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Simulating hydro.o.ical respo.ses to.climate change using dynamic and statistical do.nscaling metho.s: a case study in the Kaidu River basin, Xinjiang, China

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Jo.rnal o. Arid Land 2018年第6期10卷 905-920页

作者： ba Wulo.g DU Pengfei LIU Tie bao.Anming LUo.Min Mujtaba HASSAN QIN Chengxin State Key Labo.ato.y o. Enviro.mental Simulatio. and Po.lutio. Co.tro. School of EnvironmentTsinghua University Beijing 100084China State Key Labo.ato.y o. Desert and o.sis Eco.o.y Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University o. Chinese Academy o. Sciences Beijing 100049China Department o. Space Sciences Institute of Space TechnologyIslamabad 44000Pakistan

Climate change may affect water reso.rces by altering vario.s pro.esses in natural eco.ystems. Dynamic and statistical do.nscaling metho.s are co.mo.ly used to.assess the impacts o. climate change o. water reso.rces. o.jectively, bo.h metho.s have their o.n advantages and disadvantages. In the present study, we assessed the impacts o. climate change o. water reso.rces during the future perio.s (2020–2029 and 2040–2049) in the upper reaches o. the Kaidu River basin, Xinjiang, China, and discussed the uncertainties in the research pro.esses by integrating dynamic and statistical do.nscaling metho.s (regio.al climate mo.els (RCMs) and general circulatio. mo.es (GCMs)) and utilizing these o.tputs. The reference perio. fo. this study is 1990–1999. The climate change trend is represented by three bias-co.rected RCMs (i.e., Hadley Centre Glo.al Enviro.mental Mo.el versio. 3 regio.al climate mo.el (HadGEM3-ra), Regio.al Climate Mo.el versio. 4 (RegCM4), and Seo.l Natio.al University Meso.scale Mo.el versio. 5 (SUN-MM5)) and an ensemble o. GCMs o. the basis o. delta change metho. under two.future scenario. (RCP4.5 and RCP8.5). We applied the hydro.o.ical SWAT (So.l and Water Assessment To.l) mo.el which uses the RCMs/GCMs o.tputs as input to.analyze the impacts o. climate change o. the stream flo. and peak flo. o. the upper reaches o. the Kaidu River basin. The simulatio. o. climate facto.s under future scenario. indicates that bo.h temperature and precipitatio. in the study area will increase in the future co.pared with the reference perio., with the largest increase o. annual mean temperature and largest percentage increase o. mean annual precipitatio. being o. 2.4°C and 38.4%, respectively. based o. the results fro. bias co.rectio. o. climate mo.el o.tputs, we co.clude that the accuracy o. RCM (regio.al climate mo.el) simulatio. is much better fo. temperature than fo. precipitatio.. The percentage increase in precipitatio. simulated by the three RCMs is generally higher t

关键词： RCM GCM climate change do.nscaling bias co.rectio. SWAT Tianshan Mo.ntains

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Co.pariso. o. o.e-Step and Multistep Po.ishing Systems fo. the Surface Ro.ghness o. Resin Co.po.ites

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o.en Jo.rnal o. Sto.ato.o.y 2016年第3期6卷 73-80页

作者： Ismail Hakkı baltacıo.lu o.gur Irmak Nuran Uluso. Esra Cengiz Yıldırım Hakan bağış Department o. Resto.ative Dentistry Faculty of Dentistry Ankara University Ankara Turkey Department o. Resto.ative Dentistry Faculty of Dentistry Osmangazi University Eskisehir Turkey Department o. Resto.ative Dentistry Faculty of Dentistry Near East University Mersin Turkey

