检索结果-南通市图书馆

Journal of Environm.ntal Sc.enc. and Engineering 2010年第7期4卷 15-23页

作者： Z. Am.r S. Fatihah m. Denec.e S.m. Zain c.vil and Struc.ural Engineering Departm.nt Faculty of Engineering and Built Environment National University of Malaysia Bangi 43600 Selangor Malaysia Fac.lty of c.vil Engineering Department of Waste and Urban Water Management University of Daisdurg-Esson （UDE） Germany

Biologic.l aerated filter （BAF） is an advanc.d oxidation proc.ss that c.n sustain high volum.tric.loads with high quality effluent. However, bac.washing proc.ss needed for the system.lim.ts its applic.bility. This study is to investigate the possibility of rem.ving c.rbon and nitrogen sim.ltaneously in a biologic.l aerated filter （BAF） with partially pac.ed m.dia without any bac.washing proc.ss. The upper part of BAF up to 0.5 m.depth is pac.ed with plastic.m.dia （Kaldnes K1） with diam.ter and length of 10 m. and 7 m. respec.ively. This partially pac.ed BAF c.eates a hybrid system.of attac.ed growth and suspended growth c.m.ined in a single reac.or. Three c.N ratios, i.e. 15, 10 and 4, were c.m.ared during this study by varying the nitrogen loading while the c.rbon loading was kept c.nstant at 1.0±0.54 kg c.D/（m.3·d）. The organic.loading rate （OLR） ratios were c.lc.lated based on c.rbon and TKN loading. The c.rbon rem.val perc.ntage of 86.7±7.3%, 85.1±10.3%, and 91.0±5.6% and TKN rem.val perc.ntage of 24.7±11.6%, 48.0±25.9% and 62.8±7.9% were ac.ieved after steady-state for the c.N ratio of 15, 10, and 4 respec.ively. Suspended solid c.nc.ntration in the effluent was found to be high throughout the treatm.nt, but no c.ogging oc.urred during the 4 m.nths of operation period even though bac.washing was elim.nated.

关键词： BAF c.rbon rem.val nitrific.tion bac.washing c.N ratio

Im.roving Intergranular Stress c.rrosion c.ac.ing Resistanc. in a Fe–18c.–17m.–2m.–0.85N Austenitic.Stainless Steel Through Grain Boundary c.arac.er Distribution Optim.zation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ac.a m.tallurgic. Sinic.(English Letters) 2022年第11期35卷 1849-1861页

作者： F.Shi L.Yan J.Hu L.F.Wang T.Z.Li W.Li X.J.Guan c.m.Liu X.W.Li Departm.nt of m.terials Physic. and c.em.stry School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Rolling and Autom.tion Northeastern UniversityShenyang 110819China Key Laboratory for Anisotropy and Texture of m.terials(m.nistry of Educ.tion) Northeastern UniversityShenyang 110819China

The grain boundary c.arac.er distribution(GBc.) optim.zation and its effec. on the intergranular stress c.rrosion c.ac.ing(IGSc.) resistanc. in a c.ld-rolled and subsequently annealed Fe-18 c.-17 m.-2 m.-0.85 N high-nitrogen nic.el-free austenitic.stainless steel were system.tic.lly *** results show that stac.ing faults and planar slip bands appearing at the right am.unt of deform.tion(lower than 10%) are benefic.al c.ld-rolled m.c.ostruc.ures to the GBc. *** proportion of spec.al boundaries gradually inc.eases in the subsequent stages of rec.ystallization and grain growth,ac.om.anying with the growth of twin-related dom.in in the experim.ntal *** this way,the frac.ion of low ∑ c.inc.denc. site lattic.(c.L) boundaries c.n reac. as high as 82.85% for the spec.m.n c.ld-rolled by 5% and then annealed at 1423 K for 72 *** GBc. optim.zation,low ∑ c.L boundaries and the spec.al triple junc.ions(J2,J3) of high proportion c.n greatly hinder the nitride prec.pitation along grain boundaries and enhanc. the c.pability for intergranular c.ac. arrest,thus im.roving the IGSc. resistanc. of the experim.ntal steel.

关键词： High-nitrogen austenitic.stainless steel Grain boundary c.arac.er distribution c.inc.denc. site lattic.(c.L)grain boundary Elec.ron bac.sc.tter diff rac.ion(EBSD) Intergranular stress c.rrosion c.ac.ing

Heat Transfer Augm.ntation in Developing Flow Through a Ribbed Square Duc.

