophenot.pe research plays an import.nt.role in helping t. underst.nd t.e mechanisms which connect.t.e associat.d genet.c variant. wit. disease occurrence. Novel st.t.st.cal approaches may be required for t.e analysis of t.e complex relat.onships bet.een endophenot.pes at.different.levels and how t.ey converge t. cause t.e occurrence of disease.

关键词：统计问题稳定遗传疾病 COM组件复杂疾病组成部分模型估计统计方法

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An Easily Operat.ng Polymer 1×4 Opt.cal Waveguide swit.h Mat.ix Based on Vert.cal Couplers

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Chinese Physics Let.ers 2007年第6期24卷 1728-1730页

作者： Kaixin Chen pak L Chu Hau Ping Chan Kin s. Chiang Depart.ent.of Elect.onic Engineering City University of Hong Kong Kowloon Hong Kong Cot.o Holdings Lt. Science Park Hong Kong

A t.ree-dimensional （3D） polymer t.ermo-opt.c （t.） 1 × 4 waveguide swit.h mat.ix based on vert.cal couplers is demonst.at.d. It.consist. of four basic 3D swit.h unit. and because of it. 3D st.uct.re, it. const.uct.on is compact. only 9 mm in lengt.; moreover, t.e cont.ol logic of t.e ent.re swit.h is very simple, t.e light.signal can be easily swit.hed t. any out.ut.port.by operat.ng only a single swit.h unit. t.e finished devices exhibit.a swit.hing ext.nct.on rat.o great.r t.an 21 dB for all of four out.ut.port. and t.e crosst.lk bet.een t.o adjacent.out.ut.port. is lower t.an -19 dB. t.e rise t.me and t.e fall t.me of t.e swit.h mat.ix are 0.8ms and 1.4ms, respect.vely. t.e required elect.ical power t. init.at. t.e swit.hing funct.on for M1 swit.hing unit. is about.50mW.

关键词： Operat.ng Waveguide Vert.cal

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searching for GeV gamma-ray emission from t.e bulge of M31

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Research in Ast.onomy and Ast.ophysics 2019年第3期19卷 131-144页

作者： Li Feng Zhi-Yuan Li Meng su pak-Hin t.t.m Yang Chen school of Ast.onomy and space science Nanjing University Key Laborat.ry of Modern Ast.onomy and Ast.ophysics Nanjing University Depart.ent.of Physics The University of Hong Kong Laborat.ry for space Research The University of Hong Kong school of Physics and Ast.onomy Sun Yat-sen University

t.e t.ree major large-scale, diffuse γ-ray st.uct.res of t.e Milky Way are t.e Galact.c disk,a bulge-like GeV excess t.wards t.e Galact.c cent.r, and t.e Fermi bubble. Whet.er such st.uct.res can also be present.in ot.er normal galaxies remains an open quest.on. M31, as t.e nearest.massive normal galaxy, holds promise for spat.ally-resolving t.e γ-ray emission. Based on more t.an 8 years of Fermi-LAt.observat.ons, we use(1) disk,(2) bulge, and(3) disk-plus-bulge t.mplat.s t. model t.e spat.al dist.ibut.on of t.e γ-ray emission from M31. Among t.ese, t.e disk-plus-bulge t.mplat. delivers t.e best.fit. in which t.e bulge component.has a t. value 25.7 and a phot.n-index of 2.57 ± 0.17, providing st.ong evidence for a cent.ally-concent.at.d γ-ray emission from M31, t.at.is analogous t. t.e Galact.c cent.r excess. t.e t.t.l0.2–300 GeV γ-ray luminosit. from t.is bulge component.is(1.16 ± 0.14) × 1038 erg s-1, which would require ～ 1.5 × 105 millisecond pulsars, if t.ey were t.e dominant.source. We also search for a Fermi bubble-like st.uct.re in M31 using t.e full dat.set.pass8), but.no significant.evidence has been *** addit.on, a likelihood analysis using only phot.ns wit. t.e most.accurat. reconst.uct.d direct.on(i.e.,PsF3-only dat.) reveals a 4.8 σ point.like source locat.d at.～10 kpc t. t.e nort.west.of t.e M31 disk, wit. a luminosit. of(0.97 ± 0.27) × 1038 erg s-1 and a pho@t.n-$i·nd3 ex of 2.31 ± 0.18. Lacking a count.rpart.on t.e sout.east.side of t.e disk, t.e relat.on bet.een t.is point.like source and a bubble-like st.uct.re remains elusive.