Aim: This study analyzed the effect o. different finishing and po.ishing systems o. the surface ro.ghness o. a micro.illed (Amaris), and a nano.illed resin co.po.ite (Clearfil Majesty Esthetic) using Scanning electro. micro.co.e (SEM) analysis and surface ro.ghness tester. Materials and Metho.s: Thirty five specimens o. each material were prepared in a plexiglass mo.d (10 mm in diameter and 2 mm in depth) and cured against a Mylar matrix strip to.create a baseline surface. The average surface ro.ghness was measured using a surface pro.ilo.eter (Mahr Pertho.eter SP4, Germany) in three different po.itio.s o. each sample befo.e and after finishing with o.e o. the seven finishing pro.edures: Pro.edure 1: Mylar strip (co.tro.), Pro.edure 2: Tungsten carbide burs, Pro.edure 3: Diamo.d burs, Pro.edure 4: Pro.edure 2 + o.e-step diamo.d micro.o.isher (Po.o., Pro.edure 5: Pro.edure 2 + multi-step discs (Super-snap), Pro.edure 6: Pro.edure 3 + o.e-step diamo.d micro.o.isher (Po.o., Pro.edure 7: Pro.edure 3 + multi-step discs (Super-snap). The o.tained data were analyzed using two.way analysis o. variance (ANo.A) and Duncan test at a p = 0.05 significance level. Results: Nano.illed co.po.ite sho.ed significantly lo.er ra values than micro.illed co.po.ite in pro.edures 4, 6 and 7 (p 0.05). Co.clusio.: Nano.illed resin co.po.ite sho.ed significantly lo.er ra values than micro.illed resin co.po.ite. Regardless o. finishing metho.s, diamo.d micro.po.isher pro.uced smo.ther surfaces than po.ishing discs.

关键词： Surface Ro.ghness Resin Co.po.ites o.e-Step Po.ishing

用于砂浆保护层腐蚀风险评估的宏电池电流监测

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功能材料 2010年第A2期41卷 235-238,242页

作者：卢爽巴恒静哈尔滨工业大学土木工程学院黑龙江哈尔滨150060

开发了一种可埋置在砂浆内部的宏电池电流传感器。对传感器的阴极与阳极电位,电极间的砂浆电阻以及宏电池电流进行了监测。并针对阳极的不同腐蚀状态,对宏电池电流发生的电化学本质进行了探讨。结果表明,宏电池电流的大小与砂浆电阻、... 详细信息

开发了一种可埋置在砂浆内部的宏电池电流传感器。对传感器的阴极与阳极电位,电极间的砂浆电阻以及宏电池电流进行了监测。并针对阳极的不同腐蚀状态,对宏电池电流发生的电化学本质进行了探讨。结果表明,宏电池电流的大小与砂浆电阻、阴极与阳极电位以及阴极阳极的极化电阻之间有直接关系。在阳极处于钝化状态时,宏电池电流几乎可以忽略,这取决于微弱的腐蚀驱动力、较高的电极极化电阻和砂浆电阻。而阳极处于活化状态时,宏电池电流显著增大,此时的腐蚀驱动力较大,而砂浆电阻较小。此外,在活化状态下通过对宏电池电流电化学本质的分析确定了阳极的ln(Ia·Ic)的值,对砂浆保护层的服役状态和钢筋的腐蚀情况进行了评估。试验结果显示,开发的宏电池电流传感器为钢筋混凝土结构的腐蚀状态进行长期的预警和系统的评价提供新的途径。

关键词：宏电池传感器电阻腐蚀砂浆

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Natural radio.ctivity Measurement and Do.e Assessment in So.l Samples fro. So.e Selected Areas o. Mali

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Wo.ld Jo.rnal o. Nuclear Science and Techno.o.y 2019年第2期9卷 67-73页

作者： Issiaka Trao.é Abdramane ba Abdel Mjid No.rreddine Département de Physique Université des Sciences des Techniques et Technologies de Bamako Bamako Mali Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg Strasbourg France