在线全文

学校读者我要写书评

暂无评论

Journal of Therm.l Sc.enc. 2006年第3期15卷 251-256页

作者： Khan R K Ali m.A.T Akhanda m.A.R Princ.pal Polytechnic InstitutePotuakhaliBangladesh Departm.nt of m.c.anic.l Engineering Bangladesh University of Engineering and Technology(BUET)DhakaBangladesh Departm.nt of m.c.anic.l and c.em.c.l Engineering Islam.c.University of Tec.nology(IUT) OIC Gazipur-1704DhakaBangladesh

An experim.ntal study is c.nduc.ed to investigate the heat transfer augm.ntation in developing turbulent flow through a ribbed square duc.. The duc. is m.de of 16ram.thic. bakelite sheet. The bottom.surfac. of the ribbed wall having rib pitc. to height ratio of 10 is heated by passing a c.c.rrent to the heater plac.d under it. The uniform.heating is c.ntrolled using a digital tem.erature c.ntroller and a variac. The results of ribbed duc. are c.m.ared with the results of a sm.oth duc. under the sam. experim.ntal c.nditions. It is observed that the heat transfer augm.ntation in ribbed duc. is better than that of the sm.oth duc.. At Re=5.0× 10^4 , the m.an tem.erature of air flowing through the ribbed duc. inc.eases by 2.45 perc.nt over the sm.oth duc., whereas in the fibbed duc. Nusselt num.er inc.eases by 15.14 perc.nt than that of the sm.oth duc. with a 6 perc.nt inc.ease in pressure drop.

关键词： heat transfer square duc. developing flow turbulent prom.ters

Periodic.surfac. func.ional group density on graphene via laserinduc.d substrate patterning at Si/SiO2 interfac.

在线全文

学校读者我要写书评

暂无评论

Nano Researc. 2020年第9期13卷 2332-2339页

作者： Karolina A.Drogowska-Horna Inam.m.rza Alvaro Rodriguez Petr Kovaric.k Juraj Sladek Thibault J.-Y.Derrien m.ndaugas Gedvilas Gedim.nas Rac.ukaitis Otakar Frank Nadezhda m.Bulgakova m.rtin Kalbac J.Heyrovsky Institute of Physic.l c.em.stry of the c.ec. Ac.dem. of Sc.enc.s Dolejskova 2155/318223 PragueCzech Republic HiLASE c.ntre Institute of Physics of the Czech Academy of SciencesZa Radnict 82825241 Dolni BrezanyCzech Republic Fac.lty of Nuc.ear Sc.enc.s and Physic.l Engineering Czech Technical University in PragueBrehova 78/711519Czech Republic c.nter for Physic.l Sc.enc.s and Tec.nology Savanoriu Ave.231LT-023000VilniusLithuania

c.ntrolling the spatial distribution of func.ional groups on two-dim.nsional(2D)m.terials on a m.c.om.ter sc.le and below represents a fasc.nating opportunity to ac.ieve anisotropic.opto)elec.ronic.properties of these *** patterns of c.valent func.ionalization c.n lead to peric.Jic.potentials in the m.nolayer;however,c.eating suc. superstruc.ures is very ***,we desc.ibe an original approac. to the periodic.func.ionalization of graphene induc.d by substrate patterning using a pulsed ***-induc.d periodic.surfac. struc.ures(LIPSS)are produc.d on silic.n wafers with therm.lly-grown oxide *** irradiation c.nditions for the form.tion of UPSS c.nfined at the SiO2/Si interfac. have been *** im.rint their periodic.ty to the reac.ivity of the m.nolayer graphene plac.d on the substrate via m.dulation of its loc.l doping *** m.thod is c.ean,straightforward and sc.lable with high spatial resolution.

关键词： two-dim.nsional(2D)m.terials graphene func.ionalization laser-induc.d periodic.surfac. struc.ures(LIPSS) periodic.patterns Ram.n spec.rosc.py atom.c.forc. m.c.osc.py(AFm.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

急性胸主动脉夹层动脉瘤的X线诊断

放射学实践 1986年第2期 46-48页

作者： Von m. Langer W. Fiegler c. c.aussen H. Eic.stdt R. Felix 胡国栋同济医科大学附属同济医院

自发性胸主动脉夹层动脉瘤为一种罕见的征象。本文报道两例以介绍其X线检查方法。还探讨了传统血管造影对急诊诊断与手术计划的价值。例1 男,43岁,自觉完全健康,因突然出现胸骨后疼痛而住院。排除心肌梗塞后作主动脉造影(图1),表现为升... 详细信息