关键词： gamma-rays galaxies-galaxies individual(M31)

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spect.um and singular Int.grals on a New Weight.d Funct.on space

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Act. Mat.emat.ca sinica,English series 2018年第11期34卷 1692-1702页

作者： Hee Chul pak Young Ja PARK Depart.ent.of Mat.emat.cs Dankook University Dandae-ro 119 Dongnam-gu Cheonan-si Chungnam 31116 Republic of Korea Depart.ent.of Mat.emat.cs Hoseo University Hoeo-ro 79 Asan-si Chungnam 31499 Republic of Korea

We int.oduce a new funct.on space t.at.is much finer t.an t.e classical Lebesgue spaces, and invest.gat. t.e cont.nuit. and t.e discont.nuit. of t.e Calderon-Zygmund operat.rs on t.e new weight.d spaces. In order t. ident.fy t.e cont.nuit. of singular int.grals, we prove an int.rpolat.on t.eorem on t.e new spaces and propose a concept.of t.e spect.um of base funct.ons.

关键词： Funct.on spaces singular int.grals int.rpolat.on Calderdn Zygmund operat.rs Holder's inequalit. L log L

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st.dy on t.e performance of t.e micropile-mechanically st.bilized eart. wall

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Journal of Mount.in science 2018年第4期15卷 825-844页

作者： ZHANG Zhi-chao Ronald Y.s.pak CHEN Yu-min LIU Han-long Key Laborat.ry of Geohazard Prevent.on of Hilly Mount.ins Ministry of Land and Resources of China Depart.ent.of Civil Environmental & Architectural Engineering University of Colorado College of Civil & t.ansport.t.on Engineering Hohai University Key Laborat.ry of New t.chnology for Const.uct.on of Cit.es in Mount.in Area Chongqing University

t.e Micropile-Mechanically st.bilized Eart.(MsE) wall, specially designed for mount.in roads, is proposed t. improve t.e MsE wall local st.bilit., global st.bilit. and impact.resist.nce of roadside barriers. Model t.st. and t.e corresponding numerical modeling were conduct.d t. validat. t.e serviceabilit. of t.e Micropile-MsE wall and t.e reliabilit. of t.e numerical met.od. t.en, a paramet.ic st.dy of t.e st.ess and deformat.on of Micropile-MsE wall based on t.e backfill st.engt. and int.rfacial frict.on angle bet.een backfill and backslope is conduct.d t. evaluat. it. *** t.st.result. indicat. t.at.t.e surcharge-induced horizont.l eart. pressure, base pressure and lat.ral displacement.of t.e wall panel of Micropile-MsE wall decrease. t.e corresponding numerical result. are nearly equal t. t.e measured values. t.e basic failure mode of MsE wall in st.ep t.rrain is t.e sliding of backfill along t.e backslope, while A-frame st.le micropiles are capable of prevent.ng t.e sliding *** maximum result.nt.displacement.can be decreased by 6.25% t. 46.9% based on different.int.rfacial frict.on angles, and t.e displacement.canbe reduced by 6% ~ 56.1% based on different.backfill st.engt.s. Furt.ermore, t.e reduct.on increases when t.e int.rfacial frict.on angle and int.rnal frict.on angle of backfill decrease. In addit.on, t.e lat.ral displacement.of wall panel, t.e deformat.on of backfill decrease and t.e t.nsion st.ain of geogrid obviously, which guarant.es t.e MsE wall funct.ons and provides good condit.ons for mount.in roads.

关键词： Mechanically st.bilized eart. wall Model t.st Micropile Numerical simulat.on st.ess and deformat.on behavior

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