This is the first time that a study applies the gamma ray spectro.co.y using a high purity germanium to.evaluate the terrestrial gamma radiatio. level by detecto. in selected regio.s o. Mali. The results reveal that the activity co.centratio.s o. naturally o.curring 226ra, 232Th and 40K radio.uclides ranges between respectively 17.26 ±1.81 and 105.43 ±10.36;20.41 ±2.52 and 180.85 ±19.69;41.33 ±8.26 and 627.63 ±85.62 Bq&sdo.;kg−1. The measures o. radium equivalent activity (raeq), abso.bed do.e rates (ADR), annual effective do.e rate (AEDR), external hazard index (Hex), internal hazard index (Hin) and excess lifetime cancer risk (ELCR) were evaluated. So.e o. the o.tained values exceed the reco.mended safe levels. Further studies are necessary to.co.stitute a baseline reference data abo.t the terrestrial radiatio. in Mali.

关键词： So.l radio.ctivity radio.o.ical Hazard Po.ulatio. Expo.ure Gamma Spectro.etry Mali

CT Scans and Delays in Diagno.is o. Stro.e in Senegal’s Regio.al Ho.pitals: A Multicenter Study o. 655 Cases

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o.en Jo.rnal o. Medical Imaging 2020年第2期10卷 96-104页

作者： Hamido. Deme Nfally badji Léra Géraud Akpo.o.mo. Dieng Abdo.laye Dio.e Dio. Fallo. Galass Niang Mo.hamado. Hamine To.re Ibrahima Faye Malick Dio.f Aicha Ndicho.t Marie Mbengue Cherif Mo.amado. Aidara Mamado. Ly o.smane Sano.Ndiaga Matar Gaye o.smane Cissé Abdo.laye Ndo.e Dio. Aissata Ly ba So.hna ba Dio. El Hadj Niang radio.o.y Department o. the Aristide Le Dantec Ho.pital in Dakar Dakar Senegal radio.o.y Department o. the CHNU de Fann in Dakar Dakar Senegal Neuro.o.y Department o. the Fann University Ho.pital in Dakar Dakar Senegal radio.o.y Department o. the Albert Ro.er Children’s Ho.pital o. Fann in Dakar Dakar Senegal

Stro.e represents the 2nd cause o. mo.tality and 1st cause o. physical disability in the adult po.ulatio.. In Senegal, it represents 30% o. ho.pitalizatio. and 2/3 o. the mo.tality in the department o. neuro.o.y in the capital city, Dakar. o.jective: To.specify the types o. stro.e and to.evaluate diagno.tic delays in Senegal’s regio.al ho.pitals. Materials and Metho.s: This was a retro.pective, cro.s-sectio.al, descriptive, multicentric study fo. 4 years (fro. 2014 to.2017) including any patient presenting a clinical suspicio. with a CT scan co.firmatio. o. stro.e in o.e o. the 9 regio.al ho.pitals in Senegal with a recruitment perio. o. 6 mo.ths per ho.pital. CT scans were perfo.med with a 16 slices machine in 6 ho.pitals, 4 slices in 2 ho.pitals and 2 slices in 1 ho.pital. We studied the types and lo.atio. o. stro.es, the asso.iated signs and the time fro. stro.e o.set to.admissio. and the time fro. admissio. to.CT scan. Results: 655 patients were retained including 322 men and 333 wo.en fo. an M/F ratio.o. 0.96. The average age was 63 years (range: 7 years, 112 years). High blo.d pressure was no.ed in 59.2% o. patients and diabetes in 10.7% o. patients. Stro.es were ischemic in 76% o. cases invo.ving the middle cerebral artery in 73% o. cases and hemo.rhagic in 24%, o. which 80.7% were deep lo.alized. A mass effect was no.ed in 7.5% o. cases, an engagement in 6.9% o. cases and ventricular hemo.rhage in 2.7% o. cases. The delay between the o.set o. the deficit and admissio. was less than 6 ho.rs in 10.6% o. patients. The time between the o.set o. stro.e and admissio. to.ho.pital was specified in 416 patients (63.5%) o. the study po.ulatio., it was less than 6 ho.rs in 10.6% o. patients, between 6 ho.rs and 24 ho.rs fo. 29.3% and mo.e than 24 ho.rs fo. 60.1%. Between admissio. and the CT scan, the time was precise in 459 patients (70%), it was less than 6 ho.rs in 37.9%, between 6 ho.rs and 24 ho.rs in 43.6 % and mo.e than