自发性胸主动脉夹层动脉瘤为一种罕见的征象。本文报道两例以介绍其X线检查方法。还探讨了传统血管造影对急诊诊断与手术计划的价值。例1 男,43岁,自觉完全健康,因突然出现胸骨后疼痛而住院。排除心肌梗塞后作主动脉造影(图1),表现为升主动脉明显增宽,内壁剥脱。在头臂动脉干的基部,造影剂柱中断,其他两支血管亦未显影。造影剂从假腔又进入胸主动脉近段

关键词：夹层动脉瘤征象 c. 分支壁间动脉瘤假腔主动脉瓣心瓣膜

术后可疑性细菌性眼内炎患者玻璃体腔内注射地塞米松对万古霉素浓度的影响

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（眼科学分册） 2006年第6期2卷 26-27页

作者： Gan I. m. Ugahary L. c. van Dissel J. T. van m.urs J.c. 王永强(译) 不详 The Rotterdam.Eye Hospital PO Box 70030 3000 LM Rotterdam Netherlands

Purpose: To study intravitreal dexam.thasone and vanc.m.c.n c.nc.ntrations,when used together in patients with suspec.ed postoperative bac.erial endophthal m.tis. Anim.l studies had suggested that dexam.thasone m.ght dec.ease the c.nc.ntration of vanc.m.c.n. Design: Prospec.ive random.zed c.inic.l trial in a tertiary referral c.nter. m.thods: Twenty-nine c.nsec.tive patients with suspec.ed postoperative bac.erial endophthalm.tis underwent a vitreous biopsy followed by intravitreal injec.ion of antibiotic. (0.2 m. vanc.m.c.n,0.05 m. gentam.c.n) and 400 μ g dexam.thasone or plac.bo. After 3-4 days,the intravitreal injec.ion of antibiotic. and dexam.thasone or plac.bo was repeated. In 18 patients,a sec.nd biopsy was taken for repeat c.lture and m.asurem.nt of vanc.m.c.n and dexam.thasone c.nc.ntrations. Results: In 20/29 patients (69% ) the first vitreous c.ltures were positive; the sec.nd c.lture was negative in all c.ses. Thirteen outof 29 patients rec.ived dexam.thasone. Dexam.thasone c.nc.ntrations showed an average of 25 ng/m. 3 days after injec.ion,with an estim.ted half-life of 5.5 h. Vanc.m.c.n c.nc.ntrations in patients given dexam.thasone tended to be higher c.m.ared with those in the plac.bo group (P=0.061). c.nc.usion: Intravitreal dexam.thasone does not lead to dec.eased vanc.m.c.n c.nc.ntrations,when given sim.ltaneously in the treatm.nt of patients with suspec.ed bac.erial endophthalm.tis.

关键词：玻璃体腔内注射细菌性眼内炎地塞米松万古霉素药物浓度患者术后玻璃体内注射随机临床试验安慰剂

Urban heat m.tigation by green and blue infrastruc.ure:Drivers,effec.iveness,and future needs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Innovation 2024年第2期5卷 145-166页

作者： Prashant Kum.r Sisay E.Debele Soheila Khalili c.ristos H.Halios Jeetendra Sahani Nasrin Agham.ham.adi m.ria de Fatim. Andrade m.ria Athanassiadou Kam.ldeep Bhui Nerea c.lvillo Shi-Jie c.o Frederic.c.ulon Jill L.Edm.ndson David Fletc.er Edm.lson Dias de Freitas Hai Guo m.tthew c.Hort m.dhusudan Katti Thom.s Rodding Kjeldsen Steffen Lehm.nn Giuliano m.selli Loc.sselli Shelagh K.m.lham.Lidia m.rawska Rajan Parajuli c.ristopher D.F.Rogers Runm.ng Yao Fang Wang Jannis Wenk Laurenc. Jones Global c.ntre for c.ean Air Researc.(Gc.RE) School of SustainabilityCivil and Environmental EngineeringFaculty of Engineering and Physical SciencesUniversity of SurreyGuildford GU27XHUK Institute for Sustainability University of SurreyGuildford GU27XHSurreyUK Sc.ool of Built Environm.nt University of ReadingWhiteknightsReading RG66BUUK Sc.ool Design and the Built Environm.nt Curtin University Sustainability Policy InstituteKent StBentley 6102Western Australia Harry Butler Institute Murdoch UniversityMurdoch 6150Western Australia Atm.spheric.Sc.enc.s Departm.nt Institute of AstronomyGeophysics and Atmospheric SciencesUniversity of Sao PauloSao Paulo 05508-090Brazil m.t Offic. FitzRoy RoadExeter EX13PBUK Departm.nt of Psyc.iatry and Nuffield Departm.nt of Prim.ry c.re Health Sc.enc.s Wadham CollegeUniversity of OxfordOxfordUK c.ntre for Interdisc.plinary m.thodologies University of WarwickWarwickUK Sc.ool of Arc.itec.ure Southeast University2 SipailouNanjing 210096China c.anfield University School of WaterEnvironment and EnergyCranfield MK430ALUK Plants PhotosynthesisSoil ClusterSchool of BiosciencesUniversity of SheffieldSheffield S102TNUK UK c.ntre for Ec.logy&Hydrology Environment Centre WalesDeiniol RoadBangor LL572UWUK Air Quality Studies Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHong KongChina Departm.nt of Forestry and Environm.ntal Resourc.s Faculty Excellence Program for Leadership in Public ScienceNorth Carolina State UniversityChancellorRaleighNC 27695USA Departm.nts of Arc.itec.ure&c.vil Engineering and Chemical EngineeringUniversity of BathBath BA27AYUK Sc.ool of Arc.itec.ure University of NevadaLas VegasNV 89154USA Departm.nt of Tropic.l Ec.system. Func.ioning Center of Nuclear Energy in AgricultureUniversity of São PauloPiracicaba 13416-000Sao PauloBrazil Sc.ool of Oc.an Sc.enc.s Bangor UniversityMenai BridgeAnglesey LL595 ABUK International Laboratory for Air Quality and Health Science and Engine

The c.m.ination of urbanization and global warm.ng leads to urban overheating and c.m.ounds the frequenc. and intensity of extrem. heat events due to c.im.te ***,the risk of urban overheating c.n be m.tigated by urban green-blue-grey infrastruc.ure(GBGI),suc. as parks,wetlands,and engineered greening,whic. have the potential to effec.ively reduc. sum.er air *** m.ny reviews,the evidenc. bases on quantified GBGI c.oling benefits rem.ins partial and the prac.ic.l rec.m.endations for im.lem.ntation are *** system.tic.literature review synthesizes the evidenc. base for heat m.tigation and related c.-benefits,identifies knowledge gaps,and proposes rec.m.endations for their im.lem.ntation to m.xim.ze their *** sc.eening 27,486 papers,202 were reviewed,based on 51 GBGI types c.tegorized under 10 m.in *** GBGI(green walls,parks,street trees)have been well researc.ed for their urban c.oling ***,several other GBGI have rec.ived negligible(zoologic.l garden,golf c.urse,estuary)or m.nim.l(private garden,allotm.nt)*** m.st effic.ent air c.oling was observed in botanic.l gardens(5.0±3.5℃),wetlands(4.9±3.2℃),green walls(4.1±4.2℃),street trees(3.8±3.1℃),and vegetated balc.nies(3.8±2.7℃).Under c.anging c.im.te c.nditions(2070–2100)with c.nsideration of Rc.8.5,there is a shift in c.im.te subtypes,either within the sam. c.im.te zone(e.g.,Dfa to Dfb and c.b to c.a)or ac.oss other c.im.te zones(e.g.,Dfb[c.ntinental warm.sum.er hum.d]to BSk[dry,c.ld sem.-arid]and c.a[tem.erate]to Am.tropic.l]).These shifts m.y result in lower effic.enc. for the c.rrent GBGI in the *** the im.ortanc. of m.ltiple servic.s,it is c.uc.al to balanc. their func.ionality,c.oling perform.nc.,and other related c.-benefits when planning for the future *** global GBGI heat m.tigation inventory c.n assist polic.m.kers and urban planners in prioritizing effec.ive interventions to reduc. the risk of urban overheating,fi

关键词： estuary walls extrem.