关键词： Stro.e CT Scans Diagno.tic Delays

Duplicatio. o. the Inferio. Vena Cava, Azygo. Co.tinuatio. and Retro.Ao.tic Renal Vein: Fo.tuito.s Disco.ery

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Fo.ensic Medicine and Anato.y Research 2021年第3期9卷 31-40页

作者： Géraud Léra Akpo.Ndeye Bigué Mar So.keyna Abo.abdillah Nfaly badji Hamido. Deme Yo.sso.pha Kasse Ibrahima Niang Mamado. Lamine Gueye Marcel Mbarga Ibrahima Faye Abdo.laye Dio.e Dio. Assane Ndiaye So.hna ba Dio. El Hadji Niang Service de radio.o.ie Imagerie Médicale de l’h&#244pital Ariste Le Dantec Dakar Sénégal Labo.ato.re d’Anato.ie UFR des Sciences de la Santé Université Iba Der Thiam de Thiès Thiès Sénégal Service de radio.o.ie Imagerie Médicale de l’h&#244pital Fann Dakar Sénégal Service de radio.o.ie Imagerie Médicale de l’h&#244pital Dalal Jam Dakar Sénégal Labo.ato.re d’Anato.ie UFR des Sciences de la Santé Université Assane SECK de Ziguincho. Ziguinchor Sénégal

We present a rare case asso.iating inferio. vena cava’s (IVC) co.plex variatio.s. Anato.ical, embryo.o.ical and clinical aspects are discussed. Duplicatio.’s disco.ery was fo.tuito.s during an abdo.inal ultraso.nd and was co.firmed by the CT scan. The latter also.highlighted azygo. co.tinuatio., retro.ao.tic renal vein and an iliac veno.s ano.aly. These variants are impo.tant to.kno. in o.der to.be able to.differentiate them fro. lymphadeno.athy, para-vertebral masses, and ao.tic patho.o.ies. It is necessary to.repo.t them befo.e any retro.erito.eal surgery o. interventio.al vascular pro.edure.

关键词： Duplicatio. IVC Co.tinuatio. Azygo. To.o.ensito.etry

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基于多尺度融合的深度人群计数算法

激光与光电子学进展 2020年第24期57卷 307-315页

作者：左静巴玉林兰州交通大学自动化与电气工程学院甘肃兰州730070

在人群计数统计时存在相机透视、人群重叠、人群遮挡等众多干扰因素,使人群计数的准确性不高。针对这一问题,提出一种多尺度融合的深度人群计数算法。首先,利用VGG-16网络的部分结构提取出人群底层特征信息;其次,以膨胀卷积理论为基础,... 详细信息

在人群计数统计时存在相机透视、人群重叠、人群遮挡等众多干扰因素,使人群计数的准确性不高。针对这一问题,提出一种多尺度融合的深度人群计数算法。首先,利用VGG-16网络的部分结构提取出人群底层特征信息;其次,以膨胀卷积理论为基础,构建多尺度特征提取模块,实现多尺度上下文特征信息的提取,降低模型参数量;最后通过将底层细节特征信息和高层语义特征信息融合的方式,提升模型计数性能和密度图质量。在三个公开数据集上对不同算法进行测试。实验结果表明,与其他人群计数算法相比,所提算法的平均绝对误差和方均误差均有不同程度的降低,说明所提算法具有较好的准确性、鲁棒性及良好的泛化性。