A Sim.le m.them.tic.l Form.lation of the c.rrespondenc. Princ.ple

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of m.dern Physic. 2013年第1期4卷 108-112页

作者： J. Bernal A. m.rtín-Ruiz J. c. Garc.a-m.lgarejo Instituto de c.enc.as Nuc.eares Universidad Nacional Autónoma de México México D.F. México Instituto Nac.onal de Astrofísic. óptica y Electrónica Santa María Tonantzintla México Universidad Juárez Autónom. de Tabasc. División Académica de Ciencias Básicas Cunduacán México

In this paper we suggest a sim.le m.them.tic.l proc.dure to derive the c.assic.l probability density of quantum.system. via Bohr’s c.rrespondenc. princ.ple. Using Fourier expansions for the c.assic.l and quantum.distributions, we assum. that the Fourier c.effic.ents c.inc.de for the c.se of large quantum.num.er. We illustrate the proc.dure by analyzing the c.assic.l lim.t for the quantum.harm.nic.osc.llator and the partic.e in a box, although the m.thod is quite general. We find, in an analytic.l fashion, the c.assic.l distribution arising from.the quantum.one as the zeroth order term.in an expansion in powers of Planc.’s c.nstant. We interpret the c.rrec.ion term. as residual quantum.effec.s at the m.c.osc.pic.m.c.osc.pic.boundary.

关键词： c.rrespondenc. Princ.ple c.assic.l Lim.ts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

应激对风险和社会决策的影响

心理科学进展 2016年第6期24卷 974-984页

作者：杨群李煜孙得琳 Tatia m.c.LEE 杭州师范大学教育学院心理学系杭州311121 香港大学神经心理学实验室美国Duke-UNc.成像分析中心香港大学认知情感神经科学实验室香港大学脑与认知科学国家重点实验室

应激是有机体在受到真实或者潜在的威胁刺激时所表现出来的全身性非特异性反应,伴随着紧张和焦虑的心理体验,交感神经系统的兴奋,糖皮质激素分泌的增多以及脑干-边缘系统-前额叶神经环路的改变。应激对个体在风险决策行为中的风险寻求... 详细信息

应激是有机体在受到真实或者潜在的威胁刺激时所表现出来的全身性非特异性反应,伴随着紧张和焦虑的心理体验,交感神经系统的兴奋,糖皮质激素分泌的增多以及脑干-边缘系统-前额叶神经环路的改变。应激对个体在风险决策行为中的风险寻求和风险回避倾向,社会决策行为中的利己和利他倾向都会产生重要影响。策略使用异常、习惯化和自动化反应增强、反馈学习过程以及奖惩敏感性的改变是应激影响决策行为的认知基础;应激激素的分泌,及杏仁核、前额叶等在决策过程发挥重要作用的脑区活动的改变则为应激作用于决策行为的神经基础。未来研究应重点关注:应激的个体差异与应激对决策影响效应多样性的关系;综合多种指标对应激进行测量;考察应激的时序效应;揭示个体的最佳应激水平;加强对慢性应激影响决策以及应激对决策影响效应可逆性的研究;揭示应激影响决策的神经机制。

关键词：应激特里尔社会应激测试风险决策社会决策

在线全文

学校读者我要写书评

暂无评论

森林冠层上湍流尺度、耗散率和湍流结构参数

北京大学学报（自然科学版） 2003年第1期39卷 73-82页

作者：刘树华胡非刘辉志 XU m. 朱廷曜金昌杰北京大学物理学院大气科学系北京100871 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室北京100029 Nc.R/RAP 中国科学院沈阳应用生态研究所沈阳110015

利用新型三维超声风速温度仪 ,在中国东北长白山原始森林冠层以上观测的湍流资料 ,计算并分析了森林冠层上的湍涡特征长度尺度、湍流动量和热量耗散率、湍流动量和热量结构参数的特征。结果表明 :湍流动量湍涡特征长度尺度与稳定度参... 详细信息

利用新型三维超声风速温度仪 ,在中国东北长白山原始森林冠层以上观测的湍流资料 ,计算并分析了森林冠层上的湍涡特征长度尺度、湍流动量和热量耗散率、湍流动量和热量结构参数的特征。结果表明 :湍流动量湍涡特征长度尺度与稳定度参数Z L成正相关 ;湍流热量特征长度尺度与稳定度参数Z L在不稳定层结时 ,成正相关 ,在稳定层结时近似成负相关 ;在不稳定和稳定层结大气中 ,利用湍流谱方法和利用风速垂直分量方差、温度脉动方差和Ric.ardson数计算的湍流动量、热量耗散率和湍流动量、热量结构参数有较好的一致性 ;无量纲湍流结构参数c.vz2 3 σ-2w和c.Tz2 3 σ-2T 是Ric.ardson数的函数 ;湍流热力结构参数c.T 与感热通量w′T′具有较好的线性关系。

关键词：湍流森林冠层动量热量湍涡长度尺度耗散率结构参数湍流谱