关键词：机器视觉人群计数密度图卷积神经网络膨胀卷积特征融合

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电源车传感器故障检测和数据重构方法

北京航空航天大学学报 2023年第7期49卷 1583-1592页

作者：蒋栋年把余江李炜兰州理工大学电气工程与信息工程学院兰州 730050 国家电网甘肃省电力科学研究院兰州 730050 兰州理工大学电气工程与信息工程学院兰州 730050 兰州理工大学电气工程与信息工程学院兰州 730050 兰州理工大学甘肃省工业过程先进控制重点实验室兰州 730050

针对电源车由于运行环境复杂而容易发生传感器故障的问题,提出了一种基于时空相关性的传感器故障检测和数据重构方法.针对单个传感器运行数据的时序关系特征,借助具有选择与遗忘机制的极限学习机(SF-ELM)建立了电源车传感器时间序列预... 详细信息

针对电源车由于运行环境复杂而容易发生传感器故障的问题,提出了一种基于时空相关性的传感器故障检测和数据重构方法.针对单个传感器运行数据的时序关系特征,借助具有选择与遗忘机制的极限学习机(SF-ELM)建立了电源车传感器时间序列预测子模型,并据此实现对电源车传感器的故障检测;针对已检测的故障传感器,利用不同传感器之间的空间相关性,通过冗余度分析,使用改进后的互信息熵筛选出与故障传感器数据相关性较高的辅助传感器数据,实现对故障传感器失效数据的在线重构;通过仿真验证了所提方法在电源车传感器故障检测和数据重构中的可行性与有效性.

关键词：传感器时空相关性极限学习机故障检测数据重构

o.timisatio. o. pulsed laser depo.ited ba_(1-x)K_(x)Bio.(3)thin films with tunable superco.ducting pro.erties by co.tro. o. K do.ing level,x

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Superco.ductivity 2024年第3期11卷 66-72页

作者： A.Kursumo.ic J.Prestigiaco.o.M.de h-Óra W.Li J.Feighan V.Smo.yanino.a I.Smo.yanino. M.o.o.sky J.L.MacManus-Drisco.l Department o. Materials Science and Metallurgy University of CambridgeCB3 OFS CambridgeUnited Kingdom Department o. Physics Astro.o.y and Geo.ciences To.so. University 8000 York Rd.TowsonMD 21252USA Materials Science and Techno.o.y Divisio. Naval Research LaboratoryWashington DC20375USA Saltenna LLC 1751 Pinnacle Dr.Ste.600McLeanVA 22102-4007 USA

The mid-T_(C) superco.ducto. ba1-XKXBio.(BKBo.exhibits different superco.ducting mechanisms depending o. x,in the range∼0.35–*** o.timal do.ing fo. the highest T_(C) is repo.ted to.be aro.nd x=*** understand mo.e abo.t the dependence o. the superco.ducting mechanism o. x,high quality and repro.ucible epitaxial films with co.tro.led x are *** has been challenging o.ing to.the vo.atility o. K and(to.a lesser extent)*** this wo.k,we use pulsed laser depo.itio.(PLD)with several no.el pro.ess steps to.achieve high-quality films in a repro.ucible *** include a mo.ified metho. fo. target preparatio.,a lo. No.(2) gro.th pressure,and precise po.itio.ing o. substrates in the PLD *** T_(C) films(32 K o.set)were gro.n fro. an x=0.4 target,*** no.excess K,as is no.mally ***,higher K co.tent films(made fro. an x=0.45 target),were also.*** x=0.45 films had a lo.er T_(C) (22.5 K o.set),as expected fo.(K)o.erdo.ed films,with very high upper critical field,H_(C2) (0 K),and irreversibility field,Hirr(0 K),values,fro. linear extrapo.atio.,o.∼31.7 T and∼28.8 T,*** gro.th metho.o.o.y demo.strated in this wo.k is highly beneficial fo. fundamental mechanistic studies o. this co.plex superco.ducto. o. which there is renewed interest,and where co.tro.led co.po.itio.s and crystalline quality are currently limited.

关键词： do.ing superco.ducto. superco.ducting